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esp32/machine_uart: Always configure timeout_char setting in init(). 

If the `timeout_char` parameter is not given, we should still configure the
UART to ensure the UART is always initialized consistently.  So the default
of 0 gets applied correctly, or if, for example, the baudrate was changed
the char timeout isn't still based on the old baudrate causing weird
behaviour, etc.

Signed-off-by: Daniël van de Giessen <daniel@dvdgiessen.nl>
pull/14025/head
Daniël van de Giessen 2023-12-12 15:59:46 +01:00 zatwierdzone przez Damien George
rodzic cdfc6c159f
commit 20f85fb26e
1 zmienionych plików z 9 dodań i 9 usunięć
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18
ports/esp32/machine_uart.c
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@ -277,17 +277,17 @@ static void mp_machine_uart_init_helper(machine_uart_obj_t *self, size_t n_args,
}
// set timeout_char
// 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 char_time_ms = 12000 / baudrate + 1;
uint32_t rx_timeout = self->timeout_char / char_time_ms;
if (rx_timeout < 1) {
check_esp_err(uart_set_rx_full_threshold(self->uart_num, 1));
check_esp_err(uart_set_rx_timeout(self->uart_num, 1));
} else {
check_esp_err(uart_set_rx_timeout(self->uart_num, rx_timeout));
}
}
// make sure it is at least as long as a whole character (12 bits here)
uint32_t char_time_ms = 12000 / baudrate + 1;
uint32_t rx_timeout = self->timeout_char / char_time_ms;
if (rx_timeout < 1) {
check_esp_err(uart_set_rx_full_threshold(self->uart_num, 1));
check_esp_err(uart_set_rx_timeout(self->uart_num, 1));
} else {
check_esp_err(uart_set_rx_timeout(self->uart_num, rx_timeout));
}
// set line inversion