Test Loom_PCF8523

Question

Test Loom_PCF8523

Closed this issue 3 years ago · 4 comments

Running the basic repeating PCF example in Loom with the config adjusted ('Interrupt_Manager' should be 'InterruptManager'). The code seems to halt and a featherfault is printed.

Fault! Cause: HARDFAULT
Fault during recording: No
Line: 36
File: PCF8523.cpp
Failures since upload: 2

Answer 1 · 2021-08-11T00:17:37.000Z

Testing with PCF customize time example yields the same fault and halting issue.

Answer 2 · 2021-08-25T19:48:21.000Z

Testing in Loom version 2.5 has no such problem with functionally identical code.

Answer 3 · 2021-08-25T19:53:12.000Z

I have narrowed down the point at which the code halts, to PCF8523.cpp, line 38. It appears to halt after line 38 successfully runs but before the function _begin() returns. I believe the traceback looks as follows (Most recent call last):

PCF8523::PCF8523()
RTC::init()
PCF8523::_begin()

Answer 4 · 2021-08-26T19:14:05.000Z

The error was that PCF8523::_begin() was return type bool, yet the function contained no return statement. So the function could not be evaluated as a boolean where it was called in RTC::init(). Why this did not throw a compilation error or runtime error is beyond me. Adding a "return true;" to the end of _begin() seems to fix the issue.