Function modSPITxCommon

modules/pins/spi/esp/modSPI.c:436–465

}

static void modSPITxCommon(modSPIConfiguration config, uint8_t *data, uint16_t count, uint8_t endian, modSPIBufferLoader loader)
{
	uint8_t loaded;

	if (3 & (int)data) {
		modLog("SPI tx data address not long aligned");
		return;
	}

	modSPIActivateConfiguration(config);

	if (kSPIEndianLittle == endian)
		WRITE_PERI_REG(SPI_FLASH_USER(HSPI), SPI_FLASH_DOUT);
	else
		WRITE_PERI_REG(SPI_FLASH_USER(HSPI), SPI_FLASH_DOUT | SPI_WR_BYTE_ORDER);		// byte swap each 32-bit long as it is transmitted

	loaded = (loader)(data, (count <= SPI_BUFFER_SIZE) ? count : SPI_BUFFER_SIZE);
	if (loaded >= count)
		gSPIDataCount = 0;
	else {
		gSPIBufferLoader = loader;
		gSPIData = data + loaded;
		gSPIDataCount = count - loaded;
	}

	modSPIStartSend();

	if (config->sync)
		modSPIFlush();
}

void modSPITx(modSPIConfiguration config, uint8_t *data, uint16_t count)
{