async_test for test
This is about asynchronous uart output.
When I need to debug my software in a ISR or a task(thread), I worried that printf() might cause some abnormal result.
So, I made my uart output function like printf().
Initialize async_print
title
void timerfunction_async_print() { char c=0; while ( buffer_async_print.available() ) { buffer_async_print.dequeue(&c); pc.putc(c); } timer_async_print.attach(&timerfunction_async_print, 0.1); } void async_print(const char *format, ...) { va_list args; va_start(args, format); vsnprintf(debug_line, sizeof(debug_line), format, args); int length = strlen(debug_line); for (int i=0; i<length; i++) buffer_async_print.queue(debug_line[i]); va_end(args); } int main() { ..................................................... // Initialize AsyncPrint timer_async_print.attach(&timerfunction_async_print, 0.1); p_async_print = &async_print; ..................................................... }
Implementation async_print
void (*p_async_print)(const char *format, ...); void UART0_Handler() { p_async_print("IRQ : UART_IT_FLAG_RXI \r\n"); uart_irq(UART_0, 0); }
Diff: mbed-src.lib
- Revision:
- 0:51977f75213d
diff -r 000000000000 -r 51977f75213d mbed-src.lib --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-src.lib Mon Jul 13 04:38:28 2015 +0000 @@ -0,0 +1,1 @@ +http://developer.mbed.org/users/SteveKim/code/mbed-src/#3825fc0ad3d1