[参考译文] DLP-7970ABP：DLP-7970ABP

https://e2e.ti.com/support/wireless-connectivity/other-wireless-group/other-wireless/f/other-wireless-technologies-forum/1444088/dlp-7970abp-dlp-7970abp

工具与软件：

您好！

我正在使用 stm32l0开发 RFID 读取器 TRF7970a 芯片、我现在遇到的问题是我好像初始化芯片有误、因此不会发出射频场。 首先、电源状态良好、因为绿色 LED 亮起、通过 SPI 在 STM32和 trf 之间进行通信的情况良好、因为我可以写入寄存器、然后读取它、所有这些都匹配。 问题是、代码开始工作前一周、我可以在示波器上看到射频场、但现在没有变化、但不会发出射频场...

如果有任何帮助、将不胜感激。

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_TIM22_Init();
  /* USER CODE BEGIN 2 */
  SLAVE_SELECT_LOW;
  HAL_Delay(2);
  SLAVE_SELECT_HIGH;
  // Wait until TRF system clock started
//  HAL_Delay(5);

  //set the enable Pin high
  TRF_DISABLE;
  HAL_Delay(4);
  TRF_ENABLE;

  // Set up TRF initial settings
  TRF79xxA_initialSettings();
  TRF79xxA_setTrfPowerSetting(TRF79xxA_3V_FULL_POWER);
  // Initialize all enabled technology layers
  NFC_init();

//  TRF79xxA_writeRegister(0x00, 0x20);

  log_message("Chip Status control register ");
  log_byteAsBits(TRF79xxA_readRegister(0x00));
  log_message("\r\n");
//  test_NFRFID_SPI_Communication();
  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  TRF79xxA_turnRfOn();
//
  log_message("Chip Status control register ");
  log_byteAsBits(TRF79xxA_readRegister(0x00));
  log_message("\r\n");

  log_message("IRQ register ");
  log_byteAsBits(TRF79xxA_readRegister(TRF79XXA_IRQ_STATUS));
  log_message("\r\n");

  log_message("RSSI levels register ");
  log_byteAsBits(TRF79xxA_readRegister(TRF79XXA_RSSI_LEVELS));
  log_message("\r\n");

//  IRQ_ON;
  while (1)
  {
    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */
	  NFC_findTag();

//	  HAL_Delay(1000);
  }
  /* USER CODE END 3 */
}