djsundog/circuitpython
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Merge pull request #6453 from KurtE/ESP32_UART

Browse Source 
ESP32 USE uart_param_config
This commit is contained in:
Scott Shawcroft 2022-06-13 08:56:32 -07:00 committed by GitHub
commit 39b8c2c94e
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 31 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

52
ports/espressif/common-hal/busio/UART.c
View File

@ -108,6 +108,8 @@ void common_hal_busio_uart_construct(busio_uart_obj_t *self,
bool have_rx = rx != NULL;
bool have_rts = rts != NULL;
bool have_cts = cts != NULL;
uart_config_t uart_config = {0};
bool have_rs485_dir = rs485_dir != NULL;
if (!have_tx && !have_rx) {
mp_raise_ValueError(translate("tx and rx cannot both be None"));
@ -135,25 +137,26 @@ void common_hal_busio_uart_construct(busio_uart_obj_t *self,
}
uart_mode_t mode = UART_MODE_UART;
uart_hw_flowcontrol_t flow_control = UART_HW_FLOWCTRL_DISABLE;
uart_config.flow_ctrl = UART_HW_FLOWCTRL_DISABLE;
if (have_rs485_dir) {
mode = UART_MODE_RS485_HALF_DUPLEX;
if (!rs485_invert) {
// This one is not in the set
uart_set_line_inverse(self->uart_num, UART_SIGNAL_DTR_INV);
}
} else if (have_rts && have_cts) {
flow_control = UART_HW_FLOWCTRL_CTS_RTS;
uart_config.flow_ctrl = UART_HW_FLOWCTRL_CTS_RTS;
} else if (have_rts) {
flow_control = UART_HW_FLOWCTRL_RTS;
uart_config.flow_ctrl = UART_HW_FLOWCTRL_RTS;
} else if (have_rts) {
flow_control = UART_HW_FLOWCTRL_CTS;
uart_config.flow_ctrl = UART_HW_FLOWCTRL_CTS;
}
if (receiver_buffer_size <= UART_FIFO_LEN) {
receiver_buffer_size = UART_FIFO_LEN + 8;
}
uint8_t rx_threshold = UART_FIFO_LEN - 8;
uart_config.rx_flow_ctrl_thresh = UART_FIFO_LEN - 8;
// Install the driver before we change the settings.
if (uart_driver_install(self->uart_num, receiver_buffer_size, 0, 20, &self->event_queue, 0) != ESP_OK ||
uart_set_mode(self->uart_num, mode) != ESP_OK) {
@ -175,55 +178,62 @@ void common_hal_busio_uart_construct(busio_uart_obj_t *self,
CONFIG_PTHREAD_TASK_PRIO_DEFAULT,
&self->event_task,
xPortGetCoreID());
uart_set_hw_flow_ctrl(self->uart_num, flow_control, rx_threshold);
// uart_set_hw_flow_ctrl(self->uart_num, uart_config.flow_control, uart_config.rx_flow_ctrl_thresh);
// Set baud rate
common_hal_busio_uart_set_baudrate(self, baudrate);
// common_hal_busio_uart_set_baudrate(self, baudrate);
uart_config.baud_rate = baudrate;
uart_word_length_t word_length = UART_DATA_8_BITS;
uart_config.data_bits = UART_DATA_8_BITS;
switch (bits) {
// Shared bindings prevents data < 7 bits.
// case 5:
// word_length = UART_DATA_5_BITS;
// uart_config.data_bits = UART_DATA_5_BITS;
// break;
// case 6:
// word_length = UART_DATA_6_BITS;
// uart_config.data_bits = UART_DATA_6_BITS;
// break;
case 7:
word_length = UART_DATA_7_BITS;
uart_config.data_bits = UART_DATA_7_BITS;
break;
case 8:
word_length = UART_DATA_8_BITS;
uart_config.data_bits = UART_DATA_8_BITS;
break;
default:
// Won't hit this because shared-bindings limits to 7-9 bits. We error on 9 above.
break;
}
uart_set_word_length(self->uart_num, word_length);
// uart_set_word_length(self->uart_num, uart_config.data_bits);
uart_parity_t parity_mode = UART_PARITY_DISABLE;
uart_config.parity = UART_PARITY_DISABLE;
switch (parity) {
case BUSIO_UART_PARITY_NONE:
parity_mode = UART_PARITY_DISABLE;
uart_config.parity = UART_PARITY_DISABLE;
break;
case BUSIO_UART_PARITY_EVEN:
parity_mode = UART_PARITY_EVEN;
uart_config.parity = UART_PARITY_EVEN;
break;
case BUSIO_UART_PARITY_ODD:
parity_mode = UART_PARITY_ODD;
uart_config.parity = UART_PARITY_ODD;
break;
default:
// Won't reach here because the input is an enum that is completely handled.
break;
}
uart_set_parity(self->uart_num, parity_mode);
// uart_set_parity(self->uart_num, uart_config.parity);
// Stop is 1 or 2 always.
uart_stop_bits_t stop_bits = UART_STOP_BITS_1;
uart_config.stop_bits = UART_STOP_BITS_1;
if (stop == 2) {
stop_bits = UART_STOP_BITS_2;
uart_config.stop_bits = UART_STOP_BITS_2;
}
// uart_set_stop_bits(self->uart_num, stop_bits);
uart_config.source_clk = UART_SCLK_APB; // guessing here...
// config all in one?
if (uart_param_config(self->uart_num, &uart_config) != ESP_OK) {
mp_raise_RuntimeError(translate("UART init"));
}
uart_set_stop_bits(self->uart_num, stop_bits);
self->tx_pin = NULL;
self->rx_pin = NULL;