Combine SAADC with ble_app_uart_c

[Avi]

I combined SAADC into the ble_app_uart_c example and got error once it got to scan_start();

"ble_scan: sd_ble_gap_scan_start returned 0x9"

If I put the scan_start() in comment, the SAADC is working periodically as it should.

I am using TIMER1=1 and TIMER0=0 based on previous posts.

Should I stop the scan before doing the SAADC?

If yes, how?

[haakonsh]

You can't use TIMER0 as it is required by the SoftDevice, use TIMER2 instead. 

[Avi]

It is still crashing

If I remove the scan_init and scan_start, the SAADC works

If I remove the SAADC - the scan works

Here is my main:

int main(void)
{
// Initialize.
log_init();
timer_init();
uart_init();
buttons_leds_init();
db_discovery_init();
power_management_init();

// Start ADC sampling
saadc_init();
saadc_sampling_event_init();
saadc_sampling_event_enable();

ble_stack_init();
gatt_init();
nus_c_init();
ble_conn_state_init();
scan_init();

// Start execution.
printf("BLE UART central example started.\r\n");
NRF_LOG_INFO("BLE UART central example started.");
scan_start();

// Enter main loop.
for (;;)
{
idle_state_handle();
}

[haakonsh]

Can you share the rest of the code?

[Avi]

Sure, I sent a link to your contact box

[haakonsh]

sd_ble_gap_scan_start returned 0x9

 Well, from the API docs of sd_ble_gap_scan_start a return code of 0x9 means: "The provided buffer length is invalid. See BLE_GAP_SCAN_BUFFER_MIN."

Try increasing NRF_BLE_SCAN_BUFFER. 

[Avi]

Solved!!!

Thank you very much