Function obdSPIInit

lib/OneBitDisplay/OneBitDisplay.cpp:241–453

Initialize the display controller on an SPI bus

// Initialize the display controller on an SPI bus
//
void obdSPIInit(OBDISP *pOBD, int iType, int iDC, int iCS, int iReset, int iMOSI, int iCLK, int iLED, int bFlip, int bInvert, int bBitBang, int32_t iSpeed)
{
	uint8_t uc[32], *s;
	int iLen;

	pOBD->ucScreen = NULL; // start with no backbuffer; user must provide one later
	pOBD->iDCPin = iDC;
	pOBD->iCSPin = iCS;
	pOBD->iMOSIPin = iMOSI;
	pOBD->iCLKPin = iCLK;
	pOBD->iLEDPin = iLED;
	pOBD->type = iType;
	pOBD->flip = bFlip;
	pOBD->invert = bInvert;
	pOBD->wrap = 0;           // default - disable text wrap
	pOBD->com_mode = COM_SPI; // communication mode

	gpio_set_dir(pOBD->iCSPin, true);
	gpio_put(pOBD->iCSPin, 0); //(pOBD->type < SHARP_144x168)); // set to not-active

	if (pOBD->iDCPin != 0xff) // Note - not needed on Sharp Memory LCDs
	{
		gpio_set_dir(pOBD->iDCPin, true);
		gpio_put(pOBD->iDCPin, 0); // for some reason, command mode must be set or some OLEDs/LCDs won't initialize correctly even if set later
	}

	if (bBitBang)
	{
		gpio_set_dir(iMOSI, true);
		gpio_set_dir(iCLK, true);
	}

	// Reset it
	if (iReset != -1)
	{
		gpio_set_dir(iReset, true);
		gpio_put(iReset, LOW);
		sleep_ms(100);
		gpio_put(iReset, HIGH);
		sleep_ms(100);
	}

	if (iLED != -1)
	{
		gpio_set_dir(iLED, true);
	}

	// Initialize SPI
	if (!bBitBang)
	{
		pOBD->iMOSIPin = 0xff; // mark it as hardware SPI
		gpio_set_function(pOBD->iCLKPin, GPIO_FUNC_SPI);
		gpio_set_function(pOBD->iMOSIPin, GPIO_FUNC_SPI);

		spi_init(pOBD->spi->getController(), 1000 * 1000);
		spi_set_format(pOBD->spi->getController(), 8, SPI_CPOL_0, SPI_CPHA_0, SPI_MSB_FIRST);
	}