国芯N32G457代替STM32F107驱动LCD显示屏
本帖最后由 tlled 于 2022-4-6 06:57 编辑#申请原创#
测试下使用N32F457芯片代替STM32F107芯片，通过驱动LCD测试来看下移植过程。
一、硬件部分
1.1、N32G457与STM32F107（一样的LQFP100封装）
1.1.1、STM32F107芯片引脚定义
1.1.2、N32G457芯片引脚定义
从引脚定义上看，两款芯片的引脚是完全兼容的。
STM32F107芯片内核是M3，主频最大72MHz。
n32g457芯片内核是M4+FPU，主频可达144MHz。
2、显示屏硬件驱动LCD部分电路
驱动LCD方式是使用16位总线，模拟时序来驱动的，使用到的端口如下：
3、硬件电路焊接对比
3.1、N32G457
3.2、STM32F107
二、程序部分
之前是使用STM32F107的库文件程序来配置驱动设置端口，移植驱动主要是外部端口的配置，移植到N32G457有那些改动，下面开始对比。
2.1、STM32驱动端口的配置
void LCD_Pins_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOE | RCC_APB2Periph_GPIOD , ENABLE);
// DB15--0
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_All;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOE, &GPIO_InitStructure);
//LCD_Pin_WRPB15
//LCD_Pin_RSPB14
//LCD_Pin_CSPB10
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10 | GPIO_Pin_14 |GPIO_Pin_15;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);
//LCD_Pin_RSTPD11
//LCD_Pin_RDPD15
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11 | GPIO_Pin_15;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOD, &GPIO_InitStructure);
//LCD_BKPA3
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_SetBits(GPIOA,GPIO_Pin_3);
}
void ST7789_BUS_OutPut(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
// DE15--0
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_All;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOE, &GPIO_InitStructure);
}
void LCD_DB_AS_InPut(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
// DE15--0
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_All;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOE, &GPIO_InitStructure);
}
2.2、N32G457驱动端口的配置
void LCD_Pins_Config(void)
{
//N32G457设置如下
GPIO_InitType GPIO_InitStructure;
RCC_EnableAPB2PeriphClk(RCC_APB2_PERIPH_GPIOA | RCC_APB2_PERIPH_GPIOB | RCC_APB2_PERIPH_GPIOD |RCC_APB2_PERIPH_GPIOE, ENABLE);
// DB15--0
GPIO_InitStructure.Pin = GPIO_PIN_ALL;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode= GPIO_Mode_Out_PP;
GPIO_InitPeripheral(GPIOE, &GPIO_InitStructure);
//LCD_Pin_WRPB15
//LCD_Pin_RSPB14
//LCD_Pin_CSPB10
GPIO_InitStructure.Pin = GPIO_PIN_10 | GPIO_PIN_14 |GPIO_PIN_15;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitPeripheral(GPIOB, &GPIO_InitStructure);
//LCD_Pin_RSTPD11
//LCD_Pin_RDPD15
GPIO_InitStructure.Pin = GPIO_PIN_11 | GPIO_PIN_15;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitPeripheral(GPIOD, &GPIO_InitStructure);
//LCD_BKPA3
GPIO_InitStructure.Pin = GPIO_PIN_3;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitPeripheral(GPIOA, &GPIO_InitStructure);
GPIO_SetBits(GPIOA,GPIO_PIN_3);
}
void ST7789_BUS_OutPut(void)
{
GPIO_InitType GPIO_InitStructure;
// DB15--0
GPIO_InitStructure.Pin = GPIO_PIN_ALL;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitPeripheral(GPIOE, &GPIO_InitStructure);
