FreeCalypso > hg > freecalypso-tools

annotate doc/Target-utils @ 700:db9a8e88e63f

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
target-utils lunadrv program written, compiles
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 07 May 2020 02:19:51 +0000
parents bdaa4e7c9c05
children ff3d8167fa94
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
521
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 FreeCalypso target-utils suite
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
2 ==============================
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
3
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
4 We have a suite of standalone programs and specialized code pieces that run on
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5 the Calypso ARM7 processor, but are not regular operational phone or modem
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
6 firmware; this suite of code bits is called target-utils, maintained and
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7 distributed together with FreeCalypso host tools. The primary reason for the
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8 coupling between FC host tools and target-utils is that the target-utils suite
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9 provides the loadagent target program for fc-loadtool and fc-xram host tools,
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10 as well as compalstage code pieces needed for operating on Compal phones.
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12 Most programs in the target-utils suite are meant to execute out of RAM
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13 (specifically, the Calypso chip's internal RAM or IRAM for short), loaded and
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14 run via fc-iram or fc-compalram - they are not meant to be flashed. As of this
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
15 writing, the following run-from-RAM programs are available:
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
16
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
17 buzplayer Player for buzzer melodies, used by fc-buzplay
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
18 c139explore Mot C139 hardware exploration program
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
19 calversion Calypso version ID tool, primarily for the DSP ROM version
550
bdaa4e7c9c05 doc/Target-utils: dspdump documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 532
diff changeset
20 dspdump Calypso DSP ROM dump tool
521
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21 helloapp Hello-world program
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
22 loadagent Flash manipulation and XRAM loading agent
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
23 pirexplore Pirelli DP-L10 hardware exploration program
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
24 simtest Low-level exerciser for the SIM interface hardware
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
25
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
26 Aside from c139explore which is built as a binary to be loaded via fc-compalram
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
27 (Compal's bootloader protocol), all of the above programs are built as S-record
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
28 images to be loaded via fc-iram. Once loaded via the respective serial code
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
29 download protocol, each of the listed programs runs interactively, listening
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
30 for and executing commands given over the serial port. The specific set of
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
31 available commands is different for each program as relevant to its function,
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
32 but the command framework is common across the target-utils suite. The command
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
33 interface is text-based, such that each program can be driven manually by a
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
34 human operator once fc-iram or fc-compalram has dropped into the tty pass-thru
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
35 mode, but this same text-based command interface can also be driven by other
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
36 programs: fc-loadtool and fc-xram drive loadagent, and fc-buzplay drives
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
37 buzplayer.
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
38
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
39 Code architecture and execution environment
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
40 ===========================================
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
41
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
42 Our target-utils suite is built with the GNU toolchain (gcc+binutils), not TI's
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
43 proprietary TMS470 compiler. Because all of target-utils are meant to run out
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
44 of IRAM rather than flash or XRAM, we compile all code in ARM mode (not Thumb),
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
45 and we build without interworking support (no -mthumb-interwork): the ARMv4T
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
46 architecture implemented by the ARM7TDMI core in the Calypso does not support
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
47 penalty-free ARM/Thumb interworking, thus ARM-only code without interworking
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
48 support is the most efficient option for execution out of IRAM.
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
49
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
50 Selection of UART for communication
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
51 ===================================
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
52
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
53 All target-utils programs are interactive, listening for text commands given
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
54 over a serial port. But which UART? The Calypso chip has two UARTs, called
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
55 MODEM and IrDA in the chip docs - which of the two should be used for host
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
56 communication? The answer is a trick original to FreeCalypso: most of our
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
57 target-utils programs that are meant to be loaded via fc-iram expect to be
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
58 loaded specifically via the Calypso boot ROM and not in some other way, and
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
59 they look at some of the IRAM variables left behind by the boot ROM code. The
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
60 boot ROM listens on both UARTs for an interrupt-boot sequence, and once it
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
61 receives that sequence on one of the UARTs, it remembers which UART it was and
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
62 uses that same UART for the rest of the serial code download protocol. We read
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
63 that same variable set by the boot ROM, which depends on the boot ROM version.
