Hi,
I'm trying to connect an NRF52840-DK to a MAX30101 Wing board via I2C/TWI. I've set up the TWI Manager to send a message asking the MAX board for its part ID.
static uint8_t buffer[BUFFER_SIZE];
ret_code_t read_part_id(nrf_twi_mngr_t const * twi_mngr){
// Read part ID
// Read register 0xFF
ret_code_t error;
//static uint8_t buffer[BUFFER_SIZE];
static nrf_twi_mngr_transfer_t const transfers[] =
{
NRF_TWI_MNGR_READ(MAX_ADDR_READ, &buffer[0], 1, 0)
};
static nrf_twi_mngr_transaction_t transaction =
{
.callback = validate_part_id,
.p_user_data = &buffer[0],
.p_transfers = transfers,
.number_of_transfers = sizeof(transfers) / sizeof(transfers[0]),
.p_required_twi_cfg = NULL
};
error = nrf_twi_mngr_schedule(twi_mngr, &transaction);
printf("Transaction queued\n");
return error;
};
static void validate_part_id(ret_code_t result, void * p_user_data){
if (result != NRF_SUCCESS){
printf("Transaction failed\n");
printf("0x%p\n", p_user_data);
uint8_t temp = *(uint8_t*)p_user_data;
printf("%d\n", temp);
printf("read_max10_registers_cb - error: %d\n", (int)result);
} else {
printf("Transaction succeded\n");
}
};
This is the output of the callback function:
Transaction failed 0x20001540 0 read_max10_registers_cb - error: 3
I've had a look and error code 3 is a generic internal error. Does anyone know how to fix this?
PS, I'm developing Segger EM on a Ubuntu Linux computer with SDK version 17.0.2
