184 lines
4.3 KiB
C
184 lines
4.3 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 TP3102
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*
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* @version 1.0
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* @date 2024/03/26 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 2022/08/04 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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/******************************************************************************\
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Variables definitions
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\******************************************************************************/
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uint16_t Vbat_Adc = 0;
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uint16_t Vref_Adc = 311;
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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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* uint16_t ADC_Chn_Data(ADC_CHANNELS_E adc_chn)
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*
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* Description : 获取相应通道的电压ADC值。
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*
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* Arguments : NONE
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* Returns : adc Value (mV)
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* Notes : NONE
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*
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*******************************************************************************
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*/
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uint16_t ADC_Chn_Data(ADC_CHANNELS_E adc_chn)
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{
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uint8_t index = 0;
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uint16_t adc_data = 0;
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uint16_t adc_plus_data = 0;
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SFRADDR = ADC_CTL0;
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SFRDATA = 0x8B; //0x8B--ADC EN; Single mode; ADC CLK divided by 24=460k
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#if 1
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if( adc_chn == ADC_VREF ) //采VREF前，需要先拉低ADC4对应的IO口进行放电。
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{
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SFRADDR = P0_PD; //打开P07的下拉
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SFRDATA |= 0x80;
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ADC_CTL1 = (ADC_CH4 << 4) | 0x01;
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while(ADC_CTL1 & 0x01); //Wait for conversion complete
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ADC_CTL1 = (ADC_VREF << 4) | 0x01;
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SFRADDR = P0_PD; //取消P07的下拉
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SFRDATA &= ~0x80;
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#ifdef _DEBUG_ADC
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printf("adc bug(vref:%d)\r\n",(uint16_t)adc_chn);
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#endif
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}
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#endif
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for(index=0; index<8; index++)
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{
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ADC_CTL1 = (adc_chn << 4) | 0x01; //Channel set and Start conversion
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while(ADC_CTL1 & 0x01); //Wait for conversion complete
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adc_data = ADC_DATL; //Read low byte first! Lock ADC Value.
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adc_data |= (uint16_t)(ADC_DATH << 8);
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adc_plus_data += adc_data;
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#ifdef _DEBUG_ADC
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printf("adc:%d,plus:%d,index:%d.\r\n",(uint16_t)adc_data,(uint16_t)adc_plus_data,(uint16_t)index);
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#endif
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}
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adc_data = adc_plus_data >> 3;
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#ifdef _DEBUG_ADC
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printf("Adc,Vadc:%d,Vadc_plus:%d,adc_chn:%d.\r\n", (uint16_t)adc_data, (uint16_t)adc_plus_data,(uint16_t)adc_chn);
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#endif
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return adc_data;
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}
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/*
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*******************************************************************************
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* uint16_t Vbat_Value(void)
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*
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* Description : Vbat Value.获取电池电压。
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*
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* Arguments : NONE
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* Returns : Vbat Value (mV)
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* Notes : NONE
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*
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*******************************************************************************
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*/
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uint16_t Vbat_Value(void)
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{
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uint16_t n_Vbat_Data = 0;
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n_Vbat_Data = ADC_Chn_Data(ADC_BAT);
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n_Vbat_Data = (uint32_t)(n_Vbat_Data) * VREF * 2 / Vref_Adc;
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#ifdef _DEBUG_ADC
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printf("bat,Vbat:%d.\r\n",(uint16_t)n_Vbat_Data);
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#endif
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return n_Vbat_Data;
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}
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#ifdef NTC_ENABLE
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/*
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*******************************************************************************
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* uint16_t ADC_NTC_Value(void)
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*
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* Description : 获取NTC采样电压
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* Arguments : NONE
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* Returns : ADC Value (mV)
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* Notes : NONE
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*
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*******************************************************************************
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*/
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uint16_t ADC_NTC_Value(void)
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{
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uint16_t adc_data = 0;
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adc_data = ADC_Chn_Data(ADC_CH4);
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#ifdef _DEBUG_ADC
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printf("NTC_adc,Vadc:%d.\r\n", (uint16_t)adc_data);
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#endif
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adc_data = (uint32_t)(adc_data) * VREF / Vref_Adc;
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#ifdef _DEBUG_ADC
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printf("NTC_V,Vadc:%d.\r\n", (uint16_t)adc_data);
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#endif
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return adc_data;
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}
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#endif
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#endif
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