stm32-returns-5.c

stm32-returns-5.c

// send 16 bit data packet
void MAX7219::sendPacket(MAX7129_REG reg, uint8_t data)
{
	// CS
	HAL_GPIO_WritePin(GPIOB, GPIO_PIN_1, GPIO_PIN_RESET);

	//uint16_t packet = (reg << 8) | data;
	uint8_t packet[2];
	packet[0] = reg;
	packet[1] = data;

	HAL_SPI_Transmit(const_cast<SPI_HandleTypeDef*>(_hSPI), (uint8_t*)&packet, 2, 100);

	// CS
	HAL_GPIO_WritePin(GPIOB, GPIO_PIN_1, GPIO_PIN_SET);

}

// set the whole display with an 8x8 buffer
void MAX7219::setBuffer(const BitBuf88& buf)
{
	for (int j = 0 ; j < 8; j++) {
		sendPacket(static_cast<MAX7129_REG>(j+1), buf._vals[j]);
	}
}