RE: SPI on NCS

GPereira — Mon, 27 Sep 2021 09:41:24 GMT

After changing the way pointers were being dealt with the code worked:

mfrc522.c

void MFRC522_WriteRegister(uint8_t reg, uint8_t value){
    const struct spi_cs_control mfrc522_cs = {
    .gpio_dev = cs_dev,
    .gpio_pin = MFRC522_CS_PIN,
    .delay = 0,
    .gpio_dt_flags = MFRC522_CS_FLAGS,
    };

    const struct spi_config spi_conf = {
	.frequency = 200000,
	.operation = SPI_WORD_SET(8) | SPI_TRANSFER_MSB,
	.slave = 0,
	.cs = &mfrc522_cs,
    };

    struct spi_buf_set tx_bufs;
	struct spi_buf txb[2];

    txb[0].buf = ®
	txb[0].len = 1;
    txb[1].buf = &value;
	txb[1].len = 1;

	tx_bufs.buffers = (const struct spi_buf *)&txb;
	tx_bufs.count = 2;

	spi_write(spi_dev, &spi_conf, &tx_bufs);
}