+ buflen = 12 * (buflen / 12); /* crop to 12 bytes */
+ if ((numlines == 0 && buflen < 12) || (numlines == 1 && buflen < 24)) {
+ fprintf(stderr, "mw_write_buffer: bufferlen does not match number of lines\n");
+ return;
+ };
+ memset(mdata, 0, 32);
+ mdata[0] = row_offset;
+ memcpy((mdata+1), buffer, 12);
+ if (numlines == 0) {
+ mdata[13] = row_offset+1;
+ memcpy((mdata+14), (buffer+12), 12);
+ };
+ mw_send_frame(mw_fd, MW_WRITE_BUFFER, (mode & 0x0f) | (((numlines & 0x01)<< 4) & 0x10), mdata, numlines ? 13 : 26);
+}
+
+
+/* ----------------------------------------------------------------------
+ * Watch responses, events or notifications
+ * ---------------------------------------------------------------------- */
+
+
+void mw_get_real_time_clock_response(int mw_fd, unsigned char *rtcrsp, int len)
+{
+ struct tm mtm;
+ unsigned short year;
+ unsigned char clk1224, date_fmt;
+
+ if (len != 10) {
+ fprintf(stderr, "get real time clock response too short %d != 10\n", len);
+ return;
+ }
+
+ year = *(unsigned short *)rtcrsp;
+ mtm.tm_year = year - 1900;
+ mtm.tm_mon = rtcrsp[2] - 1;
+ mtm.tm_mday = rtcrsp[3];
+ mtm.tm_wday = rtcrsp[4];
+ mtm.tm_hour = rtcrsp[5];
+ mtm.tm_min = rtcrsp[6];
+ mtm.tm_sec = rtcrsp[7];
+ clk1224 = rtcrsp[8];
+ date_fmt = rtcrsp[9];
+
+ fprintf(stderr, "watch RTC is %s, clock format is %s, date format is %s\n", asctime(&mtm), clk1224 ? "24h" : "AM/PM", date_fmt ? "DD/MM" : "MM/DD");
+}
+
+void mw_get_battery_voltage_response(int mw_fd, unsigned char *batrsp, int len)
+{
+ unsigned short voltage = *(unsigned short *)batrsp;
+ unsigned char power_good = batrsp[2];
+ unsigned char bat_charging = batrsp[3];
+
+ 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_read_light_sensor_response(int mw_fd, unsigned char *lightrsp, int len)
+{
+ unsigned char power_good = lightrsp[0];
+ unsigned char bat_charging = lightrsp[1];
+ unsigned short voltage = *(unsigned short *)(lightrsp+2);
+
+ fprintf(stderr, "light sensor is at %d, power stat: %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)
+{
+#ifdef DEBUG
+ fprintf(stderr, "Status change event for mode %s: %s\n", mw_screen_mode_names[option&0x0f], mw_status_string[statrsp[0]]);
+#endif
+}
+
+
+/* ----------------------------------------------------------------------
+ * Protocol handling
+ * ---------------------------------------------------------------------- */
+
+
+int decode_frame(int mw_fd, unsigned char *buf, int len)
+{
+ unsigned short crc;
+ unsigned char msglen;
+ unsigned char msgtype;
+ unsigned char msgopt;
+ unsigned char *msgdata;
+
+ /* check frame */
+ crc = *(unsigned short *)(buf+len-2);
+ if (crc != crc16ccitt(buf, len-2)) {
+ fprintf(stderr, "decode frame CRC error\n");
+ return 1;
+ }
+#ifdef DEBUG
+ else
+ fprintf(stderr, "decode frame CRC OK\n");
+#endif
+ if (buf[0] != MW_SOF) {
+ fprintf(stderr, "decode frame SOF not found\n");
+ return 1;
+ }
+#ifdef DEBUG
+ else
+ fprintf(stderr, "decode frame found SOF\n");
+#endif
+
+ msglen = buf[1];
+ msgtype = buf[2];
+ msgopt = buf[3];
+ msgdata = (buf+4);
+
+ switch (msgtype) {
+ case MW_GET_DEVICE_TYPE_RSP:
+ fprintf(stderr, "Got device type ");
+ switch(msgdata[0]) {
+ case 0:
+ fprintf(stderr, "Reserved\n");
+ break;
+ case 1:
+ fprintf(stderr, "Ana-Digi\n");
+ break;
+ case 2:
+ fprintf(stderr, "Digital\n");
+ break;
+ case 3:
+ fprintf(stderr, "Development Board Digital\n");
+ break;
+ case 4:
+ fprintf(stderr, "Development Board Ana-Digi\n");
+ break;
+ default:
+ fprintf(stderr, "unknown %d\n", msgdata[0]);
+ break;
+ };
+ break;
+ case MW_GET_INFORMATION_STRING_RSP:
+ msgdata[len-2] = 0;
+ fprintf(stderr, "Got info string '%s'\n", msgdata);
+ break;
+ case MW_GET_REAL_TIME_CLOCK_RSP:
+ mw_get_real_time_clock_response(mw_fd, msgdata, len-2);
+ break;
+ case MW_READ_BATTERY_VOLTAGE_RSP:
+ mw_get_battery_voltage_response(mw_fd, msgdata, len-2);
+ break;
+ case MW_READ_LIGHT_SENSOR_RSP:
+ mw_read_light_sensor_response(mw_fd, msgdata, len-2);
+ break;
+ case MW_LOW_BATTERY_WARNING_MSG:
+ fprintf(stderr, "Watch battery low, please connect charger\n");
+ break;
+ 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-2);
+ break;
+ default:
+ fprintf(stderr, "Unkown msgtype 0x%02x\n", msgtype);
+ break;
+ };
+
+ return 0;
+}
+
+
+/* ----------------------------------------------------------------------
+ * Convenience functions not strictly part of the protocol
+ * ---------------------------------------------------------------------- */
+
+/* if flip=1 bits in each byte are inverted 7->1, 6->2, 5->3,...
+ if invert=1 each byte is inverted
+ */
+void bmap_buffer_flipinvert(unsigned char flip, unsigned char invert, unsigned char *buf, int len)
+{
+ int i;
+ unsigned char tmp;
+
+ while (len--) {
+ tmp = 0;
+ if (flip) {
+ for (i=0; i<8; i++)
+ tmp |= ((*buf & (1<<i)) >> i) << (7-i);
+ // fprintf(stderr, "0x%02x -> 0x%02x\n", *buf, tmp);
+ } else
+ tmp = *buf;
+ *buf = invert ? ~tmp : tmp;
+ buf++;
+ }
+}
+
+
+void mw_send_bitmap(int mw_fd, unsigned char mode, int width, int height, int offset, unsigned char *bmapbuf, int buflen)
+{
+#ifdef DEBUG
+ unsigned int i, x;
+#endif
+ unsigned int y, rowlength;
+ unsigned char mw_buf[24];
+
+ rowlength = ((width / 8) + 1);
+ if ((height + offset) > 96)
+ height = 96 - offset;
+
+#ifdef DEBUG
+ fprintf(stderr, "row length = %d bytes\n", rowlength);
+ fprintf(stderr, "bitmap resolution is %d x %d\n", width, height);
+ 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
+
+ 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, mode, 0, 31+y, mw_buf, 24);
+ }
+}