超音波位置認識装置 / DMAC

DMAを使用してDAC CubeMXで生成したコードを流用

DMAC.cpp@0:0ea9475fc06f, 2018-06-26 (annotated)

Committer:
k0050288
Date:
Tue Jun 26 06:27:49 2018 +0000
Revision:
0:0ea9475fc06f
DAC?DMA??????

Who changed what in which revision?

UserRevisionLine numberNew contents of line
k0050288 0:0ea9475fc06f 1 #include "DMAC.h"
k0050288 0:0ea9475fc06f 2
k0050288 0:0ea9475fc06f 3 /* HAL objects */
k0050288 0:0ea9475fc06f 4 static DAC_HandleTypeDef hdac;
k0050288 0:0ea9475fc06f 5 static DMA_HandleTypeDef hdma_dac1;
k0050288 0:0ea9475fc06f 6 static TIM_HandleTypeDef htim6;
k0050288 0:0ea9475fc06f 7
k0050288 0:0ea9475fc06f 8 void DMAC::init()
k0050288 0:0ea9475fc06f 9 {
k0050288 0:0ea9475fc06f 10 MX_DMA_Init();
k0050288 0:0ea9475fc06f 11 MX_TIM6_Init();
k0050288 0:0ea9475fc06f 12 MX_DAC_Init();
k0050288 0:0ea9475fc06f 13
k0050288 0:0ea9475fc06f 14 // disable interrupt
k0050288 0:0ea9475fc06f 15 HAL_NVIC_DisableIRQ(DMA1_Stream5_IRQn);
k0050288 0:0ea9475fc06f 16
k0050288 0:0ea9475fc06f 17 // start DAC
k0050288 0:0ea9475fc06f 18 HAL_TIM_Base_Start(&htim6);
k0050288 0:0ea9475fc06f 19 HAL_DAC_Start(&hdac,DAC_CHANNEL_1);
k0050288 0:0ea9475fc06f 20 }
k0050288 0:0ea9475fc06f 21
k0050288 0:0ea9475fc06f 22 void DMAC::play(const uint16_t* data, uint32_t len)
k0050288 0:0ea9475fc06f 23 {
k0050288 0:0ea9475fc06f 24 // stop DMA
k0050288 0:0ea9475fc06f 25 HAL_DAC_Stop_DMA(&hdac, DAC_CHANNEL_1);
k0050288 0:0ea9475fc06f 26
k0050288 0:0ea9475fc06f 27 // start DMA
k0050288 0:0ea9475fc06f 28 HAL_DAC_Start_DMA(&hdac, DAC_CHANNEL_1, (uint32_t*)data, len/2, DAC_ALIGN_12B_R);
k0050288 0:0ea9475fc06f 29 }
k0050288 0:0ea9475fc06f 30
k0050288 0:0ea9475fc06f 31
k0050288 0:0ea9475fc06f 32
k0050288 0:0ea9475fc06f 33 /* HAL functions */
k0050288 0:0ea9475fc06f 34 void HAL_TIM_Base_MspInit(TIM_HandleTypeDef* htim_base)
k0050288 0:0ea9475fc06f 35 {
k0050288 0:0ea9475fc06f 36 if(htim_base->Instance==TIM6)
k0050288 0:0ea9475fc06f 37 {
k0050288 0:0ea9475fc06f 38 __HAL_RCC_TIM6_CLK_ENABLE();
k0050288 0:0ea9475fc06f 39 }
k0050288 0:0ea9475fc06f 40 }
k0050288 0:0ea9475fc06f 41
k0050288 0:0ea9475fc06f 42 void HAL_DAC_MspInit(DAC_HandleTypeDef* hdac)
k0050288 0:0ea9475fc06f 43 {
k0050288 0:0ea9475fc06f 44 GPIO_InitTypeDef GPIO_InitStruct;
k0050288 0:0ea9475fc06f 45 if(hdac->Instance==DAC)
k0050288 0:0ea9475fc06f 46 {
k0050288 0:0ea9475fc06f 47 /* Peripheral clock enable */
k0050288 0:0ea9475fc06f 48 __HAL_RCC_DAC_CLK_ENABLE();
k0050288 0:0ea9475fc06f 49
k0050288 0:0ea9475fc06f 50 /**DAC GPIO Configuration
k0050288 0:0ea9475fc06f 51 PA4 ------> DAC_OUT1
k0050288 0:0ea9475fc06f 52 */
k0050288 0:0ea9475fc06f 53 GPIO_InitStruct.Pin = GPIO_PIN_4;
k0050288 0:0ea9475fc06f 54 GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
k0050288 0:0ea9475fc06f 55 GPIO_InitStruct.Pull = GPIO_NOPULL;
k0050288 0:0ea9475fc06f 56 HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
k0050288 0:0ea9475fc06f 57
k0050288 0:0ea9475fc06f 58 /* DAC DMA Init */
k0050288 0:0ea9475fc06f 59 /* DAC1 Init */
k0050288 0:0ea9475fc06f 60 hdma_dac1.Instance = DMA1_Stream5;
k0050288 0:0ea9475fc06f 61 hdma_dac1.Init.Channel = DMA_CHANNEL_7;
