STM32F30x - Support WS2811 LEDs.
This commit is contained in:
Dominic Clifton
parent
5a010c6b21
commit
3c09b6a8c7
3
Makefile
3
Makefile
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@ -253,7 +253,8 @@ STM32F3DISCOVERY_COMMON_SRC = $(STM32F30x_COMMON_SRC) \
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drivers/accgyro_l3gd20.c \
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drivers/accgyro_l3gd20.c \
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drivers/accgyro_lsm303dlhc.c \
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drivers/light_ws2811strip.c
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drivers/light_ws2811strip.c \
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drivers/light_ws2811strip_stm32f30x.c
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STM32F3DISCOVERY_SRC = $(STM32F3DISCOVERY_COMMON_SRC) \
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drivers/accgyro_adxl345.c \
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@ -0,0 +1,127 @@
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/*
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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 "gpio.h"
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#include "drivers/light_ws2811strip.h"
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#define WS2811_GPIO GPIOB
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#define WS2811_PIN Pin_8 // TIM16_CH1
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#define WS2811_PERIPHERAL RCC_AHBPeriph_GPIOB
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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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RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
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GPIO_PinAFConfig(GPIOB, GPIO_PinSource8, GPIO_AF_1);
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/* GPIOA Configuration: TIM16 Channel 1 as alternate function push-pull */
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GPIO_InitStructure.GPIO_Pin = WS2811_PIN;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
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GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_Init(WS2811_GPIO, &GPIO_InitStructure);
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM16, 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_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(TIM16, &TIM_TimeBaseStructure);
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/* PWM1 Mode configuration: Channel1 */
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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(TIM16, &TIM_OCInitStructure);
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TIM_CtrlPWMOutputs(TIM16, 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 Channel Config */
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DMA_DeInit(DMA1_Channel3);
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DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&TIM16->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_Channel3, &DMA_InitStructure);
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/* TIM16 CC1 DMA Request enable */
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TIM_DMACmd(TIM16, TIM_DMA_CC1, ENABLE);
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DMA_ITConfig(DMA1_Channel3, DMA_IT_TC, ENABLE);
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NVIC_InitTypeDef NVIC_InitStructure;
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NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel3_IRQn;
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NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
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NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
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NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
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NVIC_Init(&NVIC_InitStructure);
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setStripColor(&white);
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ws2811UpdateStrip();
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}
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void DMA1_Channel3_IRQHandler(void)
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{
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if (DMA_GetFlagStatus(DMA1_FLAG_TC3)) {
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ws2811LedDataTransferInProgress = 0;
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DMA_Cmd(DMA1_Channel3, DISABLE); // disable DMA channel 6
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DMA_ClearFlag(DMA1_FLAG_TC3); // 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_Channel3, WS2811_DMA_BUFFER_SIZE); // load number of bytes to be transferred
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TIM_SetCounter(TIM16, 0);
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TIM_Cmd(TIM16, ENABLE);
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DMA_Cmd(DMA1_Channel3, ENABLE);
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}
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