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Add new stdio_usb_run_chars_available_callback() function #2300

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Add new stdio_usb_run_chars_available_callback() function #2300

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13 changes: 13 additions & 0 deletions src/rp2_common/pico_stdio_usb/include/pico/stdio_usb.h
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Original file line number Diff line number Diff line change
Expand Up @@ -161,6 +161,19 @@ bool stdio_usb_deinit(void);
* \return true if stdio is connected over CDC
*/
bool stdio_usb_connected(void);

#if PICO_STDIO_USB_SUPPORT_CHARS_AVAILABLE_CALLBACK
/*! \brief Explicitly runs the registered USB stdio chars_available_callback
* \ingroup pico_stdio_usb
*
* \ref This method is normally called by the internal USB stdio background thread when there is new USB CDC
* data available to read. However, if the internal background thread is disabled (e.g. when the user
* directly links tinyUSB), the user will need to implement their own background thread and call this
* method directly.
*/
void stdio_usb_run_chars_available_callback(void);
#endif

#ifdef __cplusplus
}
#endif
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8 changes: 7 additions & 1 deletion src/rp2_common/pico_stdio_usb/stdio_usb.c
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Original file line number Diff line number Diff line change
Expand Up @@ -66,7 +66,7 @@ static void low_priority_worker_irq(void) {
#endif
mutex_exit(&stdio_usb_mutex);
#if PICO_STDIO_USB_SUPPORT_CHARS_AVAILABLE_CALLBACK
if (chars_avail && chars_available_callback) chars_available_callback(chars_available_param);
if (chars_avail && chars_available_callback) stdio_usb_run_chars_available_callback();
#endif
} else {
// if the mutex is already owned, then we are in non IRQ code in this file.
Expand Down Expand Up @@ -171,6 +171,12 @@ void stdio_usb_set_chars_available_callback(void (*fn)(void*), void *param) {
chars_available_callback = fn;
chars_available_param = param;
}

void stdio_usb_run_chars_available_callback(void) {
if (chars_available_callback) {
chars_available_callback(chars_available_param);
}
}
#endif

stdio_driver_t stdio_usb = {
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