Mercurial > public > ostc4
annotate Small_CPU/Src/uart.c @ 809:9602a7338f28
DevBugfix CO2 sensor in streaming mode:
In standalone mode (no multiplexer) the CO2 sensor is working in streaming mode => it could happen that the OSTC received data before the scaling factor was requested. As result the CO2 values were calculated with a zero value. This problem has been fixed.
In addition some code cleanup has been done. Unifying usage of changeBaudrate function instead of old baud selection based on protocol request of Discovery firmware.
| author | Ideenmodellierer |
|---|---|
| date | Sun, 27 Aug 2023 20:51:13 +0200 |
| parents | 96ffad0a4e57 |
| 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****/ |