src/main/drivers/serial_uart_stm32g4xx.c

   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  * Author: jflyper
  21  */
  22
  23 #include <stdbool.h>
  24 #include <stdint.h>
  25
  26 #include "platform.h"
  27
  28 #ifdef USE_UART
  29
  30 #include "drivers/system.h"
  31 #include "drivers/dma.h"
  32 #include "drivers/io.h"
  33 #include "drivers/nvic.h"
  34 #include "drivers/rcc.h"
  35
  36 #include "drivers/serial.h"
  37 #include "drivers/serial_uart.h"
  38 #include "drivers/serial_uart_impl.h"
  39
  40 #ifndef UART1_TX_DMA_CHANNEL
  41 #define UART1_TX_DMA_CHANNEL NULL
  42 #endif
  43 #ifndef UART1_RX_DMA_CHANNEL
  44 #define UART1_RX_DMA_CHANNEL NULL
  45 #endif
  46 #ifndef UART2_TX_DMA_CHANNEL
  47 #define UART2_TX_DMA_CHANNEL NULL
  48 #endif
  49 #ifndef UART2_RX_DMA_CHANNEL
  50 #define UART2_RX_DMA_CHANNEL NULL
  51 #endif
  52 #ifndef UART3_TX_DMA_CHANNEL
  53 #define UART3_TX_DMA_CHANNEL NULL
  54 #endif
  55 #ifndef UART3_RX_DMA_CHANNEL
  56 #define UART3_RX_DMA_CHANNEL NULL
  57 #endif
  58 #ifndef UART4_TX_DMA_CHANNEL
  59 #define UART4_TX_DMA_CHANNEL NULL
  60 #endif
  61 #ifndef UART4_RX_DMA_CHANNEL
  62 #define UART4_RX_DMA_CHANNEL NULL
  63 #endif
  64 #ifndef UART5_TX_DMA_CHANNEL
  65 #define UART5_TX_DMA_CHANNEL NULL
  66 #endif
  67 #ifndef UART5_RX_DMA_CHANNEL
  68 #define UART5_RX_DMA_CHANNEL NULL
  69 #endif
  70 #ifndef UART9_TX_DMA_CHANNEL
  71 #define UART9_TX_DMA_CHANNEL NULL
  72 #endif
  73 #ifndef UART9_RX_DMA_CHANNEL
  74 #define UART9_RX_DMA_CHANNEL NULL
  75 #endif
  76
  77 const uartHardware_t uartHardware[UARTDEV_COUNT] = {
  78 #ifdef USE_UART1
  79     {
  80         .device = UARTDEV_1,
  81         .reg = USART1,
  82 #ifdef USE_DMA
  83         .rxDMAChannel = DMA_REQUEST_USART1_RX,
  84         .rxDMAResource = (dmaResource_t *)UART1_RX_DMA_CHANNEL,
  85         .txDMAChannel = DMA_REQUEST_USART1_TX,
  86         .txDMAResource = (dmaResource_t *)UART1_TX_DMA_CHANNEL,
  87 #endif
  88         .rxPins = {
  89             { DEFIO_TAG_E(PA10), GPIO_AF7_USART1 },
  90             { DEFIO_TAG_E(PB7),  GPIO_AF7_USART1 },
  91             { DEFIO_TAG_E(PC5),  GPIO_AF7_USART1 },
  92         },
  93         .txPins = {
  94             { DEFIO_TAG_E(PA9),  GPIO_AF7_USART1 },
  95             { DEFIO_TAG_E(PB6),  GPIO_AF7_USART1 },
  96             { DEFIO_TAG_E(PC4),  GPIO_AF7_USART1 },
  97         },
  98         .rcc = RCC_APB2(USART1),
  99         .rxIrq = USART1_IRQn,
 100         .txPriority = NVIC_PRIO_SERIALUART1_TXDMA,
 101         .rxPriority = NVIC_PRIO_SERIALUART1,
 102         .txBuffer = uart1TxBuffer,
 103         .rxBuffer = uart1RxBuffer,
 104         .txBufferSize = sizeof(uart1TxBuffer),
 105         .rxBufferSize = sizeof(uart1RxBuffer),
 106     },
 107 #endif
 108
 109 #ifdef USE_UART2
 110     {
 111         .device = UARTDEV_2,
 112         .reg = USART2,
 113 #ifdef USE_DMA
 114         .rxDMAChannel = DMA_REQUEST_USART2_RX,
 115         .rxDMAResource = (dmaResource_t *)UART2_RX_DMA_CHANNEL,
 116         .txDMAChannel = DMA_REQUEST_USART2_TX,
 117         .txDMAResource = (dmaResource_t *)UART2_TX_DMA_CHANNEL,
 118 #endif
 119         .rxPins = {
 120             { DEFIO_TAG_E(PA3),  GPIO_AF7_USART2 },
 121             { DEFIO_TAG_E(PA15), GPIO_AF7_USART2 },
 122             { DEFIO_TAG_E(PB4),  GPIO_AF7_USART2 },
 123         },
 124         .txPins = {
 125             { DEFIO_TAG_E(PA2),  GPIO_AF7_USART2 },
 126             { DEFIO_TAG_E(PA14), GPIO_AF7_USART2 },
 127             { DEFIO_TAG_E(PB3),  GPIO_AF7_USART2 },
