mirror of
https://github.com/espressif/ESP8266_RTOS_SDK.git
synced 2025-05-20 08:36:41 +08:00
b522e9a0e1
1. Remove unused or unsupported unit test 2. Add extra header file to pass compiling 3. Remove unsupported functions
128 lines
3.0 KiB
C
128 lines
3.0 KiB
C
// Copyright 2010-2016 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef _ROM_UART_H_
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#define _ROM_UART_H_
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#include "esp_types.h"
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#include "esp_attr.h"
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#include "ets_sys.h"
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#include "esp8266/uart_struct.h"
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#include "esp8266/uart_register.h"
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#include "esp8266/pin_mux_register.h"
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#include "esp8266/eagle_soc.h"
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#include "esp8266/rom_functions.h"
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#include "driver/soc.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/** \defgroup uart_apis, uart configuration and communication related apis
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* @brief uart apis
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*/
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/** @addtogroup uart_apis
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* @{
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*/
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/**
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* @brief Wait until uart tx full empty and the last char send ok.
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*
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* @param uart_no : 0 for UART0, 1 for UART1, 2 for UART2
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*
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* The function defined in ROM code has a bug, so we define the correct version
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* here for compatibility.
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*/
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static inline void IRAM_ATTR uart_tx_wait_idle(uint8_t uart_no) {
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uint32_t tx_bytes;
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uint32_t baudrate, byte_delay_us;
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uart_dev_t *const UART[2] = {&uart0, &uart1};
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uart_dev_t *const uart = UART[uart_no];
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baudrate = (UART_CLK_FREQ / (uart->clk_div.val & 0xFFFFF));
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byte_delay_us = (uint32_t)(10000000 / baudrate);
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do {
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tx_bytes = uart->status.txfifo_cnt;
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/* either tx count or state is non-zero */
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} while (tx_bytes);
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ets_delay_us(byte_delay_us);
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}
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/**
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* @brief Output a char to printf channel, wait until fifo not full.
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*
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* @param None
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*
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* @return OK.
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*/
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STATUS uart_tx_one_char(uint8_t TxChar);
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/**
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* @brief Get an input char from message channel.
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* Please do not call this function in SDK.
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*
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* @param uint8_t *pRxChar : the pointer to store the char.
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*
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* @return OK for successful.
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* FAIL for failed.
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*/
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STATUS uart_rx_one_char(uint8_t *pRxChar);
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/**
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* @brief Get an input string line from message channel.
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* Please do not call this function in SDK.
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*
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* @param uint8_t *pString : the pointer to store the string.
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*
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* @param uint8_t MaxStrlen : the max string length, incude '\0'.
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*
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* @return OK.
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*/
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static inline STATUS UartRxString(uint8_t *pString, uint8_t MaxStrlen)
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{
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int rx_bytes = 0;
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while(1) {
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uint8_t data;
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while (uart_rx_one_char(&data) != OK);
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if (data == '\n' || data == '\r')
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data = '\0';
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pString[rx_bytes++] = data;
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if (data == '\0')
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return OK;
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if (rx_bytes >= MaxStrlen)
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return FAIL;
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}
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return OK;
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}
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/**
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* @}
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*/
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#ifdef __cplusplus
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}
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#endif
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#endif /* _ROM_UART_H_ */
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