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annotate Small_CPU/Src/uart.c @ 871:f7318457df4d default
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| author | heinrichsweikamp |
|---|---|
| date | Tue, 13 Aug 2024 13:24:54 +0200 |
| parents | 9602a7338f28 |
| children | c3dd461ca3f9 |
| rev | line source |
|---|---|
| 38 | 1 /** |
| 2 ****************************************************************************** | |
| 3 * @file uart.c | |
| 4 * @author heinrichs weikamp gmbh | |
| 5 * @version V0.0.1 | |
| 6 * @date 27-March-2014 | |
| 7 * @brief button control | |
| 8 * | |
| 9 @verbatim | |
| 10 ============================================================================== | |
| 11 ##### How to use ##### | |
| 12 ============================================================================== | |
| 13 @endverbatim | |
| 14 ****************************************************************************** | |
| 15 * @attention | |
| 16 * | |
| 17 * <h2><center>© COPYRIGHT(c) 2015 heinrichs weikamp</center></h2> | |
| 18 * | |
| 19 ****************************************************************************** | |
| 20 */ | |
| 21 /* Includes ------------------------------------------------------------------*/ | |
| 22 #include "uart.h" | |
| 794 | 23 #include "uartProtocol_O2.h" |
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24 #include "uartProtocol_Co2.h" |
| 662 | 25 #include "externalInterface.h" |
| 26 #include "data_exchange.h" | |
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27 #include <string.h> /* memset */ |
| 38 | 28 |
| 29 /* Private variables ---------------------------------------------------------*/ | |
| 30 | |
| 794 | 31 |
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32 |
| 781 | 33 #define CHUNK_SIZE (25u) /* the DMA will handle chunk size transfers */ |
| 34 #define CHUNKS_PER_BUFFER (5u) | |
| 794 | 35 |
| 662 | 36 UART_HandleTypeDef huart1; |
| 37 | |
| 38 DMA_HandleTypeDef hdma_usart1_rx; | |
| 38 | 39 |
| 662 | 40 uint8_t rxBuffer[CHUNK_SIZE * CHUNKS_PER_BUFFER]; /* The complete buffer has a X * chunk size to allow fariations in buffer read time */ |
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41 static uint8_t rxWriteIndex; /* Index of the data item which is analysed */ |
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42 static uint8_t rxReadIndex; /* Index at which new data is stared */ |
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43 static uint8_t lastCmdIndex; /* Index of last command which has not been completly received */ |
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44 static uint8_t dmaActive; /* Indicator if DMA reception needs to be started */ |
| 794 | 45 |
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46 |
| 742 | 47 static uint8_t SentinelConnected = 0; /* Binary indicator if a sensor is connected or not */ |
| 38 | 48 |
| 794 | 49 |
| 38 | 50 /* Exported functions --------------------------------------------------------*/ |
| 51 | |
| 794 | 52 |
| 662 | 53 void MX_USART1_UART_Init(void) |
| 38 | 54 { |
| 662 | 55 /* regular init */ |
| 56 | |
| 57 huart1.Instance = USART1; | |
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58 huart1.Init.BaudRate = 19200; |
| 662 | 59 huart1.Init.WordLength = UART_WORDLENGTH_8B; |
| 60 huart1.Init.StopBits = UART_STOPBITS_1; | |
| 61 huart1.Init.Parity = UART_PARITY_NONE; | |
| 62 huart1.Init.Mode = UART_MODE_TX_RX; | |
| 63 huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE; | |
| 64 huart1.Init.OverSampling = UART_OVERSAMPLING_16; | |
| 65 | |
| 66 HAL_UART_Init(&huart1); | |
