esp-idf/components/soc/esp32c3/uart_periph.c

// Copyright 2020 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#include "soc/uart_periph.h"

/*
 Bunch of constants for every UART peripheral: GPIO signals, irqs, hw addr of registers etc
*/
const uart_signal_conn_t uart_periph_signal[SOC_UART_NUM] = {
   {
        .pins = {
            [SOC_UART_TX_PIN_IDX] = {
                .default_gpio = U0TXD_GPIO_NUM,
                .iomux_func = U0TXD_MUX_FUNC,
                .input = 0,
                .signal = U0TXD_OUT_IDX,
            },

            [SOC_UART_RX_PIN_IDX] = {
                .default_gpio = U0RXD_GPIO_NUM,
                .iomux_func = U0RXD_MUX_FUNC,
                .input = 1,
                .signal = U0RXD_IN_IDX,
            },

            [SOC_UART_RTS_PIN_IDX] = {
                .default_gpio = U0RTS_GPIO_NUM,
                .iomux_func = U0RTS_MUX_FUNC,
                .input = 0,
                .signal = U0RTS_OUT_IDX,
            },

            [SOC_UART_CTS_PIN_IDX] = {
                .default_gpio = U0CTS_GPIO_NUM,
                .iomux_func = U0CTS_MUX_FUNC,
                .input = 1,
                .signal = U0CTS_IN_IDX,
            }
        },
        .irq = ETS_UART0_INTR_SOURCE,
        .module = PERIPH_UART0_MODULE,
    },

    {
        .pins = {
            [SOC_UART_TX_PIN_IDX] = {
                .default_gpio = U1TXD_GPIO_NUM,
                .iomux_func = U1TXD_MUX_FUNC,
                .input = 0,
                .signal = U1TXD_OUT_IDX,
            },

            [SOC_UART_RX_PIN_IDX] = {
                .default_gpio = U1RXD_GPIO_NUM,
                .iomux_func = U1RXD_MUX_FUNC,
                .input = 1,
                .signal = U1RXD_IN_IDX,
            },

            [SOC_UART_RTS_PIN_IDX] = {
                .default_gpio = U1RTS_GPIO_NUM,
                .iomux_func = U1RTS_MUX_FUNC,
                .input = 0,
                .signal = U1RTS_OUT_IDX,
            },

            [SOC_UART_CTS_PIN_IDX] = {
                .default_gpio = U1CTS_GPIO_NUM,
                .iomux_func = U1CTS_MUX_FUNC,
                .input = 1,
                .signal = U1CTS_IN_IDX,
            },
        },
        .irq = ETS_UART1_INTR_SOURCE,
        .module = PERIPH_UART1_MODULE,
    },
};