}
void LCD_DB_AS_InPut(void)
{
GPIO_InitType GPIO_InitStructure;
// DB15--0
GPIO_InitStructure.Pin = GPIO_PIN_ALL;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_InitPeripheral(GPIOE, &GPIO_InitStructure);
} 从库文件端口配置来看，驱动程序函数定义名称是很相似的，名称定义的大小写有点区别，比如
STM32 -- 使用的引脚定义名称是GPIO_Pin_10
N32G-- 使用的引脚定义名称是GPIO_PIN_10
修改比较容易，程序移植的工作量小。
2.3、显示屏驱动
2.3.1、st7789.c
#include <stdio.h>
#include "main.h"
//#include "lcd.h"
#include "Image.h"
#include "delay.h"
#include "font.h"
#include "st7789.h"
#include "delay.h"
//LCD的画笔颜色和背景色
u16 POINT_COLOR=0x0000; //画笔颜色
u16 BACK_COLOR=0xFFFF;//背景色
//管理LCD重要参数
//默认为竖屏
_lcd_dev lcddev;
//设置LCD显示方向
//dir:0,竖屏；1,横屏
void LCD_Display_Dir(u8 dir)
{
if(dir==0) //竖屏
{
lcddev.dir=0; //竖屏
lcddev.width=240;
lcddev.height=320;
}else //横屏
{
lcddev.dir=1; //横屏
lcddev.width=320;
lcddev.height=240;
}
//LCD_Scan_Dir(DFT_SCAN_DIR); //默认扫描方向
}
void LCD_Pins_Config(void)
{
//N32G457设置如下
GPIO_InitType GPIO_InitStructure;
RCC_EnableAPB2PeriphClk(RCC_APB2_PERIPH_GPIOA | RCC_APB2_PERIPH_GPIOB | RCC_APB2_PERIPH_GPIOD |RCC_APB2_PERIPH_GPIOE, ENABLE);
// DB15--0
GPIO_InitStructure.Pin = GPIO_PIN_ALL;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode= GPIO_Mode_Out_PP;
GPIO_InitPeripheral(GPIOE, &GPIO_InitStructure);
//LCD_Pin_WRPB15
//LCD_Pin_RSPB14
//LCD_Pin_CSPB10
GPIO_InitStructure.Pin = GPIO_PIN_10 | GPIO_PIN_14 |GPIO_PIN_15;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitPeripheral(GPIOB, &GPIO_InitStructure);
//LCD_Pin_RSTPD11
//LCD_Pin_RDPD15
GPIO_InitStructure.Pin = GPIO_PIN_11 | GPIO_PIN_15;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitPeripheral(GPIOD, &GPIO_InitStructure);
//LCD_BKPA3
GPIO_InitStructure.Pin = GPIO_PIN_3;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitPeripheral(GPIOA, &GPIO_InitStructure);
GPIO_SetBits(GPIOA,GPIO_PIN_3);
}
void ST7789_BUS_OutPut(void)
{
GPIO_InitType GPIO_InitStructure;
// DB15--0
GPIO_InitStructure.Pin = GPIO_PIN_ALL;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitPeripheral(GPIOE, &GPIO_InitStructure);
}
void LCD_DB_AS_InPut(void)
{
GPIO_InitType GPIO_InitStructure;
// DB15--0
GPIO_InitStructure.Pin = GPIO_PIN_ALL;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_InitPeripheral(GPIOE, &GPIO_InitStructure);
}
void delay_ms(u16 nms)
{
systick_delay_ms(nms);
}
void LCD_Init(void)
{
LCD_Pins_Config();
}
void TFT_24_7789_Write_Data(u16 dat)
{
LCD_SetRs();//rs=1
LCD_ClrCs();//cs=0
LCD_SetRd();//rd=1
LCD_ClrWr();//wr=0
GPIO_Write(GPIOE, dat);
LCD_SetWr(); //wr=1
LCD_SetCs(); //cs=1
}
void TFT_24_7789_Write_Command(u16 cmd)
{
LCD_ClrCs();//cs=0
LCD_ClrRs();//rs=0
LCD_SetRd();//rd=1
LCD_ClrWr();//wr=0
GPIO_Write(GPIOE, cmd);
LCD_SetWr(); //wr=1
LCD_SetCs(); //cs=1
LCD_SetRs(); //rs=1
}
void ST7789_WriteData(u16 dat)
{
LCD_SetRs();//rs=1
