diff --git a/APP/peripheral_main.c b/APP/peripheral_main.c
index ea0ec91..0ae1cbf 100644
--- a/APP/peripheral_main.c
+++ b/APP/peripheral_main.c
@@ -167,7 +167,7 @@ int main(void)
     BSP_UART1_Init(1500000);
     // logDebug("Start @ChipID=%02X\n", R8_CHIP_ID);
     logDebug("Start @ChipID=%02X\n", R8_CHIP_ID);
-    logError("中文测试");
+    logError("中文测试 %2.2f", 123.456);
 #endif
 
     DelayMs(1000 * 3);
diff --git a/BSP/src/bsp_i2c.c b/BSP/src/bsp_i2c.c
index 313c49a..ebe8594 100644
--- a/BSP/src/bsp_i2c.c
+++ b/BSP/src/bsp_i2c.c
@@ -9,7 +9,7 @@
 #undef LOG_TAG
 #define LOG_TAG "I2C"
 
-#define CONFIG_I2C_DEBUG
+// #define CONFIG_I2C_DEBUG
 
 #ifdef CONFIG_I2C_DEBUG
 #define I2C_DBG(...) logDebug(__VA_ARGS__)
@@ -42,7 +42,7 @@ static struct i2c_slave_cb *slave_cb = NULL;
 #define MASTER_ADDR 0x42
 
 uint8_t i2c_tx_data[2];
-uint8_t i2c_rx_data[8];
+uint8_t i2c_rx_data[6];
 
 void BSP_I2C_Init(uint8_t address)
 {
@@ -298,45 +298,84 @@ void GXHTC3C_GetStart(void)
     GXHTC3C_SendCmd(GXHTC3C_CMD_LOW_CLK_STRE_OFF_HUMI_FRONT);
 }
 
-uint8_t CRC_8(uint8_t *p_crc, uint8_t len)
-{
-    uint8_t crc_value = 0xFF;
-    uint8_t i = 0, j = 0;
+// 定义CRC-8参数
+#define POLYNOMIAL  0x31  // 生成多项式：x8+x5+x4+1 (省略最高位1)
+#define INIT_VALUE  0xFF  // 初始化值
+#define REFLECT_IN  false // 不反射输入
+#define REFLECT_OUT false // 不反射输出
 
-    for (i = 0; i < len; i++)
+uint8_t GXHTC3C_CRC_8(uint8_t *p_crc, uint8_t len)
+{
+    uint8_t crc = INIT_VALUE;
+
+    for (size_t i = 0; i < len; ++i)
     {
-        crc_value ^= *(p_crc + i);
-        for (j = 0; j < 8; j++)
+        crc ^= p_crc[i]; // 异或当前字节
+
+        for (uint8_t j = 0; j < 8; ++j)
         {
-            if (crc_value & 0x80)
-                crc_value = (crc_value << 1) ^ 0x31;
+            if (crc & 0x80)
+            {                                  // 如果最高位是1
+                crc = (crc << 1) ^ POLYNOMIAL; // 左移一位并异或多相式
+            }
             else
-                crc_value = (crc_value << 1);
+            {
+                crc <<= 1; // 否则只左移一位
+            }
+
+            // 确保crc保持在8位内
+            crc &= 0xFF;
         }
     }
-    return crc_value;
+
+    // 最终返回CRC值
+    return crc;
 }
 
 // GXHTC3C_CMD_LOW_CLK_STRE_OFF_HUMI_FRONT
-void GXHTC3C_GetTempHumi(void)
+uint8_t GXHTC3C_GetTempHumi(float *humi, float *temp)
 {
     int ret;
     ret = I2C_Read(GXHTC3C_ADDR, (uint8_t *)&i2c_rx_data, 6, true, 1000);
     logDebug("read %d byte(s) from %#x", ret, GXHTC3C_ADDR);
-    if (ret >= 0)
+    if (ret != 6)
     {
+        logError("read failed");
         logHexDumpAll(i2c_rx_data, ret);
+        return 1;
     }
 
     // 低功耗、Clock stretching关闭、湿度在前
-    uint16_t humi = (i2c_rx_data[0] << 8) | i2c_rx_data[1];
-    uint8_t crc_humi = CRC_8(humi, 2);
-    uint16_t temp = (i2c_rx_data[3] << 8) | i2c_rx_data[4];
-    uint8_t crc_temp = CRC_8(temp, 2);
-    if (crc == i2c_rx_data[3])
+    uint8_t humi_raw_data[2];
+    uint8_t temp_raw_data[2];
+
+    humi_raw_data[0] = i2c_rx_data[0];
+    humi_raw_data[1] = i2c_rx_data[1];
+    uint16_t raw_humi = (humi_raw_data[0] << 8) | humi_raw_data[1];
+    uint8_t crc_humi  = GXHTC3C_CRC_8(humi_raw_data, 2);
+
+    temp_raw_data[0] = i2c_rx_data[3];
+    temp_raw_data[1] = i2c_rx_data[4];
+    uint16_t raw_temp = (temp_raw_data[0] << 8) | temp_raw_data[1];
+    uint8_t crc_temp  = GXHTC3C_CRC_8(temp_raw_data, 2);
+
+    if ((crc_humi == i2c_rx_data[2]) && (crc_temp == i2c_rx_data[5]))
     {
-        logDebug("temp crc ok");
+        logDebug("crc ok");
+        logHexDumpAll(i2c_rx_data, 6);
+
+        *humi = (100.0 * raw_humi) / 65536.0;         // 湿度真实值
+        *temp = (175.0 * raw_temp) / 65536.0 - 45.0; // 温度真实值
+        // logDebug("humi %f, temp %f", *humi, *temp);
     }
+    else
+    {
+        logHexDumpAll(i2c_rx_data, 6);
+        logError("crc_temp 0x%02x, crc_humi 0x%02x", crc_temp, crc_humi);
+        logError("crc error");
+        return 2;
+    }
+    return 0;
 }
 
 void GXHTC3C_Init(void)
@@ -346,12 +385,19 @@ void GXHTC3C_Init(void)
     int ret;
 
     GXHTC3C_Sleep();
-    DelayMs(2);
+    DelayMs(100);
 
     GXHTC3C_Wakeup();
-    DelayMs(1);
+    DelayMs(2);
 
     GXHTC3C_GetStart();
+    DelayMs(4);
+    float humi, temp;
+    ret = GXHTC3C_GetTempHumi(&humi, &temp);
+    if (ret == 0)
+    {
+        logDebug("humi %.2f %, temp %.2f C", humi, temp);
+    }
 
 #endif
 }