LPC1788的ADC和DAC使用

#ifndef __ADC1_H_

#define __ADC1_H_

#include "common.h"

#include "delay.h"

void adc_init(u8 ch,u8 div);

u16 adc_cover(u8 ch);

#endif

#include "adc1.h"

void adc_init(u8 ch,u8 div)//最大时钟不得大于12.4M

{

//打开ADC和IO口时钟

LPC_SC->PCONP|=(1<<15)|(1<<12);

switch(ch)

{

case0:

LPC_IOCON->P0_23=0x00;

LPC_IOCON->P0_23|=(1<<0)|(1<<8)|(1<<10);//无过滤 模拟adc 开漏

break;

case1:

LPC_IOCON->P0_24=0x00;

LPC_IOCON->P0_24|=(1<<0)|(1<<8)|(1<<10);//无过滤 模拟adc 开漏

break;

case2:

LPC_IOCON->P0_25=0x00;

LPC_IOCON->P0_25|=(1<<0)|(1<<8)|(1<<10);//无过滤 模拟adc 开漏

break;

case3:

LPC_IOCON->P0_26=0x00;

LPC_IOCON->P0_26|=(1<<0)|(1<<8)|(1<<10);//无过滤 模拟adc 开漏

break;

case4:

LPC_IOCON->P0_30=0x00;

LPC_IOCON->P0_30|=(3<<0)|(1<<8)|(1<<10);//无过滤 模拟adc 开漏

break;

case5:

LPC_IOCON->P0_31=0x00;

LPC_IOCON->P0_31|=(3<<0)|(1<<8)|(1<<10);//无过滤 模拟adc 开漏

break;

case6:

LPC_IOCON->P0_12=0x00;

LPC_IOCON->P0_12|=(3<<0)|(1<<8)|(1<<10);//无过滤 模拟adc 开漏

break;

case7:

LPC_IOCON->P0_13=0x00;

LPC_IOCON->P0_13|=(3<<0)|(1<<8)|(1<<10);//无过滤 模拟adc 开漏

break;

}

LPC_ADC->CR=0X00;

LPC_ADC->CR|=(1<

LPC_ADC->INTEN=0x00;//禁用全部中断

}

u16 adc_cover(u8 ch)

{

u16 temp;

LPC_ADC->CR&=~(0x000000ff);

LPC_ADC->CR|=(1<

LPC_ADC->CR|=1<<24;//启动转换

while(!(LPC_ADC->GDR&(1u<<31)));//等待转换结束

temp=(u16)((LPC_ADC->GDR&0x00000fff0)>>4);

returntemp;

}

#ifndef __ADC_H_

#define __ADC_H_

#include "common.h"

#define DAC_IO_CON LPC_IOCON->P0_26

void dac_init(void);

void dac_set_value(u16 value);

#endif

#include "dac.h"

void dac_init(void)

{

//io口初始化

DAC_IO_CON=0x00;

DAC_IO_CON|=(2<<0)|(1<<16)/*|(1<<10)*/;//使能DAC

LPC_DAC->CTRL=0x00;//双缓冲禁止,超时禁止 DMA禁止

LPC_DAC->CR=1<<16;

// LPC_DAC->CNTVAL = 100;

}

void dac_set_value(u16 value)

{

if(value>1024)

{

return;

}

else

{

LPC_DAC->CR=(u16)((1<<16)|(value<<6));

}

}