LCD_ClrCs();//cs=0
LCD_SetRd();//rd=1
LCD_ClrWr();//wr=0
GPIO_Write(GPIOE, dat);
LCD_SetWr(); //wr=1
LCD_SetCs(); //cs=1
}
void ST7789_WriteCommand(u16 cmd)
{
LCD_ClrCs();//cs=0
LCD_ClrRs();//rs=0
LCD_SetRd();//rd=1
LCD_ClrWr();//wr=0
GPIO_Write(GPIOE, cmd);
LCD_SetWr(); //wr=1
LCD_SetCs(); //cs=1
LCD_SetRs(); //rs=1
}
//void TFT_24_7789_Read_Data(void)
//{
// uint16_t id=0;
// TFT_24_7789_Write_Command(0x0004);
// LCD_DB_AS_InPut();
//
// GPIO_ResetBits(GPIOB, GPIO_Pin_10);//CS=0
// GPIO_SetBits(GPIOB, GPIO_Pin_14);//RS=1
// GPIO_SetBits(GPIOB, GPIO_Pin_15); //WR=1
//
// //GPIO_SetBits(GPIOD, GPIO_Pin_15); //RD=1
//GPIO_ResetBits(GPIOD, GPIO_Pin_15); //RD=0
// //GPIO_Write(GPIOE, dat);//when using 16-bit interface (DB17:10,DB8:1)//when using 8-bit interface (DB17:10)
// id=LCD_Read();
// delay_ms(1);
// GPIO_SetBits(GPIOD, GPIO_Pin_15); //RD=1;
// delay_ms(1);
// printf("\n\r ######DeviceIdCode = 0x%x ###### ", id);
// LCD_DB_AS_OutPut();
//}
static void ST7789_Reset(void)
{
LCD_SetRst();
delay_ms(1);
LCD_ClrRst();
delay_ms(100); // Delayms 10ms // This delay time is necessary
LCD_SetRst();
delay_ms(120); // Delayms 120 ms
}
void ST7789_Init(void)
{
int n;
LCD_Pins_Config();
ST7789_Reset();
ST7789_WriteCommand(0x0011); //exit SLEEP mode
delay_ms(120);
ST7789_WriteCommand(0x0036);
ST7789_WriteData(0x0060); //MADCTL: memory data access control
ST7789_WriteCommand(0x003A);
ST7789_WriteData(0x0005); //COLMOD: Interface Pixel format *** I use 262K-colors in 18bit/pixel format when using 8-bit interface to allow 3-bytes per pixel
// TFT_24_7789_Write_Command(0x003A);TFT_24_7789_Write_Data(0x0055);//COLMOD: Interface Pixel format*** I use 65K-colors in 16bit/pixel (5-6-5) format when using 16-bit interface to allow 1-byte per pixel
ST7789_WriteCommand(0x00B2);
ST7789_WriteData(0x000C);
ST7789_WriteData(0x000C);
ST7789_WriteData(0x0000);
ST7789_WriteData(0x0033);
ST7789_WriteData(0x0033); //PORCTRK: Porch setting
ST7789_WriteCommand(0x00B7);
ST7789_WriteData(0x0035); //GCTRL: Gate Control
ST7789_WriteCommand(0x00BB);
ST7789_WriteData(0x001c); //VCOMS: VCOM setting
ST7789_WriteCommand(0x00C0);
ST7789_WriteData(0x002C); //LCMCTRL: LCM Control
ST7789_WriteCommand(0x00C2);
ST7789_WriteData(0x0001);
ST7789_WriteData(0x00FF); //VDVVRHEN: VDV and VRH Command Enable
ST7789_WriteCommand(0x00C3);
ST7789_WriteData(0x000B); //VRHS: VRH Set
ST7789_WriteCommand(0x00C4);
ST7789_WriteData(0x0020); //VDVS: VDV Set
ST7789_WriteCommand(0x00C6);
ST7789_WriteData(0x000F); //FRCTRL2: Frame Rate control in normal mode
ST7789_WriteCommand(0x00D0);
ST7789_WriteData(0x00A4);
ST7789_WriteData(0x00A1); //PWCTRL1: Power Control 1
ST7789_WriteCommand(0x00E0);
ST7789_WriteData(0x00D0);
ST7789_WriteData(0x0000);
ST7789_WriteData(0x0003);
ST7789_WriteData(0x0009);
