+unsigned char *parse_housecode(char *hc)
+{
+ static unsigned char housecode[2];
+ char hc_fixed[9];
+ char *ep;
+ unsigned long val;
+ int i;
+
+ if (hc == NULL)
+ return NULL;
+
+ memset(housecode, 0, sizeof(housecode));
+
+ switch(strlen(hc)) {
+ case 6:
+ if (strncmp(hc, "0x", 2)) {
+ fprintf(stderr, "Not a 2 byte hexstring: %s\n", hc);
+ return NULL;
+ }
+ case 4:
+ val = strtoul(hc, &ep, 16);
+ if (*ep != '\0') {
+ fprintf(stderr, "Not a 2 byte hexstring: %s\n", hc);
+ return NULL;
+ }
+ break;
+ case 8:
+ memset(hc_fixed, 0, sizeof(hc_fixed));
+ for (i = 0; i < 8; i++) {
+ if ((hc[i] < '1') || (hc[i] > '4')) {
+ fprintf(stderr, "Not a valid ELV housecode: %s\n", hc);
+ return NULL;
+ }
+ hc_fixed[i] = hc[i] - 1;
+ val = strtoul(hc_fixed, &ep, 4);
+
+ if (*ep != '\0') {
+ fprintf(stderr, "Can't parse fixed ELV housecode: %s\n", hc_fixed);
+ return NULL;
+ }
+ }
+ break;
+ default:
+ fprintf(stderr, "Housecode has to be in hex (1234, 0x1234) or ELV (12341234) format!\n");
+ return NULL;
+ break;
+ }
+
+ housecode[0] = (val & 0xff00) >> 8;
+ housecode[1] = (val & 0xff);
+
+ return housecode;
+}
+
+int parse_addr(char *ad)
+{
+ int addr = -1;
+ char ad_fixed[5];
+ char *ep;
+ unsigned long val;
+ int i;
+
+ if (ad == NULL)
+ return -1;
+
+ switch(strlen(ad)) {
+ case 4:
+ if (strncmp(ad, "0x", 2)) {
+ memset(ad_fixed, 0, sizeof(ad_fixed));
+ for (i = 0; i < 4; i++) {
+ if ((ad[i] < '1') || (ad[i] > '4')) {
+ fprintf(stderr, "Not a valid ELV address: %s\n", ad);
+ return -1;
+ }
+ ad_fixed[i] = ad[i] - 1;
+ val = strtoul(ad_fixed, &ep, 4);
+
+ if (*ep != '\0') {
+ fprintf(stderr, "Can't parse fixed ELV housecode: %s\n", ad_fixed);
+ return -1;
+ }
+ }
+
+ break;
+ }
+ case 2:
+ val = strtoul(ad, &ep, 16);
+ if (*ep != '\0') {
+ fprintf(stderr, "Not a 1 byte hexstring: %s\n", ad);
+ return -1;
+ }
+ break;
+ default:
+ fprintf(stderr, "Address has to be in hex (01, 0x01) or ELV (1112) format!\n");
+ return -1;
+ break;
+ }
+
+ addr = val & 0xff;
+
+ return addr;
+}
+
+int parse_command(char *cmd)
+{
+ int command = -1;
+ char *ep;
+ unsigned long val;
+
+ if (cmd == NULL)
+ return -1;
+
+ if (!strcasecmp(cmd, "off")) {
+ command = 0x00;
+ } else if (!strcasecmp(cmd, "on")) {
+ command = 0x11;
+ } else if (!strcasecmp(cmd, "toggle")) {
+ command = 0x12;
+ } else if (!strcasecmp(cmd, "dimup")) {
+ command = 0x13;
+ } else if (!strcasecmp(cmd, "dimdown")) {
+ command = 0x14;
+ } else if (!strcasecmp(cmd, "on-for-timer")) {
+ command = 0x39;
+ } else {
+ val = strtoul(cmd, &ep, 16);
+ if (*ep != '\0') {
+ fprintf(stderr, "Not a 1 byte hexstring or alias: %s\n", cmd);
+ return -1;
+ }
+
+ command = val & 0xff;
+ }
+
+ return command;
+}
+
+int parse_extension(char *ext)
+{
+ int extension = -1;
+ char *ep;
+
+ if (ext == NULL)
+ return -1;
+
+ if ((ext[strlen(ext)-1] == 's') ||
+ (ext[strlen(ext)-1] == 'S')) {
+ double t;
+ double diff = 1;
+ uint8_t high = 0;
+ uint8_t low = 0;
+ uint8_t i;
+
+ t = strtoul(ext, &ep, 10);
+ if ((*ep != 's') && (*ep != 'S')) {
+ fprintf(stderr, "Not a valid time in seconds: %s\n", ext);
+ return -1;
+ }
+
+ /* time = 2^(high nibble) * (low nibble) * 0.25 , high may only be 12 */
+ t /= 0.25;
+#ifdef DEBUG
+ printf("t: %f\n", t);
+#endif
+
+ for(i = 1; i <= 0xf; i++) {
+ double h;
+ double l;
+ uint8_t i_l;
+ double d;
+
+#ifdef DEBUG
+ printf("i: 0x%01x\n", i);
+#endif
+
+ h = t / i;
+#ifdef DEBUG
+ printf("h: %f\n", h);
+#endif
+
+ l = log2(h);
+#ifdef DEBUG
+ printf("l: %f\n", l);
+#endif
+
+ i_l = l;
+ if (i_l > 12)
+ i_l = 12;
+
+ d = l - i_l;
+
+#ifdef DEBUG
+ printf("d: %f\n", d);
+#endif
+
+ if (d < diff) {
+#ifdef DEBUG
+ printf("Current best match!\n");
+#endif
+ diff = d;
+ high = l;
+ low = i;
+ }
