读取电流电压

Lib/ina226.c

@@ -3,7 +3,7 @@
 static float CurrentLSB; // 电流分辨率
 
 void
-INA226_Init (uint16_t r_shunt, float max_current)
+INA226_Init (float r_shunt, float max_current)
 {
   uint16_t cal = 0;
 
@@ -25,14 +25,14 @@ INA226_WriteReg (uint8_t reg, uint16_t value)
   uint8_t data_t[2];
   data_t[0] = (uint8_t)(value >> 8);
   data_t[1] = (uint8_t)(value & 0xFF);
-  IIC_WriteBytes (INA226_ADDR, reg, data_t, 2); // 需适配您的I2C驱动
+  IIC_WriteBytes (INA226_ADDR, reg, data_t, 2);
 }
 // 寄存器读取函数
 uint16_t
 INA226_ReadReg (uint8_t reg)
 {
   uint8_t data_t[2];
-  IIC_ReadBytes (INA226_ADDR, reg, data_t, 2); // 需适配您的I2C驱动
+  IIC_ReadBytes (INA226_ADDR, reg, data_t, 2);
   return (data_t[0] << 8) | data_t[1];
 }
 
@@ -58,4 +58,5 @@ INA226_ReadPower (void)
 {
   int16_t raw = (int16_t)INA226_ReadReg (POWER_REG);
   return raw * 25 * CurrentLSB; // P=25×CurrentLSB×raw
+//   return raw  * CurrentLSB; // 实测结果偏大
 }

Lib/ina226.h

@@ -19,7 +19,7 @@
 #define INA226_ADDR 0x80
 
 // 函数声明
-void INA226_Init (uint16_t r_shunt, float max_current);
+void INA226_Init (float r_shunt, float max_current);
 void INA226_WriteReg (uint8_t reg, uint16_t value);
 uint16_t INA226_ReadReg (uint8_t reg);
 

Src/main.c

@@ -22,9 +22,11 @@ SystemClock_Init (void)
 void
 main ()
 {
-  u8 addr;
-  u16 read_i = 0;
-  u16 adder = 0;
+  u16 ina226_voltage = 0;
+  u16 ina226_current = 0;
+  u16 ina226_power = 0;
+
+  u16 loop_counter = 0;
 
   SystemClock_Init (); // 时钟配置
 
@@ -40,7 +42,7 @@ main ()
   OLED_Init ();
 
   printf ("INA226_Init()\r\n");
-  INA226_Init (0x0A, 0.05f);
+  INA226_Init (0.005f, 2.0f);
 
   DelayMs (100); // 初始化延时
 
@@ -63,34 +65,26 @@ main ()
 
   while (1)
     {
-      adder++;
+      loop_counter++;
 
-      OLED_ShowNum (8, 2, adder, 10, OLED_FONT_SIXTEEN, OLED_LEFT_ROLL,
+      OLED_ShowNum (8, 0, loop_counter, 10, OLED_FONT_SIXTEEN, OLED_LEFT_ROLL,
+                    OLED_SHOW);
+
+      ina226_voltage = (int16_t)(INA226_ReadBusVoltage () * 1000);
+
+      OLED_ShowNum (4, 2, ina226_voltage, 10, OLED_FONT_SIXTEEN, OLED_LEFT_ROLL,
+                    OLED_SHOW);
+
+      ina226_current = (int16_t)(INA226_ReadCurrent () * 1000);
+      OLED_ShowNum (4, 4, ina226_current, 10, OLED_FONT_SIXTEEN,
+                    OLED_LEFT_ROLL, OLED_SHOW);
+
+      ina226_power = (int16_t)(INA226_ReadPower () * 1000);
+      OLED_ShowNum (4, 6, ina226_power, 10, OLED_FONT_SIXTEEN, OLED_LEFT_ROLL,
                     OLED_SHOW);
 
       DelayMs (1000);
 
-      read_i = (int16_t)(INA226_ReadBusVoltage () * 1000);
-
-      OLED_ShowNum (4, 6, read_i, 10, OLED_FONT_SIXTEEN, OLED_LEFT_ROLL,
-                    OLED_SHOW);
-
-      printf ("Scanning I2C bus...\r\n");
-
-      for (addr = 0x08; addr <= 0x78; addr++)
-        { // 有效地址范围
-          IIC_Start ();
-          IIC_SendByte (addr << 1); // 发送写命令
-          if (IIC_WaitAck ())
-            {
-              printf ("Device found at: 0x%02X\n", addr);
-            }
-          IIC_Stop ();
-          DelayMs (1);
-        }
-
-      printf ("Scan complete.\n");
-      DelayMs (1000);
     }
 }