annotate doc/Leonardo-target @ 638:cab2f315827e

FFS dev.c: added Spansion PL032J to the "generic" table With the discovery of first GTM900 and then Tango, it now appears that Openmoko was not the only manuf after all who kept TI's TCS211 firmware largely intact (as opposed to changing it beyond all recognition like Compal, Chi-Mei and BenQ did), thus we are now getting new "alien" targets on which we reuse the original manuf's FFS with IMEI and RF calibration tables as if it were native. On these targets we use the original device table for FFS, even though we previously thought that it would never apply to any target other than dsample, leonardo and gtamodem. We have previously added Samsung K5L33xxCAM (a new kind of multi-ID device) to the generic table to support its use in Huawei GTM900-B modules; now we got news that some slightly older GTM900-B specimen used S71PL032J instead, so we are now adding PL032J as well.
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 30 Jan 2020 17:45:48 +0000
parents 6edd9be81b94
children edaceb78719a
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
626
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 TI's primary development platform for TCS211 firmware was D-Sample - see our
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
2 D-Sample article for explanation of our current limited support for that target
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
3 in FC Magnetite - but they also had another platform called Leonardo. The
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
4 primary difference is the RF section: D-Sample had Clara RF (the one for which
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5 we lack support), whereas Leonardo was TI's reference platform for Rita RF and
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
6 for the complete Calypso+Iota+Rita chipset. Another major difference is that
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7 D-Sample was a single stable platform, whereas Leonardo was made in a
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8 bewildering assortment of different variants.
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10 We (FreeCalypso core team) never succeeded in getting our hands on a real
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11 TI-made Leonardo board of any variant, but we do have a Leonardo build target
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12 in FC Magnetite for two reasons:
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14 1) Adding this build target was trivial: our starting hw target for which we
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
15 got our original starting-point fw was Openmoko's embedded GSM/GPRS modem,
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
16 and that modem is a very close derivative of Leonardo. The only firmware-
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
17 affecting diff between Leonardo and OM's modem is FIC/OM's reshuffling of
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
18 TSPACT control lines for their triband RFFE; producing a build configuration
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
19 with these TSPACT control signals put back into their original Leonardo
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
20 arrangement became trivial once our reconstruction of tpudrv12.c from
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21 disassembly of tpudrv12.obj reached production quality.
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
22
634
6edd9be81b94 doc/Leonardo-target: update for Tango and Caramel
Mychaela Falconia <falcon@freecalypso.org>
parents: 630
diff changeset
23 2) At the end of 2019 we discovered a certain modem module which we call Tango,
6edd9be81b94 doc/Leonardo-target: update for Tango and Caramel
Mychaela Falconia <falcon@freecalypso.org>
parents: 630
diff changeset
24 and this Tango module is essentially a mass-produced version of TI's Leonardo
6edd9be81b94 doc/Leonardo-target: update for Tango and Caramel
Mychaela Falconia <falcon@freecalypso.org>
parents: 630
diff changeset
25 core. Tango is just the core of Leonardo, without any peripherals, thus a
6edd9be81b94 doc/Leonardo-target: update for Tango and Caramel
Mychaela Falconia <falcon@freecalypso.org>
parents: 630
diff changeset
26 proper fw build target for any given Tango-based platform is going to be a
6edd9be81b94 doc/Leonardo-target: update for Tango and Caramel
Mychaela Falconia <falcon@freecalypso.org>
parents: 630
diff changeset
27 little different from Leonardo in terms of GPIO and other peripheral config
6edd9be81b94 doc/Leonardo-target: update for Tango and Caramel
Mychaela Falconia <falcon@freecalypso.org>
parents: 630
diff changeset
28 (see our tangomdm target), but initially we ran our Magnetite-Leonardo fw
6edd9be81b94 doc/Leonardo-target: update for Tango and Caramel
Mychaela Falconia <falcon@freecalypso.org>
parents: 630
diff changeset
29 (built for target leonardo) on our Caramel board - it runs just fine except
6edd9be81b94 doc/Leonardo-target: update for Tango and Caramel
Mychaela Falconia <falcon@freecalypso.org>
parents: 630
diff changeset
30 for GPIO config being slightly wrong, leaving a few GPIO lines floating.
626
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
31
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
32 Supported Leonardo variants
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
33 ===========================
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
34
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
35 RF bands: there were several Leonardo variants with full quadband RF using Epcos
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
36 M034F FEM, and there were several more variants with artifically restricted RF,
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
37 using a dual-band/single-region FEM and supporting only the two EU bands. The
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
38 two versions should be firmware-compatible according to our available schematics
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
39 (the same TSPACT signals are used for Tx control), thus our Magnetite-Leonardo
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
40 fw should run on any Leonardo variant that matches any of our known schematic
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
41 versions at least in the principal aspects.
