Sample CC1200 code (running on Nucleo F303RE for Module17 to CC1200 eval board interfacing)

CC1200_M17_sample.c

//consts
const uint8_t cc1200_tx_settings[50*3] =
{
	0x00, 0x01, 0x08,
	0x00, 0x03, 0x09,
	0x00, 0x08, 0x1F,
	0x00, 0x0A, 0xC8, //deviation (for RX can be set to lower value like 0x9F)
	0x00, 0x0B, 0x00,
	0x00, 0x0C, 0x5D,
	0x00, 0x0D, 0x00,
	0x00, 0x0E, 0x8A,
	0x00, 0x0F, 0xCB,
	0x00, 0x10, 0xAC,
	0x00, 0x11, 0x00,
	0x00, 0x12, 0x45,
	0x00, 0x13, 0x3F,
	0x00, 0x14, 0x75,
	0x00, 0x15, 0x10,
	0x00, 0x16, 0x37,
	0x00, 0x17, 0xEC,
	0x00, 0x19, 0x11,
	0x00, 0x1B, 0x51,
	0x00, 0x1C, 0x87,
	0x00, 0x1D, 0x00,
	0x00, 0x20, 0x14,
	0x00, 0x26, 0x03,
	0x00, 0x27, 0x00,
	0x00, 0x28, 0x20,
	0x00, 0x2B, 0x3F, //power (0x01..0x3F)
	0x00, 0x2E, 0xFF,
	0x2F, 0x00, 0x1C,
	0x2F, 0x01, 0x22,
	0x2F, 0x05, 0x0D,
	0x2F, 0x0C, 0x57, //freq 439M = 0x57CCCD
	0x2F, 0x0D, 0xCC, //freq
	0x2F, 0x0E, 0xCD, //freq
	0x2F, 0x10, 0xEE,
	0x2F, 0x11, 0x10,
	0x2F, 0x12, 0x07,
	0x2F, 0x13, 0xAF,
	0x2F, 0x16, 0x40,
	0x2F, 0x17, 0x0E,
	0x2F, 0x19, 0x03,
	0x2F, 0x1B, 0x33,
	0x2F, 0x1D, 0x17,
	0x2F, 0x1F, 0x00,
	0x2F, 0x20, 0x6E,
	0x2F, 0x21, 0x1C,
	0x2F, 0x22, 0xAC,
	0x2F, 0x27, 0xB5,
	0x2F, 0x32, 0x0E,
	0x2F, 0x36, 0x03,
	0x2F, 0x91, 0x08,
};

//vars
uint8_t tx_data[4];
uint8_t rx_data[3]={0,0,0};

uint16_t adc_val=0;
int8_t freq_shift=0;

//IRQs
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{
	HAL_GPIO_TogglePin(TST_PIN_GPIO_Port, TST_PIN_Pin);

	if(mode) //TX
	{
		HAL_ADC_Start(&hadc1);
		adc_val=HAL_ADC_GetValue(&hadc1);
		freq_shift=(adc_val>>4)-128+20;
		tx_data[0]=freq_shift;
		HAL_SPI_Transmit(&hspi3, tx_data, 1, 1);
	}
	else //RX
	{
		HAL_SPI_TransmitReceive(&hspi3, tx_data, rx_data, 1, 10);
		HAL_DAC_SetValue(&hdac1, DAC_CHANNEL_1, DAC_ALIGN_12B_R, 2048+rx_data[0]*16);
		HAL_DAC_Start(&hdac1, DAC_CHANNEL_1);
	}
}

void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
{
	if(GPIO_Pin==GPIO_PIN_1)
	{
		if(HAL_GPIO_ReadPin(PTT_IN_GPIO_Port, PTT_IN_Pin))
		//PTT released
		{
			//RX
			mode=0;

			//stop data transmission
			HAL_TIM_Base_Stop_IT(&htim6);
			HAL_GPIO_WritePin(nCS2_GPIO_Port, nCS2_Pin, 1);

			//RX mode
			tx_data[0]=0x34;
			HAL_GPIO_WritePin(nCS2_GPIO_Port, nCS2_Pin, 0);
			HAL_SPI_Transmit(&hspi3, tx_data, 1, 100);
			HAL_GPIO_WritePin(nCS2_GPIO_Port, nCS2_Pin, 1);

			//DAC - RF PA bias control
			HAL_DAC_SetValue(&hdac1, DAC_CHANNEL_2, DAC_ALIGN_12B_R, 0);
			HAL_DAC_Start(&hdac1, DAC_CHANNEL_2);


			//initialize data transmission - RX
			tx_data[0]=0x2F|0x80|0x40;
			tx_data[1]=0x7D;
			tx_data[2]=0;

			HAL_GPIO_WritePin(nCS2_GPIO_Port, nCS2_Pin, 0);
			HAL_SPI_TransmitReceive(&hspi3, tx_data, rx_data, 3, 10);

