High-Speed CMSIS-DAP for STLINK-V3MINI ARM Debugger

Keywords: USB2.0 High-Speed CMSIS-DAP STLINK-V3 STM32F723IEK6 SWO VCP CDC DAPLink ST-LINK ARM-Debugger

ST company created a great mini-size ARM debugger STLINK-V3MINI for STM32 MCU, cost you ~US$10 only. Re-Use the high-performance PCBA hardware, you can do more interesting projects or hobbies.

A new very good/low-cost Starter Kit ...... what we got:

• MCU: STM32F723IEK6, Arm® Cortex®-M7 32b MCU+FPU, 462DMIPS.
• Core speed: 216MHz
• ROM: 512KB
• RAM: 256+16+4KB, new features.
• USB 2.0 High-Speed internal PHY.
• GPIO, up to 30s connected out in STLINK-V3MINI PCBA.
• UART, SPI, I2C, CAN, ADC, more...
• some GPIO with ESD protection.
• On-board LEDs.

My code:

• /STLINKv3DAPv1_HID+VCP ------- native HID+VCP mode, CMSIS-DAP v1, VCP(CDC) added.
• /STLINKv3DAPv2_WinUSB --------- native WinUSB mode, CMSIS-DAP v2, SWO_STREAM mode enabled.
• /STLINKv3DAPv2_WinUSB+VCP --- WinUSB+VCP, SWO_STREAM mode cannot enable.
• /STLINKv3DAP_v1+v2 -------------- v1+v2, no VCP, SWO_STREAM mode cannot enable.

All support SWD and JTAG mode. SWO_STREAM mode is important or not? please tell me.

v1+v2, HID and WinUSB mode coexisted, suggest disable one in Device Manager force to another.

The STDC14 connector pin definations:

• Pin-1, NC.
• Pin-2, NC.
• *Pin-3, 3.3V out, re-wire to STLINK 3.3V LDO output, limited less than 50mA.
• Pin-4, JTMS / SWDIO.
• Pin-5, GND.
• Pin-6, JTCK / SWCLK (same as Pin-9) .
• Pin-7, GND.
• Pin-8, JTDO / SWO.
• Pin-9, JTCK / SWCLK (same as Pin-6) .
• Pin-10, JTDI.
• *Pin-11, NC (GND Detect on STLINK, to target GND for ST-LINK).
• *Pin-12, nRESET (T-NRST on STLINK), to JTAG/SWD nRESET pin, or board /RESET.
• Pin-13, VCP Tx.
• Pin-14, VCP Rx.

*---Not same as STLINK-V3MINI original.

Compile Environment:

• Keil: v5.28a.
• STM32F7xx_DFP 2.12.0.
• Keil: ARM CMSIS 5.6.0.
• Keil: MDK-Middleware 7.10.0.
• Keil: ARM Compiler 6 (AC6 + MicroLIB, Optimization[-Ofast]).

Include Path:

• C:\Keil\ARM\PACK\ARM\CMSIS\5.6.0\CMSIS\Include - maybe not same as yours.
• C:\Keil\ARM\PACK\ARM\CMSIS\5.6.0\CMSIS\Driver\Include - maybe not same as yours.
• .\CMSIS-DAP
• .\RTE\USB
• .\USER

Some issues:

1. not well-tested, need your report.
2. Stack uasge check and optimize, not performed.
3. ......

Further improvements:

1. General USB-DFU bootloader, support drag&drop easy update any user App, need your help.
2. Try using other USB library to see what happened.
3. Develop SPI/I2C/CAN bus, Logic analyzer/emulator functions, we have a large flash room.
4. ......

New Release Notes:

• 2019-12-22, improved SWD clock, max 18MHz (Keil - 10MHz). USB VID changed to ST VID=0x0483 for all. The USB PID as following:
  • STLINKv3DAPv1_HID+VCP -------- PID 0x572C
  • STLINKv3DAPv2_WinUSB+VCP --- PID 0x572D
  • STLINKv3DAPv2_WinUSB ---------- PID 0x572E
  • STLINKv3DAP_v1+v2 -------------- PID 0x572F
  • My STM32F103C8T6 project ------ PID 0x572A (STM32F103C8T6_CMSIS-DAP_SWO)

Important Warning:

---

The original STLINK-V3 device Firmware has been protected by ST company. Any normal methods, to try to read-back/program the original Flash ROM, will trigger a mass ERASE of the internal flash. This could cause your STLINK-V3 function total lost permanently, and cannot recover the factory firmware by yourself. When you decided to program the STLINK-V3MINI flash, it means the device will be no longer STLINK-V3MINI any more.