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
42
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
43 Flash memory: our Magnetite-Leonardo fw supports the following flash chips for
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
44 FFS:
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
45
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
46 4 MiB: Fujitsu MBM29DL320FB or MBM29DL320FT
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
47 8 MiB: Am29DL640G or its Fujitsu equivalent, or any MCP containing this flash
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
48 16 MiB: Spansion PL129J or its AMD predecessor, second bank on nCS2
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
49
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
50 If anyone finds a Leonardo variant with some other flash, it may not be
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
51 supported out of the box - but our included FFS configs for the Leonardo target
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
52 come directly from TI's original TCS211 version (it is highly unlikely that OM
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
53 changed anything other than adding their Samsung flash), thus we support
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
54 everything that TI's own TCS211 supported out of the box.
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
55
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
56 Memory size limits
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
57 ==================
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
58
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
59 The linker script template we use for target leonardo has memory region size
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
60 limits set as follows: 8 MiB of flash, 2 MiB of XRAM and 512 KiB of IRAM. If
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
61 you are working with a Leonardo or Leonardo-compatible board that has smaller
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
62 flash or XRAM, or has a Calypso Lite chip with only 256 KiB of IRAM, then you
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
63 have to manually ensure that you stay within your actual memory limits, as you
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
64 won't get a failing link unless you exceed the larger linker script limits.
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
65
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
66 If you are building a modem-only fw configuration (l1reconst or hybrid), it
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
67 will fit into under 3 MiB of flash (fitting into a 4 MiB flash chip together
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
68 with FFS), 512 KiB of XRAM and 256 KiB of IRAM, so you are safe unless you are
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
69 going to add a lot of your own code or data space. But if you are going to
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
70 build a UI-enabled fw config (2092 or hybrid-ui), then you will need at least
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
71 an 8 MiB flash chip (won't fit into a 4 MiB chip together with FFS) and at least
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
72 1 MiB of XRAM. So far all of our configs fit into 256 KiB of IRAM.
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
73
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
74 Different Calypso chip versions
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
75 ===============================
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
76
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
77 If you specify the build target as just leonardo, your fw will be configured
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
78 and built for the leonardo-dsp36 target. If you actually need leonardo-c05b or
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
79 leonardo-dsp34 because your board has an older Calypso chip version on it, then
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
80 you will need to specify the build target as just stated - see the
41238a8e140c Leonardo target documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
81 Calypso-version-override article.
630
b639f7ab0007 Leonardo GPIO 2 fix
Mychaela Falconia <falcon@freecalypso.org>
parents: 626
diff changeset
82
b639f7ab0007 Leonardo GPIO 2 fix
Mychaela Falconia <falcon@freecalypso.org>
parents: 626
diff changeset
83 Calypso GPIO 2 configuration
b639f7ab0007 Leonardo GPIO 2 fix
Mychaela Falconia <falcon@freecalypso.org>
parents: 626
diff changeset
84 ============================
b639f7ab0007 Leonardo GPIO 2 fix
Mychaela Falconia <falcon@freecalypso.org>
parents: 626
diff changeset
85
b639f7ab0007 Leonardo GPIO 2 fix
Mychaela Falconia <falcon@freecalypso.org>
parents: 626
diff changeset
86 On TI's C-Sample and D-Sample boards Calypso GPIO 2 is wired to serve as the DCD
b639f7ab0007 Leonardo GPIO 2 fix
Mychaela Falconia <falcon@freecalypso.org>
parents: 626
diff changeset
87 output for the MODEM UART (Calypso device as DCE), and our FC Magnetite firmware
b639f7ab0007 Leonardo GPIO 2 fix
Mychaela Falconia <falcon@freecalypso.org>
parents: 626
diff changeset
88 drives it as such on D-Sample, FCDEV3B and GTM900 targets. But this same config
b639f7ab0007 Leonardo GPIO 2 fix
Mychaela Falconia <falcon@freecalypso.org>
parents: 626
diff changeset
89 does NOT apply to Leonardo: on the latter boards GPIO 2 is wired in a way that
b639f7ab0007 Leonardo GPIO 2 fix
Mychaela Falconia <falcon@freecalypso.org>
parents: 626
diff changeset
90 requires it to be configured as an input to Calypso, not an output.
