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00119 #include "board.h"
00120 #include "..\..\..\..\utils\utility.h"
00121 #include <string.h>
00122 #include <stdio.h>
00123 #include <stdlib.h>
00124 #include "..\..\..\..\utils\md5\md5.h"
00125
00126
00127
00128
00129
00130 #define FULL_DUPLEX
00131
00132 #define BUFFER_SIZE 128
00133
00134
00135 #define PINS_USART PIN_USART0_TXD, PIN_USART0_RXD, PIN_USART0_RTS, PIN_USART0_CTS
00136
00137
00138 #define BASE_USART USART0
00139
00140
00141 #define BASE_USART_IRQ USART0_IRQn
00142
00143
00144 #define ID_USART ID_USART0
00145
00146 #define USART_Interrupt USART0_Handler
00147
00148 #define USART_TX_TIMEOUT 5000 // 5 seconds
00149
00150
00151
00152 #define USART_DMA_LLI 10
00153
00154 #define APP_BUFFER ( 100*1024) // 100 KB
00155 #define RX_BUFFER ( BUFFER_SIZE * USART_DMA_LLI ) // RingBuffer's Size
00156 #define MIN_FREE_BYTES ( BUFFER_SIZE * (USART_DMA_LLI-1) ) // min free bytes in ring buffer
00157 #define MAX_FREE_BYTES ( BUFFER_SIZE * (USART_DMA_LLI-2) ) // min free bytes in ring buffer
00158
00159 #define XDMA_NVIC_PRIO 1
00160 #define USART_NVIC_PRIO 3
00161 #define TC_NVIC_PRIO 4
00162
00163 #ifdef USE_MD5_CHECK
00164 static md5_state_t pms;
00165 static uint8_t md5[16];
00166 #endif
00167
00168
00169
00170
00171
00172 COMPILER_PACK_SET(4)
00173 typedef struct
00174 {
00175 uint8_t *pBuffer;
00176 const uint8_t reserved[3];
00177 uint32_t BuffSize;
00178 volatile uint32_t Count;
00179 volatile uint32_t *pHead;
00180 uint32_t pTail;
00181 } RignBuffer_t;
00182 COMPILER_PACK_RESET()
00183
00184
00185
00186
00187
00188 static sXdmad ChDma;
00189
00190 static UsartDma Usartd;
00191 static UsartChannel UsartTx, UsartRx;
00192
00193
00194
00195 const Pin pins[] = {PINS_USART};
00196
00197
00198 volatile uint32_t mutexTimeout;
00199 volatile uint8_t semaphore = 0;
00200 volatile uint32_t dmaflush = 0;
00201 static uint32_t TotalbytesReceived = 0;
00202 static uint8_t PingPongBufferFlag = 0;
00203 volatile uint32_t TimeOutTimer = 0;
00204
00205
00206
00207
00208
00209 uint8_t pRxBuffer[RX_BUFFER] ;
00210
00211
00212 uint8_t FirstAppBuff[APP_BUFFER];
00213 uint8_t SecondAppBuff[APP_BUFFER];
00214
00215 COMPILER_WORD_ALIGNED RignBuffer_t *pUsartBuffer;
00216
00217 static void _DmaRxCallback( uint8_t status, void* pArg );
00218
00219
00220
00221 #ifdef FULL_DUPLEX
00222 __STATIC_INLINE void _UpdateTxConfig(uint32_t Source, uint32_t size)
00223 {
00224 XDMAC_SetSourceAddr(ChDma.pXdmacs, UsartTx.ChNum, Source);
00225 XDMAC_SetMicroblockControl(ChDma.pXdmacs, UsartTx.ChNum, size);
00226 SCB_CleanInvalidateDCache();
00227 }
00228
00229
00230
