278 lines
7.6 KiB
C
278 lines
7.6 KiB
C
/*
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******************************************************************************
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*
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* @file adc.c
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* @brief adc module
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* @ic sy8837/8
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*
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* @version 1.0
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* @date 2024/11/01 15:00:40
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* @author Alex Xu
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*
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* Copyright (c) 2013-2099,Tkplusemi Technology Co.,Ltd.
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* All Rights Reserved
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*
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* History:
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* Revision Date Author Desc
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* 1.0.0 2024/11/01 Alex build this file
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******************************************************************************/
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/*_____ I N C L U D E S ____________________________________________________*/
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#include "adc.h"
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#include "system.h"
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#include "sys_tim.h"
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#if ADC_ENABLE
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/******************************************************************************\
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Macro definitions
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\******************************************************************************/
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#define ADC_AVERAGE_CNT 8
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/******************************************************************************\
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Variables definitions
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\******************************************************************************/
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int8_t ADC_Offset_Error; //ADC Offset Error 校准值寄存器
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int8_t Bat_ADC_Offset_Error;
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uint8_t Vor_Isense_Gain_Error;
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uint8_t Vol_Isense_Gain_Error;
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int8_t Vor_Isense_Offset_Error;
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int8_t Vol_Isense_Offset_Error;
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uint8_t ADC_Chn_Num;
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uint16_t g_Value_Adc;
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uint16_t g_Value_Adc_Avg;
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int16_t g_Vntc_Adc;
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int16_t g_pmu_Adc_Ivol;
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int16_t g_pmu_Adc_Ivor;
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int16_t g_Vbat_Adc;
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int16_t g_pmu_Adc_Vout;
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uint8_t g_ADC_Chn;
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uint8_t Adc_Index;
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bit ADC_Cal_Over_Flag;
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/******************************************************************************\
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Functions definitions
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\******************************************************************************/
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/*
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*******************************************************************************
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* void Adc_Init(void)
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*
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* Description : ADC Initialization. --- 系统初始化调用。（ ADC采样转换一次需要19个CLK，一个CLK 4us，转换一次需要76us。）
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ADC采用连续模式，在中断中采样8次后，等待下一个通道使能。在切换通道前取前一个通道的采样值，进行8次平均。
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*
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* Arguments : NONE
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* Returns : NONE
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* Notes : NONE
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*
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*******************************************************************************
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*/
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void Adc_Init(void)
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{
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SFRADDR = MFP_CTL1; //Set P07 As NTC
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SFRDATA |= 0x80;
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SFRADDR = ADC_CTL0; //0B10111101,<0x29>--ADC EN;ADC 2.5V Enable b[4];ADC1 Pullup 100K Enable b[5]; continue mode; ADC CLK divided by 48=230k
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SFRDATA = 0xB5;
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ADC_CTL1 = ( ADC_NTC << 4 ) | 0x01; //Start ADC , Enable ntc Chn.
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SFRADDR = IRQ_EN10; //Enable ADC Interrupt(INT6).
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SFRDATA |= 0x01;
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#if 1
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ADC_Offset_Error = (int8_t)( ( ADC_OFFSET & 0x0F ) - 8 ); //获取ADC Offset Error校准值。
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Bat_ADC_Offset_Error = (int8_t)( ADC_OFFSET >> 4 );
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/* 获取Ivox对应的Offset Error 和Gain Error */
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Vol_Isense_Offset_Error = (int8_t)( ( IVOX_OFFSET & 0x0F ) - 8 ) * 10; //VOX 电流采样 offset 修调。每一个位为 10mV，1000 对应 offset 误差为 0mV，1001 对应 offset误差为 10mV，0111 对应 offset 误差为-10mV
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Vol_Isense_Gain_Error = IVOL_GAIN;
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Vor_Isense_Offset_Error = (int8_t)( ( IVOX_OFFSET >> 4 ) - 8 ) * 10;
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Vor_Isense_Gain_Error = IVOR_GAIN;
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#endif
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EX6 = 1; //ADC IRQ Enable
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}
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/*
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*******************************************************************************
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* void PMU_ADC_Chn_Data(PMU_ADC_CHANNELS_E pmu_Adc_Chn)
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*
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* Description : 设置相应通道的使能。在主循环中按通道设置各个通道的使能,连续模式，进中断8次后，取值，切通道。
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在中断中获取对应的ADC值，减少主函数的阻塞，提升系统性能。
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*
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* Arguments : NONE
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* Returns : NONE
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* Notes : NONE
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*
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*******************************************************************************
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*/
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void PMU_ADC_Chn_Data( PMU_ADC_CHANNELS_E pmu_Adc_Chn )
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{
