Puya PY32F07x support

[rhgndf]

This adds support for another musb variant, py32f07x. The USB block looks like musb with a modified register layout and a lot of functions stripped out.

I'm evaluating this MCU due to it having USB support (also have DFU and is low cost). I also have HC32F460 and HC32F4A0 if anyone is interested to see a port of those.

Dev board is a generic board, no special name

[rhgndf]

adds 2 more bytes to the struct, is this ok? py32's maxp field is in increments of multiples of 8 for packet size, instead of per byte for others

[rhgndf]

A bit more specific than "1-dir ep"? Two dirs are possible with some scheduling, but probably very complex

[rhgndf]

A connect/disconnect requires enabling or disabling the entire block through the APB, doesn't look like it can disconnect the resistor by itself.

[github-actions]

MemBrowse Memory Report

Top 10 targets by memory change (%) (out of 2471 targets) View Project Dashboard →

target	.text	.rodata	.data	.bss	total	% diff
ek_tm4c123gxl/audio_test	12,280 → 12,308 (+28)	—	—	—	12,332 → 12,360 (+28)	+0.2%
ek_tm4c123gxl/audio_test_multi_rate	12,492 → 12,520 (+28)	—	—	—	12,544 → 12,572 (+28)	+0.2%
ek_tm4c123gxl/video_capture	13,480 → 13,508 (+28)	—	—	—	13,540 → 13,568 (+28)	+0.2%
ek_tm4c123gxl/usbtest	13,744 → 13,772 (+28)	—	—	—	13,776 → 13,804 (+28)	+0.2%
ek_tm4c123gxl/uac2_headset	13,804 → 13,832 (+28)	—	—	—	13,840 → 13,868 (+28)	+0.2%
msp_exp432e401y/usbtest	13,804 → 13,832 (+28)	—	—	—	14,372 → 14,400 (+28)	+0.2%
ek_tm4c123gxl/uac2_speaker_fb	14,568 → 14,596 (+28)	—	—	—	14,604 → 14,632 (+28)	+0.2%
msp_exp432e401y/audio_test	12,400 → 12,424 (+24)	—	—	—	12,988 → 13,012 (+24)	+0.2%
msp_exp432e401y/uac2_speaker_fb	14,756 → 14,784 (+28)	—	—	—	15,328 → 15,356 (+28)	+0.2%
msp_exp432e401y/audio_test_multi_rate	12,616 → 12,640 (+24)	—	—	—	13,204 → 13,228 (+24)	+0.2%

[github-actions]

Hardware-in-the-loop (HIL) Test Report

hfp.json

✅ 49 passed · ❌ 7 failed · ⚪ 0 skipped · blank not run

Board	usbtest	cdc_msc_throughput	audio_test_freertos	cdc_dual_ports	cdc_msc	cdc_msc_freertos	dfu	dfu_runtime	hid_boot_interface	hid_generic_inout	midi_test	msc_dual_lun	mtp	printer_to_cdc	duration
stm32l412nucleo	✅ 30/30	✅ C 627/388k M 846/821k	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	183s
stm32f746disco	✅ 30/30	✅ C 12.7/10.4M M 14/26.7M	✅	✅	✅	❌	✅	✅	✅	✅	✅	✅	✅	✅	144s
stm32f746disco-DMA	✅ 30/30	✅ C 12.3/10.2M M 15.8/31.4M	❌	✅	✅	✅	✅	✅	✅	✅	✅	❌	✅	✅	91s
lpcxpresso43s67	✅ 30/30	❌	✅	❌	✅	✅	✅	✅	✅	✅	✅	✅	❌	❌	185s

tinyusb-esp.json

✅ 10 passed · ❌ 14 failed · ⚪ 0 skipped · blank not run

Board	usbtest	msc_file_explorer_freertos	audio_test_freertos	cdc_msc_freertos	device_info	hid_composite_freertos	duration
espressif_p4_function_ev	❌ 0/30	409 KB/s	❌	❌	✅	✅	59s
espressif_p4_function_ev-DMA	❌ 0/30	409 KB/s	❌	❌	✅	✅	59s
espressif_s3_devkitm	❌ 0/30	❌	❌	❌	✅	✅	74s
espressif_s3_devkitm-DMA	❌ 0/30	❌	❌	❌	✅	✅	74s

