projects / sigrok-dumps.git / blame
| Commit | Line | Data |
|---|---|---|
| 928b5d63 AG |
1 | ------------------------------------------------------------------------------- |
| 2 | SWD | |
| 3 | ------------------------------------------------------------------------------- | |
| 4 | ||
| 5 | This is a set of example captures of the ARM SWD (version 1) protocol. | |
| 6 | ||
| 7 | Details: | |
| 8 | http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ihi0031c/index.html | |
| 5ed6b039 | 9 | (registration required) |
| 928b5d63 AG |
10 | |
| 11 | ||
| 12 | Logic analyzer setup | |
| 13 | -------------------- | |
| 14 | ||
| 15 | Probe SWD | |
| 16 | --------------- | |
| 17 | 0 swclk | |
| 18 | 1 swdio | |
| 19 | ||
| 20 | ||
| 21 | Data | |
| 22 | ---- | |
| 23 | ||
| 24 | Different SWD sessions showing different types of behaviour: | |
| 25 | ||
| 928b5d63 AG |
26 | * stlink_openocd/ |
| 27 | ||
| 28 | Using an STLINK-V2 adapter via OpenOCD 0.9.0 development | |
| 29 | version. Device under test is a Nordic nRF51822. | |
| 30 | ||
| 31 | Command line: | |
| 32 | ||
| 33 | $ openocd -f interface/stlink-v2.cfg -c 'transport select hla_swd' \ | |
| 34 | -f target/nrf51.cfg | |
| 35 | ||
| 36 | ** stlink_openocd/init.sr | |
| 37 | Intiliasing device, IDCODE read, etc. | |
| 38 | OpenOCD args: -c "init; exit" | |
| 39 | ||
| 40 | ** stlink_openocd/init_write_0xabbabeeb.sr | |
| 41 | Initialise, write 20 bytes of 0xabbabeeb at start of RAM. | |
| 42 | OpenOCD args: -c "init; halt; mww 0x20000000 0xabbabeeb 20; exit" | |
| 43 | ||
| 44 | ** stlink_openocd/wait_retry.sr | |
| 45 | Capture showing an SWD WAIT with overrun mode not enabled (in contrast to | |
| 46 | ftdi_openocd/wait_retry.sr), adapter immediately retries and gets an OK | |
| 47 | response. | |
| 48 | ||
| 49 | For this capture OpenOCD was patched with this change (known to induce | |
| 50 | SWD WAITs): http://openocd.zylin.com/#/c/2204/ | |
| 51 | ||
| 52 | OpenOCD args: -c "init; reset halt; flash fillw 0 0xabbabeeb 2048; exit" | |
| 53 |