We have a system with multiple log backends enabled. The goal is to ultimately keep one of the backends to globally only see errors/warnings while the other gets all the a module sends.
Currently, I cannot get log filtering to work at all. I am using nrf Connect SDK 2.7. The hardware is an nrf52840 module.
prj.conf includes:
In my code I have just tried to do some basic filtering of logs with:
const struct log_backend *uart_backend = log_backend_get_by_name("log_backend_uart");
if (uart_backend != NULL) {
LOG_INF("Setting Logs to WRN");
uint32_t filret = log_filter_set(uart_backend, 0, LOG_CURRENT_MODULE_ID(), LOG_LEVEL_WRN);
LOG_INF("Filter Set Result: %d", filret);
} else {
LOG_WRN("Backend NULL");
}
uint32_t runtime_filter = log_filter_get(uart_backend, 0, LOG_CURRENT_MODULE_ID(), true);
uint32_t static_filter = log_filter_get(uart_backend, 0, LOG_CURRENT_MODULE_ID(), false);
LOG_WRN("Runtime: %d, Static: %d", runtime_filter, static_filter);
The logs from this look like:
<inf> main : Setting Logs to WRN
<inf> main : Filter Set Result: 2
<wrn> main : Runtime: 4, Static: 4
This is very confusing to me because "log_filter_set" is supposed to return the log level that is being set, but then I immediately do a "log_level_get" and the value is not the same as what was just set a few lines earlier. My INF level logs are still coming through as well.
I have tried a bunch of different types of filter and cannot get the logging level to change at all. I am at the point where I am out of ideas, I cannot get log_filter_set to do anything but it always returns the value I expect it to as if it has worked correctly.
Are there other project configurations or settings that could be overriding this runtime setting?
