程序博客网 > 3d美工

uart(4)-输入命令来控制灯亮灭

来源：互联网 发布：3d美工 编辑：程序博客网 时间：2024/06/05 08:32

输入一个"led_on",就打开四展灯；输入一个"led_off",就关闭四展灯；

************************************************************************************

test.c文件如下：

#include "uart.h"
void putchar(unsigned char s1);
void puts(char *s1);
unsigned char getchar();
void gets(unsigned char *buff);
void led_on();
void led_off();
int my_strcmp(char *s1,char *s2);
void *my_memset(char *s,int c,unsigned int n);
int (*printf)(char *,...) = (void *)0x57e11d4c;
int main()
{

char c;

char buffer[300];

char *buff = my_memset(buffer,0,300);



//*(volatile unsigned long *)0x56000000 = hander_irq;

    //cpsr打开中断

          __asm__ __volatile__(
                  "mrs r0,cpsr\n"
                  "bic r0,r0,#0x80\n"
                  "msr cpsr,r0\n"
                  :
                  :
                  :"r0","memory"
          );

                  "mrs r0,cpsr\n"

                  "bic r0,r0,#0x80\n"

                  "msr cpsr,r0\n"

                  :

                  :

                  :"r0","memory"

          );

          //led

          GPMCON = (1<<0)|(1<<4)|(1<<8)|(1<<12);

          GPMDAT = 0xf;


//URAT

ULCON0 = 3;

UCON0 = 1|(1<<2)|(2<<10);

/*

DIV_VAL = (PCLK / (bps x 16 ) ) −1

=(66M/(115200*16))-1

=34.8

x/16 = 0.8

x = 16*0.8

x = 12.8 ~ 13

*/

UBRDIV0 = 34;

UDIVSLOT0 =0xDFDD;



puts("-------------my_uboot---------------\n");

while(1)

{

puts("you-boot #\n");

// c =getchar();

// putchar(c);

gets(buff);

if(!my_strcmp("led_on",buff))

led_on();

if(!my_strcmp("led_off",buff))

led_off();

puts(buff);

putchar('\r');

putchar('\n');

buff = my_memset(buffer,0,300);


}


return 0;



}
void putchar(unsigned char s1){

while(1){

if(UTRSTAT0&(1<<1))//when empty ,we write 

break;

}

UTXH0 = s1;

}
void puts(char *s1){

while(*s1)

{

if(*s1 == '\n')

putchar('\r');

putchar(*s1++); 

}

}


unsigned char getchar(){

unsigned char c=0;

while(1)

{

if(UTRSTAT0 & (1<<0))

break;

}

c = URXH0;

return c;

}
void gets(unsigned char *buff){

char c = 0;

while(1)

{

c = getchar();

if(c == '\r')

break;

*buff++  = c;

}

//*buff = '\n';

}
void led_on(){
         GPMDAT = 0;
}
void led_off(){
        GPMDAT = 0xf;
}
int my_strcmp(char *s1,char *s2){


while((*s1++ == *s2++)&&(*s1 != 0)&&(*s2 != 0))

{

;

}

if((*s1 == 0)&&(*s2== 0))

return 0;

return 1;

}
void *my_memset(char *s,int c,unsigned int n)
{

unsigned int i=0;

while(i <= n)

{

*(s+i) = c;

i++;

}

return s;

