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circuitpython/ports/stm32/dma.c
Damien George 23d9c6a0fd stm32: Add initial support for STM32L0xx MCUs.
2019-07-05 17:24:59 +10:00

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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2015-2019 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 <stdio.h>
#include <string.h>
#include <stdint.h>
#include "py/obj.h"
#include "py/mphal.h"
#include "systick.h"
#include "dma.h"
#include "irq.h"
#define DMA_IDLE_ENABLED() (dma_idle.enabled != 0)
#define DMA_SYSTICK_LOG2 (3)
#define DMA_SYSTICK_MASK ((1 << DMA_SYSTICK_LOG2) - 1)
#define DMA_IDLE_TICK_MAX (8) // 8*8 = 64 msec
#define DMA_IDLE_TICK(tick) (((tick) & ~(SYSTICK_DISPATCH_NUM_SLOTS - 1) & DMA_SYSTICK_MASK) == 0)
#define ENABLE_SDIO (MICROPY_HW_ENABLE_SDCARD || MICROPY_HW_ENABLE_MMCARD)
typedef enum {
dma_id_not_defined=-1,
dma_id_0,
dma_id_1,
dma_id_2,
dma_id_3,
dma_id_4,
dma_id_5,
dma_id_6,
dma_id_7,
dma_id_8,
dma_id_9,
dma_id_10,
dma_id_11,
dma_id_12,
dma_id_13,
dma_id_14,
dma_id_15,
} dma_id_t;
typedef union {
uint16_t enabled; // Used to test if both counters are == 0
uint8_t counter[2];
} dma_idle_count_t;
struct _dma_descr_t {
#if defined(STM32F4) || defined(STM32F7) || defined(STM32H7)
DMA_Stream_TypeDef *instance;
#elif defined(STM32F0) || defined(STM32L0) || defined(STM32L4)
DMA_Channel_TypeDef *instance;
#else
#error "Unsupported Processor"
#endif
uint32_t sub_instance;
dma_id_t id;
const DMA_InitTypeDef *init;
};
// Default parameters to dma_init() shared by spi and i2c; Channel and Direction
// vary depending on the peripheral instance so they get passed separately
static const DMA_InitTypeDef dma_init_struct_spi_i2c = {
#if defined(STM32F4) || defined(STM32F7)
.Channel = 0,
#elif defined(STM32H7) || defined(STM32L4)
.Request = 0,
#endif
.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,
#if defined(STM32F4) || defined(STM32F7) || defined(STM32H7)
.FIFOMode = DMA_FIFOMODE_DISABLE,
.FIFOThreshold = DMA_FIFO_THRESHOLD_FULL,
.MemBurst = DMA_MBURST_INC4,
.PeriphBurst = DMA_PBURST_INC4
#endif
};
#if ENABLE_SDIO && !defined(STM32H7)
// Parameters to dma_init() for SDIO tx and rx.
static const DMA_InitTypeDef dma_init_struct_sdio = {
#if defined(STM32F4) || defined(STM32F7)
.Channel = 0,
#elif defined(STM32L4)
.Request = 0,
#endif
.Direction = 0,
.PeriphInc = DMA_PINC_DISABLE,
.MemInc = DMA_MINC_ENABLE,
.PeriphDataAlignment = DMA_PDATAALIGN_WORD,
.MemDataAlignment = DMA_MDATAALIGN_WORD,
#if defined(STM32F4) || defined(STM32F7)
.Mode = DMA_PFCTRL,
#elif defined(STM32L4)
.Mode = DMA_NORMAL,
#endif
.Priority = DMA_PRIORITY_VERY_HIGH,
#if defined(STM32F4) || defined(STM32F7)
.FIFOMode = DMA_FIFOMODE_ENABLE,
.FIFOThreshold = DMA_FIFO_THRESHOLD_FULL,
.MemBurst = DMA_MBURST_INC4,
.PeriphBurst = DMA_PBURST_INC4,
#endif
};
#endif
#if defined(MICROPY_HW_ENABLE_DAC) && MICROPY_HW_ENABLE_DAC
// Default parameters to dma_init() for DAC tx
static const DMA_InitTypeDef dma_init_struct_dac = {
#if defined(STM32F4) || defined(STM32F7)
.Channel = 0,
#elif defined(STM32H7) || defined(STM32L4)
.Request = 0,
#endif
.Direction = 0,
.PeriphInc = DMA_PINC_DISABLE,
.MemInc = DMA_MINC_ENABLE,
.PeriphDataAlignment = DMA_PDATAALIGN_BYTE,
.MemDataAlignment = DMA_MDATAALIGN_BYTE,
.Mode = DMA_NORMAL,
.Priority = DMA_PRIORITY_HIGH,
#if defined(STM32F4) || defined(STM32F7) || defined(STM32H7)
.FIFOMode = DMA_FIFOMODE_DISABLE,
.FIFOThreshold = DMA_FIFO_THRESHOLD_HALFFULL,
.MemBurst = DMA_MBURST_SINGLE,
.PeriphBurst = DMA_PBURST_SINGLE,
#endif
};
#endif
#if MICROPY_HW_ENABLE_DCMI
static const DMA_InitTypeDef dma_init_struct_dcmi = {
#if defined(STM32H7)
.Request = DMA_REQUEST_DCMI,
#else
.Channel = DMA_CHANNEL_1,
#endif
.Direction = DMA_PERIPH_TO_MEMORY,
.PeriphInc = DMA_PINC_DISABLE,
.MemInc = DMA_MINC_ENABLE,
.PeriphDataAlignment = DMA_PDATAALIGN_WORD,
.MemDataAlignment = DMA_MDATAALIGN_WORD,
.Mode = DMA_NORMAL,
.Priority = DMA_PRIORITY_HIGH,
.FIFOMode = DMA_FIFOMODE_ENABLE,
.FIFOThreshold = DMA_FIFO_THRESHOLD_FULL,
.MemBurst = DMA_MBURST_INC4,
.PeriphBurst = DMA_PBURST_SINGLE
};
#endif
#if defined(STM32F0)
#define NCONTROLLERS (2)
#define NSTREAMS_PER_CONTROLLER (7)
