8051擷取HM55B訊號的問題
各位前輩們好：可以幫我看一下程式哪裡錯誤了，這個程式是要擷取電子羅盤HM55B的XY軸磁場強度的程式，我用的單晶片是8051，編譯軟體是KEIL C，目前問題是出在8051接收不到由HM55B所發出來的狀態旗標訊號%1100，不知道是8051的指令沒送進HM55B的Din還是我的CLK設錯了，我用了好久都沒用出一個結果，請各位前輩幫個忙，另外位了簡化程式，我把擷取ＸＹ軸磁場強度和角度計算的程式以P1 port的輸出代替，希望各位前輩能幫幫忙，感激不盡。
#include"reg51.h"
#include"math.h"
#include"stdio.h"
sbit out=0x90; /*out is P1_0*/
sbit in=0x91; /*in is P1_1*/
sbit clock=0x92; /*clock is P1_2*/
sbit enable=0x93; /*enable is P1_3*/
int RESET=0x0000; /*RESET = 00000000B*/
int MEASURE=0x0008; /*MEASURE = 00001000B*/
int REPORT=0x000c; /*REPORT = 00001100B*/
int bdata READY=0x000c; /*READY = 00001100B*/
int bdata MOVE_OUT,MOVE_IN; /*MOVE_OUT is command move to HM55B Din
MOVE_IN is status move to 8051
MOVE_INXY is data move to 8051*/
int x_data,y_data;
int MASK=0xf800;
sbit M_OUT=MOVE_OUT^8;
sbit M_IN=MOVE_IN^8;
sbit M_INXY=MOVE_INXY^8;
void shift_out(int);
int shift_in();
int shift_inXY();
void delay(int);
main()
{
again_me:
clock=0;
shift_out(RESET); /* move reset command to HM55B*/
enable=1;
shift_out(MEASURE); /* move measure command to HM55B*/
enable=1;
delay(40000); /* stay 40ms*/
shift_out(REPORT); /* move report command to HM55B*/
enable=1;
shift_in(); /* data move to 8051*/
if(MOVE_IN==READY) /* if the data of move to 8051 is arighy */
{
P1=0x23; /* P1 output*/
}
else
{
goto again_me;
}
}
void shift_out (int command) /* 8051 move command to HM55B*/
{
int i;
enable=1;
enable=0;
for(i=0;i<4;i++)
{
MOVE_OUT=command;
clock=1;
out=M_OUT;
clock=0;
command>>=1;
}
}
int shift_in () /* HM55B move status to 8051*/
{
int i;
for(i=0;i<4;i++)
{
clock=1;
M_IN=in;
clock=0;
if(i<3)
{
MOVE_IN<<=1;
}
}
enable=1;
return (MOVE_IN);
}
void delay(int num) /* delay function*/
{
int i;
for(i=0;i<num;i++)
;
}
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