/*
* lpcload.c - load firmware into ram of lpc2220 via uart0
*
- * author: hackbard@hackdaworld.org
+ * author: hackbard@hackdaworld.org, rolf.anders@physik.uni-augsburg.de
*
+ * build: make
+ * usage: sudo ./lpcload -d /dev/ttyS0 -f firmware.hex [-v]
*/
#include <stdio.h>
#define VERBOSE (1<<0)
#define FIRMWARE (1<<1)
+#define TXRX_TYPE_SYNC 0x00
+#define TXRX_TYPE_CKSM 0x00
#define TXRX_TYPE_BAUD 0x01
-#define TXRX_TYPE_SYNC 0x02
-#define TXRX_TYPE_CMD 0x03
-#define TXRX_TYPE_DATA 0x04
+#define TXRX_TYPE_CMD 0x02
+#define TXRX_TYPE_DATA 0x03
+#define TXRX_TYPE_GO 0x04
#define CMD_SUCCESS "0\r\n"
#define INVALID_COMMAND "1\r\n"
char fwfile[128]; /* firmware file */
u8 info; /* info/mode */
char freq[8]; /* frequency */
- int partid; /* part id */
- u8 bcv[2]; /* boot code version */
- u32 hoff; /* start addr of ihex file */
u32 roff; /* ram offset of uc */
} t_lpc;
// input/output baudrate
- cfsetispeed(&term,B9600);
- cfsetospeed(&term,B9600);
+ cfsetispeed(&term,B38400);
+ cfsetospeed(&term,B38400);
// control options -> 8n1
term.c_lflag&=~(ICANON|ECHO|ECHOE|ISIG);
- // input options -> disable flow control
+ // input options -> enable flow control
- term.c_iflag&=~(IXON|IXOFF|IXANY);
+ //term.c_iflag&=~(IXON|IXOFF|IXANY|INLCR|ICRNL);
+ term.c_iflag&=~(INLCR|ICRNL|IXANY);
+ term.c_iflag|=(IXON|IXOFF);
+
+ // output options
+
+ term.c_oflag=0;
- // more control options -> timeout
+ // more control options -> timeout / flow control
term.c_cc[VMIN]=0;
term.c_cc[VTIME]=10; // 1 second timeout
+ term.c_cc[VSTART]=0x11;
+ term.c_cc[VSTOP]=0x13;
tcsetattr(lpc->sfd,TCSANOW,&term);
int open_firmware(t_lpc *lpc) {
- int ret;
- char buf[BUFSIZE];
-
/* open firmware file */
lpc->fwfd=open(lpc->fwfile,O_RDONLY);
if(lpc->fwfd<0)
perror("fw open");
- /* read hex file offset */
-
- ret=read(lpc->fwfd,buf,7);
- if(buf[0]!=':') {
- printf("fw open: not an intel hex file?\n");
- return -1;
- }
- sscanf(buf+3,"%04x",&(lpc->hoff));
- lseek(lpc->fwfd,0,SEEK_SET);
-
return lpc->fwfd;
}
len-=ret;
cnt+=ret;
}
- if(lpc->info&VERBOSE)
- printf(" (%d)\n",cnt);
+ if(lpc->info&VERBOSE) {
+ printf(" | ");
+ for(i=0;i<cnt;i++)
+ printf("%02x ",buf[i]);
+ printf("| (%d)\n",cnt);
+ }
/* cut the echo if not of type auto baud */
/* read */
- if(lpc->info&VERBOSE)
- printf(" << ");
+ ret=read(lpc->sfd,buf,1);
+ if(ret<0) {
+ perror("txrx read (first byte)");
+ return ret;
+ }
+
+ switch(buf[0]) {
+ case 'S':
+ cnt=13;
+ break;
+ case 'O':
+ cnt=3;
+ break;
+ case 'R':
+ cnt=7;
+ break;
+ case '0':
+ cnt=2;
+ break;
+ default:
+ printf("txrx read: bad return byte '%02x'\n",buf[0]);
+ break;
+ }
+
ret=1;
- cnt=0;
- while(ret>0) {
- ret=read(lpc->sfd,buf+cnt,BUFSIZE-cnt);
+ i=cnt;
+ while(i) {
+ ret=read(lpc->sfd,buf+1+cnt-i,i);
if(ret<0) {
- perror("txrx read");
+ perror("txrx read (next bytes)");
return ret;
}
- if(ret+cnt>BUFSIZE) {
- printf("txrx read: too small buf size (%d)!\n",BUFSIZE);
- return -1;
- }
- if(lpc->info&VERBOSE)
- for(i=0;i<ret;i++)
- printf("%c",
- ((buf[cnt+i]>0x19)&(buf[cnt+i]<0x7f))?
