diff --git a/.gitignore b/.gitignore
index 3181b7a..0e65fce 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
-EWARM/
\ No newline at end of file
+/EWARM/*
+!/EWARM/iar/
\ No newline at end of file
diff --git a/.vscode/settings.json b/.vscode/settings.json
index e22f4d0..2c9544c 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -15,6 +15,10 @@
         "core_cm4.h": "c",
         "gd32f4xx_usart.h": "c",
         "stdlib.h": "c",
-        "gd32f4xx_gpio.h": "c"
+        "gd32f4xx_gpio.h": "c",
+        "gd32f4xx_i2c.h": "c",
+        "drv_i2c.h": "c",
+        "mb85rc64.h": "c",
+        "gd32f4xx_rcu.h": "c"
     }
 }
\ No newline at end of file
diff --git a/EWARM/iar/GD32F450xE.icf b/EWARM/iar/GD32F450xE.icf
new file mode 100644
index 0000000..3074568
--- /dev/null
+++ b/EWARM/iar/GD32F450xE.icf
@@ -0,0 +1,35 @@
+/*###ICF### Section handled by ICF editor, don't touch! ****/
+/*-Editor annotation file-*/
+/* IcfEditorFile="$TOOLKIT_DIR$\config\ide\IcfEditor\cortex_v1_0.xml" */
+/*-Specials-*/
+define symbol __ICFEDIT_intvec_start__ = 0x08000000;
+/*-Memory Regions-*/
+define symbol __ICFEDIT_region_ROM_start__ = 0x08000000;
+define symbol __ICFEDIT_region_ROM_end__   = 0x0807FFFF;
+define symbol __ICFEDIT_region_RAM_start__ = 0x20000000;
+define symbol __ICFEDIT_region_RAM_end__   = 0x2002FFFF;
+/*-Sizes-*/
+define symbol __ICFEDIT_size_cstack__ = 0x2000;
+define symbol __ICFEDIT_size_heap__   = 0x2000;
+/**** End of ICF editor section. ###ICF###*/
+
+define symbol __region_RAM1_start__ = 0x10000000;
+define symbol __region_RAM1_end__   = 0x1000FFFF;
+
+define memory mem with size = 4G;
+define region ROM_region   = mem:[from __ICFEDIT_region_ROM_start__   to __ICFEDIT_region_ROM_end__];
+define region RAM_region   = mem:[from __ICFEDIT_region_RAM_start__   to __ICFEDIT_region_RAM_end__];
+define region RAM1_region  = mem:[from __region_RAM1_start__   to __region_RAM1_end__];
+
+define block CSTACK    with alignment = 8, size = __ICFEDIT_size_cstack__   { };
+define block HEAP      with alignment = 8, size = __ICFEDIT_size_heap__     { };
+
+initialize by copy { readwrite };
+do not initialize  { section .noinit };
+
+place at address mem:__ICFEDIT_intvec_start__ { readonly section .intvec };
+
+place in ROM_region   { readonly };
+place in RAM_region   { readwrite,
+                        block CSTACK, block HEAP };                        
+place in RAM1_region  { section .sram };
\ No newline at end of file
diff --git a/EWARM/iar/GD32F450xE_APP.icf b/EWARM/iar/GD32F450xE_APP.icf
new file mode 100644
index 0000000..67e4732
--- /dev/null
+++ b/EWARM/iar/GD32F450xE_APP.icf
@@ -0,0 +1,35 @@
+/*###ICF### Section handled by ICF editor, don't touch! ****/
+/*-Editor annotation file-*/
+/* IcfEditorFile="$TOOLKIT_DIR$\config\ide\IcfEditor\cortex_v1_0.xml" */
+/*-Specials-*/
+define symbol __ICFEDIT_intvec_start__ = 0x08010000;
+/*-Memory Regions-*/
+define symbol __ICFEDIT_region_ROM_start__ = 0x08010000;
+define symbol __ICFEDIT_region_ROM_end__   = 0x0807FFFF;
+define symbol __ICFEDIT_region_RAM_start__ = 0x20000000;
+define symbol __ICFEDIT_region_RAM_end__   = 0x2002FFFF;
+/*-Sizes-*/
+define symbol __ICFEDIT_size_cstack__ = 0x2000;
+define symbol __ICFEDIT_size_heap__   = 0x2000;
+/**** End of ICF editor section. ###ICF###*/
+
+define symbol __region_RAM1_start__ = 0x10000000;
+define symbol __region_RAM1_end__   = 0x1000FFFF;
+
+define memory mem with size = 4G;
+define region ROM_region   = mem:[from __ICFEDIT_region_ROM_start__   to __ICFEDIT_region_ROM_end__];
+define region RAM_region   = mem:[from __ICFEDIT_region_RAM_start__   to __ICFEDIT_region_RAM_end__];
+define region RAM1_region  = mem:[from __region_RAM1_start__   to __region_RAM1_end__];
+
+define block CSTACK    with alignment = 8, size = __ICFEDIT_size_cstack__   { };
+define block HEAP      with alignment = 8, size = __ICFEDIT_size_heap__     { };
+
+initialize by copy { readwrite };
+do not initialize  { section .noinit };
+
+place at address mem:__ICFEDIT_intvec_start__ { readonly section .intvec };
+
+place in ROM_region   { readonly };
+place in RAM_region   { readwrite,
+                        block CSTACK, block HEAP };                        
+place in RAM1_region  { section .sram };
\ No newline at end of file
diff --git a/GD32F4xx_Firmware_Library/GD32F4xx_standard_peripheral/Source/gd32f4xx_i2c.c b/GD32F4xx_Firmware_Library/GD32F4xx_standard_peripheral/Source/gd32f4xx_i2c.c
index 2972073..32b949b 100644
--- a/GD32F4xx_Firmware_Library/GD32F4xx_standard_peripheral/Source/gd32f4xx_i2c.c
+++ b/GD32F4xx_Firmware_Library/GD32F4xx_standard_peripheral/Source/gd32f4xx_i2c.c
@@ -244,9 +244,9 @@ void i2c_master_addressing(uint32_t i2c_periph, uint32_t addr, uint32_t trandire
 {
     /* master is a transmitter or a receiver */
     if(I2C_TRANSMITTER == trandirection) {
-        addr = addr & I2C_TRANSMITTER;
+        addr = addr & I2C_TRANSMITTER;//1110
     } else {
-        addr = addr | I2C_RECEIVER;
+        addr = addr | I2C_RECEIVER;//0001
     }
     /* send slave address */
     I2C_DATA(i2c_periph) = addr;
diff --git a/applications/main/main.c b/applications/main/main.c
index ce1d499..523d6b5 100644
--- a/applications/main/main.c
+++ b/applications/main/main.c
@@ -38,8 +38,10 @@ OF SUCH DAMAGE.
 #include "rtservice.h"
 #include "drv_adc.h"
 #include "mb85rc64.h"
-#include "tmp75.h"
+// #include "tmp75.h"
 #include "drv_usart.h"
+#include "drv_i2c.h"
+
 
