Used to enable polling of locations in memory on an AVR target device. Up to 200 locations can be added to the sampling service, but performance will of course degrade as more locations are added. Only AVR devices with UPDI have this capability.
The command will return a handle, which should be used when disabling the polling function afterwards.
| Field | Size | Description |
|---|---|---|
| DATA_SAMPLER | 1 byte | 0x8A |
| AVR_DATA_ENABLE | 1 byte | 0x0B |
| START_ADDRESS | 4 byte |
Start address to poll, MSB first. Must be in the range 0x2000 to 0x3FFF. |
| LENGTH | 4 byte |
Number of bytes to poll, MSB first. Must be set to 1. |
| FLAGS | 4 byte |
Bits 1:0: destination:
|
Response:
| Field | Size | Description |
|---|---|---|
| DATA_SAMPLER | 1 byte | 0x8A |
| AVR_DATA_ENABLE | 1 byte | 0x0B |
| Status | 1 byte |
Status code 0x00: OK 0xFF: Error |
| Handle / error code | 1 byte |
Sampler handle is returned if Status is OK. Error code is returned if Status is Error. |
Error codes:
| Error code | Value | Description |
|---|---|---|
| ERROR_FULL | 0x92 | Too many poll locations are enabled |
| ERROR_SIZE_EXCEEDED | 0x94 | Buffer memory is full |
| ERROR_OUT_OF_RANGE | 0x91 | The poll location specified is not allowed |