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Don't crash on early debug print

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Scott Shawcroft 2022-03-08 17:55:21 -08:00
parent 96f5eec2ee
commit 91468ed36b
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1 changed files with 5 additions and 0 deletions
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5
supervisor/shared/serial.c
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@ -73,6 +73,11 @@ const mp_print_t debug_uart_print = {NULL, debug_uart_print_strn};
int debug_uart_printf(const char *fmt, ...) { int debug_uart_printf(const char *fmt, ...) {
#if defined(CIRCUITPY_DEBUG_UART_TX) #if defined(CIRCUITPY_DEBUG_UART_TX)
// Skip prints that occur before debug serial is started. It's better than
// crashing.
if (common_hal_busio_uart_deinited(&debug_uart)) {
return 0;
}
va_list ap; va_list ap;
va_start(ap, fmt); va_start(ap, fmt);
int ret = mp_vprintf(&debug_uart_print, fmt, ap); int ret = mp_vprintf(&debug_uart_print, fmt, ap);