X-Git-Url: https://hackdaworld.org/gitweb/?a=blobdiff_plain;f=betty%2Flpcload.c;h=0d2f9c85ddd9bfd9f5394c556a38ee666d707aa8;hb=feece393fb07514608a7ad21eaa376ea3375e945;hp=8bd853010f225979c073ad24a3d5aaa630b693f6;hpb=e98e1b46f919aaa0eadb3a74ada0e4f6220a589c;p=my-code%2Farm.git

diff --git a/betty/lpcload.c b/betty/lpcload.c
index 8bd8530..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>
@@ -19,7 +21,9 @@
 
 #define TXRX_TYPE_BAUD		0x01
 #define TXRX_TYPE_SYNC		0x02
-#define TXRX_TYPE_DATA		0x03
+#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"
@@ -39,10 +43,13 @@
 #define INVALID_STOP_BIT	"18\r\n"
 
 #define CRYSTFREQ		"10000"
+#define RAMOFFSET		0x40000200
 
-#define BUFSIZE			64
+#define BUFSIZE			128
 
 typedef unsigned char u8;
+typedef unsigned short u16;
+typedef unsigned int u32;
 
 typedef struct s_lpc {
 	int sfd;		/* serial fd */
@@ -51,8 +58,8 @@ typedef struct s_lpc {
 	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;
 
 void usage(void) {
@@ -61,6 +68,7 @@ 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");
 
 }
@@ -99,14 +107,18 @@ int open_serial_device(t_lpc *lpc) {
 	
 	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);
 
-	// 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);
 
@@ -115,6 +127,9 @@ int open_serial_device(t_lpc *lpc) {
 
 int open_firmware(t_lpc *lpc) {
 
+	int ret;
+	char buf[BUFSIZE];
+
 	/* open firmware file */
 
 	lpc->fwfd=open(lpc->fwfile,O_RDONLY);
@@ -122,6 +137,16 @@ int open_firmware(t_lpc *lpc) {
 	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;
 }
 
@@ -149,8 +174,12 @@ int txrx(t_lpc *lpc,char *buf,int len,u8 type) {
 		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 */
 
@@ -165,37 +194,62 @@ int txrx(t_lpc *lpc,char *buf,int len,u8 type) {
 		}
 	}
 
+	/* return here if type is data */
+
+	if(type==TXRX_TYPE_DATA)
+		return cnt;
+
 	/* 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);
-	len=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';
 
-	/* check/strip return code if type is data */
+	/* check/strip return code if type is cmd */
 
-	if(type==TXRX_TYPE_DATA) {
+	if(type==TXRX_TYPE_CMD) {
 		ret=strlen(CMD_SUCCESS);
 		if(!strncmp(buf,CMD_SUCCESS,ret)) {
 			for(i=ret;i<cnt;i++)
@@ -245,63 +299,122 @@ int bl_init(t_lpc *lpc) {
 	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_DATA);
-	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_DATA);
-	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_CMD);
 
-	return 0;
+	return ret;
 }
 
-int uuencode(char *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,char *buf,int addr,int len) {
+int write_to_ram(t_lpc *lpc,char *buf,u32 addr,int len) {
 
 	int lcount;
-	u8 checksum;
+	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;
 	}
 
-	while(1) {
-		if(!(lcount%20)) {
+	/* 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 */
-			if(lcount!=0) {
-				
+			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 */
+			/* reset checksum & counter */
 			checksum=0;
+			count=0;
 		}
 
-		lcount+=1;
 	}
 
 	return 0;
@@ -309,7 +422,66 @@ int write_to_ram(t_lpc *lpc,char *buf,int addr,int len) {
 
 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;
 }
@@ -325,6 +497,7 @@ int main(int argc,char **argv) {
 
 	memset(&lpc,0,sizeof(t_lpc));
 	strncpy(lpc.freq,CRYSTFREQ,7);
+	lpc.roff=RAMOFFSET;
 
 	/* parse argv */
 
@@ -360,22 +533,27 @@ int main(int argc,char **argv) {
 	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");
-	bl_init(&lpc);
+	if(bl_init(&lpc)<0)
+		return -1;
 
-	/* read part id */
-	read_part_id(&lpc);
-	printf("part id: %d\n",lpc.partid);
+	/* parse intel hex file and write to ram */
+	printf("write firmware to ram ...\n");
+	firmware_to_ram(&lpc);
 
-	/* read boot code version */
-	read_bcv(&lpc);
-	printf("boot code version: %02x %02x\n",lpc.bcv[0],lpc.bcv[1]);
+	/* unlock go cmd */
+	printf("unlock go command ...\n");
+	unlock_go(&lpc);
 
-	// to be continued ... (parsing fw file and poking it to ram)
-	if(open_firmware(&lpc)<0)
-		goto end;
-	firmware_to_ram(&lpc);
+	/* go! */
+	printf("go ...\n");
+	go(&lpc);
+	printf("\n");
 
 end:
 	close(lpc.sfd);