It's nucleo f4 DMA trandfer for ov7670&ILI9341.
Dependencies: mbed ILI9341_SPI OV7670_SCCB
SPI_DMAInit.h@0:ce10b2e08479, 2016-04-04 (annotated)
- Committer:
- tmnt
- Date:
- Mon Apr 04 02:05:59 2016 +0000
- Revision:
- 0:ce10b2e08479
ov7670_dma for nculeof401re
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
tmnt | 0:ce10b2e08479 | 1 | #include "mbed.h" |
tmnt | 0:ce10b2e08479 | 2 | |
tmnt | 0:ce10b2e08479 | 3 | |
tmnt | 0:ce10b2e08479 | 4 | |
tmnt | 0:ce10b2e08479 | 5 | DMA_HandleTypeDef SPIDma; |
tmnt | 0:ce10b2e08479 | 6 | SPI_HandleTypeDef spi1; |
tmnt | 0:ce10b2e08479 | 7 | |
tmnt | 0:ce10b2e08479 | 8 | |
tmnt | 0:ce10b2e08479 | 9 | void spi_Init() { |
tmnt | 0:ce10b2e08479 | 10 | |
tmnt | 0:ce10b2e08479 | 11 | |
tmnt | 0:ce10b2e08479 | 12 | __DMA2_CLK_ENABLE(); |
tmnt | 0:ce10b2e08479 | 13 | SPIDma.Instance = DMA2_Stream3; |
tmnt | 0:ce10b2e08479 | 14 | SPIDma.Init.Channel = DMA_CHANNEL_3; |
tmnt | 0:ce10b2e08479 | 15 | SPIDma.Init.Direction = DMA_MEMORY_TO_PERIPH; |
tmnt | 0:ce10b2e08479 | 16 | SPIDma.Init.PeriphInc = DMA_PINC_DISABLE; |
tmnt | 0:ce10b2e08479 | 17 | SPIDma.Init.MemInc = DMA_MINC_ENABLE; |
tmnt | 0:ce10b2e08479 | 18 | SPIDma.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE; // 8 bit |
tmnt | 0:ce10b2e08479 | 19 | SPIDma.Init.MemDataAlignment = DMA_PDATAALIGN_BYTE; // 8 bit |
tmnt | 0:ce10b2e08479 | 20 | SPIDma.Init.Mode = DMA_CIRCULAR; |
tmnt | 0:ce10b2e08479 | 21 | SPIDma.Init.Priority = DMA_PRIORITY_HIGH; |
tmnt | 0:ce10b2e08479 | 22 | SPIDma.Init.FIFOMode = DMA_FIFOMODE_DISABLE; |
tmnt | 0:ce10b2e08479 | 23 | HAL_DMA_Init(&SPIDma); |
tmnt | 0:ce10b2e08479 | 24 | |
tmnt | 0:ce10b2e08479 | 25 | // SPI pin |
tmnt | 0:ce10b2e08479 | 26 | __GPIOA_CLK_ENABLE(); |
tmnt | 0:ce10b2e08479 | 27 | GPIO_InitTypeDef spipins; |
tmnt | 0:ce10b2e08479 | 28 | spipins.Pin = GPIO_PIN_5|GPIO_PIN_6|GPIO_PIN_7; |
tmnt | 0:ce10b2e08479 | 29 | spipins.Mode = GPIO_MODE_AF_PP; |
tmnt | 0:ce10b2e08479 | 30 | spipins.Pull = GPIO_PULLDOWN; |
tmnt | 0:ce10b2e08479 | 31 | spipins.Speed = GPIO_SPEED_HIGH; |
tmnt | 0:ce10b2e08479 | 32 | spipins.Alternate = GPIO_AF5_SPI1; |
tmnt | 0:ce10b2e08479 | 33 | HAL_GPIO_Init(GPIOA, &spipins); |
tmnt | 0:ce10b2e08479 | 34 | |
tmnt | 0:ce10b2e08479 | 35 | // SPI |
tmnt | 0:ce10b2e08479 | 36 | __SPI1_CLK_ENABLE(); |
tmnt | 0:ce10b2e08479 | 37 | spi1.Init.Mode = SPI_MODE_MASTER; |
tmnt | 0:ce10b2e08479 | 38 | spi1.Init.Direction = SPI_DIRECTION_2LINES; |
tmnt | 0:ce10b2e08479 | 39 | spi1.Init.DataSize = SPI_DATASIZE_8BIT; |
tmnt | 0:ce10b2e08479 | 40 | spi1.Init.CLKPolarity= SPI_POLARITY_LOW;//パリティビット無し |
tmnt | 0:ce10b2e08479 | 41 | spi1.Init.CLKPhase = SPI_PHASE_1EDGE; // transmit only mode 送信のみ |
tmnt | 0:ce10b2e08479 | 42 | spi1.Init.NSS = SPI_NSS_SOFT; |
tmnt | 0:ce10b2e08479 | 43 | spi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_2; |
tmnt | 0:ce10b2e08479 | 44 | spi1.Init.FirstBit = SPI_FIRSTBIT_MSB ; |
tmnt | 0:ce10b2e08479 | 45 | spi1.Init.CRCPolynomial = 7; |
tmnt | 0:ce10b2e08479 | 46 | |
tmnt | 0:ce10b2e08479 | 47 | spi1.Instance = SPI1; |
tmnt | 0:ce10b2e08479 | 48 | spi1.hdmatx = &SPIDma; |
tmnt | 0:ce10b2e08479 | 49 | HAL_SPI_Init(&spi1); |
tmnt | 0:ce10b2e08479 | 50 | |
tmnt | 0:ce10b2e08479 | 51 | |
tmnt | 0:ce10b2e08479 | 52 | } |