lujianhao891204 发表于 2017-12-21 15:36 比如你设计时默认灯电流位20MA，那么你要测量每个灯20mA时的正向压降，如果差别很小，那么你这个方案采用单 ... 我已经解决了这个问题，也不存在亮度的问题；思路大致差不多，也是采用定时器做的
Johnson Cao 发表于 2017-6-19 09:32 __interrupt VectorNumber_Vtimch0 void _Sampling_Interrupt(void) { // clear interrupt a ... 我感觉应该他妈的挺简单的，不知道为什么就是搞不出来， 我用的STM32F030C8T6，利用TIM1产生PWM和定时器中断，PWM的频率设置为11KHZ； TIM1->ARR = 2180; TIM1->SC = 1 ; 然后定时器中断将WAV的数据转换成TIM1->CCR1的值； TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure; TIM_OCInitTypeDef TIM_OCInitStructure; GPIO_InitTypeDef GPIO_InitStructure; NVIC_InitTypeDef NVIC_InirStructure; RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA,ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1,ENABLE); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8; //GPIOA.8 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL; GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOA,&GPIO_InitStructure); GPIO_PinAFConfig(GPIOA,GPIO_PinSource8,GPIO_AF_2); //GPIO_AF_2 NVIC_InirStructure.NVIC_IRQChannel = TIM1_BRK_UP_TRG_COM_IRQn; NVIC_InirStructure.NVIC_IRQChannelPriority = 3; NVIC_InirStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InirStructure); //wav采样率 24KHz = 48000KHz/(999+1)(1+1); // 16KHz = 48000KHz/(999+1)(2+1) // 11KHz = 48000KHz/(2180+1)(1+1) TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1; TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM_TimeBaseInitStructure.TIM_Period = 999; // TIM_TimeBaseInitStructure.TIM_Prescaler = 2; //16K TIM_TimeBaseInitStructure.TIM_Period = 2180; TIM_TimeBaseInitStructure.TIM_Prescaler = 1; //11K TIM_TimeBaseInit(TIM1,&TIM_TimeBaseInitStructure); TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //TIM_OCInitStructure.TIM_Pulse = 500; //测试 TIM_OC1Init(TIM1,&TIM_OCInitStructure);//TIM1--CH1 TIM_ITConfig(TIM1,TIM_IT_Update,ENABLE);//更新中断 TIM_Cmd(TIM1,ENABLE); TIM_CtrlPWMOutputs(TIM1,ENABLE);//
忘记一切Q 发表于 2017-5-26 10:11 不是有例子吗？？ 感谢；标准库的 帮助文档里面确实有；我都没想到去看 加一句 RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE); 就可以了
任风吹吹 发表于 2017-3-17 16:09 内部HSI是16M，F4Cube库内的示例代码应该是用的外部8M HSE，这明显不一样，再者，虽然NUCLEO板上MCU默认没 ... @brief System Clock Configuration * The system Clock is configured as follow : * System Clock source = PLL (HSE) * SYSCLK(Hz) = 216000000 * HCLK(Hz) = 216000000 * AHB Prescaler = 1 * APB1 Prescaler = 4 * APB2 Prescaler = 2 * HSE Frequency(Hz) = 8000000 * LL_M = 8 * LL_N = 432 * LL_P = 2 * LL_Q = 9 * LL_R = 7 * VDD(V) = 3.3 * Main regulator output voltage = Scale1 mode * Flash Latency(WS) = 7 * @param None * @retval None 我这个例程是用的外部晶振，但是我并没有给开发板接任何外部晶振，看你的回答是可以旁路ST-Link模块的8M晶振，请教您，这个具体在cubeMX里怎么设置呢？
xueshawu1 发表于 2017-2-20 15:57 说出来，我自己都不信，我居然没有第一时间检修DISCO，而是去打样了个ST LINK ，还没焊接原件测试。测试成 ... 我买的元器件，最多只能搞出4个完整板出来
