【GD32F310开发板试用】驱动8位动态LED显示

这篇测试下定时器的使用，使用定时器1动态驱动LED数码管。

一、硬件电路

1.1、数码管的码段使用74HC245驱动

1.2、片选使用74HC138驱动

1.3、开发板使用这些端口，PA-PA7对应码段，PB4-PB6对应片选

二、程序

2.1、定时器1程序
定时器1配置为1ms，定时中断执行数码管驱动程序

#include "gd32f3x0.h"
#include "gd32f310g_start.h"
#include "systick.h"

void init_timer(void)
{
    timer_parameter_struct timer_initpara;
    
    rcu_periph_clock_enable(RCU_TIMER1);
    timer_deinit(TIMER1);
    
    timer_initpara.prescaler         = 71;
    timer_initpara.alignedmode       = TIMER_COUNTER_EDGE;
    timer_initpara.counterdirection  = TIMER_COUNTER_UP;
    timer_initpara.period            = 999;
    timer_initpara.clockdivision     = TIMER_CKDIV_DIV1;
    timer_initpara.repetitioncounter = 0;
    timer_init(TIMER1, &timer_initpara);
    nvic_priority_group_set(NVIC_PRIGROUP_PRE1_SUB3);
    nvic_irq_enable(TIMER1_IRQn,0,1);
    timer_interrupt_enable(TIMER1,TIMER_INT_UP);
    
    timer_auto_reload_shadow_enable(TIMER1);
    timer_enable(TIMER1);    
}

2.2、定时器中断

uint16_t timer_cnt=0;
void TIMER1_IRQHandler(void)
{
    timer_flag_clear(TIMER1,TIMER_FLAG_UP);
    timer_cnt++;
    //if(timer_cnt>1)
    {
        timer_cnt=0;
        //leds_test();
        //led1_tog();
        leddisp();
    }
}

2.3、数码管驱动程序
在定时器1中断执行，动态扫描驱动LED数码管。

#include "gd32f3x0.h"

uint8_t tim_disp_js=0;
uint8_t tim_cnt=0;
uint16_t js=0;

const uint8_t shumag[]  = {0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0x00};
const uint8_t shumagd[] = {0x40,0x79,0x24,0x30,0x19,0x12,0x02,0x78,0x00,0x10};
const uint8_t dispbit[8]={0x70,0x60,0x50,0x40,0x30,0x20,0x10,0x00};
uint8_t disp[8]={0,0,0,0,0,0,0,0};

void init_ledd(void)
{
    uint8_t pt;
    rcu_periph_clock_enable(RCU_GPIOA);
    rcu_periph_clock_enable(RCU_GPIOB);
    
    gpio_mode_set(GPIOA, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3|GPIO_PIN_4|GPIO_PIN_5|GPIO_PIN_6|GPIO_PIN_7);
    gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3|GPIO_PIN_4|GPIO_PIN_5|GPIO_PIN_6|GPIO_PIN_7);
  
    gpio_mode_set(GPIOB, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO_PIN_7|GPIO_PIN_4|GPIO_PIN_5|GPIO_PIN_6);
    gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_7|GPIO_PIN_4|GPIO_PIN_5|GPIO_PIN_6);

    
    
    pt=gpio_output_port_get(GPIOA);
    gpio_port_write(GPIOA,(pt|0x00ff));
    
    pt=gpio_output_port_get(GPIOB);
    gpio_port_write(GPIOB,(pt|0x000f));

}

//leddisp bit
void led_write_disbit(uint8_t ds)
{
    uint8_t pt;
    pt=gpio_output_port_get(GPIOB);
    gpio_port_write(GPIOB,(pt&0xFF0f)|dispbit[ds]);
}

//leddisp dat
void led_write_disdat(uint8_t ds)
{
    uint8_t pt;
    pt=gpio_output_port_get(GPIOA);
    gpio_port_write(GPIOA,(pt&0xFF00)|shumag[ds]);
}

//leddisp datp
void led_write_disdatp(uint8_t ds)
{
    uint8_t pt;
    pt=gpio_output_port_get(GPIOA);
    gpio_port_write(GPIOA,(pt&0xFF00)|shumagd[ds]);
}

void leddisp(void)
{
    tim_cnt++;
    if(tim_cnt>100)
    {
        tim_cnt=0;
        js++;
        if(js>65500)
        {
            js=0;
        }
        disp[4]=js/10000;
        disp[3]=(js%10000)/1000;
        disp[2]=((js%10000)%1000)/100;
        disp[1]=(((js%10000)%1000)%100)/10;
        disp[0]=(((js%10000)%1000)%100)%10;
    }
    
    
    tim_disp_js++;
    if(tim_disp_js>7)
    {
        tim_disp_js=0;
    }
    
    led_write_disdat(10);
    led_write_disbit(tim_disp_js);
    
    switch (tim_disp_js)
    {
        case 0:
            led_write_disdat(disp[0]);
            break;
        case 1:
            led_write_disdat(disp[1]);
            break;
        case 2:
            led_write_disdat(disp[2]);
            break;
        case 3:
            led_write_disdat(disp[3]);
            break;
        case 4:
            led_write_disdat(disp[4]);
            break;
        case 5:
            led_write_disdat(disp[5]);
            break;
        case 6:
            led_write_disdat(disp[6]);
            break;
        case 7:
            led_write_disdat(disp[7]);
            break;
        default:
            break;
    }    
}

四、运行

https://www.bilibili.com/vide...