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
64 To handle different Calypso boot ROM versions, we read the 16-bit word at 0x1FFE
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
65 (the last 16 bits of the boot ROM image) where TI put the boot ROM version
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
66 number, and we support boot ROM versions 0200 (Calypso C05 rev B silicon) and
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
67 0300 (Calypso C035 silicon). Most target-utils programs won't work (will fail
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
68 to select the UART for communication) if the boot ROM is some unsupported
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
69 version or missing altogether, or if the boot ROM is there, but didn't do the
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
70 loading.
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
71
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
72 The exceptions are as follows:
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
73
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
74 * c139explore always uses the MODEM UART as appropriate for Mot C139;
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
75
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
76 * flash-boot-test (a flashable program described later in this article) always
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
77 uses the IrDA UART;
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
78
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
79 * helloapp is built in 3 versions: helloapp-bootrom.srec, helloapp-irda.srec
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
80 and helloapp-modem.srec. The first version depends on the boot ROM like
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
81 other programs, the other two versions are built as fixed-IrDA or fixed-MODEM.
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
82
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
83 Other boot ROM and fc-iram dependencies
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
84 =======================================
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
85
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
86 There are two other ways in which target-utils programs that are meant to be
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
87 loaded via fc-iram depend on the Calypso boot ROM:
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
88
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
89 1) The Calypso gets its clock input from the RF section of the GSM device, and
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
90 the RF block can feed either 13 MHz or 26 MHz to the Calypso - some GSM RF
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
91 transceiver chips require 13 MHz (TI Clara), others require 26 MHz (TI Rita
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
92 and Silabs Aero II), yet others can work with either clock (Silabs Aero+),
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
93 and some use a 26 MHz crystal but have the option of feeding either 13 or
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
94 26 MHz to the Calypso (Aero II). The Calypso initially boots without knowing
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
95 what clock frequency it is running at, but then it needs to be told via a
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
96 register setting what the input clock frequency is, so that all peripherals
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
97 (both GSM-specific and general-purpose) always run at 13 MHz.
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
98
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
99 When the Calypso boot process is interrupted and diverted to serial code
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
100 download in the boot ROM, the boot ROM code autodetects whether the CLKTCXO
527
aa4f70e36cbd doc/Target-utils: typo fix
Mychaela Falconia <falcon@freecalypso.org>
parents: 521
diff changeset
101 input runs at 13 MHz or 26 MHz (it tries both register bit settings until
521
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
102 the serial '<' characters sent by the host at 19200 baud are received
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
103 correctly), and if the CLKTCXO input is 26 MHz, the VCLKOUT_DIV2 bit is set
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
104 in the FFFF:FD02 register. Most of our target-utils programs have no hard-
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
105 coded knowledge of the 13 MHz vs. 26 MHz board hardware configuration and
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
106 rely on the Calypso boot ROM to set the division control bits in the
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
107 FFFF:FD02 register correctly for the autodetected clock.
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
108
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
109 2) The boot ROM allows the serial download host (fc-iram in our case) to
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
110 configure the Calypso DPLL, allowing the ARM7 core to run at its maximum
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
111 frequency of 52 MHz on Calypso C035 or 39 MHz on the older Calypso C05
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
112 silicon. None of our target-utils programs do their own DPLL setup, instead
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
113 they run with whatever they were booted with - therefore, in order for the
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
114 IRAM programs to run at their intended fastest speed, the correct -h option
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
115 needs to be given to fc-iram, selecting a hardware parameter file with the
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
116 right pll-config setting.
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
117
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
118 Delay loop timing
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
119 =================
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
120
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
121 There are a few places in target-utils where a delay of some specific duration
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
122 needs to be inserted. In most cases the requirement is for a certain minimum
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
123 delay, with more delay time being harmless except for inefficiency, but there
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
124 is one case (SPCA552E chip initialization in pirexplore) where the delay
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
125 requirement is strict: if the delays are too short or too long, the LCD doesn't
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
126 work. In target-utils all of these delays are implemented with CPU-cycle-count
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
127 delay loops that are calibrated at software design time; if the code runs out
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
128 of IRAM and the ARM7 core runs at 52 MHz, the delays will be exactly as
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
129 designed, otherwise they will be longer. In the case of pirexplore the strict
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
130 timing requirement is satisfied by loading and running the program via fc-iram
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
131 -h pirelli, resulting in the correct 52 MHz clock configuration; in all other
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
132 cases running at a frequency below 52 MHz or running out of flash (the
6604403aa212 doc/Target-utils: checking in unfinished document
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
133 flash-boot-test special case) produces longer-than-needed delays.