- buf[cnt+i]:'.');
- cnt+=ret;
+ i-=ret;
}
- if(lpc->info&VERBOSE)
- printf(" (%d)\n",cnt);
- buf[cnt]='\0';
+ if(lpc->info&VERBOSE) {
+ printf(" << ");
+ for(i=0;i<cnt+1;i++)
+ printf("%c",((buf[i]>0x19)&(buf[i]<0x7f))?
+ buf[i]:'.');
+ printf(" | ");
+ for(i=0;i<cnt+1;i++)
+ printf("%02x ",buf[i]);
+ printf("| (%d)\n",cnt+1);
+ }
+ buf[cnt+1]='\0';
+
+ /* return if type is go */
- /* check/strip return code if type is data */
+ if(type==TXRX_TYPE_GO)
+ return 0;
+
+ /* check/strip return code if type is cmd */
if(type==TXRX_TYPE_CMD) {
ret=strlen(CMD_SUCCESS);
return 0;
}
-int read_part_id(t_lpc *lpc) {
+int unlock_go(t_lpc *lpc) {
char buf[BUFSIZE];
+ int ret;
- memcpy(buf,"J\r\n",3);
- txrx(lpc,buf,3,TXRX_TYPE_CMD);
- lpc->partid=atoi(buf);
+ memcpy(buf,"U 23130\r\n",9);
+ ret=txrx(lpc,buf,9,TXRX_TYPE_CMD);
- return lpc->partid;
+ return ret;
}
-int read_bcv(t_lpc *lpc) {
+int go(t_lpc *lpc) {
char buf[BUFSIZE];
- char *ptr;
+ int ret,len;
- memcpy(buf,"K\r\n",3);
- txrx(lpc,buf,3,TXRX_TYPE_CMD);
- ptr=strtok(buf,"\r\n");
- lpc->bcv[0]=strtol(ptr,NULL,16);
- ptr=strtok(NULL,"\r\n");
- lpc->bcv[1]=strtol(ptr,NULL,16);
+ snprintf(buf,BUFSIZE,"G %d A\r\n",lpc->roff);
+ len=strlen(buf);
+ ret=txrx(lpc,buf,len,TXRX_TYPE_GO);
- return 0;
+ return ret;
}
-int uuencode(u8 *in,char *out) {
+int uuencode(u8 *in,u8 *out,int len) {
- out[0]=0x20+((in[0]>>2)&0x3f);
- out[1]=0x20+(((in[0]<<4)|(in[1]>>4))&0x3f);
- out[2]=0x20+(((in[1]<<2)|(in[2]>>6))&0x3f);
- out[3]=0x20+(in[2]&0x3f);
+ out[0]=0x20+len;
+ out[1]=0x20+((in[0]>>2)&0x3f);
+ out[2]=0x20+(((in[0]<<4)|(in[1]>>4))&0x3f);
+ out[3]=0x20+(((in[1]<<2)|(in[2]>>6))&0x3f);
+ out[4]=0x20+(in[2]&0x3f);
return 0;
}
-int write_to_ram(t_lpc *lpc,u8 *buf,u32 addr,int len) {
+int write_to_ram(t_lpc *lpc,char *buf,u32 addr,int len) {
int lcount;
u32 checksum;
}
/* make it a multiple of 3 (reason: uuencode) */
- nlen=(len/3+1)*3;
+ nlen=(!(len%3))?len:((len/3+1)*3);
if(nlen>BUFSIZE) {
printf("ram write: too much data\n");
return -1;
for(i=len;i<nlen;i++) buf[i]=0;
/* prepare addr */
- addr+=(lpc->roff-lpc->hoff);
+ addr+=lpc->roff;
/* prepare write command */
if(lpc->info&VERBOSE)
- printf("writing %02x bytes to %08x\n",len,addr);
+ printf("writing 0x%02x bytes to 0x%08x\n",len,addr);
snprintf(txrxbuf,BUFSIZE,"W %d %d\r\n",addr,len);
slen=strlen(txrxbuf);
/* send command and check return code */
txrx(lpc,txrxbuf,slen,TXRX_TYPE_CMD);
- if(strncmp(txrxbuf,"OK\r\n",4)) {
- printf("ram write: write command failed\n");
- return -1;
- }
/* send data */
lcount=0;
while(bcnt<nlen) {
/* uuencode / prepare data bytes */
- uuencode(buf+bcnt,txrxbuf);
- txrxbuf[4]='\0';
- txrxbuf[5]='\0';
+ uuencode((u8 *)(buf+bcnt),(u8 *)(txrxbuf),
+ (bcnt==nlen-3)?(len%3?len%3:3):3);
+ txrxbuf[5]='\r';
+ txrxbuf[6]='\n';
/* checksum */
- checksum+=(buf[0]+buf[1]+buf[2]);
+ checksum+=((u8)buf[bcnt]+(u8)buf[bcnt+1]+(u8)buf[bcnt+2]);
/* send a data line */
