| .. zephyr:code-sample:: cmsis-dap |
| :name: CMSIS-DAP |
| |
| Implement a custom CMSIS-DAP controller using SWDP interface driver. |
| |
| Overview |
| ******** |
| |
| This sample app demonstrates use of a SWDP interface driver and CMSIS DAP |
| controller through USB Bulk interface. |
| |
| Requirements |
| ************ |
| |
| This sample supports multiple hardware configurations: |
| |
| The simplest configuration would be to connect ``SWDIO`` to ``dio``, ``SWDCLK`` to ``clk`` |
| and optionally ``nRESET`` to ``reset``. The optional ``noe`` pin is used to enable the port, |
| e.g. if the SWD connections are multiplexed. |
| |
| Building and Running |
| ******************** |
| |
| In order for our debug adapter to be recognized by pyOCD we need to change |
| Zephyr's VID/PID to IDs known to pyOCD, this is up to the user. |
| The following commands build and flash DAP sample. |
| |
| .. zephyr-app-commands:: |
| :zephyr-app: samples/subsys/dap |
| :board: nrf52840dk_nrf52840 |
| :goals: flash |
| :compact: |
| |
| Connect HIC to the target and try some pyOCD commands, for example: |
| |
| .. code-block:: console |
| |
| pyocd commander -t nrf52840 |
| |
| 0029527 W Board ID FE5D is not recognized [mbed_board] |
| Connected to NRF52840 [Sleeping]: FE5D244DFE1F33DB |
| pyocd> read32 0x20004f18 32 |
| 20004f18: 20001160 2000244c 00000000 0000e407 | ..` .$L........| |
| 20004f28: ffffffff ffffffff 00000000 aaaaaaaa |................| |
| pyocd> halt |
| Successfully halted device |
| pyocd> reg |
| general registers: |
| lr: 0x00009cdd r7: 0x00000000 (0) |
| pc: 0x000033ca r8: 0x00000000 (0) |
| r0: 0x00000000 (0) r9: 0x00000000 (0) |
| r1: 0x20002854 (536881236) r10: 0x00000000 (0) |
| r2: 0x20000be4 (536873956) r11: 0x00000000 (0) |
| r3: 0x00000000 (0) r12: 0x00000000 (0) |
| r4: 0x200017e8 (536877032) sp: 0x20002898 |
| r5: 0x20001867 (536877159) xpsr: 0x61000000 (1627389952) |
| r6: 0x00000000 (0) |