 float voltage;
 float current;
@@ -78,31 +80,34 @@ int main(void)
         
     // 其他应用程序初始化代码...
 
-    __enable_irq();
-    gd32_usart_init();
+    // __enable_irq();
 
+
+    // gd32_usart_init();
+
+    i2c_init();
     adc_init();
-    temp75_gpio_init();
+    // temp75_gpio_init();
 
 
 	//测试mb铁电读写
 	memset(&ttest, 0, sizeof(ttest));
-	// mb85rc64_page_write();
-	mb85rc64_add_read(MB85TEST_ADD, (unsigned char *)&ttest, sizeof(ttest));
-    ttest.status = 0;
-	ttest.ttt++;
-    if (ttest.ggg >= 1000)
-    {
-        ttest.ggg -= 2;
-        ttest.ggg /= 3;
-    }
-    else
-    {
-        ttest.ggg += 2;
-        ttest.ggg *= 3;
-    }
+    
+	// mb85rc64_add_read(MB85TEST_ADD, (unsigned char *)&ttest, sizeof(ttest));
+    // ttest.status = 0;
+	// ttest.ttt++;
+    // if (ttest.ggg >= 1000)
+    // {
+    //     ttest.ggg -= 2;
+    //     ttest.ggg /= 3;
+    // }
+    // else
+    // {
+    //     ttest.ggg += 2;
+    //     ttest.ggg *= 3;
+    // }
 
