From: Michael Gernoth Date: Sun, 6 Sep 2015 10:19:10 +0000 (+0200) Subject: flash-ota: make it possible to reduce the payload-length with -l X-Git-Tag: v0.102~19 X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/hmcfgusb/commitdiff_plain/dfe2e5e2a8df48d1d2c15e18a046e1a81d1fb67a?hp=920d34e08c728c4e56f80fad26bc8f81f044f674 flash-ota: make it possible to reduce the payload-length with -l --- diff --git a/flash-ota.c b/flash-ota.c index 754cc29..50f20f6 100644 --- a/flash-ota.c +++ b/flash-ota.c @@ -43,13 +43,18 @@ #include "culfw.h" #include "util.h" -#define MAX_RETRIES 5 +#define MAX_RETRIES 5 +#define NORMAL_MAX_PAYLOAD 37 +#define LOWE_MAX_PAYLOAD 17 extern char *optarg; uint32_t hmid = 0; uint32_t my_hmid = 0; +/* Maximum payloadlen supported by IO */ +uint32_t max_payloadlen = NORMAL_MAX_PAYLOAD; + enum device_type { DEVICE_TYPE_HMCFGUSB, DEVICE_TYPE_CULFW, @@ -337,6 +342,7 @@ void flash_ota_syntax(char *prog) fprintf(stderr, "\nPossible options:\n"); fprintf(stderr, "\t-c device\tenable CUL-mode with CUL at path \"device\"\n"); fprintf(stderr, "\t-b bps\t\tuse CUL with speed \"bps\" (default: %u)\n", DEFAULT_CUL_BPS); + fprintf(stderr, "\t-l\t\tlower payloadlen (required for devices with little RAM, e.g. CUL v2 and CUL v4)\n"); fprintf(stderr, "\t-h\t\tthis help\n"); } @@ -366,7 +372,7 @@ int main(int argc, char **argv) printf("HomeMatic OTA flasher version " VERSION "\n\n"); - while((opt = getopt(argc, argv, "b:c:f:hs:")) != -1) { + while((opt = getopt(argc, argv, "b:c:f:hls:")) != -1) { switch (opt) { case 'b': bps = atoi(optarg); @@ -377,6 +383,10 @@ int main(int argc, char **argv) case 'f': fw_file = optarg; break; + case 'l': + printf("Reducing payload-len from %d to %d\n", max_payloadlen, LOWE_MAX_PAYLOAD); + max_payloadlen = LOWE_MAX_PAYLOAD; + break; case 's': serial = optarg; break; @@ -412,7 +422,7 @@ int main(int argc, char **argv) } dev.type = DEVICE_TYPE_CULFW; - printf("Requesting firmware-version\n"); + printf("Requesting firmware version\n"); culfw_send(dev.culfw, "\r\n", 2); culfw_flush(dev.culfw); @@ -645,11 +655,11 @@ int main(int argc, char **argv) first = 1; cnt = 0; do { - int payloadlen = 35; + int payloadlen = max_payloadlen - 2; int ack = 0; if (first) { - payloadlen = 37; + payloadlen = max_payloadlen; first = 0; }