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/*------------------------------------------------------------------------------
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-- This file is a part of the libuc, microcontroler library
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-- Copyright (C) 2012, Alexis Jeandet
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--
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-- This program is free software; you can redistribute it and/or modify
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-- it under the terms of the GNU General Public License as published by
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-- the Free Software Foundation; either version 3 of the License, or
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-- (at your option) any later version.
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--
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-- This program is distributed in the hope that it will be useful,
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-- but WITHOUT ANY WARRANTY; without even the implied warranty of
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-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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-- GNU General Public License for more details.
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--
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-- You should have received a copy of the GNU General Public License
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-- along with this program; if not, write to the Free Software
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-- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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-------------------------------------------------------------------------------
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-- Author : Alexis Jeandet
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-- Mail : alexis.jeandet@gmail.com
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-------------------------------------------------------------------------------*/
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#include "LPC17xx.h"
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#include "bsp.h"
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#include "core.h"
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#include "uart.h"
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#include "libucstrings.h"
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#define __delay(t) for(volatile int i=0;i<t;i++);
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#define ledspos1 LED1_OFF;LED2_ON;LED3_OFF;LED4_ON;LED5_OFF;LED6_ON;LED7_OFF;LED8_ON
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#define ledspos2 LED1_ON;LED2_OFF;LED3_ON;LED4_OFF;LED5_ON;LED6_OFF;LED7_ON;LED8_OFF
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void checkforsdcard();
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void senddummyclocks(int n);
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int sendCMD0();
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int sendCMD8();
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int sendACMD41(int arg);
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int sendCMD55();
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int sendCMD1();
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int sendCMD58();
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int main (void)
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{
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int i;
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bsp_init();
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uartsetbaudrate(UART0,38400);
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checkforsdcard();
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while(!bspsdcardpresent());
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checkforsdcard();
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__delay(1024*10);
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senddummyclocks(74);
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__delay(1024*100);
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if(sendCMD0())
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{
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//__delay(1024*10);
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if(sendCMD8())
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{
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// __delay(1024*10);
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libucprintf("Maybe SD card V2 \n\r");
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if(sendACMD41(1))
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{
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// __delay(1024*10);
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i = sendCMD58();
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if(0x40== (i & 0x40))
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{
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libucprintf("SD HC card \n\r");
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}
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else
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{
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libucprintf("SD card V2 \n\r");
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}
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}
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else
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{
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libucprintf("Unknow card\n\r");
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}
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}
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else
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{
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//libucprintf("Maybe SD card V1 \n\r");
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if(sendACMD41(0))
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{
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libucprintf("SD card V1 \n\r");
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}
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else
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{
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if(sendCMD1())
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{
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libucprintf("MMC V3 card \n\r");
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}
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else
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{
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libucprintf("Unknow card\n\r");
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}
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}
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}
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}
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__delay(1024);
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while(1)
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{
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ledspos1;
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__delay(1024*1024);
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ledspos2;
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__delay(1024*1024);
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}
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return 0;
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}
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int sendCMD0()
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{
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//libucprintf("Send CMD0\n\r");
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int n=10;
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char resp[8];
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bspsdcardselect(1);
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sspputc(SSP0,0x40);
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sspputc(SSP0,0);
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sspputc(SSP0,0);
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sspputc(SSP0,0);
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sspputc(SSP0,0);
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sspputc(SSP0,0x95);
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do
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{sspgetnc(SSP0,resp,1);}
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while(resp[0]!=1 && n--);
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if(resp[0]==1)
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{
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//sspgetnc(SSP0,resp,8);
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bspsdcardselect(0);
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return 1;
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}
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else
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{
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//sspgetnc(SSP0,resp,8);
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bspsdcardselect(0);
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return 0;
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}
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}
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int sendCMD1()
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{
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//libucprintf("Send CMD1\n\r");
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int n=10;
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char resp[8];
