X-Git-Url: https://hackdaworld.org/gitweb/?p=my-code%2Farm.git;a=blobdiff_plain;f=betty%2Flpcload.c;h=0bf3006aa7dd262c3ce0872bd309cd7e4c1626ed;hp=ff78d967950474371f8fec874cc217770a690891;hb=f549db2020c9e68e37e89f3cb7a921e5a7f75954;hpb=06e719791011a2c8eb472943492b7b0b6d445c6f

diff --git a/betty/lpcload.c b/betty/lpcload.c
index ff78d96..0bf3006 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");
@@ -271,6 +276,126 @@ int read_bcv(t_lpc *lpc) {
 	return 0;
 }
 
+int uuencode(u8 *in,u8 *out) {
+
+	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);
+
+	return 0;
+}
+
+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;
+	}
+
+	/* 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 */
+			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 & counter */
+			checksum=0;
+			count=0;
+		}
+
+	}
+
+	return 0;
+}
+
+int firmware_to_ram(t_lpc *lpc) {
+
+	char line[BUFSIZE];
+	char buf[BUFSIZE];
+
+	/* read file */
+	while(ret) {
+		/* read line */
+		while(ret) {
+			ret=read(lpc->fwfd,line,1);
+			if(line[0]!=':') {
+				printf("fw to ram: no ihex format\n");
+				return -1;
+			}
+			ret=read(lpc->fwfd,line+1,2);
+			line[3]='\0';
+			len=atoi(line+1);
+			ret=read(lpc->fwfd,line+3,4);
+			line[7]='\0';
+			addr=strtol(line+3);
+
+		}
+	}
+
+	return 0;
+}
+
 int main(int argc,char **argv) {
 
 	t_lpc lpc;
@@ -314,7 +439,8 @@ int main(int argc,char **argv) {
 	}
 
 	/* open serial port */
-	open_serial_device(&lpc);
+	if(open_serial_device(&lpc)<0)
+		goto end;
 
 	/* boot loader init */
 	printf("boot loader init ...\n");
@@ -329,9 +455,13 @@ int main(int argc,char **argv) {
 	printf("boot code version: %02x %02x\n",lpc.bcv[0],lpc.bcv[1]);
 
 	// to be continued ... (parsing fw file and poking it to ram)
+	if(open_firmware(&lpc)<0)
+		goto end;
+	firmware_to_ram(&lpc);
 
-//end:
+end:
 	close(lpc.sfd);
+	close(lpc.fwfd);
 
 	return 0;
 }