k0050288 0:0ea9475fc06f 62 hdma_dac1.Init.Direction = DMA_MEMORY_TO_PERIPH;
k0050288 0:0ea9475fc06f 63 hdma_dac1.Init.PeriphInc = DMA_PINC_DISABLE;
k0050288 0:0ea9475fc06f 64 hdma_dac1.Init.MemInc = DMA_MINC_ENABLE;
k0050288 0:0ea9475fc06f 65 hdma_dac1.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD;
k0050288 0:0ea9475fc06f 66 hdma_dac1.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;
k0050288 0:0ea9475fc06f 67 hdma_dac1.Init.Mode = DMA_NORMAL;
k0050288 0:0ea9475fc06f 68 hdma_dac1.Init.Priority = DMA_PRIORITY_LOW;
k0050288 0:0ea9475fc06f 69 hdma_dac1.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
k0050288 0:0ea9475fc06f 70 HAL_DMA_Init(&hdma_dac1);
k0050288 0:0ea9475fc06f 71
k0050288 0:0ea9475fc06f 72 __HAL_LINKDMA(hdac,DMA_Handle1,hdma_dac1);
k0050288 0:0ea9475fc06f 73 }
k0050288 0:0ea9475fc06f 74 }
k0050288 0:0ea9475fc06f 75
k0050288 0:0ea9475fc06f 76 /* DAC init function */
k0050288 0:0ea9475fc06f 77 void DMAC::MX_DAC_Init()
k0050288 0:0ea9475fc06f 78 {
k0050288 0:0ea9475fc06f 79 DAC_ChannelConfTypeDef sConfig;
k0050288 0:0ea9475fc06f 80
k0050288 0:0ea9475fc06f 81 /* DAC Initialization */
k0050288 0:0ea9475fc06f 82 hdac.Instance = DAC;
k0050288 0:0ea9475fc06f 83 HAL_DAC_Init(&hdac);
k0050288 0:0ea9475fc06f 84
k0050288 0:0ea9475fc06f 85 /*DAC channel OUT1 config */
k0050288 0:0ea9475fc06f 86 sConfig.DAC_Trigger = DAC_TRIGGER_T6_TRGO;
k0050288 0:0ea9475fc06f 87 sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
k0050288 0:0ea9475fc06f 88 HAL_DAC_ConfigChannel(&hdac, &sConfig, DAC_CHANNEL_1);
k0050288 0:0ea9475fc06f 89 }
k0050288 0:0ea9475fc06f 90
k0050288 0:0ea9475fc06f 91 /* TIM6 init function */
k0050288 0:0ea9475fc06f 92 void DMAC::MX_TIM6_Init()
k0050288 0:0ea9475fc06f 93 {
k0050288 0:0ea9475fc06f 94
k0050288 0:0ea9475fc06f 95 TIM_MasterConfigTypeDef sMasterConfig;
k0050288 0:0ea9475fc06f 96
k0050288 0:0ea9475fc06f 97 htim6.Instance = TIM6;
k0050288 0:0ea9475fc06f 98 htim6.Init.Prescaler = 0;
k0050288 0:0ea9475fc06f 99 htim6.Init.CounterMode = TIM_COUNTERMODE_UP;
k0050288 0:0ea9475fc06f 100 htim6.Init.Period = 90 - 1;
k0050288 0:0ea9475fc06f 101 HAL_TIM_Base_Init(&htim6);
k0050288 0:0ea9475fc06f 102
k0050288 0:0ea9475fc06f 103 sMasterConfig.MasterOutputTrigger = TIM_TRGO_UPDATE;
k0050288 0:0ea9475fc06f 104 sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
k0050288 0:0ea9475fc06f 105 HAL_TIMEx_MasterConfigSynchronization(&htim6, &sMasterConfig);
k0050288 0:0ea9475fc06f 106 }
k0050288 0:0ea9475fc06f 107
k0050288 0:0ea9475fc06f 108 /* Enable DMA controller clock */
k0050288 0:0ea9475fc06f 109 void DMAC::MX_DMA_Init()
k0050288 0:0ea9475fc06f 110 {
k0050288 0:0ea9475fc06f 111 /* DMA controller clock enable */
k0050288 0:0ea9475fc06f 112 __HAL_RCC_DMA1_CLK_ENABLE();
k0050288 0:0ea9475fc06f 113
k0050288 0:0ea9475fc06f 114 /* DMA interrupt init */
k0050288 0:0ea9475fc06f 115 /* DMA1_Stream5_IRQn interrupt configuration */
k0050288 0:0ea9475fc06f 116 HAL_NVIC_SetPriority(DMA1_Stream5_IRQn, 0, 0);
k0050288 0:0ea9475fc06f 117 HAL_NVIC_EnableIRQ(DMA1_Stream5_IRQn);
k0050288 0:0ea9475fc06f 118
k0050288 0:0ea9475fc06f 119 }
k0050288 0:0ea9475fc06f 120