LDC1612单次读取16bit正常，可以获取厂商ID或者设备ID，但是无法连续获取

inc/LDC1612.h

@@ -58,7 +58,7 @@ typedef enum {
 void I2C_config(void);
 void I2C_scan(void);
 
-int LDC1612_IIC_read_16bits(void);
+int LDC1612_IIC_read_16bits(uint8_t reg, uint16_t *data);
 
 
 

src/LDC1612.c

@@ -97,9 +97,7 @@ void I2C_scan(void) {
     }
 }
 
-int LDC1612_IIC_read_16bits(void) {
+int LDC1612_IIC_read_16bits(uint8_t reg, uint16_t *data) {
-    uint8_t data[2] = {0};
-    uint16_t raw_temp = 0;
     uint16_t timeout = 0;
 
     i2c_ack_config(I2C0, I2C_ACK_ENABLE);
@@ -135,13 +133,15 @@ int LDC1612_IIC_read_16bits(void) {
     while (!i2c_flag_get(I2C0, I2C_FLAG_TBE) && (timeout < I2C_TIME_OUT)) //判断地址是否发送完成，然后发送寄存器地址
         timeout++;
     if (timeout < I2C_TIME_OUT) {
-        i2c_data_transmit(I2C0, READ_DEVICE_ID);
+        i2c_data_transmit(I2C0, reg);
         timeout = 0;
         // i2c_start_on_bus(I2C0);
     } else {
         return -4; // 超时返回错误
     }
 
+    delay_us(10);
+
     while (i2c_flag_get(I2C0, I2C_FLAG_BTC) && (timeout < I2C_TIME_OUT)) //判断发送缓冲器是否为空，为空后（发送完毕）重新发送开始信号
         timeout++;
     if (timeout < I2C_TIME_OUT) {
@@ -175,20 +175,20 @@ int LDC1612_IIC_read_16bits(void) {
         timeout++;
     }
     if (timeout < I2C_TIME_OUT) {
-        data[0] = i2c_data_receive(I2C0);
+        *data = i2c_data_receive(I2C0) << 8;
         timeout = 0;
     } else {
         return -8; // 超时返回错误
     }
 
-    // i2c_ack_config(I2C0, I2C_ACK_DISABLE); // 关闭发送ACK，它会在下一个字节完成后发送NAK
+    i2c_ack_config(I2C0, I2C_ACK_DISABLE); // 关闭发送ACK，它会在下一个字节完成后发送NAK
 
     // 读取第二个字节的数据
     while (!i2c_flag_get(I2C0, I2C_FLAG_RBNE) && (timeout < I2C_TIME_OUT)) {
         timeout++;
     }
     if (timeout < I2C_TIME_OUT) {
-        data[1] = i2c_data_receive(I2C0);
+        *data |= i2c_data_receive(I2C0);
         timeout = 0;
     } else {
         return -9; // 超时返回错误
@@ -196,6 +196,6 @@ int LDC1612_IIC_read_16bits(void) {
 
     i2c_stop_on_bus(I2C0);
 
-    printf("device id = %x\r\n", (data[0] <<8 | data[1]));
+    // printf("device id = %x\r\n", (data[0] <<8 | data[1]));
     return 0;
 }

src/main.c

@@ -12,8 +12,7 @@
 #include "RS485.h"
 #include "LDC1612.h"
 
-void led_config(void)
+void led_config(void) {
-{
     rcu_periph_clock_enable(LED_RCU);
 
     gpio_mode_set(LED_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, LED_PIN);
@@ -40,8 +39,7 @@ void led_config(void)
     nvic_irq_enable(LED_IRQ, 2);
 }
 
-void iicSendData(void)
+void iicSendData(void) {
-{
     while (i2c_flag_get(I2C0, I2C_FLAG_I2CBSY));
     i2c_start_on_bus(I2C0);
     printf("1\r\n");
@@ -57,8 +55,7 @@ void iicSendData(void)
     i2c_start_on_bus(I2C0);
 }
 
-void iicReceiveData(void)
+void iicReceiveData(void) {
-{
     uint16_t data[3] = {0};
     i2c_start_on_bus(I2C0);
     // i2c_stop_on_bus(I2C0);
@@ -91,8 +88,7 @@ void iicReceiveData(void)
     \param[out] none
     \retval     none
 */
-int main(void)
+int main(void) {
-{
     /* configure systick */
     systick_config();
     RS485_config();
@@ -104,61 +100,31 @@ int main(void)
     printf("XLSW-3DP-LDC1612! V0.0.1\r\n");
     printf("\r\n");
 
-    // uint16_t data[3] = {0};
+    delay_ms(500);
 
-    // I2C_scan();
+    // int result = 0;
-
+    uint16_t data = 0;
-    delay_ms(1000);
+    uint16_t device_id = 0;
-
+    LDC1612_IIC_read_16bits(READ_DEVICE_ID, &data);
-    // while (i2c_flag_get(I2C0, I2C_FLAG_I2CBSY));
+    // printf("result = %d\r\n", result);
-    // i2c_start_on_bus(I2C0);
-    // printf("1\r\n");
-    // while (!i2c_flag_get(I2C0, I2C_FLAG_SBSEND));
-    // i2c_master_addressing(I2C0, LDC1612_ADDR, I2C_TRANSMITTER);
-    // printf("2\r\n");
-    // while (!i2c_flag_get(I2C0, I2C_FLAG_ADDSEND));
-    // i2c_flag_clear(I2C0, I2C_FLAG_ADDSEND);
-    // printf("3\r\n");
-    // while (!i2c_flag_get(I2C0, I2C_FLAG_TBE));
-    // i2c_data_transmit(I2C0, 0x7E);
-    // printf("4\r\n");
-    // i2c_start_on_bus(I2C0);
-    // // i2c_stop_on_bus(I2C0);
 
 
-    // delay_ms(100);
+    // delay_ms(1000);
-    // i2c_start_on_bus(I2C0);
-    // delay_ms(100);
-    // i2c_stop_on_bus(I2C0);
 
 
-    // i2c_stop_on_bus(I2C0);
+    LDC1612_IIC_read_16bits(READ_DEVICE_ID, &device_id);
-    // i2c_ack_config(I2C0, I2C_ACK_ENABLE);
+    printf("Manufacturer: 0x%x\r\n", data);
-
+    printf("Device: 0x%x\r\n", device_id);
-    // iicSendData();
-    // iicReceiveData();
-
-    int result = 0;
-    result = LDC1612_IIC_read_16bits();
-    printf("result = %d\r\n", result);
 
     while (1) {
-
-
         delay_ms(1000);
         printf("OK!!!\r\n");
-        // iicSendData();
-
-        // i2c_flag_clear(I2C0, I2C_FLAG_I2CBSY);
-
     }
 }
 
 /* retarget the C library printf function to the USART */
-int _write (int fd, char *pBuffer, int size)
+int _write(int fd, char *pBuffer, int size) {
-{
+    for (int i = 0; i < size; i++) {
-    for (int i = 0; i < size; i++)
-    {
         usart_data_transmit(USART0, (uint8_t) pBuffer[i]);
         while (RESET == usart_flag_get(USART0, USART_FLAG_TBE));
     }