void spi_init( void) {
/* Set MOSI and SCK output, all others input */
SPI_DDR |= _BV(SPI_MOSI_PIN)| _BV(SPI_SCK_PIN);
/* enable pull up for miso */
// SPI_PORT |= _BV(SPI_MISO_PIN);
/* Set SS0 output */
sbi( SPI_SS0_DDR, SPI_SS0_PIN);
/* SS0 idles high (don't select slave yet)*/
SPI_UNSELECT_SLAVE0();
/* Set SS1 output */
sbi( SPI_SS1_DDR, SPI_SS1_PIN);
/* SS1 idles high (don't select slave yet)*/
SPI_UNSELECT_SLAVE1();
spi_cur_slave = SPI_NONE;
}
void ad7714_on_spi_it( void ) {
uint8_t spi_read = SPDR;
if (msg == &ad7714_read) {
if (idx==1)
ad7714_sample = spi_read<<8;
else if (idx==2) {
ad7714_sample += spi_read;
ad7714_sample_read = TRUE;
}
}
idx++;
if (idx < msg->len) {
SPI_SEND(msg->data[idx]);
}
else {
SPI_UNSELECT_SLAVE1();
SPI_STOP();
}
}
