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esp32/machine_uart: Make UART.init preserve unspecified parameters. 

Most of the settings behaved that way, except for baudate, timeout,
timout_char, invert and flow.
This commit is contained in:
robert-hh 2022-02-27 18:09:41 +01:00 committed by Damien George
parent 55a0125a15
commit d696d9141e
1 changed files with 26 additions and 16 deletions
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42
ports/esp32/machine_uart.c
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@ -139,10 +139,10 @@ STATIC void machine_uart_init_helper(machine_uart_obj_t *self, size_t n_args, co
{ MP_QSTR_cts, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = UART_PIN_NO_CHANGE} },
{ MP_QSTR_txbuf, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1} },
{ MP_QSTR_rxbuf, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1} },
{ MP_QSTR_timeout, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
{ MP_QSTR_timeout_char, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
{ MP_QSTR_invert, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
{ MP_QSTR_flow, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
{ MP_QSTR_timeout, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1} },
{ MP_QSTR_timeout_char, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1} },
{ MP_QSTR_invert, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1} },
{ MP_QSTR_flow, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1} },
};
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
@ -181,8 +181,8 @@ STATIC void machine_uart_init_helper(machine_uart_obj_t *self, size_t n_args, co
uint32_t baudrate = 115200;
if (args[ARG_baudrate].u_int > 0) {
uart_set_baudrate(self->uart_num, args[ARG_baudrate].u_int);
uart_get_baudrate(self->uart_num, &baudrate);
}
uart_get_baudrate(self->uart_num, &baudrate);
uart_set_pin(self->uart_num, args[ARG_tx].u_int, args[ARG_rx].u_int, args[ARG_rts].u_int, args[ARG_cts].u_int);
if (args[ARG_tx].u_int != UART_PIN_NO_CHANGE) {
@ -262,28 +262,36 @@ STATIC void machine_uart_init_helper(machine_uart_obj_t *self, size_t n_args, co
}
// set timeout
self->timeout = args[ARG_timeout].u_int;
if (args[ARG_timeout].u_int != -1) {
self->timeout = args[ARG_timeout].u_int;
}
// set timeout_char
// make sure it is at least as long as a whole character (13 bits to be safe)
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;
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;
}
}
// set line inversion
if (args[ARG_invert].u_int & ~UART_INV_MASK) {
mp_raise_ValueError(MP_ERROR_TEXT("invalid inversion mask"));
if (args[ARG_invert].u_int != -1) {
if (args[ARG_invert].u_int & ~UART_INV_MASK) {
mp_raise_ValueError(MP_ERROR_TEXT("invalid inversion mask"));
}
self->invert = args[ARG_invert].u_int;
}
self->invert = args[ARG_invert].u_int;
uart_set_line_inverse(self->uart_num, self->invert);
// set hardware flow control
if (args[ARG_flow].u_int & ~UART_HW_FLOWCTRL_CTS_RTS) {
mp_raise_ValueError(MP_ERROR_TEXT("invalid flow control mask"));
if (args[ARG_flow].u_int != -1) {
if (args[ARG_flow].u_int & ~UART_HW_FLOWCTRL_CTS_RTS) {
mp_raise_ValueError(MP_ERROR_TEXT("invalid flow control mask"));
}
self->flowcontrol = args[ARG_flow].u_int;
}
self->flowcontrol = args[ARG_flow].u_int;
uart_set_hw_flow_ctrl(self->uart_num, self->flowcontrol, UART_FIFO_LEN - UART_FIFO_LEN / 4);
}
@ -319,6 +327,8 @@ STATIC mp_obj_t machine_uart_make_new(const mp_obj_type_t *type, size_t n_args,
self->rxbuf = 256; // IDF minimum
self->timeout = 0;
self->timeout_char = 0;
self->invert = 0;
self->flowcontrol = 0;
switch (uart_num) {
case UART_NUM_0: