mirror of
https://github.com/ghsecuritylab/ameba_ws2812b.git
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57 lines
1.7 KiB
C
57 lines
1.7 KiB
C
/*
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* Routines to access hardware
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*
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* Copyright (c) 2013 Realtek Semiconductor Corp.
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*
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* This module is a confidential and proprietary property of RealTek and
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* possession or use of this module requires written permission of RealTek.
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*/
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#ifndef _HAL_PWM_H_
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#define _HAL_PWM_H_
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#define MAX_PWM_CTRL_PIN 4
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// the minimum tick time for G-timer is 61 us (clock source = 32768Hz, reload value=1 and reload takes extra 1T)
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#define GTIMER_TICK_US 31 // micro-second, 1000000/32768 ~= 30.5
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#define MIN_GTIMER_TIMEOUT 61 // in micro-sec, use this value to set the g-timer to generate tick for PWM. 61=(1000000/32768)*2
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#define PWM_GTIMER_TICK_TIME 61 // in micro-sec, use this value to set the g-timer to generate tick for PWM. 61=(1000000/32768)*2
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typedef struct _HAL_PWM_ADAPTER_ {
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u8 pwm_id; // the PWM ID, 0~3
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u8 sel; // PWM Pin selection, 0~3
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u8 gtimer_id; // using G-Timer ID, there are 7 G-timer, but we prefer to use timer 3~6
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u8 enable; // is enabled
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// u32 timer_value; // the G-Timer auto-reload value, source clock is 32768Hz, reload will takes extra 1 tick. To set the time of a tick of PWM
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u32 tick_time; // the tick time for the G-timer
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u32 period; // the period of a PWM control cycle, in PWM tick
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u32 pulsewidth; // the pulse width in a period of a PWM control cycle, in PWM tick. To control the ratio
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// float duty_ratio; // the dyty ratio = pulswidth/period
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}HAL_PWM_ADAPTER, *PHAL_PWM_ADAPTER;
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extern HAL_Status
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HAL_Pwm_Init(
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u32 pwm_id,
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u32 sel
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);
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extern void
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HAL_Pwm_Enable(
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u32 pwm_id
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);
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extern void
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HAL_Pwm_Disable(
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u32 pwm_id
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);
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extern void
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HAL_Pwm_SetDuty(
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u32 pwm_id,
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u32 period,
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u32 pulse_width
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);
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#endif
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