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该例程使用PWM从引脚的输出来作为测试信号源，可以在ISR服务程序中设置中断来观察中断情况，由于这里不方便录制视频，运行效果就不上传了，直接上代码：

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1 main.c文件代码：

/* ======================================== * * Copyright YOUR COMPANY, THE YEAR * All Rights Reserved * UNPUBLISHED, LICENSED SOFTWARE. * * CONFIDENTIAL AND PROPRIETARY INFORMATION * WHICH IS THE PROPERTY OF your company. * 说明：PSoc4自带PWM模块测试引脚中断输入功能 * 1. 中断输入引脚 ----- P0.7 * 2. PWM输出引脚 ----- P2.7 * 3. LED指示引脚 ----- P0.2 * * * 注:如果工程编译报错请用工程目录下"如果工程 * 报错请用该文档内容替换INT_PinIOin.c中所有内 * 容"文件按文件名要求替换指定文件内容. * ======================================== */ #include int main() { /* Place your initialization/startup code here (e.g. MyInst_Start()) */ INT_PinIOin_Start(); PWM_1_Start(); CyGlobalIntEnable; /* CyGlobalIntEnable; */ /* Uncomment this line to enable global interrupts. */ for(;;) { /* Place your application code here. */ } } /* [] END OF FILE */

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2. ISR函数

/******************************************************************************* * Function Name: INT_PinIOin_Interrupt ******************************************************************************** * * Summary: * The default Interrupt Service Routine for INT_PinIOin. * * Add custom code between the coments to keep the next version of this file * from over writting your code. * * Parameters: * None * * Return: * None * *******************************************************************************/ CY_ISR(INT_PinIOin_Interrupt) { /* Place your Interrupt code here. */ /* `#START INT_PinIOin_Interrupt` */ if(Dig_Out_Read()) { INTOUT_Write(0); } else { INTOUT_Write(1); } INT_PinIOin_ClearPending(); INT_in_ClearInterrupt(); /* `#END` */ }

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接好外部的跳线后，运行该程序的效果是绿色LED灯闪烁，附上工程代码如下：

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