-	mb85rc64_page_write(MB85TEST_ADD, (unsigned char *)&ttest, sizeof(ttest));
+	// mb85rc64_page_write(MB85TEST_ADD, (unsigned char *)&ttest, sizeof(ttest));
 
     // 进入主循环或启动其他任务
     while (1) 
@@ -121,11 +126,10 @@ int main(void)
         #endif
         
 		//测试mb铁电读写
-        read_mb_id((uint8_t*)&tiedian_id);//读取铁电ID
+        // read_mb_id((uint8_t*)&tiedian_id);//读取铁电ID
 
 		memset(&ttest, 0, sizeof(ttest));
-		// mb85rc64_page_write();
-		mb85rc64_add_read(MB85TEST_ADD, (unsigned char *)&ttest, sizeof(ttest));
+		// mb85rc64_add_read(MB85TEST_ADD, (unsigned char *)&ttest, sizeof(ttest));
     	ttest.tmperature = ptz_temperature_collect_tmp75_task();
 
         // usart_puts(ttest.ttt);
diff --git a/doc/sbaa588a.pdf b/doc/sbaa588a.pdf
new file mode 100644
index 0000000..5910c42
Binary files /dev/null and b/doc/sbaa588a.pdf differ
diff --git a/doc/tmp75.pdf b/doc/tmp75.pdf
new file mode 100644
index 0000000..47a9873
Binary files /dev/null and b/doc/tmp75.pdf differ
diff --git a/drivers/drv_adc.c b/drivers/drv_adc.c
index 344d3fe..3119a30 100644
--- a/drivers/drv_adc.c
+++ b/drivers/drv_adc.c
@@ -302,7 +302,28 @@ float ptz_Current_collect_adc1_task()
 /* 温度采集 */
 float ptz_temperature_collect_tmp75_task()
 {
-    tmp75[tmp75_num] = tmp75_read_temp();
+	uint8_t tempHL[2];
+	uint16_t tempCode = 0;
+	float temp = 0;
+
+	i2c_read(tempHL, 2);
+    // tmp75[tmp75_num] = tmp75_read_temp();
+	tempCode = (tempHL[0] << 8) | tempHL[1];
+	tempCode = tempCode >> 6;
+
+	if (tempCode & 0x200) // 负温度
+	{
+		tempCode &= 0x1ff;
+		temp = ((float)tempCode - 512) / 4;
+	}
+	else
+	{
+		temp = (float)tempCode / 4;
+	}
+
+	tmp75[tmp75_num] = temp;
+	// tmp75[tmp75_num] = tmp75_read_temp();
+
     tmp75_num ++;
 
     if(tmp75_num >= LB_T_TIMES)
diff --git a/drivers/drv_adc.h b/drivers/drv_adc.h
index 8534fd4..0191e01 100644
--- a/drivers/drv_adc.h
+++ b/drivers/drv_adc.h
@@ -1,7 +1,8 @@
 #ifndef __DRV_ADC_H_
 #define __DRV_ADC_H_  
 
-#include "tmp75.h"
+// #include "tmp75.h"
+#include "drv_i2c.h"
 #include "stdlib.h"
 #include "stdbool.h"
 #include "string.h"
diff --git a/drivers/drv_i2c.c b/drivers/drv_i2c.c
index 990543a..6409cdb 100644
--- a/drivers/drv_i2c.c
+++ b/drivers/drv_i2c.c
@@ -16,16 +16,16 @@ All rights reserved.
 #include "rtthread.h"
 #include <core_cm4.h>
 
-/*
-  @ brief  延时函数
-  @ param
-  @ return
-  @ note   2025-09-15
-*/
-static void delay_us(int us)
-{
-    rt_thread_udelay(us);
-}
+// /*
+//   @ brief  延时函数
+//   @ param
+//   @ return
+//   @ note   2025-09-15
+// */
+// static void delay_us(int us)
+// {
+//     rt_thread_udelay(us);
+// }
 
