/*
* 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>
#include <fcntl.h>
#include <termios.h>
-#define VERBOSE (1<<0)
-#define FIRMWARE (1<<1)
-
-#define CRYSTFREQ "10000"
-
-#define BUFSIZE 64
+#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_CMD 0x02
+#define TXRX_TYPE_DATA 0x03
+#define TXRX_TYPE_GO 0x04
+
+#define CMD_SUCCESS "0\r\n"
+#define INVALID_COMMAND "1\r\n"
+#define SRC_ADDR_ERROR "2\r\n"
+#define DST_ADDR_ERROR "3\r\n"
+#define SRC_ADDR_NOT_MAPPED "4\r\n"
+#define DST_ADDR_NOT_MAPPED "5\r\n"
+#define COUNT_ERROR "6\r\n"
+#define COMPARE_ERROR "10\r\n"
+#define BUSY "11\r\n"
+#define PARAM_ERROR "12\r\n"
+#define ADDR_ERROR "13\r\n"
+#define ADDR_NOT_MAPPED "14\r\n"
+#define CMD_LOCKED "15\r\n"
+#define INVALID_CODE "16\r\n"
+#define INVALID_BAUD_RATE "17\r\n"
+#define INVALID_STOP_BIT "18\r\n"
+
+#define CRYSTFREQ "10000"
+#define RAMOFFSET 0x40000200
+
+#define BUFSIZE 128
+
+typedef unsigned char u8;
+typedef unsigned short u16;
+typedef unsigned int u32;
+
+typedef struct s_lpc {
+ int sfd; /* serial fd */
+ char sdev[128]; /* seriel device */
+ int fwfd; /* fimrware fd */
+ char fwfile[128]; /* firmware file */
+ u8 info; /* info/mode */
+ char freq[8]; /* frequency */
+ u32 roff; /* ram offset of uc */
+} t_lpc;
void usage(void) {
printf(" -d <serial device>\n");
printf(" -f <firmware>\n");
printf(" -c <crystal freq>\n");
+ printf(" -r <ram offset>\n");
printf(" -v\n");
}
-int txrx(int fd,char *buf,int *len,unsigned char v) {
+int open_serial_device(t_lpc *lpc) {
+
+ struct termios term;
+
+ //memset(&term,0,sizeof(struct termios));
+
+ /* open serial device */
+
+ lpc->sfd=open(lpc->sdev,O_RDWR);
+ if(lpc->sfd<0) {
+ perror("tts open");
+ return lpc->sfd;
+ }
+
+ /* configure the serial device */
+
+ tcgetattr(lpc->sfd,&term);
+
+ // input/output baudrate
+
+ cfsetispeed(&term,B38400);
+ cfsetospeed(&term,B38400);
+
+ // control options -> 8n1
+
+ term.c_cflag&=~PARENB; // no parity
+ term.c_cflag&=~CSTOPB; // only 1 stop bit
+ term.c_cflag&=~CSIZE; // no bit mask for data bits
+ term.c_cflag|=CS8; // 8 data bits
+
+ // line options -> raw input
+
+ term.c_lflag&=~(ICANON|ECHO|ECHOE|ISIG);
+
+ // input options -> enable flow control
+
+ //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 / 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);
+
+ return lpc->sfd;
+}
+
+int open_firmware(t_lpc *lpc) {
+
+ /* open firmware file */
+
+ lpc->fwfd=open(lpc->fwfile,O_RDONLY);
+
+ if(lpc->fwfd<0)
+ perror("fw open");
+
+ return lpc->fwfd;
+}
+
+int txrx(t_lpc *lpc,char *buf,int len,u8 type) {
int ret,cnt;
int i;
/* write */
- if(v&VERBOSE)
+ if(lpc->info&VERBOSE)
printf(" >> ");
cnt=0;
- while(*len) {
- ret=write(fd,buf+cnt,*len);
+ while(len) {
+ ret=write(lpc->sfd,buf+cnt,len);
if(ret<0) {
perror("txrx write");
return ret;
}
- if(v&VERBOSE)
+ if(lpc->info&VERBOSE)
for(i=0;i<ret;i++)
printf("%c",
((buf[cnt+i]>0x19)&(buf[cnt+i]<0x7f))?
buf[cnt+i]:'.');
- *len-=ret;
+ len-=ret;
cnt+=ret;
}
- if(v&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 */
+
+ if(type!=TXRX_TYPE_BAUD) {
+ while(cnt) {
+ ret=read(lpc->sfd,buf,cnt);
+ if(ret<0) {
+ perror("txrx echo cut");
+ return ret;
+ }
+ cnt-=ret;
+ }
+ }
- /* cut the echo */
- // add more checking here!
