uart.rar_CSL_UART_IntExample_DSP UART_c5505

/* ============================================================================ * Copyright (c) Texas Instruments Inc 2002, 2003, 2004, 2005, 2008 * * Use of this software is controlled by the terms and conditions found in the * license agreement under which this software has been supplied. * ============================================================================ */ /** @file csl_uart_example.c * * @brief UART functional layer sample source file * * Path: \(CSLPATH)\example\uart */ /* ============================================================================ * Revision History * ================ * 16-Sep-2008 Created * ============================================================================ */ #include "csl_uart.h" #include "csl_uartAux.h" #include <csl_dma.h> #include <stdio.h> /*---------Global constants---------*/ /* String length to be received and transmitted */ #define WR_STR_LEN 80 #define RD_STR_LEN 10 #define CSL_TEST_FAILED (-1) /*---------Global data definition---------*/ /* UART setup structure */ CSL_UartSetup mySetup = { /* Input clock freq in MHz */ 60000000, /* baud rate */ 2400, /* word length of 8 */ CSL_UART_WORD8, /* To generate 1 stop bit */ 0, /* Disable the parity */ CSL_UART_DISABLE_PARITY, /*disable fifo */ // CSL_UART_FIFO_DISABLE, /*enable trigger 14 fifo */ CSL_UART_FIFO_DMA1_ENABLE_TRIG14, /* Loop Back enable */ CSL_UART_NO_LOOPBACK, /**No auto flow control*/ CSL_UART_NO_AFE , /** No RTS */ CSL_UART_NO_RTS , }; CSL_UartObj uartObj; CSL_DMA_Handle dmaWrHandle; CSL_DMA_Handle dmaRdHandle; CSL_DMA_Config dmaConfig; CSL_DMA_ChannelObj dmaWrChanObj; CSL_DMA_ChannelObj dmaRdChanObj; #define NO_OF_CHAR_TO_READ 30 #define NO_OF_CHAR_TO_WRITE 28 #define CSL_UART_WRBUF_SIZE (NO_OF_CHAR_TO_WRITE*4) #define CSL_UART_RDBUF_SIZE (NO_OF_CHAR_TO_READ*4) /**Dma write is happening in 32 bits,if use character array*/ Uint32 guartDmaWriteBuf[CSL_UART_WRBUF_SIZE] = {'\n','\n','\r','E','N','T','E','R',' ','T','E','X','T',' ','O','F',' ','L','E','N','G','T','H',' ','3','0','\n','\r'}; char guartDmaReadBuf[CSL_UART_RDBUF_SIZE]; /** * \brief Configures Dma * * \param chanNum - Dma channel number * * \return Dma handle */ CSL_DMA_Handle CSL_configDmaForUart(CSL_DMA_ChannelObj *dmaChanObj, CSL_DMAChanNum chanNum) { CSL_DMA_Handle dmaHandle; CSL_Status status; dmaHandle = NULL; /* Initialize Dma */ status = DMA_init(); if (status != CSL_SOK) { printf("DMA_init Failed!\n"); } /* Open A Dma channel */ dmaHandle = DMA_open(chanNum, dmaChanObj, &status); //dmaHandle = DMA_open(chanNum, &status); if(dmaHandle == NULL) { printf("DMA_open Failed!\n"); } /* Configure a Dma channel */ status = DMA_config(dmaHandle, &dmaConfig); if(status != CSL_SOK) { printf("DMA_config Failed!\n"); dmaHandle = NULL; } return(dmaHandle); } int main() { CSL_UartHandle hUart; CSL_Status status; int looper = 0; /* Loop counter and error flag */ status = UART_init(&uartObj,CSL_UART_INST_0,UART_POLLED); if(CSL_SOK != status) { printf("UART_init failed error code %d\n",status); return status; } /** Handle created*/ hUart = (CSL_UartHandle)(&uartObj); /* Configure DMA channel for nand write */ dmaConfig.autoMode = CSL_DMA_AUTORELOAD_DISABLE; dmaConfig.burstLen = CSL_DMA_TXBURST_1WORD; dmaConfig.trigger = CSL_DMA_EVENT_TRIGGER; dmaConfig.dmaEvt = CSL_DMA_EVT_UART_TX; dmaConfig.dmaInt = CSL_DMA_INTERRUPT_DISABLE; dmaConfig.chanDir = CSL_DMA_WRITE; dmaConfig.trfType = CSL_DMA_TRANSFER_IO_MEMORY; dmaConfig.dataLen = CSL_UART_WRBUF_SIZE; dmaConfig.srcAddr = (Uint32)guartDmaWriteBuf; dmaConfig.destAddr = (Uint32)&(hUart->uartRegs->THR); dmaWrHandle = CSL_configDmaForUart(&dmaWrChanObj, CSL_DMA_CHAN4); if(dmaWrHandle == NULL) { printf("DMA Config for Uart Write Failed!\n!"); return(CSL_TEST_FAILED); } /* Configure UART registers using setup structure */ status = UART_setup(hUart,&mySetup); if(CSL_SOK != status) { printf("UART_setup failed error code %d\n",status); return status; } /* Start Dma transfer */ status = DMA_start(dmaWrHandle); if(status != CSL_SOK) { printf("Uart Dma Write Failed!!\n"); return(status); } /* Check transfer complete status */ while(DMA_getStatus(dmaWrHandle)); /* Configure DMA channel for nand read */ dmaConfig.autoMode = CSL_DMA_AUTORELOAD_DISABLE; dmaConfig.burstLen = CSL_DMA_TXBURST_1WORD; dmaConfig.trigger = CSL_DMA_EVENT_TRIGGER; dmaConfig.dmaEvt = CSL_DMA_EVT_UART_RX; dmaConfig.dmaInt = CSL_DMA_INTERRUPT_DISABLE; dmaConfig.chanDir = CSL_DMA_READ; dmaConfig.trfType = CSL_DMA_TRANSFER_IO_MEMORY; dmaConfig.dataLen = CSL_UART_RDBUF_SIZE; dmaConfig.srcAddr = (Uint32)&(hUart->uartRegs->THR); dmaConfig.destAddr = (Uint32)guartDmaReadBuf; dmaRdHandle = CSL_configDmaForUart(&dmaRdChanObj,CSL_DMA_CHAN4); if(dmaRdHandle == NULL) { printf("DMA Config for DMA Read Failed!\n!"); return(CSL_TEST_FAILED); } /* Start Dma transfer */ status = DMA_start(dmaRdHandle); if(status != CSL_SOK) { printf("Uart Dma Write Failed!!\n"); return(status); } /* Check transfer complete status */ while(DMA_getStatus(dmaRdHandle)); for(looper = 1; looper < (NO_OF_CHAR_TO_READ*2); looper+=2) printf("%c",guartDmaReadBuf[looper]); printf("\n"); return 0; }