257 lines
6.8 KiB
C
257 lines
6.8 KiB
C
/********************************** (C) COPYRIGHT *******************************
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* File Name : CH59x_adc.c
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* Author : WCH
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* Version : V1.2
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* Date : 2021/11/17
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* Description
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*********************************************************************************
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* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
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* Attention: This software (modified or not) and binary are used for
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* microcontroller manufactured by Nanjing Qinheng Microelectronics.
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*******************************************************************************/
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#include "CH59x_common.h"
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/*********************************************************************
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* @fn ADC_DataCalib_Rough
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*
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* @brief 采样数据粗调,获取偏差值,必须先配置ADC后调用此函数获取校准值
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*
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* @param none
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*
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* @return 偏差
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*/
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signed short ADC_DataCalib_Rough(void) // 采样数据粗调,获取偏差值
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{
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uint16_t i;
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uint32_t sum = 0;
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uint8_t ch = 0; // 备份通道
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uint8_t cfg = 0; // 备份
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ch = R8_ADC_CHANNEL;
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cfg = R8_ADC_CFG;
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R8_ADC_CFG |= RB_ADC_OFS_TEST; // 进入测试模式
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R8_ADC_CFG &= ~RB_ADC_DIFF_EN; // 关闭差分
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R8_ADC_CONVERT |= RB_ADC_START;
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while(R8_ADC_CONVERT & RB_ADC_START);
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for(i = 0; i < 16; i++)
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{
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R8_ADC_CONVERT |= RB_ADC_START;
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while(R8_ADC_CONVERT & RB_ADC_START);
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sum += (~R16_ADC_DATA) & RB_ADC_DATA;
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}
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sum = (sum + 8) >> 4;
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R8_ADC_CFG = cfg; // 恢复配置值
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R8_ADC_CHANNEL = ch;
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return (2048 - sum);
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}
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/*********************************************************************
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* @fn ADC_ExtSingleChSampInit
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*
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* @brief 外部信号单通道采样初始化
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*
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* @param sp - refer to ADC_SampClkTypeDef
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* @param ga - refer to ADC_SignalPGATypeDef
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*
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* @return none
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*/
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void ADC_ExtSingleChSampInit(ADC_SampClkTypeDef sp, ADC_SignalPGATypeDef ga)
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{
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R8_TKEY_CFG &= ~RB_TKEY_PWR_ON;
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R8_ADC_CFG = RB_ADC_POWER_ON | RB_ADC_BUF_EN | (sp << 6) | ((ga&0xF) << 4);
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if( ga & ADC_PGA_2_ )
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{
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R8_ADC_CONVERT |= RB_ADC_PGA_GAIN2;
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}
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else
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{
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R8_ADC_CONVERT &= ~RB_ADC_PGA_GAIN2;
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}
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}
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/*********************************************************************
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* @fn ADC_ExtDiffChSampInit
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*
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* @brief 外部信号差分通道采样初始化
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*
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* @param sp - refer to ADC_SampClkTypeDef
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* @param ga - refer to ADC_SignalPGATypeDef
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*
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* @return none
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*/
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void ADC_ExtDiffChSampInit(ADC_SampClkTypeDef sp, ADC_SignalPGATypeDef ga)
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{
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R8_TKEY_CFG &= ~RB_TKEY_PWR_ON;
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R8_ADC_CFG = RB_ADC_POWER_ON | RB_ADC_DIFF_EN | (sp << 6) | ((ga&0xF) << 4);
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if( ga & ADC_PGA_2_ )
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{
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R8_ADC_CONVERT |= RB_ADC_PGA_GAIN2;
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}
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else
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{
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R8_ADC_CONVERT &= ~RB_ADC_PGA_GAIN2;
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}
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}
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/*********************************************************************
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* @fn ADC_InterTSSampInit
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*
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* @brief 内置温度传感器采样初始化
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*
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* @param none
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*
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* @return none
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*/
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void ADC_InterTSSampInit(void)
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{
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R8_TKEY_CFG &= ~RB_TKEY_PWR_ON;
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R8_TEM_SENSOR = RB_TEM_SEN_PWR_ON;
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R8_ADC_CHANNEL = CH_INTE_VTEMP;
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R8_ADC_CFG = RB_ADC_POWER_ON | RB_ADC_DIFF_EN | (3 << 4);
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R8_ADC_CONVERT &= ~RB_ADC_PGA_GAIN2;
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}
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/*********************************************************************
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* @fn ADC_InterBATSampInit
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*
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* @brief 内置电池电压采样初始化
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*
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* @param none
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*
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* @return none
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*/
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void ADC_InterBATSampInit(void)
