133 lines
4.7 KiB
C
133 lines
4.7 KiB
C
/*
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* This file is part of Cleanflight.
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*
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* Cleanflight is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Cleanflight is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Cleanflight. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdbool.h>
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#include <stdint.h>
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#include "platform.h"
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#include "common/color.h"
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#include "drivers/light_ws2811strip.h"
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#include "nvic.h"
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void ws2811LedStripHardwareInit(void)
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{
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TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
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TIM_OCInitTypeDef TIM_OCInitStructure;
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GPIO_InitTypeDef GPIO_InitStructure;
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DMA_InitTypeDef DMA_InitStructure;
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uint16_t prescalerValue;
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#ifdef CC3D
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
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GPIO_StructInit(&GPIO_InitStructure);
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_Init(GPIOB, &GPIO_InitStructure);
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#else
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
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/* GPIOA Configuration: TIM3 Channel 1 as alternate function push-pull */
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GPIO_StructInit(&GPIO_InitStructure);
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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#endif
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
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/* Compute the prescaler value */
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prescalerValue = (uint16_t) (SystemCoreClock / 24000000) - 1;
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/* Time base configuration */
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TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
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TIM_TimeBaseStructure.TIM_Period = 29; // 800kHz
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TIM_TimeBaseStructure.TIM_Prescaler = prescalerValue;
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TIM_TimeBaseStructure.TIM_ClockDivision = 0;
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TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
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TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
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/* PWM1 Mode configuration: Channel1 */
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TIM_OCStructInit(&TIM_OCInitStructure);
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TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
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TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
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TIM_OCInitStructure.TIM_Pulse = 0;
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TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
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TIM_OC1Init(TIM3, &TIM_OCInitStructure);
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TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable);
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TIM_CtrlPWMOutputs(TIM3, ENABLE);
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/* configure DMA */
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/* DMA clock enable */
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RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
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/* DMA1 Channel6 Config */
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DMA_DeInit(DMA1_Channel6);
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DMA_StructInit(&DMA_InitStructure);
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DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&TIM3->CCR1;
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DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)ledStripDMABuffer;
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DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
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DMA_InitStructure.DMA_BufferSize = WS2811_DMA_BUFFER_SIZE;
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DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
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DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
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DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
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DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
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DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
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DMA_InitStructure.DMA_Priority = DMA_Priority_High;
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DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
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DMA_Init(DMA1_Channel6, &DMA_InitStructure);
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/* TIM3 CC1 DMA Request enable */
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TIM_DMACmd(TIM3, TIM_DMA_CC1, ENABLE);
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DMA_ITConfig(DMA1_Channel6, DMA_IT_TC, ENABLE);
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NVIC_InitTypeDef NVIC_InitStructure;
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NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel6_IRQn;
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NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = NVIC_PRIORITY_BASE(NVIC_PRIO_WS2811_DMA);
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NVIC_InitStructure.NVIC_IRQChannelSubPriority = NVIC_PRIORITY_SUB(NVIC_PRIO_WS2811_DMA);
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NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
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NVIC_Init(&NVIC_InitStructure);
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setStripColor(&hsv_white);
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ws2811UpdateStrip();
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}
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void DMA1_Channel6_IRQHandler(void)
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{
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if (DMA_GetFlagStatus(DMA1_FLAG_TC6)) {
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ws2811LedDataTransferInProgress = 0;
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DMA_Cmd(DMA1_Channel6, DISABLE); // disable DMA channel 6
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DMA_ClearFlag(DMA1_FLAG_TC6); // clear DMA1 Channel 6 transfer complete flag
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}
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}
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void ws2811LedStripDMAEnable(void)
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{
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DMA_SetCurrDataCounter(DMA1_Channel6, WS2811_DMA_BUFFER_SIZE); // load number of bytes to be transferred
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TIM_SetCounter(TIM3, 0);
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TIM_Cmd(TIM3, ENABLE);
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DMA_Cmd(DMA1_Channel6, ENABLE);
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}
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