实现TMS320VC5510对指纹芯片FPC1011C读写程序

/**************************************************************************** * * * TEXAS INSTRUMENTS PROPRIETARY INFORMATION * * (c) Copyright, Texas Instruments Incorporated, 2003. * All Rights Reserved. * * Property of Texas Instruments Incorporated. Restricted Rights - * Use, duplication, or disclosure is subject to restrictions set * forth in TI's program license agreement and associated documentation. * ***************************************************************************** ***************************************************************************** * * NAME: spi.c * * * DESCRIPTION: functions to read complete image from FPC1010 sensor. * * * CREATED: 05/20/2002 * MODIFIED: 06/13/2003 * * ****************************************************************************/ #define DRR20_ADDR 0x2800 #define DXR10_ADDR (DRR20_ADDR+3) #define DXR10 *(ioport volatile unsigned int *)DXR10_ADDR #define DRR10_ADDR (DRR20_ADDR+1) #define DRR10 *(ioport volatile unsigned int *)DRR10_ADDR #define SPCR20_ADDR (DRR20_ADDR+4) #define SPCR20 *(ioport volatile unsigned int *)SPCR20_ADDR #define SPCR10_ADDR (DRR20_ADDR+5) #define SPCR10 *(ioport volatile unsigned int *)SPCR10_ADDR #define RCR20_ADDR (DRR20_ADDR+6) #define RCR20 *(ioport volatile unsigned int *)RCR10_ADDR #define RCR10_ADDR (DRR20_ADDR+7) #define RCR10 *(ioport volatile unsigned int *)RCR20_ADDR #define XCR20_ADDR (DRR20_ADDR+8) #define XCR20 *(ioport volatile unsigned int *)XCR20_ADDR #define XCR10_ADDR (DRR20_ADDR+9) #define XCR10 *(ioport volatile unsigned int *)XCR10_ADDR #define SRGR20_ADDR (DRR20_ADDR+10) #define SRGR20 *(ioport volatile unsigned int *)SRGR20_ADDR #define SRGR10_ADDR (DRR20_ADDR+11) #define SRGR10 *(ioport volatile unsigned int *)SRGR10_ADDR #define PCR0_ADDR (DRR20_ADDR+18) #define PCR0 *(ioport volatile unsigned int *)PCR0_ADDR #include <csl.h> #include <csl_mcbsp.h> #include "spi.h" MCBSP_Handle hMcbsp0; /* * Function name : SPI_txReady * Arguments : none * Return value : none * Exceptions : * Description : waits till master is ready for transmission. */ void SPI_txReady(void) { unsigned char t; do{ //0x2804 Port Address:McBSP 0 Serial Port Control Register 2(SPCR2_0) t = *(unsigned volatile ioport *)0x2804; } while (!( t & 0x02)); } /* * Function name : SPI_rxReady * Arguments : none * Return value : none * Exceptions : * Description : waits till the slave is transmits the data ti master. */ void SPI_rxReady(void) { unsigned char temp; do{ ////0x2805 Port Address:McBSP 0 Serial Port Control Register 1(SPCR1_0) temp = *(unsigned volatile ioport *)0x2805; } while (!( temp & 0x02)); } /* * Function name : SPI_init * Arguments : pcrValue , Frequency , xcr2 value * Return value : if succes then returns 0 else error * Exceptions : * Description : initializes the McBSP 0 for SPI communication. */ void SPI_init(unsigned char pcrValue,unsigned char frequency,unsigned char xcr2Value) { unsigned int temp = 0; SPCR20 = 0x0380; /* FRST = 1 - Enable Frame Sync Logic Free = 1 - Clock Continues to RUN in Breakpoint Soft = 1 - Clock Continues to RUN in Breakpoint */ SPCR10 = 0x1800; /* CLKStop = 3 -Clock Stop Mode with 1/2 cycle delay */ RCR20 = 0x0040; /* // 16-bit Word Length. // */ RCR10 = 0x0001; /* 1-bit Data Delay */ XCR10 = 0x0040; // 16 bit tx; XCR20 = 0x0041; // 1 bit delay provided ; 16bit rx; SRGR20 = 0x2000; // enabled clksm=1 /*PCR 10*/ SRGR10 = 0x00C7; //Divide by 47;; 48/47+1 = 1Mhz PCR0 = 0x0F7D; /* Enable GRST*/ temp = SPCR20; /* GRST = 1 Sample Rate Generator enabled */ temp |= 0x40; SPCR20 = temp; /* delay */ for( temp = 0; temp < 0xff; temp++ ); temp = SPCR20; temp |= 0x01; /* XRST = 1 Enable transmitter by taking it out of reset */ SPCR20 = temp; /* delay */ for( temp = 0; temp < 0xff; temp++ ); /* enable the receiver and taking out from the Reset condition */ temp = SPCR10; temp |= 0x01; /* RRST = 1 Enable receiver by taking it out of reset */ SPCR10 = temp; /* delay */ for( temp = 0; temp < 0x1ff; temp++ ); } /* * Function name : SPI_txChar * Arguments : character to be written to the slave * Return value : none * Exceptions : * Description : write the argument character to slave. */ void SPI_txChar(unsigned char character) { unsigned char t; SPI_txReady(); /* write the command */ MCBSP_RSETH(hMcbsp0, DXR1,character); /* dummy read always needed */ SPI_rxReady(); t = MCBSP_RGETH(hMcbsp0, DRR1); } /* * Function name : SPI_rxChar * Arguments : none * Return value : character * Exceptions : * Description : write the character from to slave. */ unsigned char SPI_rxChar(void) { unsigned char character; SPI_txReady(); /* write dummy byte to receive the image byte */ MCBSP_RSETH(hMcbsp0, DXR1,0xFF); SPI_rxReady(); character = MCBSP_RGETH(hMcbsp0,DRR1); return character; } /* * Function name : SPI_close * Arguments : none * Return value : none * Exceptions : * Description : close the spi connection */ void SPI_close(void) { MCBSP_close(hMcbsp0); } void spi_tx( unsigned char command, unsigned char parameter ) { SPI_txReady(); /* write the command */ DXR10 = ( ( command << 8 ) | ( parameter ) ); } unsigned int spi_rx( void ) { unsigned int val = 0; SPI_rxReady(); val = DRR10; return val; }