更新时间:2022-09-28 14:47:55
开发环境
1、硬件平台:FS2410
2、主机:Ubuntu 12.04
ADC寄存器配置
1、初始化ADC(ADCCON)
设置预分频,预分频因子,选择A/D转换通道,并选择正常模式且启动转换
2、判断转换是否结束(ADCCON[5])
3、读取转换结果(ADCDATn)
串口的初始化
见《串口通信·FS2410》:http://infohacker.blog.51cto.com/6751239/1223137
源代码
//adc.c
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|
#include "2410addr.h" //头文件,包含寄存器的设置 void putc ( char ch) //发送字符
{ while (!(rUTRSTAT0 & 0X2)); //判断发送缓冲区是否为空
rUTXH0 = ch; //发送
} char getc ( void ) //接收字符
{ while (!(rUTRSTAT0 & 0X1)); //判断接收缓冲区是否为空
return rURXH0; //接收
} void putstr( char *str) //发送字符串
{ while (*str != '\0' )
{
if (*str == '\n' )
{
putc ( '\n' );
putc ( '\r' );
}
else
putc (*str);
str++;
}
} void wait( long long max) //延迟函数
{ for (; max > 0; max--)
;
} void itoa(unsigned long value) //进行字符转换
{ unsigned long temp;
int i, flag = 0;
char data[4];
for (i = 0; i < 4; i++) //清空数组
data[i] = '\0' ;
for (i = 0; i < 3; i++)
{
temp = (value >> 4 * i) & 0xf;
if (temp < 10)
data[2 - i] = '0' + temp;
else
{
if (temp <= 0xf)
data[2 - i] = 'a' + temp - 10;
}
}
putstr( " Value of AIN0 is 0x" );
putstr(data);
putstr( "\r" );
putstr( "\n" );
} int main( void )
{ rGPHCON = rGPHCON & ~(0xf << 4) | (0xa << 4); //配置RDX0与TDX0
rGPHUP = 0X0c; //设置上拉电阻
rUFCON0 = 0; //不用FIFO</span></span>
rUMCON0 = 0; //不用流控</span></span>
rULCON0 = 0X3; //8位数据,1个停止位,无校验,正常模式
rUCON0 = 0X5; //时钟源位PCLK,中断方式为查询
rUBRDIV0 = (( int )(50000000 / 115200 / 16) - 1); //设置波特率为115200
rADCCON = 0x4c41; //初始化ADC
putstr( "\nThis is ADC test:\n" );
unsigned long temp = 0;
while (1)
{
while ((rADCCON & (1 << 15)) == 0); //判断是否转换结束
temp = rADCDAT0; //读取转换值
itoa(temp);
rADCCON = 0x4c41; //再启动ADC
wait(200000);
}
return 0;
} |
//start.S
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.text .global _start _start: #define WATCHDOG 0x53000000 ldr r0, =WATCHDOG
mov r1, #0
str r1, [r0]
ldr sp, =1024*4
bl main
loop: b loop
|
//Makefile
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adc.bin: start.S adc.c arm-linux-gcc -c start.S -o start.o
arm-linux-gcc -c adc.c -o adc.o
arm-linux-ld -Ttext 0x30008000 start.o adc.o -o adc
arm-linux-objcopy -O binary -S adc adc.bin
clean: rm -f *.o adc.bin
|
编译链接
OK,成功!
本文转自infohacker 51CTO博客,原文链接:http://blog.51cto.com/liucw/1224923