ADC模数转换实验
1 AD 转换原理介绍
2 F28335的ADC介绍
3 ADC配置步骤
4 硬件设计
5 软件设计
#include "adc.h"void ADC_Init(void)
{// Specific clock setting for this example:EALLOW;SysCtrlRegs.PCLKCR0.bit.ADCENCLK = 1; // ADCEDIS;// Specific clock setting for this example:EALLOW;SysCtrlRegs.HISPCP.all = ADC_MODCLK; // HSPCLK = SYSCLKOUT/(2*ADC_MODCLK)EDIS;InitAdc(); // For this example, init the ADC// Specific ADC setup for this example:AdcRegs.ADCTRL1.bit.ACQ_PS = ADC_SHCLK;AdcRegs.ADCTRL3.bit.ADCCLKPS = ADC_CKPS;AdcRegs.ADCTRL1.bit.SEQ_CASC = 1; // 1 Cascaded modeAdcRegs.ADCCHSELSEQ1.bit.CONV00 = 0x0;AdcRegs.ADCTRL1.bit.CONT_RUN = 1; // Setup continuous runAdcRegs.ADCMAXCONV.bit.MAX_CONV1 = 0x0;// Start SEQ1AdcRegs.ADCTRL2.all = 0x2000;}Uint16 Read_ADCValue(void)
{while (AdcRegs.ADCST.bit.INT_SEQ1== 0);AdcRegs.ADCST.bit.INT_SEQ1_CLR = 1;return AdcRegs.ADCRESULT0>>4;
}
#ifndef ADC_H_
#define ADC_H_#include "DSP2833x_Device.h" // DSP2833x 头文件
#include "DSP2833x_Examples.h" // DSP2833x 例子相关头文件#define ADC_MODCLK 3
#define ADC_CKPS 0x1 // ADC module clock = HSPCLK/2*ADC_CKPS = 25.0MHz/(1*2) = 12.5MHz
#define ADC_SHCLK 0xf // S/H width in ADC module periods = 16 ADC clocksvoid ADC_Init(void);
Uint16 Read_ADCValue(void);#endif /* ADC_H_ */
#include "DSP2833x_Device.h" // DSP2833x Headerfile Include File
#include "DSP2833x_Examples.h" // DSP2833x Examples Include File#include "leds.h"
#include "time.h"
#include "smg.h"
#include "adc.h"/*******************************************************************************
* 函 数 名 : main
* 函数功能 : 主函数
* 输 入 : 无
* 输 出 : 无
*******************************************************************************/
void main()
{int i=0;float adc_vol;InitSysCtrl();InitPieCtrl();IER = 0x0000;IFR = 0x0000;InitPieVectTable();LED_Init();TIM0_Init(150,200000);//200msSMG_Init();ADC_Init();while(1){adc_vol=(float)Read_ADCValue()*3.0/4096;SMG_DisplayFloat(adc_vol,2);
// SMG_DisplayInt(Read_ADCValue());}
}