528
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
134
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
135 Common interactive commands
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
136 ===========================
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
137
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
138 The exact set of implemented commands is different for each target-utils
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
139 program, including commands specific to each program's unique function, but the
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
140 following basic commands are included in most programs:
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
141
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
142 abbinit Initialize ABB communication
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
143 abbpage2 Unlock access to ABB register page 2
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
144 abbr pg reg Read ABB register <reg> on page <pg>
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
145 abbw pg reg val Write <val> into register <reg> on page <pg>
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
146 dump hex-start hex-len Display a human-oriented memory dump in hex and ASCII
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
147 jump addr Jump to given address with BX
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
148 poweroff Execute Iota ABB soft poweroff (DEVOFF)
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
149 r8 addr Read an 8-bit register or memory location
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
150 r16 addr Read a 16-bit register or memory location
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
151 r32 addr Read a 32-bit register or memory location
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
152 w8 addr data Write an 8-bit register or memory location
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
153 w16 addr data Write a 16-bit register or memory location
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
154 w32 addr data Write a 32-bit register or memory location
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
155
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
156 For further details, please refer to the source code - if you are playing with
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
157 such low-level components, you need to put on the hat of a developer rather
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
158 than a mere user.
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
159
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
160 ABB support in target-utils
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
161 ===========================
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
162
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
163 Our target-utils suite includes code for initializing and executing SPI
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
164 communication with the Iota ABB device (TWL3014 or TWL3025), Calypso's analog
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
165 and power management companion chip. Only Iota ABB type is supported, not
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
166 Omega/Nausica or Syren. The primary reason for having this infrastructure is
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
167 to be able to perform a soft poweroff operation, i.e., to return the Calypso
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
168 phone or modem to its switched-off state after flashing or various standalone
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
169 debug operations, but once implemented, this same ABB SPI communication
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
170 infrastructure is also used in model-specific hardware exploration utilities
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
171 for functions like keypad backlight and vibrator control which are implemented
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
172 via the ABB on some models, and it is used in simtest to control the part of
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
173 the SIM interface that resides in the Iota ABB.
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
174
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
175 Aside from specialized programs like c139explore that are specific to target
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
176 devices known to use the Iota ABB, most target-utils programs do not execute
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
177 any ABB or SPI communication code (not even initialization) until they receive
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
178 one of the ABB commands: abbinit, abbr, abbw or poweroff. This way if someone
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
179 comes across a Calypso device that has a different ABB type or needs to debug a
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
180 board with broken ABB communication, one can explore other functions without
532
0b04f9b30ea1 doc/Target-utils: documented auto-abbinit in simtest
Mychaela Falconia <falcon@freecalypso.org>
parents: 529
diff changeset
181 touching ABB commands. (simtest is another exception: even though it is not
0b04f9b30ea1 doc/Target-utils: documented auto-abbinit in simtest
Mychaela Falconia <falcon@freecalypso.org>
parents: 529
diff changeset
182 specific to one particular target device like c139explore, its main function of
0b04f9b30ea1 doc/Target-utils: documented auto-abbinit in simtest
Mychaela Falconia <falcon@freecalypso.org>
parents: 529
diff changeset
183 exercising the SIM interface depends on the Iota ABB, thus it is restricted to
0b04f9b30ea1 doc/Target-utils: documented auto-abbinit in simtest
Mychaela Falconia <falcon@freecalypso.org>
parents: 529
diff changeset
184 Calypso+Iota targets.)
528
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
185
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
186 The abb_init() function invoked by the abbinit command may be invoked multiple
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
187 times: it maintains an internal flag remembering if the initialization steps
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
188 have already been done or not, and repeated invokations do nothing. User-
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
189 friendly abbr, abbw and poweroff commands invoke abb_init() internally, but the
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
190 special abbpage2 command does not - if you are interested in exploring the
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
191 undocumented register page 2, you need to execute abbinit manually first, then
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
192 abbpage2, then explore with abbr and abbw.
