LayerOne / LayerOne2017_emu

test

Dependencies:   SDFileSystem mbed-dev

Fork of Nucleo_Ex06_EMU by woodstock .

TFT/spidma.cpp@3:8d6e6aec9b01, 2017-05-27 (annotated)

Committer:
charliex
Date:
Sat May 27 02:15:43 2017 +0000
Revision:
3:8d6e6aec9b01
test

Who changed what in which revision?

UserRevisionLine numberNew contents of line
charliex 3:8d6e6aec9b01 1 /*===================================================================*/
charliex 3:8d6e6aec9b01 2 /* */
charliex 3:8d6e6aec9b01 3 /* spidma.cpp : SPI DMA function */
charliex 3:8d6e6aec9b01 4 /* */
charliex 3:8d6e6aec9b01 5 /* 2016/1/20 Racoon */
charliex 3:8d6e6aec9b01 6 /* */
charliex 3:8d6e6aec9b01 7 /*===================================================================*/
charliex 3:8d6e6aec9b01 8
charliex 3:8d6e6aec9b01 9 #include "mbed.h"
charliex 3:8d6e6aec9b01 10 #include "stm32f4xx_hal.h"
charliex 3:8d6e6aec9b01 11
charliex 3:8d6e6aec9b01 12 SPI_HandleTypeDef SpiHandle;
charliex 3:8d6e6aec9b01 13
charliex 3:8d6e6aec9b01 14 /*-------------------------------------------------------------------*/
charliex 3:8d6e6aec9b01 15 /* callback */
charliex 3:8d6e6aec9b01 16 /*-------------------------------------------------------------------*/
charliex 3:8d6e6aec9b01 17 extern "C" {
charliex 3:8d6e6aec9b01 18 void HAL_SPI_MspInit(SPI_HandleTypeDef *hspi)
charliex 3:8d6e6aec9b01 19 {
charliex 3:8d6e6aec9b01 20 static DMA_HandleTypeDef hdma_tx;
charliex 3:8d6e6aec9b01 21
charliex 3:8d6e6aec9b01 22 GPIO_InitTypeDef GPIO_InitStruct;
charliex 3:8d6e6aec9b01 23
charliex 3:8d6e6aec9b01 24 __HAL_RCC_GPIOA_CLK_ENABLE();
charliex 3:8d6e6aec9b01 25 __HAL_RCC_SPI1_CLK_ENABLE();
charliex 3:8d6e6aec9b01 26 __HAL_RCC_DMA2_CLK_ENABLE();
charliex 3:8d6e6aec9b01 27
charliex 3:8d6e6aec9b01 28 GPIO_InitStruct.Pin = GPIO_PIN_5;
charliex 3:8d6e6aec9b01 29 GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
charliex 3:8d6e6aec9b01 30 GPIO_InitStruct.Pull = GPIO_PULLUP;
charliex 3:8d6e6aec9b01 31 GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
charliex 3:8d6e6aec9b01 32 GPIO_InitStruct.Alternate = GPIO_AF5_SPI1;
charliex 3:8d6e6aec9b01 33 HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
charliex 3:8d6e6aec9b01 34
charliex 3:8d6e6aec9b01 35 GPIO_InitStruct.Pin = GPIO_PIN_6;
charliex 3:8d6e6aec9b01 36 HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
charliex 3:8d6e6aec9b01 37
charliex 3:8d6e6aec9b01 38 GPIO_InitStruct.Pin = GPIO_PIN_7;
charliex 3:8d6e6aec9b01 39 HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
charliex 3:8d6e6aec9b01 40
charliex 3:8d6e6aec9b01 41 hdma_tx.Instance = DMA2_Stream3;
charliex 3:8d6e6aec9b01 42 hdma_tx.Init.Channel = DMA_CHANNEL_3;
charliex 3:8d6e6aec9b01 43 hdma_tx.Init.Direction = DMA_MEMORY_TO_PERIPH;
charliex 3:8d6e6aec9b01 44 hdma_tx.Init.PeriphInc = DMA_PINC_DISABLE;
charliex 3:8d6e6aec9b01 45 hdma_tx.Init.MemInc = DMA_MINC_ENABLE;
charliex 3:8d6e6aec9b01 46 hdma_tx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
charliex 3:8d6e6aec9b01 47 hdma_tx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
charliex 3:8d6e6aec9b01 48 hdma_tx.Init.Mode = DMA_NORMAL;
charliex 3:8d6e6aec9b01 49 hdma_tx.Init.Priority = DMA_PRIORITY_HIGH;
charliex 3:8d6e6aec9b01 50 hdma_tx.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
charliex 3:8d6e6aec9b01 51 hdma_tx.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_FULL;
charliex 3:8d6e6aec9b01 52 hdma_tx.Init.MemBurst = DMA_MBURST_SINGLE;
charliex 3:8d6e6aec9b01 53 hdma_tx.Init.PeriphBurst = DMA_PBURST_SINGLE;
charliex 3:8d6e6aec9b01 54
charliex 3:8d6e6aec9b01 55 HAL_DMA_Init(&hdma_tx);
charliex 3:8d6e6aec9b01 56
charliex 3:8d6e6aec9b01 57 __HAL_LINKDMA(hspi, hdmatx, hdma_tx);
charliex 3:8d6e6aec9b01 58
charliex 3:8d6e6aec9b01 59 HAL_NVIC_SetPriority(DMA2_Stream3_IRQn, 0, 1);
charliex 3:8d6e6aec9b01 60 HAL_NVIC_EnableIRQ(DMA2_Stream3_IRQn);