 128         },
 129         .rcc = RCC_APB11(USART2),
 130         .rxIrq = USART2_IRQn,
 131         .txPriority = NVIC_PRIO_SERIALUART2_TXDMA,
 132         .rxPriority = NVIC_PRIO_SERIALUART2,
 133         .txBuffer = uart2TxBuffer,
 134         .rxBuffer = uart2RxBuffer,
 135         .txBufferSize = sizeof(uart2TxBuffer),
 136         .rxBufferSize = sizeof(uart2RxBuffer),
 137     },
 138 #endif
 139
 140 #ifdef USE_UART3
 141     {
 142         .device = UARTDEV_3,
 143         .reg = USART3,
 144 #ifdef USE_DMA
 145         .rxDMAChannel = DMA_REQUEST_USART3_RX,
 146         .rxDMAResource = (dmaResource_t *)UART3_RX_DMA_CHANNEL,
 147         .txDMAChannel = DMA_REQUEST_USART3_TX,
 148         .txDMAResource = (dmaResource_t *)UART3_TX_DMA_CHANNEL,
 149 #endif
 150         .rxPins = {
 151             { DEFIO_TAG_E(PB8),  GPIO_AF7_USART3 },
 152             { DEFIO_TAG_E(PB11), GPIO_AF7_USART3 },
 153             { DEFIO_TAG_E(PC11), GPIO_AF7_USART3 },
 154         },
 155         .txPins = {
 156             { DEFIO_TAG_E(PB9),  GPIO_AF7_USART3 },
 157             { DEFIO_TAG_E(PB10), GPIO_AF7_USART3 },
 158             { DEFIO_TAG_E(PC10), GPIO_AF7_USART3 },
 159         },
 160         .rcc = RCC_APB11(USART3),
 161         .rxIrq = USART3_IRQn,
 162         .txPriority = NVIC_PRIO_SERIALUART3_TXDMA,
 163         .rxPriority = NVIC_PRIO_SERIALUART3,
 164         .txBuffer = uart3TxBuffer,
 165         .rxBuffer = uart3RxBuffer,
 166         .txBufferSize = sizeof(uart3TxBuffer),
 167         .rxBufferSize = sizeof(uart3RxBuffer),
 168     },
 169 #endif
 170
 171 #ifdef USE_UART4
 172     {
 173         .device = UARTDEV_4,
 174         .reg = UART4,
 175 #ifdef USE_DMA
 176         .rxDMAChannel = DMA_REQUEST_UART4_RX,
 177         .rxDMAResource = (dmaResource_t *)UART4_RX_DMA_CHANNEL,
 178         .txDMAChannel = DMA_REQUEST_UART4_TX,
 179         .txDMAResource = (dmaResource_t *)UART4_TX_DMA_CHANNEL,
 180 #endif
 181         .rxPins = {
 182             { DEFIO_TAG_E(PC11), GPIO_AF5_UART4 },
 183         },
 184         .txPins = {
 185             { DEFIO_TAG_E(PC10), GPIO_AF5_UART4 },
 186         },
 187         .rcc = RCC_APB11(UART4),
 188         .rxIrq = UART4_IRQn,
 189         .txPriority = NVIC_PRIO_SERIALUART4_TXDMA,
 190         .rxPriority = NVIC_PRIO_SERIALUART4,
 191         .txBuffer = uart4TxBuffer,
 192         .rxBuffer = uart4RxBuffer,
 193         .txBufferSize = sizeof(uart4TxBuffer),
 194         .rxBufferSize = sizeof(uart4RxBuffer),
 195     },
 196 #endif
 197
 198 #ifdef USE_UART5
 199     {
 200         .device = UARTDEV_5,
 201         .reg = UART5,
 202 #ifdef USE_DMA
 203         .rxDMAChannel = DMA_REQUEST_UART5_RX,
 204         .rxDMAResource = (dmaResource_t *)UART5_RX_DMA_CHANNEL,
 205         .txDMAChannel = DMA_REQUEST_UART5_TX,
 206         .txDMAResource = (dmaResource_t *)UART5_TX_DMA_CHANNEL,
 207 #endif
 208         .rxPins = {
 209             { DEFIO_TAG_E(PD2),  GPIO_AF5_UART5 },
 210         },
 211         .txPins = {
 212             { DEFIO_TAG_E(PC12), GPIO_AF5_UART5 },
 213         },
 214         .rcc = RCC_APB11(UART5),
 215         .rxIrq = UART5_IRQn,
 216         .txPriority = NVIC_PRIO_SERIALUART5_TXDMA,
 217         .rxPriority = NVIC_PRIO_SERIALUART5,
 218         .txBuffer = uart5TxBuffer,
 219         .rxBuffer = uart5RxBuffer,
 220         .txBufferSize = sizeof(uart5TxBuffer),
 221         .rxBufferSize = sizeof(uart5RxBuffer),
 222     },
 223 #endif
 224
 225 #ifdef USE_UART9