ST7789_WriteData(0x0013);
ST7789_WriteData(0x001c);
ST7789_WriteData(0x003a);
ST7789_WriteData(0x0055);
ST7789_WriteData(0x0048);
ST7789_WriteData(0x0018);
ST7789_WriteData(0x0012);
ST7789_WriteData(0x000e);
ST7789_WriteData(0x0019);
ST7789_WriteData(0x001e); //PVGAMCTRL: Positive Voltage Gamma control
ST7789_WriteCommand(0x00E1);
ST7789_WriteData(0x00D0);
ST7789_WriteData(0x0000);
ST7789_WriteData(0x0003);
ST7789_WriteData(0x0009);
ST7789_WriteData(0x0005);
ST7789_WriteData(0x0025);
ST7789_WriteData(0x003a);
ST7789_WriteData(0x0055);
ST7789_WriteData(0x0050);
ST7789_WriteData(0x003d);
ST7789_WriteData(0x001c);
ST7789_WriteData(0x001d);
ST7789_WriteData(0x001d);
ST7789_WriteData(0x001e);
ST7789_WriteCommand(0x0029); //display ON
ST7789_WriteCommand(0x002c);
LCD_Display_Dir(1);
}
void LCD_WriteOneDot(u16 color)
{
TFT_24_7789_Write_Data(color);
}
void Lcd_SetBox(u16 xStart,u16 yStart,u16 xlong,u16 ylong)
{
u16 xEnd=0, yEnd=0;
xEnd=xStart+xlong-1;
yEnd=yStart+ylong-1;
TFT_24_7789_Write_Command(0x2a);
TFT_24_7789_Write_Data(xStart>>8);
TFT_24_7789_Write_Data(xStart);
TFT_24_7789_Write_Data(xEnd>>8);
TFT_24_7789_Write_Data(xEnd);
TFT_24_7789_Write_Command(0x2b);
TFT_24_7789_Write_Data(yStart>>8);
TFT_24_7789_Write_Data(yStart);
TFT_24_7789_Write_Data(yEnd>>8);
TFT_24_7789_Write_Data(yEnd);
TFT_24_7789_Write_Command(0x2c);
}
void Lcd_SetBox1(u16 xStart,u16 xEnd,u16 yStart,u16 yEnd)
{
TFT_24_7789_Write_Command(0x2a);
TFT_24_7789_Write_Data(xStart>>8);
TFT_24_7789_Write_Data(xStart);
TFT_24_7789_Write_Data(xEnd>>8);
TFT_24_7789_Write_Data(xEnd);
TFT_24_7789_Write_Command(0x2b);
TFT_24_7789_Write_Data(yStart>>8);
TFT_24_7789_Write_Data(yStart);
TFT_24_7789_Write_Data(yEnd>>8);
TFT_24_7789_Write_Data(yEnd);
TFT_24_7789_Write_Command(0x2c);
}
void LCD_Clear(u16 Color)
{
u32 i;
Lcd_SetBox(0,0,320,240);
for(i=0;i<78900;i++){
LCD_WriteOneDot(Color);
}
}
void LCD_Picture(u16 x,u16 y,u16 width,u16 height,const unsignedchar *color)
{
u16 i,j,temp;
j=width*height;
Lcd_SetBox(x,y,width,height);
for(i=0;i<j;i++)
{
temp=color<<8&0xFF00;
temp+=color;
LCD_WriteOneDot(temp);
}
}
void LCD_Clear1(u16 xStart,u16 yStart,u16 xlong,u16 ylong,u16 Color)
{
u32 i,j;
j=xlong*ylong;
Lcd_SetBox(xStart,yStart,xlong,ylong);
for(i=0;i<j;i++){
LCD_WriteOneDot(Color);
}
}
/**********************************************
函数名：LCD_write_english
功能：选定Lcd上写一个英文或数字
入口参数：data 要写的字符
color 字符的颜色
xcolor 字符的背景色
size字体的大小
返回值：无
***********************************************/
static void LCD_write_english(u8 data,u16 color,u16 xcolor ,u8 mode)//写字符
{
u8 i=0,j=0,n=0;
u8 avl=0;
data -=32;
for (i=0;i<120;i++) //为 20x40字库
{
avl=english;
for (j=0;j<8;j++)
{
n++;
if(avl&0x80)LCD_WriteOneDot(color);
else if(mode==0) LCD_WriteOneDot(xcolor);
avl<<=1;
if(n>19) {
n=0;
break;
