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el_lin.c
- Committer:
- Kovalev_D
- Date:
- 2016-02-10
- Revision:
- 47:d902ef6f7564
- Parent:
- 30:17c84ed091b3
- Child:
- 91:a2bb81eaa183
File content as of revision 47:d902ef6f7564:
/**--------------File Info--------------------------------------------------------------------------------- ** File name: el_lin.c ** Last modified Date: 2011-08-22 ** Last Version: V1.00 **-------------------------------------------------------------------------------------------------------- ** Created by: Electrooptica Incor. ** Created date: 2011-08-22 ** Version: V1.00 **-------------------------------------------------------------------------------------------------------- *********************************************************************************************************/ #include "Global.h" #define UART1TEST #define UART1REC /* struct { uint32_t rcv_num_byt; uint32_t rcv_num_byt_old; uint32_t rcv_Rdy; char rcv_copy[64]; char rcv_buf[64]; int32_t rx_buf_copy; int32_t rcv_byt_copy; }RECIEVER; struct { uint32_t trm_num_byt; uint32_t trm_rate; uint32_t trm_cycl; uint32_t num_of_par; char trm_buf[64]; void* addr_param[16]; uint32_t size_param[16]; uint32_t trm_ena; }TRANSMITTER; */ uint32_t rcv_num_byt; uint32_t rcv_num_byt_old; uint32_t rcv_Rdy; char rcv_copy[64]; char rcv_buf[64]; int32_t rx_buf_copy; int32_t rcv_byt_copy; uint32_t trm_num_byt; uint32_t trm_rate; uint32_t num_of_par; char trm_buf[64]; void* addr_param[16]; uint32_t size_param[16]; uint32_t trm_ena; uint32_t line_err; uint32_t line_sts; uint32_t EnablLength = 12; uint32_t LLI0_TypeDef[4]; uint32_t LLI1_TypeDef[4]; uint32_t EnablTx = 0x80; uint32_t EnablDMA = 0; /****************************************************************************** ** Function name: DMA_IRQHandler ** ** Descriptions: DMA interrupt handler ** ** parameters: None ** Returned value: None ** ******************************************************************************/ int check_lcc(void) //e. CRC checking //r.проверка контрольной суммы { int iCRC_calc, CRC_calc = 0, CRC_real; for (iCRC_calc = 1; iCRC_calc < (rcv_num_byt-2); iCRC_calc++) CRC_calc += rcv_buf[iCRC_calc]; CRC_real = (rcv_buf[rcv_num_byt-2] << 8) | rcv_buf[rcv_num_byt-1]; return (CRC_real - CRC_calc); } void PacketSafing(void) { /* int j; static char rcv_buf_copy[16]; for (j=2; j<rcv_num_byt; j++) { if (rcv_buf[j] == 0xCC); rcv_buf_copy[0] = 0xCC; // if ((rcv_buf[j] < 3) || (rcv_buf[j] == 0x1F)) } */ } /****************************************************************************** ** Function name: Line_1_Rcv ** ** Descriptions: receive process preparation ** ** parameters: None ** Returned value: None ** ******************************************************************************/ void Line_1_Rcv(void) { static int ToWaitEnd, ErrReg ; while ((LPC_UART1->LSR & RecievBufEmpty) != 0) //e. reciever contain some information rcv_buf[rcv_num_byt++] = LPC_UART1->RBR;//чтение информации из буфера. if (( ToWaitEnd > 25000)) { //e. end part of packet is absent //r. не дождались конца пакета do rcv_buf[--rcv_num_byt] = 