esp32/machine_uart: Fix check of UART id so it only allows valid UARTs.

7 years ago · 23f9f9495f
1 changed files with 1 additions and 1 deletions
--- a/ports/esp32/machine_uart.c
+++ b/ports/esp32/machine_uart.c
@ -187,7 +187,7 @@ STATIC mp_obj_t machine_uart_make_new(const mp_obj_type_t *type, size_t n_args,

    // get uart id
    mp_int_t uart_num = mp_obj_get_int(args[0]);
-    if (uart_num < 0 || uart_num > UART_NUM_MAX) {
+    if (uart_num < 0 || uart_num >= UART_NUM_MAX) {
        nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "UART(%d) does not exist", uart_num));
    }