AT45DB161用MSP430F149普通I/O口模拟SPI读写数据状态寄存器读数总是0x00
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#include <msp430x14x.h>
unsigned char Flash_Data[512]; unsigned char Flash_Data1[512]; void AT45DB161_cs_low(void); void AT45DB161_cs_high(void); void AT45DB161_si_low(void); void AT45DB161_si_high(void); void AT45DB161_sck_low(void); void AT45DB161_sck_high(void); unsigned char AT45DB161_so(void); void write_AT45DB161_byte(unsigned char data); unsigned char read_AT45DB161_byte(void); //===============================================================================
//================================================================================ void init_AT45DB161(void); //=============================================================================== // //P64 SO IN //P65 CS OUT 低有效 //P66 SCK OUT //P67 SI OUT void init_AT45DB161(void) { P6OUT|=0xe0; //1110 0000 CS SCK SI输出1 } //片选有效 void AT45DB161_cs_low(void) { P6OUT&=0xdf; //1101 1111 CS=0 P65 CS } //片选无效 void AT45DB161_cs_high(void) { P6OUT|=0x20; //0010 0000 CS=1 P65 CS } //SI置低 void AT45DB161_si_low(void) { P6OUT&=0x7f; //0111 1111 SI=0 P67 SI } //SI置高 void AT45DB161_si_high(void) { P6OUT|=0x80; //1000 0000 SI=1 P67 SI } //SCK置低 void AT45DB161_sck_low(void) { P6OUT&=0xbf; //1011 1111 SCK=0 P66 SCK } //SCK置高 void AT45DB161_sck_high(void) { P6OUT|=0x40; //0100 0000 SCK=1 P66 SCK }
void delay_AT5DB161(unsigned char time) { while(time--); }
//读SO状态 unsigned char AT45DB161_so(void) { unsigned char c; c=P6IN; c=c&0x10; if(c==1) { c=1; } else { c=0; } return(c); } //写1个字节 void write_AT45DB161_byte(unsigned char data)//－－－－－－－－－－－－－－－－－－－－－－－－－ { unsigned int i; AT45DB161_cs_low(); AT45DB161_sck_low(); for(i=0;i<8;i++) { if(data&0x80) AT45DB161_si_high(); else AT45DB161_si_low(); delay_AT5DB161(20); AT45DB161_sck_low(); delay_AT5DB161(20); AT45DB161_sck_high(); data<<=1; } AT45DB161_cs_high(); } //读1个字节 unsigned char read_AT45DB161_byte(void)//－－－－－－－－－－－－－－－－－－－－－－－－－ { unsigned int i; unsigned char data,c; AT45DB161_cs_low(); data=0; for(i=0;i<8;i++) { AT45DB161_sck_high(); delay_AT5DB161(20); AT45DB161_sck_low(); delay_AT5DB161(20); c=AT45DB161_so(); if(c) { data|=0x80>>i; } else { data>>=1; } } AT45DB161_cs_high(); return(data); }
//Read register status unsigned char AT45DB161_ReadStatus(void) { unsigned char status; AT45DB161_cs_low(); write_AT45DB161_byte(0xd7); write_AT45DB161_byte(0x00); write_AT45DB161_byte(0x00); write_AT45DB161_byte(0x00); status=read_AT45DB161_byte(); AT45DB161_cs_high(); return(status); }
//Read from AT45DB161 to MSP430 ----Main Memory Page Read(52H+24bits addr+32bits dc) void AT45DB161_MainMemoryPageRead(unsigned int pageaddr,unsigned int baseaddr,unsigned int len,unsigned char *pbuf) { unsigned int i; while(!(AT45DB161_ReadStatus()&0x80)); AT45DB161_cs_low(); write_AT45DB161_byte(0x52); write_AT45DB161_byte((unsigned char)(pageaddr>>6)); write_AT45DB161_byte((unsigned char)((pageaddr<<2)|(baseaddr>>8))); write_AT45DB161_byte((unsigned char)(baseaddr)); for(i=0;i<4;i++) write_AT45DB161_byte(0x00); for(i=0;i<len;i++) pbuf=read_AT45DB161_byte(); AT45DB161_cs_high(); }
//Write from MSP430 to buffer-----Buffer1/2 Write(84H/87H+14bits dc+10bits addr) void AT45DB161_BufferWrite(unsigned char nbuf,unsigned int baseaddr,unsigned int len,unsigned char *pbuf) { unsigned int i; while(!(AT45DB161_ReadStatus()&0x80)); AT45DB161_cs_low(); switch(nbuf) { case 1: write_AT45DB161_byte(0x84); break; case 2: write_AT45DB161_byte(0x87); break; } write_AT45DB161_byte(0x00); write_AT45DB161_byte((unsigned char)(baseaddr>>8)); write_AT45DB161_byte((unsigned char)baseaddr); for(i=0;i<len;i++) write_AT45DB161_byte(pbuf); AT45DB161_cs_high(); }
//Write from MSP430 to AT45DB161 through Buffer------Main Memory Page Program Through Buuffer1/2 //--------------------------------------------------- void AT45DB161_MainMemoryPageProgramThroughBuuffer(unsigned char nbuf,unsigned int pageaddr,unsigned int baseaddr,unsigned int len,unsigned char *pbuf) { while(!(AT45DB161_ReadStatus()&0x80)); AT45DB161_cs_low(); switch(nbuf) { case 1: write_AT45DB161_byte(0x82); break; case 2: write_AT45DB161_byte(0x85); break; } write_AT45DB161_byte((unsigned char)(pageaddr>>6)); write_AT45DB161_byte((unsigned char)((pageaddr<<2)|(baseaddr>>8))); write_AT45DB161_byte((unsigned char)(baseaddr)); AT45DB161_cs_high(); }
/* 初始化P6口 */ void Iint_Port6(void) { P6SEL=0x00; //0000 0011 P6口的低两位，设置为ADC12功能 P6DIR=0xe0; //1110 0000 } void Iint_OSCF(void) { int i; BCSCTL1=0x04; //ACLK来源于LFXT1低频模式，其频率为32K，XT2开启 BCSCTL2=0x88; //MCLK与SMCLK均来源于XT2,分频系数为1，频率为8M do { IFG1 &= ~OFIFG; // Clear OSCFault flag for (i = 0xFF; i > 0; i--); // Time for flag to set } while ((IFG1 & OFIFG) != 0); // OSCFault flag still set }
void main(void) { unsigned int i; //unsigned char Flash_Data[512]; WDTCTL=WDTPW+WDTHOLD; Iint_OSCF(); Iint_Port6(); init_AT45DB161(); for(i=0;i<512;i++) Flash_Data=i; AT45DB161_MainMemoryPageProgramThroughBuuffer(1,100,0,512,Flash_Data); //buffer 1,page 100,addr 0,length 512 for(i=0;i<512;i++) //清空Flash_Data Flash_Data=0; AT45DB161_MainMemoryPageRead(100,0,512,Flash_Data); //page 100,addr 0,length 512 while(1); }
以上是程序，已经测试很久了。。。不知道问题出在哪里了？是不是I/O口模拟SPI时序除了问题？麻烦对这方面了解的版友帮帮忙吧。。。小女子跪谢了~~~在线等待
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