| 67 | |
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68 MX_USART1_DMA_Init(); |
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69 |
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70 memset(rxBuffer,BUFFER_NODATA,sizeof(rxBuffer)); |
| 662 | 71 rxReadIndex = 0; |
| 72 lastCmdIndex = 0; | |
| 73 rxWriteIndex = 0; | |
| 74 dmaActive = 0; | |
| 794 | 75 |
| 742 | 76 SentinelConnected = 0; |
| 794 | 77 |
| 662 | 78 } |
| 38 | 79 |
| 662 | 80 void MX_USART1_UART_DeInit(void) |
| 81 { | |
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82 HAL_DMA_Abort(&hdma_usart1_rx); |
| 662 | 83 HAL_DMA_DeInit(&hdma_usart1_rx); |
| 84 HAL_UART_DeInit(&huart1); | |
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85 dmaActive = 0; |
| 662 | 86 } |
| 87 | |
| 88 void MX_USART1_DMA_Init() | |
| 89 { | |
| 90 /* DMA controller clock enable */ | |
| 91 __DMA2_CLK_ENABLE(); | |
| 92 | |
| 93 /* Peripheral DMA init*/ | |
| 94 hdma_usart1_rx.Instance = DMA2_Stream5; | |
| 95 hdma_usart1_rx.Init.Channel = DMA_CHANNEL_4; | |
| 96 hdma_usart1_rx.Init.Direction = DMA_PERIPH_TO_MEMORY; //DMA_MEMORY_TO_PERIPH; | |
| 97 hdma_usart1_rx.Init.PeriphInc = DMA_PINC_DISABLE; | |
| 98 hdma_usart1_rx.Init.MemInc = DMA_MINC_ENABLE; | |
| 99 hdma_usart1_rx.Init.PeriphDataAlignment = DMA_MDATAALIGN_BYTE; | |
| 100 hdma_usart1_rx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE; | |
| 101 hdma_usart1_rx.Init.Mode = DMA_NORMAL; | |
| 102 hdma_usart1_rx.Init.Priority = DMA_PRIORITY_LOW; | |
| 103 hdma_usart1_rx.Init.FIFOMode = DMA_FIFOMODE_DISABLE; | |
| 104 HAL_DMA_Init(&hdma_usart1_rx); | |
| 105 | |
| 106 __HAL_LINKDMA(&huart1,hdmarx,hdma_usart1_rx); | |
| 107 | |
| 108 /* DMA interrupt init */ | |
| 109 HAL_NVIC_SetPriority(DMA2_Stream5_IRQn, 0, 0); | |
| 110 HAL_NVIC_EnableIRQ(DMA2_Stream5_IRQn); | |
| 38 | 111 } |
| 112 | |
| 794 | 113 void UART_MUX_SelectAddress(uint8_t muxAddress) |
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114 { |
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115 uint8_t indexstr[4]; |
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116 |
| 794 | 117 if(muxAddress <= MAX_MUX_CHANNEL) |
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118 { |
| 794 | 119 indexstr[0] = '~'; |
| 120 indexstr[1] = muxAddress; | |
| 121 indexstr[2] = 0x0D; | |
| 122 indexstr[3] = 0x0A; | |
| 123 | |
| 124 HAL_UART_Transmit(&huart1,indexstr,4,10); | |
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125 } |
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126 } |
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127 |
| 794 | 128 |
| 129 void UART_SendCmdString(uint8_t *cmdString) | |
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130 { |
| 794 | 131 uint8_t cmdLength = strlen((char*)cmdString); |
| 132 | |
| 133 if(cmdLength < 20) /* A longer string is an indication for a missing 0 termination */ | |
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134 { |
| 794 | 135 if(dmaActive == 0) |
| 136 { | |
| 137 UART_StartDMA_Receiption(); | |
| 138 } | |
| 139 HAL_UART_Transmit(&huart1,cmdString,cmdLength,10); | |
| 140 } | |
| 141 } | |
| 142 | |
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143 |
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144 void StringToInt(char *pstr, uint32_t *puInt32) |
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145 { |
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146 uint8_t index = 0; |
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147 uint32_t result = 0; |
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148 while((pstr[index] >= '0') && (pstr[index] <= '9')) |
