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Код: Выделить всё

#include <stm32f4xx.h>
#include <stm32f4xx_dma.h>
#include <stm32f4xx_rcc.h>
#include <stm32f4xx_gpio.h>
#include <stm32f4xx_tim.h>
#include <misc.h>

GPIO_InitTypeDef port;
TIM_TimeBaseInitTypeDef timer_base;
TIM_OCInitTypeDef timer_T0H;
TIM_OCInitTypeDef timer_T1H;
NVIC_InitTypeDef NVIC_InitStructure;
DMA_InitTypeDef DMA_InitStructure;

uint16_t PWM_tim_freq = 24000000;
uint16_t Prescaler = 0;
uint16_t frequency = 1;
uint16_t WS2811_TIMING_T0H = 1;
uint16_t WS2811_TIMING_T1H = 90;
uint16_t AutoReload_Value = 0;
uint16_t T0H_Pulse_Length = 0;
uint16_t T1H_Pulse_Length = 0;

uint16_t aSRC_Buffer[6] = { 0x0FFF, 0x0000, 0x0555 };

void initAll(void) {
	SystemCoreClockUpdate();

	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD, ENABLE);
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);
	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA1, ENABLE);

	GPIO_StructInit(&port);
	port.GPIO_Pin = GPIO_Pin_12 | GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
	port.GPIO_Mode = GPIO_Mode_AF;
	port.GPIO_OType = GPIO_OType_PP;
	port.GPIO_Speed = GPIO_Speed_100MHz;
	port.GPIO_PuPd = GPIO_PuPd_UP;
	GPIO_Init(GPIOD, &port);

	GPIO_PinAFConfig(GPIOD, GPIO_PinSource12, GPIO_AF_TIM4);
	GPIO_PinAFConfig(GPIOD, GPIO_PinSource13, GPIO_AF_TIM4);
	//GPIO_PinAFConfig(GPIOD, GPIO_PinSource14, GPIO_AF_TIM4);
	//GPIO_PinAFConfig(GPIOD, GPIO_PinSource15, GPIO_AF_TIM4);

	Prescaler = ((SystemCoreClock / 2) / PWM_tim_freq) - 1;
	AutoReload_Value = (uint16_t)(PWM_tim_freq / frequency) - 1;

	T0H_Pulse_Length = (uint16_t)((AutoReload_Value * WS2811_TIMING_T0H) / 100);
	T1H_Pulse_Length = (uint16_t)((AutoReload_Value * WS2811_TIMING_T1H) / 100);

	/*aSRC_Buffer[0] = T0H_Pulse_Length;
	aSRC_Buffer[1] = T1H_Pulse_Length;
	aSRC_Buffer[2] = T0H_Pulse_Length;*/

	TIM_TimeBaseStructInit(&timer_base);
	timer_base.TIM_Prescaler = Prescaler;
	timer_base.TIM_Period = AutoReload_Value;
	timer_base.TIM_ClockDivision = 0;
	timer_base.TIM_CounterMode = TIM_CounterMode_Up;
	TIM_TimeBaseInit(TIM4, &timer_base);

	DMA_DeInit(DMA1_Stream0);
	DMA_InitStructure.DMA_Channel = DMA_Channel_2;
	DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&(TIM4->CCR1);
	DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)aSRC_Buffer;
	DMA_InitStructure.DMA_DIR = DMA_DIR_MemoryToPeripheral;
	DMA_InitStructure.DMA_BufferSize = 3;
	DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
	DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
	DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
	DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
	DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
	DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;
	DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Enable;
	DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_Full;
	DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
	DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
	DMA_Init(DMA1_Stream0, &DMA_InitStructure);

	TIM_OCStructInit(&timer_T0H);
	timer_T0H.TIM_Pulse = T0H_Pulse_Length;
	timer_T0H.TIM_OCMode = TIM_OCMode_PWM1;
	timer_T0H.TIM_OutputState = TIM_OutputState_Enable;

	TIM_OCStructInit(&timer_T1H);
	timer_T1H.TIM_Pulse = T1H_Pulse_Length;
	timer_T1H.TIM_OCMode = TIM_OCMode_PWM1;
	timer_T1H.TIM_OutputState = TIM_OutputState_Enable;

	TIM_OC1Init(TIM4, &timer_T0H);
	TIM_OC2Init(TIM4, &timer_T1H);

	TIM_DMAConfig(TIM4, TIM_DMABase_ARR, TIM_DMABurstLength_3Transfers);
	TIM_DMACmd(TIM4, TIM_DMA_Update, ENABLE);
	TIM_Cmd(TIM4, ENABLE);
	TIM_CtrlPWMOutputs(TIM4, ENABLE);
	DMA_Cmd(DMA1_Stream0, ENABLE);
}

int main() {
	__enable_irq();
	initAll();
	NVIC_EnableIRQ(TIM4_IRQn);
	while (1) {
		__NOP();
	}

}