#define NSTREAM (NCONTROLLERS * NSTREAMS_PER_CONTROLLER)
#define DMA_SUB_INSTANCE_AS_UINT8(dma_channel) ((dma_channel) >> ((dma_channel >> 28) * 4))
#define DMA1_ENABLE_MASK (0x007f) // Bits in dma_enable_mask corresponding to DMA1 (7 channels)
#define DMA2_ENABLE_MASK (0x0f80) // Bits in dma_enable_mask corresponding to DMA2 (only 5 channels)
// DMA1 streams
#if MICROPY_HW_ENABLE_DAC
const dma_descr_t dma_DAC_1_TX = { DMA1_Channel3, HAL_DMA1_CH3_DAC_CH1, dma_id_2, &dma_init_struct_dac };
const dma_descr_t dma_DAC_2_TX = { DMA1_Channel4, HAL_DMA1_CH4_DAC_CH2, dma_id_3, &dma_init_struct_dac };
#endif
const dma_descr_t dma_SPI_2_TX = { DMA1_Channel5, HAL_DMA1_CH5_SPI2_TX, dma_id_4, &dma_init_struct_spi_i2c};
const dma_descr_t dma_SPI_2_RX = { DMA1_Channel6, HAL_DMA1_CH6_SPI2_RX, dma_id_5, &dma_init_struct_spi_i2c};
const dma_descr_t dma_SPI_1_RX = { DMA2_Channel3, HAL_DMA2_CH3_SPI1_RX, dma_id_9, &dma_init_struct_spi_i2c};
const dma_descr_t dma_SPI_1_TX = { DMA2_Channel4, HAL_DMA2_CH4_SPI1_TX, dma_id_10, &dma_init_struct_spi_i2c};
static const uint8_t dma_irqn[NSTREAM] = {
DMA1_Ch1_IRQn,
DMA1_Ch2_3_DMA2_Ch1_2_IRQn,
DMA1_Ch2_3_DMA2_Ch1_2_IRQn,
DMA1_Ch4_7_DMA2_Ch3_5_IRQn,
DMA1_Ch4_7_DMA2_Ch3_5_IRQn,
DMA1_Ch4_7_DMA2_Ch3_5_IRQn,
DMA1_Ch4_7_DMA2_Ch3_5_IRQn,
DMA1_Ch2_3_DMA2_Ch1_2_IRQn,
DMA1_Ch2_3_DMA2_Ch1_2_IRQn,
DMA1_Ch4_7_DMA2_Ch3_5_IRQn,
DMA1_Ch4_7_DMA2_Ch3_5_IRQn,
DMA1_Ch4_7_DMA2_Ch3_5_IRQn,
0,
0,
};
#elif defined(STM32F4) || defined(STM32F7)
#define NCONTROLLERS (2)
#define NSTREAMS_PER_CONTROLLER (8)
#define NSTREAM (NCONTROLLERS * NSTREAMS_PER_CONTROLLER)
#define DMA_SUB_INSTANCE_AS_UINT8(dma_channel) (((dma_channel) & DMA_SxCR_CHSEL) >> 25)
#define DMA1_ENABLE_MASK (0x00ff) // Bits in dma_enable_mask corresponding to DMA1
#define DMA2_ENABLE_MASK (0xff00) // Bits in dma_enable_mask corresponding to DMA2
// These descriptors 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
const dma_descr_t dma_I2C_1_RX = { DMA1_Stream0, DMA_CHANNEL_1, dma_id_0, &dma_init_struct_spi_i2c };
const dma_descr_t dma_SPI_3_RX = { DMA1_Stream2, DMA_CHANNEL_0, dma_id_2, &dma_init_struct_spi_i2c };
#if defined(STM32F7)
const dma_descr_t dma_I2C_4_RX = { DMA1_Stream2, DMA_CHANNEL_2, dma_id_2, &dma_init_struct_spi_i2c };
#endif
const dma_descr_t dma_I2C_3_RX = { DMA1_Stream2, DMA_CHANNEL_3, dma_id_2, &dma_init_struct_spi_i2c };
const dma_descr_t dma_I2C_2_RX = { DMA1_Stream2, DMA_CHANNEL_7, dma_id_2, &dma_init_struct_spi_i2c };
const dma_descr_t dma_SPI_2_RX = { DMA1_Stream3, DMA_CHANNEL_0, dma_id_3, &dma_init_struct_spi_i2c };
const dma_descr_t dma_SPI_2_TX = { DMA1_Stream4, DMA_CHANNEL_0, dma_id_4, &dma_init_struct_spi_i2c };
const dma_descr_t dma_I2C_3_TX = { DMA1_Stream4, DMA_CHANNEL_3, dma_id_4, &dma_init_struct_spi_i2c };
#if defined(STM32F7)
const dma_descr_t dma_I2C_4_TX = { DMA1_Stream5, DMA_CHANNEL_2, dma_id_5, &dma_init_struct_spi_i2c };
#endif
#if defined(MICROPY_HW_ENABLE_DAC) && MICROPY_HW_ENABLE_DAC
const dma_descr_t dma_DAC_1_TX = { DMA1_Stream5, DMA_CHANNEL_7, dma_id_5, &dma_init_struct_dac };
const dma_descr_t dma_DAC_2_TX = { DMA1_Stream6, DMA_CHANNEL_7, dma_id_6, &dma_init_struct_dac };
#endif
const dma_descr_t dma_SPI_3_TX = { DMA1_Stream7, DMA_CHANNEL_0, dma_id_7, &dma_init_struct_spi_i2c };
const dma_descr_t dma_I2C_1_TX = { DMA1_Stream7, DMA_CHANNEL_1, dma_id_7, &dma_init_struct_spi_i2c };
const dma_descr_t dma_I2C_2_TX = { DMA1_Stream7, DMA_CHANNEL_7, dma_id_7, &dma_init_struct_spi_i2c };
/* not preferred streams
const dma_descr_t dma_SPI_3_RX = { DMA1_Stream0, DMA_CHANNEL_0, dma_id_0, &dma_init_struct_spi_i2c };
const dma_descr_t dma_I2C_1_TX = { DMA1_Stream6, DMA_CHANNEL_1, dma_id_6, &dma_init_struct_spi_i2c };
*/
// DMA2 streams
#if defined(STM32F7) && defined(SDMMC2) && ENABLE_SDIO
const dma_descr_t dma_SDMMC_2 = { DMA2_Stream0, DMA_CHANNEL_11, dma_id_8, &dma_init_struct_sdio };
#endif
#if MICROPY_HW_ENABLE_DCMI
const dma_descr_t dma_DCMI_0 = { DMA2_Stream1, DMA_CHANNEL_1, dma_id_9, &dma_init_struct_dcmi };
#endif
const dma_descr_t dma_SPI_1_RX = { DMA2_Stream2, DMA_CHANNEL_3, dma_id_10, &dma_init_struct_spi_i2c };
const dma_descr_t dma_SPI_5_RX = { DMA2_Stream3, DMA_CHANNEL_2, dma_id_11, &dma_init_struct_spi_i2c };
