add iic scan

inc/LDC1612.h

@@ -49,4 +49,6 @@ void LDC1612_Init(void);
 int LDC1612_read_reg(uint8_t device_address, uint8_t reg_address, uint8_t *data, uint16_t length);
 int i2c_write_reg(uint8_t device_address, uint8_t *data);
 
+void I2C_Scan(void);
+
 #endif //LDC1612_H

src/LDC1612.c

@@ -3,8 +3,6 @@
 //
 
 #include "LDC1612.h"
-#include "i2c.h"
-
 
 void led_config(void)
 {
@@ -264,4 +262,54 @@ i2c_ack_config(LDC_I2C, I2C_ACK_ENABLE); // 重新启用ACK
     return 0;
 }
 
+void I2C_Scan(void) {
+    uint32_t timeout;
+    uint8_t address;
+    int found_devices = 0;
 
+    printf("Scanning I2C bus...\r\n");
+
+    for (address = 1; address < 127; address++) {
+        timeout = 0;
+
+        // 生成起始条件
+        while (i2c_flag_get(LDC_I2C, I2C_FLAG_I2CBSY) && (timeout < I2C_TIME_OUT))
+            timeout++;
+        if (timeout >= I2C_TIME_OUT) {
+            continue; // 超时，跳过该地址
+        }
+        i2c_start_on_bus(LDC_I2C);
+        timeout = 0;
+
+        // 等待起始条件发送完成
+        while (!i2c_flag_get(LDC_I2C, I2C_FLAG_SBSEND) && (timeout < I2C_TIME_OUT))
+            timeout++;
+        if (timeout >= I2C_TIME_OUT) {
+            continue; // 超时，跳过该地址
+        }
+        i2c_master_addressing(LDC_I2C, address << 1, I2C_TRANSMITTER);
+        timeout = 0;
+
+        // 等待地址发送完成
+        while (!i2c_flag_get(LDC_I2C, I2C_FLAG_ADDSEND) && (timeout < I2C_TIME_OUT))
+            timeout++;
+        if (timeout < I2C_TIME_OUT) {
+            i2c_flag_clear(LDC_I2C, I2C_FLAG_ADDSEND);
+            printf("Found device at 0x%02X\r\n", address);
+            found_devices++;
+        }
+
+        // 生成停止条件
+        i2c_stop_on_bus(LDC_I2C);
+        timeout = 0;
+
+        while (i2c_flag_get(LDC_I2C, I2C_FLAG_STPDET) && (timeout < I2C_TIME_OUT))
+            timeout++;
+    }
+
+    if (found_devices == 0) {
+        printf("No I2C devices found.\r\n");
+    } else {
+        printf("Total %d I2C devices found.\r\n", found_devices);
+    }
+}

src/main.c

@@ -33,7 +33,9 @@ int main(void)
     printf("XLSW-3DP-LDC1612! V0.0.1\r\n");
     printf("\r\n");
 
-    LDC1612_Init();
+    LDC1612_I2CConfig();
+    // LDC1612_Init();
+    I2C_Scan();