pwm_device = (struct rt_device_pwm)rt_device_find(BEEP_PWM_DEVICE); if (pwm_device == RT_NULL) { rt_kprintf("pwm device %s not found!n", BEEP_PWM_DEVICE); return -RT_ERROR; } return 0; } int beep_on(void) { rt_pwm_enable(pwm_device, BEEP_PWM_CH); //使能蜂鸣器对应的 PW...
rt_kprintf("pwm sample run failed! can't find %s device!\n", PWM_DEV_NAME); return RT_ERROR; } /设置PWM周期和脉冲宽度默认值/ rt_pwm_set(pwm_dev, PWM_DEV_CHANNEL, period, pulse); rt_pwm_set(pwm_dev, 1, period, pulse); /使能设备/ rt_pwm_enable(pwm_dev, PWM_DEV_CHANNEL); ...
if (pwm_dev == RT_NULL) { rt_kprintf("pwm sample run failed! can't find %s device!n", PWM_DEV_NAME); return RT_ERROR; } /设置PWM周期和脉冲宽度默认值/ rt_pwm_set(pwm_dev, PWM_DEV_CHANNEL, period, pulse); /使能设备/ rt_pwm_enable(pwm_dev, PWM_DEV_CHANNEL); while (1) {...
「rtt中定时器配置」分别复制cubemx文件夹里main.c中的TIM3 init function和stm32h7xx_hal_msp.c中的void HAL_TIM_PWM_MspInit(TIM_HandleTypeDef* tim_pwmHandle);void HAL_TIM_MspPostInit(TIM_HandleTypeDef* timHandle);void HAL_TIM_PWM_MspDeInit(TIM_HandleTypeDef* tim_pwmHandle); TIM_HandleTypeDef h...
rt_pwm_enable(pwm_dev_b, PWM_DEV_CHANNEL_B); while (1) { for (r =0 ; r < 8; r++) { if (dir_r) { pulse_r += 81920; /* 从0值开始每次增加81920ns */ } else { pulse_r -= 81920; /* 从最大值开始每次减少81920ns */ ...
rt_pwm_set(pwm4_dev, 4, 10000, 0);//设置占空比,参数:1.句柄 2.通道 3.x时钟/周期(数值越大频率越低) 4.占空比 rt_pwm_enable(pwm4_dev, 4);//使能 7.使用PWM: rt_pwm_set(pwm4_dev, 4, 10000, 0);//设置占空比,参数:1.句柄 2.通道 3.x时钟/周期(数值越大频率越低) 4.占空比 ...
PWM LED使用 UART使用 下面再添加一个按键的功能包即可。 MultiButton 是一个小巧简单易用的事件驱动型按键驱动模块,可无限量扩展按键,按键事件的回调异步处理方式可以简化你的程序结构,去除冗余的按键处理硬编码,非常好用。
通用驱动中一般有两个关键的数据结构:rt_pwm_ops把通过驱动操作外设完成功能的代码注册到设备树中。还有多个自定义数据结构用于记录MCU外设的配置和运行时所需数据。 PWM驱动代码只有一个入口函数hc32_pwm_control,通过命令字提供操作一共有四种操作:PWM_CMD_ENABLE、PWM_CMD_DISABLE、PWM_CMD_SET、PWM_CMD_GET。分...
kPWM_ReloadPwmFullCycle;// 全周期更新/* PWM A & PWM B operate as 2 independent channels */pwmConfig.pairOperation = kPWM_Independent;// PWMA,PWMB各自独立输出pwmConfig.enableDebugMode =true;// 使能工作在 DEBUG模式/* Initialize submodule 1 */if(PWM_Init(PWM2, kPWM_Module_1, &pwmConfig...
#define PWM_CMD_ENABLE (128 + 0) //使能PWM #define PWM_CMD_SET (128 + 1) //设置PWM参数...