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if( ADC_Cal_Over_Flag )
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{
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g_Value_Adc_Avg = g_Value_Adc_Avg >> 3;
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/*获取xSen对应的ADC值*/
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switch (g_ADC_Chn)
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{
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case ADC_NTC:
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g_Vntc_Adc = g_Value_Adc_Avg - ADC_Offset_Error; //NTC取码值是否需要处理Offset Error。
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if( g_Vntc_Adc < 0 )
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{
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g_Vntc_Adc = 0;
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}
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break;
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case ADC_IVOL:
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g_Value_Adc_Avg = ( (uint32_t)g_Value_Adc_Avg * 2500 ) >> 10 ; //ADC的LSB = 2500mV / 1024 = 2.44mV
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g_pmu_Adc_Ivol = (int32)( (int16)( g_Value_Adc_Avg - Vol_Isense_Offset_Error ) ) * 100 / (int16)( 500 + 2 * Vol_Isense_Gain_Error ) ; //IVOL电压位VOL的电流放大5倍送给ADC，例如：100mA电流，ADC采样电压为500mV。
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#ifdef _DEBUG_ADC
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// printf("Vol:Adc_Avg:%d,Ivol:%d,Offset_Error:%d,Gain_Error:%d,temp:%d\r\n",(u16)g_Value_Adc_Avg,(u16)g_pmu_Adc_Ivol,(u16)Vol_Isense_Offset_Error,(u16)Vol_Isense_Gain_Error,(u16)( ( g_Value_Adc_Avg - Vol_Isense_Offset_Error ) ));
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#endif
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if( g_pmu_Adc_Ivol < 0 ) //只处理正电流
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{
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g_pmu_Adc_Ivol = 0;
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}
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break;
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case ADC_IVOR:
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g_Value_Adc_Avg = ( (uint32_t)g_Value_Adc_Avg * 2500 ) >> 10 ; //ADC的LSB = 2500mV / 1024 = 2.44mV
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g_pmu_Adc_Ivor = (int32)( (int16)( g_Value_Adc_Avg - Vor_Isense_Offset_Error ) ) * 100 / (int16)( 500 + 2 * Vor_Isense_Gain_Error ) ; //IVOR电压位VOR的电流放大5倍送给ADC，例如：100mA电流，ADC采样电压为500mV。
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#ifdef _DEBUG_ADC
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// printf("Vor:Adc_Avg:%d,Ivor:%d,Offset_Error:%d,Gain_Error:%d,temp:%d\r\n",(u16)g_Value_Adc_Avg,(u16)g_pmu_Adc_Ivor,(u16)Vor_Isense_Offset_Error,(u16)Vor_Isense_Gain_Error,(u16)( ( g_Value_Adc_Avg - Vor_Isense_Offset_Error ) ));
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#endif
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if( g_pmu_Adc_Ivor < 0 ) //只处理正电流
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{
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g_pmu_Adc_Ivor = 0;
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}
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break;
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case ADC_BAT:
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g_Value_Adc_Avg = ((uint32_t)( g_Value_Adc_Avg ) * 2500) >> 10 ; //ADC的LSB = 2500mV / 1024 = 2.44mV
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g_Vbat_Adc = g_Value_Adc_Avg << 1; //VBAT的2分压。
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g_Vbat_Adc += (int32)( ( g_Vbat_Adc * 4 * ( Bat_ADC_Offset_Error - 8 ) ) / 1000 );
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if( g_Vbat_Adc < 0 )
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{
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g_Vbat_Adc = 0;
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}
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break;
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case ADC_VOUT:
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g_Value_Adc_Avg = ( (int32_t)( g_Value_Adc_Avg - ADC_Offset_Error ) * 2500 ) >> 10 ; //ADC的LSB = 2500mV / 1024 = 2.44mV
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g_pmu_Adc_Vout = g_Value_Adc_Avg << 1; //VOUT的2分压。
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if( g_pmu_Adc_Vout <0 )
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{
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g_pmu_Adc_Vout = 0;
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}
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break;
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default:
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break;
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}
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ADC_Cal_Over_Flag = FALSE;
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#ifdef _DEBUG_ADC
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printf("adc chn:%d,adc_value:%d,Ivol:%d,Vbat:%d,Vout:%d,Ivor:%d,Vntc:%d.\r\n",(uint16_t)ADC_Chn_Num,(uint16_t)g_Value_Adc_Avg,(uint16_t)g_pmu_Adc_Ivol,(uint16_t)g_Vbat_Adc,(uint16_t)g_pmu_Adc_Vout,(uint16_t)g_pmu_Adc_Ivor,(uint16_t)g_Vntc_Adc);
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#endif
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}
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else
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{
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g_ADC_Chn = pmu_Adc_Chn;
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ADC_CTL1 = ( pmu_Adc_Chn << 4 ) | 0x01; //ADC Start Enable,Set Channel N Enabel.
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g_Value_Adc_Avg = 0;
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Adc_Index = 0;
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}
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}
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/*
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*******************************************************************************
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* void EX6_ADC_isr(void ) interrupt Interrupt_Vector_IE6
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*
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* Description : System External Intterupt 6 adc Interrupt.
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*
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* Arguments : NONE
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* Returns : NONE
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* Notes : NONE
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*
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*******************************************************************************
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*/
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void EX6_ADC_isr(void) interrupt Interrupt_Vector_IE6
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{
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if(IRQ_FLAG10 & ADC_Data_Ready)
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{
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g_Value_Adc = ADC_DATL; //先取低8位数据，锁定当前ADC采样值。
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g_Value_Adc |= (uint16_t)( ( ADC_DATH & 0x03 ) << 8 );
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if( Adc_Index < ADC_AVERAGE_CNT ) //求均值
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{
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g_Value_Adc_Avg += g_Value_Adc;
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Adc_Index++;
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}
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else
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{
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ADC_Cal_Over_Flag = TRUE;
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ADC_CTL1 &= ~0x01; //Disable ADC.
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}
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}
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IRQ_FLAG10 = ADC_Data_Ready;
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}
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#endif
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