#if ENABLE_SDIO
const dma_descr_t dma_SDIO_0 = { DMA2_Stream3, DMA_CHANNEL_4, dma_id_11, &dma_init_struct_sdio };
#endif
const dma_descr_t dma_SPI_4_RX = { DMA2_Stream3, DMA_CHANNEL_5, dma_id_11, &dma_init_struct_spi_i2c };
const dma_descr_t dma_SPI_5_TX = { DMA2_Stream4, DMA_CHANNEL_2, dma_id_12, &dma_init_struct_spi_i2c };
const dma_descr_t dma_SPI_4_TX = { DMA2_Stream4, DMA_CHANNEL_5, dma_id_12, &dma_init_struct_spi_i2c };
const dma_descr_t dma_SPI_6_TX = { DMA2_Stream5, DMA_CHANNEL_1, dma_id_13, &dma_init_struct_spi_i2c };
const dma_descr_t dma_SPI_1_TX = { DMA2_Stream5, DMA_CHANNEL_3, dma_id_13, &dma_init_struct_spi_i2c };
//#if defined(STM32F7) && defined(SDMMC2) && ENABLE_SDIO
//const dma_descr_t dma_SDMMC_2 = { DMA2_Stream5, DMA_CHANNEL_11, dma_id_13, &dma_init_struct_sdio };
//#endif
const dma_descr_t dma_SPI_6_RX = { DMA2_Stream6, DMA_CHANNEL_1, dma_id_14, &dma_init_struct_spi_i2c };
//#if ENABLE_SDIO
//const dma_descr_t dma_SDIO_0 = { DMA2_Stream6, DMA_CHANNEL_4, dma_id_14, &dma_init_struct_sdio };
//#endif
/* not preferred streams
const dma_descr_t dma_SPI_1_TX = { DMA2_Stream3, DMA_CHANNEL_3, dma_id_11, &dma_init_struct_spi_i2c };
const dma_descr_t dma_SPI_1_RX = { DMA2_Stream0, DMA_CHANNEL_3, dma_id_8, &dma_init_struct_spi_i2c };
const dma_descr_t dma_SPI_4_RX = { DMA2_Stream0, DMA_CHANNEL_4, dma_id_8, &dma_init_struct_spi_i2c };
const dma_descr_t dma_SPI_4_TX = { DMA2_Stream1, DMA_CHANNEL_4, dma_id_9, &dma_init_struct_spi_i2c };
const dma_descr_t dma_SPI_5_RX = { DMA2_Stream5, DMA_CHANNEL_7, dma_id_13, &dma_init_struct_spi_i2c };
const dma_descr_t dma_SPI_5_TX = { DMA2_Stream6, DMA_CHANNEL_7, dma_id_14, &dma_init_struct_spi_i2c };
*/
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,
};
#elif defined(STM32L0)
#define NCONTROLLERS (1)
#define NSTREAMS_PER_CONTROLLER (7)
#define NSTREAM (NCONTROLLERS * NSTREAMS_PER_CONTROLLER)
#define DMA_SUB_INSTANCE_AS_UINT8(dma_request) (dma_request)
#define DMA1_ENABLE_MASK (0x007f) // Bits in dma_enable_mask corresponding to DMA1
// These descriptors are ordered by DMAx_Channel number, and within a channel by request
// number. The duplicate streams are ok as long as they aren't used at the same time.
// DMA1 streams
const dma_descr_t dma_SPI_1_RX = { DMA1_Channel2, DMA_REQUEST_1, dma_id_1, &dma_init_struct_spi_i2c };
const dma_descr_t dma_I2C_3_TX = { DMA1_Channel2, DMA_REQUEST_3, dma_id_1, &dma_init_struct_spi_i2c };
const dma_descr_t dma_SPI_1_TX = { DMA1_Channel3, DMA_REQUEST_1, dma_id_2, &dma_init_struct_spi_i2c };
const dma_descr_t dma_I2C_3_RX = { DMA1_Channel3, DMA_REQUEST_3, dma_id_2, &dma_init_struct_spi_i2c };
#if MICROPY_HW_ENABLE_DAC
const dma_descr_t dma_DAC_1_TX = { DMA1_Channel3, DMA_REQUEST_6, dma_id_2, &dma_init_struct_dac };
#endif
const dma_descr_t dma_SPI_2_RX = { DMA1_Channel4, DMA_REQUEST_1, dma_id_3, &dma_init_struct_spi_i2c };
const dma_descr_t dma_I2C_2_TX = { DMA1_Channel4, DMA_REQUEST_3, dma_id_3, &dma_init_struct_spi_i2c };
#if MICROPY_HW_ENABLE_DAC
const dma_descr_t dma_DAC_2_TX = { DMA1_Channel4, DMA_REQUEST_5, dma_id_3, &dma_init_struct_dac };
#endif
const dma_descr_t dma_SPI_2_TX = { DMA1_Channel5, DMA_REQUEST_1, dma_id_4, &dma_init_struct_spi_i2c };
const dma_descr_t dma_I2C_2_RX = { DMA1_Channel5, DMA_REQUEST_3, dma_id_4, &dma_init_struct_spi_i2c };
const dma_descr_t dma_I2C_1_TX = { DMA1_Channel6, DMA_REQUEST_3, dma_id_5, &dma_init_struct_spi_i2c };
const dma_descr_t dma_I2C_1_RX = { DMA1_Channel7, DMA_REQUEST_3, dma_id_6, &dma_init_struct_spi_i2c };
static const uint8_t dma_irqn[NSTREAM] = {
DMA1_Channel1_IRQn,
DMA1_Channel2_3_IRQn,
DMA1_Channel4_5_6_7_IRQn,
0,
0,
0,
0,
};
#elif defined(STM32L4)
#define NCONTROLLERS (2)
#define NSTREAMS_PER_CONTROLLER (7)
#define NSTREAM (NCONTROLLERS * NSTREAMS_PER_CONTROLLER)
#define DMA_SUB_INSTANCE_AS_UINT8(dma_request) (dma_request)
#define DMA1_ENABLE_MASK (0x007f) // Bits in dma_enable_mask corresponding to DMA1
#define DMA2_ENABLE_MASK (0x3f80) // Bits in dma_enable_mask corresponding to DMA2
// These descriptors are ordered by DMAx_Channel number, and within a channel by request
// number. The duplicate streams are ok as long as they aren't used at the same time.
