116 lines
3.6 KiB
C
116 lines
3.6 KiB
C
/********************************** (C) COPYRIGHT *******************************
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* File Name : main.c
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* Author : WCH
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* Version : V1.0.0
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* Date : 2021/06/06
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* Description : Main program body.
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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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/*
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*@Note
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Touchkey detection routine:
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This example demonstrates channel 2 (PA2), which is a Touchkey application.
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*/
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#include "debug.h"
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/* Global define */
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/*********************************************************************
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* @fn Touch_Key_Init
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*
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* @brief Initializes Touch Key collection.
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*
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* @return none
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*/
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void Touch_Key_Init(void)
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{
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GPIO_InitTypeDef GPIO_InitStructure={0};
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ADC_InitTypeDef ADC_InitStructure={0};
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE );
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE );
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RCC_ADCCLKConfig(RCC_PCLK2_Div8);
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
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ADC_InitStructure.ADC_ScanConvMode = DISABLE;
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ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
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ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
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ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
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ADC_InitStructure.ADC_NbrOfChannel = 1;
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ADC_Init(ADC1, &ADC_InitStructure);
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ADC_Cmd(ADC1, ENABLE);
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TKey1->CTLR1 |= (1<<26)|(1<<24); // Enable TouchKey and Buffer
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}
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/*********************************************************************
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* @fn Touch_Key_Adc
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*
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* @brief Returns ADCx conversion result data.
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*
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* @param ch - ADC channel.
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* ADC_Channel_0 - ADC Channel0 selected.
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* ADC_Channel_1 - ADC Channel1 selected.
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* ADC_Channel_2 - ADC Channel2 selected.
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* ADC_Channel_3 - ADC Channel3 selected.
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* ADC_Channel_4 - ADC Channel4 selected.
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* ADC_Channel_5 - ADC Channel5 selected.
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* ADC_Channel_6 - ADC Channel6 selected.
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* ADC_Channel_7 - ADC Channel7 selected.
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* ADC_Channel_8 - ADC Channel8 selected.
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* ADC_Channel_9 - ADC Channel9 selected.
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* ADC_Channel_10 - ADC Channel10 selected.
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* ADC_Channel_11 - ADC Channel11 selected.
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* ADC_Channel_12 - ADC Channel12 selected.
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* ADC_Channel_13 - ADC Channel13 selected.
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* ADC_Channel_14 - ADC Channel14 selected.
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* ADC_Channel_15 - ADC Channel15 selected.
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* ADC_Channel_16 - ADC Channel16 selected.
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* ADC_Channel_17 - ADC Channel17 selected.
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*
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* @return val - The Data conversion value.
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*/
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u16 Touch_Key_Adc(u8 ch)
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{
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ADC_RegularChannelConfig(ADC1, ch, 1, ADC_SampleTime_7Cycles5 );
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TKey1->IDATAR1 =0x10; //Charging Time
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TKey1->RDATAR =0x8; //Discharging Time
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while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC ));
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return (uint16_t) TKey1->RDATAR;
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}
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/*********************************************************************
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* @fn main
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*
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* @brief Main program.
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*
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* @return none
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*/
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int main(void)
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{
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u16 ADC_val;
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Delay_Init();
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USART_Printf_Init(115200);
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printf("SystemClk:%d\r\n",SystemCoreClock);
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Touch_Key_Init();
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while(1)
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{
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ADC_val = Touch_Key_Adc(ADC_Channel_2);
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printf("TouckKey Value:%d\r\n",ADC_val);
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Delay_Ms(500);
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}
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}
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