56 lines
2.4 KiB
C
56 lines
2.4 KiB
C
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/********************************** (C) COPYRIGHT *******************************
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* File Name : Main.C
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* Author : WCH
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* Version : V1.0
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* Date : 2017/01/20
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* Description : CH554 PWM初始化，占空比设置，PWM默认电平设置
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支持中断方式修改PWM占空比
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*******************************************************************************/
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#include "..\Public\CH554.H"
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#include "..\Public\Debug.H"
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#include "PWM.H"
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#include "stdio.h"
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#pragma NOAREGS
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main( )
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{
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CfgFsys( ); //CH554时钟选择配置
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mDelaymS(5); //配置时钟后，建议延时稳定时钟
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mInitSTDIO( ); //串口0初始化
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printf("start ...\n");
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P1_MOD_OC &= ~(bPWM1 | bPWM2); //设置PWM引脚为推挽输出
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P1_DIR_PU |= bPWM1 | bPWM2;
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SetPWMClk(4); //PWM时钟配置 ，4分频
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ForceClearPWMFIFO( ); //强制清除PWM FIFO和COUNT
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CancleClearPWMFIFO( ); //取消清除PWM FIFO和COUNT
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PWM1OutEnable( ); //允许PWM1输出
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PWM2OutEnable( ); //允许PWM2输出
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PWM1OutPolarHighAct( ); //PWM1输出默认低，高有效
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PWM2OutPolarLowAct( ); //PWM2输出默认高，低有效
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#if PWM_INTERRUPT
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PWMInterruptEnable();
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EA = 1;
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SetPWM1Dat(0x10);
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SetPWM2Dat(0x40);
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while(1);
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#endif
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SetPWM1Dat(0x10); //占空比0x10/256
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SetPWM2Dat(0x40);
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while(1){
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if(PWM_CTRL&bPWM_IF_END){
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PWM_CTRL |= bPWM_IF_END; //清除PWM中断
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SetPWM1Dat(0x10);
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SetPWM2Dat(0x40);
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#ifdef DE_PRINTF
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printf("PWM_CYC_END %02X\n",(UINT16)PWM_CTRL);
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#endif
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}
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}
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} |