// DMA1 streams
//const dma_descr_t dma_ADC_1_RX = { DMA1_Channel1, DMA_REQUEST_0, dma_id_0, NULL }; // unused
//const dma_descr_t dma_ADC_2_RX = { DMA1_Channel2, DMA_REQUEST_0, dma_id_1, NULL }; // unused
const dma_descr_t dma_SPI_1_RX = { DMA1_Channel2, DMA_REQUEST_1, dma_id_1, &dma_init_struct_spi_i2c };
const dma_descr_t dma_I2C_3_TX = { DMA1_Channel2, DMA_REQUEST_3, dma_id_1, &dma_init_struct_spi_i2c };
//const dma_descr_t dma_ADC_3_RX = { DMA1_Channel3, DMA_REQUEST_0, dma_id_2, NULL }; // unused
const dma_descr_t dma_SPI_1_TX = { DMA1_Channel3, DMA_REQUEST_1, dma_id_2, &dma_init_struct_spi_i2c };
const dma_descr_t dma_I2C_3_RX = { DMA1_Channel3, DMA_REQUEST_3, dma_id_2, &dma_init_struct_spi_i2c };
#if MICROPY_HW_ENABLE_DAC
const dma_descr_t dma_DAC_1_TX = { DMA1_Channel3, DMA_REQUEST_6, dma_id_2, &dma_init_struct_dac };
#endif
const dma_descr_t dma_SPI_2_RX = { DMA1_Channel4, DMA_REQUEST_1, dma_id_3, &dma_init_struct_spi_i2c };
const dma_descr_t dma_I2C_2_TX = { DMA1_Channel4, DMA_REQUEST_3, dma_id_3, &dma_init_struct_spi_i2c };
#if MICROPY_HW_ENABLE_DAC
const dma_descr_t dma_DAC_2_TX = { DMA1_Channel4, DMA_REQUEST_5, dma_id_3, &dma_init_struct_dac };
#endif
const dma_descr_t dma_SPI_2_TX = { DMA1_Channel5, DMA_REQUEST_1, dma_id_4, &dma_init_struct_spi_i2c };
const dma_descr_t dma_I2C_2_RX = { DMA1_Channel5, DMA_REQUEST_3, dma_id_4, &dma_init_struct_spi_i2c };
const dma_descr_t dma_I2C_1_TX = { DMA1_Channel6, DMA_REQUEST_3, dma_id_5, &dma_init_struct_spi_i2c };
const dma_descr_t dma_I2C_1_RX = { DMA1_Channel7, DMA_REQUEST_3, dma_id_6, &dma_init_struct_spi_i2c };
// DMA2 streams
const dma_descr_t dma_SPI_3_RX = { DMA2_Channel1, DMA_REQUEST_3, dma_id_7, &dma_init_struct_spi_i2c };
const dma_descr_t dma_SPI_3_TX = { DMA2_Channel2, DMA_REQUEST_3, dma_id_8, &dma_init_struct_spi_i2c };
/* not preferred streams
const dma_descr_t dma_ADC_1_RX = { DMA2_Channel3, DMA_REQUEST_0, dma_id_9, NULL };
const dma_descr_t dma_SPI_1_RX = { DMA2_Channel3, DMA_REQUEST_4, dma_id_9, &dma_init_struct_spi_i2c };
const dma_descr_t dma_ADC_2_RX = { DMA2_Channel4, DMA_REQUEST_0, dma_id_10, NULL };
const dma_descr_t dma_DAC_1_TX = { DMA2_Channel4, DMA_REQUEST_3, dma_id_10, &dma_init_struct_dac };
const dma_descr_t dma_SPI_1_TX = { DMA2_Channel4, DMA_REQUEST_4, dma_id_10, &dma_init_struct_spi_i2c };
*/
#if ENABLE_SDIO
const dma_descr_t dma_SDIO_0 = { DMA2_Channel4, DMA_REQUEST_7, dma_id_10, &dma_init_struct_sdio };
#endif
/* not preferred streams
const dma_descr_t dma_ADC_3_RX = { DMA2_Channel5, DMA_REQUEST_0, dma_id_11, NULL };
const dma_descr_t dma_DAC_2_TX = { DMA2_Channel5, DMA_REQUEST_3, dma_id_11, &dma_init_struct_dac };
const dma_descr_t dma_SDIO_0_TX= { DMA2_Channel5, DMA_REQUEST_7, dma_id_11, &dma_init_struct_sdio };
const dma_descr_t dma_I2C_1_RX = { DMA2_Channel6, DMA_REQUEST_5, dma_id_12, &dma_init_struct_spi_i2c };
const dma_descr_t dma_I2C_1_TX = { DMA2_Channel7, DMA_REQUEST_5, dma_id_13, &dma_init_struct_spi_i2c };
*/
static const uint8_t dma_irqn[NSTREAM] = {
DMA1_Channel1_IRQn,
DMA1_Channel2_IRQn,
DMA1_Channel3_IRQn,
DMA1_Channel4_IRQn,
DMA1_Channel5_IRQn,
DMA1_Channel6_IRQn,
DMA1_Channel7_IRQn,
DMA2_Channel1_IRQn,
DMA2_Channel2_IRQn,
DMA2_Channel3_IRQn,
DMA2_Channel4_IRQn,
DMA2_Channel5_IRQn,
DMA2_Channel6_IRQn,
DMA2_Channel7_IRQn,
};
#elif defined(STM32H7)
#define NCONTROLLERS (2)
#define NSTREAMS_PER_CONTROLLER (8)
#define NSTREAM (NCONTROLLERS * NSTREAMS_PER_CONTROLLER)
#define DMA_SUB_INSTANCE_AS_UINT8(dma_channel) (dma_channel)
#define DMA1_ENABLE_MASK (0x00ff) // Bits in dma_enable_mask corresponding to DMA1
#define DMA2_ENABLE_MASK (0xff00) // Bits in dma_enable_mask corresponding to DMA2
// These descriptors 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
const dma_descr_t dma_I2C_1_RX = { DMA1_Stream0, DMA_REQUEST_I2C1_RX, dma_id_0, &dma_init_struct_spi_i2c };
const dma_descr_t dma_SPI_3_RX = { DMA1_Stream2, DMA_REQUEST_SPI3_RX, dma_id_2, &dma_init_struct_spi_i2c };
const dma_descr_t dma_I2C_4_RX = { DMA1_Stream2, BDMA_REQUEST_I2C4_RX, dma_id_2, &dma_init_struct_spi_i2c };
const dma_descr_t dma_I2C_3_RX = { DMA1_Stream2, DMA_REQUEST_I2C3_RX, dma_id_2, &dma_init_struct_spi_i2c };
const dma_descr_t dma_I2C_2_RX = { DMA1_Stream2, DMA_REQUEST_I2C2_RX, dma_id_2, &dma_init_struct_spi_i2c };
const dma_descr_t dma_SPI_2_RX = { DMA1_Stream3, DMA_REQUEST_SPI2_RX, dma_id_3, &dma_init_struct_spi_i2c };
const dma_descr_t dma_SPI_2_TX = { DMA1_Stream4, DMA_REQUEST_SPI2_TX, dma_id_4, &dma_init_struct_spi_i2c };
const dma_descr_t dma_I2C_3_TX = { DMA1_Stream4, DMA_REQUEST_I2C3_TX, dma_id_4, &dma_init_struct_spi_i2c };
