Implement PBM read file and display

crc16ccitt.c

@@ -1,5 +1,5 @@
 /*
- * derived from crctester.c
+ * derived from crctester.c 2011 by Nils Faerber <nils.faerber@kernelconcepts.de>
  * original header:
  * ----------------------------------------------------------------------------
  * CRC tester v1.3 written on 4th of February 2003 by Sven Reifegerste (zorc/reflex)
@@ -100,12 +100,19 @@ static unsigned long crctablefast (unsigned char* p, unsigned long len)
 
 	unsigned long crc = crcinit_direct;
 
-	if (refin) crc = reflect(crc, order);
+	if (refin)
+		crc = reflect(crc, order);
 
-	if (!refin) while (len--) crc = (crc << 8) ^ crctab[ ((crc >> (order-8)) & 0xff) ^ *p++];
+	if (!refin)
-	else while (len--) crc = (crc >> 8) ^ crctab[ (crc & 0xff) ^ *p++];
+		while (len--)
+			crc = (crc << 8) ^ crctab[ ((crc >> (order-8)) & 0xff) ^ *p++];
+	else
+		while (len--)
+			crc = (crc >> 8) ^ crctab[ (crc & 0xff) ^ *p++];
+
+	if (refout^refin)
+		crc = reflect(crc, order);
 
-	if (refout^refin) crc = reflect(crc, order);
 	crc^= crcxor;
 	crc&= crcmask;
 
@@ -114,8 +121,8 @@ static unsigned long crctablefast (unsigned char* p, unsigned long len)
 
 static unsigned long crctable (unsigned char* p, unsigned long len)
 {
-	// normal lookup table algorithm with augmented zero bytes.
+	/* normal lookup table algorithm with augmented zero bytes. */
-	// only usable with polynom orders of 8, 16, 24 or 32.
+	/* only usable with polynom orders of 8, 16, 24 or 32. */
 
 	unsigned long crc = crcinit_nondirect;
 
@@ -138,6 +145,7 @@ static unsigned long crctable (unsigned char* p, unsigned long len)
 
 	if (refout^refin)
 		crc = reflect(crc, order);
+
 	crc^= crcxor;
 	crc&= crcmask;
 
@@ -148,8 +156,8 @@ static unsigned long crctable (unsigned char* p, unsigned long len)
 
 unsigned long crcbitbybit(unsigned char* p, unsigned long len) {
 
-	// bit by bit algorithm with augmented zero bytes.
+	/* bit by bit algorithm with augmented zero bytes. */
-	// does not use lookup table, suited for polynom orders between 1...32.
+	/* does not use lookup table, suited for polynom orders between 1...32. */
 
 	unsigned long i, j, c, bit;
 	unsigned long crc = crcinit_nondirect;
@@ -179,6 +187,7 @@ unsigned long crcbitbybit(unsigned char* p, unsigned long len) {
 
 	if (refout)
 		crc=reflect(crc, order);
+
 	crc ^= crcxor;
 	crc &= crcmask;
 
@@ -365,3 +374,4 @@ int main() {
 	return(0);
 }
 #endif
+

metawatch.c

@@ -1,8 +1,9 @@
 /*
- * (c) 2011 Siegen, Germany by Nils Faerber
+ * (c) 2011 Siegen, Germany by Nils Faerber <nils.faerber@kernelconcepts.de>
  *
  * license LGPL
  */
+
 #include <stdio.h>
 #include <sys/types.h>
 #include <sys/stat.h>
@@ -12,6 +13,7 @@
 #include <string.h>
 #include <time.h>
 #include <termios.h>
+#include <ctype.h>
 
 #include "metawatch_protocol.h"
 #include "crc16ccitt.h"
@@ -47,7 +49,9 @@ int mw_send_frame(int mw_fd, unsigned char msg_type, unsigned char options, unsi
 	crc = crc16ccitt(frame, len+4);
 	*(unsigned short *)(frame+len+4) = crc;
 
