From: hackbard <hackbard@staubsauger.localdomain>
Date: Sat, 28 Jul 2007 02:19:33 +0000 (+0200)
Subject: added lpcload tool to upload firmware into lpc2220 ram vi uart0
X-Git-Url: https://hackdaworld.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f99ed5c4faba98f0afda8d3f90d0481fc70258ee;p=my-code%2Farm.git

added lpcload tool to upload firmware into lpc2220 ram vi uart0
---

diff --git a/betty/lpcload.c b/betty/lpcload.c
new file mode 100644
index 0000000..e2bef73
--- /dev/null
+++ b/betty/lpcload.c
@@ -0,0 +1,227 @@
+/*
+ * lpcload.c - load firmware into ram of lpc2220 via uart0
+ *
+ * author: hackbard@hackdaworld.org
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <termios.h>
+
+#define VERBOSE		(1<<0)
+#define FIRMWARE	(1<<1)
+
+#define CRYSTFREQ	"10000"
+
+#define BUFSIZE		64
+
+void usage(void) {
+
+	printf("possible argv:\n");
+	printf("  -d <serial device>\n");
+	printf("  -f <firmware>\n");
+	printf("  -c <crystal freq>\n");
+	printf("  -v\n");
+
+}
+
+int txrx(int fd,char *buf,int *len,unsigned char v) {
+
+	int ret,cnt;
+	int i;
+
+	/* write */
+
+	if(v&VERBOSE)
+		printf("  >> ");
+	cnt=0;
+	while(*len) {
+		ret=write(fd,buf+cnt,*len);
+		if(ret<0) {
+			perror("txrx write");
+			return ret;
+		}
+		if(v&VERBOSE)
+			for(i=0;i<ret;i++)
+				printf("%c",
+				       ((buf[cnt+i]>0x19)&(buf[cnt+i]<0x7f))?
+				       buf[cnt+i]:'.');
+		*len-=ret;
+		cnt+=ret;
+	}
+	if(v&VERBOSE)
+		printf(" (%d)\n",cnt);
+
+	/* cut the echo */
+	// add more checking here!
+	while(cnt)
+		cnt-=read(fd,buf,cnt);
+
+	/* read */
+
+	if(v&VERBOSE)
+		printf("  << ");
+	ret=1;
+	cnt=0;
+	while(ret>0) {
+		ret=read(fd,buf+cnt,BUFSIZE-cnt);
+		if(ret<0) {
+			perror("txrx read");
+			return ret;
+		}
+		if(ret+cnt>BUFSIZE) {
+			printf("txrx read: too small buf size (%d)!\n",BUFSIZE);
+			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 i;
+	char tts[128];
+	int tts_fd;
+	char fw[128];
+	int fw_fd;
+	unsigned char info;
+	struct termios term;
+	char cfreq[8];
+	int len;
+	char buf[BUFSIZE];
+
+	/*
+	 * initial ... 
+	 */
+
+	info=0;
+	memset(&term,0,sizeof(struct termios));
+	strncpy(cfreq,CRYSTFREQ,7);
+
+	/* parse argv */
+
+	for(i=1;i<argc;i++) {
+
+		if(argv[i][0]!='-') {
+			usage();
+			return -1;
+		}
+
+		switch(argv[i][1]) {
+			case 'd':
+				strncpy(tts,argv[++i],127);
+				break;
+			case 'f':
+				strncpy(fw,argv[++i],127);
+				info|=FIRMWARE;
+				break;
+			case 'v':
+				info|=VERBOSE;
+				break;
+			case 'c':
+				strncpy(cfreq,argv[++i],7);
+				break;
+			default:
+				usage();
+				return -1;
+		}
+
+	}
+
+	/*
+	 * 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);
+
+	// 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 -> 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 */
+
+	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) */
+	len=14;
+	txrx(tts_fd,buf,&len,info);
+	if(strncmp(buf,"OK\r\n",4)) {
+		printf("sync failed\n");
+		return -1;
+	}
+
+	/* tell bl the crystal frequency */
+	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;
+	}
+
+
+	// to be continued ... (parsing fw file and poking it to ram)
+
+end:
+	close(tts_fd);
+
+	return 0;
+}
+
diff --git a/betty/readme b/betty/readme
index c95b57c..bd8d4a8 100644
--- a/betty/readme
+++ b/betty/readme
@@ -4,6 +4,8 @@ the betty tv project
 contents:
 ---------
 
+* lpcload.c - loads firmware to the lpc2220 via uart0
+
 * betty.c - replacement firmware for the betty tv remote