87 lines
2.3 KiB
C
87 lines
2.3 KiB
C
/*
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* Copyright (c) 2006-2018, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2017-09-06 勤为本 first version
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*/
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#ifndef __OPENLOONGSON_PWM_H
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#define __OPENLOONGSON_PWM_H
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// pwm引脚定义
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#define LS1C_PWM0_GPIO06 (6) // gpio06用作pwm0
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#define LS1C_PWM0_GPIO04 (4) // gpio04复用为pwm0
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#define LS1C_PWM1_GPIO92 (92) // gpio92用作pwm1
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#define LS1C_PWM1_GPIO05 (5) // gpio05复用为pwm1
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#define LS1C_PWM2_GPIO52 (52) // gpio52复用为pwm2
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#define LS1C_PWM2_GPIO46 (46) // gpio46复用为pwm2
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#define LS1C_PWM3_GPIO47 (47) // gpio47复用为pwm3
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#define LS1C_PWM3_GPIO53 (53) // gpio53复用为pwm3
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// ...还有一些gpio可以复用为gpio的，有需要可以自己添加
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// pwm控制寄存器的每个bit
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#define LS1C_PWM_INT_LRC_EN (11) // 低脉冲计数器中断使能
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#define LS1C_PWM_INT_HRC_EN (10) // 高脉冲计数器中断使能
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#define LS1C_PWM_CNTR_RST (7) // 使能CNTR计数器清零
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#define LS1C_PWM_INT_SR (6) // 中断状态位
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#define LS1C_PWM_INTEN (5) // 中断使能位
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#define LS1C_PWM_SINGLE (4) // 单脉冲控制位
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#define LS1C_PWM_OE (3) // 脉冲输出使能
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#define LS1C_PWM_CNT_EN (0) // 主计数器使能
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// 硬件pwm工作模式
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enum
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{
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// 正常模式--连续输出pwm波形
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PWM_MODE_NORMAL = 0,
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// 单脉冲模式，每次调用只发送一个脉冲，调用间隔必须大于pwm周期
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PWM_MODE_PULSE
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};
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// 硬件pwm信息
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typedef struct
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{
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unsigned int gpio; // PWMn所在的gpio
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unsigned int mode; // 工作模式(单脉冲、连续脉冲)
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float duty; // pwm的占空比
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unsigned long period_ns; // pwm周期(单位ns)
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}pwm_info_t;
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/*
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* 初始化PWMn
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* @pwm_info PWMn的详细信息
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*/
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void pwm_init(pwm_info_t *pwm_info);
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/*
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* 禁止pwm
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* @pwm_info PWMn的详细信息
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*/
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void pwm_disable(pwm_info_t *pwm_info);
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/*
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* 使能PWM
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* @pwm_info PWMn的详细信息
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*/
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void pwm_enable(pwm_info_t *pwm_info);
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#endif
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