diff options
| -rw-r--r-- | ports/esp32/machine_uart.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/ports/esp32/machine_uart.c b/ports/esp32/machine_uart.c index c0eedb80b..49ce78b1b 100644 --- a/ports/esp32/machine_uart.c +++ b/ports/esp32/machine_uart.c @@ -267,12 +267,18 @@ STATIC void machine_uart_init_helper(machine_uart_obj_t *self, size_t n_args, co } // set timeout_char - // make sure it is at least as long as a whole character (13 bits to be safe) + // make sure it is at least as long as a whole character (12 bits here) if (args[ARG_timeout_char].u_int != -1) { self->timeout_char = args[ARG_timeout_char].u_int; - uint32_t min_timeout_char = 13000 / baudrate + 1; - if (self->timeout_char < min_timeout_char) { - self->timeout_char = min_timeout_char; + uint32_t char_time_ms = 12000 / baudrate + 1; + uint32_t rx_timeout = self->timeout_char / char_time_ms; + if (rx_timeout < 1) { + #if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(4, 1, 0) + uart_set_rx_full_threshold(self->uart_num, 1); + #endif + uart_set_rx_timeout(self->uart_num, 1); + } else { + uart_set_rx_timeout(self->uart_num, rx_timeout); } } |