角度傳感器的程序(共3頁)

1、精選優(yōu)質(zhì)文檔-傾情為你奉上/*文件名：傾角.c描述：通過SPI檢測得到X和Y角度的數(shù)字量的值，比較數(shù)字量的值，大概在-40到+40內(nèi)就可以基本平衡。版本：1.02011-7-4*/#include<msp430x14x.h>#include"angle.h"#define SETB(BIT) P1OUT|=BIT#define CLRB(BIT) P1OUT&=BITunsigned int SPI_ReadBits( unsigned char n );void SPI_WriteByte( unsigned char wdata );void SPI

2、_Start(void);void SPI_Stop(void);void SPI_Delay(unsigned int);signed int SPI_GetX( void );signed int SPI_GetY( void );void SPI_Init() P1DIR|=(CSB+MOSI+SCK); P1DIR&=MISO;void SPI_Stop( void ) CLRB(SCK); SETB(CSB); / SPI_Delay(100);void SPI_Delay(unsigned int n) while(n-);void SPI_Start(void) CLRB

3、(SCK); CLRB(CSB);/ SPI_Delay(100);/主機(jī)寫一個(gè)BYTE到器件/最終狀態(tài):CLK=LOWvoid SPI_WriteByte( unsigned char wdata ) unsigned char i; for( i = 0 ; i < 8 ; +i ) CLRB(SCK); SPI_Delay(10); if(wdata & 0x80)!=0)SETB(MOSI); else CLRB(MOSI); wdata = wdata << 1; SPI_Delay(10); SETB(SCK); SPI_Delay(10); /主機(jī)讀入N

4、個(gè)比特/n 限制為16及其以下/結(jié)束狀態(tài)CLK=0unsigned int SPI_ReadBits( unsigned char n ) unsigned int rtemp=0,i; for( i = 0 ; i < n ; +i ) rtemp <<= 1; SETB(SCK); SPI_Delay(10); CLRB(SCK); SPI_Delay(10); if(P1IN&MISO)!=0) rtemp |= 0x0001; else rtemp &= 0xFFFE; return rtemp;signed int SPI_GetX( void ) unsigned int result; SPI_Start(); SPI_WriteByte( RDAX );/ SPI_Delay(10000); />150US result = SPI_ReadBits(11); SPI_Stop(); return (result);/-1024signed int SPI_GetY( void ) unsigned int result; SPI_Start(); SPI_WriteByte( RDAY );/ SPI_Delay(10000); />