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comparison doc/Calypso-version-override @ 621:0d66718e5f33

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Calypso chip version mechanism documented
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 07 Oct 2019 03:59:14 +0000
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children 9f19cc5e46e8
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620:76f09f1bea5d 621:0d66718e5f33
1 TI's TCS211 program supported 3 different Calypso silicon versions on their
2 D-Sample and Leonardo boards: C05B (CHIPSET 8, DSP 33), early C035 (CHIPSET 10,
3 DSP 34) and final C035 (CHIPSET 10, DSP 36). In FreeCalypso we generally work
4 only with the last chipset (final C035), but we would like to support the two
5 earlier ones as well, if possible. C05B has been partially exercised on the
6 Mother's D-Sample board (non-functional Clara RF, no genuine tpudrv10.c source
7 and too many unknowns), but the early C035 version with DSP 34 has not been
8 tested at all yet.
9
10 All 3 Calypso chip versions in question are footprint-compatible, i.e., they
11 can all be populated onto the same PCB. Changing between C05 and C035 requires
12 changing the VLRTC strapping on the Iota companion chip, thus not all boards
13 can support Calypso C05 (the newer ones are C035 only), but one can always
14 populate either early C035 (DSP 34) or final C035 (DSP 36) on the same PCB.
15 TI's own D-Sample and Leonardo development boards have most certainly been made
16 with all 3 Calypso silicon versions: D-Sample appears to support both C05 and
17 C035 on the same PCB; the schematics we have for Leonardo show fixed VLRTC
18 strapping for C035, but there also existed an earlier Leonardo version with
19 Calypso C05B. Our own FCDEV3B also has fixed C035-only VLRTC strapping, our
20 regular boards have final C035 chips on them, but we should be able to build
21 some experimental boards with an early C035 variant (751774) for DSP 34 testing.
22
23 In the case of target boards that can have different Calypso chip versions
24 populated on them, we want to be able to target all of them without creating a
25 configuration explosion. The implemented solution is that you can pass a target
26 argument to the ./configure.sh script of the following form:
27
28 dsample-c05b
29 dsample-dsp34
30 dsample-dsp36
31 leonardo-c05b
32 leonardo-dsp34
33 leonardo-dsp36
34 fcdev3b-dsp34
35
36 Our configure.sh script recognizes the hyphen as indicating this construct;
37 the word before the hyphen must be the conventional target name, and the word
38 after the hyphen needs to be one of c05b, dsp34 or dsp36, corresponding to the
39 three supported Calypso silicon versions.