Note: The JLink-OB hardware base on STM32F103C8T6.
- MCU: STM32F103C8
- Debug Interface: SWD (TMS, TCK, nRESET, GND)
- No Support JTAG interface mode
- No Support SWO UART
- No Support Virtual UART
Note: Because of only support SWD mode, so JTAG's TDI, TDO, nTRST pins are unused.
| SWD Interface | STM32F103C8 Pin |
|---|---|
| SWDIO/TMS | PA4 |
| SWCLK/TCK | PA3 |
| nRESET | PA2 |
| GND | GND |
| 5V or 3.3V (optional) | 5V or 3.3V |
Note: If need support JTAG interface mode, only edit MAIN/DAP_config.h file:
/// Indicate that JTAG communication mode is available at the Debug Port.
/// This information is returned by the command \ref DAP_Info as part of <b>Capabilities</b>.
#define DAP_JTAG 0 ///< JTAG Mode: 1 = available, 0 = not available.| JTAG Interface | STM32F103C8 Pin |
|---|---|
| TMS | PA4 |
| TCK | PA3 |
| nRESET | PA2 |
| nTRST | PA8 |
| TDO | PA6 |
| TDI | PB0 |
| GND | GND |
| 5V | 5V |
| 3.3V | 3.3V |
For support MCUXproessIDE, the USB VID, PID and PRODUCT STRING must be modifed:
// usbd_desc.c
#define USBD_LANGID_STRING 0x0409
#define USBD_VID 0x0D28
#define USBD_PID_FS 0x0204
#define USBD_PRODUCT_STRING_FS "JLinkOB CMSIS-DAP"and also need to modify the probetable.csv file, it localed at MCUXpressoIDE_intalled_dir\ide\plugins\com.nxp.mcuxpresso.tools.bin.win32_11.5.1.202204071413\binaries\Scripts:
// probetable.csv
0x0D28, 0x0019, 64, 1, 0, 0, 0, "", 0x0000, -1, -1
//0x0D28, 0x0204, 64, 1, 0, 0, 0, "", 0x0000, -1, -1
0x0D28, 0x0204, 64, 1, 1, 0, 0, "", 0x0000, 3, -1as above, we must add a be commented new entry to above at VID and PID is 0x0D28, 0x0204 line, then the MCUXproessIDE can identify the our custom CMSIS-Link.