STM32F0 Communication with STPM33 Evaluation board

[Gz_it]

Hi All;

I would like to measure active power.

	DataTx[0] = 0xFF;
	DataTx[1] = 0x00;
	DataTx[2] = 0xA0;
	DataTx[3] = 0x00;
	DataTx[4] = Metro_HAL_CalcCRC8(DataTx);
	HAL_SPI_TransmitReceive(&hspi1, (uint8_t *)DataTx, (uint8_t *)DataRx, sizeof(DataTx),100);
	DataTx[0] = 0xFF;
	DataTx[1] = 0x01;
	DataTx[2] = 0x1E;
	DataTx[3] = 0x04;
	DataTx[4] = Metro_HAL_CalcCRC8(DataTx);
	HAL_SPI_TransmitReceive(&hspi1, (uint8_t *)DataTx, (uint8_t *)DataRx, sizeof(DataTx),100);
	DataTx[0] = 0xFF;
	DataTx[1] = 0x05;
	DataTx[2] = 0x80;
	DataTx[3] = 0x00;
	DataTx[4] = Metro_HAL_CalcCRC8(DataTx);
	HAL_SPI_TransmitReceive(&hspi1, (uint8_t *)DataTx, (uint8_t *)DataRx, sizeof(DataTx),100);
	DataTx[0] = 0x04;
	DataTx[1] = 0xFF;
	DataTx[2] = 0xFF;
	DataTx[3] = 0xFF;
	DataTx[4] = Metro_HAL_CalcCRC8(DataTx);
	HAL_SPI_TransmitReceive(&hspi1, (uint8_t *)DataTx, (uint8_t *)DataRx, sizeof(DataTx),100);
 
		DataTx[0] = 0x5C; // Active power
		DataTx[1] = 0xFF;
		DataTx[2] = 0xFF;
		DataTx[3] = 0xFF;
		DataTx[4] = Metro_HAL_CalcCRC8(DataTx);
	 HAL_SPI_TransmitReceive(&hspi1, (uint8_t *)DataTx, (uint8_t *)DataRx, sizeof(DataTx),100);
	 Tx[0] = DataRx[0];
	 Tx[1] = DataRx[1];
	 Tx[2] = DataRx[2];
	 Tx[3] = DataRx[3];
	 convertBufferContent();
	 HAL_Delay(1000);
 
	 // DataTx[0] = 0x28;
		//DataTx[1] = 0x29;
		//DataTx[2] = 0x00;
		//DataTx[3] = 0x49;
	 //HAL_SPI_TransmitReceive(&hspi1, (uint8_t *)DataTx, (uint8_t *)DataRx, sizeof(DataTx),100);
	 //HAL_Delay(1000);

 

I received data in DataRx variable. How should I do when I would like to watch real value? ( Such as V1 : 230V )