diff options
| -rw-r--r-- | ports/esp32/machine_uart.c | 23 |
1 files changed, 7 insertions, 16 deletions
diff --git a/ports/esp32/machine_uart.c b/ports/esp32/machine_uart.c index 49ce78b1b..28110e39f 100644 --- a/ports/esp32/machine_uart.c +++ b/ports/esp32/machine_uart.c @@ -399,28 +399,19 @@ STATIC mp_obj_t machine_uart_sendbreak(mp_obj_t self_in) { machine_uart_obj_t *self = MP_OBJ_TO_PTR(self_in); // Save settings - uart_word_length_t word_length; - uart_parity_t parity; - uart_get_word_length(self->uart_num, &word_length); - uart_get_parity(self->uart_num, &parity); + uint32_t baudrate; + uart_get_baudrate(self->uart_num, &baudrate); - // Synthesise the break condition by either a longer word or using even parity + // Synthesise the break condition by reducing the baud rate, + // and cater for the worst case of 5 data bits, no parity. uart_wait_tx_done(self->uart_num, pdMS_TO_TICKS(1000)); - if (word_length != UART_DATA_8_BITS) { - uart_set_word_length(self->uart_num, UART_DATA_8_BITS); - } else if (parity == UART_PARITY_DISABLE) { - uart_set_parity(self->uart_num, UART_PARITY_EVEN); - } else { - // Cannot synthesise break - mp_raise_OSError(MP_EPERM); - } + uart_set_baudrate(self->uart_num, baudrate * 6 / 15); char buf[1] = {0}; uart_write_bytes(self->uart_num, buf, 1); uart_wait_tx_done(self->uart_num, pdMS_TO_TICKS(1000)); - // Restore original settings - uart_set_word_length(self->uart_num, word_length); - uart_set_parity(self->uart_num, parity); + // Restore original setting + uart_set_baudrate(self->uart_num, baudrate); return mp_const_none; } |