}//部分字体如英文20*40，形成的字库3个8位一组，每一组最后4位不显示，用该语句进行判断有几位不需要显示
}
}
}
void LCD_write_english_string(u16 x, u16 y, char *str,u8 mode)//英文字符串显示
{
u16 k = 0;
while ((*str<='~')&&(*str>=' '))
{
Lcd_SetBox(x+k,y,20,40);
LCD_write_english( *str,WORDCOLOR,BACKCOLOR, mode);
k+=20;
str++;
}
}
static void LCD_write_chinese(u16 data, u16 color, u16 xcolor,u8 mode )//写字符
{
u8 i=0,j=0;
u32 avl=0;
//data -=' '; //（ASCII）- 32 = 字库数组行数
//===========为 48x24字库 32*16=512个像素点保存形式为8位数据故有512/8=64个 每一位代表“字”或“背景”然后再把每个坐标的颜色显示出来==========要是显示在什么位置 显示的大小为什么是32X16看LCD_write_english_string函数其中有个Lcd_SetBox
for (i=0;i<128;i++)
{
avl=Chinese; //取第一个8位
for (j=0;j<8;j++) //两个8位组成一个16位循环16次完成16个点的判断 每行显示几个像素点由函数LCD_write_english_string的输入参数定
{
if(avl&0x80)LCD_WriteOneDot(color);
else if(mode==0) LCD_WriteOneDot(xcolor); //“0”显示为背景部分 即 背景颜色
avl<<=1;
}
}
}
void LCD_write_chinese_string(u16 x, u16 y,u16 address,u16 len,u8 mode)
{
int i;
u16 k = 0;
for(i=0;i<len;i++)
{
Lcd_SetBox(x+k,y,32,32);
LCD_write_chinese(address,WORDCOLOR,BACKCOLOR, mode);
k+=32;
address++;
}
}
void ST7789_SetPoint(u16 x,u16 y,u16 color)
{
Lcd_SetBox1(x,x+1,y,y+1);
LCD_WriteOneDot(color);
}
//在指定位置显示一个字符
//x,y:起始坐标
//num:要显示的字符:" "--->"~"
//size:字体大小 12/16/24
//mode:叠加方式(1)还是非叠加方式(0)
void LCD_ShowChar(u16 x,u16 y,u8 num,u8 size,u8 mode)
{
u8 temp,t1,t;
u16 y0=y;
u8 csize=(size/8+((size%8)?1:0))*(size/2); //得到字体一个字符对应点阵集所占的字节数
num=num-' ';//得到偏移后的值（ASCII字库是从空格开始取模，所以-' '就是对应字符的字库）
for(t=0;t<csize;t++)
{
if(size==12)temp=asc2_1206; //调用1206字体
else if(size==16)temp=asc2_1608; //调用1608字体
else if(size==24)temp=asc2_2412; //调用2412字体
else return; //没有的字库
for(t1=0;t1<8;t1++)
{
if(temp&0x80)ST7789_SetPoint(x,y,POINT_COLOR);
else if(mode==0)ST7789_SetPoint(x,y,BACK_COLOR);
temp<<=1;
y++;
if(y>=lcddev.height)return; //超区域了
if((y-y0)==size)
{
y=y0;
x++;
if(x>=lcddev.width)return; //超区域了
break;
}
}
}
}
//显示字符串
//x,y:起点坐标
//width,height:区域大小
//size:字体大小
//*p:字符串起始地址
void LCD_ShowString(u16 x,u16 y,u16 width,u16 height,u8 size,u8 *p)
{
u8 x0=x;
width+=x;
height+=y;
while((*p<='~')&&(*p>=' '))//判断是不是非法字符!
{
if(x>=width){x=x0;y+=size;}
if(y>=height)break;//退出
LCD_ShowChar(x,y,*p,size,0);
x+=size/2;
p++;
}
}
2.3.2、main.c
#include "main.h"
#include <stdio.h>
#include <stdint.h>
#include "led.h"
#include "delay.h"
#include "st7789.h"
int main(void)
{
LED_Init();
ST7789_Init();
POINT_COLOR=RED;
LCD_Clear(WHITE);
LCD_ShowString(30,40,210,24,24,"N32G457");
LCD_ShowString(30,70,200,16,16,"TFTLCD TEST");
LCD_ShowString(30,90,200,16,16,"tlled@NATION");
LCD_ShowString(30,110,200,16,16,"ST7789");
LCD_ShowString(30,130,200,12,12,"2022/04/05");
LCD_ShowString(30,150,210,24,24,"www.nationstech.com");
while (1)
{
led0_on();systick_delay_ms(500);
led0_off();systick_delay_ms(500);
}
}
/**
* @}
*/
2.4、程序源码：
三、运行显示内容
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