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
193
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
194 poweroff operation details: VRPCAUX and VRPCDEV
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
195 ===============================================
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
196
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
197 The abb_power_off() function invoked by the poweroff command performs the
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
198 following sequence of steps:
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
199
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
200 * Calls abb_init() to establish ABB communication in the case that it hasn't
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
201 already been done;
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
202
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
203 * Executes the magic writes to TAPCTRL and TAPREG registers that unlock access
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
204 to register page 2 - this step is factored out into the abb_unlock_page2()
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
205 function which is also accessible as the abbpage2 command;
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
206
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
207 * Writes 0x007 into the undocumented VRPCAUX register to clear the erratic
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
208 state that will be there if we got booted via nTESTRESET rather than PWON;
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
209
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
210 * Flushes all UART output, i.e., waits for it to finish going out on the wire;
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
211
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
212 * Writes 0x001 into the VRPCDEV register, which is the actual DEVOFF command.
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
213
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
214 The step of writing into VRPCAUX and its prerequisite page 2 unlock steps are a
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
215 recent addition as of fc-host-tools-r11; these steps have been added to fix the
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
216 erratic behaviour that was occurring on TI/FC development boards (D-Sample and
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
217 FCDEV3B) when fc-loadtool (or fc-iram with some specialized target-utils
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
218 program) was entered via the RESET button rather than PWON, followed by the
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
219 soft poweroff operation and another switch-on via PWON. For more details,
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
220 please refer to the Calypso-test-reset article in the freecalypso-docs
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
221 repository.
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
222
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
223 If you are interested in doing some experiments of your own with this
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
224 undocumented quirk of the Calypso+Iota chipset and the odd behaviour it can
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
225 cause, you can do the following:
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
226
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
227 * To see the content of the undocumented VRPCAUX register resulting from
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
228 different boot modes, execute these commands:
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
229
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
230 abbinit
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
231 abbpage2
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
232 abbr 2 30
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
233
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
234 Our abbr and abbw commands support page 2, but if you don't issue the magic
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
235 register writes encapsulated in the abbpage2 command, the Iota chip itself
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
236 disallows access to page 2.
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
237
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
238 * To perform a DEVOFF operation without cleaning up VRPCAUX first (to see the
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
239 resulting erratic behaviour with your own eyes), do it manually as follows:
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
240
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
241 abbw 0 30 1
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
242
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
243 flash-boot-test
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
244 ===============
81a3fc069301 doc/Target-utils: ABB support documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 527
diff changeset
245
529
30bec872824a doc/Target-utils: flash-boot-test documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 528
diff changeset
246 In addition to the repertoire of run-from-IRAM (loadable via fc-iram) programs
30bec872824a doc/Target-utils: flash-boot-test documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 528
diff changeset
247 that form the main course of target-utils, we have a flashable program called
30bec872824a doc/Target-utils: flash-boot-test documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 528
diff changeset
248 flash-boot-test - it will be called FBT for short in this article. FBT is a
30bec872824a doc/Target-utils: flash-boot-test documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 528
diff changeset
249 test case for the "main application" in flash, and it can be flashed in the
30bec872824a doc/Target-utils: flash-boot-test documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 528
diff changeset
250 place of a regular firmware image for certain very low-level tests. Because it
30bec872824a doc/Target-utils: flash-boot-test documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 528
diff changeset
251 runs via the flash boot path and does not get loaded serially, FBT is quite
30bec872824a doc/Target-utils: flash-boot-test documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 528
diff changeset
252 hardware-specific by necessity: it assumes a platform with 26 MHz Calypso clock
30bec872824a doc/Target-utils: flash-boot-test documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 528
diff changeset
253 input and always uses the IrDA UART for communication (hard-coded). FBT was
30bec872824a doc/Target-utils: flash-boot-test documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 528
diff changeset
254 written with FCDEV3B and Openmoko GTA02 boards in mind; it won't work on a
30bec872824a doc/Target-utils: flash-boot-test documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 528