- while(cnt)
- cnt-=read(fd,buf,cnt);
+ /* return here if type is data */
+
+ if(type==TXRX_TYPE_DATA)
+ return cnt;
/* read */
- if(v&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(fd,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);
+ i-=ret;
+ }
+ 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 */
+
+ if(type==TXRX_TYPE_GO)
+ return 0;
+
+ /* check/strip return code if type is cmd */
+
+ if(type==TXRX_TYPE_CMD) {
+ ret=strlen(CMD_SUCCESS);
+ if(!strncmp(buf,CMD_SUCCESS,ret)) {
+ for(i=ret;i<cnt;i++)
+ buf[i-ret]=buf[i];
+ buf[cnt]='\0';
+ }
+ else {
+ printf("txrx bad return code!\n");
return -1;
}
- if(v&VERBOSE)
- for(i=0;i<ret;i++)
- printf("%c",
- ((buf[cnt+i]>0x19)&(buf[cnt+i]<0x7f))?
- buf[cnt+i]:'.');
- cnt+=ret;
}
- if(v&VERBOSE)
- printf(" (%d)\n",cnt);
- *len=cnt;
return cnt;
}
-int main(int argc,char **argv) {
+int bl_init(t_lpc *lpc) {
- int i;
- char tts[128];
- int tts_fd;
- char fw[128];
- int fw_fd;
- unsigned char info;
- struct termios term;
- char cfreq[8];
+ char buf[BUFSIZE];
int len;
+
+ /* auto baud sequence */
+ buf[0]='?';
+ txrx(lpc,buf,1,TXRX_TYPE_BAUD);
+ if(strncmp(buf,"Synchronized\r\n",14)) {
+ printf("auto baud detection failed\n");
+ return -1;
+ }
+
+ /* tell bl that we are synchronized (it's allready in buf) */
+ txrx(lpc,buf,14,TXRX_TYPE_SYNC);
+ if(strncmp(buf,"OK\r\n",4)) {
+ printf("sync failed\n");
+ return -1;
+ }
+
+ /* tell bl the crystal frequency */
+ len=strlen(lpc->freq)+2;
+ strncpy(buf,lpc->freq,BUFSIZE);
+ buf[len-2]='\r';
+ buf[len-1]='\n';
+ txrx(lpc,buf,len,TXRX_TYPE_SYNC);
+ if(strncmp(buf,"OK\r\n",4)) {
+ printf("freq set failed\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+int unlock_go(t_lpc *lpc) {
+
+ char buf[BUFSIZE];
+ int ret;
+
+ memcpy(buf,"U 23130\r\n",9);
+ ret=txrx(lpc,buf,9,TXRX_TYPE_CMD);
+
+ return ret;
+}
+
+int go(t_lpc *lpc) {
+
char buf[BUFSIZE];
+ int ret,len;
+
+ snprintf(buf,BUFSIZE,"G %d A\r\n",lpc->roff);
+ len=strlen(buf);
+ ret=txrx(lpc,buf,len,TXRX_TYPE_GO);
+
+ return ret;
+}
+
+int uuencode(u8 *in,u8 *out,int len) {
+
+ 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,char *buf,u32 addr,int len) {
+
+ int lcount;
+ u32 checksum;
+ char txrxbuf[BUFSIZE];
+ int count,bcnt;
+ int nlen,slen;
+ int i;
+
+ /* check length */
+ if(len%4) {
+ printf("ram write: not a multiple of 4\n");
+ return -1;
+ }
+
+ /* make it a multiple of 3 (reason: uuencode) */
+ 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;
+
+ /* prepare write command */
+ if(lpc->info&VERBOSE)
+ 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);
+
+ /* send data */
+ lcount=0;
+ bcnt=0;
+ count=0;
+ checksum=0;
+ while(bcnt<nlen) {
+
+ /* uuencode / prepare data bytes */
+ uuencode((u8 *)(buf+bcnt),(u8 *)(txrxbuf),
+ (bcnt==nlen-3)?(len%3?len%3:3):3);
+ txrxbuf[5]='\r';
+ txrxbuf[6]='\n';
+
+ /* checksum */
+ checksum+=((u8)buf[bcnt]+(u8)buf[bcnt+1]+(u8)buf[bcnt+2]);
+
+ /* send a data line */
+ txrx(lpc,txrxbuf,7,TXRX_TYPE_DATA);
+
+ /* increase counters */
+ lcount+=1;
+ bcnt+=3;
+ count+=3;
+
+ /* 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_CKSM);
+ if(!strncmp(txrxbuf,"RESE",4)) {
+ read(lpc->sfd,txrxbuf+4,4);
+ printf("ram write: resending ...\n");
+ bcnt-=count;
+ }
+ if(strncmp(txrxbuf,"OK\r\n",4)) {
+ printf("ram write: bad response\n");
+ return -1;
+ }
+ /* reset checksum & counter */
+ checksum=0;
+ count=0;
+ }
+
+ }
+
+ return 0;
+}
+
+int firmware_to_ram(t_lpc *lpc) {
+
+ char buf[BUFSIZE];
+ u32 addr,len,type;
+ int ret,temp;
+
+ /* read a line */
+ ret=1;
+ while(ret) {
+ /* sync line */
+ ret=read(lpc->fwfd,buf,1);
+ switch(buf[0]) {
+ case '\r':
+ continue;
+ case '\n':
+ continue;
+ case ':':
+ /* start code */
+ break;
+ default:
+ printf("fw to ram: no ihex format\n");
+ return -1;
+ }
+ /* read len */
+ ret=read(lpc->fwfd,buf,2);
+ sscanf(buf,"%02x",&len);
+ if(len%4) {
+ printf("fw to ram: len not a multiple of 4\n");
+ return -1;
+ }
+ /* read addr */
+ ret=read(lpc->fwfd,buf,4);
+ sscanf(buf,"%04x",&addr);
+ /* read type */
+ ret=read(lpc->fwfd,buf,2);
+ sscanf(buf,"%02x",&type);
+ /* successfull return if type is end of file */
+ if(type==0x01)
+ return 0;
+ /* 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;
+ }
+ 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 0x00:
+ 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);
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+int main(int argc,char **argv) {
+
+ t_lpc lpc;
+ int i;
+ int ret;
/*
* initial ...
