/**
* \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
}
/**
* \internal
* \brief Helper function to send a byte over an arbitrary interface
*
* This function is used to hide what interface is used by the component
* driver, e.g. the component 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 ili9341_send_byte(uint8_t data)
{
#if defined(CONF_ILI9341_USART_SPI)
# if XMEGA
while (!usart_data_register_is_empty(CONF_ILI9341_USART_SPI)) {
/* Do nothing */
}
irqflags_t flags = cpu_irq_save();
usart_clear_tx_complete(CONF_ILI9341_USART_SPI);
usart_put(CONF_ILI9341_USART_SPI, data);
cpu_irq_restore(flags);
# else
usart_spi_write_single(CONF_ILI9341_USART_SPI, data);
# endif
#elif defined(CONF_ILI9341_SPI)
/* Wait for any previously running send data */
ili9341_wait_for_send_done();
spi_write_single(CONF_ILI9341_SPI, data);
#endif
}