rpi4-osdev/part14-spi-ethernet/net/encspi.c

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#include "../include/spi.h"
void ENC_SPI_Select(unsigned char truefalse) {
spi_chip_select(!truefalse); // If it's true, select 0 (the ENC), if false, select 1 (i.e. deselect the ENC)
}
void ENC_SPI_SendBuf(unsigned char *master2slave, unsigned char *slave2master, unsigned short bufferSize) {
spi_chip_select(0);
spi_send_recv(master2slave, slave2master, bufferSize);
spi_chip_select(1); // De-select the ENC
}
void ENC_SPI_Send(unsigned char command) {
spi_chip_select(0);
spi_send(&command, 1);
spi_chip_select(1); // De-select the ENC
}
void ENC_SPI_SendWithoutSelection(unsigned char command) {
spi_send(&command, 1);
}