0; while(rcv_num_byt); rcv_num_byt_old = rcv_num_byt; #if defined UART1REC LPC_UART1->FCR |= RX_FIFO_Reset; #else LPC_UART0->FCR |= RX_FIFO_Reset; #endif // L1_Rc_err (TIMEOUT_ERR); ToWaitEnd = 0; return; } if (rcv_num_byt_old == rcv_num_byt) { //e. we have not received any new bytes if (ToWaitEnd) ToWaitEnd++; return; } rcv_num_byt_old = rcv_num_byt; if ((rcv_num_byt < 6) || ((rcv_num_byt & 0x0001) == 1)) { ToWaitEnd++; return; } if ((!ToWaitEnd) && (rcv_num_byt > 1)) //e. the header of packet has not recieved //r. ожидаем начало пакета if ((rcv_buf[0] != 0xCC) || (( rcv_buf[1] > 2) && ( rcv_buf[1] != 0x1F))) { // L1_Rc_err (HEADER_ERR); ErrReg |= 5; ToWaitEnd++; return; } // if (ErrReg != 0) //e. trying of recovering of packet //r. спасение следующего пакета // PacketSafing(); if (rcv_num_byt == 6) { if ((rcv_buf[2] == 0x0A) || (rcv_buf[2] == 0xE0) || (rcv_buf[2] == 0xE4) || (rcv_buf[2] == 0xE6) || (rcv_buf[2] == 0xE8)) { //e. packet length is not valid, so we have the error //r. ошибка размера пакета ToWaitEnd++; return; } } else if (rcv_num_byt == 8) { if ((rcv_buf[2] == 0xE0) || (rcv_buf[2] == 0xE4)) { ToWaitEnd++; return; } } if (check_lcc() != 0) { //e. checksum is bad //r.контрольные суммы не равны return; } else { //e. cheksum is not bad //r.контрольные суммы равны rcv_Rdy = 1; } ToWaitEnd = 0; return; } /* void L1_Rc_err (int Error) //e. error fixing and reciever restart //r. модуль фиксации ошибки и перезапуска приемника { int temp; line_sts |= Error; temp = Copy_SRgR & (~Rcv_Rdy); io_space_write(Sys_RgR, temp); temp |= Rcv_Rdy; asm("nop;"); io_space_write(Sys_RgR, temp); return; } */ /****************************************************************************** ** Function name: transm_DAT ** ** Descriptions: transmit process preparation ** ** parameters: None ** Returned value: None ** ******************************************************************************/ void transm_DAT(void) { uint32_t param, param_byte, CRC; int32_t *trans_param; if ((LPC_UART1->LSR & TRANS_SHIFT_BUF_EMPTY)) //r. передающий буфер пуст if (!( LPC_GPDMACH1->CConfig & (1<<17))) LPC_GPIO2->FIOCLR |= 8; //switch off UART1 driver if (trm_ena == 0) { // LPC_GPIO1->FIOCLR = (0x01<<30); //r.передача требуется? return; //r. если нет, возврат } if (!(LPC_UART1->LSR & TRANS_SHIFT_BUF_EMPTY)) //r. передающий буфер пуст return; if ( LPC_GPDMACH1->CConfig & (1<<17)) //r. если канал передачи занят, ждать return; //#if defined UART1TEST // if (LPC_SC->DMAREQSEL == 0x8) //e. DMA request from UART // LPC_GPIO2->FIOSET |= (1<<3); //e. set enable UART bit //#endif trm_ena = 0; //r. сбросить флаг разрешения передачи trm_num_byt = 2; trm_buf[0] = 0x00dd; //r. заголовок пакета trm_buf[1] = Device_blk.Str.My_Addres; //r. адрес прибора CRC = trm_buf[1]; //r.инициализация счетчика контрольной суммы for ( param = 0; param < num_of_par; param++) { //r.цикл формирования блока данных пакета trans_param = (int32_t *)addr_param[param]; //r. чтение адреса одного из выдаваемых в пакете параметров for (param_byte = 0; param_byte < size_param[param]; param_byte++) { if ( (param_byte & 0x0001) == 0 ) //r. считываем старший байт trm_buf[trm_num_byt] = (*trans_param >> (8/**(size_param[param]-param_byte-1)*/)) & 0x00ff; //r.