是一个用vhdl语言编写的pwm程序，可以方便地用来和nios连接，实现对nios的功能扩展。-is a VHDL language with the PWM procedures can be used to facilitate connections and nios, nios to achieve a functional extension.
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avalon_slave_pwm_source inc HAL avalon_slave_pwm.v hello_2pwm.c pwm.v reg_file.v
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