FreeCalypso > hg > fc-small-hw

annotate mmtb1/README @ 71:31c8b1291b4a

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
lunalcd3 project started
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 18 Nov 2021 04:59:47 +0000
parents 0f9bdd60ce50
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
0
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 MMTB1 is a Modem Module Test Board intended for testing and exercising Huawei
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
2 GTM900 and FreeCalypso FCM40 modem modules. Specifically, the following two
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
3 usages are envisioned:
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
4
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5 1) When MMTB1 is first built, it will be used with GTM900-B and possibly with
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
6 GTM900-P modules. MMTB1 will allow the combination of FC firmware on GTM900
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7 hw to be exercised properly, and then the combination of MMTB1+GTM900 can be
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8 officially recommended to community members seeking to play with FreeCalypso
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9 fw.
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11 2) When FCM40 gets built much later, MMTB1 will be used for production testing
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12 and bring-up of first FCM40 modules. MMTB1 is more GTM900-oriented and
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13 therefore won't be ideal for exercising FCM40 modules, but it will be
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14 sufficient for basic bring-up, missing only microphone and MCSI interfaces.
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
15 Once that milestone is passed, a new MMTB version will be created
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
16 specifically for FCM40 functional demonstration.
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
17
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
18 MMTB1 is going to break out the FPC interface of GTM900 as follows:
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
19
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
20 * The power input connector will be the same as on FCDEV3B.
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
22 * The two Calypso UARTs will be brought out to a 10-pin header in the same
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
23 pinout as on FCDEV3B, with GPIOs 2 & 3 (DCD and DTR) brought to the two pins
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
24 which are unused and unconnected on FCDEV3B.
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
25
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
26 * PWON and RESET pushbuttons will be provided on MMTB1 just like on FCDEV3B, as
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
27 well as a green power-on LED. The LED will be controlled by the Vio output
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
28 coming out of the modem module, but without loading the Vio rail itself,
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
29 using raw VBAT and the same MOSFET circuit as on FCDEV3B.
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
30
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
31 * There will be a SIM socket on the MMTB1 itself.
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
32
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
33 * There will be two 2-pin headers for analog audio, one for the earpiece
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
34 speaker and one for the microphone, connected to the corresponding GTM900
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
35 interface pins.
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
36
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
37 The following GTM900 interfaces will NOT be brought out or exercised in any way:
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
38
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
39 * ADIN1 (general-purpose ADC) connection on pin 14;
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
40 * GPIO1 connection (DSR output) on pin 16;
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
41 * GPIO0 connection (RI output) on pin 17;
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
42 * Vbackup connection on pin 30;
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
43 * LPG output on pin 32;
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
44 * AUXO secondary audio output on pins 33 & 34;
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
45 * AUXI secondary audio input on pins 39 & 40.
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
46
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
47 These interfaces have been omitted because they are not essential for the
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
48 intended application of exercising FreeCalypso fw on GTM900 hw, because I am
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
49 lazy (not interested in doing more PCB layout work than I have to) and because
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
50 I couldn't find a suitable MOSFET to implement another LED circuit for LPG.
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
51
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
52 No pull-up or pull-down resistors are provided on UART inputs to the Calypso,
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
53 including GPIO3 serving as the DTR input: I will always have all of the UART
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
54 signals connected to an FT2232x dual UART adapter (PLDkit FT2232C/D breakout
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
55 boards at first, then later our own DUART28) by way of a custom-crimped cable
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
56 that mates with the 10-pin header as a solid piece, leaving no possibility of
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
57 any UART signals being left unconnected. If anyone does not like this
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
58 arrangement, feel free to make your own alternative GTM900 breakout/interface
0f9bdd60ce50 fc-small-hw separated from old freecalypso-schem repo
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
59 board.