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读取电流电压

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jxh
2025-03-19 17:25:17 +08:00
parent 1b6044ebd1
commit d93e502437
3 changed files with 26 additions and 31 deletions
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7
Lib/ina226.c
View File

@ -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
}

2
Lib/ina226.h
View File

@ -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);