添加硬件I2C

EWARM/Project.ewp

@@ -2230,6 +2230,12 @@
         <file>
             <name>$PROJ_DIR$\..\drivers\drv_adc.h</name>
         </file>
+        <file>
+            <name>$PROJ_DIR$\..\drivers\drv_i2c.c</name>
+        </file>
+        <file>
+            <name>$PROJ_DIR$\..\drivers\drv_i2c.h</name>
+        </file>
         <file>
             <name>$PROJ_DIR$\..\drivers\drv_usart.c</name>
         </file>

EWARM/Project.ewt

@@ -2901,6 +2901,12 @@
         <file>
             <name>$PROJ_DIR$\..\drivers\drv_adc.h</name>
         </file>
+        <file>
+            <name>$PROJ_DIR$\..\drivers\drv_i2c.c</name>
+        </file>
+        <file>
+            <name>$PROJ_DIR$\..\drivers\drv_i2c.h</name>
+        </file>
         <file>
             <name>$PROJ_DIR$\..\drivers\drv_usart.c</name>
         </file>

drivers/drv_i2c.c

@@ -0,0 +1,121 @@
+/*************************************************
+Copyright (c) 2025, 成都赛联科技有限责任公司
+All rights reserved.
+@file        drv_i2c.C
+@brief       drv_i2c驱动程序
+
+@details
+@note
+@author      dufresne
+@date        2025/09/24
+
+@version		v1.0 2025/09/24 初始版本
+*************************************************/
+
+#include "drv_i2c.h"
+#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);
+}
+
+void i2c_init(void)
+{
+    i2c_gpio_config();
+    i2c_config();
+}
+/*
+  @ brief  初始化tmp75芯片GPIO引脚
+  @ param
+  @ return
+  @ note  2025-09-15 
+*/
+void i2c_gpio_config(void)
+{
+	// 配置引脚时钟
+	rcu_periph_clock_enable(RCU_GPIOB);
+
+    gpio_af_set(GPIOB, GPIO_AF_4, I2C_SCL_PIN | I2C_SDA_PIN);
+    /* 初始化GPIO复用功能模式 */
+    gpio_mode_set(GPIOB, GPIO_MODE_AF, GPIO_PUPD_PULLUP, I2C_SCL_PIN | I2C_SDA_PIN);
+    gpio_output_options_set(GPIOB, GPIO_OTYPE_OD, GPIO_OSPEED_50MHZ, I2C_SCL_PIN | I2C_SDA_PIN);
+}
+
+void i2c_config(void)
+{
+    // 启用 I2C 外设的时钟
+	rcu_periph_clock_enable(RCU_I2C0);
+ 
+    // 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
+    i2c_clock_config(I2C_PERIPH, I2C_SPEED, I2C_DTCY_2);
+ 
+    // 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);
+ 
+    // 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);
+}
+
+/*
+  @ brief  读取温度值
+  @ param
+  @ return
+  @ note  2025-09-15 
+*/
+float tmp75_read_temp(void)
+{
+  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);
+}

drivers/drv_i2c.h

@@ -0,0 +1,41 @@
+///Copyright (c) 2022, 四川汇源光通信有限公司 
+///All rights reserved. 
+///@file        drv_i2c.h 
+///@brief       drv_i2c驱动程序
+///
+///@details     
+///@note        
+///@author      dufresne
+///@date        2025/09/24 
+///
+///@version		v1.0 2025/09/24 初始版本
+
+#ifndef DRV_I2C_H
+#define DRV_I2C_H
+
+#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 I2C_SCL_HIGH  gpio_bit_set(GPIOB, I2C_SCL_PIN)
+// #define I2C_SCL_LOW   gpio_bit_reset(GPIOB, I2C_SCL_PIN)
+
+// #define I2C_SDA_HIGH  gpio_bit_set(GPIOB, I2C_SDA_PIN)
+// #define I2C_SDA_LOW   gpio_bit_reset(GPIOB, I2C_SDA_PIN)
+// #define I2C_SDA_GET   gpio_input_bit_get(GPIOB, I2C_SDA_PIN)
+
+
+void i2c_init(void);
+void i2c_gpio_config(void);
+void i2c_config(void);
+
+void temp75_gpio_init();
+float tmp75_read_temp(void);
+
+#endif

drivers/mb85rc64/mb85rc64.h

@@ -17,6 +17,9 @@
 
 #define MB85RC64_ADDRESS_WRITE   0xA0
 #define MB85RC64_ADDRESS_READ    0xA1
+//mb85rc64湔揣華硊
+#define MB85RC64_SAVE_ADDRESS_BEGIN   0x0000
+
 
 #define MB85RC64_SCL_HIGH  gpio_bit_set(GPIOB, GPIO_PIN_6)
 #define MB85RC64_SCL_LOW   gpio_bit_reset(GPIOB, GPIO_PIN_6)
@@ -25,8 +28,6 @@
 #define MB85RC64_SDA_LOW   gpio_bit_reset(GPIOB, GPIO_PIN_7)
 #define MB85RC64_SDA_GET   gpio_input_bit_get(GPIOB, GPIO_PIN_7)
 
-//mb85rc64湔揣華硊
-#define MB85RC64_SAVE_ADDRESS_BEGIN   0x0000
 
 void mb85rc64_gpio_init();
 char mb85rc64_page_write(unsigned short int addr, unsigned char* data, int data_len);

drivers/tmp75/tmp75.c

@@ -207,6 +207,7 @@ static void master_noack()
   TMP75_SCL_LOW;
   delay_us(5);
 }
+
 /*
   @ brief  ¶ÁȡζÈÖµ
   @ param
@@ -239,6 +240,7 @@ float tmp75_read_temp(void)
   tempL = tmp75_read_byte();
   master_noack();
   i2c_stop();
+
   tempCode = (tempH << 8) | tempL;
   tempCode = tempCode >> 6;
   if (tempCode & 0x200) // ¸ºÎ¶È