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Copy pathdma.h
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121 lines (92 loc) · 4.63 KB
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/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2015 Damien P. George
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
// These are ordered by DMAx_Stream number, and within a stream by channel
// number. The duplicate streams are ok as long as they aren't used at the
// same time.
//
// Currently I2C and SPI are synchronous and they call dma_init/dma_deinit
// around each transfer.
// DMA1 streams
#define DMA_STREAM_I2C1_RX DMA1_Stream0
#define DMA_CHANNEL_I2C1_RX DMA_CHANNEL_1
#define DMA_STREAM_SPI3_RX DMA1_Stream2
#define DMA_CHANNEL_SPI3_RX DMA_CHANNEL_0
#define DMA_STREAM_I2C3_RX DMA1_Stream2
#define DMA_CHANNEL_I2C3_RX DMA_CHANNEL_3
#define DMA_STREAM_I2C2_RX DMA1_Stream2
#define DMA_CHANNEL_I2C2_RX DMA_CHANNEL_7
#define DMA_STREAM_SPI2_RX DMA1_Stream3
#define DMA_CHANNEL_SPI2_RX DMA_CHANNEL_0
#define DMA_STREAM_SPI2_TX DMA1_Stream4
#define DMA_CHANNEL_SPI2_TX DMA_CHANNEL_0
#define DMA_STREAM_I2C3_TX DMA1_Stream4
#define DMA_CHANNEL_I2C3_TX DMA_CHANNEL_3
#define DMA_STREAM_DAC1 DMA1_Stream5
#define DMA_CHANNEL_DAC1 DMA_CHANNEL_7
#define DMA_STREAM_DAC2 DMA1_Stream6
#define DMA_CHANNEL_DAC2 DMA_CHANNEL_7
#define DMA_STREAM_SPI3_TX DMA1_Stream7
#define DMA_CHANNEL_SPI3_TX DMA_CHANNEL_0
#define DMA_STREAM_I2C1_TX DMA1_Stream7
#define DMA_CHANNEL_I2C1_TX DMA_CHANNEL_1
#define DMA_STREAM_I2C2_TX DMA1_Stream7
#define DMA_CHANNEL_I2C2_TX DMA_CHANNEL_7
// DMA2 streams
#define DMA_STREAM_SPI1_RX DMA2_Stream2
#define DMA_CHANNEL_SPI1_RX DMA_CHANNEL_3
#define DMA_STREAM_SPI5_RX DMA2_Stream3
#define DMA_CHANNEL_SPI5_RX DMA_CHANNEL_2
#define DMA_STREAM_SDIO_RX DMA2_Stream3
#define DMA_CHANNEL_SDIO_RX DMA_CHANNEL_4
#define DMA_STREAM_SPI4_RX DMA2_Stream3
#define DMA_CHANNEL_SPI4_RX DMA_CHANNEL_5
#define DMA_STREAM_SPI5_TX DMA2_Stream4
#define DMA_CHANNEL_SPI5_TX DMA_CHANNEL_2
#define DMA_STREAM_SPI4_TX DMA2_Stream4
#define DMA_CHANNEL_SPI4_TX DMA_CHANNEL_5
#define DMA_STREAM_SPI6_TX DMA2_Stream5
#define DMA_CHANNEL_SPI6_TX DMA_CHANNEL_1
#define DMA_STREAM_SPI1_TX DMA2_Stream5
#define DMA_CHANNEL_SPI1_TX DMA_CHANNEL_3
#define DMA_STREAM_SPI6_RX DMA2_Stream6
#define DMA_CHANNEL_SPI6_RX DMA_CHANNEL_1
#define DMA_STREAM_SDIO_TX DMA2_Stream6
#define DMA_CHANNEL_SDIO_TX DMA_CHANNEL_4
typedef union {
uint16_t enabled; // Used to test if both counters are == 0
uint8_t counter[2];
} dma_idle_count_t;
extern volatile dma_idle_count_t dma_idle;
#define DMA_IDLE_ENABLED() (dma_idle.enabled != 0)
#define DMA_SYSTICK_MASK 0x0e
#define DMA_MSECS_PER_SYSTICK (DMA_SYSTICK_MASK + 1)
#define DMA_IDLE_TICK_MAX (8) // 128 msec
#define DMA_IDLE_TICK(tick) (((tick) & DMA_SYSTICK_MASK) == 0)
extern const DMA_InitTypeDef dma_init_struct_spi_i2c;
void dma_init(DMA_HandleTypeDef *dma, DMA_Stream_TypeDef *dma_stream, const DMA_InitTypeDef *dma_init, uint32_t dma_channel, uint32_t direction, void *data);
void dma_deinit(DMA_HandleTypeDef *dma);
void dma_invalidate_channel(DMA_Stream_TypeDef *dma_stream, uint32_t dma_channel);
void dma_idle_handler(int controller);