【GD32F103】开发板基本测试

/*!

    \file    main.c

    \brief   led spark with systick, USART print and key example



    \version 2014-12-26, V1.0.0, firmware for GD32F10x

    \version 2017-06-20, V2.0.0, firmware for GD32F10x

    \version 2018-07-31, V2.1.0, firmware for GD32F10x

    \version 2020-09-30, V2.2.0, firmware for GD32F10x

*/



/*

    Copyright (c) 2020, 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 "gd32f10x.h"

#include "systick.h"

#include <stdio.h>

#include "main.h"



void delay(void)

{

        int i=0, j = 0;

        

        for(i=0; i<100; i++)

                for(j=0; j<100000; j++);

}



void led_config(void)

{

    /* enable the led clock */

    rcu_periph_clock_enable(RCU_GPIOC);

    /* configure led GPIO port */ 

    gpio_init(GPIOC, GPIO_MODE_OUT_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_14);



    GPIO_BC(GPIOC) = GPIO_PIN_14;

}



void timer_config(void)

{

        /* ----------------------------------------------------------------------------

    TIMER1 Configuration: 

    TIMER1CLK = SystemCoreClock/10800 = 10KHz, the period is 1s(10000/10000 = 1s).

    ---------------------------------------------------------------------------- */

    timer_parameter_struct timer_initpara;



    rcu_periph_clock_enable(RCU_TIMER1);



    timer_deinit(TIMER1);

    /* initialize TIMER init parameter struct */

    timer_struct_para_init(&timer_initpara);

    /* TIMER1 configuration */

    timer_initpara.prescaler         = 10799;

    timer_initpara.alignedmode       = TIMER_COUNTER_EDGE;

    timer_initpara.counterdirection  = TIMER_COUNTER_UP;

    timer_initpara.period            = 9999;

    timer_initpara.clockdivision     = TIMER_CKDIV_DIV1;

    timer_init(TIMER1, &timer_initpara);



    timer_interrupt_flag_clear(TIMER1, TIMER_INT_FLAG_UP);

    timer_interrupt_enable(TIMER1, TIMER_INT_UP);

    timer_enable(TIMER1);

}



void nvic_config(void)

{

    nvic_priority_group_set(NVIC_PRIGROUP_PRE1_SUB3);

    nvic_irq_enable(TIMER1_IRQn, 1, 1);

}



void TIMER1_IRQHandler(void)

{

    if(SET == timer_interrupt_flag_get(TIMER1, TIMER_INT_FLAG_UP)){

        /* clear channel 0 interrupt bit */

        timer_interrupt_flag_clear(TIMER1, TIMER_INT_FLAG_UP);

        gpio_bit_write(GPIOC, GPIO_PIN_14, (bit_status)(1-gpio_input_bit_get(GPIOC, GPIO_PIN_14)));

    }

}



void usart_config(void)

{

    /* enable USART clock */

    rcu_periph_clock_enable(RCU_USART0);

    

        /* enable GPIO clock */

        rcu_periph_clock_enable(RCU_GPIOA);

        

        /* connect port to USARTx_Tx */

        gpio_init(GPIOA, GPIO_MODE_AF_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_9);

        /* connect port to USARTx_Rx */

        gpio_init(GPIOA, GPIO_MODE_IN_FLOATING, GPIO_OSPEED_50MHZ, GPIO_PIN_10);

    

    /* USART configure */

    usart_deinit(USART0);

    usart_baudrate_set(USART0, 115200U);

    usart_word_length_set(USART0, USART_WL_8BIT);

    usart_stop_bit_set(USART0, USART_STB_1BIT);

    usart_parity_config(USART0, USART_PM_NONE);

    usart_hardware_flow_rts_config(USART0, USART_RTS_DISABLE);

    usart_hardware_flow_cts_config(USART0, USART_CTS_DISABLE);

    usart_receive_config(USART0, USART_RECEIVE_ENABLE);

    usart_transmit_config(USART0, USART_TRANSMIT_ENABLE);

    usart_enable(USART0);

}



int fputc(int ch, FILE *f)

{

    usart_data_transmit(USART0, (uint8_t)ch);

    while(RESET == usart_flag_get(USART0, USART_FLAG_TBE));

    return ch;

}



void init(void)

{

        led_config();

        timer_config();

        nvic_config();

        usart_config();

}



/*!

    \brief      main function

    \param[in]  none

    \param[out] none

    \retval     none

*/



int main(void)

{

        init();

        

        delay();

        

        printf("a usart transmit test example!");

        

    while(1)

        {

                GPIO_BOP(GPIOC) = GPIO_PIN_14;

                delay();

                GPIO_BC(GPIOC) = GPIO_PIN_14;

                delay();

    }

}