TMS320VC5502 MCBSP

/* * Copyright (C) 2003 Texas Instruments Incorporated * All Rights Reserved */ /* *---------main_mcbsp2.c--------- * * This Example configures the serial port for digital loopback mode * to transfer 32-bit of data. * We then use the ISR's to write/read from the port. In loopback mode, we * should read back the same value as written, which is checked for in a loop */ #include <stdio.h> #include <csl.h> #include <csl_mcbsp.h> #include <csl_irq.h> //---------Global constants--------- #define SIZE 1024 //---------Global data definition--------- //Handle for McBSP static volatile MCBSP_Handle hMcbsp; //Buffers to store data static volatile Uint32 writeBuff[SIZE], readBuff[SIZE]; //Event id's Uint16 rcvEventID, xmtEventID; Uint16 cnt=0; //Transfer Complete code for McBSP static volatile int transferComplete=0; /* create a MCBSP config structure for digital loopback mode */ static MCBSP_Config ConfigLoopBack32= { MCBSP_SPCR1_RMK( MCBSP_SPCR1_DLB_ON, /* DLB = 1 */ MCBSP_SPCR1_RJUST_RZF, /* RJUST = 0 */ MCBSP_SPCR1_CLKSTP_DISABLE, /* CLKSTP = 0 */ MCBSP_SPCR1_DXENA_NA, /* DXENA = 0 */ MCBSP_SPCR1_ABIS_DISABLE, /* ABIS = 0 */ MCBSP_SPCR1_RINTM_RRDY, /* RINTM = 0 */ 0, /* RSYNCER = 0 */ MCBSP_SPCR1_RRST_DISABLE /* RRST = 0 */ ), MCBSP_SPCR2_RMK( MCBSP_SPCR2_FREE_NO, /* FREE = 0 */ MCBSP_SPCR2_SOFT_NO, /* SOFT = 0 */ MCBSP_SPCR2_FRST_RESET, /* FRST = 0 */ MCBSP_SPCR2_GRST_RESET, /* GRST = 0 */ MCBSP_SPCR2_XINTM_XRDY, /* XINTM = 0 */ 0, /* XSYNCER = N/A */ MCBSP_SPCR2_XRST_DISABLE /* XRST = 0 */ ), MCBSP_RCR1_RMK( MCBSP_RCR1_RFRLEN1_OF(0), /* RFRLEN1 = 0 */ MCBSP_RCR1_RWDLEN1_32BIT /* RWDLEN1 = 5 */ ), MCBSP_RCR2_RMK( MCBSP_RCR2_RPHASE_SINGLE, /* RPHASE = 0 */ MCBSP_RCR2_RFRLEN2_OF(0), /* RFRLEN2 = 0 */ MCBSP_RCR2_RWDLEN2_8BIT, /* RWDLEN2 = 0 */ MCBSP_RCR2_RCOMPAND_MSB, /* RCOMPAND = 0 */ MCBSP_RCR2_RFIG_YES, /* RFIG = 0 */ MCBSP_RCR2_RDATDLY_2BIT /* RDATDLY = 0 */ ), MCBSP_XCR1_RMK( MCBSP_XCR1_XFRLEN1_OF(0), /* XFRLEN1 = 0 */ MCBSP_XCR1_XWDLEN1_32BIT /* XWDLEN1 = 5 */ ), MCBSP_XCR2_RMK( MCBSP_XCR2_XPHASE_SINGLE, /* XPHASE = 0 */ MCBSP_XCR2_XFRLEN2_OF(0), /* XFRLEN2 = 0 */ MCBSP_XCR2_XWDLEN2_8BIT, /* XWDLEN2 = 0 */ MCBSP_XCR2_XCOMPAND_MSB, /* XCOMPAND = 0 */ MCBSP_XCR2_XFIG_YES, /* XFIG = 0 */ MCBSP_XCR2_XDATDLY_2BIT /* XDATDLY = 0 */ ), MCBSP_SRGR1_RMK( MCBSP_SRGR1_FWID_OF(1), /* FWID = 1 */ MCBSP_SRGR1_CLKGDV_OF(1) /* CLKGDV = 1 */ ), MCBSP_SRGR2_RMK( MCBSP_SRGR2_GSYNC_FREE, /* FREE = 0 */ MCBSP_SRGR2_CLKSP_RISING, /* CLKSP = 0 */ MCBSP_SRGR2_CLKSM_INTERNAL, /* CLKSM = 1 */ MCBSP_SRGR2_FSGM_DXR2XSR, /* FSGM = 0 */ MCBSP_SRGR2_FPER_OF(15) /* FPER = 0 */ ), MCBSP_MCR1_DEFAULT, MCBSP_MCR2_DEFAULT, MCBSP_PCR_RMK( MCBSP_PCR_XIOEN_SP, /* XIOEN = 0 */ MCBSP_PCR_RIOEN_SP, /* RIOEN = 0 */ MCBSP_PCR_FSXM_INTERNAL, /* FSXM = 1 */ MCBSP_PCR_FSRM_EXTERNAL, /* FSRM = 0 */ MCBSP_PCR_CLKXM_OUTPUT, /* CLKXM = 1 */ MCBSP_PCR_CLKRM_INPUT, /* CLKRM = 0 */ MCBSP_PCR_SCLKME_NO, /* SCLKME = 0 */ 0, /* DXSTAT = N/A */ MCBSP_PCR_FSXP_ACTIVEHIGH, /* FSXP = 0 */ MCBSP_PCR_FSRP_ACTIVEHIGH, /* FSRP = 0 */ MCBSP_PCR_CLKXP_RISING, /* CLKXP = 0 */ MCBSP_PCR_CLKRP_FALLING /* CLKRP = 0 */ ), MCBSP_RCERA_DEFAULT, MCBSP_RCERB_DEFAULT, MCBSP_RCERC_DEFAULT, MCBSP_RCERD_DEFAULT, MCBSP_RCERE_DEFAULT, MCBSP_RCERF_DEFAULT, MCBSP_RCERG_DEFAULT, MCBSP_RCERH_DEFAULT, MCBSP_XCERA_DEFAULT, MCBSP_XCERB_DEFAULT, MCBSP_XCERC_DEFAULT, MCBSP_XCERD_DEFAULT, MCBSP_XCERE_DEFAULT, MCBSP_XCERF_DEFAULT, MCBSP_XCERG_DEFAULT, MCBSP_XCERH_DEFAULT }; //---------Function prototypes--------- //ISR's to send and receive data through McBSP interrupt void writeISR(void); interrupt void readISR(void); /* Reference the start of the interrupt vector table */ /* This symbol is defined in file vectors.s55 */ extern void VECSTART(void); //---------main routine--------- void main() { volatile Uint32 x,y; int success = 1,i,gie; // Fill the buffers with some patterns for (i = 0; i <= SIZE - 1; i++) { //Set up src buffer writeBuff[i] = ((Uint32)i << 16) + i; //Corrupt dst buffer readBuff[i] = 0xdeaddead; } //Disable interrupt gie=IRQ_globalDisable(); //Open McBSP channel hMcbsp = MCBSP_open(MCBSP_PORT0, MCBSP_OPEN_RESET); /* Get EventId's associated with MCBSP Port 0 receive and transmit */ rcvEventID = MCBSP_getRcvEventId(hMcbsp); xmtEventID = MCBSP_getXmtEventId(hMcbsp); IRQ_setVecs((Uint32)(&VECSTART)); /* Clear any pending receive or transmit interrupts */ IRQ_clear(rcvEventID); IRQ_plug(rcvEventID, &readISR); IRQ_clear(xmtEventID); IRQ_plug(xmtEventID, &writeISR); /* Write values from configuration structure to MCBSP control regs */ MCBSP_config(hMcbsp, &ConfigLoopBack32); /* Enable the MCBSP receive and transmit interrupts */ IRQ_enable(rcvEventID); IRQ_enable(xmtEventID); /* Start Sample Rate Generator and Frame Sync */ MCBSP_start(hMcbsp, MCBSP_SRGR_START | MCBSP_SRGR_FRAMESYNC, 0x300 ); /* Enable MCBSP transmit and receive */ MCBSP_start(hMcbsp, MCBSP_RCV_START | MCBSP_XMIT_START, 0 ); IRQ_globalEnable(); while(!transferComplete); for(i=0;i<SIZE;i++) { if(readBuff[i] != writeBuff[i]) { success=0; break; } } IRQ_globalRestore(gie); MCBSP_close(hMcbsp); if(success) printf("TEST PASSED\n"); else printf("TEST FAILED\n"); } // ISR to transmit data thro McBSP interrupt void writeISR(void) { IRQ_disable(xmtEventID); MCBSP_write32(hMcbsp,writeBuff[cnt]); } // ISR to receive data interrupt void readISR(void) { readBuff[cnt] = MCBSP_read32(hMcbsp); cnt++; if (cnt == SIZE) { IRQ_disable(rcvEventID); IRQ_disable(xmtEventID); MCBSP_reset(hMcbsp); transferComplete=1; } else { IRQ_enable(xmtEventID); } }