CKS32: Add support for CKS32F103C8T6

[vzasukhin]

CS32F103C8T6 is clone of STM32F103C8T6 but with incorrect core_id number. ( #757 )

All original STM32F1xx has core id STM32VL_CORE_ID, but CS32F103 has different core id 0x2BA01477 (as original STM32F3xx, STM32F4xx and STM32L1xx).

This commit should not affect other devices because all original STM32F1xx (include STLINK_CHIPID_STM32_F1_MEDIUM) has core id STM32VL_CORE_ID.

[NavinF]

I successfully flashed my CS32F103C8T6 after applying this PR, so it fixes #756.

All the new Blue Pill boards use this chip instead of the STM32 so I hope this is merged soon. For now, here's how I used it with the Arduino IDE:

git clone https://github.com/texane/stlink.git
cd stlink/
git fetch origin pull/805/head:805
git checkout 805
make release
sudo mount -o bind /home/navin/stlink/build/Release/ /home/navin/.arduino15/packages/STM32/tools/STM32Tools/1.2.1/tools/linux64/stlink

[xor-gate]

Sorry for the late reply! Looks good to me

[eugenesia]

Thanks @NavinF for this patch, have tested the latest version of stlink (which includes this patch) with my CS32 clone MCU and it works.

I compiled the latest version on the master branch v1.5.1-31-g625f4cd, commit 625f4cd5.

Successful flash to CS32 MCU:

$ st-flash --version
v1.5.1-31-g625f4cd

$ st-info --probe
Found 1 stlink programmers
 serial: 563f6f06513f52481953253f
openocd: "\x56\x3f\x6f\x06\x51\x3f\x52\x48\x19\x53\x25\x3f"
  flash: 0 (pagesize: 1024)
   sram: 20480
 chipid: 0x0410
  descr: F1 Medium-density device

$ st-flash write generic_boot20_pc13.bin 0x8000000
st-flash 1.5.1-31-g625f4cd
2019-07-27T18:43:38 INFO usb.c: -- exit_dfu_mode
2019-07-27T18:43:38 INFO common.c: Loading device parameters....
2019-07-27T18:43:38 INFO common.c: Device connected is: F1 Medium-density device, id 0x20036410
2019-07-27T18:43:38 INFO common.c: SRAM size: 0x5000 bytes (20 KiB), Flash: 0x20000 bytes (128 KiB) in pages of 1024 bytes
2019-07-27T18:43:38 INFO common.c: Attempting to write 21140 (0x5294) bytes to stm32 address: 134217728 (0x8000000)
Flash page at addr: 0x08005000 erased
2019-07-27T18:43:38 INFO common.c: Finished erasing 21 pages of 1024 (0x400) bytes
2019-07-27T18:43:38 INFO common.c: Starting Flash write for VL/F0/F3/F1_XL core id
2019-07-27T18:43:38 INFO flash_loader.c: Successfully loaded flash loader in sram
 21/21 pages written
2019-07-27T18:43:39 INFO common.c: Starting verification of write complete
2019-07-27T18:43:39 INFO common.c: Flash written and verified! jolly good!

I encountered other connection issues with the CS32 Blue Pill clone and have documented some fixes on my blog: http://eugenesia.co.uk/2019/07/cs32-blue-pill-clone-connection-problems/