lpc111x-isp/lpc111x.c: read and dump (to stdout) the entire Flash

lpc111x-isp/lpc111x.c

@@ -31,7 +31,8 @@
 #define	HOST_RX		TGT_TX
 #define	HOST_TX		TGT_RX
 
-#define	MAX_BUF		10000
+#define	MAX_BUF		10000	/* receive buffer */
+#define	MAX_RECORD	45	/* data bytes per uuencoded record */
 #define	AUTOBAUD_TRIES	10
 #define	SYNC		"Synchronized"
 
@@ -47,18 +48,18 @@ static void trace(const char *label, const uint8_t *s, int len)
 	const uint8_t *end = s+len;
 
 	if (label)
-		printf("%s ", label);
+		fprintf(stderr, "%s ", label);
 	for (end = s+len; s != end; s++) {
 		if (*s >= ' ' && *s <= '~')
-			printf("%c", *s);
+			fprintf(stderr, "%c", *s);
 		else if (*s == 10)
-			printf("\\n");
+			fprintf(stderr, "\\n");
 		else if (*s == 13)
-			printf("\\r");
+			fprintf(stderr, "\\r");
 		else
-			printf("\\%02o", *s);
+			fprintf(stderr, "\\%02o", *s);
 	}
-	printf("\n");
+	fprintf(stderr, "\n");
 }
 
 
@@ -127,7 +128,7 @@ static const char *dialog_fixed(int idle, const char *msg)
 			fprintf(stderr, "\\r without \\n\n");
 			exit(1);
 		}
-		if (*s == '\n' && !s[1])
+		if (*s == '\n' && s+1 == rx_buf+got)
 			break;
 		*t++ = *s;
 	}
@@ -256,6 +257,107 @@ static void identify(void)
 }
 
 
+/* ----- Flash dump -------------------------------------------------------- */
+
+
+/* AN11229 */
+
+
+static uint8_t uudchar(char c)
+{
+	if (c <= 0x20 && c > 0x60) {
+		fprintf(stderr, "invalid UU character '%c'\n", c);
+		exit(1);
+	}
+	return c == 0x60 ? 0 : c-32;
+}
+
+
+static int uudecode(const char *s, uint8_t *buf)
+{
+	int len, uu_len;
+	const char *nl;
+	const uint8_t *end;
+
+	len = *s-32;
+	if (len < 0 || len > MAX_RECORD) {
+		fprintf(stderr, "invalid UU length (%d)\n", len);
+		exit(1);
+	}
+	nl = strchr(++s, '\n');
+	if (!nl) {
+		fprintf(stderr, "no \\n at end of UU record\n");
+		exit(1);
+	}
+	uu_len = nl-s;
+	if (uu_len & 3) {
+		fprintf(stderr, "UU length %d not a multiple of 4\n", uu_len);
+		exit(1);
+	}
+	if ((len+2)/3 != uu_len/4) {
+		fprintf(stderr, "UU length %d vs. %d bytes (\"%.*s\")\n",
+		    uu_len, len, nl-s+1, s-1);
+		exit(1);
+	}
+
+	end = buf+len;
+	while (buf != end) {
+		unsigned tmp = uudchar(s[0]) << 18 | uudchar(s[1]) << 12 |
+		    uudchar(s[2]) << 6 | uudchar(s[3]);
+
+		*buf++ = tmp >> 16;
+		if (buf != end)
+			*buf++ = tmp >> 8;
+		if (buf != end)
+			*buf++ = tmp;
+		s += 4;
+	}
+	return len;
+}
+
+
+static void dump(void)
+{
+	int addr = 0, end;
+	unsigned sum = 0, check;
+	const char *res, *nl;
+	int got, wrote, i;
+
+	end = device->flash_kb << 10;
+	res = dialog_rc(100, "R 0 %u", end);
+	while (addr != end) {
+		while (1) {
+			uint8_t buf[MAX_RECORD];
+
+			nl = strchr(res, '\n');
+			if (!nl)
+				break;
+			got = uudecode(res, buf);
+			for (i = 0; i != got; i++)
+				sum += buf[i];
+			wrote = fwrite(buf, 1, got, stdout);
+			if (wrote != got) {
+				perror("fwrite");
+				exit(1);
+			}
+			addr += got;
+			res = nl+1;
+		}
+		if (sscanf(res, "%u", &check) != 1) {
+			fprintf(stderr, "can't parse checksum \"%s\"\n", res);
+			exit(1);
+		}
+		if (check != sum) {
+			fprintf(stderr, "checksum error: got %u received %u\n",
+			    sum, check);
+			exit(1);
+		}
+		res = dialog(100, "OK");
+		sum = 0;
+	}
+}
+
+
 /* ----- ISP session ------------------------------------------------------- */
 
 
@@ -347,5 +449,7 @@ int main(int argc, char **argv)
 
 	identify();
 
+	dump();
+
 	return 0;
 }