我想要用 开发一款物联网应用，用 P‑L496‑CELL02 板载的 BG96 调制解调器。模组之间 AT 指令交互通信是正常的；可是我插上Micro‑SIM 卡仍然持续收到报错信息：Sim Not inserted。
我已经按照手册说明，在 CubeMX 中开启了PC2与PI3引脚；分别将它们设置为 0 和 1，并且在应用代码里面校验过这两个引脚的电平。
开发板通过 Arduino‑Vin 外接电源供电。。
我已经检查过焊接全都没问题。
下面是我的代码。所有 AT 命令返回都是 OK。
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_I2C1_Init();
MX_USB_DEVICE_Init();
MX_USART2_UART_Init();
MX_USART3_UART_Init();
MX_USART1_UART_Init();
/* USER CODE BEGIN 2 */
/* USER CODE BEGIN 2 */
uint8_t response[256];
uint8_t byte;
uint16_t idx = 0;
#define SEND_AT(cmd) do { \
memset(response, 0, sizeof(response)); \
idx = 0; \
HAL_UART_Transmit(&huart1, (uint8_t*)cmd, strlen(cmd), 1000); \
while(idx < sizeof(response)-1) { \
if(HAL_UART_Receive(&huart1, &byte, 1, 500) == HAL_OK) \
response[idx++] = byte; \
else break; \
} \
HAL_UART_Transmit(&huart2, response, idx, 1000); \
HAL_Delay(1000); \
} while(0)
// Select microsim and power on modem
HAL_GPIO_WritePin(GPIOC, GPIO_PIN_2, GPIO_PIN_RESET);
HAL_Delay(2000);
HAL_GPIO_WritePin(GPIOI, GPIO_PIN_3, GPIO_PIN_SET);
HAL_Delay(2000);
HAL_GPIO_WritePin(GPIOD, GPIO_PIN_3, GPIO_PIN_SET);
HAL_Delay(5000);
HAL_UART_Receive(&huart1, (uint8_t *)response, sizeof(response) - 1, 1000);
memset(response, 0, sizeof(response));
// Wait for RDY from modem instead of fixed delay
//uint8_t rdyBuf[64];
//uint8_t rdyByte;
//uint16_t rdyIdx = 0;
uint8_t val;
//memset(rdyBuf, 0, sizeof(rdyBuf));
/*while(rdyIdx < sizeof(rdyBuf) - 1)
{
if(HAL_UART_Receive(&huart1, &rdyByte, 1, 10000) == HAL_OK)
{
rdyBuf[rdyIdx++] = rdyByte;
// Check if we received RDY
if(strstr((char*)rdyBuf, "RDY") != NULL)
{
HAL_UART_Transmit(&huart2, (uint8_t*)"Modem Ready!\r\n", 14, 1000);
break;
}
}
else
{
break;
}
}*/
// Now send AT commands
SEND_AT("AT+CMEE=2\r\n");
HAL_Delay(2000);
SEND_AT("AT+CFUN?\r\n");
HAL_Delay(2000);
SEND_AT("AT+CGMR\r\n");
HAL_Delay(2000);
SEND_AT("AT+QSIMSTAT?\r\n");
HAL_Delay(2000);
SEND_AT("AT+QSIMDET=0,0\r\n");
HAL_Delay(2000);
SEND_AT("AT&W\r\n");
HAL_Delay(2000);
//SEND_AT("AT+QCFG=?\r\n");
//HAL_Delay(8000);
SEND_AT("AT+CFUN=1,1\r\n");
HAL_Delay(10000);
HAL_UART_Receive(&huart1, (uint8_t *)response, sizeof(response) - 1, 1000);
memset(response, 0, sizeof(response));
val = (HAL_GPIO_ReadPin(GPIOC, GPIO_PIN_2) == GPIO_PIN_RESET) ? '0' : '1';
HAL_Delay(2000);
if (HAL_GPIO_ReadPin(GPIOC, GPIO_PIN_2) == GPIO_PIN_RESET){
val = '0';
}
else{
val = '1';
}
HAL_UART_Transmit(&huart2, &val, 1, 1000);
HAL_GPIO_WritePin(GPIOC, GPIO_PIN_2, GPIO_PIN_RESET);
HAL_Delay(2000);
val = (HAL_GPIO_ReadPin(GPIOC, GPIO_PIN_2) == GPIO_PIN_RESET) ? '0' : '1';
HAL_Delay(2000);
if (HAL_GPIO_ReadPin(GPIOC, GPIO_PIN_2) == GPIO_PIN_RESET){
val = '0';
}
else{
val = '1';
}
HAL_UART_Transmit(&huart2, &val, 1, 1000);
val = (HAL_GPIO_ReadPin(GPIOI, GPIO_PIN_3) == GPIO_PIN_SET) ? '1' : '0';
HAL_Delay(2000);
if (HAL_GPIO_ReadPin(GPIOI, GPIO_PIN_3) == GPIO_PIN_SET){
val = '1';
}
else{
val = '0';
}
HAL_UART_Transmit(&huart2, &val, 1, 1000);
SEND_AT("AT+QSIMDET?\r\n");
HAL_Delay(2000);
SEND_AT("AT+QSIMSTAT?\r\n");
HAL_Delay(2000);
SEND_AT("AT+CPIN?\r\n");
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