00231
00232 static void _DmaTxCallback( uint8_t status, void* pArg )
00233 {
00234 UsartTx.dmaProgress = 1;
00235 if(PingPongBufferFlag) {
00236 _UpdateTxConfig((uint32_t)&SecondAppBuff[0], APP_BUFFER);
00237 } else {
00238 _UpdateTxConfig((uint32_t)&FirstAppBuff[0], APP_BUFFER);
00239 }
00240 }
00241
00242
00243
00244
00245
00246 __STATIC_INLINE void FlushTxBuffer(uint32_t TxBytesLeft)
00247 {
00248 if(PingPongBufferFlag) {
00249 _UpdateTxConfig((uint32_t)&SecondAppBuff[0], TxBytesLeft);
00250 } else {
00251 _UpdateTxConfig((uint32_t)&FirstAppBuff[0], TxBytesLeft);
00252 }
00253 USARTD_SendData(&Usartd);
00254 while(!UsartTx.dmaProgress);
00255 }
00256
00257 #endif
00258
00259
00260
00261 __STATIC_INLINE void _UpdateCount(void)
00262 {
00263
00264 if(pUsartBuffer->pTail != *pUsartBuffer->pHead ) {
00265 if(pUsartBuffer->pTail > *pUsartBuffer->pHead ) {
00266 pUsartBuffer->Count = (pUsartBuffer->BuffSize -
00267 (pUsartBuffer->pTail % *pUsartBuffer->pHead));
00268 } else {
00269 pUsartBuffer->Count = (*pUsartBuffer->pHead % pUsartBuffer->pTail);
00270 }
00271 }
00272 memory_barrier();
00273 TRACE_DEBUG("COUNT is %d \n\r",pUsartBuffer->Count);
00274 }
00275
00276
00277
00278
00279 void XDMAC_Handler(void)
00280 {
00281 XDMAD_Handler(&ChDma);
00282 }
00283
00284
00285
00286
00287 void USART_Interrupt(void)
00288 {
00289 if(BASE_USART->US_CSR & US_CSR_TIMEOUT) {
00290
00291 USART_AcknowledgeRxTimeOut(BASE_USART, 0);
00292
00293 BASE_USART->US_CR = US_CR_RTSEN;
00294 XDMAC_SoftwareFlushReq(ChDma.pXdmacs, UsartRx.ChNum);
00295 dmaflush++;
00296 TRACE_DEBUG(" Time out \n\r");
00297 }
00298 }
00299
00300
00301
00302
00303 static void _DmaRxCallback( uint8_t status, void* pArg )
00304 {
00305 mutexTimeout = 0x7FF;
00306 while(LockMutex(semaphore, mutexTimeout));
00307 _UpdateCount();
00308 if (__LDREXW(&pUsartBuffer->Count) >= MAX_FREE_BYTES) {
00309
00310
00311
00312 BASE_USART->US_CR = US_CR_RTSEN;
00313 }
00314 ReleaseMutex(semaphore);
00315 }
00316
00317
00318
00319
00320 __STATIC_INLINE void _initCircularBuffer(RignBuffer_t *pBuff)
00321 {
00322 pBuff->pBuffer = &pRxBuffer[0];
00323 pBuff->BuffSize = RX_BUFFER;
00324 pBuff->pTail = (uint32_t )pRxBuffer;
00325
00326 pBuff->pHead = &ChDma.pXdmacs->XDMAC_CHID[UsartRx.ChNum].XDMAC_CDA;
00327 pBuff->Count = 0;
00328 }
00329
00330
00331
00332
00333
00334
00335
00336 __STATIC_INLINE void _ConfigureUsart( uint32_t baudrate, uint32_t rxTimeout )
00337 {
00338 uint32_t mode = 0
00339 | US_MR_USART_MODE_HW_HANDSHAKING
00340 | US_MR_USCLKS_MCK
00341 | US_MR_CHRL_8_BIT
00342 | US_MR_PAR_NO
00343 | US_MR_NBSTOP_1_BIT
00344 | US_MR_CHMODE_NORMAL ;
00345
