NRFX_TWIS_EVT_GENERAL_ERROR
I am thinking of implementing TWI slave functionality in the nRF52840.
The event handler is written as follows.
void twis_event_handler(nrf_drv_twis_evt_t const * p_event)
{
static bool address_received = false; // レジスタアドレスが受信されたかどうかを追跡
switch (p_event->type)
{
case NRFX_TWIS_EVT_READ_REQ:
// マスターから読み取り要求があった場合
nrf_drv_twis_tx_prepare(&m_twis, &m_twi_register[m_register_address], TWI_BUFFER_SIZE - m_register_address);
NRF_LOG_INFO("Read request: register address = 0x%02X", m_register_address);
break;
case NRFX_TWIS_EVT_WRITE_REQ:
if (!address_received) {
NRF_LOG_INFO("Preparing to receive register address...");
nrf_drv_twis_rx_prepare(&m_twis, &m_register_address, 1);
} else {
NRF_LOG_INFO("Register address received: 0x%02X", m_register_address);
if (m_register_address < TWI_BUFFER_SIZE) {
NRF_LOG_INFO("Preparing to write data to register 0x%02X", m_register_address);
nrf_drv_twis_rx_prepare(&m_twis, &m_twi_register[m_register_address], TWI_BUFFER_SIZE - m_register_address);
} else {
NRF_LOG_ERROR("Invalid register address: 0x%02X", m_register_address);
}
}
break;
case NRFX_TWIS_EVT_WRITE_DONE:
if (!address_received) {
address_received = true;
NRF_LOG_INFO("Register address 0x%02X received", m_register_address);
} else {
address_received = false;
NRF_LOG_INFO("Data written to register 0x%02X: 0x%02X", m_register_address, m_twi_register[m_register_address]);
}
break;
case NRFX_TWIS_EVT_READ_DONE:
NRF_LOG_INFO("Read completed");
break;
case NRFX_TWIS_EVT_READ_ERROR:
NRF_LOG_ERROR("TWIS EVT READ ERROR");
break;
case NRFX_TWIS_EVT_WRITE_ERROR:
NRF_LOG_ERROR("TWIS EVT WRITE ERROR");
break;
case NRFX_TWIS_EVT_GENERAL_ERROR:
NRF_LOG_ERROR("TWIS EVT GENERAL ERROR");
break;
default:
break;
}
}
Read operations from the master work fine, but write operations result in NRFX_TWIS_EVT_GENERAL_ERROR.
As a result, values cannot be written to the specified register.
What is the problem?