размещение передаваемого параметра в пакете else { trm_buf[trm_num_byt] = *trans_param & 0x00ff; trans_param ++; //r.переходим к следующей ячейке памяти } CRC += trm_buf[trm_num_byt]; //r. вычисление текущей контрольной суммы trm_num_byt++; //r. количество бит, отправленных в пакет } } trm_buf[trm_num_byt] = CRC >> 8; //r. запись контрольной суммы в пакет trm_buf[trm_num_byt+1] = CRC & 0x00ff; trm_num_byt += 2; LPC_GPDMACH1->CSrcAddr = (uint32_t)&trm_buf; LPC_GPDMACH1->CControl &= ~0xFFF; //e. reset of numer bytes for transmitting LPC_GPDMACH2->CControl &= ~0xFFF; //e. reset of numer bytes for transmitting LPC_GPDMACH1->CLLI = 0; //e. linked list is empty if (trm_num_byt > 16) { //e. a packet is too long for FIFO LPC_GPDMACH1->CControl |= 16; //e. set length of first packet part LPC_GPDMACH1->CLLI = (uint32_t)&LLI0_TypeDef; //e. initialize chain for other parts transmitting } else LPC_GPDMACH1->CControl |= trm_num_byt; LPC_GPDMACH2->CControl |= 1; //e. set 1 transfert for enable signal #if defined UART1TEST LPC_UART1->TER = 0; //e. disable data output to UART1 #endif if (Device_Mode < 4) { //e. work with internal latch LPC_TIM0->TCR = 1; //e. start timer //-------------------debug----------------------------------------- LPC_GPIO2->FIOSET |= 8; //turn on RS-422 driver //-------------------debug----------------------------------------- LPC_GPDMACH1->CConfig |= DMAChannelEn; //e. DMA for UART transmition //LPC_GPIO1->FIOSET = (0x1<<30); } LPC_GPDMACH2->CConfig |= DMAChannelEn; //e. DMA for enable signal return; } /****************************************************************************** ** Function name: DMA_Init ** ** Descriptions: ** ** parameters: ** Returned value: ** ******************************************************************************/ void DMA_Init( void ) { /* Enable CLOCK into GPDMA controller */ LPC_SC->PCONP |= GPDMA_POWER_ON; /* Select primary function(UART0/1/2/3) in DMA channels, secondary is timer 0/1/2/3. */ #if defined UART1TEST LPC_SC->DMAREQSEL = 3; #endif //LPC_GPDMA->Sync = (0x1<<DMA_UART0_RX)|(0x1<<DMA_UART1_TX); //synchronization logic is enabled by default LPC_GPDMA->Config = DMA_ControllerEn | DMA_AHB_Little; while ( !(LPC_GPDMA->Config & DMA_ControllerEn) ); //wait until DMA_Controller switched on NVIC_DisableIRQ(DMA_IRQn); return; } /****************************************************************************** ** Function name: UARTInit ** ** Descriptions: Initialisation of UART on 38400 baud ** ** parameters: None ** Returned value: None ** ******************************************************************************/ void UARTInit(void) { uint32_t Fdiv; uint32_t pclk; #if !defined UART1TEST uint32_t baudrate = 38400; #else uint32_t baudrate = 38400; #endif LPC_SC->PCONP |= (1<<3); LPC_PINCON->PINSEL0 |= 0x00000050; pclk = SystemCoreClock/4; LPC_UART0->LCR = word_length_8 |one_stop_bit |no_parity |back_trans_dis |DLAB_access; Fdiv = (pclk / 16) / baudrate; LPC_UART0->DLM = Fdiv / 