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{
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R8_TKEY_CFG &= ~RB_TKEY_PWR_ON;
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R8_ADC_CHANNEL = CH_INTE_VBAT;
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R8_ADC_CFG = RB_ADC_POWER_ON | RB_ADC_BUF_EN | (0 << 4); // 使用-12dB模式
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R8_ADC_CONVERT &= ~RB_ADC_PGA_GAIN2;
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}
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/*********************************************************************
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* @fn TouchKey_ChSampInit
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*
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* @brief 触摸按键通道采样初始化
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*
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* @param none
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*
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* @return none
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*/
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void TouchKey_ChSampInit(void)
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{
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R8_ADC_CFG = RB_ADC_POWER_ON | RB_ADC_BUF_EN | (ADC_PGA_0 << 4) | (SampleFreq_8 << 6);
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R8_ADC_CONVERT &= ~RB_ADC_PGA_GAIN2;
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R8_TKEY_CFG |= RB_TKEY_PWR_ON;
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}
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/*********************************************************************
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* @fn ADC_ExcutSingleConver
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*
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* @brief ADC执行单次转换
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*
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* @param none
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*
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* @return ADC转换后的数据
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*/
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uint16_t ADC_ExcutSingleConver(void)
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{
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R8_ADC_CONVERT |= RB_ADC_START;
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while(R8_ADC_CONVERT & RB_ADC_START);
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return (R16_ADC_DATA & RB_ADC_DATA);
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}
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/*********************************************************************
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* @fn TouchKey_ExcutSingleConver
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*
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* @brief TouchKey转换后数据
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*
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* @param charg - Touchkey充电时间,5bits有效, t=charg*Tadc
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* @param disch - Touchkey放电时间,3bits有效, t=disch*Tadc
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*
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* @return 当前TouchKey等效数据
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*/
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uint16_t TouchKey_ExcutSingleConver(uint8_t charg, uint8_t disch)
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{
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R8_TKEY_COUNT = (disch << 5) | (charg & 0x1f);
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R8_TKEY_CONVERT = RB_TKEY_START;
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while(R8_TKEY_CONVERT & RB_TKEY_START);
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return (R16_ADC_DATA & RB_ADC_DATA);
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}
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/*********************************************************************
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* @fn ADC_AutoConverCycle
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*
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* @brief 设置连续 ADC的周期
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*
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* @param cycle - 采样周期计算方法为(256-cycle)*16*Tsys
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*
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* @return none
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*/
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void ADC_AutoConverCycle(uint8_t cycle)
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{
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R8_ADC_AUTO_CYCLE = cycle;
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}
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/*********************************************************************
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* @fn ADC_DMACfg
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*
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* @brief 配置DMA功能
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*
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* @param s - 是否打开DMA功能
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* @param startAddr - DMA 起始地址
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* @param endAddr - DMA 结束地址
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* @param m - 配置DMA模式
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*
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* @return none
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*/
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void ADC_DMACfg(uint8_t s, uint32_t startAddr, uint32_t endAddr, ADC_DMAModeTypeDef m)
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{
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if(s == DISABLE)
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{
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R8_ADC_CTRL_DMA &= ~(RB_ADC_DMA_ENABLE | RB_ADC_IE_DMA_END);
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}
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else
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{
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R16_ADC_DMA_BEG = startAddr&0xFFFF;
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R16_ADC_DMA_END = endAddr&0xFFFF;
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if(m)
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{
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R8_ADC_CTRL_DMA |= RB_ADC_DMA_LOOP | RB_ADC_IE_DMA_END | RB_ADC_DMA_ENABLE;
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}
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else
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{
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R8_ADC_CTRL_DMA &= ~RB_ADC_DMA_LOOP;
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R8_ADC_CTRL_DMA |= RB_ADC_IE_DMA_END | RB_ADC_DMA_ENABLE;
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}
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}
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}
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/*********************************************************************
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* @fn adc_to_temperature_celsius
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*
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* @brief Convert ADC value to temperature(Celsius)
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*
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* @param adc_val - adc value
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*
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* @return temperature (Celsius)
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*/
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int adc_to_temperature_celsius(uint16_t adc_val)
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{
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uint32_t C25 = 0;
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int temp;
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C25 = (*((PUINT32)ROM_CFG_TMP_25C));
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/* current temperature = standard temperature + (adc deviation * adc linearity coefficient) */
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temp = (((C25 >> 16) & 0xFFFF) ? ((C25 >> 16) & 0xFFFF) : 25) + \
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(adc_val - ((int)(C25 & 0xFFFF))) * 100 / 283;
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return (temp);
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}
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