 void i2c_init(void)
 {
@@ -53,7 +53,9 @@ void i2c_config(void)
 {
     // 启用 I2C 外设的时钟
 	rcu_periph_clock_enable(RCU_I2C0);
- 
+
+  	i2c_deinit(I2C_PERIPH);
+
     // 配置 I2C 的时钟参数：
     // I2C_PERIPH：这里使用的I2C1
     // I2C_SPEED：通信速率（单位为 Hz，常用为 100000 或 400000），这里使用100000
@@ -62,60 +64,104 @@ void i2c_config(void)
     // 配置 I2C 工作模式和地址：
     // I2C_ADDFORMAT_7BITS：使用 7 位地址模式
     // I2C_BUS_ADDRESS：SD2068器件代码0110010 = 0x32
-    i2c_mode_addr_config(I2C_PERIPH, I2C_I2CMODE_ENABLE, I2C_ADDFORMAT_7BITS, I2C_BUS_ADDRESS);
- 
-    // 启用 I2C 外设
-    i2c_enable(I2C_PERIPH);
+    i2c_mode_addr_config(I2C_PERIPH, I2C_I2CMODE_ENABLE, I2C_ADDFORMAT_7BITS, TMP75_ADDRESS);
+
  
     // 使能 ACK 应答功能，确保在接收数据后自动发送 ACK
     i2c_ack_config(I2C_PERIPH, I2C_ACK_ENABLE);
+
+    // 启用 I2C 外设
+    i2c_enable(I2C_PERIPH);
+
 }
 