256; LPC_UART0->DLL = Fdiv % 256; LPC_UART0->LCR &= ~DLAB_access; LPC_UART0->FCR = TX_FIFO_Reset |RX_FIFO_Reset |FIFOs_En |RX_TrigLvl_14; //0x06; LPC_UART0->IER = 0;//RBR_IntEnabl; LPC_UART0->FCR |= 0x08; //e. DMA mode select //+++++++++++++++++++++++enable signal initialization++++++++++++++++++++++++++ LPC_PINCON->PINSEL1 &= ~0x0000C000; //e. select P0.23 as general purpose LPC_GPIO0->FIODIR |= 0x00800000; //e. P0.23 is output // LPC_GPIO0->FIOMASK |= 0x007F0000; //e. P0.16..P0.22 is not changed by FIOSET writing LPC_GPIO0->FIOCLR |= 0x00800000; // e. clear P0.23 return; } void UART1_Init(void) { uint32_t Fdiv; uint32_t pclk; #if !defined UART1TEST uint32_t baudrate = 256000; #else uint32_t baudrate = 38400; #endif LPC_SC->PCONP |= (1<<4); //switch on UART1 // LPC_PINCON->PINSEL4 |= (2<<0)|(2<<2)|(2<<10)|(2<<14); //P2.0, P2.1, P2.5, P2.7 LPC_PINCON->PINSEL4 |= (2<<0)|(2<<2); //P2.0, P2.1, P2.5, pclk = SystemCoreClock/4; LPC_UART1->LCR = word_length_8 |one_stop_bit |no_parity |back_trans_dis |DLAB_access; Fdiv = (pclk / 16) / baudrate; LPC_UART1->DLM = Fdiv / 256; LPC_UART1->DLL = Fdiv % 256; LPC_UART1->LCR &= ~DLAB_access; LPC_UART1->FCR = TX_FIFO_Reset |RX_FIFO_Reset |FIFOs_En |RX_TrigLvl_14; //0x06; LPC_UART1->RS485CTRL = (1<<5); //(1<<4); LPC_UART1->IER = 0;//RBR_IntEnabl; LPC_UART1->FCR |= 0x08; //e. DMA mode select return; } //----------------------temp---------------------------- /*int UART0_SendByte (int ucData) { // while (!(LPC_UART1->LSR & 0x20)); return (LPC_UART0->THR = ucData); }*/ //----------------------temp---------------------------- int UART1_SendByte (int ucData) { // while (!(LPC_UART1->LSR & 0x20)); return (LPC_UART1->THR = ucData); } /****************************************************************************** ** Function name: UART_SwitchSpeed ** ** Descriptions: Change UART speed ** ** parameters: Demanded speed ** Returned value: None ** ******************************************************************************/ void UART_SwitchSpeed(unsigned Speed) { uint32_t Fdiv; uint32_t pclk; pclk = SystemCoreClock/4; #if defined UART1REC LPC_UART1->LCR |= DLAB_access; #else LPC_UART0->LCR |= DLAB_access; #endif switch (Speed) { case Sp38400: Fdiv = (pclk / 16) / 38400; EnablLength = 3240; break; case Sp115200: Fdiv = (pclk / 16) /115200; EnablLength = 1090; break; case Sp460800: Fdiv = (pclk / 16) / 460800; break; case Sp921600: Fdiv = (pclk / 16) / 921600; EnablLength = 140; break; } #if defined UART1REC LPC_UART1->DLM = Fdiv / 256; LPC_UART1->DLL = Fdiv % 256; LPC_UART1->LCR &= ~DLAB_access; #else LPC_UART0->DLM = Fdiv / 256; LPC_UART0->DLL = Fdiv % 256; LPC_UART0->LCR &= ~DLAB_access; #endif } /****************************************************************************** ** Function name: UART_DMA_Init ** ** Descriptions: Initialisation of DMA channel for UART transmitter ** ** parameters: None ** Returned value: None ** ******************************************************************************/ void UART_DMA_Init() { //+++++++++++++++++config channel for UART0+++++++++++++++++++++++++++++++++++++++++++++++ LPC_GPDMACH1->CConfig &= ~DMAChannelEn; LPC_GPDMA->IntTCClear = DMA1_IntTCClear; LPC_GPDMA->IntErrClr = DMA1_IntErrClear; LPC_GPDMACH1->CSrcAddr = (uint32_t)&trm_buf; LPC_GPDMACH1->CDestAddr = UART1_DMA_TX_DST; LPC_GPDMACH1->CControl = SrcBSize_1 | DstBSize_1 | SrcWidth_8b | DstWidth_8b | SrcInc | DstFixed | TCIntDisabl; #if defined UART1TEST LPC_GPDMACH1->CConfig |= MaskTCInt | MaskErrInt | DMA_MEMORY | DstDMA_UART1_TX |(M2P << 11); #else g LPC_GPDMACH1->CConfig |= MaskTCInt | MaskErrInt | DMA_MEMORY | DstDMA_UART0_TX |(M2P << 11); #endif EnablDMA = (LPC_GPDMACH1->CConfig)|DMAChannelEn; //save register content for DMA starting in multidrop mode //**********for Rate mode output***************************** #if defined UART1TEST LLI1_TypeDef[0] = (uint32_t)&trm_buf[32]; LLI1_TypeDef[1] = UART1_DMA_TX_DST; LLI1_TypeDef[2] = 0; LLI1_TypeDef[3] = (12 & 0x0FFF) | SrcBSize_1 | DstBSize_1 | SrcWidth_8b | DstWidth_8b | SrcInc | DstFixed | TCIntDisabl; LLI0_TypeDef[0] = (uint32_t)&trm_buf[16]; LLI0_TypeDef[1] = UART1_DMA_TX_DST; LLI0_TypeDef[2] = (uint32_t)&LLI1_TypeDef; LLI0_TypeDef[3] = (16 & 0x0FFF) | SrcBSize_1 | DstBSize_1 | SrcWidth_8b | DstWidth_8b | SrcInc | DstFixed | TCIntDisabl; #else LLI1_TypeDef[0] = (uint32_t)&trm_buf[32]; LLI1_TypeDef[1] = UART0_DMA_TX_DST; LLI1_TypeDef[2] = 0; LLI1_TypeDef[3] = (12 & 0x0FFF) | SrcBSize_1 | DstBSize_1 | SrcWidth_8b | DstWidth_8b | SrcInc | DstFixed | TCIntDisabl; LLI0_TypeDef[0] = (uint32_t)&trm_buf[16]; LLI0_TypeDef[1] = UART0_DMA_TX_DST; LLI0_TypeDef[2] = (uint32_t)&LLI1_TypeDef; LLI0_TypeDef[3] = (16 & 0x0FFF)|SrcBSize_1 |DstBSize_1 |SrcWidth_8b |DstWidth_8b|SrcInc |DstFixed |TCIntDisabl; #endif //++++++++++++++++++++++++++config channel for transmit enable signal+++++++++++++++++++ LPC_GPDMACH2->CConfig &= ~DMAChannelEn; LPC_GPDMA->IntTCClear = DMA2_IntTCClear; LPC_GPDMA->IntErrClr = DMA2_IntErrClear; LPC_GPDMACH2->CSrcAddr = (uint32_t)&EnablTx; //e. content of TX UART1 enable register LPC_GPDMACH2->CDestAddr = 0x40010030; //e. address of TX UART1 enable register (U1TER) LPC_GPDMACH2->CControl = SrcBSize_4 |DstBSize_4 |SrcWidth_8b |DstWidth_8b|SrcFixed |DstFixed |TCIntEnabl; LPC_GPDMACH2->CConfig |= MaskTCInt |MaskErrInt |SrcDMA_UART0_RX |DstDMA_UART0_RX|(M2P << 11); LPC_GPDMACH2->CLLI = 0; //e. linked list is empty //++++++++++++++++++++++++++config channel for DMA1 enable signal+++++++++++++++++++ #if defined UART1TEST LPC_GPDMACH4->CConfig &= ~DMAChannelEn; LPC_GPDMA->IntTCClear = DMA4_IntTCClear; LPC_GPDMA->IntErrClr = DMA4_IntErrClear; LPC_GPDMACH4->CSrcAddr = (uint32_t)&EnablDMA; //e. content of TX UART1 enable register LPC_GPDMACH4->CDestAddr = 0x50004130; //e. address of DMA1CConfig register LPC_GPDMACH4->CControl = SrcBSize_4 |DstBSize_4 |SrcWidth_8b |DstWidth_8b|SrcFixed |DstFixed |TCIntEnabl; LPC_GPDMACH4->CConfig |= MaskTCInt |MaskErrInt |SrcDMA_UART0_TX |DstDMA_UART0_TX|(M2P << 11); LPC_GPDMACH4->CLLI = 0; //e. linked list is empty #endif } /****************************************************************************** ** End Of File ******************************************************************************/