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Fix stdio_set_chars_available_callback for usb (#1649)

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When you get a callback to tell you a character is available, you should
be able to call getchar_timeout_us, but it's not working for USB

Fixes #1603

Co-authored-by: Andrew Gordon <arg@gordondesign.ltd.uk>
This commit is contained in:
Peter Harper 2024-05-19 00:59:47 +01:00 committed by GitHub
parent fcd5333f6b
commit ac8f277e5a
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GPG Key ID: B5690EEEBB952194
1 changed files with 6 additions and 6 deletions
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12
src/rp2_common/pico_stdio_usb/stdio_usb.c
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@ -57,7 +57,13 @@ static int64_t timer_task(__unused alarm_id_t id, __unused void *user_data) {
static void low_priority_worker_irq(void) {
if (mutex_try_enter(&stdio_usb_mutex, NULL)) {
tud_task();
#if PICO_STDIO_USB_SUPPORT_CHARS_AVAILABLE_CALLBACK
uint32_t chars_avail = tud_cdc_available();
#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);
#endif
} else {
// if the mutex is already owned, then we are in non IRQ code in this file.
//
@ -147,12 +153,6 @@ int stdio_usb_in_chars(char *buf, int length) {
}
#if PICO_STDIO_USB_SUPPORT_CHARS_AVAILABLE_CALLBACK
void tud_cdc_rx_cb(__unused uint8_t itf) {
if (chars_available_callback) {
usbd_defer_func(chars_available_callback, chars_available_param, false);
}
}
void stdio_usb_set_chars_available_callback(void (*fn)(void*), void *param) {
chars_available_callback = fn;
chars_available_param = param;