const dma_descr_t dma_I2C_4_TX = { DMA1_Stream5, BDMA_REQUEST_I2C4_TX, dma_id_5, &dma_init_struct_spi_i2c };
#if defined(MICROPY_HW_ENABLE_DAC) && MICROPY_HW_ENABLE_DAC
const dma_descr_t dma_DAC_1_TX = { DMA1_Stream5, DMA_REQUEST_DAC1_CH1, dma_id_5, &dma_init_struct_dac };
const dma_descr_t dma_DAC_2_TX = { DMA1_Stream6, DMA_REQUEST_DAC1_CH2, dma_id_6, &dma_init_struct_dac };
#endif
const dma_descr_t dma_SPI_3_TX = { DMA1_Stream7, DMA_REQUEST_SPI3_TX, dma_id_7, &dma_init_struct_spi_i2c };
const dma_descr_t dma_I2C_1_TX = { DMA1_Stream7, DMA_REQUEST_I2C1_TX, dma_id_7, &dma_init_struct_spi_i2c };
const dma_descr_t dma_I2C_2_TX = { DMA1_Stream7, DMA_REQUEST_I2C2_TX, dma_id_7, &dma_init_struct_spi_i2c };
// DMA2 streams
#if MICROPY_HW_ENABLE_DCMI
const dma_descr_t dma_DCMI_0 = { DMA2_Stream1, DMA_REQUEST_DCMI, dma_id_9, &dma_init_struct_dcmi };
#endif
const dma_descr_t dma_SPI_1_RX = { DMA2_Stream2, DMA_REQUEST_SPI1_RX, dma_id_10, &dma_init_struct_spi_i2c };
const dma_descr_t dma_SPI_5_RX = { DMA2_Stream3, DMA_REQUEST_SPI5_RX, dma_id_11, &dma_init_struct_spi_i2c };
const dma_descr_t dma_SPI_4_RX = { DMA2_Stream3, DMA_REQUEST_SPI4_RX, dma_id_11, &dma_init_struct_spi_i2c };
const dma_descr_t dma_SPI_5_TX = { DMA2_Stream4, DMA_REQUEST_SPI5_TX, dma_id_12, &dma_init_struct_spi_i2c };
const dma_descr_t dma_SPI_4_TX = { DMA2_Stream4, DMA_REQUEST_SPI4_TX, dma_id_12, &dma_init_struct_spi_i2c };
const dma_descr_t dma_SPI_6_TX = { DMA2_Stream5, BDMA_REQUEST_SPI6_TX, dma_id_13, &dma_init_struct_spi_i2c };
const dma_descr_t dma_SPI_1_TX = { DMA2_Stream5, DMA_REQUEST_SPI1_TX, dma_id_13, &dma_init_struct_spi_i2c };
const dma_descr_t dma_SPI_6_RX = { DMA2_Stream6, BDMA_REQUEST_SPI6_RX, dma_id_14, &dma_init_struct_spi_i2c };
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,
};
#endif
static DMA_HandleTypeDef *dma_handle[NSTREAM] = {NULL};
static uint8_t dma_last_sub_instance[NSTREAM];
static volatile uint32_t dma_enable_mask = 0;
volatile dma_idle_count_t dma_idle;
#define DMA_INVALID_CHANNEL 0xff // Value stored in dma_last_channel which means invalid
#if defined(STM32F0) || defined(STM32L0)
#define DMA1_IS_CLK_ENABLED() ((RCC->AHBENR & RCC_AHBENR_DMA1EN) != 0)
#if defined(DMA2)
#define DMA2_IS_CLK_ENABLED() ((RCC->AHBENR & RCC_AHBENR_DMA2EN) != 0)
#endif
#else
#define DMA1_IS_CLK_ENABLED() ((RCC->AHB1ENR & RCC_AHB1ENR_DMA1EN) != 0)
#define DMA2_IS_CLK_ENABLED() ((RCC->AHB1ENR & RCC_AHB1ENR_DMA2EN) != 0)
#endif
#if defined(STM32F0)
void DMA1_Ch1_IRQHandler(void) {
IRQ_ENTER(DMA1_Ch1_IRQn);
if (dma_handle[dma_id_0] != NULL) {
HAL_DMA_IRQHandler(dma_handle[dma_id_0]);
}
}
void DMA1_Ch2_3_DMA2_Ch1_2_IRQHandler(void) {
IRQ_ENTER(DMA1_Ch2_3_DMA2_Ch1_2_IRQn);
if (dma_handle[dma_id_1] != NULL) {
HAL_DMA_IRQHandler(dma_handle[dma_id_1]);
}
if (dma_handle[dma_id_2] != NULL) {
HAL_DMA_IRQHandler(dma_handle[dma_id_2]);
}
if (dma_handle[dma_id_7] != NULL) {
HAL_DMA_IRQHandler(dma_handle[dma_id_7]);
}
if (dma_handle[dma_id_8] != NULL) {
HAL_DMA_IRQHandler(dma_handle[dma_id_8]);
}
IRQ_EXIT(DMA1_Ch2_3_DMA2_Ch1_2_IRQn);
}
void DMA1_Ch4_7_DMA2_Ch3_5_IRQHandler(void) {
IRQ_ENTER(DMA1_Ch4_7_DMA2_Ch3_5_IRQn);
for (unsigned int i = 0; i < 4; ++i) {
if (dma_handle[dma_id_3 + i] != NULL) {
HAL_DMA_IRQHandler(dma_handle[dma_id_3 + i]);
}
// When i==3 this will check an invalid handle, but it will always be NULL
if (dma_handle[dma_id_9 + i] != NULL) {
HAL_DMA_IRQHandler(dma_handle[dma_id_9 + i]);
}
}
IRQ_EXIT(DMA1_Ch4_7_DMA2_Ch3_5_IRQn);
}
#elif defined(STM32F4) || defined(STM32F7) || defined(STM32H7)
void DMA1_Stream0_IRQHandler(void) { IRQ_ENTER(DMA1_Stream0_IRQn); if (dma_handle[dma_id_0] != NULL) { HAL_DMA_IRQHandler(dma_handle[dma_id_0]); } IRQ_EXIT(DMA1_Stream0_IRQn); }
void DMA1_Stream1_IRQHandler(void) { IRQ_ENTER(DMA1_Stream1_IRQn); if (dma_handle[dma_id_1] != NULL) { HAL_DMA_IRQHandler(dma_handle[dma_id_1]); } IRQ_EXIT(DMA1_Stream1_IRQn); }
void DMA1_Stream2_IRQHandler(void) { IRQ_ENTER(DMA1_Stream2_IRQn); if (dma_handle[dma_id_2] != NULL) { HAL_DMA_IRQHandler(dma_handle[dma_id_2]); } IRQ_EXIT(DMA1_Stream2_IRQn); }
void DMA1_Stream3_IRQHandler(void) { IRQ_ENTER(DMA1_Stream3_IRQn); if (dma_handle[dma_id_3] != NULL) { HAL_DMA_IRQHandler(dma_handle[dma_id_3]); } IRQ_EXIT(DMA1_Stream3_IRQn); }
void DMA1_Stream4_IRQHandler(void) { IRQ_ENTER(DMA1_Stream4_IRQn); if (dma_handle[dma_id_4] != NULL) { HAL_DMA_IRQHandler(dma_handle[dma_id_4]); } IRQ_EXIT(DMA1_Stream4_IRQn); }
void DMA1_Stream5_IRQHandler(void) { IRQ_ENTER(DMA1_Stream5_IRQn); if (dma_handle[dma_id_5] != NULL) { HAL_DMA_IRQHandler(dma_handle[dma_id_5]); } IRQ_EXIT(DMA1_Stream5_IRQn); }