}


*******************************************************************************************

vector.s文件如下：

b reset

b und

b swi

b pre_abt

b data_abt

.word 0x0

b irq

b firq





reset:
und:

mov sp,#0x56000000

mov ip,sp

stmdb sp!,{fp,ip,lr}

sub fp,ip,#4


ldr r0,=string_und

ldr r1,printf

blx r1




mov sp,#0x56000000

ldmdb sp,{fp,sp,pc}^

swi:


mov sp,#0x56000000

mov ip,sp

stmdb sp!,{fp,ip,lr}

sub fp,ip,#4


ldr r0,=string_swi

ldr r1,printf

blx r1




mov sp,#0x56000000

ldmdb sp,{fp,sp,pc}^

pre_abt:


data_abt:

mov sp,#0x56000000

mov ip,sp

sub lr,lr,#4

stmdb sp!,{fp,ip,lr}

sub fp,ip,#4


ldr r0,=string_pre_abt

ldr r1,printf

blx r1



mov sp,#0x56000000

ldmdb sp,{fp,sp,pc}^

irq:

mov sp,#0x56000000

mov ip,sp

sub lr,lr,#4

stmdb sp!,{fp,ip,lr}

sub fp,ip,#4



mov r0,#0x56000000

ldr r1,[r0]

blx r1





mov sp,#0x56000000

ldmdb sp,{fp,sp,pc}^



firq:
printf:

.word 0x57e11d4c



string_und:

.asciz "hello undefine \n"

.align 2

string_swi:

.asciz "hello swi\n"

.align 2

string_pre_abt:

.asciz "hell data_abt\n"

.align 2

string_irq:

.asciz "hello irq ,wang wang wang  \n"

.align 2

*******************************************************************************

uart.h文件如下：
//interrupt
#define VIC0INTENABLE (*(volatile unsigned long *)0x71200010)
#define VIC0INTSELECT (*(volatile unsigned long *)0x7120000C)
#define VICxIRQSTATUS   (*(volatile unsigned long *)0x71200000)
#define VICxRAWINTR (*(volatile unsigned long *)0x71200008)


//模拟watdong
#define VIC0SOFTINT (*(volatile unsigned long *)0x71200018)
#define VIC0SOFTINTCLAR (*(volatile unsigned long *)0x7120001C)
//watdog
#define WTCON    (*(volatile unsigned long *)0x7E004000) 
#define WTDAT    (*(volatile unsigned long *)0x7E004004) 
#define WTCNT    (*(volatile unsigned long *)0x7E004008) 
#define WTCLRINT (*(volatile unsigned long *)0x7E00400C)
//led
#define GPMCON (*(volatile unsigned long *)0x7F008820)
#define GPMDAT (*(volatile unsigned long *)0x7F008824)
//key
#define GPNCON (*(volatile unsigned long *)0x7F008830)
#define GPNDAT (*(volatile unsigned long *)0x7F008834)
//ex_interrupt
#define EINT0CON0    (*(volatile unsigned long *)0x7F008900)
#define EINT0CON1    (*(volatile unsigned long *)0x7F008904)
#define EINT0MASK     (*(volatile unsigned long *)0x7F008920)
#define EINT0PEND    (*(volatile unsigned long *)0x7F008924)
//clock
#define APLLLOCK (*(volatile unsigned long *)0x7E00F000) 
#define MPLLLOCK (*(volatile unsigned long *)0x7E00F004) 
#define EPLLLOCK (*(volatile unsigned long *)0x7E00F008) 
#define APLLCON  (*(volatile unsigned long *)0x7E00F00C) 
#define MPLLCON  (*(volatile unsigned long *)0x7E00F010) 
#define EPLLCON0 (*(volatile unsigned long *)0x7E00F014) 
#define EPLLCON1 (*(volatile unsigned long *)0x7E00F018)




#define CLKSRC       (*(volatile unsigned long *)0x7E00F01C )
#define CLKDIV0      (*(volatile unsigned long *)0x7E00F020 )
#define CLKDIV1      (*(volatile unsigned long *)0x7E00F024 )
#define CLKDIV2      (*(volatile unsigned long *)0x7E00F028 )
#define CLKOUT       (*(volatile unsigned long *)0x7E00F02C )
#define HCLKGATE     (*(volatile unsigned long *)0x7E00F030 )
#define PCLKGATE     (*(volatile unsigned long *)0x7E00F034 )
#define SCLKGATE     (*(volatile unsigned long *)0x7E00F038 )
#define MEM0CLK_GATE (*(volatile unsigned long *)0x7E00F03C)
#define MISCCON (*(volatile unsigned long*)0x7E00F839)


