esp-idf/components/hal/uart_hal_iram.c

// Copyright 2015-2019 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.

// The HAL layer for UART (IRAM part)
#include "hal/uart_hal.h"

void uart_hal_txfifo_rst(uart_hal_context_t *hal)
{
    uart_ll_txfifo_rst(hal->dev);
}

void uart_hal_rxfifo_rst(uart_hal_context_t *hal)
{
    uart_ll_rxfifo_rst(hal->dev);
}

void uart_hal_tx_break(uart_hal_context_t *hal, uint32_t break_num)
{
    uart_ll_tx_break(hal->dev, break_num);
}

void uart_hal_write_txfifo(uart_hal_context_t *hal, const uint8_t *buf, uint32_t data_size, uint32_t *write_size)
{
    uint16_t fill_len = uart_ll_get_txfifo_len(hal->dev);
    if(fill_len > data_size) {
        fill_len = data_size;
    }
    *write_size = fill_len;
    uart_ll_write_txfifo(hal->dev, buf, fill_len);
}

void uart_hal_read_rxfifo(uart_hal_context_t *hal, uint8_t *buf, int *inout_rd_len)
{
    uint16_t read_len = (*inout_rd_len > 0) ? *inout_rd_len : uart_ll_get_rxfifo_len(hal->dev);
    *inout_rd_len = read_len;
    uart_ll_read_rxfifo(hal->dev, buf, read_len);
}