b639f7ab0007 Leonardo GPIO 2 fix
Mychaela Falconia <falcon@freecalypso.org>
parents: 626
diff changeset
91
b639f7ab0007 Leonardo GPIO 2 fix
Mychaela Falconia <falcon@freecalypso.org>
parents: 626
diff changeset
92 TI's TCS211 firmware had this Leonardo GPIO 2 situation handled in a very
b639f7ab0007 Leonardo GPIO 2 fix
Mychaela Falconia <falcon@freecalypso.org>
parents: 626
diff changeset
93 bizarre manner: the main GPIO init code in AI_InitIOConfig() in armio.c made no
b639f7ab0007 Leonardo GPIO 2 fix
Mychaela Falconia <falcon@freecalypso.org>
parents: 626
diff changeset
94 differentiation between D-Sample and Leonardo and configured GPIO 2 as an
b639f7ab0007 Leonardo GPIO 2 fix
Mychaela Falconia <falcon@freecalypso.org>
parents: 626
diff changeset
95 output, then the init code in uartfax.c did the same setup again, but at the
b639f7ab0007 Leonardo GPIO 2 fix
Mychaela Falconia <falcon@freecalypso.org>
parents: 626
diff changeset
96 end of the Init_Serial_Flows() function in the init module (which we only got
b639f7ab0007 Leonardo GPIO 2 fix
Mychaela Falconia <falcon@freecalypso.org>
parents: 626
diff changeset
97 as init.obj, with init.c censored out) they inserted a bit of code that switches
b639f7ab0007 Leonardo GPIO 2 fix
Mychaela Falconia <falcon@freecalypso.org>
parents: 626
diff changeset
98 GPIO 2 to be an input. What a mess.
b639f7ab0007 Leonardo GPIO 2 fix
Mychaela Falconia <falcon@freecalypso.org>
parents: 626
diff changeset
99
b639f7ab0007 Leonardo GPIO 2 fix
Mychaela Falconia <falcon@freecalypso.org>
parents: 626
diff changeset
100 Our handling of this GPIO 2 situation in FC Magnetite is much cleaner: we have
b639f7ab0007 Leonardo GPIO 2 fix
Mychaela Falconia <falcon@freecalypso.org>
parents: 626
diff changeset
101 put an #ifndef CONFIG_TARGET_LEONARDO around the AI_ConfigBitAsOutput(2) call
b639f7ab0007 Leonardo GPIO 2 fix
Mychaela Falconia <falcon@freecalypso.org>
parents: 626
diff changeset
102 in AI_InitIOConfig() so this GPIO line never becomes an output in the first
b639f7ab0007 Leonardo GPIO 2 fix
Mychaela Falconia <falcon@freecalypso.org>
parents: 626
diff changeset
103 place, and our targets/leonardo.h configuration header defines
b639f7ab0007 Leonardo GPIO 2 fix
Mychaela Falconia <falcon@freecalypso.org>
parents: 626
diff changeset
104 UARTFAX_CLASSIC_DTR_DCD to 0 on this target, disabling that code in the
b639f7ab0007 Leonardo GPIO 2 fix
Mychaela Falconia <falcon@freecalypso.org>
parents: 626
diff changeset
105 uartfax.c driver.
b639f7ab0007 Leonardo GPIO 2 fix
Mychaela Falconia <falcon@freecalypso.org>
parents: 626
diff changeset
106
634
6edd9be81b94 doc/Leonardo-target: update for Tango and Caramel
Mychaela Falconia <falcon@freecalypso.org>
parents: 630
diff changeset
107 This peculiar GPIO 2 situation applies only to real Leonardo boards, not to
6edd9be81b94 doc/Leonardo-target: update for Tango and Caramel
Mychaela Falconia <falcon@freecalypso.org>
parents: 630
diff changeset
108 Tango modems: a custom design using a Tango module can use this GPIO line for
6edd9be81b94 doc/Leonardo-target: update for Tango and Caramel
Mychaela Falconia <falcon@freecalypso.org>
parents: 630
diff changeset
109 anything, but on Caramel boards it drives RS-232 DCD like on D-Sample and thus
6edd9be81b94 doc/Leonardo-target: update for Tango and Caramel
Mychaela Falconia <falcon@freecalypso.org>
parents: 630
diff changeset
110 should be configured as a Calypso output.