+ }
+
+#ifdef DEBUG
+ printf("Got: %f, high: %01x, low: %01x\n", t, high, low);
+#endif
+
+ if ((high == 0) && (low == 0)) {
+ fprintf(stderr, "Can't find extension byte for %s!\n", ext);
+ return -1;
+ }
+
+ extension = ((high & 0xf) << 4) | (low & 0xf);
+ } else {
+ unsigned long val;
+
+ val = strtoul(ext, &ep, 16);
+ if (*ep != '\0') {
+ fprintf(stderr, "Not a 1 byte hexstring or time: %s\n", ext);
+ return -1;
+ }
+
+ extension = val & 0xff;
+ }
+
+ return extension;
+}
+
+void syntax(char *prog)
+{
+ fprintf(stderr, "Syntax: %s options\n\n", prog);
+ fprintf(stderr, "Possible options:\n");
+ fprintf(stderr, "\t-V\t\trequest firmware-version\n");
+ fprintf(stderr, "\t-x\t\tabort sending long press\n");
+ fprintf(stderr, "\t-h [ELV|hex]\thousecode in ELV- or hex-notation\n");
+ fprintf(stderr, "The following options need an housecode:\n");
+ fprintf(stderr, "\t-a [ELV|hex]\tdestination address\n");
+ fprintf(stderr, "\t-s [hex|alias]\tsend command byte\n");
+ fprintf(stderr, "\t-e [hex|time]\textension byte for command or time in seconds (e.g. 10s)\n");
+ fprintf(stderr, "\t-r n\t\trepeat sending n times\n");
+ fprintf(stderr, "\nCommand bytes (without extension byte):\n");
+ fprintf(stderr, "hex\t\talias\tdescription\n");
+ fprintf(stderr, "0x00\t\toff\tswitch off\n");
+ fprintf(stderr, "0x01-0x10\t\tswitch on dimmed (0x01: 6.25%%, 0x02: 12.5%%, ..., 0x10: 100%%)\n");
+ fprintf(stderr, "0x11\t\ton\tswitch on\n");
+ fprintf(stderr, "0x12\t\ttoggle\ttoggle\n");
+ fprintf(stderr, "0x13\t\tdimup\tdimup\n");
+ fprintf(stderr, "0x14\t\tdimdown\tdimdown\n");
+ fprintf(stderr, "0x15\t\t\tdimup, pause, dimdown, pause, ...\n");
+ fprintf(stderr, "0x16\t\t\tstart/stop programming internal timer\n");
+ fprintf(stderr, "0x17\t\t\tlearn housecode/address\n");
+ fprintf(stderr, "0x18\t\t\toff for internal timer, then back on with current level\n");
+ fprintf(stderr, "0x19\t\t\ton (100%%) for internal timer, then off\n");
+ fprintf(stderr, "0x1a\t\t\ton (old level) for internal timer, then off\n");
+ fprintf(stderr, "0x1b\t\t\tfactory reset\n");
+ fprintf(stderr, "0x1e\t\t\ton (100%%) for internal timer, then old level\n");
+ fprintf(stderr, "0x1f\t\t\ton (old level) for internal timer, then old state\n");
+ fprintf(stderr, "\nCommand bytes (with timer as extension byte):\n");
+ fprintf(stderr, "hex\t\talias\tdescription\n");
+ fprintf(stderr, "0x20\t\t\tdim down to off while timer is running\n");
+ fprintf(stderr, "0x21-0x30\t\tdim to (0x01: 6.25%%, 0x02: 12.5%%, ..., 0x10: 100%%) while timer is running\n");
+ fprintf(stderr, "0x31\t\t\tdim to last level while timer is running\n");
+ fprintf(stderr, "0x32\t\t\tdim to off, then after timer dim to off\n");
+ fprintf(stderr, "0x33\t\t\tdimup now and switch off after timer\n");
+ fprintf(stderr, "0x34\t\t\tdimdown now and switch off after timer\n");
+ fprintf(stderr, "0x35\t\t\tdimup or dimdown (toggle) and switch off after timer\n");
+ fprintf(stderr, "0x36\t\t\tprogram internal timer\n");
+ fprintf(stderr, "0x38\t\t\toff for timer, then back on with current level\n");
+ fprintf(stderr, "0x39\ton-for-timer\ton (100%%) for timer, then off\n");
+ fprintf(stderr, "0x3a\t\t\ton (old level) for timer, then off\n");
+ fprintf(stderr, "0x3c\t\t\tprogram internal ramp-up-time\n");
+ fprintf(stderr, "0x3d\t\t\tprogram internal ramp-down-time\n");
+ fprintf(stderr, "0x3e\t\t\ton (100%%) for timer, then old level\n");
+ fprintf(stderr, "0x3f\t\t\ton (old level) for timer, then old state\n");
+};
+
+enum {
+ NO_ACTION,
+ REQUEST_FIRMWARE,
+ SEND_COMMAND,
+ ABORT_LONG_PRESS
+};
+
+#define DUPLICATE_ACTION if (action != NO_ACTION) { \
+ fprintf(stderr, "duplicate action specified!\n"); \
+ exit(EXIT_FAILURE); }
+