From: hackbard <hackbard@staubsauger.localdomain>
Date: Sat, 4 Aug 2007 22:05:53 +0000 (+0200)
Subject: firmware upload to ram possible
X-Git-Url: https://hackdaworld.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=14acad803dec0c6e18b1825f2b84e9bbcd409554;p=my-code%2Farm.git

firmware upload to ram possible
---

diff --git a/betty/lpcload.c b/betty/lpcload.c
index 905ebbd..6ec1186 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>
@@ -56,8 +58,6 @@ 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;
@@ -110,8 +110,8 @@ int open_serial_device(t_lpc *lpc) {
 	// input options -> enable flow control
 	
 	//term.c_iflag&=~(IXON|IXOFF|IXANY|INLCR|ICRNL);
-	term.c_iflag&=~(INLCR|ICRNL);
-	term.c_iflag|=(IXON|IXOFF|IXANY);
+	term.c_iflag&=~(INLCR|ICRNL|IXANY);
+	term.c_iflag|=(IXON|IXOFF);
 
 	// more control options -> timeout / flow control
 	
@@ -184,79 +184,68 @@ int txrx(t_lpc *lpc,char *buf,int len,u8 type) {
 	/* cut the echo if not of type auto baud */
 
 	if(type!=TXRX_TYPE_BAUD) {
-		while(cnt>0) {
+		while(cnt) {
 			ret=read(lpc->sfd,buf,cnt);
 			if(ret<0) {
 				perror("txrx echo cut");
 				return ret;
 			}
-			if(type==TXRX_TYPE_CKSM) {
-				printf("   cksm resp: ");
-				for(i=0;i<ret;i++)
-					printf("%02x ",buf[i]);
-				printf("\n");
-			}
-			for(i=0;i<ret;i++) {
-				if(buf[i]==0x13)
-					printf("STOP !!!\n");
-			}
 			cnt-=ret;
 		}
 	}
 
 	/* return here if type is data */
 
-	if(type==TXRX_TYPE_DATA) {
-		ret=1;
-		while(ret) {
-			ret=read(lpc->sfd,buf,BUFSIZE);
-			for(i=0;i<ret;i++) {
-				if(buf[i]!='\n') {
-					printf("FATAL!!!\n");
-					int j;
-					for(j=0;j<ret;j++) printf("%02x ",buf[j]);
-					printf("\n");
-				}
-			}
-		}
+	if(type==TXRX_TYPE_DATA)
 		return cnt;
-	}
-
-	/* wait, if cksum has to be verified */
-	
-	//if(type==TXRX_TYPE_CKSM)
-	//	sleep(3);
 
 	/* 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) {
-		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("  << ");
+		for(i=0;i<cnt+1;i++)
+			printf("%c",((buf[i]>0x19)&(buf[i]<0x7f))?
+			            buf[i]:'.');
 		printf(" | ");
-		for(i=0;i<cnt;i++)
+		for(i=0;i<cnt+1;i++)
 			printf("%02x ",buf[i]);
-		printf("| (%d)\n",cnt);
+		printf("| (%d)\n",cnt+1);
 	}
-	buf[cnt]='\0';
+	buf[cnt+1]='\0';
 
 	/* check/strip return code if type is cmd */
 
@@ -284,7 +273,7 @@ int bl_init(t_lpc *lpc) {
 	/* auto baud sequence */
 	buf[0]='?';
 	txrx(lpc,buf,1,TXRX_TYPE_BAUD);
-	if(strncmp(buf,"Synchronized",12)) {
+	if(strncmp(buf,"Synchronized\r\n",14)) {
 		printf("auto baud detection failed\n");
 		return -1;
 	}
@@ -310,32 +299,6 @@ int bl_init(t_lpc *lpc) {
 	return 0;
 }
 
