[riot-notifications] [RIOT-OS/RIOT] tests/riotboot: make automatic script work with cc2538-bsl (#15446)

[Francisco]

@fjmolinas commented on this pull request.



>  
 
 if __name__ == "__main__":
-    sys.exit(run(testfunc))
+    res = 1
+    global current_app_ver
+    global current_slot_num
+    # set current slot number and app version
+    res = run(testcurrent)

Well I'm not very good at this, and so It is indeed dirty, but I'm under the impression that `run()` only returns an exit code, so either `1` or `0` from what I see in code.

What I need to to is `detach` the terminal before flashing because the `cc2538-bsl` script flashes over serial and therefore I can't have the terminal open when flashing.

`run(testfunc)` among others spawns a terminal and the terminal remains attached until `testfunc` exits. And so to be able to flash to `slot0` and `slot1` I need to be able to do the following:

- attach terminal
- get current slot and app version
- detach terminal
- flash to the other slot with newer app version
- attach terminal
- check everything is OK
- detach terminal
- flash to the other slot with newer app version
- attach terminal
- check everything is OK
- test passed

Having multiple `run(testfunc)` allows handling proper attaching/detaching every time

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