X-Git-Url: https://hackdaworld.org/gitweb/?a=blobdiff_plain;f=betty%2Flpcload.c;h=0d2f9c85ddd9bfd9f5394c556a38ee666d707aa8;hb=feece393fb07514608a7ad21eaa376ea3375e945;hp=bdb39482c205ae97db92a3a89c7b7f6b760e0e12;hpb=a2e8f16f2d595f007ebf1bfe041927702e161c9c;p=my-code%2Farm.git

diff --git a/betty/lpcload.c b/betty/lpcload.c
index bdb3948..0d2f9c8 100644
--- a/betty/lpcload.c
+++ b/betty/lpcload.c
@@ -1,8 +1,10 @@
 /*
  * 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>
@@ -14,12 +16,51 @@
 #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_BAUD		0x01
+#define TXRX_TYPE_SYNC		0x02
+#define TXRX_TYPE_CMD		0x03
+#define TXRX_TYPE_DATA		0x04
+#define TXRX_TYPE_CKSM		0x05
+
+#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 hoff;		/* start addr of ihex file */
+	u32 roff;		/* ram offset of uc */
+} t_lpc;
 
 void usage(void) {
 
@@ -27,92 +68,436 @@ 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,B9600);
+	cfsetospeed(&term,B9600);
+
+	// 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);
+
+	// 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) {
+
+	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;
+}
+
+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;
+		}
+	}
+
+	/* return here if type is data */
 
-	/* cut the echo */
-	// add more checking here!
-	while(cnt)
-		cnt-=read(fd,buf,cnt);
+	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';
+
+	/* 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_CMD);
+
+	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-lpc->hoff);
+
+	/* 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:
+				write_to_ram(lpc,buf,addr,len);
+				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;
 
 	/*
 	 * 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 */
 
@@ -125,17 +510,17 @@ int main(int argc,char **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();
@@ -144,106 +529,35 @@ int main(int argc,char **argv) {
 
 	}
 
-	/*
-	 * 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);
+	/* open serial port */
+	if(open_serial_device(&lpc)<0)
+		goto end;
 
-	// input/output baudrate
-
-	cfsetispeed(&term,B9600);
-	cfsetospeed(&term,B9600);
+	/* open firmware file */
+	if(open_firmware(&lpc)<0)
+		goto end;
 
-	// 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 -> 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");
-		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");
+	/* boot loader init */
+	printf("boot loader init ...\n");
+	if(bl_init(&lpc)<0)
 		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;
-	}
-
-	/* 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));
-
 
+	/* 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");
+	go(&lpc);
+	printf("\n");
 
 end:
-	close(tts_fd);
+	close(lpc.sfd);
+	close(lpc.fwfd);
 
 	return 0;
 }