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do{
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bspsdcardselect(1);
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sspputc(SSP0,0x41);
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sspputc(SSP0,0);
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sspputc(SSP0,0);
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sspputc(SSP0,0);
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sspputc(SSP0,0);
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sspputc(SSP0,0x1);
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do
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{
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sspgetnc(SSP0,resp,1);
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}while((resp[0] &0x80) && n--);
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n=10;
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resp[0]=0xff;
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}while(resp[0]>1);
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if(resp[0]==0)
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{
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//sspgetnc(SSP0,resp,8);
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bspsdcardselect(0);
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return 1;
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}
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else
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{
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//sspgetnc(SSP0,resp,8);
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bspsdcardselect(0);
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return 0;
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}
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}
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int sendCMD8()
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{
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//libucprintf("Send CMD8\n\r");
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int n=10;
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char resp[8];
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bspsdcardselect(1);
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sspputc(SSP0,0x48);
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sspputc(SSP0,0);
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sspputc(SSP0,0);
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sspputc(SSP0,0x1);
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sspputc(SSP0,0xAA);
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sspputc(SSP0,0x87);
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do
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{sspgetnc(SSP0,resp,1);}
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while(resp[0]!=1 && n--);
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if(resp[0]==1)
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{
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//sspgetnc(SSP0,resp,8);
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bspsdcardselect(0);
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return 1;
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}
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else
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{
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//sspgetnc(SSP0,resp,8);
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bspsdcardselect(0);
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return 0;
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}
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}
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int sendCMD55()
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{
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//libucprintf("Send CMD55\n\r");
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int n=10;
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char resp[8];
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bspsdcardselect(1);
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sspputc(SSP0,0x40|55);
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sspputc(SSP0,0);
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sspputc(SSP0,0);
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sspputc(SSP0,0);
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sspputc(SSP0,0);
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sspputc(SSP0,0x63);
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do
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{sspgetnc(SSP0,resp,1);}
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while(resp[0]!=1 && n--);
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if(resp[0]==1)
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{
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//sspgetnc(SSP0,resp,8);
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bspsdcardselect(0);
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return 1;
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}
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else
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{
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//sspgetnc(SSP0,resp,8);
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bspsdcardselect(0);
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return 0;
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}
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}
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int sendCMD58()
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{
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int n=10;
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char resp[4];
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//libucprintf("Send CMD58\n\r");
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bspsdcardselect(1);
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sspputc(SSP0,0x58);
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sspputc(SSP0,0);
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sspputc(SSP0,0);
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sspputc(SSP0,0x0);
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sspputc(SSP0,0x0);
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sspputc(SSP0,0x1);
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sspgetnc(SSP0,resp,4);
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bspsdcardselect(0);
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int a = resp[0]+(resp[1]<<8)+(resp[1]<<16)+(resp[1]<<24);
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return a;
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}
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int sendACMD41(int arg)
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{
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//libucprintf("Send ACMD41\n\r");
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int n=10;
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char resp[10];
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do{
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sendCMD55();
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__delay(1024);
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n=10;
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resp[0]=0xff;
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bspsdcardselect(1);
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sspputc(SSP0,0x80+0x41);
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sspputc(SSP0,(char)(arg>>24));
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sspputc(SSP0,(char)(arg>>16));
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sspputc(SSP0,(char)(arg>>8));
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sspputc(SSP0,(char)(arg));
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sspputc(SSP0,0x1);
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do
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{
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sspgetnc(SSP0,resp,1);
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}while((resp[0] & 0x80) && n--);
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}while(resp[0]>1);
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if(resp[0]==0)
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{
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//sspgetnc(SSP0,resp,8);
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bspsdcardselect(0);
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return 1;
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}
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else
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{
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//sspgetnc(SSP0,resp,8);
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bspsdcardselect(0);
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return 0;
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}
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}
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void senddummyclocks(int n)
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{
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libucprintf("Send dummy clocks\n\r");
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while(n--)
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{sspputc(SSP0,0xFF);}
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}
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void checkforsdcard()
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{
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if(bspsdcardpresent())libucprintf("SD card detected\n\r");
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else libucprintf("NO SD card detected\n\r");
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}
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