uue.c

uboot底层驱动

/*
 *	xmodem.c   -  the xmodem protocol  
 *	
 *	Author: 	yu feng <[e-mail]>
 *	Date:		2007-6-2
 */


/* *************************************************************** */

#include "my_string.h"
#include "my_printf.h"
#include "uart.h"



/*#define SYSCFG                          0x03FF0000
#define IOPMOD                          (SYSCFG + 0x5000)
#define IOPCON                          (SYSCFG + 0x5004)
#define IOPDATA                         (SYSCFG + 0x5008)

#define LED_BANK                        IOPDATA
#define ALL_LEDS                        0xF0  */

extern int count;



int	ReadC(void)
{
	
	char tempch;
	uart_getchar( UART0_BASE, &tempch );
	return tempch;

}

#define LF		('\n')
#define CR		('\r')
#define CTRL_D		('D'-'@')
#define BEGIN "begin"
#define END   "end"

int ReadLineZ(char *buffer, int maxlen)
{
    int pos = 0;
    int c;

    do {
	c =ReadC();
	if (c == CR || c == LF) {
	    buffer[pos] = 0;
	    return pos;
	}
	if (c == CTRL_D) {
	    buffer[0] = 0;
	    return -1;
	}
	if (c >= ' ' && pos < maxlen)
	    buffer[pos++] = c;
    } while (1);
}

int cistreq(char *s, char *t, int term)
{
    for ( ; ((*s | 0x20) == (*t | 0x20)) || (*s <= term && *t <= term); s++, t++)
        if (*s <= term)
            return 1;
    return 0;
}

char *nextword(char *word)
{
    while (*word > ' ') word++;
    while (*word == ' ') word++;
    return word;
}


int uue_download(unsigned address)
{
    char *buffer = (char *)address;
    char *s;
    int errs = 0;
    int i;
    unsigned c, w;
    int offset = 0;
    int len; 
    char command_line[256];
	  char gpbuff[256];
	
    s = command_line;
    do {
	if (ReadLineZ(s, sizeof(command_line)-1) == -1)
	    return -1;
    } while (!cistreq(s, BEGIN, ' '));
    s = nextword(s);
    s = nextword(s);
    my_strcpy(gpbuff, s);
    do {
	s = command_line;
	len = ReadLineZ(s, sizeof(command_line)-1);
	
	if (len == -1 || cistreq(s, END, ' '))
	    break;
	c = *s++;
	if (!c) continue;
	len = c - 0x20;
	if (len == 0) continue;
	if (len > 45) { errs++; continue; }
	i = 0;
	while (1) {
	    c = *s;
	    if (c) {
		c -= 0x20;
		if (c >= 0x40) { errs++; break; }
		s++;
	    }
	    w = (w << 6) + c;
	    if ((++i & 3) == 0) {
		buffer[offset++] = w >> 16;
		if (--len == 0) break;
		buffer[offset++] = w >> 8;
		if (--len == 0) break;
		buffer[offset++] = w;
		if (--len == 0) break;
	    }
	}
    } while (1);
   
    if (errs)
	     my_printf("Error: %d errors encountered during download. \n\r", errs);
	count = offset;
    my_printf("Loaded file %s at address 0x%x, size = %d \n\r", gpbuff, buffer, offset);
    return 0;
}

int uue_receive(unsigned download_addr)
//int uue_receive(char * download_addr)
{			
	 my_printf( " \nbotloader download  0x%x\n\r",download_addr );
  

	uue_download( download_addr );
	
		
	return 0;	
}