README.md

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1 # Replacement front panel for the HP/Agilent 34970A - firmware
2
3 This repository contains the firmware for the replacement front panel for the
4 HP 34970A acuisition unit described
5 [here](https://whatever.sdfa3.org/hp-34970a-data-acquisition-unit-part-5.html)
6
7 It is based on the [Mbed-os](https://os.mbed.com) framework and uses the
8 [platformio](https://platformio.org/) development environment.
9
10 Make sure to have this later properly installed (I suggest you install it in a
11 Python 3 virtualenv).
12
13 The firmware has been developped using platformio version 5.0.3 and Mbed-os 6.2.
14
15 ## Compilation
16
17 It should be a simple matter of calling:
18
19 ```
20 (pio3) ~/p/p/hp34970disp$ pio run -e fp_dfu
21 [...]
22 Advanced Memory Usage is available via "PlatformIO Home > Project Inspect"
23 RAM: [== ] 21.4% (used 14048 bytes from 65536 bytes)
24 Flash: [== ] 22.9% (used 90040 bytes from 393216 bytes)
25 ========================================== [SUCCESS] Took 28.13 seconds ==========================================
26
27 Environment Status Duration
28 ------------- -------- ------------
29 fp_dfu SUCCESS 00:00:28.129
30 ========================================== 1 succeeded in 00:00:28.129 ==========================================
31
32 ```
33
34 Note: the `platformio.ini` provides 2 similar environments (`fp_dfu` and
35 `fp_stlink`) which are identical but the `upload_protocol`.
36
37 ## Uploading the firmware
38
39 You can upload the firmware either via the (USB) DFU mode or the SWD/STLink
40 port on the PCB. Note that the USB socket on the PCB does not power the board,
41 so it must be already powered (which is typically when the board is connected
42 to the main CPU board of the HP 34970A).
43
44 In order to be able to upload the firware by DFU, the STM32 MCU on the front
45 panel must be booted in DFU mode, which can be done by pressing the DFU button,
46 then the RESET button while keeping the DFU pressed.
47
48 The STLink upload method does not need the board o be booted in DFU mode.
49
50 ```
51 (pio3) ~/p/p/hp34970disp$ pio run -e fp_dfu -t upload
52 ```
53
54 or
55
56 ```
57 (pio3) ~/p/p/hp34970disp$ pio run -e fp_stlink -t upload
58 ```
59
60 ## Credits
61
62 THis firmware uses a modified version of the [UniGraphic]() library and the
63 [QEI]() library.
64
65
66 ## Notes (deprecated)
67
68 Use mbed 6
69
70 For some reason I had to disable mbed-client-cli/ (multiple definition of `cmd' error at
71 link time).
72 Put a .mbedignore file in:
73
74 $ cd /home/david/.platformio/packages/framework-mbed@6.51504.200716/features
75 $ cat .mbedignore
76 mbed-client-cli/*
77 frameworks/mbed-client-cli/*
78
79 see https://docs.platformio.org/en/latest/frameworks/mbed.html#ignoring-particular-components

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