-/*
-  @ brief  读取温度值
-  @ param
-  @ return
-  @ note  2025-09-15 
-*/
-float tmp75_read_temp(void)
+
+
+void i2c_write(uint8_t *buff, int len)
 {
-  uint8_t tempH = 0;
-  uint8_t tempL = 0;
-  uint16_t tempCode = 0;
-  float temp = 0;
-
-  // 起始信号
-  i2c_start();
-  // 写tmp75地址
-  tmp75_write_byte(TMP75_ADDRESS);
-  // 接收tmp75的ack信息
-  tmp75_ack();
-  // 发送需读取数据的地址
-  tmp75_write_byte(TEMP_REGISTER_ADDRESS);
-  tmp75_ack();
-
-  i2c_start();
-  // 写tmp75地址
-  tmp75_write_byte(TMP75_ADDRESS + 1); // 读地址数据
-  tmp75_ack();
-  tempH = tmp75_read_byte();
-  master_ack();
-  tempL = tmp75_read_byte();
-  master_noack();
-  i2c_stop();
-
-  tempCode = (tempH << 8) | tempL;
-  tempCode = tempCode >> 6;
-  if (tempCode & 0x200) // 负温度
-  {
-    tempCode &= 0x1ff;
-    temp = ((float)tempCode - 512) / 4;
-  }
-  else
-  {
-    temp = (float)tempCode / 4;
-  }
-  TMP75_SDA_LOW;
-  TMP75_SCL_LOW;
-  return (temp);
+    /* 等待总线空闲 */
+    while(i2c_flag_get(I2C_PERIPH, I2C_FLAG_I2CBSY));
+    /* 发送起始条件 */
+    i2c_start_on_bus(I2C_PERIPH);
+    /* 等待起始条件已发送标志 */
+    while(!i2c_flag_get(I2C_PERIPH, I2C_FLAG_SBSEND));
+    /* 发送从机地址（写模式） */
+    i2c_master_addressing(I2C_PERIPH, TMP75_ADDRESS, I2C_TRANSMITTER);
+    /* 等待地址已发送标志 */
+    while(!i2c_flag_get(I2C_PERIPH, I2C_FLAG_ADDSEND));
+    /* 清除地址发送标志 */
+    i2c_flag_clear(I2C_PERIPH, I2C_FLAG_ADDSEND);
+    
+    for(int i = 0; i < len; i++)
+    {
+        /* 等待发送数据缓冲区为空 */
+        while(!i2c_flag_get(I2C_PERIPH, I2C_FLAG_TBE));
+        /* 发送一个字节数据 */
+        i2c_data_transmit(I2C_PERIPH, buff[i]);
+    }
+    /* 等待数据传输完成 */
+    while(!i2c_flag_get(I2C_PERIPH, I2C_FLAG_TBE));
+    /* 发送停止条件 */
+    i2c_stop_on_bus(I2C_PERIPH);
+    /* 等待停止条件发送完成 */
+    while(I2C_CTL0(I2C_PERIPH) & I2C_CTL0_STOP); // 检查STPDET位或类似标志
+}
+
+//接收1字节数据
+void i2c_read(uint8_t *buff, uint16_t len)
+{
+	/* 等待I2C总线空闲 */
+    while(i2c_flag_get(I2C_PERIPH, I2C_FLAG_I2CBSY));
+    /* 向I2C总线发送启动信号 */
+    i2c_start_on_bus(I2C_PERIPH);
+    /* 等待，直到设置SBSEND位 */
+	while(!i2c_flag_get(I2C_PERIPH, I2C_FLAG_SBSEND));//设置主机发送启动条件
+	
+	/* 将从机地址发送到I2C总线 */
+    i2c_master_addressing(I2C_PERIPH, TMP75_ADDRESS, I2C_RECEIVER);//设置主机接收
+	/* 等待地址位被设置 */
+    while(!i2c_flag_get(I2C_PERIPH, I2C_FLAG_ADDSEND));
+    /* 清除地址位 */
+    i2c_flag_clear(I2C_PERIPH, I2C_FLAG_ADDSEND);
+	
+	/* 使能ACK（多个字节接收时需要应答） */
+	i2c_ack_config(I2C_PERIPH, I2C_ACK_ENABLE);
+
+    /* 5. 接收数据 */
+    if(len > 1)
+    {
+        /* 使能ACK（多个字节接收时需要应答） */
+        i2c_ack_config(I2C_PERIPH, I2C_ACK_ENABLE);
+        
+        for(int i = 0; i < len; i++)
+        {
+            if(i == (len - 1))
+            {
+                /* 最后一个字节前禁用ACK */
+                i2c_ack_config(I2C_PERIPH, I2C_ACK_DISABLE);
+            }
+            
+            /* 等待RBNE标志（接收缓冲区非空） */
+            while(!i2c_flag_get(I2C_PERIPH, I2C_FLAG_RBNE));
+            
+            /* 读取数据 */
+            buff[i] = i2c_data_receive(I2C_PERIPH);
+        }
+    }
+    else
+    {
+        /* 单字节接收：直接禁用ACK */
+        i2c_ack_config(I2C_PERIPH, I2C_ACK_DISABLE);
+        
+        /* 等待RBNE标志 */
+        while(!i2c_flag_get(I2C_PERIPH, I2C_FLAG_RBNE));
+        
+        /* 读取数据 */
+        buff[0] = i2c_data_receive(I2C_PERIPH);
+    }
+
+		/* 发送停止信号 */
+    i2c_stop_on_bus(I2C_PERIPH);
+    /* 等待停止信号完成 */
+    while(I2C_CTL0(I2C_PERIPH) & I2C_CTL0_STOP);
 }
diff --git a/drivers/drv_i2c.h b/drivers/drv_i2c.h
index 5ecf346..2151062 100644
--- a/drivers/drv_i2c.h
+++ b/drivers/drv_i2c.h
@@ -16,13 +16,16 @@
 #include "gd32f4xx_gpio.h"
 #include "gd32f4xx_i2c.h"
 
-
-
 #define I2C_PERIPH      I2C0
 #define I2C_SCL_PIN     GPIO_PIN_6
 #define I2C_SDA_PIN     GPIO_PIN_7
 #define I2C_SPEED       100000
 
+#define TMP75_ADDRESS   0x48        //1001000
+// #define TMP75_ADDRESS   0x09
+#define TEMP_REGISTER_ADDRESS  0x00  //mcu作为从机时被寻址的地址
+
+
 // #define I2C_SCL_HIGH  gpio_bit_set(GPIOB, I2C_SCL_PIN)
 // #define I2C_SCL_LOW   gpio_bit_reset(GPIOB, I2C_SCL_PIN)
 
@@ -34,8 +37,10 @@
 void i2c_init(void);
 void i2c_gpio_config(void);
 void i2c_config(void);
+void i2c_write(uint8_t *buff, int len);
+void i2c_read(uint8_t *buff, uint16_t len);
 
-void temp75_gpio_init();
-float tmp75_read_temp(void);
+// void temp75_gpio_init();
+// float tmp75_read_temp(void);
 
