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set power level for Bluetooth Low Energy, thanks to Hasjim for figuring this out

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matthias.ringwald@gmail.com 2014-10-30 09:53:14 +00:00
parent 5d07299d04
commit bc8e7c68c3
1 changed files with 16 additions and 1 deletions
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17
chipset-cc256x/bt_control_cc256x.c
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@ -54,8 +54,12 @@
*
* Issues with AVR
* - Harvard architecture doesn't allow to store init script directly -> use avr-libc helpers
*
* Documentation for TI VS CC256x commands: http://processors.wiki.ti.com/index.php/CC256x_VS_HCI_Commands
*
*/
#include "btstack-config.h"
#include "bt_control_cc256x.h"
#include <stddef.h> /* NULL */
@ -138,10 +142,21 @@ static int get_highest_level_for_given_power(int power_db, int recommended_db){
static void update_set_power_vector(uint8_t *hci_cmd_buffer){
int i;
int power_db = get_max_power_for_modulation_type(hci_cmd_buffer[3]);
int modulation_type = hci_cmd_buffer[3];
int power_db = get_max_power_for_modulation_type(modulation_type);
int dynamic_range = 0;
// f) don't touch level 0
for ( i = (NUM_POWER_LEVELS-1) ; i >= 1 ; i--){
#ifdef HAVE_BLE
// level 1 is BLE transmit power for GFSK
if (i == 1 && modulation_type == 0) {
hci_cmd_buffer[4+1] = 2 * get_max_power_for_modulation_type(modulation_type);
// as level 0 isn't set, we're done
continue;
}
#endif
hci_cmd_buffer[4+i] = 2 * power_db;
if (dynamic_range + DB_PER_LEVEL > DB_DYNAMIC_RANGE) continue; // e)