a090b4f1ea21001e16fea2237907c44c

自己编写的PWM模块

#include "altera_avalon_pwm_regs.h"

#define ALTERA_AVALON_PWM_TYPE (volatile unsigned int*)

int altera_avalon_pwm_init(unsigned int address, unsigned int clock_divider, unsigned int duty_cycle);
int altera_avalon_pwm_enable(unsigned int address);
int altera_avalon_pwm_disable(unsigned int address);
int altera_avalon_pwm_change_duty_cycle(unsigned int address, unsigned int duty_cycle);

//Return Codes
#define ALTERA_AVALON_PWM_OK                                          0
#define ALTERA_AVALON_PWM_DUTY_CYCLE_GREATER_THAN_CLOCK_CYCLE_ERROR  -1
#define ALTERA_AVALON_PWM_ENABLED_CONFIRMATION_ERROR 	             -2
#define ALTERA_AVALON_PWM_DISABLED_CONFIRMATION_ERROR 	             -3

//Constants
#define ALTERA_AVALON_PWM_ENABLED  1
#define ALTERA_AVALON_PWM_DISABLED 0