 #endif
\ No newline at end of file
diff --git a/drivers/mb85rc64/mb85rc64.c b/drivers/mb85rc64/mb85rc64.c
index f177c40..80f33a0 100644
--- a/drivers/mb85rc64/mb85rc64.c
+++ b/drivers/mb85rc64/mb85rc64.c
@@ -26,27 +26,27 @@ static void delay_us(int us)
   rt_thread_udelay(us);
 }
 
-/*
-  @ brief  оƬ��ʼ��
-  @ param  
-  @ return
-  @ note  2022-05-26
-*/
-void mb85rc64_gpio_init()
-{
-  //��������ʱ��
-  rcu_periph_clock_enable(RCU_GPIOB);
-  //��������Ϊ���ģʽ:PB6
-  gpio_mode_set(GPIOB, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO_PIN_6);
-  gpio_output_options_set(GPIOB, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_6);
+// /*
+//   @ brief  оƬ��ʼ��
+//   @ param  
+//   @ return
+//   @ note  2022-05-26
+// */
+// void mb85rc64_gpio_init()
+// {
+//   //��������ʱ��
+//   rcu_periph_clock_enable(RCU_GPIOB);
+//   //��������Ϊ���ģʽ:PB6
+//   gpio_mode_set(GPIOB, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO_PIN_6);
+//   gpio_output_options_set(GPIOB, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_6);
   
-  //��������PB7���ģʽ
-  gpio_mode_set(GPIOB, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO_PIN_7);
-  gpio_output_options_set(GPIOB, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_7);
+//   //��������PB7���ģʽ
+//   gpio_mode_set(GPIOB, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO_PIN_7);
+//   gpio_output_options_set(GPIOB, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_7);
   
-  MB85RC64_SCL_HIGH;
-  MB85RC64_SDA_HIGH;
-}
+//   MB85RC64_SCL_HIGH;
+//   MB85RC64_SDA_HIGH;
+// }
 
 /*
   @ brief  ����SDA����Ϊ���ģʽ
diff --git a/drivers/mb85rc64/mb85rc64.h b/drivers/mb85rc64/mb85rc64.h
index ea29f04..dd3ad7b 100644
--- a/drivers/mb85rc64/mb85rc64.h
+++ b/drivers/mb85rc64/mb85rc64.h
@@ -15,6 +15,9 @@
 
 #include "gd32f4xx_gpio.h"
 
+#define MB85RC64_ADDRESS   0x50
+
+
 #define MB85RC64_ADDRESS_WRITE   0xA0
 #define MB85RC64_ADDRESS_READ    0xA1
 //mb85rc64�洢��ַ
@@ -29,10 +32,9 @@
 #define MB85RC64_SDA_GET   gpio_input_bit_get(GPIOB, GPIO_PIN_7)
 
 
-void mb85rc64_gpio_init();
+// void mb85rc64_gpio_init();
 char mb85rc64_page_write(unsigned short int addr, unsigned char* data, int data_len);
 char mb85rc64_add_read(unsigned short int addr, unsigned char *data, int data_len);
-void mb85rc64_function_test();
 void read_mb_id(uint8_t* buff);
 
 #endif
\ No newline at end of file
diff --git a/drivers/tmp75/tmp75.c b/drivers/tmp75/tmp75.c
index b907cf6..4364c47 100644
--- a/drivers/tmp75/tmp75.c
+++ b/drivers/tmp75/tmp75.c
@@ -224,16 +224,16 @@ float tmp75_read_temp(void)
   // ��ʼ�ź�
   i2c_start();
   // дtmp75��ַ
-  tmp75_write_byte(TMP75_ADDRESS);
+  tmp75_write_byte(TMP75_ADDRESS);//д ���� ����
   // ����tmp75��ack��Ϣ
   tmp75_ack();
   // �������ȡ���ݵĵ�ַ
-  tmp75_write_byte(TEMP_REGISTER_ADDRESS);
+  tmp75_write_byte(TEMP_REGISTER_ADDRESS);// д��ַ 0x00
   tmp75_ack();
 
   i2c_start();
   // дtmp75��ַ
-  tmp75_write_byte(TMP75_ADDRESS + 1); // ����ַ����
+  tmp75_write_byte(TMP75_ADDRESS + 1); // �� ���� ����
   tmp75_ack();
   tempH = tmp75_read_byte();
   master_ack();