 226     // On G474, UART9 is implemented as LPUART1
 227     {
 228         .device = UARTDEV_9,
 229         .reg = LPUART1,
 230 #ifdef USE_DMA
 231         .rxDMAChannel = DMA_REQUEST_LPUART1_RX,
 232         .rxDMAResource = (dmaResource_t *)UART9_RX_DMA_CHANNEL,
 233         .txDMAChannel = DMA_REQUEST_LPUART1_TX,
 234         .txDMAResource = (dmaResource_t *)UART9_TX_DMA_CHANNEL,
 235 #endif
 236         .rxPins = {
 237             { DEFIO_TAG_E(PA3),  GPIO_AF12_LPUART1 },
 238             { DEFIO_TAG_E(PB10), GPIO_AF8_LPUART1 },
 239             { DEFIO_TAG_E(PC0),  GPIO_AF8_LPUART1 },
 240         },
 241         .txPins = {
 242             { DEFIO_TAG_E(PA2),  GPIO_AF12_LPUART1 },
 243             { DEFIO_TAG_E(PB11), GPIO_AF8_LPUART1 },
 244             { DEFIO_TAG_E(PC1),  GPIO_AF8_LPUART1 },
 245         },
 246         .rcc = RCC_APB12(LPUART1),
 247         .rxIrq = LPUART1_IRQn,
 248         .txPriority = NVIC_PRIO_SERIALUART6_TXDMA,
 249         .rxPriority = NVIC_PRIO_SERIALUART6,
 250         .txBuffer = uart9TxBuffer,
 251         .rxBuffer = uart9RxBuffer,
 252         .txBufferSize = sizeof(uart9TxBuffer),
 253         .rxBufferSize = sizeof(uart9RxBuffer),
 254     },
 255 #endif
 256 };
 257
 258
 259 // XXX Should serialUART be consolidated?
 260
 261 uartPort_t *serialUART(UARTDevice_e device, uint32_t baudRate, portMode_e mode, portOptions_e options)
 262 {
 263     uartDevice_t *uartdev = uartDevmap[device];
 264     if (!uartdev) {
 265         return NULL;
 266     }
 267
 268     uartPort_t *s = &(uartdev->port);
 269
 270     s->port.vTable = uartVTable;
 271
 272     s->port.baudRate = baudRate;
 273
 274     const uartHardware_t *hardware = uartdev->hardware;
 275
 276     s->USARTx = hardware->reg;
 277
 278     s->port.rxBuffer = hardware->rxBuffer;
 279     s->port.txBuffer = hardware->txBuffer;
 280     s->port.rxBufferSize = hardware->rxBufferSize;
 281     s->port.txBufferSize = hardware->txBufferSize;
 282
 283 #ifdef USE_DMA
 284     uartConfigureDma(uartdev);
 285 #endif
 286
 287     s->Handle.Instance = hardware->reg;
 288
 289     if (hardware->rcc) {
 290         RCC_ClockCmd(hardware->rcc, ENABLE);
 291     }
 292
 293     IO_t txIO = IOGetByTag(uartdev->tx.pin);
 294     IO_t rxIO = IOGetByTag(uartdev->rx.pin);
 295
 296     if ((options & SERIAL_BIDIR) && txIO) {
 297         ioConfig_t ioCfg = IO_CONFIG(
 298             ((options & SERIAL_INVERTED) || (options & SERIAL_BIDIR_PP) || (options & SERIAL_BIDIR_PP_PD)) ? GPIO_MODE_AF_PP : GPIO_MODE_AF_OD,
 299             GPIO_SPEED_FREQ_HIGH,
 300             (options & SERIAL_INVERTED) ? GPIO_PULLDOWN : GPIO_PULLUP
 301         );
 302
 303         IOInit(txIO, OWNER_SERIAL_TX, RESOURCE_INDEX(device));
 304         IOConfigGPIOAF(txIO, ioCfg, uartdev->tx.af);
 305     } else {
 306         if ((mode & MODE_TX) && txIO) {
 307             IOInit(txIO, OWNER_SERIAL_TX, RESOURCE_INDEX(device));
 308             IOConfigGPIOAF(txIO, IOCFG_AF_PP, uartdev->tx.af);
 309         }
 310
 311         if ((mode & MODE_RX) && rxIO) {
 312             IOInit(rxIO, OWNER_SERIAL_RX, RESOURCE_INDEX(device));
 313             IOConfigGPIOAF(rxIO, IOCFG_AF_PP, uartdev->rx.af);
 314         }
 315     }
 316
 317 #ifdef USE_DMA
 318     if (!s->rxDMAResource)
 319 #endif
 320     {
 321         HAL_NVIC_SetPriority(hardware->rxIrq, NVIC_PRIORITY_BASE(hardware->rxPriority), NVIC_PRIORITY_SUB(hardware->rxPriority));
 322         HAL_NVIC_EnableIRQ(hardware->rxIrq);
 323     }
 324
 325     return s;
 326 }
 327 #endif // USE_UART