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29 * Copyright 2008 Develer S.r.l. (http://www.develer.com/)
34 * \brief PWM hardware-specific definition
38 * \author Daniele Basile <asterix@develer.com>
41 #ifndef DRV_PWM_AT91_H
42 #define DRV_PWM_AT91_H
44 #include "hw/pwm_map.h"
46 #include <cfg/compiler.h>
47 #include <cfg/macros.h>
52 #define PWM_HW_MAX_PRESCALER_STEP 10
53 #define PWM_HW_MAX_PERIOD 0xFFFF
56 * Type definition for pwm period.
58 typedef uint16_t pwm_period_t;
61 * Structur definition for pwm driver.
63 typedef struct PwmChannel
65 bool duty_zero; ///< True if duty cyle is zero, false otherwise.
66 bool pol; ///< PWM polarty flag.
67 int pwm_pin; ///< PWM pin.
68 reg32_t *mode_reg; ///< PWM mode register.
69 reg32_t *duty_reg; ///< PWM duty cycle register.
70 reg32_t *period_reg; ///< PWM periodic register.
71 reg32_t *update_reg; ///< Update setting register for PWM.
76 void pwm_hw_init(void);
77 void pwm_hw_setFrequency(PwmDev dev, uint32_t freq);
78 void pwm_hw_setDutyUnlock(PwmDev dev, uint16_t duty);
79 void pwm_hw_disable(PwmDev dev);
80 void pwm_hw_enable(PwmDev dev);
81 void pwm_hw_setPolarity(PwmDev dev, bool pol);
82 pwm_period_t pwm_hw_getPeriod(PwmDev dev);
84 #endif /* DRV_ADC_AT91_H */