Hello Nordic Support Team,
I’m working with an nRF5340 using nRF Connect SDK 3.0.2.
I am trying to use the NFC pins (P0.02 and P0.03) as an I2C slave interface. However, when I use these pins, the I2C master never receives a valid NACK from my slave device. If I change to other pins, the communication works correctly.
My I2C TWIS driver source code, .conf file, and .overlay file are attached to this ticket.
How can I resolve this issue? My current hardware is routed to use the NFC pins.
Thanks in advance.
Best regards.
/** * @file i2cDrv.c * @author Luis Maciel ([email protected]) * @brief * @version x.x.x * @date 2025-02-13 * * @copyright Copyright LogPyx S/A (c) 2025 * * _ * | | ___ __ _ _ __ _ ___ __ * | | / _ \ / _` | '_ \| | | \ \/ / * | |__| (_) | (_| | |_) | |_| |> < * |_____\___/ \__, | .__/ \__, /_/\_\ * |__|_| |___/ * * Logpyx S/A */ #include <zephyr/kernel.h> #include <zephyr/types.h> #include <zephyr/device.h> #include <zephyr/drivers/i2c.h> #include <zephyr/logging/log.h> #include <zephyr/devicetree/pinctrl.h> #include <nrfx_twis.h> #include "i2cDrv.h" LOG_MODULE_REGISTER(i2cDrv, LOG_LEVEL_INF); #define I2C_SLAVE 1 #if I2C_SLAVE #define TWI_INSTANCE_ID 2 #define I2C2_NODE DT_NODELABEL(i2c2) #define I2C2_ADDRESS 0x11 static const nrfx_twis_t s_twi = NRFX_TWIS_INSTANCE(TWI_INSTANCE_ID); static i2cIrqHandler rxDone; static void twis_event_handler(nrfx_twis_evt_t const *const p_event); #else static const struct i2c_dt_spec dev_i2c; // = I2C_DT_SPEC_GET(DT_ALIAS(myesp)); #endif uint8_t rx_buf[TWI_RX_BUF_LEN]; void i2cDrvIn(uint8_t *txBuffer, uint16_t size) { #if I2C_SLAVE nrfx_twis_tx_prepare(&s_twi, txBuffer, size); #else i2c_write_dt(&dev_i2c, txBuffer, size); #endif } void i2cDrvInOut(uint8_t *txBuffer, uint16_t txSize, uint8_t *rxBuffer, uint16_t rxSize) { #if !I2C_SLAVE i2c_write_read_dt(&dev_i2c, txBuffer, txSize, rxBuffer, rxSize); #endif } void i2cDrvOut(uint8_t *rxBuffer, uint16_t size) { ARG_UNUSED(rxBuffer); ARG_UNUSED(size); } bool i2cDrvIsWaiting4Tx(void) { #if I2C_SLAVE return nrfx_twis_is_waiting_tx_buff(&s_twi); #endif return false; } void i2cDrvInit(i2cIrqHandler cb) { #if I2C_SLAVE IRQ_CONNECT(DT_IRQN(I2C2_NODE), DT_IRQ(I2C2_NODE, priority), nrfx_isr, nrfx_twis_2_irq_handler, 0); nrfx_twis_config_t twis_config = NRFX_TWIS_DEFAULT_CONFIG(30, 3, I2C2_ADDRESS); nrfx_twis_init(&s_twi, &twis_config, twis_event_handler); nrfx_twis_enable(&s_twi); rxDone = cb; #else while (!i2c_is_ready_dt(&dev_i2c)) { k_msleep(1); } #endif } #if I2C_SLAVE static void twis_event_handler(nrfx_twis_evt_t const *const p_event) { switch (p_event->type) { case NRFX_TWIS_EVT_READ_REQ: if (p_event->data.buf_req) { // Sending default message static uint8_t default_msg[] = {0x01, 0x02, 0x03}; nrfx_twis_tx_prepare(&s_twi, default_msg, sizeof(default_msg)); // LOG_INF("Send default value to master"); } break; case NRFX_TWIS_EVT_READ_DONE: // LOG_INF("Master terminou leitura."); break; case NRFX_TWIS_EVT_WRITE_REQ: if (p_event->data.buf_req) { // preparar buffer para receber // LOG_INF("Request to receive bytes from master", TWI_RX_BUF_LEN); nrfx_twis_rx_prepare(&s_twi, rx_buf, TWI_RX_BUF_LEN); } break; case NRFX_TWIS_EVT_WRITE_DONE: { // terminou de receber dados do master // LOG_INF("I2C Slave recebeu %d bytes:", p_event->data.rx_amount); // LOG_HEXDUMP_INF(rx_buf, p_event->data.rx_amount, "RX DATA"); if (rxDone) { rxDone(rx_buf, p_event->data.rx_amount); } break; } case NRFX_TWIS_EVT_READ_ERROR: case NRFX_TWIS_EVT_WRITE_ERROR: case NRFX_TWIS_EVT_GENERAL_ERROR: break; default: break; } } #endif