00346
00347 memset(&UsartTx, 0, sizeof(UsartChannel));
00348 memset(&UsartRx, 0, sizeof(UsartChannel));
00349
00350
00351 UsartRx.BuffSize= BUFFER_SIZE;
00352 UsartRx.pBuff = pRxBuffer;
00353 UsartRx.callback = _DmaRxCallback;
00354 UsartRx.dmaProgrammingMode = XDMAD_LLI;
00355 UsartRx.dmaBlockSize = USART_DMA_LLI;
00356 UsartRx.dmaRingBuffer = 1;
00357 UsartRx.dmaProgress = 1;
00358
00359
00360 #ifdef FULL_DUPLEX
00361 UsartTx.BuffSize= APP_BUFFER;
00362 UsartTx.pBuff = FirstAppBuff;
00363 UsartTx.callback = _DmaTxCallback;
00364 UsartTx.dmaProgrammingMode = XDMAD_SINGLE;
00365 UsartTx.dmaBlockSize = 0;
00366 UsartTx.dmaRingBuffer = 0;
00367 #endif
00368 UsartTx.dmaProgress = 1;
00369
00370 Usartd.pXdmad = &ChDma;
00371 Usartd.pRxChannel = &UsartRx;
00372 Usartd.pTxChannel = &UsartTx;
00373 USARTD_Configure(&Usartd, ID_USART, mode, baudrate, BOARD_MCK);
00374
00375 NVIC_ClearPendingIRQ(BASE_USART_IRQ);
00376 NVIC_SetPriority( BASE_USART_IRQ , USART_NVIC_PRIO);
00377
00378 USART_EnableIt(BASE_USART, US_IER_TIMEOUT);
00379
00380 NVIC_EnableIRQ(BASE_USART_IRQ);
00381 USART_EnableRecvTimeOut( BASE_USART, rxTimeout);
00382 TRACE_INFO("Baudrate is set to %u and TimeOut is %f Sec",
00383 (unsigned)baudrate, (float)((float)rxTimeout/baudrate) );
00384 }
00385
00386
00387
00388
00389
00390
00391
00392
00393
00394
00395 static uint32_t RingBufferRead(RignBuffer_t *pBuff, uint8_t *pDestination, uint32_t Len)
00396 {
00397 uint32_t EndAddrs = ( (uint32_t)pBuff->pBuffer + pBuff->BuffSize);
00398 uint32_t UnreadCount = 0;
00399 uint32_t EnableRTS = 0;
00400 uint32_t TotalLen = 0;
00401 uint32_t TailAddrs, BytesLeft;
00402
00403
00404 if(dmaflush) {
00405 mutexTimeout = 0x7FF;
00406 BASE_USART->US_CR = US_CR_RTSEN;
00407 __disable_irq();
00408 while(LockMutex(semaphore, mutexTimeout));
00409 SCB_CleanInvalidateDCache();
00410 _UpdateCount();
00411
00412 if( pBuff->Count < MAX_FREE_BYTES ) {
00413 EnableRTS = US_CR_RTSDIS;
00414 }
00415 dmaflush = 0;
00416 memory_sync();
00417 ReleaseMutex(semaphore);
00418 BASE_USART->US_CR = EnableRTS;
00419 __enable_irq();
00420 }
00421
00422
00423
00424 if(pBuff->Count)
00425 {
00426 UnreadCount = __LDREXW(&pBuff->Count);
00427 memory_barrier();
00428 TotalLen = (Len > UnreadCount) ? UnreadCount : Len;
00429
00430
00431 if( (pBuff->pTail + TotalLen) >= EndAddrs) {
00432 BytesLeft = (EndAddrs - pBuff->pTail);
00433 memcpy( pDestination , (uint32_t *)pBuff->pTail, BytesLeft );
00434
00435 memcpy( (pDestination +(EndAddrs - pBuff->pTail)) ,
00436 (uint32_t *)(pBuff->pBuffer), TotalLen - BytesLeft );
00437 TailAddrs = ( (uint32_t)pBuff->pBuffer + (TotalLen - BytesLeft));
