diff options
| author | robert-hh <robert@hammelrath.com> | 2022-10-16 13:49:03 +0200 |
|---|---|---|
| committer | Damien George <damien@micropython.org> | 2022-11-09 11:16:55 +1100 |
| commit | d68e3b03b1053a6de0c7eb28f5989132c138364b (patch) | |
| tree | e24734a49b6ab94da96ec8881981018c6ae478c0 /ports/esp32/usb.c | |
| parent | 5d473d309396942092077f4917be3e044c9a6c39 (diff) | |
esp32/usb: Add a timeout to usb_tx_strn().
If USB CDC is connected and the board sends data, but the host does not
receive the data, the device locks up. This is fixed in this commit by
having a timeout of 500ms, after which time the transmission is skipped.
Diffstat (limited to 'ports/esp32/usb.c')
| -rw-r--r-- | ports/esp32/usb.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/ports/esp32/usb.c b/ports/esp32/usb.c index 5a613d244..953c5422b 100644 --- a/ports/esp32/usb.c +++ b/ports/esp32/usb.c @@ -88,7 +88,8 @@ void usb_init(void) { void usb_tx_strn(const char *str, size_t len) { // Write out the data to the CDC interface, but only while the USB host is connected. - while (usb_cdc_connected && len) { + uint64_t timeout = esp_timer_get_time() + (uint64_t)(MICROPY_HW_USB_CDC_TX_TIMEOUT * 1000); + while (usb_cdc_connected && len && esp_timer_get_time() < timeout) { size_t l = tinyusb_cdcacm_write_queue(CDC_ITF, (uint8_t *)str, len); str += l; len -= l; |