+#ifdef DEBUG
 	dump_frame(frame, tlen);
+#endif
 
 	while (((ret = write(mw_fd, frame, tlen)) >= 0) && (tlen > 0))
 		tlen -= ret;
@@ -107,12 +111,12 @@ void mw_configure_watch_mode(int mw_fd, unsigned char mode, unsigned char save,
 
 	mdata[0] = timeout; /* seconds */
 	mdata[1] = invert; /* 0=normal, 1=invert */
-	mw_send_frame(mw_fd, MW_CONFIGURE_MODE, (mode & 0x0f) | ((save & 0x01) << 3), mdata, 2);
+	mw_send_frame(mw_fd, MW_CONFIGURE_MODE, (mode & 0x0f) | ((save & 0x01) << 4), mdata, 2);
 }
 
 void mw_update_display(int mw_fd, unsigned char mode, unsigned char copy)
 {
-	mw_send_frame(mw_fd, MW_UPDATE_DISPLAY, (mode & 0x0f) | ((copy & 0x01) << 3), NULL, 0);
+	mw_send_frame(mw_fd, MW_UPDATE_DISPLAY, (mode & 0x0f) | ((copy & 0x01) << 4), NULL, 0);
 }
 
 void mw_load_template(int mw_fd, unsigned char mode, unsigned char template_select)
@@ -125,7 +129,7 @@ void mw_load_template(int mw_fd, unsigned char mode, unsigned char template_sele
  */
 void mw_write_buffer(int mw_fd,
 		unsigned char mode,
-		unsigned char numlines,		/* number of lines, 0 or 1 */
+		unsigned char numlines,		/* number of lines, 0=two lines or 1=one line */
 		unsigned char row_offset,	/* start at row_offset in display, e.g. lower part in idle @31 */
 		unsigned char *buffer, int buflen)
 {
@@ -139,11 +143,11 @@ void mw_write_buffer(int mw_fd,
 	memset(mdata, 0, 32);
 	mdata[0] = row_offset;
 	memcpy((mdata+1), buffer, 12);
-	if (numlines == 1) {
+	if (numlines == 0) {
-		mdata[0] = row_offset+1;
+		mdata[13] = row_offset+1;
-		memcpy((mdata+13), (buffer+12), 12);
+		memcpy((mdata+14), (buffer+12), 12);
 	};
-	mw_send_frame(mw_fd, MW_WRITE_BUFFER, (mode & 0x0f) | (((numlines & 0x01)<< 3) & 0x10), mdata, numlines ? 13 : 26);
+	mw_send_frame(mw_fd, MW_WRITE_BUFFER, (mode & 0x0f) | (((numlines & 0x01)<< 4) & 0x10), mdata, numlines ? 13 : 26);
 }
 
 
@@ -187,6 +191,11 @@ void mw_get_battery_voltage_response(int mw_fd, unsigned char *batrsp, int len)
 	fprintf(stderr, "battery is at %dV, %s and %s\n", voltage, power_good ? "power is good" : "power fault", bat_charging ? "charging" : "not charging");
 }
 
+void mw_status_change_event(int mw_fd, unsigned char option, unsigned char *statrsp, int len)
+{
+	fprintf(stderr, "Status change event for mode %s: %s\n", mw_screen_mode_names[option&0x0f], mw_status_string[statrsp[0]]);	
+}
+
 /* ---------------------------------------------------------------------- */
 
 int decode_frame(int mw_fd, unsigned char *buf, int len)
@@ -232,6 +241,9 @@ int decode_frame(int mw_fd, unsigned char *buf, int len)
 		case MW_LOW_BATTERY_BT_OFF_MSG:
 			fprintf(stderr, "Watch battery extremely low - radio will turn off\n");
 			break;
+		case MW_STATUS_CHANGE_EVENT:
+			mw_status_change_event(mw_fd, msgopt, msgdata, len-4-2);
+			break;
 		default:
 			fprintf(stderr, "Unkown msgtype 0x%02x\n", msgtype);
 			break;
@@ -241,6 +253,109 @@ int decode_frame(int mw_fd, unsigned char *buf, int len)
 }
 