tinyusb.json

✅ 20 passed · ❌ 327 failed · ⚪ 17 skipped · blank not run

Board	usbtest	cdc_msc_throughput	msc_file_explorer	msc_file_explorer_freertos	audio_test_freertos	cdc_dual_ports	cdc_msc	cdc_msc_freertos	cdc_msc_hid	device_info	dfu	dfu_runtime	hid_boot_interface	hid_generic_inout	host_info_to_device_cdc	midi_test	msc_dual_lun	mtp	printer_to_cdc	duration
frdm_k64f			⚪	⚪					✅	✅										9s
ek_tm4c123gxl	❌ 0/30	❌			❌	❌	❌	❌			❌	❌	❌	❌		❌	❌	❌	❌	143s
metro_m4_express	❌ 0/30	❌				❌	❌	❌			❌	❌	❌	❌	❌	❌	❌	❌	❌	138s
raspberry_pi_pico_w			1103 KB/s	1022 KB/s					❌	❌										46s
feather_nrf52840_express	❌ 0/30	❌			❌	❌	❌	❌			❌	❌	❌	❌		❌	❌	❌	❌	137s
raspberry_pi_pico	❌ 0/30	❌	62 KB/s	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	217s
raspberry_pi_pico2			1110 KB/s	1022 KB/s					✅	✅										15s
max32666fthr	❌ 0/30	❌			❌	❌	❌	❌			❌	❌	❌	❌		❌	❌	❌	❌	138s
adafruit_fruit_jam	❌ 0/30	❌	62 KB/s	62 KB/s	❌	❌	❌	❌	✅	✅	❌	❌	❌	❌	❌	❌	❌	❌	❌	184s
lpcxpresso11u37	❌ 0/30	❌			❌	❌	❌	❌			❌	❌	❌	❌		❌	❌	❌	❌	144s
stm32f072disco	❌ 0/30	❌			❌	❌	❌	❌			❌	❌	❌	❌		❌	❌	❌	❌	145s
ra4m1_ek	❌ 0/30	❌			⚪	❌	❌	⚪			❌	❌	❌	❌		❌	❌	❌	❌	125s
stm32f407disco	❌ 0/30	❌			❌	⚪	❌	❌			❌	❌	❌	❌		❌	❌	❌	❌	130s
stm32f723disco	❌ 0/30	❌	18078 KB/s	4096 KB/s	❌	❌	❌	❌	❌	✅	❌	❌	❌	❌		❌	❌	❌	❌	163s
stm32f723disco-DMA	❌ 0/30	❌	18724 KB/s	4032 KB/s	❌	❌	❌	❌	✅	✅	❌	❌	❌	❌		❌	❌	❌	❌	157s
stm32h743nucleo	❌ 0/30	❌			❌	❌	❌	❌			❌	❌	❌	❌		❌	❌	❌	❌	134s
stm32h743nucleo-DMA	❌ 0/30	❌			❌	❌	❌	❌			❌	❌	❌	❌		❌	❌	❌	❌	134s
nrf5340dk	❌ 0/30	❌				❌	❌				❌	❌	❌	❌		❌	❌	❌	❌	121s
stm32g0b1nucleo	❌ 0/30	❌			❌	❌	❌	❌			❌	❌	❌	❌		❌	❌	❌	❌	124s
stm32l476disco	❌ 0/30	❌			❌	❌	❌	❌			❌	❌	❌	❌		❌	❌	❌	❌	140s
stm32u083nucleo	❌ 0/30	❌			❌	❌	❌	❌			❌	❌	❌	❌		❌	❌	❌	❌	129s
nanoch32v203-fsdev	❌ 0/30	❌			⚪	❌	❌	⚪			❌	❌	❌	❌		❌	❌	❌	❌	104s
nanoch32v203-usbfs	❌ 0/30	❌			⚪	❌	❌	⚪			❌	❌	❌	❌		❌	❌	❌	❌	103s
ch32v103r_r1_1v0	❌ 0/30	❌			⚪	❌	❌	⚪			❌	❌	❌	❌		❌	❌	❌	❌	140s
ch32v307v_r1_1v0-usbhs	❌ 0/30	❌			⚪	❌	❌	⚪			❌	❌	❌	❌		❌	❌	❌	❌	126s
ch32v307v_r1_1v0-usbfs	❌ 0/30	❌			⚪	❌	❌	⚪			❌	❌	❌	❌		❌	❌	❌	❌	125s
ch582m_evt	❌ 0/30	❌			⚪	❌	❌	⚪			❌	❌	❌	❌		❌	❌	❌	❌	130s

[ImproperCatGirl]

Great job! Also tested to work on PY32F403 (tested: HID and CDC-ACM) with almost no change.

[rhgndf]

Great job! Also tested to work on PY32F403 (tested: HID and CDC-ACM) with almost no change.

mind adding the setup that you have for f403? Both the bsp and dcd changes

[ImproperCatGirl]

Great job! Also tested to work on PY32F403 (tested: HID and CDC-ACM) with almost no change.

mind adding the setup that you have for f403? Both the bsp and dcd changes

Basically nothing, it's register compatible. DCD no change (though you can utilize the 8 (instead of 6) endpoints through minor changes), BSP solely enabled the clock. https://github.com/ImproperCatGirl/PY32F403_USB/

[HiFiPhile]

Thank you, from Codex:

• [P1] PY32 builds fail under -Werror — [dcd_musb.c:240](https://github.com/hathach/tinyusb/blob/61e6e7c3f2239685cdcfbe0fd666541632c67a56/src/portable/mentor/musb/dcd_musb.c#L240-L241) declares py32_fifo_size, but its only use is commented out. Every PY32 example fails with unused-variable. Restoring the commented TU_VERIFY also prevents unsupported packet sizes from overflowing fixed FIFOs.

• [P2] cdc_msc_freertos exceeds the board’s RAM — [board.cmake:8](https://github.com/hathach/tinyusb/blob/61e6e7c3f2239685cdcfbe0fd666541632c67a56/hw/bsp/py32f0/boards/py32f071_dev_board/board.cmake#L8) and [board.mk:5](https://github.com/hathach/tinyusb/blob/61e6e7c3f2239685cdcfbe0fd666541632c67a56/hw/bsp/py32f0/boards/py32f071_dev_board/board.mk#L5) omit CFG_EXAMPLE_MSC_READONLY. The example overflows 16 KiB RAM by 552 bytes. Add the flag to both build systems or skip the example.

[rhgndf]

* **[P1] PY32 builds fail under `-Werror`**

fixed by commenting out the line. Should we put in a TU_ASSERT if the ep size exceeds what the hardware can handle?

* **[P2] `cdc_msc_freertos` exceeds the board’s RAM**

fixed

also have rebased the branch

[HiFiPhile]

fixed by commenting out the line. Should we put in a TU_ASSERT if the ep size exceeds what the hardware can handle?

We can let hwfifo_config return false as assert is already in dcd_edpt_open, also add assert to dcd_edpt_iso_alloc.