void DMA1_Stream6_IRQHandler(void) { IRQ_ENTER(DMA1_Stream6_IRQn); if (dma_handle[dma_id_6] != NULL) { HAL_DMA_IRQHandler(dma_handle[dma_id_6]); } IRQ_EXIT(DMA1_Stream6_IRQn); }
void DMA1_Stream7_IRQHandler(void) { IRQ_ENTER(DMA1_Stream7_IRQn); if (dma_handle[dma_id_7] != NULL) { HAL_DMA_IRQHandler(dma_handle[dma_id_7]); } IRQ_EXIT(DMA1_Stream7_IRQn); }
void DMA2_Stream0_IRQHandler(void) { IRQ_ENTER(DMA2_Stream0_IRQn); if (dma_handle[dma_id_8] != NULL) { HAL_DMA_IRQHandler(dma_handle[dma_id_8]); } IRQ_EXIT(DMA2_Stream0_IRQn); }
void DMA2_Stream1_IRQHandler(void) { IRQ_ENTER(DMA2_Stream1_IRQn); if (dma_handle[dma_id_9] != NULL) { HAL_DMA_IRQHandler(dma_handle[dma_id_9]); } IRQ_EXIT(DMA2_Stream1_IRQn); }
void DMA2_Stream2_IRQHandler(void) { IRQ_ENTER(DMA2_Stream2_IRQn); if (dma_handle[dma_id_10] != NULL) { HAL_DMA_IRQHandler(dma_handle[dma_id_10]); } IRQ_EXIT(DMA2_Stream2_IRQn); }
void DMA2_Stream3_IRQHandler(void) { IRQ_ENTER(DMA2_Stream3_IRQn); if (dma_handle[dma_id_11] != NULL) { HAL_DMA_IRQHandler(dma_handle[dma_id_11]); } IRQ_EXIT(DMA2_Stream3_IRQn); }
void DMA2_Stream4_IRQHandler(void) { IRQ_ENTER(DMA2_Stream4_IRQn); if (dma_handle[dma_id_12] != NULL) { HAL_DMA_IRQHandler(dma_handle[dma_id_12]); } IRQ_EXIT(DMA2_Stream4_IRQn); }
void DMA2_Stream5_IRQHandler(void) { IRQ_ENTER(DMA2_Stream5_IRQn); if (dma_handle[dma_id_13] != NULL) { HAL_DMA_IRQHandler(dma_handle[dma_id_13]); } IRQ_EXIT(DMA2_Stream5_IRQn); }
void DMA2_Stream6_IRQHandler(void) { IRQ_ENTER(DMA2_Stream6_IRQn); if (dma_handle[dma_id_14] != NULL) { HAL_DMA_IRQHandler(dma_handle[dma_id_14]); } IRQ_EXIT(DMA2_Stream6_IRQn); }
void DMA2_Stream7_IRQHandler(void) { IRQ_ENTER(DMA2_Stream7_IRQn); if (dma_handle[dma_id_15] != NULL) { HAL_DMA_IRQHandler(dma_handle[dma_id_15]); } IRQ_EXIT(DMA2_Stream7_IRQn); }
#elif defined(STM32L0)
void DMA1_Channel1_IRQHandler(void) {
IRQ_ENTER(DMA1_Channel1_IRQn);
if (dma_handle[dma_id_0] != NULL) {
HAL_DMA_IRQHandler(dma_handle[dma_id_0]);
}
IRQ_EXIT(DMA1_Channel1_IRQn);
}
void DMA1_Channel2_3_IRQHandler(void) {
IRQ_ENTER(DMA1_Channel2_3_IRQn);
if (dma_handle[dma_id_1] != NULL) {
HAL_DMA_IRQHandler(dma_handle[dma_id_1]);
}
if (dma_handle[dma_id_2] != NULL) {
HAL_DMA_IRQHandler(dma_handle[dma_id_2]);
}
IRQ_EXIT(DMA1_Channel2_3_IRQn);
}
void DMA1_Channel4_5_6_7_IRQHandler(void) {
IRQ_ENTER(DMA1_Channel4_5_6_7_IRQn);
if (dma_handle[dma_id_3] != NULL) {
HAL_DMA_IRQHandler(dma_handle[dma_id_3]);
}
if (dma_handle[dma_id_4] != NULL) {
HAL_DMA_IRQHandler(dma_handle[dma_id_4]);
}
if (dma_handle[dma_id_5] != NULL) {
HAL_DMA_IRQHandler(dma_handle[dma_id_5]);
}
if (dma_handle[dma_id_6] != NULL) {
HAL_DMA_IRQHandler(dma_handle[dma_id_6]);
}
IRQ_EXIT(DMA1_Channel4_5_6_7_IRQn);
}
#elif defined(STM32L4)
void DMA1_Channel1_IRQHandler(void) { IRQ_ENTER(DMA1_Channel1_IRQn); if (dma_handle[dma_id_0] != NULL) { HAL_DMA_IRQHandler(dma_handle[dma_id_0]); } IRQ_EXIT(DMA1_Channel1_IRQn); }
void DMA1_Channel2_IRQHandler(void) { IRQ_ENTER(DMA1_Channel2_IRQn); if (dma_handle[dma_id_1] != NULL) { HAL_DMA_IRQHandler(dma_handle[dma_id_1]); } IRQ_EXIT(DMA1_Channel2_IRQn); }
void DMA1_Channel3_IRQHandler(void) { IRQ_ENTER(DMA1_Channel3_IRQn); if (dma_handle[dma_id_2] != NULL) { HAL_DMA_IRQHandler(dma_handle[dma_id_2]); } IRQ_EXIT(DMA1_Channel3_IRQn); }
void DMA1_Channel4_IRQHandler(void) { IRQ_ENTER(DMA1_Channel4_IRQn); if (dma_handle[dma_id_3] != NULL) { HAL_DMA_IRQHandler(dma_handle[dma_id_3]); } IRQ_EXIT(DMA1_Channel4_IRQn); }
void DMA1_Channel5_IRQHandler(void) { IRQ_ENTER(DMA1_Channel5_IRQn); if (dma_handle[dma_id_4] != NULL) { HAL_DMA_IRQHandler(dma_handle[dma_id_4]); } IRQ_EXIT(DMA1_Channel5_IRQn); }
void DMA1_Channel6_IRQHandler(void) { IRQ_ENTER(DMA1_Channel6_IRQn); if (dma_handle[dma_id_5] != NULL) { HAL_DMA_IRQHandler(dma_handle[dma_id_5]); } IRQ_EXIT(DMA1_Channel6_IRQn); }
void DMA1_Channel7_IRQHandler(void) { IRQ_ENTER(DMA1_Channel7_IRQn); if (dma_handle[dma_id_6] != NULL) { HAL_DMA_IRQHandler(dma_handle[dma_id_6]); } IRQ_EXIT(DMA1_Channel7_IRQn); }
void DMA2_Channel1_IRQHandler(void) { IRQ_ENTER(DMA2_Channel1_IRQn); if (dma_handle[dma_id_7] != NULL) { HAL_DMA_IRQHandler(dma_handle[dma_id_7]); } IRQ_EXIT(DMA2_Channel1_IRQn); }
void DMA2_Channel2_IRQHandler(void) { IRQ_ENTER(DMA2_Channel2_IRQn); if (dma_handle[dma_id_8] != NULL) { HAL_DMA_IRQHandler(dma_handle[dma_id_8]); } IRQ_EXIT(DMA2_Channel2_IRQn); }
void DMA2_Channel3_IRQHandler(void) { IRQ_ENTER(DMA2_Channel3_IRQn); if (dma_handle[dma_id_9] != NULL) { HAL_DMA_IRQHandler(dma_handle[dma_id_9]); } IRQ_EXIT(DMA2_Channel3_IRQn); }