 
+void bitmap_test(int mw_fd)
+{
+	/* a nice checker-board pattern */
+	unsigned char checkbuf[24] = {
+		0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+		0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+		0x55, 0x55, 0x55, 0x55, 0x55, 0x55,
+		0x55, 0x55, 0x55, 0x55, 0x55, 0x55,
+	};
+	mw_write_buffer(mw_fd, MW_SCREEN_MODE_IDLE, 0, 31, checkbuf, 24);
+	mw_write_buffer(mw_fd, MW_SCREEN_MODE_IDLE, 0, 33, checkbuf, 24);
+	mw_write_buffer(mw_fd, MW_SCREEN_MODE_IDLE, 0, 35, checkbuf, 24);
+	mw_write_buffer(mw_fd, MW_SCREEN_MODE_IDLE, 0, 37, checkbuf, 24);
+
+	mw_update_display(mw_fd, MW_SCREEN_MODE_IDLE, 1);
+}
+
+
+void flip_buffer_bytes(unsigned char invert, unsigned char *buf, int len)
+{
+	int i;
+	unsigned char tmp;
+
+	while (len--) {
+		tmp = 0;
+		for (i=0; i<8; i++)
+			tmp |= ((*buf & (1<<i)) >> i) << (7-i);
+		// fprintf(stderr, "0x%02x -> 0x%02x\n", *buf, tmp);
+		*buf = invert ? ~tmp : tmp;
+		buf++;
+	}
+}
+
+void bitmap_read(int mw_fd)
+{
+	int ffd, ret;
+	char rbuf[256];
+	unsigned int width, height, i, x, y;
+	unsigned int rowlength;
+	unsigned char *bmapbuf;
+	unsigned char mw_buf[24];
+
+	ffd = open("test.pbm", O_RDONLY);
+	if (ffd < 0) {
+		perror("open");
+		return;
+	};
+	ret = read(ffd, rbuf, 3);
+	if (rbuf[0] != 'P' || rbuf[1] != '4') {
+		fprintf(stderr, "not a PBM file\n");
+		return;
+	}
+	memset(rbuf, 0, 256);
+	i = 0;
+	do {
+		ret = read(ffd, (rbuf+i), 1);
+	} while (!isspace(rbuf[i++]));
+	width = atoi(rbuf);
+
+	memset(rbuf, 0, 256);
+	i = 0;
+	do {
+		ret = read(ffd, (rbuf+i), 1);
+	} while (!isspace(rbuf[i++]));
+	height = atoi(rbuf);
+
+	fprintf(stderr, "bitmap resolution is %d x %d\n", width, height);
+
+	rowlength = ((width / 8) + 1);
+	fprintf(stderr, "row length = %d bytes\n", rowlength);
+
+	bmapbuf = malloc(rowlength * height);
+
+	ret = read(ffd, bmapbuf, rowlength * height);
+	close(ffd);
+	fprintf(stderr, "read %d of %d bytes\n", ret, rowlength * height);
+
+#if 0
+	fprintf(stderr, "\n");
+	for (y=0; y<height; y++) {
+		for (x=0; x<rowlength; x++) {
+			for (i=0; i<8; i++)
+				fprintf(stderr, "%c", (bmapbuf[(y*rowlength)+x] & (1<<(7-i))) ? '.' : ' ');
+		}
+		fprintf(stderr, "\n");
+	}
+	fprintf(stderr, "\n");
+#endif
+
+	flip_buffer_bytes(1, bmapbuf, rowlength * height);
+
+	for (y=0; y<height; y+=2) {
+		memset(mw_buf, 0, 24);
+		memcpy(mw_buf, (bmapbuf+(y*rowlength)), (rowlength > 12) ? 12 : rowlength);
+		memcpy((mw_buf+12), (bmapbuf+((y+1)*rowlength)), (rowlength > 12) ? 12 : rowlength);
+		mw_write_buffer(mw_fd, MW_SCREEN_MODE_IDLE, 0, 31+y, mw_buf, 24);
+	}
+	mw_update_display(mw_fd, MW_SCREEN_MODE_IDLE, 1);
+
+	free(bmapbuf);
+}
+
+
 void process_cmd(char *cmdline, int clinep, int mw_fd)
 {
 	unsigned char mdata[32];
@@ -285,6 +400,12 @@ void process_cmd(char *cmdline, int clinep, int mw_fd)
 	if (strncmp(cmdline, "svib", 4) == 0) {
 		mw_set_vibrate_mode(mw_fd, 1, 300, 300, 5);
 	}
+	if (strncmp(cmdline, "tbmp", 4) == 0) {
+		bitmap_test(mw_fd);
+	}
+	if (strncmp(cmdline, "rbmp", 4) == 0) {
+		bitmap_read(mw_fd);
+	}
 }
 
 

metawatch_protocol.h

@@ -1,3 +1,9 @@
+/*
+ * (c) 2011 Siegen, Germany by Nils Faerber <nils.faerber@kernelconcepts.de>
+ *
+ * license LGPL
+ */
+
 #ifndef _MW_PROT_H
 #define _MW_PROT_H
 
@@ -50,5 +56,19 @@
 #define MW_SCREEN_MODE_NOTIFICATION	0x02
 #define MW_SCREEN_MODE_SCROLL		0x03
 
+const char *mw_screen_mode_names[] = {
+	"idle screen",
+	"application screen",
+	"notification screen",
+	"scroll"
+};
+
+const char *mw_status_string[] = {
+	"Reserved",
+	"Mode Change",
+	"Display Timeout"
+};
+
+
 #endif