src/main/drivers/dma_reqmap.h

   1 /*
   2  * This file is part of Cleanflight and Betaflight.
   3  *
   4  * Cleanflight and Betaflight are free software. You can redistribute
   5  * this software and/or modify this software under the terms of the
   6  * GNU General Public License as published by the Free Software
   7  * Foundation, either version 3 of the License, or (at your option)
   8  * any later version.
   9  *
  10  * Cleanflight and Betaflight are distributed in the hope that they
  11  * will be useful, but WITHOUT ANY WARRANTY; without even the implied
  12  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  13  * See the GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this software.
  17  *
  18  * If not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #pragma once
  22
  23 #include "platform.h"
  24
  25 #include "drivers/dma.h"
  26 #include "drivers/timer.h"
  27
  28 typedef uint16_t dmaCode_t;
  29
  30 typedef struct dmaChannelSpec_s {
  31     dmaCode_t             code;
  32     dmaResource_t         *ref;
  33 #if defined(STM32F4) || defined(STM32F7) || defined(STM32H7) || defined(STM32G4)
  34     uint32_t              channel;
  35 #endif
  36 } dmaChannelSpec_t;
  37
  38 #define DMA_CODE(dma, stream, chanreq) ((dma << 12)|(stream << 8)|(chanreq << 0))
  39 #define DMA_CODE_CONTROLLER(code) ((code >> 12) & 0xf)
  40 #define DMA_CODE_STREAM(code) ((code >> 8) & 0xf)
  41 #define DMA_CODE_CHANNEL(code) ((code >> 0) & 0xff)
  42 #define DMA_CODE_REQUEST(code) DMA_CODE_CHANNEL(code)
  43
  44 typedef enum {
  45     DMA_PERIPH_SPI_MOSI,
  46     DMA_PERIPH_SPI_MISO,
  47     DMA_PERIPH_ADC,
  48     DMA_PERIPH_SDIO,
  49     DMA_PERIPH_UART_TX,
  50     DMA_PERIPH_UART_RX,
  51     DMA_PERIPH_TIMUP,
  52 } dmaPeripheral_e;
  53
  54 typedef int8_t dmaoptValue_t;
  55
  56 #define DMA_OPT_UNUSED (-1)
  57
  58 #if defined(STM32H7) || defined(STM32G4)
  59 #define MAX_PERIPHERAL_DMA_OPTIONS 16
  60 #define MAX_TIMER_DMA_OPTIONS 16
  61 #else
  62 #define MAX_PERIPHERAL_DMA_OPTIONS 2
  63 #define MAX_TIMER_DMA_OPTIONS 3
  64 #endif
  65
  66 struct timerHardware_s;
  67
  68 dmaoptValue_t dmaoptByTag(ioTag_t ioTag);
  69 const dmaChannelSpec_t *dmaGetChannelSpecByPeripheral(dmaPeripheral_e device, uint8_t index, int8_t opt);
  70 const dmaChannelSpec_t *dmaGetChannelSpecByTimerValue(TIM_TypeDef *tim, uint8_t channel, dmaoptValue_t dmaopt);
  71 const dmaChannelSpec_t *dmaGetChannelSpecByTimer(const struct timerHardware_s *timer);
  72 dmaoptValue_t dmaGetOptionByTimer(const struct timerHardware_s *timer);
  73 dmaoptValue_t dmaGetUpOptionByTimer(const struct timerHardware_s *timer);