/**
* \internal
* \brief Helper function to send a byte over an arbitrary interface
*
* This function is used to hide what interface is used by the driver, e.g.
* the driver does not need to know if USART in SPI mode is used or the native
* SPI module.
*
* \param data the byte to be transfered
*/
__always_inline static void hx8347a_send_byte(uint8_t data)
{
#if defined(CONF_HX8347A_USART_SPI)
/* A workaround for optimizing data transfer had to be done for the
* XMEGA in order for the display to work correctly at all SPI clock
* clock speeds */
# if UC3
usart_spi_write_packet(CONF_HX8347A_USART_SPI, &data, 1);
# elif XMEGA
usart_spi_write_single(CONF_HX8347A_USART_SPI, data);
# endif
#elif defined(CONF_HX8347A_SPI)
spi_write_single(CONF_HX8347A_SPI, data);
/* Wait for TX to complete */
while (!spi_is_tx_ok(CONF_HX8347A_SPI)) {
/* Do nothing */
}
#endif
}
char SPI_L(char TX_Data)
{
/* Send pattern. */
spi_put(&NRF24L01_L_SPI,TX_Data);
/* Wait for transmission complete. */
while(!(spi_is_tx_ok(&NRF24L01_L_SPI)));
/* Read received data. */
uint8_t result = spi_get(&NRF24L01_L_SPI);
return(result);
}