6edd9be81b94 doc/Leonardo-target: update for Tango and Caramel
Mychaela Falconia <falcon@freecalypso.org>
parents: 630
diff changeset
111
630
b639f7ab0007 Leonardo GPIO 2 fix
Mychaela Falconia <falcon@freecalypso.org>
parents: 626
diff changeset
112 Other GPIO and multifunction pins
b639f7ab0007 Leonardo GPIO 2 fix
Mychaela Falconia <falcon@freecalypso.org>
parents: 626
diff changeset
113 =================================
b639f7ab0007 Leonardo GPIO 2 fix
Mychaela Falconia <falcon@freecalypso.org>
parents: 626
diff changeset
114
b639f7ab0007 Leonardo GPIO 2 fix
Mychaela Falconia <falcon@freecalypso.org>
parents: 626
diff changeset
115 Our Magnetite-Leonardo fw is unchanged from TI's TCS211 original in that GPIO0,
b639f7ab0007 Leonardo GPIO 2 fix
Mychaela Falconia <falcon@freecalypso.org>
parents: 626
diff changeset
116 TSPDI/GPIO4 and DSR_MODEM/LPG pins are left configured as inputs, even though
b639f7ab0007 Leonardo GPIO 2 fix
Mychaela Falconia <falcon@freecalypso.org>
parents: 626
diff changeset
117 the schematics we've got show GPIO0 as an output and the other two pins as
b639f7ab0007 Leonardo GPIO 2 fix
Mychaela Falconia <falcon@freecalypso.org>
parents: 626
diff changeset
118 unconnected, in which case they should also be configured as outputs in order
b639f7ab0007 Leonardo GPIO 2 fix
Mychaela Falconia <falcon@freecalypso.org>
parents: 626
diff changeset
119 to not float. We are leaving this aspect unchanged currently because this
b639f7ab0007 Leonardo GPIO 2 fix
Mychaela Falconia <falcon@freecalypso.org>
parents: 626
diff changeset
120 Magnetite-Leonardo fw build target is really just a reference for practically
b639f7ab0007 Leonardo GPIO 2 fix
Mychaela Falconia <falcon@freecalypso.org>
parents: 626
diff changeset
121 non-existent hw, and given the unknown of what other Leonardo variants may have
b639f7ab0007 Leonardo GPIO 2 fix
Mychaela Falconia <falcon@freecalypso.org>
parents: 626
diff changeset
122 existed once beyond our known schematics, we would rather leave a few floating
b639f7ab0007 Leonardo GPIO 2 fix
Mychaela Falconia <falcon@freecalypso.org>
parents: 626
diff changeset
123 inputs than risk causing a driver conflict on some unknown board.
634
6edd9be81b94 doc/Leonardo-target: update for Tango and Caramel
Mychaela Falconia <falcon@freecalypso.org>
parents: 630
diff changeset
124
6edd9be81b94 doc/Leonardo-target: update for Tango and Caramel
Mychaela Falconia <falcon@freecalypso.org>
parents: 630
diff changeset
125 In the case of Tango these 3 just-mentioned Calypso signals are contained inside
6edd9be81b94 doc/Leonardo-target: update for Tango and Caramel
Mychaela Falconia <falcon@freecalypso.org>
parents: 630
diff changeset
126 the module (not brought out), and it is currently unknown if they are simply
6edd9be81b94 doc/Leonardo-target: update for Tango and Caramel
Mychaela Falconia <falcon@freecalypso.org>
parents: 630
diff changeset
127 unconnected or if perhaps they are tied to either GND or V-IO inside the module.
6edd9be81b94 doc/Leonardo-target: update for Tango and Caramel
Mychaela Falconia <falcon@freecalypso.org>
parents: 630
diff changeset
128 The Tango manuf's original fw leaves these signals in their power-up default as
6edd9be81b94 doc/Leonardo-target: update for Tango and Caramel
Mychaela Falconia <falcon@freecalypso.org>
parents: 630
diff changeset
129 Calypso inputs, hence we do the same currently in order to not risk causing a
6edd9be81b94 doc/Leonardo-target: update for Tango and Caramel
Mychaela Falconia <falcon@freecalypso.org>
parents: 630
diff changeset
130 short. At some later time when our finances allow doing so, we may send a
6edd9be81b94 doc/Leonardo-target: update for Tango and Caramel
Mychaela Falconia <falcon@freecalypso.org>
parents: 630
diff changeset
131 sacrificial Tango module for destructive PCB reverse eng and see what is really
6edd9be81b94 doc/Leonardo-target: update for Tango and Caramel
Mychaela Falconia <falcon@freecalypso.org>
parents: 630
diff changeset
132 done with these Calypso signals - if they are really unconnected, then we can
6edd9be81b94 doc/Leonardo-target: update for Tango and Caramel
Mychaela Falconia <falcon@freecalypso.org>
parents: 630
diff changeset
133 change the code to switch them to outputs, just like we have done for the
6edd9be81b94 doc/Leonardo-target: update for Tango and Caramel
Mychaela Falconia <falcon@freecalypso.org>
parents: 630
diff changeset
134 gtamodem target where the original manuf's official fw also left a bunch of
6edd9be81b94 doc/Leonardo-target: update for Tango and Caramel
Mychaela Falconia <falcon@freecalypso.org>
parents: 630
diff changeset
135 floating inputs.