Function LCD_writeControlReg

Scan/Devices/STLcd/lcd_scan.c:187–220

Write to a control register

// Write to a control register
void LCD_writeControlReg( uint8_t byte )
{
#if defined(_kinetis_)
	// Wait for TxFIFO to be empt
	while ( SPI0_TxFIFO_CNT != 0 );

	// Set A0 low to enter control register mode
	GPIOC_PCOR |= (1<<7);

	// Write byte to SPI FIFO
	SPI_write( &byte, 1 );

	// Wait for TxFIFO to be empty
	while ( SPI0_TxFIFO_CNT != 0 );

	// Make sure data has transferred
	delay_us(10); // XXX Adjust if SPI speed changes

	// Set A0 high to go back to display register mode
	GPIOC_PSOR |= (1<<7);
#elif defined(_sam_)
	// Set A0 low to enter control register mode
	PIOC->PIO_CODR= (1<<7);

	// Write byte to SPI FIFO
	SPI_write( &byte, 1 );

	// Make sure data has transferred
	delay_us(10); // XXX Adjust if SPI speed changes

	// Set A0 high to go back to display register mode
	PIOC->PIO_SODR= (1<<7);
#endif
}

// Write to a data register with a0 bit high
void LCD_writeDataReg( uint8_t byte )