00438 } else {
00439 memcpy( pDestination , (uint32_t *)pBuff->pTail, TotalLen );
00440 TailAddrs = pBuff->pTail + TotalLen;
00441 }
00442
00443
00444
00445
00446
00447 BASE_USART->US_CR = US_CR_RTSEN;
00448 __disable_irq();
00449 mutexTimeout = 0x7FF;
00450 while(LockMutex(semaphore, mutexTimeout));
00451 pBuff->pTail = TailAddrs;
00452 pBuff->Count -=TotalLen;
00453 TotalbytesReceived +=TotalLen;
00454 memory_sync();
00455 #ifdef FULL_DUPLEX
00456 TimeOutTimer = GetTicks();
00457 #endif
00458
00459 if( pUsartBuffer->Count < MAX_FREE_BYTES ) {
00460 EnableRTS = US_CR_RTSDIS;
00461 }
00462 ReleaseMutex(semaphore);
00463 BASE_USART->US_CR = EnableRTS;
00464 __enable_irq();
00465
00466 printf("\r Total bytes received 0x%x (%u)", \
00467 (unsigned)TotalbytesReceived, (unsigned)TotalbytesReceived);
00468
00469 return TotalLen;
00470 }
00471 else
00472 {
00473 return 0;
00474 }
00475 }
00476
00477
00478
00479
00480
00481
00482
00483
00484
00485
00486
00487
00488
00489
00490
00491 int main( void )
00492 {
00493 char pbaud_time[8];
00494 uint32_t BytesRead, BytesToRead, baudrate, timeout, TxBytesLeft;
00495 uint8_t AppBufferRollOver = 0;
00496 uint8_t *pTxBuff;
00497
00498
00499 WDT_Disable( WDT ) ;
00500
00501 printf( "-- USART Hardware Handshaking Example %s --\n\r", SOFTPACK_VERSION ) ;
00502 printf( "-- %s\n\r", BOARD_NAME ) ;
00503 printf( "-- Compiled: %s %s With %s--\n\r", __DATE__, __TIME__ , COMPILER_NAME) ;
00504
00505
00506 SCB_EnableICache();
00507 SCB_EnableDCache();
00508
00509
00510 PIO_Configure( pins, PIO_LISTSIZE( pins ) ) ;
00511
00512
00513 TimeTick_Configure ();
00514
00515 NVIC_SetPriority( XDMAC_IRQn , XDMA_NVIC_PRIO);
00516
00517
00518 printf("\n\rEnter required baudrate:");
00519 gets(pbaud_time);
00520 baudrate = (atoi(pbaud_time)) ? (atoi(pbaud_time)): 921600;
00521 printf("\n\rEnter required timeout (in microsec):");
00522 gets(pbaud_time);
00523
00524 timeout = atoi(pbaud_time);
00525 if(timeout > 1000) {
00526 timeout /= 1000;
00527 timeout = ( ( timeout * baudrate) / 1000 );
00528 } else {
00529 timeout = ( timeout * baudrate) / 1000000 ;
00530 }
00531 timeout = (timeout) ? ((timeout > MAX_RX_TIMEOUT) ? MAX_RX_TIMEOUT : timeout ) \
00532 : MAX_RX_TIMEOUT;
00533 printf("\n\r");
00534
00535 _ConfigureUsart(baudrate, timeout) ;
00536 printf("\n\r");
00537
00538
00539 USARTD_EnableRxChannels(&Usartd, &UsartRx);
00540
00541 #ifdef FULL_DUPLEX
00542
00543 USARTD_EnableTxChannels(&Usartd, &UsartTx);
00544 #endif
00545
00546
00547 USARTD_RcvData( &Usartd );
00548
00549
00550 pUsartBuffer = (RignBuffer_t *)malloc(sizeof(RignBuffer_t));
00551 _initCircularBuffer(pUsartBuffer);
