circuitpython/ports/stm32/dma.c

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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
stm32/dac: Rework DAC driver to use direct register access. This patch makes the DAC driver simpler and removes the need for the ST HAL. As part of it, new helper functions are added to the DMA driver, which also use direct register access instead of the ST HAL. Main changes to the DAC interface are: - The DAC uPy object is no longer allocated dynamically on the heap, rather it's statically allocated and the same object is retrieved for subsequent uses of pyb.DAC(<id>). This allows to access the DAC objects without resetting the DAC peripheral. It also means that the DAC is only reset if explicitly passed initialisation parameters, like "bits" or "buffering". - The DAC.noise() and DAC.triangle() methods now output a signal which is full scale (previously it was a fraction of the full output voltage). - The DAC.write_timed() method is fixed so that it continues in the background when another peripheral (eg SPI) uses the DMA (previously the DAC would stop if another peripheral finished with the DMA and shut the DMA peripheral off completely). Based on the above, the following backwards incompatibilities are introduced: - pyb.DAC(id) will now only reset the DAC the first time it is called, whereas previously each call to create a DAC object would reset the DAC. To get the old behaviour pass the bits parameter like: pyb.DAC(id, bits). - DAC.noise() and DAC.triangle() are now full scale. To get previous behaviour (to change the amplitude and offset) write to the DAC_CR (MAMP bits) and DAC_DHR12Rx registers manually.
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* 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"
stm32/dac: Rework DAC driver to use direct register access. This patch makes the DAC driver simpler and removes the need for the ST HAL. As part of it, new helper functions are added to the DMA driver, which also use direct register access instead of the ST HAL. Main changes to the DAC interface are: - The DAC uPy object is no longer allocated dynamically on the heap, rather it's statically allocated and the same object is retrieved for subsequent uses of pyb.DAC(<id>). This allows to access the DAC objects without resetting the DAC peripheral. It also means that the DAC is only reset if explicitly passed initialisation parameters, like "bits" or "buffering". - The DAC.noise() and DAC.triangle() methods now output a signal which is full scale (previously it was a fraction of the full output voltage). - The DAC.write_timed() method is fixed so that it continues in the background when another peripheral (eg SPI) uses the DMA (previously the DAC would stop if another peripheral finished with the DMA and shut the DMA peripheral off completely). Based on the above, the following backwards incompatibilities are introduced: - pyb.DAC(id) will now only reset the DAC the first time it is called, whereas previously each call to create a DAC object would reset the DAC. To get the old behaviour pass the bits parameter like: pyb.DAC(id, bits). - DAC.noise() and DAC.triangle() are now full scale. To get previous behaviour (to change the amplitude and offset) write to the DAC_CR (MAMP bits) and DAC_DHR12Rx registers manually.
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#include "py/mphal.h"
#include "systick.h"
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#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
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#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))
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#define DMA1_ENABLE_MASK (0x007f) // Bits in dma_enable_mask corresponding to DMA1 (7 channels)
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#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 };
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#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};
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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)
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#define DMA1_IS_CLK_ENABLED() ((RCC->AHBENR & RCC_AHBENR_DMA1EN) != 0)
#if defined(DMA2)
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#define DMA2_IS_CLK_ENABLED() ((RCC->AHBENR & RCC_AHBENR_DMA2EN) != 0)
#endif
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#else
#define DMA1_IS_CLK_ENABLED() ((RCC->AHB1ENR & RCC_AHB1ENR_DMA1EN) != 0)
#define DMA2_IS_CLK_ENABLED() ((RCC->AHB1ENR & RCC_AHB1ENR_DMA2EN) != 0)
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#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
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#if !defined(STM32F0)
dma->Init.Channel = dma_descr->sub_instance;
#endif
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#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);
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#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;
}
}
}
}
stm32/dac: Rework DAC driver to use direct register access. This patch makes the DAC driver simpler and removes the need for the ST HAL. As part of it, new helper functions are added to the DMA driver, which also use direct register access instead of the ST HAL. Main changes to the DAC interface are: - The DAC uPy object is no longer allocated dynamically on the heap, rather it's statically allocated and the same object is retrieved for subsequent uses of pyb.DAC(<id>). This allows to access the DAC objects without resetting the DAC peripheral. It also means that the DAC is only reset if explicitly passed initialisation parameters, like "bits" or "buffering". - The DAC.noise() and DAC.triangle() methods now output a signal which is full scale (previously it was a fraction of the full output voltage). - The DAC.write_timed() method is fixed so that it continues in the background when another peripheral (eg SPI) uses the DMA (previously the DAC would stop if another peripheral finished with the DMA and shut the DMA peripheral off completely). Based on the above, the following backwards incompatibilities are introduced: - pyb.DAC(id) will now only reset the DAC the first time it is called, whereas previously each call to create a DAC object would reset the DAC. To get the old behaviour pass the bits parameter like: pyb.DAC(id, bits). - DAC.noise() and DAC.triangle() are now full scale. To get previous behaviour (to change the amplitude and offset) write to the DAC_CR (MAMP bits) and DAC_DHR12Rx registers manually.
2019-04-24 01:51:19 -04:00
#if defined(STM32F0) || defined(STM32L0) || defined(STM32L4)
stm32/dac: Rework DAC driver to use direct register access. This patch makes the DAC driver simpler and removes the need for the ST HAL. As part of it, new helper functions are added to the DMA driver, which also use direct register access instead of the ST HAL. Main changes to the DAC interface are: - The DAC uPy object is no longer allocated dynamically on the heap, rather it's statically allocated and the same object is retrieved for subsequent uses of pyb.DAC(<id>). This allows to access the DAC objects without resetting the DAC peripheral. It also means that the DAC is only reset if explicitly passed initialisation parameters, like "bits" or "buffering". - The DAC.noise() and DAC.triangle() methods now output a signal which is full scale (previously it was a fraction of the full output voltage). - The DAC.write_timed() method is fixed so that it continues in the background when another peripheral (eg SPI) uses the DMA (previously the DAC would stop if another peripheral finished with the DMA and shut the DMA peripheral off completely). Based on the above, the following backwards incompatibilities are introduced: - pyb.DAC(id) will now only reset the DAC the first time it is called, whereas previously each call to create a DAC object would reset the DAC. To get the old behaviour pass the bits parameter like: pyb.DAC(id, bits). - DAC.noise() and DAC.triangle() are now full scale. To get previous behaviour (to change the amplitude and offset) write to the DAC_CR (MAMP bits) and DAC_DHR12Rx registers manually.
2019-04-24 01:51:19 -04:00
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