			HAL_TIM_Base_Start_IT(&htim6);
		}
		else //PTT down
		{
			//TX
			mode=1;

			//DAC - RF PA bias control
			HAL_DAC_SetValue(&hdac1, DAC_CHANNEL_2, DAC_ALIGN_12B_R, (3.0/3.3)*4095);
			HAL_DAC_Start(&hdac1, DAC_CHANNEL_2);

			//stop data transmission
			HAL_TIM_Base_Stop_IT(&htim6);
			HAL_GPIO_WritePin(nCS2_GPIO_Port, nCS2_Pin, 1);

			//TX mode
			tx_data[0]=0x35;
			HAL_GPIO_WritePin(nCS2_GPIO_Port, nCS2_Pin, 0);
			HAL_SPI_Transmit(&hspi3, tx_data, 1, 100);
			HAL_GPIO_WritePin(nCS2_GPIO_Port, nCS2_Pin, 1);

			//initialize  data transmission - TX
			tx_data[0]=0x2F|0x40;
			tx_data[1]=0x7E;
			tx_data[2]=0;

			HAL_GPIO_WritePin(nCS2_GPIO_Port, nCS2_Pin, 0);
			HAL_SPI_Transmit(&hspi3, tx_data, 3, 10);

			//start data transmission
			HAL_TIM_Base_Start_IT(&htim6);
		}
	}
}

//main routine
int main(void)
{
  /* USER CODE BEGIN 1 */

  /* USER CODE END 1 */

  /* MCU Configuration--------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

  /* Configure the system clock */
  SystemClock_Config();

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_USART2_UART_Init();
  MX_TIM6_Init();
  MX_DAC1_Init();
  MX_SPI3_Init();
  MX_ADC1_Init();
  /* USER CODE BEGIN 2 */
  HAL_Delay(500);
  HAL_ADCEx_Calibration_Start(&hadc1, ADC_SINGLE_ENDED);

  //chip reset
  tx_data[0]=0x30;

  HAL_GPIO_WritePin(nCS2_GPIO_Port, nCS2_Pin, 0);
  HAL_SPI_Transmit(&hspi3, tx_data, 1, 10);
  HAL_GPIO_WritePin(nCS2_GPIO_Port, nCS2_Pin, 1);

  HAL_Delay(100);

  for(uint8_t i=0; i<50; i++)
  {
	  HAL_GPIO_WritePin(nCS2_GPIO_Port, nCS2_Pin, 0);
	  if(cc1200_tx_settings[i*3])
		  HAL_SPI_Transmit(&hspi3, &cc1200_tx_settings[i*3], 3, 100);
	  else
		  HAL_SPI_Transmit(&hspi3, &cc1200_tx_settings[i*3+1], 2, 100);
	  HAL_GPIO_WritePin(nCS2_GPIO_Port, nCS2_Pin, 1);
	  HAL_Delay(10);
  }

  //mode - RX
  tx_data[0]=0x34;
  HAL_GPIO_WritePin(nCS2_GPIO_Port, nCS2_Pin, 0);
  HAL_SPI_Transmit(&hspi3, tx_data, 1, 100);
  HAL_GPIO_WritePin(nCS2_GPIO_Port, nCS2_Pin, 1);

  //freq offset compensation
  int16_t offset=180;
  tx_data[0]=0x2F|0x40;
  tx_data[1]=0x0A;
  tx_data[2]=*((uint8_t*)&offset+1);
  tx_data[3]=*((uint8_t*)&offset);

  HAL_GPIO_WritePin(nCS2_GPIO_Port, nCS2_Pin, 0);
  HAL_SPI_Transmit(&hspi3, tx_data, 4, 10);
  HAL_GPIO_WritePin(nCS2_GPIO_Port, nCS2_Pin, 1);

  HAL_Delay(10);

  //dont increment address in burst mode
  tx_data[0]=0x2F;
  tx_data[1]=0x06;
  tx_data[2]=0;

  HAL_GPIO_WritePin(nCS2_GPIO_Port, nCS2_Pin, 0);
  HAL_SPI_Transmit(&hspi3, tx_data, 3, 10);
  HAL_GPIO_WritePin(nCS2_GPIO_Port, nCS2_Pin, 1);

  //read samples
  tx_data[0]=0x2F|0x80|0x40;
  tx_data[1]=0x7D;
  tx_data[2]=0;

  HAL_GPIO_WritePin(nCS2_GPIO_Port, nCS2_Pin, 0);
  HAL_SPI_TransmitReceive(&hspi3, tx_data, rx_data, 3, 10);

  HAL_Delay(10);

  HAL_TIM_Base_Start_IT(&htim6);
  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */
  }
  /* USER CODE END 3 */
}