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149 { |
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150 result *=10; |
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151 result += pstr[index] - '0'; |
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152 index++; |
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153 } |
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154 *puInt32 = result; |
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155 } |
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156 |
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157 void StringToUInt64(char *pstr, uint64_t *puint64) |
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158 { |
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159 uint8_t index = 0; |
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160 uint64_t result = 0; |
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161 while((pstr[index] >= '0') && (pstr[index] <= '9')) |
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162 { |
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163 result *=10; |
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164 result += pstr[index] - '0'; |
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165 index++; |
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166 } |
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167 *puint64 = result; |
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168 } |
| 690 | 169 void ConvertByteToHexString(uint8_t byte, char* str) |
| 170 { | |
| 171 uint8_t worker = 0; | |
| 172 uint8_t digit = 0; | |
| 173 uint8_t digitCnt = 1; | |
| 38 | 174 |
| 690 | 175 worker = byte; |
| 176 while((worker!=0) && (digitCnt != 255)) | |
| 177 { | |
| 178 digit = worker % 16; | |
| 179 if( digit < 10) | |
| 180 { | |
| 181 digit += '0'; | |
| 182 } | |
| 183 else | |
| 184 { | |
| 185 digit += 'A' - 10; | |
| 186 } | |
| 187 str[digitCnt--]= digit; | |
| 188 worker = worker / 16; | |
| 189 } | |
| 190 } | |
| 662 | 191 |
| 742 | 192 void UART_StartDMA_Receiption() |
| 193 { | |
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194 if(dmaActive == 0) |
| 742 | 195 { |
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196 if(HAL_OK == HAL_UART_Receive_DMA (&huart1, &rxBuffer[rxWriteIndex], CHUNK_SIZE)) |
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197 { |
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198 dmaActive = 1; |
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199 } |
| 742 | 200 } |
| 201 } | |
| 690 | 202 |
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203 void UART_ChangeBaudrate(uint32_t newBaudrate) |
| 38 | 204 { |
| 809 | 205 uint8_t dmaWasActive = dmaActive; |
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206 // HAL_DMA_Abort(&hdma_usart1_rx); |
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207 MX_USART1_UART_DeInit(); |
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208 //HAL_UART_Abort(&huart1); |
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209 //HAL_DMA_DeInit(&hdma_usart1_rx); |
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210 |
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211 |
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212 // huart1.Instance->BRR = UART_BRR_SAMPLING8(HAL_RCC_GetPCLK2Freq()/2, newBaudrate); |
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213 huart1.Init.BaudRate = newBaudrate; |
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214 HAL_UART_Init(&huart1); |
