Keil Debugging

[danbujak]

I'm working based on the HRS central application, and have run into an issue where my if statement is entered even though the condition is not met. In this case, the nrf attempts to perform open scanning even though I have whitelist scanning enabled. I've tried replacing the nordic types with basic ints but I see the same issue.

I debug, check that scan_mode = 1, and then the debugger enters the if statement. See picture below:

[danbujak]

I noticed that turning off optimization fixed the issue. I declared m_scan_mode in the sample as volatile and now it's working.

static volatile ble_scan_mode_t m_scan_mode = BLE_WHITELIST_SCAN; /**< Scan mode used by application. */