// this function waits the end of a tx transfer and return the status of the transaction:
// 0: OK ack received
// 1: OK ack not received
// 2: failure
static int i2c_wait_end_tx_transfer(i2c_t *obj) {
// wait for the interrupt flag
if (timeout_status_poll(obj, I2C_S_IICIF_MASK)) {
return 2;
}
i2c_hal_clear_interrupt(obj->instance);
// wait transfer complete
if (timeout_status_poll(obj, I2C_S_TCF_MASK)) {
return 2;
}
// check if we received the ACK or not
return i2c_hal_get_receive_ack(obj->instance) ? 0 : 1;
}
// this function waits the end of a tx transfer and return the status of the transaction:
// 0: OK ack received
// 1: OK ack not received
// 2: failure
static int i2c_wait_end_tx_transfer(i2c_t *obj) {
// wait for the interrupt flag
if (timeout_status_poll(obj, I2C_S_IICIF_MASK)) {
return 2;
}
obj->i2c->S |= I2C_S_IICIF_MASK;
// wait transfer complete
if (timeout_status_poll(obj, I2C_S_TCF_MASK)) {
return 2;
}
// check if we received the ACK or not
return obj->i2c->S & I2C_S_RXAK_MASK ? 1 : 0;
}
// this function waits the end of a tx transfer and return the status of the transaction:
// 0: OK ack received
// 1: OK ack not received
// 2: failure
static int i2c_wait_end_tx_transfer(i2c_t *obj) {
// wait for the interrupt flag
uint32_t i2c_addrs[] = I2C_BASE_ADDRS;
if (timeout_status_poll(obj, kI2CInterruptPending)) {
return 2;
}
I2C_HAL_ClearInt(i2c_addrs[obj->instance]);
// wait transfer complete
if (timeout_status_poll(obj, kI2CTransferComplete)) {
return 2;
}
// check if we received the ACK or not
return I2C_HAL_GetStatusFlag(i2c_addrs[obj->instance], kI2CReceivedNak) ? 1 : 0;
}
// this function waits the end of a rx transfer and return the status of the transaction:
// 0: OK
// 1: failure
static int i2c_wait_end_rx_transfer(i2c_t *obj) {
// wait for the end of the rx transfer
if (timeout_status_poll(obj, I2C_S_IICIF_MASK)) {
return 1;
}
obj->i2c->S |= I2C_S_IICIF_MASK;
return 0;
}
// this function waits the end of a rx transfer and return the status of the transaction:
// 0: OK
// 1: failure
static int i2c_wait_end_rx_transfer(i2c_t *obj) {
// wait for the end of the rx transfer
if (timeout_status_poll(obj, I2C_S_IICIF_MASK)) {
return 1;
}
i2c_hal_clear_interrupt(obj->instance);
return 0;
}
// this function waits the end of a rx transfer and return the status of the transaction:
// 0: OK
// 1: failure
static int i2c_wait_end_rx_transfer(i2c_t *obj) {
// wait for the end of the rx transfer
if (timeout_status_poll(obj, kI2CInterruptPending)) {
return 1;
}
uint32_t i2c_addrs[] = I2C_BASE_ADDRS;
I2C_HAL_ClearInt(i2c_addrs[obj->instance]);
return 0;
}
