/*-----------------------------------------------------------*/
uint8_t serial_send_byte(serial_p handle, uint8_t byte )
{
if ( (handle->_tx_buf != 0)) {
if (buffer_put_item(handle->_tx_buf,byte) == BUFFER_OK) {
_serial_tx_int_on(handle->ser_UDR);
return BUFFER_OK;
}
}
return BUFFER_FULL;
}
/*-----------------------------------------------------------*/
uint8_t serial_send_bytes(serial_p handle, uint8_t *buf, uint8_t len )
{
// Check if buffer is full
if ( ((handle->_tx_buf != 0) && (len > (BUFFER_SIZE - handle->_tx_buf->no_in_buffer))) || ((handle->_tx_buf == 0) && (len > 1)) ) {
return BUFFER_FULL;
}
// Put in the tx buffer
for (uint8_t i = 0; i < len; i++) {
buffer_put_item(handle->_tx_buf, buf[i]);
}
_serial_tx_int_on(handle->ser_UDR);
return BUFFER_OK;
}
/**
@ingroup spi_function
@brief Send a single byte to the SPI bus.
@return \n
SPI_OK: OK byte send to SPI bus.\n
SPI_NO_ROOM_IN_TX_BUFFER: Buffer full no data send.\n
SPI_ILLEGAL_INSTANCE: instance is null.
@param spi to send to.
@param byte to be send.
*/
uint8_t spi_send_byte(spi_p spi, uint8_t byte) {
if (spi == 0) {
return SPI_ILLEGAL_INSTANCE;
}
// Select correct instance
if (_this != spi ) {
_select_instance(spi);
}
uint8_t result = SPI_OK;
// Critical section
{
// disable interrupt
uint8_t c_sreg = SREG;
cli();
// If SPI in idle send the first byte
if (!_spi_active) {
_spi_active = 1;
_set_cs(CS_ACTIVE);
// Enable SPI interrupt
SPCR |= _BV(SPIE);
// Send first byte
SPDR = byte;
}
#if SPI_USE_BUFFER == 0
else {
result = SPI_BUSY;
}
#else
else {
// Check if buffer is free
if ( ((spi->_tx_buf != 0) && (BUFFER_SIZE - spi->_tx_buf->no_in_buffer)) || (spi->_tx_buf == 0) ) {
// Put in the tx buffer
buffer_put_item(spi->_tx_buf, byte);
}else {
result = SPI_NO_ROOM_IN_TX_BUFFER;
}
}
#endif
// restore interrupt state
SREG = c_sreg;
}
