Hello,
Please check my schematics with PA / LNA.
I have problems activating PA / LNA, the connection is very difficult when using the battery, I am forced to use external power.
Moreover, when reviewing RSSI it is not stable when placed near samsung note 8.
PA / LNA code:
void pa_lna_assist(uint32_t gpio_pa_pin, uint32_t gpio_lna_pin)
{
#if BLE_PA_LNA_ENABLE
uint32_t err_code;
static const uint32_t gpio_toggle_ch = 0;
static const uint32_t ppi_set_ch = 0;
static const uint32_t ppi_clr_ch = 1;
// Configure SoftDevice PA/LNA assist
ble_opt_t opt;
memset(&opt, 0, sizeof(ble_opt_t));
// Common PA/LNA config
opt.common_opt.pa_lna.gpiote_ch_id = gpio_toggle_ch; // GPIOTE channel
opt.common_opt.pa_lna.ppi_ch_id_clr = ppi_clr_ch; // PPI channel for pin clearing
opt.common_opt.pa_lna.ppi_ch_id_set = ppi_set_ch; // PPI channel for pin setting
// PA config
opt.common_opt.pa_lna.pa_cfg.active_high = 1; // Set the pin to be active high
opt.common_opt.pa_lna.pa_cfg.enable = 1; // Enable toggling
opt.common_opt.pa_lna.pa_cfg.gpio_pin = gpio_pa_pin; // The GPIO pin to toggle
// LNA config
opt.common_opt.pa_lna.lna_cfg.active_high = 1; // Set the pin to be active high
opt.common_opt.pa_lna.lna_cfg.enable = 1; // Enable toggling
opt.common_opt.pa_lna.lna_cfg.gpio_pin = gpio_lna_pin; // The GPIO pin to toggle
err_code = sd_ble_opt_set(BLE_COMMON_OPT_PA_LNA, &opt);
APP_ERROR_CHECK(err_code);
#endif
}
int main(void)
{
log_init();
timers_init();
power_management_init();
ble_stack_init();
sd_power_dcdc_mode_set(NRF_POWER_DCDC_ENABLE);
pa_lna_assist(24, 23);
gap_params_init();
gatt_init();
services_init();
advertising_init();
conn_params_init();
application_timers_start();
advertising_start();
for (;;)
{
idle_state_handle();
}
}
Thanks