void DMA2_Channel4_IRQHandler(void) { IRQ_ENTER(DMA2_Channel4_IRQn); if (dma_handle[dma_id_10] != NULL) { HAL_DMA_IRQHandler(dma_handle[dma_id_10]);} IRQ_EXIT(DMA2_Channel4_IRQn); }
void DMA2_Channel5_IRQHandler(void) { IRQ_ENTER(DMA2_Channel5_IRQn); if (dma_handle[dma_id_11] != NULL) { HAL_DMA_IRQHandler(dma_handle[dma_id_11]);} IRQ_EXIT(DMA2_Channel5_IRQn); }
void DMA2_Channel6_IRQHandler(void) { IRQ_ENTER(DMA2_Channel6_IRQn); if (dma_handle[dma_id_12] != NULL) { HAL_DMA_IRQHandler(dma_handle[dma_id_12]);} IRQ_EXIT(DMA2_Channel6_IRQn); }
void DMA2_Channel7_IRQHandler(void) { IRQ_ENTER(DMA2_Channel7_IRQn); if (dma_handle[dma_id_13] != NULL) { HAL_DMA_IRQHandler(dma_handle[dma_id_13]);} IRQ_EXIT(DMA2_Channel7_IRQn); }
#endif
static void dma_idle_handler(uint32_t tick);
// Resets the idle counter for the DMA controller associated with dma_id.
static void dma_tickle(dma_id_t dma_id) {
dma_idle.counter[(dma_id < NSTREAMS_PER_CONTROLLER) ? 0 : 1] = 1;
systick_enable_dispatch(SYSTICK_DISPATCH_DMA, dma_idle_handler);
}
static void dma_enable_clock(dma_id_t dma_id) {
// We don't want dma_tick_handler() to turn off the clock right after we
// enable it, so we need to mark the channel in use in an atomic fashion.
mp_uint_t irq_state = MICROPY_BEGIN_ATOMIC_SECTION();
uint32_t old_enable_mask = dma_enable_mask;
dma_enable_mask |= (1 << dma_id);
MICROPY_END_ATOMIC_SECTION(irq_state);
if (dma_id < NSTREAMS_PER_CONTROLLER) {
if (((old_enable_mask & DMA1_ENABLE_MASK) == 0) && !DMA1_IS_CLK_ENABLED()) {
__HAL_RCC_DMA1_CLK_ENABLE();
// We just turned on the clock. This means that anything stored
// in dma_last_channel (for DMA1) needs to be invalidated.
for (int channel = 0; channel < NSTREAMS_PER_CONTROLLER; channel++) {
dma_last_sub_instance[channel] = DMA_INVALID_CHANNEL;
}
}
}
#if defined(DMA2)
else {
if (((old_enable_mask & DMA2_ENABLE_MASK) == 0) && !DMA2_IS_CLK_ENABLED()) {
__HAL_RCC_DMA2_CLK_ENABLE();
// We just turned on the clock. This means that anything stored
// in dma_last_channel (for DMA2) needs to be invalidated.
for (int channel = NSTREAMS_PER_CONTROLLER; channel < NSTREAM; channel++) {
dma_last_sub_instance[channel] = DMA_INVALID_CHANNEL;
}
}
}
#endif
}
static void dma_disable_clock(dma_id_t dma_id) {
// We just mark the clock as disabled here, but we don't actually disable it.
// We wait for the timer to expire first, which means that back-to-back
// transfers don't have to initialize as much.
dma_tickle(dma_id);
dma_enable_mask &= ~(1 << dma_id);
}
void dma_init_handle(DMA_HandleTypeDef *dma, const dma_descr_t *dma_descr, uint32_t dir, void *data) {
// initialise parameters
dma->Instance = dma_descr->instance;
dma->Init = *dma_descr->init;
dma->Init.Direction = dir;
#if defined(STM32L0) || defined(STM32L4) || defined(STM32H7)
dma->Init.Request = dma_descr->sub_instance;
#else
#if !defined(STM32F0)
dma->Init.Channel = dma_descr->sub_instance;
#endif
#endif
// half of __HAL_LINKDMA(data, xxx, *dma)
// caller must implement other half by doing: data->xxx = dma
dma->Parent = data;
}
void dma_init(DMA_HandleTypeDef *dma, const dma_descr_t *dma_descr, uint32_t dir, void *data){
// Some drivers allocate the DMA_HandleTypeDef from the stack
// (i.e. dac, i2c, spi) and for those cases we need to clear the
// structure so we don't get random values from the stack)
memset(dma, 0, sizeof(*dma));
if (dma_descr != NULL) {
dma_id_t dma_id = dma_descr->id;
dma_init_handle(dma, dma_descr, dir, data);
// set global pointer for IRQ handler
dma_handle[dma_id] = dma;
dma_enable_clock(dma_id);
#if defined(STM32H7) || defined(STM32L4)
// Always reset and configure the H7 and L4 DMA peripheral
// (dma->State is set to HAL_DMA_STATE_RESET by memset above)
// TODO: understand how L4 DMA works so this is not needed
HAL_DMA_DeInit(dma);
HAL_DMA_Init(dma);
NVIC_SetPriority(IRQn_NONNEG(dma_irqn[dma_id]), IRQ_PRI_DMA);
#else
// if this stream was previously configured for this channel/request and direction then we
// can skip most of the initialisation
uint8_t sub_inst = DMA_SUB_INSTANCE_AS_UINT8(dma_descr->sub_instance) | (dir == DMA_PERIPH_TO_MEMORY) << 7;
if (dma_last_sub_instance[dma_id] != sub_inst) {
dma_last_sub_instance[dma_id] = sub_inst;
// reset and configure DMA peripheral
// (dma->State is set to HAL_DMA_STATE_RESET by memset above)
HAL_DMA_DeInit(dma);
HAL_DMA_Init(dma);
NVIC_SetPriority(IRQn_NONNEG(dma_irqn[dma_id]), IRQ_PRI_DMA);
#if defined(STM32F0)
if (dma->Instance < DMA2_Channel1) {
__HAL_DMA1_REMAP(dma_descr->sub_instance);
} else {
__HAL_DMA2_REMAP(dma_descr->sub_instance);
}
#endif
} else {
// only necessary initialization
