98 lines
3.6 KiB
C
98 lines
3.6 KiB
C
/*!
|
|
\file main.c
|
|
\brief Auto baudrate detection
|
|
|
|
\version 2021-10-30, V1.0.0, firmware for GD32W51x
|
|
*/
|
|
|
|
/*
|
|
Copyright (c) 2021, GigaDevice Semiconductor Inc.
|
|
|
|
Redistribution and use in source and binary forms, with or without modification,
|
|
are permitted provided that the following conditions are met:
|
|
|
|
1. Redistributions of source code must retain the above copyright notice, this
|
|
list of conditions and the following disclaimer.
|
|
2. Redistributions in binary form must reproduce the above copyright notice,
|
|
this list of conditions and the following disclaimer in the documentation
|
|
and/or other materials provided with the distribution.
|
|
3. Neither the name of the copyright holder nor the names of its contributors
|
|
may be used to endorse or promote products derived from this software without
|
|
specific prior written permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
|
|
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
|
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
|
WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
|
|
OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include "gd32w51x.h"
|
|
#include <stdio.h>
|
|
#include "gd32w515p_eval.h"
|
|
|
|
/*!
|
|
\brief main function
|
|
\param[in] none
|
|
\param[out] none
|
|
\retval none
|
|
*/
|
|
int main(void)
|
|
{
|
|
gd_eval_led_init(LED1);
|
|
|
|
/* USART configuration */
|
|
gd_eval_com_init(EVAL_COM0);
|
|
|
|
printf("\n\rUSART auto baudrate detection example\n\r");
|
|
/* configure the auto baudrate method */
|
|
usart_autobaud_detection_mode_config(EVAL_COM0, USART_ABDM_FTOF);
|
|
/* enable autobaudrate feature */
|
|
usart_autobaud_detection_enable(EVAL_COM0);
|
|
|
|
/* wait until receive enable acknowledge flag is set */
|
|
while(RESET == usart_flag_get(EVAL_COM0, USART_FLAG_REA));
|
|
|
|
/* wait until transmit enable acknowledge flag is set */
|
|
while(RESET == usart_flag_get(EVAL_COM0, USART_FLAG_TEA));
|
|
|
|
/* loop until the end of auto baudrate phase */
|
|
while(RESET == usart_flag_get(EVAL_COM0, USART_FLAG_ABD));
|
|
|
|
/* if auto baudbate error occurred */
|
|
if(RESET == usart_flag_get(EVAL_COM0, USART_FLAG_ABDE)){
|
|
/* wait until RBNE flag is set */
|
|
while(RESET == usart_flag_get(EVAL_COM0, USART_FLAG_RBNE));
|
|
|
|
/* wait until TBE flag is set */
|
|
while(RESET == usart_flag_get(EVAL_COM0, USART_FLAG_TBE));
|
|
|
|
/* USART auto baudrate detection finished successfully */
|
|
gd_eval_led_on(LED1);
|
|
|
|
/* check the transfer complete flag */
|
|
while(RESET == usart_flag_get(EVAL_COM0, USART_FLAG_TC));
|
|
|
|
usart_transmit_config(EVAL_COM0, USART_TRANSMIT_DISABLE);
|
|
usart_receive_config(EVAL_COM0, USART_RECEIVE_DISABLE);
|
|
}
|
|
|
|
/* USART disable */
|
|
usart_disable(EVAL_COM0);
|
|
while(1){
|
|
}
|
|
}
|
|
|
|
/* retarget the C library printf function to the USART */
|
|
int fputc(int ch, FILE *f)
|
|
{
|
|
usart_data_transmit(EVAL_COM0, (uint8_t)ch);
|
|
while(RESET == usart_flag_get(EVAL_COM0, USART_FLAG_TBE));
|
|
return ch;
|
|
}
|