Created
March 10, 2019 16:44
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Notes on ARMv7 Debug access ports
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| // An AP has max 64 words | |
| // Bits 3:2 (the X in 0b????XX00) of the address are sent within the command, i.e. "SWDReadAP 3" = read from 0b????1100 | |
| // Bits 7:4 (the X in 0bXXXX??00) of the address are set in the SELECT register, i.e. "SWDWriteDP 2 0x??0000F?" = read from 0b1111??00 | |
| // The AHB-AP is on APSEL = 0 | |
| // The AAP is on APSEL = 255 | |
| // APSEL is the MSB of the SELECT register, i.e. "SWDWriteDP 2 0xFF0000?0" = set APSEL to 255 | |
| // Read the AP IDR | |
| SWDWriteDP 2 0xFF0000F0 | |
| SWDReadAP 3 | |
| SWDReadDP 3 | |
| // Calc CRC of the flash page at 0x00101000 | |
| SWDWriteDP 2 0xFF000010 | |
| SWDWriteAP 2 0x00101000 | |
| SWDWriteDP 2 0xFF000010 | |
| SWDWriteAP 0 0x00000001 | |
| SWDWriteDP 2 0xFF000010 | |
| SWDReadAP 1 | |
| SWDReadDP 3 | |
| Sleep 1000 | |
| SWDWriteDP 2 0xFF000010 | |
| SWDReadAP 3 | |
| SWDReadDP 3 |
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