100 lines
3.6 KiB
C
100 lines
3.6 KiB
C
/*---------------------------------------------------------------------*/
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/* --- STC MCU Limited ------------------------------------------------*/
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/* --- STC 1T Series MCU Demo Programme -------------------------------*/
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/* --- Mobile: (86)13922805190 ----------------------------------------*/
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/* --- Fax: 86-0513-55012956,55012947,55012969 ------------------------*/
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/* --- Tel: 86-0513-55012928,55012929,55012966 ------------------------*/
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/* --- Web: www.STCMCU.com --------------------------------------------*/
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/* --- Web: www.STCMCUDATA.com ---------------------------------------*/
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/* --- QQ: 800003751 -------------------------------------------------*/
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/* 如果要在程序中使用此代码,请在程序中注明使用了STC的资料及程序 */
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/*---------------------------------------------------------------------*/
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#include "adc.h"
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//========================================================================
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// 函数: void ADC_Inilize(ADC_InitTypeDef *ADCx)
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// 描述: ADC初始化程序.
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// 参数: ADCx: 结构参数,请参考adc.h里的定义.
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// 返回: none.
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// 版本: V1.0, 2012-10-22
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//========================================================================
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void ADC_Inilize(ADC_InitTypeDef *ADCx)
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{
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ADCCFG = (ADCCFG & ~ADC_SPEED_2X16T) | ADCx->ADC_Speed;
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if(ADCx->ADC_Power == ENABLE) ADC_CONTR |= 0x80;
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else ADC_CONTR &= 0x7F;
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if(ADCx->ADC_AdjResult == ADC_RIGHT_JUSTIFIED) ADCCFG |= (1<<5); //AD转换结果右对齐。
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else ADCCFG &= ~(1<<5); //AD转换结果左对齐。
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if(ADCx->ADC_Interrupt == ENABLE) EADC = 1; //中断允许 ENABLE,DISABLE
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else EADC = 0;
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if(ADCx->ADC_Priority > Priority_3) return; //错误
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ADC_Priority(ADCx->ADC_Priority); //指定中断优先级(低到高) Priority_0,Priority_1,Priority_2,Priority_3
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if(ADCx->ADC_SMPduty > 31) return; //错误
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if(ADCx->ADC_CsSetup > 1) return; //错误
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if(ADCx->ADC_CsHold > 3) return; //错误
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P_SW2 |= 0x80;
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ADCTIM = (ADCx->ADC_CsSetup << 7) | (ADCx->ADC_CsHold << 5) | ADCx->ADC_SMPduty ; //设置 ADC 内部时序，ADC采样时间建议设最大值
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P_SW2 &= 0x7f;
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}
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//========================================================================
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// 函数: void ADC_PowerControl(u8 pwr)
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// 描述: ADC电源控制程序.
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// 参数: pwr: 电源控制,ENABLE或DISABLE.
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// 返回: none.
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// 版本: V1.0, 2012-10-22
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//========================================================================
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void ADC_PowerControl(u8 pwr)
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{
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if(pwr == ENABLE) ADC_CONTR |= 0x80;
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else ADC_CONTR &= 0x7f;
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}
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//========================================================================
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// 函数: u16 Get_ADCResult(u8 channel)
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// 描述: 查询法读一次ADC结果.
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// 参数: channel: 选择要转换的ADC.
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// 返回: ADC结果.
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// 版本: V1.0, 2012-10-22
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//========================================================================
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u16 Get_ADCResult(u8 channel) //channel = 0~15
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{
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u16 adc;
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u8 i;
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if(channel > ADC_CH15) return 4096; //错误,返回4096,调用的程序判断
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ADC_RES = 0;
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ADC_RESL = 0;
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ADC_CONTR = (ADC_CONTR & 0xf0) | ADC_START | channel;
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NOP(10); //对ADC_CONTR操作后等待会儿再访问
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for(i=0; i<250; i++) //超时
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{
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if(ADC_CONTR & ADC_FLAG)
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{
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ADC_CONTR &= ~ADC_FLAG;
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if(ADCCFG & (1<<5)) //转换结果右对齐。
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{
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adc = ((u16)ADC_RES << 8) | ADC_RESL;
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}
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else //转换结果左对齐。
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{
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#if ADC_RES_12BIT==1
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adc = (u16)ADC_RES;
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adc = (adc << 4) | ((ADC_RESL >> 4)&0x0f);
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#else
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adc = (u16)ADC_RES;
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adc = (adc << 2) | ((ADC_RESL >> 6)&0x03);
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#endif
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}
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return adc;
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}
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}
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return 4096; //错误,返回4096,调用的程序判断
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}
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