dma->State = HAL_DMA_STATE_READY;
#if defined(STM32F0)
// These variables are used to access the relevant 4 bits in ISR and IFCR
if (dma_id < NSTREAMS_PER_CONTROLLER) {
dma->DmaBaseAddress = DMA1;
dma->ChannelIndex = dma_id * 4;
} else {
dma->DmaBaseAddress = DMA2;
dma->ChannelIndex = (dma_id - NSTREAMS_PER_CONTROLLER) * 4;
}
#elif defined(STM32F4) || defined(STM32F7)
// calculate DMA base address and bitshift to be used in IRQ handler
extern uint32_t DMA_CalcBaseAndBitshift(DMA_HandleTypeDef *hdma);
DMA_CalcBaseAndBitshift(dma);
#endif
}
#endif
HAL_NVIC_EnableIRQ(dma_irqn[dma_id]);
}
}
void dma_deinit(const dma_descr_t *dma_descr) {
if (dma_descr != NULL) {
#if !defined(STM32F0)
HAL_NVIC_DisableIRQ(dma_irqn[dma_descr->id]);
#endif
dma_handle[dma_descr->id] = NULL;
dma_disable_clock(dma_descr->id);
}
}
void dma_invalidate_channel(const dma_descr_t *dma_descr) {
if (dma_descr != NULL) {
dma_id_t dma_id = dma_descr->id;
// Only compare the sub-instance, not the direction bit (MSB)
if ((dma_last_sub_instance[dma_id] & 0x7f) == DMA_SUB_INSTANCE_AS_UINT8(dma_descr->sub_instance) ) {
dma_last_sub_instance[dma_id] = DMA_INVALID_CHANNEL;
}
}
}
// Called from the SysTick handler
// We use LSB of tick to select which controller to process
static void dma_idle_handler(uint32_t tick) {
if (!DMA_IDLE_ENABLED() || !DMA_IDLE_TICK(tick)) {
return;
}
static const uint32_t controller_mask[] = {
DMA1_ENABLE_MASK,
#if defined(DMA2)
DMA2_ENABLE_MASK,
#endif
};
{
int controller = (tick >> DMA_SYSTICK_LOG2) & 1;
if (dma_idle.counter[controller] == 0) {
return;
}
if (++dma_idle.counter[controller] > DMA_IDLE_TICK_MAX) {
if ((dma_enable_mask & controller_mask[controller]) == 0) {
// Nothing is active and we've reached our idle timeout,
// Now we'll really disable the clock.
dma_idle.counter[controller] = 0;
if (controller == 0) {
__HAL_RCC_DMA1_CLK_DISABLE();
}
#if defined(DMA2)
else {
__HAL_RCC_DMA2_CLK_DISABLE();
}
#endif
} else {
// Something is still active, but the counter never got
// reset, so we'll reset the counter here.
dma_idle.counter[controller] = 1;
}
}
}
}
#if defined(STM32F0) || defined(STM32L0) || defined(STM32L4)
void dma_nohal_init(const dma_descr_t *descr, uint32_t config) {
DMA_Channel_TypeDef *dma = descr->instance;
// Enable the DMA peripheral
dma_enable_clock(descr->id);
// Set main configuration register
dma->CCR =
descr->init->Priority // PL
| descr->init->MemInc // MINC
| descr->init->PeriphInc // PINC
| config // MSIZE | PSIZE | CIRC | DIR
;
// Select channel that the DMA stream uses
#if defined(STM32F0)
if (dma < DMA2_Channel1) {
__HAL_DMA1_REMAP(descr->sub_instance);
} else {
__HAL_DMA2_REMAP(descr->sub_instance);
}
#else
DMA_Request_TypeDef *dma_ctrl = (void*)(((uint32_t)dma & ~0xff) + (DMA1_CSELR_BASE - DMA1_BASE)); // DMA1_CSELR or DMA2_CSELR
uint32_t channel_number = (((uint32_t)dma & 0xff) - 0x08) / 20; // 0 through 6
uint32_t channel_pos = channel_number * 4;
dma_ctrl->CSELR = (dma_ctrl->CSELR & ~(0xf << channel_pos)) | (descr->sub_instance << channel_pos);
#endif
}
void dma_nohal_deinit(const dma_descr_t *descr) {
DMA_Channel_TypeDef *dma = descr->instance;
dma->CCR &= ~DMA_CCR_EN;
dma->CCR = 0;
dma->CNDTR = 0;
dma_deinit(descr);
}
void dma_nohal_start(const dma_descr_t *descr, uint32_t src_addr, uint32_t dst_addr, uint16_t len) {
DMA_Channel_TypeDef *dma = descr->instance;
dma->CNDTR = len;
dma->CPAR = dst_addr;
dma->CMAR = src_addr;
dma->CCR |= DMA_CCR_EN;
}
#else
void dma_nohal_init(const dma_descr_t *descr, uint32_t config) {
DMA_Stream_TypeDef *dma = descr->instance;
// Enable the DMA peripheral
dma_enable_clock(descr->id);
// Set main configuration register
const DMA_InitTypeDef *init = descr->init;
dma->CR =
descr->sub_instance // CHSEL
| init->MemBurst // MBURST
| init->PeriphBurst // PBURST
| init->Priority // PL
| init->MemInc // MINC
| init->PeriphInc // PINC
| config // MSIZE | PSIZE | CIRC | DIR
;
// Set FIFO control register
dma->FCR =
init->FIFOMode // DMDIS
| init->FIFOThreshold // FTH
;
}
void dma_nohal_deinit(const dma_descr_t *descr) {
DMA_Stream_TypeDef *dma = descr->instance;
dma->CR &= ~DMA_SxCR_EN;
uint32_t t0 = mp_hal_ticks_ms();
while ((dma->CR & DMA_SxCR_EN) && mp_hal_ticks_ms() - t0 < 100) {
}
dma->CR = 0;
dma->NDTR = 0;
dma->FCR = 0x21;
dma_deinit(descr);
}
void dma_nohal_start(const dma_descr_t *descr, uint32_t src_addr, uint32_t dst_addr, uint16_t len) {
DMA_Stream_TypeDef *dma = descr->instance;
dma->CR &= ~DMA_SxCR_DBM;
dma->NDTR = len;
dma->PAR = dst_addr;
dma->M0AR = src_addr;
dma->CR |= DMA_SxCR_EN;
}
#endif
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