msp430 与SD卡的ti源程序

// *********************************************************** // File: mmc.c // Description: Library to access a MultiMediaCard // functions: init, read, write ... // C. Speck / S. Schauer // Texas Instruments, Inc // June 2005 // // Version 1.1 // corrected comments about connection the MMC to the MSP430 // increased timeout in mmcGetXXResponse // // *********************************************************** // MMC Lib // *********************************************************** /* *********************************************************** * THIS PROGRAM IS PROVIDED "AS IS". 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Except * as specifically provided herein, nothing in this agreement * shall be construed as conferring by implication, estoppel, * or otherwise, upon you, any license or other right under any * TI patents, copyrights or trade secrets. * * You may not use the Program in non-TI devices. * ********************************************************* */ // ******************************************************** // // // // MSP430F169 MMC Card // ----------------- ----------------- // /|\| XIN|- /|\ | | // | | | | | | // --|RST XOUT|- |--|Pin4/Vcc | // | | | | // | | | | // | P5.0 |<-------|Pin6/CD | // | P5.4 |------->|Pin1/CS | // | | | | // | P5.2/SOMI1 |------->|Pin2/DIN | // | P5.1/SIMO1 |<-------|Pin7/DOUT | // | P5.3/UCLK1 |------->|Pin5/CLK | // | | | | // | | |--|Pin3/GND | // | // = // // Pin configuration at MSP430F169: // -------------------------------- // MSP430F169 MSP Pin MMC MMC Pin // ------------------------------------------------------------- // P5.4 48 ChipSelect 1 // P5.2 / SOMI 46 DataIn 2 // GND 3 (0 V) // VDD 4 (3.3 V) // P5.3 / UCLK1 47 Clock 5 // P5.0 44 CardDetect 6 // P5.1 / SIMO 45 DataOut 7 // ------------------------------------------------------------- // // // // #ifndef _MMCLIB_C #define _MMCLIB_C // //--------------------------------------------------------------- #include "mmc.h" #include "MSP430x16x.H" //#define withDMA // Function Prototypes char mmcGetResponse(void); char mmcGetXXResponse(const char resp); char mmcCheckBusy(void); void initSPI (void); unsigned char spiSendByte(const unsigned char data); char mmc_GoIdle(); // Varialbes char mmc_buffer[512] = { 0 }; // Buffer for mmc i/o for data and registers //--------------------------------------------------------------------- // setup usart1 in spi mode void initSPI (void) { UCTL1 = SWRST; // 8-bit SPI Master **SWRST** UTCTL1 = CKPH | SSEL1 | SSEL0 | STC; // SMCLK, 3-pin mode, clock idle low, data valid on rising edge, UCLK delayed UBR01 = 0x02; // 0x02: UCLK/2 (4 MHz), works also with 3 and 4 UBR11 = 0x00; // -"- UMCTL1 = 0x00; // no modulation UCTL1 = CHAR | SYNC | MM | SWRST; // 8-bit SPI Master **SWRST** UCTL1 &= ~SWRST; // clear SWRST ME2 |= USPIE1; // Enable USART1 SPI mode while (!(IFG2 & UTXIFG1)); // USART1 TX buffer ready (empty)? } // Initialize MMC card char initMMC (void) { //raise SS and MOSI for 80 clock cycles //SendByte(0xff) 10 times with SS high //RAISE SS int i; // Port 5 Function Dir On/Off // 5.0-mmcCD Out 0 - card inserted // 5.1-Dout Out 0 - off 1 - On -> init in SPI_Init // 5.2-Din Inp 0 - off 1 - On -> init in SPI_Init // 5.3-Clk Out - -> init in SPI_Init // 5.4-mmcCS Out 0 - Active 1 - none Active P5SEL |= 0x0E; P5SEL &= ~0x11; P5OUT |= 0x10; P5DIR |= 0x1A; initSPI(); //initialization sequence on PowerUp CS_HIGH(); for(i=0;i<=9;i++) spiSendByte(0xff); return (mmc_GoIdle()); } char mmc_GoIdle() { char response=0x01; CS_LOW(); //Send Command 0 to put MMC in SPI mode mmcSendCmd(MMC_GO_IDLE_STATE,0,0x95); //Now wait for READY RESPONSE if(mmcGetResponse()!=0x01) return MMC_INIT_ERROR; while(response==0x01) { CS_HIGH(); spiSendByte(0xff); CS_LOW(); mmcSendCmd(MMC_SEND_OP_COND,0x00,0xff); response=mmcGetResponse(); } CS_HIGH(); spiSendByte(0xff); return (MMC_SUCCESS); } // mmc Get Responce char mmcGetResponse(void) { //Response comes 1-8bytes after command //the first bit will be a 0 //followed by an error code //data will be 0xff until response int i=0; char response; while(i<=64) { response=spiSendByte(0xff);