- txrx(lpc,txrxbuf,6,TXRX_TYPE_DATA);
+ txrx(lpc,txrxbuf,7,TXRX_TYPE_DATA);
/* increase counters */
lcount+=1;
/* checksum */
if((!(lcount%20))|(bcnt==nlen)) {
+ /* send backtick */
+ memcpy(txrxbuf,"`\r\n",3);
+ //txrx(lpc,txrxbuf,3,TXRX_TYPE_DATA);
/* send checksum */
snprintf(txrxbuf,BUFSIZE,"%d\r\n",checksum);
slen=strlen(txrxbuf);
- txrx(lpc,txrxbuf,slen,TXRX_TYPE_CMD);
- if(!strncmp(txrxbuf,"RESEND\r\n",8)) {
+ txrx(lpc,txrxbuf,slen,TXRX_TYPE_CKSM);
+ if(!strncmp(txrxbuf,"RESE",4)) {
+ read(lpc->sfd,txrxbuf+4,4);
printf("ram write: resending ...\n");
bcnt-=count;
}
int firmware_to_ram(t_lpc *lpc) {
char buf[BUFSIZE];
- u8 data[BUFSIZE];
- u32 addr,len,type,val;
- u8 cksum;
- int ret,i;
+ u32 addr,len,type;
+ int ret,temp;
/* read a line */
+ ret=1;
while(ret) {
/* sync line */
ret=read(lpc->fwfd,buf,1);
/* successfull return if type is end of file */
if(type==0x01)
return 0;
- /* read data */
- ret=read(lpc->fwfd,buf,2*len);
- if(ret!=(2*len)) {
+ /* read data (and cksum) */
+ ret=read(lpc->fwfd,buf,2*(len+1));
+ if(ret!=(2*(len+1))) {
printf("fw to ram: data missing\n");
return -1;
}
- /* checksum */
- cksum=0;
- for(i=0;i<len;i++) {
- sscanf(buf+2*i,"%02x",&val);
- data[i]=val;
- cksum+=data[i];
- }
- ret=read(lpc->fwfd,buf,2);
- sscanf(buf,"%02x",&val);
- if(val+cksum!=0x100) {
- printf("fw to ram: wrong checksum\n");
- return -1;
+ for(ret=0;ret<len;ret++) {
+ sscanf(buf+2*ret,"%02x",&temp);
+ buf[ret]=temp;
}
/* act according to type */
switch(type) {
- case 0x03:
- /* get cs and ip */
- break;
+ //case 0x03:
+ // /* get cs and ip */
+ // break;
case 0x00:
- write_to_ram(lpc,data,addr,len);
+ if(len%4) {
+ printf("fw to ram: invalid len\n");
+ return -1;
+ }
+ write_to_ram(lpc,buf,addr,len);
+ break;
+ case 0x04:
+ lpc->roff=((buf[0]<<28)|(buf[1]<<24));
+ lpc->roff|=((buf[2]<<20)|(buf[3]<<16));
break;
default:
printf("fw to ram: unknown type %02x\n",type);
t_lpc lpc;
int i;
+ int ret;
/*
* initial ...
if(open_serial_device(&lpc)<0)
goto end;
- /* open firmware file */
- if(open_firmware(&lpc)<0)
- goto end;
-
/* boot loader init */
printf("boot loader init ...\n");
if(bl_init(&lpc)<0)
return -1;
- /* read part id */
- read_part_id(&lpc);
- printf("part id: %d\n",lpc.partid);
+ /* quit if there is no hex file to process */
+ if(!(lpc.info&FIRMWARE)) {
+ printf("no firmware -> aborting\n");
+ goto end;
+ }
- /* read boot code version */
- read_bcv(&lpc);
- printf("boot code version: %02x %02x\n",lpc.bcv[0],lpc.bcv[1]);
+ /* open firmware file */
+ if(open_firmware(&lpc)<0)
+ goto end;
- // to be continued ... (parsing fw file and poking it to ram)
+ /* parse intel hex file and write to ram */
+ printf("write firmware to ram ...\n");
firmware_to_ram(&lpc);
+ /* unlock go cmd */
+ printf("unlock go command ...\n");
+ unlock_go(&lpc);
+
+ /* go! */
+ printf("go ...\n");
+ ret=go(&lpc);
+
end:
close(lpc.sfd);
close(lpc.fwfd);
projects / my-code / arm.git / blobdiff