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215 MX_USART1_DMA_Init(); |
| 809 | 216 if(dmaWasActive) |
| 794 | 217 { |
| 809 | 218 memset(rxBuffer,BUFFER_NODATA,sizeof(rxBuffer)); |
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219 rxReadIndex = 0; |
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220 rxWriteIndex = 0; |
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221 dmaActive = 0; |
| 742 | 222 UART_StartDMA_Receiption(); |
| 662 | 223 } |
| 38 | 224 } |
| 690 | 225 |
| 226 #ifdef ENABLE_SENTINEL_MODE | |
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227 void UART_HandleSentinelData(void) |
| 690 | 228 { |
| 229 uint8_t localRX = rxReadIndex; | |
| 230 static uint8_t dataType = 0; | |
| 231 static uint32_t dataValue[3]; | |
| 232 static uint8_t dataValueIdx = 0; | |
| 233 static receiveState_t rxState = RX_Ready; | |
| 234 static uint32_t lastReceiveTick = 0; | |
| 235 static uint8_t lastAlive = 0; | |
| 236 static uint8_t curAlive = 0; | |
| 237 static uint8_t checksum = 0; | |
| 742 | 238 static char checksum_str[]="00"; |
| 690 | 239 |
| 742 | 240 while((rxBuffer[localRX]!=0)) |
| 690 | 241 { |
| 242 lastReceiveTick = HAL_GetTick(); | |
| 243 | |
| 244 switch(rxState) | |
| 245 { | |
| 246 case RX_Ready: if((rxBuffer[localRX] >= 'a') && (rxBuffer[localRX] <= 'z')) | |
| 247 { | |
| 248 rxState = RX_DetectStart; | |
| 249 curAlive = rxBuffer[localRX]; | |
| 250 checksum = 0; | |
| 251 } | |
| 252 break; | |
| 253 | |
| 254 case RX_DetectStart: checksum += rxBuffer[localRX]; | |
| 255 if(rxBuffer[localRX] == '1') | |
| 256 { | |
| 257 rxState = RX_SelectData; | |
| 258 dataType = 0xFF; | |
| 259 | |
| 260 } | |
| 261 else | |
| 262 { | |
| 263 rxState = RX_Ready; | |
| 264 } | |
| 265 break; | |
| 266 | |
| 267 case RX_SelectData: checksum += rxBuffer[localRX]; | |
| 268 switch(rxBuffer[localRX]) | |
| 269 { | |
| 270 case 'T': dataType = rxBuffer[localRX]; | |
| 271 break; | |
| 272 case '0': if(dataType != 0xff) | |
| 273 { | |
| 274 rxState = RX_Data0; | |
| 275 dataValueIdx = 0; | |
| 276 dataValue[0] = 0; | |
| 277 | |
| 278 } | |
| 279 else | |
| 280 { | |
| 281 rxState = RX_Ready; | |
| 282 } | |
| 283 break; | |
| 284 default: rxState = RX_Ready; | |
| 285 } | |
| 286 break; | |
| 287 | |
| 288 case RX_Data0: | |
| 289 case RX_Data1: | |
| 290 case RX_Data2: | |
| 291 case RX_Data4: | |
| 292 case RX_Data5: | |
| 293 case RX_Data6: | |
| 294 case RX_Data8: | |
| 295 case RX_Data9: | |
| 296 case RX_Data10: checksum += rxBuffer[localRX]; | |
| 297 if((rxBuffer[localRX] >= '0') && (rxBuffer[localRX] <= '9')) | |
| 298 { | |
| 299 dataValue[dataValueIdx] = dataValue[dataValueIdx] * 10 + (rxBuffer[localRX] - '0'); | |
| 300 rxState++; | |
| 301 } | |
| 302 else | |
| 303 { | |
| 304 rxState = RX_Ready; | |
| 305 } | |
| 306 break; | |
| 307 | |
| 308 case RX_Data3: | |
| 309 case RX_Data7: checksum += rxBuffer[localRX]; | |
| 310 if(rxBuffer[localRX] == '0') | |
| 311 { | |
| 312 rxState++; | |
| 313 dataValueIdx++; | |
| 314 dataValue[dataValueIdx] = 0; | |
| 315 } | |
| 316 else | |
| 317 { | |
| 318 rxState = RX_Ready; | |
| 319 } | |
| 320 break; | |
| 321 case RX_Data11: rxState = RX_DataComplete; | |
| 322 ConvertByteToHexString(checksum,checksum_str); | |
| 323 if(rxBuffer[localRX] == checksum_str[0]) | |
| 324 { | |
| 325 rxState = RX_DataComplete; | |
| 326 } | |
| 327 else | |
| 328 { | |
| 329 rxState = RX_Ready; | |
| 330 } | |
| 331 | |
| 332 break; | |
| 333 | |
| 334 case RX_DataComplete: if(rxBuffer[localRX] == checksum_str[1]) | |
| 335 { | |
| 336 setExternalInterfaceChannel(0,(float)(dataValue[0] / 10.0)); | |