*/
- info=0;
- memset(&term,0,sizeof(struct termios));
- strncpy(cfreq,CRYSTFREQ,7);
+ memset(&lpc,0,sizeof(t_lpc));
+ strncpy(lpc.freq,CRYSTFREQ,7);
+ lpc.roff=RAMOFFSET;
/* parse argv */
switch(argv[i][1]) {
case 'd':
- strncpy(tts,argv[++i],127);
+ strncpy(lpc.sdev,argv[++i],127);
break;
case 'f':
- strncpy(fw,argv[++i],127);
- info|=FIRMWARE;
+ strncpy(lpc.fwfile,argv[++i],127);
+ lpc.info|=FIRMWARE;
break;
case 'v':
- info|=VERBOSE;
+ lpc.info|=VERBOSE;
break;
case 'c':
- strncpy(cfreq,argv[++i],7);
+ strncpy(lpc.freq,argv[++i],7);
break;
default:
usage();
}
- /*
- * open serial device
- */
-
- tts_fd=open(tts,O_RDWR);
- if(tts_fd<0) {
- perror("tts open");
- return tts_fd;
- }
-
- /*
- * configure serial device
- */
-
- tcgetattr(tts_fd,&term);
-
- // input/output baudrate
-
- cfsetispeed(&term,B9600);
- cfsetospeed(&term,B9600);
-
- // control options -> 8n1
+ /* open serial port */
+ if(open_serial_device(&lpc)<0)
+ goto end;
- term.c_cflag&=~PARENB; // no parity
- term.c_cflag&=~CSTOPB; // only 1 stop bit
- term.c_cflag&=~CSIZE; // no bit mask for data bits
- term.c_cflag|=CS8; // 8 data bits
-
- // line options -> raw input
-
- term.c_lflag&=~(ICANON|ECHO|ECHOE|ISIG);
-
- // input options -> disable flow control
-
- term.c_iflag&=~(IXON|IXOFF|IXANY);
-
- // more control options -> timeout
-
- term.c_cc[VMIN]=0;
- term.c_cc[VTIME]=10; // 1 second timeout
-
- tcsetattr(tts_fd,TCSANOW,&term);
-
- /* auto baud sequence */
-
- printf("auto baud sequence ...\n");
- write(tts_fd,"?",1);
- len=0;
- txrx(tts_fd,buf,&len,info);
- if(strncmp(buf,"Synchronized\r\n",14)) {
- printf("auto baud detection failed\n");
+ /* boot loader init */
+ printf("boot loader init ...\n");
+ if(bl_init(&lpc)<0)
return -1;
- }
-
- /* tell bl that we are synchronized (it's allready in buf) */
- printf("sync sequence ...\n");
- len=14;
- txrx(tts_fd,buf,&len,info);
- if(strncmp(buf,"OK\r\n",4)) {
- printf("sync failed\n");
- return -1;
- }
-
- /* tell bl the crystal frequency */
-
- printf("frequency setting sequence ...\n");
- len=strlen(cfreq)+2;
- strncpy(buf,cfreq,BUFSIZE);
- buf[len-2]='\r';
- buf[len-1]='\n';
- txrx(tts_fd,buf,&len,info);
- if(strncmp(buf,"OK\r\n",4)) {
- printf("freq set failed\n");
- return -1;
+ /* quit if there is no hex file to process */
+ if(!(lpc.info&FIRMWARE)) {
+ printf("no firmware -> aborting\n");
+ goto end;
}
- /* read part id */
- printf("read part id ...\n");
- len=3;
- memcpy(buf,"J\r\n",3);
- txrx(tts_fd,buf,&len,info);
- buf[len]='\0';
- printf("part id: %d (0x%x)\n",atoi(buf),atoi(buf+3));
-
- /* read boot code version */
- printf("read boot code version ...\n");
- len=3;
- memcpy(buf,"K\r\n",3);
- txrx(tts_fd,buf,&len,info);
- buf[len]='\0';
- printf("boot code version: %c %c\n",(buf),atoi(buf));
-
+ /* open firmware file */
+ if(open_firmware(&lpc)<0)
+ goto end;
+ /* 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);
- // to be continued ... (parsing fw file and poking it to ram)
+ /* go! */
+ printf("go ...\n");
+ ret=go(&lpc);
end:
- close(tts_fd);
+ close(lpc.sfd);
+ close(lpc.fwfd);
return 0;
}
projects / my-code / arm.git / blobdiff