[PATCH] hcitool: fix interval and window parameters
From: Andre Guedes <hidden>
Date: 2011-02-24 18:56:08
Subsystem:
the rest · Maintainer:
Linus Torvalds
Set interval and window parameters properly if --discovery option is present in lescan command. According to the Bluetooth spec, during a general or limited discovery procedure the scan interval and the scan window should be set to 11.25 ms. If --discovery option isn't present, both parameters are set to the default value (10 ms) defined in LE Set Scan Parameters Command. According to that command description, the interval and window parameters should be set as follows: Time = N * 0.625 msec So, in order to set the time values to 11.25 and 10 ms, the parameters should be equal to 18 (0x0012) and 16 (0x0010), respectively. --- tools/hcitool.c | 9 +++++++-- 1 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/tools/hcitool.c b/tools/hcitool.c
index cb7d181..c5254ea 100644
--- a/tools/hcitool.c
+++ b/tools/hcitool.c@@ -2429,6 +2429,8 @@ static void cmd_lescan(int dev_id, int argc, char **argv) uint8_t own_type = 0x00; uint8_t scan_type = 0x01; uint8_t filter_type = 0; + uint16_t interval = htobs(0x0010); + uint16_t window = htobs(0x0010); for_each_opt(opt, lescan_options, NULL) { switch (opt) {
@@ -2444,6 +2446,9 @@ static void cmd_lescan(int dev_id, int argc, char **argv) fprintf(stderr, "Unknown discovery procedure\n"); exit(1); } + + interval = htobs(0x0012); + window = htobs(0x0012); break; default: printf("%s", lescan_help);
@@ -2461,8 +2466,8 @@ static void cmd_lescan(int dev_id, int argc, char **argv) exit(1); } - err = hci_le_set_scan_parameters(dd, scan_type, htobs(0x0010), - htobs(0x0010), own_type, 0x00); + err = hci_le_set_scan_parameters(dd, scan_type, interval, window, + own_type, 0x00); if (err < 0) { perror("Set scan parameters failed"); exit(1);
--
1.7.1