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不吃油炸鸡
2026-03-02 20:19:29 +08:00
parent ad705013c6
commit 9824725084
1 changed files with 6 additions and 4 deletions
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10
software/Power_Pico/Core/Src/adc.c
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@@ -39,6 +39,8 @@ static uint8_t low_underload_cnt = 0;
static uint8_t is_transition_next = 0; // 标记下一包是否为过渡数据 static uint8_t is_transition_next = 0; // 标记下一包是否为过渡数据
// 用于监视数据更新的计数器 // 用于监视数据更新的计数器
static uint32_t monitor_chunk_counter = 0; static uint32_t monitor_chunk_counter = 0;
// uA 单位的偏置电流 (仅仅用于UI示数的)
float cur_bias_uA = -0.0;
/* USER CODE END 0 */ /* USER CODE END 0 */
@@ -221,7 +223,7 @@ void HAL_ADC_MspDeInit(ADC_HandleTypeDef* adcHandle)
static void Data_Monitor_Update(uint16_t vol_adc, uint16_t cur_adc, uint16_t ref_adc, uint8_t range) static void Data_Monitor_Update(uint16_t vol_adc, uint16_t cur_adc, uint16_t ref_adc, uint8_t range)
{ {
// 1. 计算电压 (mV) // 1. 计算电压 (mV)
// V = (ADC_Value / 4095) * 3.0V * (10k + 1k) / 1k // V = (ADC_Value / 4095) * 3.0V * (1000k + 100k) / 100k
// mV = ADC_Value * (3000.0 / 4095 * 11) // mV = ADC_Value * (3000.0 / 4095 * 11)
float voltage_mv = (float)vol_adc * (3000.0f / 4095.0f * 11.0f); float voltage_mv = (float)vol_adc * (3000.0f / 4095.0f * 11.0f);
@@ -241,12 +243,12 @@ static void Data_Monitor_Update(uint16_t vol_adc, uint16_t cur_adc, uint16_t ref
break; break;
} }
// 3. 计算电压引入的误差电流 (单位: 10nA) // 3. 计算电压采样分压电阻引入的误差电流 (单位: 10nA)
float error_current_10na = voltage_mv / 11.0f; float error_current_10na = voltage_mv / 11.0f ; // mV 除以 1.1MΩ
// 4. 计算最终校正后的电流 // 4. 计算最终校正后的电流
// 注意：误差电流是正的，所以要从测量值中减去 // 注意：误差电流是正的，所以要从测量值中减去
float final_current_10na = current_10na - error_current_10na; float final_current_10na = current_10na - error_current_10na + cur_bias_uA*100.0f;
// 5. 累加数据 (此函数在中断上下文中被调用，Data_Monitor_Get_Values会处理中断保护) // 5. 累加数据 (此函数在中断上下文中被调用，Data_Monitor_Get_Values会处理中断保护)
g_data_monitor.sum_vol_mv += (uint64_t)voltage_mv; g_data_monitor.sum_vol_mv += (uint64_t)voltage_mv;