diff changeset
255 D-Sample board because of the 13 MHz vs. 26 MHz clock difference.
30bec872824a doc/Target-utils: flash-boot-test documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 528
diff changeset
256
30bec872824a doc/Target-utils: flash-boot-test documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 528
diff changeset
257 FBT is built in two versions: fbt-mode0.bin and fbt-mode1.bin, differing in the
30bec872824a doc/Target-utils: flash-boot-test documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 528
diff changeset
258 magic words at location 0x2000 which tell the Calypso boot ROM how the main
30bec872824a doc/Target-utils: flash-boot-test documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 528
diff changeset
259 application in flash should be booted - please refer to the Flash-boot-modes
30bec872824a doc/Target-utils: flash-boot-test documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 528
diff changeset
260 article in the freecalypso-docs repository. Only the magic words differ between
30bec872824a doc/Target-utils: flash-boot-test documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 528
diff changeset
261 fbt-mode0.bin and fbt-mode1.bin versions; the main body of the code is exactly
30bec872824a doc/Target-utils: flash-boot-test documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 528
diff changeset
262 the same. Once it receives control from the boot ROM in whichever mode it was
30bec872824a doc/Target-utils: flash-boot-test documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 528
diff changeset
263 booted in, FBT's own code in main.c does the absolute minimum initialization to
30bec872824a doc/Target-utils: flash-boot-test documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 528
diff changeset
264 allow serial communication (sets the VCLKOUT_DIV2 bit in the FFFF:FD02 register
30bec872824a doc/Target-utils: flash-boot-test documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 528
diff changeset
265 and initializes the IrDA UART) and falls into the same interactive mode of
30bec872824a doc/Target-utils: flash-boot-test documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 528
diff changeset
266 operation (listening for text-based commands) as our various run-from-IRAM
30bec872824a doc/Target-utils: flash-boot-test documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 528
diff changeset
267 programs, allowing the operator to explore system state as closely out of boot
30bec872824a doc/Target-utils: flash-boot-test documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 528
diff changeset
268 as possible.
30bec872824a doc/Target-utils: flash-boot-test documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 528
diff changeset
269
30bec872824a doc/Target-utils: flash-boot-test documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 528
diff changeset
270 When a main application in flash is booted in mode 1 (with the boot ROM moved
30bec872824a doc/Target-utils: flash-boot-test documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 528
diff changeset
271 out of the way), the Calypso watchdog timer is running, and our FBT program
30bec872824a doc/Target-utils: flash-boot-test documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 528
diff changeset
272 does not a perform a watchdog disable step on its own. Therefore, if you flash
30bec872824a doc/Target-utils: flash-boot-test documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 528
diff changeset
273 fbt-mode1.bin and boot it, you will see it keep endlessly rebooting about every
30bec872824a doc/Target-utils: flash-boot-test documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 528
diff changeset
274 9 s. To stop this endless reboot cycle, issue a wd (watchdog disable) command:
30bec872824a doc/Target-utils: flash-boot-test documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 528
diff changeset
275 it is short enough to be easily typed in the available 9 s window. The same
30bec872824a doc/Target-utils: flash-boot-test documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 528
diff changeset
276 issue does not occur in flash boot mode 0, as the Calypso boot ROM does disable
30bec872824a doc/Target-utils: flash-boot-test documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 528
diff changeset
277 the watchdog and leaves it disabled when booting mode 0 flash images or serially
30bec872824a doc/Target-utils: flash-boot-test documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 528
diff changeset
278 downloaded code.
30bec872824a doc/Target-utils: flash-boot-test documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 528
diff changeset
279
30bec872824a doc/Target-utils: flash-boot-test documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 528
diff changeset
280 FBT also has a few other commands that have been added to facilitate further
30bec872824a doc/Target-utils: flash-boot-test documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 528
diff changeset
281 experimentation with the watchdog timer feature of the Calypso chip - please
30bec872824a doc/Target-utils: flash-boot-test documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 528
diff changeset
282 refer to the source code.