charliex 3:8d6e6aec9b01 61 }
charliex 3:8d6e6aec9b01 62
charliex 3:8d6e6aec9b01 63 void DMA2_Stream3_IRQHandler(void)
charliex 3:8d6e6aec9b01 64 {
charliex 3:8d6e6aec9b01 65 HAL_DMA_IRQHandler(SpiHandle.hdmatx);
charliex 3:8d6e6aec9b01 66 }
charliex 3:8d6e6aec9b01 67
charliex 3:8d6e6aec9b01 68 } // extern "C"
charliex 3:8d6e6aec9b01 69
charliex 3:8d6e6aec9b01 70 uint8_t spi_read(void)
charliex 3:8d6e6aec9b01 71 {
charliex 3:8d6e6aec9b01 72 uint8_t recvBuf;
charliex 3:8d6e6aec9b01 73
charliex 3:8d6e6aec9b01 74 //while (SpiHandle.State != HAL_SPI_STATE_READY);
charliex 3:8d6e6aec9b01 75
charliex 3:8d6e6aec9b01 76 HAL_SPI_Receive(&SpiHandle, &recvBuf, 1, 100);
charliex 3:8d6e6aec9b01 77
charliex 3:8d6e6aec9b01 78 // while(HAL_SPI_GetState(&SpiHandle) == HAL_SPI_STATE_BUSY);
charliex 3:8d6e6aec9b01 79 return recvBuf;
charliex 3:8d6e6aec9b01 80 }
charliex 3:8d6e6aec9b01 81
charliex 3:8d6e6aec9b01 82
charliex 3:8d6e6aec9b01 83 /*-------------------------------------------------------------------*/
charliex 3:8d6e6aec9b01 84 /* Write a byte data */
charliex 3:8d6e6aec9b01 85 /*-------------------------------------------------------------------*/
charliex 3:8d6e6aec9b01 86 void spi_write(uint8_t data)
charliex 3:8d6e6aec9b01 87 {
charliex 3:8d6e6aec9b01 88 while (SpiHandle.State != HAL_SPI_STATE_READY);
charliex 3:8d6e6aec9b01 89
charliex 3:8d6e6aec9b01 90 HAL_SPI_Transmit(&SpiHandle, &data, 1, 100);
charliex 3:8d6e6aec9b01 91 while(HAL_SPI_GetState(&SpiHandle) == HAL_SPI_STATE_BUSY);
charliex 3:8d6e6aec9b01 92 }
charliex 3:8d6e6aec9b01 93
charliex 3:8d6e6aec9b01 94 /*-------------------------------------------------------------------*/
charliex 3:8d6e6aec9b01 95 /* Write a word data */
charliex 3:8d6e6aec9b01 96 /*-------------------------------------------------------------------*/
charliex 3:8d6e6aec9b01 97 void spi_writew(uint16_t data)
charliex 3:8d6e6aec9b01 98 {
charliex 3:8d6e6aec9b01 99 while (SpiHandle.State != HAL_SPI_STATE_READY);
charliex 3:8d6e6aec9b01 100 HAL_SPI_Transmit(&SpiHandle, (uint8_t *)&data, 2, 100);
charliex 3:8d6e6aec9b01 101 while(HAL_SPI_GetState(&SpiHandle) == HAL_SPI_STATE_BUSY);
charliex 3:8d6e6aec9b01 102 }
charliex 3:8d6e6aec9b01 103
charliex 3:8d6e6aec9b01 104 /*-------------------------------------------------------------------*/
charliex 3:8d6e6aec9b01 105 /* Initialize SPI DMA */
charliex 3:8d6e6aec9b01 106 /*-------------------------------------------------------------------*/
charliex 3:8d6e6aec9b01 107 void spi_init()
charliex 3:8d6e6aec9b01 108 {
charliex 3:8d6e6aec9b01 109
charliex 3:8d6e6aec9b01 110 SPI pad_spi(PC_12, PC_11, PC_10); // MOSI(should pullup), MISO, SCK
charliex 3:8d6e6aec9b01 111
charliex 3:8d6e6aec9b01 112
charliex 3:8d6e6aec9b01 113 SpiHandle.Instance = SPI1;
charliex 3:8d6e6aec9b01 114 SpiHandle.Init.Mode = SPI_MODE_MASTER;
charliex 3:8d6e6aec9b01 115 SpiHandle.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_2;
charliex 3:8d6e6aec9b01 116 SpiHandle.Init.Direction = SPI_DIRECTION_2LINES;
charliex 3:8d6e6aec9b01 117 SpiHandle.Init.CLKPhase = SPI_PHASE_1EDGE;
charliex 3:8d6e6aec9b01 118 SpiHandle.Init.CLKPolarity = SPI_POLARITY_HIGH;
charliex 3:8d6e6aec9b01 119 SpiHandle.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
charliex 3:8d6e6aec9b01 120 SpiHandle.Init.CRCPolynomial = 7;
charliex 3:8d6e6aec9b01 121 SpiHandle.Init.DataSize = SPI_DATASIZE_8BIT;
charliex 3:8d6e6aec9b01 122 SpiHandle.Init.FirstBit = SPI_FIRSTBIT_MSB;
charliex 3:8d6e6aec9b01 123 SpiHandle.Init.NSS = SPI_NSS_SOFT;
charliex 3:8d6e6aec9b01 124 SpiHandle.Init.TIMode = SPI_TIMODE_DISABLE;
charliex 3:8d6e6aec9b01 125
charliex 3:8d6e6aec9b01 126
charliex 3:8d6e6aec9b01 127 if (HAL_SPI_Init(&SpiHandle) != HAL_OK)
charliex 3:8d6e6aec9b01 128 while(1);
charliex 3:8d6e6aec9b01 129
charliex 3:8d6e6aec9b01 130
charliex 3:8d6e6aec9b01 131 }
charliex 3:8d6e6aec9b01 132