工程目录：AiPi-Open-Kits/ AiPi-Eyes-DU
文件目录：AiPi-Open-Kits/ AiPi-Eyes-DU / main.c
AiPi-Eyes_DU PWM呼吸灯一、使用指南实现RGB三色灯循环呼吸亮灭 main 工程代码：
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#include "bflb_mtimer.h" //引入定时器库 #include "bflb_pwm_v2.h" //引入PWM库 #include "bflb_clock.h" //引入时钟库 #include "bflb_gpio.h" //引入GPIO库 #include "board.h" //引入开发板库
struct bflb_device_s *pwm; struct bflb_device_s *gpio; int main(void) //主程序 { int i; // 定义一个整型变量 i board_init(); // 开发板初始化
pwm = bflb_device_get_by_name("pwm_v2_0"); gpio = bflb_device_get_by_name("gpio");
/*初始化RGB灯，IO15、12、14，对应蓝灯、红灯、绿灯*/ bflb_gpio_init(gpio, GPIO_PIN_15, GPIO_FUNC_PWM0 | GPIO_ALTERNATE | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_1); bflb_gpio_init(gpio, GPIO_PIN_12, GPIO_FUNC_PWM0 | GPIO_ALTERNATE | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_1); bflb_gpio_init(gpio, GPIO_PIN_14, GPIO_FUNC_PWM0 | GPIO_ALTERNATE | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_1);
/* period = .XCLK / .clk_div / .period = 40MHz / 40 / 1000 = 1KHz */ struct bflb_pwm_v2_config_s cfg = { .clk_source = BFLB_SYSTEM_XCLK, .clk_div = 40, .period = 1000, };
/*初始化PWM输出*/ bflb_pwm_v2_init(pwm, &cfg); bflb_pwm_v2_start(pwm);
/*功能实现，红、绿、蓝灯依次呼吸循环亮灭*/ while (1) {
//红灯呼吸亮灭 bflb_pwm_v2_channel_positive_start(pwm, PWM_CH0); for(i=100;i>0;i--) //for循环100次 i-- 等于 i = i-1 { bflb_pwm_v2_channel_set_threshold(pwm, PWM_CH0, i, 100); bflb_mtimer_delay_ms(10); //延时10ms } for(i=1;i<100;i++) //for循环100次 i++ 等于 i = i+1 { bflb_pwm_v2_channel_set_threshold(pwm, PWM_CH0, i, 100); bflb_mtimer_delay_ms(10);//延时10ms } bflb_pwm_v2_channel_positive_stop(pwm, PWM_CH0);
//绿灯呼吸亮灭 bflb_pwm_v2_channel_positive_start(pwm, PWM_CH2); for(i=100;i>0;i--) { bflb_pwm_v2_channel_set_threshold(pwm, PWM_CH2, i, 100); bflb_mtimer_delay_ms(10); //延时10ms } for(i=1;i<100;i++) { bflb_pwm_v2_channel_set_threshold(pwm, PWM_CH2, i, 100); bflb_mtimer_delay_ms(10); //延时10ms } bflb_pwm_v2_channel_positive_stop(pwm, PWM_CH2);
//蓝灯循环亮灭 bflb_pwm_v2_channel_positive_start(pwm, PWM_CH3); for(i=100;i>0;i--) { bflb_pwm_v2_channel_set_threshold(pwm, PWM_CH3, i, 100); bflb_mtimer_delay_ms(10); //延时10ms } for(i=1;i<100;i++) { bflb_pwm_v2_channel_set_threshold(pwm, PWM_CH3, i, 100); bflb_mtimer_delay_ms(10); } bflb_pwm_v2_channel_positive_stop(pwm, PWM_CH3); }
}
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