3451556310
the primary serial bootloader (bootloader06) to wait for a specific keypress before running the downloaded program.
195 lines
4.1 KiB
C
195 lines
4.1 KiB
C
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
FILE *fp;
|
|
|
|
|
|
unsigned char get_one ( void )
|
|
{
|
|
unsigned int ra;
|
|
unsigned char data[8];
|
|
|
|
ra=fread(data,1,1,fp);
|
|
if(ra==0) exit(0);
|
|
return(data[0]);
|
|
}
|
|
void PUT32 ( unsigned int a, unsigned int d )
|
|
{
|
|
printf("%08X:%08X\n",a,d);
|
|
}
|
|
|
|
int main ( void )
|
|
{
|
|
unsigned int state;
|
|
unsigned int byte_count;
|
|
unsigned int address;
|
|
unsigned int record_type;
|
|
unsigned int segment;
|
|
unsigned int start;
|
|
unsigned int data;
|
|
unsigned int sum;
|
|
unsigned int ra;
|
|
|
|
fp=fopen("blinker01.hex","rb");
|
|
if(fp==NULL) return(1);
|
|
|
|
state=0;
|
|
segment=0;
|
|
while(1)
|
|
{
|
|
ra=get_one();
|
|
if(ra==':')
|
|
{
|
|
state=1;
|
|
continue;
|
|
}
|
|
if(ra==0x0D)
|
|
{
|
|
state=0;
|
|
continue;
|
|
}
|
|
if(ra==0x0A)
|
|
{
|
|
state=0;
|
|
continue;
|
|
}
|
|
if((ra=='g')||(ra=='G'))
|
|
{
|
|
uart_putc(0x0D);
|
|
uart_putc('-');
|
|
uart_putc('-');
|
|
uart_putc(0x0D);
|
|
uart_putc(0x0A);
|
|
uart_putc(0x0A);
|
|
}
|
|
switch(state)
|
|
{
|
|
case 0:
|
|
{
|
|
break;
|
|
}
|
|
case 1:
|
|
case 2:
|
|
{
|
|
byte_count<<=4;
|
|
if(ra>0x39) ra-=7;
|
|
byte_count|=(ra&0xF);
|
|
byte_count&=0xFF;
|
|
state++;
|
|
break;
|
|
}
|
|
case 3:
|
|
case 4:
|
|
case 5:
|
|
case 6:
|
|
{
|
|
address<<=4;
|
|
if(ra>0x39) ra-=7;
|
|
address|=(ra&0xF);
|
|
address&=0xFFFF;
|
|
address|=segment;
|
|
state++;
|
|
break;
|
|
}
|
|
case 7:
|
|
{
|
|
record_type<<=4;
|
|
if(ra>0x39) ra-=7;
|
|
record_type|=(ra&0xF);
|
|
record_type&=0xFF;
|
|
state++;
|
|
break;
|
|
}
|
|
case 8:
|
|
{
|
|
record_type<<=4;
|
|
if(ra>0x39) ra-=7;
|
|
record_type|=(ra&0xF);
|
|
record_type&=0xFF;
|
|
switch(record_type)
|
|
{
|
|
case 0x00:
|
|
{
|
|
state=14;
|
|
break;
|
|
}
|
|
case 0x01:
|
|
{
|
|
printf("sum 0x%08X\n",sum);
|
|
state=0;
|
|
break;
|
|
}
|
|
case 0x02:
|
|
{
|
|
state=9;
|
|
break;
|
|
}
|
|
default:
|
|
{
|
|
state=0;
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
case 9:
|
|
case 10:
|
|
case 11:
|
|
case 12:
|
|
{
|
|
segment<<=4;
|
|
if(ra>0x39) ra-=7;
|
|
segment|=(ra&0xF);
|
|
segment&=0xFFFF;
|
|
state++;
|
|
break;
|
|
}
|
|
case 13:
|
|
{
|
|
segment<<=4;
|
|
state=0;
|
|
break;
|
|
}
|
|
case 14:
|
|
case 15:
|
|
case 16:
|
|
case 17:
|
|
case 18:
|
|
case 19:
|
|
case 20:
|
|
case 21:
|
|
{
|
|
data<<=4;
|
|
if(ra>0x39) ra-=7;
|
|
data|=(ra&0xF);
|
|
if(state==21)
|
|
{
|
|
ra=(data>>24)|(data<<24);
|
|
ra|=(data>>8)&0x0000FF00;
|
|
ra|=(data<<8)&0x00FF0000;
|
|
data=ra;
|
|
PUT32(address,data);
|
|
sum+=address;
|
|
sum+=data;
|
|
address+=4;
|
|
state=14;
|
|
}
|
|
else
|
|
{
|
|
state++;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return(0);
|
|
}
|
|
|
|
|
|
|
|
|