00552
00553 pTxBuff = &FirstAppBuff[0];
00554
00555 TxBytesLeft = 0;
00556
00557 #ifdef USE_MD5_CHECK
00558 md5_init(&pms);
00559 #endif //USE_MD5_CHECK
00560
00561 #ifdef FULL_DUPLEX
00562 printf( "\n\r-I- USART is in Full Duplex mode \n\r") ;
00563 #else
00564 printf( "\n\r-I- USART is in Half Duplex mode \n\r") ;
00565 #endif
00566 printf( "\n\r-I- Please send a file to serial port (USART0) \n\r") ;
00567 BytesToRead = MIN_FREE_BYTES;
00568
00569 while(1) {
00570 #ifdef USE_MD5_CHECK
00571 if(DBG_IsRxReady()) {
00572 ch = DBG_GetChar();
00573 if(ch == 'm') {
00574 uint8_t i;
00575 md5_finish(&pms, md5);
00576 printf("\r\nmd5:");
00577 for(i=0;i<sizeof(md5);i++)
00578 printf("%.2x",md5[i]);
00579 printf("\r\n");
00580 md5_init(&pms);
00581 TotalbytesReceived = 0;
00582 }
00583 }
00584 #endif
00585
00586 if( (( PingPongBufferFlag == 0) &&
00587 (pTxBuff+BytesToRead) >= &FirstAppBuff[APP_BUFFER]) ||
00588 (( PingPongBufferFlag == 1) && (pTxBuff+BytesToRead) >=
00589 &SecondAppBuff[APP_BUFFER] ) ) {
00590 AppBufferRollOver = 1;
00591
00592 if(PingPongBufferFlag) {
00593 BytesToRead = (&SecondAppBuff[APP_BUFFER] - pTxBuff);
00594 } else {
00595 BytesToRead = (&FirstAppBuff[APP_BUFFER] - pTxBuff);
00596 }
00597 memory_barrier();
00598 }
00599
00600 BytesRead = RingBufferRead(pUsartBuffer, pTxBuff, BytesToRead);
00601 memory_sync();
00602 TxBytesLeft += BytesRead;
00603
00604 #ifdef USE_MD5_CHECK
00605 if(BytesRead>0)
00606 md5_append(&pms,pTxBuff,BytesRead);
00607 #endif
00608
00609
00610 if(AppBufferRollOver && (TxBytesLeft == APP_BUFFER)) {
00611 AppBufferRollOver = 0;
00612 TxBytesLeft = 0;
00613 BytesRead = 0;
00614 BytesToRead = MIN_FREE_BYTES;
00615 while(!UsartTx.dmaProgress);
00616 if(PingPongBufferFlag) {
00617 PingPongBufferFlag = 0;
00618 pTxBuff = &FirstAppBuff[0];
00619 } else {
00620 PingPongBufferFlag = 1;
00621 pTxBuff = &SecondAppBuff[0];
00622 }
00623 memory_sync();
00624 #ifdef FULL_DUPLEX
00625 USARTD_SendData(&Usartd);
00626 #endif
00627 }
00628
00629
00630 else {
00631 BytesToRead = MIN_FREE_BYTES;
00632 pTxBuff += BytesRead;
00633
00634 #ifdef FULL_DUPLEX
00635
00636
00637 if((GetDelayInTicks(TimeOutTimer, GetTicks()) == USART_TX_TIMEOUT)
00638 && TxBytesLeft) {
00639
00640 while(!UsartTx.dmaProgress);
00641 FlushTxBuffer(TxBytesLeft);
00642 TimeOutTimer = GetTicks();
00643 PingPongBufferFlag = 0;
00644 TxBytesLeft = 0;
00645 BytesRead = 0;
00646 BytesToRead = MIN_FREE_BYTES;
00647 pTxBuff = &FirstAppBuff[0];
00648 _UpdateTxConfig((uint32_t)&FirstAppBuff[0], APP_BUFFER);
00649 TRACE_INFO_WP(" TX Tiemout \n\r");
00650 }
00651 #endif
00652 }
00653 }
00654 }
00655