-int read_part_id(t_lpc *lpc) {
-
-	char buf[BUFSIZE];
-
-	memcpy(buf,"J\r\n",3);
-	txrx(lpc,buf,3,TXRX_TYPE_CMD);
-	lpc->partid=atoi(buf);
-
-	return lpc->partid;
-}
-
-int read_bcv(t_lpc *lpc) {
-
-	char buf[BUFSIZE];
-	char *ptr;
-
-	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);
-
-	return 0;
-}
-
 int unlock_go(t_lpc *lpc) {
 
 	char buf[BUFSIZE];
@@ -359,22 +322,13 @@ int go(t_lpc *lpc) {
 	return ret;
 }
 
-int uuencode(char *in,char *out) {
-
-	int i;
-
-	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);
+int uuencode(u8 *in,u8 *out,int len) {
 
-	printf("  enc: ");
-	for(i=0;i<3;i++)
-		printf("%02x ",in[i]);
-	printf("-> ");
-	for(i=0;i<4;i++)
-		printf("%02x ",out[i]);
-	printf("\n");
+	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;
 }
@@ -413,10 +367,6 @@ int write_to_ram(t_lpc *lpc,char *buf,u32 addr,int len) {
 
 	/* 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;
@@ -426,13 +376,12 @@ int write_to_ram(t_lpc *lpc,char *buf,u32 addr,int len) {
 	while(bcnt<nlen) {
 
 		/* uuencode / prepare data bytes */
-		uuencode(buf+bcnt,txrxbuf);
-		txrxbuf[4]='\r';
-		txrxbuf[5]='\n';
+		uuencode((u8 *)(buf+bcnt),(u8 *)(txrxbuf),bcnt==nlen-3?len%3:3);
+		txrxbuf[5]='\r';
+		txrxbuf[6]='\n';
 
 		/* checksum */
-		checksum+=(buf[bcnt]+buf[bcnt+1]+buf[bcnt+2]);
-		printf("----> %d %d\n",checksum,bcnt);
+		checksum+=((u8)buf[bcnt]+(u8)buf[bcnt+1]+(u8)buf[bcnt+2]);
 
 		/* send a data line */
 		txrx(lpc,txrxbuf,6,TXRX_TYPE_DATA);
@@ -444,11 +393,15 @@ int write_to_ram(t_lpc *lpc,char *buf,u32 addr,int len) {
 
 		/* 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%0x100);
+			snprintf(txrxbuf,BUFSIZE,"%d\r\n",checksum);
 			slen=strlen(txrxbuf);
 			txrx(lpc,txrxbuf,slen,TXRX_TYPE_CKSM);
-			if(!strncmp(txrxbuf,"RESEND\r\n",8)) {
+			if(!strncmp(txrxbuf,"RESE",4)) {
+				read(lpc->sfd,txrxbuf+4,4);
 				printf("ram write: resending ...\n");
 				bcnt-=count;
 			}
@@ -470,9 +423,10 @@ int firmware_to_ram(t_lpc *lpc) {
 
 	char buf[BUFSIZE];
 	u32 addr,len,type;
-	int ret;
+	int ret,temp;
 
 	/* read a line */
+	ret=1;
 	while(ret) {
 		/* sync line */
 		ret=read(lpc->fwfd,buf,1);
@@ -504,14 +458,16 @@ int firmware_to_ram(t_lpc *lpc) {
 		/* 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 */
-		ret=read(lpc->fwfd,buf,2);
+		for(ret=0;ret<len;ret++) {
+			sscanf(buf+2*ret,"%02x",&temp);
+			buf[ret]=temp;
+		}
 		/* act according to type */
 		switch(type) {
 			case 0x03:
@@ -585,15 +541,8 @@ int main(int argc,char **argv) {
 	if(bl_init(&lpc)<0)
 		return -1;
 
-	/* read part id */
-	read_part_id(&lpc);
-	printf("part id: %d\n",lpc.partid);
-
-	/* read boot code version */
-	read_bcv(&lpc);
-	printf("boot code version: %02x %02x\n",lpc.bcv[0],lpc.bcv[1]);
-
 	/* parse intel hex file and write to ram */
+	printf("write firmware to ram ...\n");
 	firmware_to_ram(&lpc);
 
 	/* unlock go cmd */