#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
+#include <string.h>
+#include <time.h>
#include "metawatch_protocol.h"
+#include "crc16ccitt.h"
+
+
+void dump_frame(unsigned char *frame, int len)
+{
+ int i;
+ for (i=0; i<len; i++)
+ fprintf(stderr, "0x%02x ", frame[i]);
+ fprintf(stderr, "\n");
+}
+
+
+void mw_send_packet(int mw_fd, unsigned char msg_type, unsigned char options, unsigned char *data, unsigned char len)
+{
+ unsigned short crc;
+ unsigned char frame[64];
+
+ memset(frame, 0, 64);
+ frame[0] = MW_SOF;
+ frame[1] = len + 6;
+ frame[2] = msg_type;
+ frame[3] = options;
+ memcpy(frame+4, data, len);
+
+ crc = crc16ccitt(frame, len+4);
+ *(unsigned short *)(frame+len+4) = crc;
+
+ dump_frame(frame, len+6);
+
+ write(mw_fd, frame, len+6);
+}
+
+void mw_set_rtc(int mw_fd, unsigned char clk1224, unsigned char date_fmt)
+{
+ time_t mtime;
+ struct tm mtm;
+ unsigned short year;
+ unsigned char data[32];
+
+ mtime = time(NULL);
+ localtime_r(&mtime, &mtm);
+
+ year = mtm.tm_year + 1900;
+ data[0] = (year & 0x0f00) >> 8;
+ data[1] = (year & 0x00ff);
+ data[2] = mtm.tm_mon + 1;
+ data[3] = mtm.tm_mday;
+ data[4] = mtm.tm_wday;
+ data[5] = mtm.tm_hour;
+ data[6] = mtm.tm_min;
+ data[7] = mtm.tm_sec;
+ data[8] = clk1224;
+ data[9] = date_fmt;
+
+ mw_send_packet(mw_fd, MW_SET_REAL_TIME_CLOCK, 0, data, 10);
+}
+
int main(int argc, char **argv)
{
- int mwfd;
+ int mw_fd;
if (argc != 2) {
fprintf(stderr, "Usage:\n\t%s <devicename>\n", argv[0]);
return 1;
};
- mwfd = open(argv[1], O_RDWR);
- if (mwfd < 0) {
+ crc16ccitt_init();
+
+ mw_fd = open(argv[1], O_RDWR);
+ if (mw_fd < 0) {
perror("open");
return 1;
};
+ mw_set_rtc(mw_fd, MW_RTC_CLOCK_24HR, MW_RTC_DATE_DDMM);
+
+ fsync(mw_fd);
+
+ close(mw_fd);
+
return 0;
};