Hi,
As I was supporting the Ambiq series of processor, I ran into what I
think is a bug in console_queue_char().
Specifically,
- console_rx_char() is registered as a uart device callback, which
operates in interrupt context
- console_handle_char() is called by console_rx_char() in
uart_console.c.
- console_handle_char() calls console_out()
- console_out() calls write_char_cb() which is console_queue_char()
- console_queue_char() calls os_time_delay()
So, in the cases where console_queue_char() is called in interrupt
context, and os_time_delay() is hit, the operating system crashes.
os_time_delay() is not meant to be called from interrupt context.
I ran into this due to some errors managing the RX interrupt (more than
(n) bytes in a single RX interrupt), but I’m pretty sure the behavior
should not be this way/it will happen rarely. What do folks think in
terms of potential options for changing it?
Sterling
