Function SPI_write

Scan/Devices/STLcd/lcd_scan.c:158–184

Write buffer to SPI FIFO

// Write buffer to SPI FIFO
void SPI_write( uint8_t *buffer, uint8_t len )
{

	for ( uint8_t byte = 0; byte < len; byte++ )
	{
#if defined(_kinetis_)
		// Wait for SPI TxFIFO to have 4 or fewer entries
		while ( !( SPI0_SR & SPI_SR_TFFF ) )
			delay_us(10);

		// Write byte to TxFIFO
		// CS0, CTAR0
		SPI0_PUSHR = ( buffer[ byte ] & 0xff ) | SPI_PUSHR_PCS(1);

		// Indicate transfer has completed
		while ( !( SPI0_SR & SPI_SR_TCF ) );
		SPI0_SR |= SPI_SR_TCF;
#elif defined(_sam_)
		/*
		// Wait for transmit register to be empty
		while (!(SPI0->SPI_SR & SPI_SR_TDRE));
		// Send data to transmit register
		SPI0->SPI_TDR = data;
		*/
#endif
	}
}

// Write to a control register
void LCD_writeControlReg( uint8_t byte )