From 203e912166256906b85dfe2db43508c2d2a381d1 Mon Sep 17 00:00:00 2001
From: hackbard <hackbard@hackdaworld.org>
Date: Sun, 29 Jul 2007 22:03:07 +0200
Subject: [PATCH] added fwdump, basic data write implemented

---
 betty/fwdump.c  |  7 ++++
 betty/lpcload.c | 94 ++++++++++++++++++++++++++++++++++++++++---------
 2 files changed, 85 insertions(+), 16 deletions(-)

diff --git a/betty/fwdump.c b/betty/fwdump.c
index 6bb250a..3769508 100644
--- a/betty/fwdump.c
+++ b/betty/fwdump.c
@@ -6,3 +6,10 @@
  *
  */
 
+int main(int argc,char **argv) {
+
+
+
+	return 0;
+}
+
diff --git a/betty/lpcload.c b/betty/lpcload.c
index 8bd8530..7c2db70 100644
--- a/betty/lpcload.c
+++ b/betty/lpcload.c
@@ -19,7 +19,8 @@
 
 #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 CMD_SUCCESS		"0\r\n"
 #define INVALID_COMMAND		"1\r\n"
@@ -125,7 +126,7 @@ int open_firmware(t_lpc *lpc) {
 	return lpc->fwfd;
 }
 
-int txrx(t_lpc *lpc,char *buf,int len,u8 type) {
+int txrx(t_lpc *lpc,u8 *buf,int len,u8 type) {
 
 	int ret,cnt;
 	int i;
@@ -165,6 +166,11 @@ 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)
@@ -190,12 +196,11 @@ int txrx(t_lpc *lpc,char *buf,int len,u8 type) {
 	}
 	if(lpc->info&VERBOSE)
 		printf(" (%d)\n",cnt);
-	len=cnt;
 	buf[cnt]='\0';
 
 	/* check/strip return code if type is data */
 
-	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++)
@@ -213,7 +218,7 @@ int txrx(t_lpc *lpc,char *buf,int len,u8 type) {
 
 int bl_init(t_lpc *lpc) {
 
-	char buf[BUFSIZE];
+	u8 buf[BUFSIZE];
 	int len;
 
 	/* auto baud sequence */
@@ -247,10 +252,10 @@ int bl_init(t_lpc *lpc) {
 
 int read_part_id(t_lpc *lpc) {
 
-	char buf[BUFSIZE];
+	u8 buf[BUFSIZE];
 
 	memcpy(buf,"J\r\n",3);
-	txrx(lpc,buf,3,TXRX_TYPE_DATA);
+	txrx(lpc,buf,3,TXRX_TYPE_CMD);
 	lpc->partid=atoi(buf);
 
 	return lpc->partid;
@@ -258,11 +263,11 @@ int read_part_id(t_lpc *lpc) {
 
 int read_bcv(t_lpc *lpc) {
 
-	char buf[BUFSIZE];
+	u8 buf[BUFSIZE];
 	char *ptr;
 
 	memcpy(buf,"K\r\n",3);
-	txrx(lpc,buf,3,TXRX_TYPE_DATA);
+	txrx(lpc,buf,3,TXRX_TYPE_CMD);
 	ptr=strtok(buf,"\r\n");
 	lpc->bcv[0]=strtol(ptr,NULL,16);
 	ptr=strtok(NULL,"\r\n");
@@ -271,7 +276,7 @@ int read_bcv(t_lpc *lpc) {
 	return 0;
 }
 
-int uuencode(char *in,char *out) {
+int uuencode(u8 *in,u8 *out) {
 
 	out[0]=0x20+((in[0]>>2)&0x3f);
 	out[1]=0x20+(((in[0]<<4)|(in[1]>>4))&0x3f);
@@ -281,27 +286,84 @@ int uuencode(char *in,char *out) {
 	return 0;
 }
 
-int write_to_ram(t_lpc *lpc,char *buf,int addr,int len) {
+int write_to_ram(t_lpc *lpc,u8 *buf,int addr,int len) {
 
 	int lcount;
 	u8 checksum;
+	u8 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) {
+	/* make it a multiple of 3 (reason: uuencode) */
+	nlen=(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 write command */
+	snprintf(txrxbuf,BUFSIZE,"W %d %d",addr,len);
+	slen=strlen(txrxbuf);
+	txrxbuf[slen]='\r';
+	txrxbuf[slen+1]='\0';
+	slen+=2;
+
+	/* 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;
+	bcnt=0;
+	count=0;
+	checksum=0;
+	while(bcnt<nlen) {
+
+		/* uuencode / prepare data bytes */
+		uuencode(buf+bcnt,txrxbuf);
+		txrxbuf[4]='\0';
+		txrxbuf[5]='\0';
+
+		/* checksum */
+		checksum+=(buf[0]+buf[1]+buf[2]);
+
+		/* send a data line */
+		txrx(lpc,txrxbuf,6,TXRX_TYPE_DATA);
+
+		/* increase counters */
+		lcount+=1;
+		bcnt+=3;
+		count+=3;
+
+		/* checksum */
 		if(!(lcount%20)) {
 			/* send checksum */
-			if(lcount!=0) {
-				
+			txrxbuf[0]=checksum;
+			txrx(lpc,txrxbuf,1,TXRX_TYPE_CMD);
+			if(!strncmp(txrxbuf,"RESEND\r\n",8)) {
+				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;
-- 
2.20.1