/* * 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. */ #include #include #include #include #include "dma.h" #define NSTREAM (16) static const uint8_t dma_irqn[NSTREAM] = { DMA1_Stream0_IRQn, DMA1_Stream1_IRQn, DMA1_Stream2_IRQn, DMA1_Stream3_IRQn, DMA1_Stream4_IRQn, DMA1_Stream5_IRQn, DMA1_Stream6_IRQn, DMA1_Stream7_IRQn, DMA2_Stream0_IRQn, DMA2_Stream1_IRQn, DMA2_Stream2_IRQn, DMA2_Stream3_IRQn, DMA2_Stream4_IRQn, DMA2_Stream5_IRQn, DMA2_Stream6_IRQn, DMA2_Stream7_IRQn, }; // Default parameters to dma_init() shared by spi and i2c; Channel and Direction // vary depending on the peripheral instance so they get passed separately const DMA_InitTypeDef dma_init_struct_spi_i2c = { .Channel = 0, .Direction = 0, .PeriphInc = DMA_PINC_DISABLE, .MemInc = DMA_MINC_ENABLE, .PeriphDataAlignment = DMA_PDATAALIGN_BYTE, .MemDataAlignment = DMA_MDATAALIGN_BYTE, .Mode = DMA_NORMAL, .Priority = DMA_PRIORITY_LOW, .FIFOMode = DMA_FIFOMODE_DISABLE, .FIFOThreshold = DMA_FIFO_THRESHOLD_FULL, .MemBurst = DMA_MBURST_INC4, .PeriphBurst = DMA_PBURST_INC4 }; static DMA_HandleTypeDef *dma_handle[NSTREAM] = {NULL}; static uint32_t dma_last_channel[NSTREAM]; void DMA1_Stream0_IRQHandler(void) { if (dma_handle[0] != NULL) { HAL_DMA_IRQHandler(dma_handle[0]); } } void DMA1_Stream1_IRQHandler(void) { if (dma_handle[1] != NULL) { HAL_DMA_IRQHandler(dma_handle[1]); } } void DMA1_Stream2_IRQHandler(void) { if (dma_handle[2] != NULL) { HAL_DMA_IRQHandler(dma_handle[2]); } } void DMA1_Stream3_IRQHandler(void) { if (dma_handle[3] != NULL) { HAL_DMA_IRQHandler(dma_handle[3]); } } void DMA1_Stream4_IRQHandler(void) { if (dma_handle[4] != NULL) { HAL_DMA_IRQHandler(dma_handle[4]); } } void DMA1_Stream5_IRQHandler(void) { if (dma_handle[5] != NULL) { HAL_DMA_IRQHandler(dma_handle[5]); } } void DMA1_Stream6_IRQHandler(void) { if (dma_handle[6] != NULL) { HAL_DMA_IRQHandler(dma_handle[6]); } } void DMA1_Stream7_IRQHandler(void) { if (dma_handle[7] != NULL) { HAL_DMA_IRQHandler(dma_handle[7]); } } void DMA2_Stream0_IRQHandler(void) { if (dma_handle[8] != NULL) { HAL_DMA_IRQHandler(dma_handle[8]); } } void DMA2_Stream1_IRQHandler(void) { if (dma_handle[9] != NULL) { HAL_DMA_IRQHandler(dma_handle[9]); } } void DMA2_Stream2_IRQHandler(void) { if (dma_handle[10] != NULL) { HAL_DMA_IRQHandler(dma_handle[10]); } } void DMA2_Stream3_IRQHandler(void) { if (dma_handle[11] != NULL) { HAL_DMA_IRQHandler(dma_handle[11]); } } void DMA2_Stream4_IRQHandler(void) { if (dma_handle[12] != NULL) { HAL_DMA_IRQHandler(dma_handle[12]); } } void DMA2_Stream5_IRQHandler(void) { if (dma_handle[13] != NULL) { HAL_DMA_IRQHandler(dma_handle[13]); } } void DMA2_Stream6_IRQHandler(void) { if (dma_handle[14] != NULL) { HAL_DMA_IRQHandler(dma_handle[14]); } } void DMA2_Stream7_IRQHandler(void) { if (dma_handle[15] != NULL) { HAL_DMA_IRQHandler(dma_handle[15]); } } static int get_dma_id(DMA_Stream_TypeDef *dma_stream) { if ((uint32_t)dma_stream < DMA2_BASE) { return ((uint32_t)dma_stream - DMA1_Stream0_BASE) / 0x18; } else { return (NSTREAM / 2) + ((uint32_t)dma_stream - DMA2_Stream0_BASE) / 0x18; } } 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) { int dma_id = get_dma_id(dma_stream); //printf("dma_init(%p, %p(%d), 0x%x, 0x%x, %p)\n", dma, dma_stream, dma_id, (uint)dma_channel, (uint)direction, data); // TODO possibly don't need to clear the entire structure memset(dma, 0, sizeof(*dma)); // set global pointer for IRQ handler dma_handle[dma_id] = dma; // initialise parameters dma->Instance = dma_stream; dma->Init = *dma_init; dma->Init.Direction = direction; dma->Init.Channel = dma_channel; // half of __HAL_LINKDMA(data, xxx, *dma) // caller must implement other half by doing: data->xxx = dma dma->Parent = data; // if this stream was previously configured for this channel then we // can skip most of the initialisation if (dma_last_channel[dma_id] == dma_channel) { goto same_channel; } dma_last_channel[dma_id] = dma_channel; // enable clock for needed DMA peripheral if (dma_id <= 7) { __DMA1_CLK_ENABLE(); } else { __DMA2_CLK_ENABLE(); } // reset and configure DMA peripheral HAL_DMA_DeInit(dma); HAL_DMA_Init(dma); HAL_NVIC_SetPriority(dma_irqn[dma_id], 6, 0); same_channel: HAL_NVIC_EnableIRQ(dma_irqn[dma_id]); } void dma_deinit(DMA_HandleTypeDef *dma) { int dma_id = get_dma_id(dma->Instance); HAL_NVIC_DisableIRQ(dma_irqn[dma_id]); dma_handle[dma_id] = NULL; } void dma_invalidate_channel(DMA_Stream_TypeDef *dma_stream, uint32_t dma_channel) { int dma_id = get_dma_id(dma_stream); if (dma_last_channel[dma_id] == dma_channel) { dma_last_channel[dma_id] = 0xffffffff; } }