| 337 setExternalInterfaceChannel(1,(float)(dataValue[1] / 10.0)); | |
| 338 setExternalInterfaceChannel(2,(float)(dataValue[2] / 10.0)); | |
| 742 | 339 SentinelConnected = 1; |
| 690 | 340 } |
| 341 rxState = RX_Ready; | |
| 342 break; | |
| 343 | |
| 344 | |
| 345 default: rxState = RX_Ready; | |
| 346 break; | |
| 347 | |
| 348 } | |
| 349 localRX++; | |
| 350 rxReadIndex++; | |
| 351 if(rxReadIndex >= CHUNK_SIZE * CHUNKS_PER_BUFFER) | |
| 352 { | |
| 353 localRX = 0; | |
| 354 rxReadIndex = 0; | |
| 355 } | |
| 356 } | |
| 357 | |
| 358 if(time_elapsed_ms(lastReceiveTick,HAL_GetTick()) > 4000) /* check for communication timeout */ | |
| 359 { | |
| 360 if(curAlive == lastAlive) | |
| 361 { | |
| 362 setExternalInterfaceChannel(0,0.0); | |
| 363 setExternalInterfaceChannel(1,0.0); | |
| 364 setExternalInterfaceChannel(2,0.0); | |
| 742 | 365 SentinelConnected = 0; |
| 690 | 366 } |
| 367 lastAlive = curAlive; | |
| 368 } | |
| 369 | |
| 370 if((dmaActive == 0) && (externalInterface_isEnabledPower33())) /* Should never happen in normal operation => restart in case of communication error */ | |
| 371 { | |
| 742 | 372 UART_StartDMA_Receiption(); |
| 690 | 373 } |
| 374 } | |
| 375 #endif | |
| 38 | 376 |
|
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377 |
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378 |
| 742 | 379 uint8_t UART_isSentinelConnected() |
| 380 { | |
| 381 return SentinelConnected; | |
| 382 } | |
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383 |
| 662 | 384 void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart) |
| 38 | 385 { |
| 662 | 386 if(huart == &huart1) |
| 387 { | |
| 388 dmaActive = 0; | |
| 389 rxWriteIndex+=CHUNK_SIZE; | |
| 390 if(rxWriteIndex >= CHUNK_SIZE * CHUNKS_PER_BUFFER) | |
| 391 { | |
| 392 rxWriteIndex = 0; | |
| 393 } | |
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394 if((rxWriteIndex / CHUNK_SIZE) != (rxReadIndex / CHUNK_SIZE) || (rxWriteIndex == rxReadIndex)) /* start next transfer if we did not catch up with read index */ |
| 662 | 395 { |
| 809 | 396 UART_StartDMA_Receiption(); |
| 662 | 397 } |
| 398 } | |
| 38 | 399 } |
| 400 | |
| 794 | 401 void UART_ReadData(uint8_t sensorType) |
| 402 { | |
| 403 uint8_t localRX = rxReadIndex; | |
| 38 | 404 |
| 794 | 405 while((rxBuffer[localRX]!=BUFFER_NODATA)) |
| 406 { | |
| 407 switch (sensorType) | |
| 408 { | |
| 409 case SENSOR_MUX: | |
| 410 case SENSOR_DIGO2: uartO2_ProcessData(rxBuffer[localRX]); | |
| 411 break; | |
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412 #ifdef ENABLE_CO2_SUPPORT |
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413 case SENSOR_CO2: uartCo2_ProcessData(rxBuffer[localRX]); |
| 794 | 414 break; |
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415 #endif |
| 794 | 416 default: |
| 417 break; | |
| 418 } | |
| 419 | |
| 420 rxBuffer[localRX] = BUFFER_NODATA; | |
| 421 localRX++; | |
| 422 rxReadIndex++; | |
| 423 if(rxReadIndex >= CHUNK_SIZE * CHUNKS_PER_BUFFER) | |
| 424 { | |
| 425 localRX = 0; | |
| 426 rxReadIndex = 0; | |
| 427 } | |
| 428 } | |
| 429 } | |
| 430 | |
| 431 void UART_FlushRxBuffer(void) | |
| 432 { | |
| 433 while(rxBuffer[rxReadIndex] != BUFFER_NODATA) | |
| 434 { | |
| 435 rxBuffer[rxReadIndex] = BUFFER_NODATA; | |
| 436 rxReadIndex++; | |
| 437 if(rxReadIndex >= CHUNK_SIZE * CHUNKS_PER_BUFFER) | |
| 438 { | |
| 439 rxReadIndex = 0; | |
| 440 } | |
| 441 } | |
| 442 } | |
| 662 | 443 |
| 809 | 444 |
| 445 | |
| 38 | 446 /************************ (C) COPYRIGHT heinrichs weikamp *****END OF FILE****/ |