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TMS320F28027: 使用IQ计算的时候发现不能开PWM2中断

Part Number: TMS320F28027


PWM2中断是50us一次,IQ就是简单的乘法与加法运算,且IQ程序已做验证可以正常运行

问题如下:

1.使能PWM2的时候即enablePWMCLKCounting();发现串口printf打印速度慢几乎一秒一个字符但串口输出内容是对的,并且IQ程序也慢

2.当屏蔽函数enablePWMCLKCounting();串口printf与IQ计算正常,串口打印速度非常快?

请教下这是什么问题?谢谢!