//UART
#define ULCON0   (*(volatile unsigned long *)0x7F005000) 
#define  UCON0   (*(volatile unsigned long *)0x7F005004) 
#define UFCON0   (*(volatile unsigned long *)0x7F005008) 
#define UMCON0   (*(volatile unsigned long *)0x7F00500C) 
#define UTRSTAT0 (*(volatile unsigned long *) 0x7F005010) 
#define UERSTAT0 (*(volatile unsigned long *) 0x7F005014) 
#define UFSTAT0  (*(volatile unsigned long *)0x7F005018) 
#define UMSTAT0  (*(volatile unsigned long *)0x7F00501C) 
#define  UTXH0   (*(volatile unsigned long *)0x7F005020) 
#define  URXH0   (*(volatile unsigned long *)0x7F005024) 
#define UBRDIV0  (*(volatile unsigned long *)0x7F005028) 
#define UDIVSLOT0 (*(volatile unsigned long *)0x7F00502C) 
#define  UINTP0  (*(volatile unsigned long *)0x7F005030) 
#define UINTSP0  (*(volatile unsigned long *)0x7F005034)
#define  UINTM0  (*(volatile unsigned long *)0x7F005038)

*****************************************************************************************

makefile文件如下：





all:

arm-none-linux-gnueabi-gcc -c test.c -o test.o

arm-none-linux-gnueabi-ld -Ttext=0x50000000 test.o -o test

arm-none-linux-gnueabi-objcopy -Ielf32-littlearm -O binary test test.bin

cp test.bin /tftpboot/

clean:

rm -rf *.o *.bin test vector  /tftpboot/*.bin

3d美工 3d美工
原创粉丝点击
热门IT博客
安捷伦程控电源编程安捷伦程控电源编程
mac os10下载mac os10下载
linux下挂载硬盘
士兵突击老a原型 知乎
java拉姆达表达式
mysql教材推荐
linux reboot重启失败
马刺vs小牛数据
多益网络招聘要求
java字符数组排序
c语言怎么输入数组
mysql 在表中添加数据
鹏业软件售后电话
智络软件下载
国内数据防泄漏产品
淘宝手机端模板下载
人之无情 乃可至于是乎
adams软件正版费用
java逆波兰表达式
淘宝头条写手赚钱吗
热门问题 老师的惩罚 人脸识别 我在镇武司摸鱼那些年 重生之率土为王 我在大康的咸鱼生活 盘龙之生命进化 天生仙种 凡人之先天五行 春回大明朝 姑娘不必设防，我是瞎子 瘦小肚腩 7日瘦身汤 減 洋葱减肥 月经减肥 喝什么果汁减肥 减肥吃什么水果 怎样瘦手指 人胖了怎么减肥 吃啥能减肥 怎样瘦手臂 爬楼梯可以减肥吗 如何减去小肚腩 拉肚子减肥 怎么减掉双下巴 高中生如何减肥 瘦腿霜怎么用 减肥网 肚皮舞能减肥吗 吃水果减肥 快速瘦腰 减肥跑步的正确方法 喝水都胖的人怎么减肥 脂肪怎么减掉 减肥一天摄入多少热量 如何消除大肚腩 如何跑步减肥 生完孩子怎么减肥 蜂蜜怎么减肥 如何减肥 全身减肥的秘诀 洛神花茶减肥 如何瘦啤酒肚 为什么会胖 减肥怎么控制饮食 减掉小肚子 如何让脸变瘦 辣椒能减肥吗 如何消除腹部脂肪 怎么瘦啤酒肚 面部整形大概多少钱 怎么样才能瘦肚子上的赘肉

程序博客网，程序员的互联网技术博客家园。csdn论坛精品 msdn技术资料都在这里