175 lines
6.5 KiB
C
175 lines
6.5 KiB
C
/*!
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\file main.c
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\brief USART HalfDuplex transmitter and receiver
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\version 2021-10-30, V1.0.0, firmware for GD32W51x
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*/
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/*
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Copyright (c) 2021, GigaDevice Semiconductor Inc.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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3. Neither the name of the copyright holder nor the names of its contributors
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may be used to endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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OF SUCH DAMAGE.
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*/
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#include "gd32w51x.h"
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#include <stdio.h>
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#include "gd32w515p_eval.h"
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#define ARRAYNUM(arr_nanme) (uint32_t)(sizeof(arr_nanme) / sizeof(*(arr_nanme)))
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#define TRANSMIT_SIZE0 (ARRAYNUM(transmitter_buffer0) - 1)
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#define TRANSMIT_SIZE1 (ARRAYNUM(transmitter_buffer1) - 1)
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uint8_t transmitter_buffer0[] = "\n\ra usart half-duplex test example!\n\r";
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uint8_t transmitter_buffer1[] = "\n\ra usart half-duplex test example!\n\r";
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uint8_t receiver_buffer0[TRANSMIT_SIZE1];
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uint8_t receiver_buffer1[TRANSMIT_SIZE0];
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uint8_t transfersize0 = TRANSMIT_SIZE0;
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uint8_t transfersize1 = TRANSMIT_SIZE1;
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__IO uint8_t txcount0 = 0;
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__IO uint16_t rxcount0 = 0;
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__IO uint8_t txcount1 = 0;
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__IO uint16_t rxcount1 = 0;
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ErrStatus state1 = ERROR;
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ErrStatus state2 = ERROR;
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ErrStatus memory_compare(uint8_t* src, uint8_t* dst, uint16_t length);
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void com_usart_init(void);
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/*!
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\brief main function
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\param[in] none
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\param[out] none
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\retval none
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*/
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int main(void)
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{
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gd_eval_led_init(LED1);
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gd_eval_led_init(LED2);
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com_usart_init();
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/* USART0 transmit and USART1 receive*/
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usart_data_receive(USART1);
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while(transfersize0--){
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/* wait until end of transmit */
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while(RESET == usart_flag_get(USART0, USART_FLAG_TBE));
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usart_data_transmit(USART0, transmitter_buffer0[txcount0++]);
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while(RESET == usart_flag_get(USART1, USART_FLAG_RBNE));
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/* store the received byte in the receiver_buffer1 */
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receiver_buffer1[rxcount0++] = usart_data_receive(USART1);
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}
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usart_data_receive(USART0);
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/* USART1 transmit and USART0 receive*/
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while(transfersize1--){
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/* wait until end of transmit */
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while(RESET == usart_flag_get(USART1, USART_FLAG_TBE));
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usart_data_transmit(USART1, transmitter_buffer1[txcount1++]);
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while(RESET == usart_flag_get(USART0, USART_FLAG_RBNE));
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/* store the received byte in the receiver_buffer0 */
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receiver_buffer0[rxcount1++] = usart_data_receive(USART0);
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}
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/* compare the received data with the send ones */
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state1 = memory_compare(transmitter_buffer0, receiver_buffer1, TRANSMIT_SIZE0);
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state2 = memory_compare(transmitter_buffer1, receiver_buffer0, TRANSMIT_SIZE1);
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if(SUCCESS == state1){
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/* if the data transmitted from USART0 and received by USART1 are the same */
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gd_eval_led_on(LED1);
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}else{
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/* if the data transmitted from USART0 and received by USART1 are not the same */
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gd_eval_led_off(LED1);
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}
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if(SUCCESS == state2){
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/* if the data transmitted from USART1 and received by USART0 are the same */
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gd_eval_led_on(LED2);
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}else{
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/* if the data transmitted from USART1 and received by USART0 are not the same */
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gd_eval_led_off(LED2);
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}
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while(1)
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{
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}
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}
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/*!
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\brief configure COM port
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\param[in] none
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\param[out] none
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\retval none
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*/
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void com_usart_init(void)
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{
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/* enable USART and GPIOA clock */
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rcu_periph_clock_enable(RCU_GPIOA);
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rcu_periph_clock_enable(RCU_USART0);
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rcu_periph_clock_enable(RCU_USART1);
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/* configure the USART0 Tx pin and USART1 Tx pin */
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gpio_af_set(GPIOA, GPIO_AF_7, GPIO_PIN_2);
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gpio_af_set(GPIOA, GPIO_AF_7, GPIO_PIN_9);
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/* configure USART0 Tx as alternate function push-pull */
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gpio_mode_set(GPIOA, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_9);
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gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_25MHZ, GPIO_PIN_9);
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/* configure USART1 Tx as alternate function push-pull */
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gpio_mode_set(GPIOA, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_2);
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gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_25MHZ, GPIO_PIN_2);
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/* USART0 and USART1 baudrate configuration */
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usart_baudrate_set(USART0, 115200);
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usart_baudrate_set(USART1, 115200);
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/* enable USART0 Half Duplex Mode */
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usart_halfduplex_enable(USART0);
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/* enable USART1 Half Duplex Mode */
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usart_halfduplex_enable(USART1);
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/* configure USART transmitter and receiver */
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usart_transmit_config(USART0, USART_TRANSMIT_ENABLE);
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usart_receive_config(USART0, USART_RECEIVE_ENABLE);
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usart_transmit_config(USART1, USART_TRANSMIT_ENABLE);
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usart_receive_config(USART1, USART_RECEIVE_ENABLE);
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/* enable USART */
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usart_enable(USART0);
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usart_enable(USART1);
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}
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/*!
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\brief memory compare function
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\param[in] src : source data
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\param[in] dst : destination data
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\param[in] length : the compare data length
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\param[out] none
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\retval ErrStatus : ERROR or SUCCESS
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*/
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ErrStatus memory_compare(uint8_t* src, uint8_t* dst, uint16_t length)
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{
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while(length--){
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if (*src++ != *dst++){
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return ERROR;
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}
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}
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return SUCCESS;
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}
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