单片机通过SPI外扩FLASH程序代码

uint32 SPIInit( void ) { S0SPCR = 0x00; PINSEL0 &= 0xFFFF00FF; PINSEL0 |= 0x00001500; //引脚定义．．． IOSET = AT45DB_CS; /* Setting SPI0 clock, for Atmel SEEPROM, SPI clock should be no more than 3Mhz on 4.5V~5.5V, no more than 2.1Mhz on 2.7V~5.5V */ S0SPCCR = 0x8; //速度．．． //#if INTERRUPT_MODE // if ( install_irq( SPI0_INT, (void *)SPI0Handler ) == FALSE ) // { // return (FALSE); // } /* 8 bit, CPOL=CPHA=0, master mode, MSB first, interrupt enabled */ // S0SPCR = SPI0_SPIE | SPI0_MSTR; //#else S0SPCR = SPI0_MSTR; //用查询方式 ．．． //#endif return( TRUE ); } //************************************************************************************************************* //－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－ //---------------Buffer1_To_Write_AT45 (uint16 u16_page);．．．．－－－u16_page为主存的页地址．－－－－－－ //---------------SPI，转缓存1写入主存页中--------------- //－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－ //************************************************************************************************************* void Buffer1_To_Write_AT45 (uint16 u16_page) { uint8 i; IOSET=WP; IOSET = AT45DB_CS; while(!(IOPIN&Rdy_busy)); for(i=0;i<10;i++); IOCLR = AT45DB_CS; for(i=0;i<10;i++); S0SPDR = 0x83; while(0 == (S0SPSR&0x80)); S0SPDR = (uint8)(u16_page>>5); while(0 == (S0SPSR&0x80)); S0SPDR = ( (uint8)(u16_page))<<3; while(0 == (S0SPSR&0x80)); S0SPDR = 0x00; while(0 == (S0SPSR&0x80)); IOSET = AT45DB_CS; for(i=0;i<10;i++); while(!(IOPIN&Rdy_busy)); IOCLR=WP; } //************************************************************************************************************* //－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－ //---Write_Buffer1_AT45();．－－－u16_address为缓存1的起始地址，u16_Counter为要写入的字节数．store_data写入数据的起始字节地址．．．． //---------------SPI，写缓存1--------------- //－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－ //************************************************************************************************************* void Write_Buffer1_AT45 (uint16 u16_address,uint16 u16_Counter,uint8 *store_data) { uint16 u16_cnt; uint8 i; IOSET = AT45DB_CS; for(i=0;i<10;i++); IOCLR = AT45DB_CS; for(i=0;i<10;i++); S0SPDR = 0x84; while(0 == (S0SPSR&0x80)); S0SPDR = 0x00; while(0 == (S0SPSR&0x80)); S0SPDR = (uint8)(u16_address>>8); while(0 == (S0SPSR&0x80)); S0SPDR = (uint8)(u16_address); while(0 == (S0SPSR&0x80)); for(u16_cnt=0;u16_cnt<u16_Counter;u16_cnt++) { S0SPDR = *(store_data+u16_cnt); while(0 == (S0SPSR&0x80)); } IOSET = AT45DB_CS; IOSET = AT45DB_CS; while(!(IOPIN&Rdy_busy)); } //************************************************************************************************************* //－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－ //---Main_to_Buffer1_AT45();．－－－u16_page为主存的页地址．．．． //---------------SPI，主存页的内容转到缓存1中--------------- //－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－ //************************************************************************************************************* void Main_to_Buffer1_AT45(uint16 u16_page) { uint8 i; IOSET = AT45DB_CS; while(!(IOPIN&Rdy_busy)); for(i=0;i<10;i++); IOCLR = AT45DB_CS; for(i=0;i<10;i++); S0SPDR = 0x53; while(0 == (S0SPSR&0x80)); S0SPDR = (uint8)(u16_page>>5); while(0 == (S0SPSR&0x80)); S0SPDR = ( (uint8)(u16_page))<<3; while(0 == (S0SPSR&0x80)); S0SPDR = 0x00; while(0 == (S0SPSR&0x80)); IOSET = AT45DB_CS; IOSET = AT45DB_CS; while(!(IOPIN&Rdy_busy)); } //------------------------------------------------------ //--------------------------------------- //************************************************************************************************************* //－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－ //---Reda_AT45_Continue();．－－－u16_page为主存的页地址．u16_address要读的数据的起始地址．u16_cnt要读的字节数．Store_temp存放数据的起始位置． //---------------SPI，直接读主存的任意地址数据．．---------------Reda_AT45_Continue　MUST BE ＇Read_AT45_Continu＇haha．．．． //－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－ //************************************************************************************************************* //****************************************************************************/ uint8 SpiSendData(uint8 data) { // OS_ENTER_CRITICAL(); S0SPDR = data ; while(0 == (S0SPSR & 0x80)); // 等待SPIF置位，即等待数据发送完毕 return(S0SPDR); // OS_EXIT_CRITICAL(); } //--------------------------------------- //************************************************************************************************************* //－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－ //---Reda_AT45_Continue();．－－－u16_page为主存的页地址．u16_address要读的数据的起始地址．u16_cnt要读的字节数．Store_temp存放数据的起始位置． //---------------SPI，直接读主存的任意地址数据．．---------------Reda_AT45_Continue　MUST BE ＇Read_AT45_Continu＇haha．．．． //－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－ //************************************************************************************************************* void Reda_AT45_Continue(uint16 u16_page,uint16 u16_address,uint16 u16_cnt,uint8 *Store_temp) { uint16 i; IOSET = AT45DB_CS; while(!(IOPIN&Rdy_busy)); for(i=0;i<9;i++); IOCLR = AT45DB_CS; for(i=0;i<9;i++); /* S0SPDR = 0xe8; while(0 == (S0SPSR&0x80)); S0SPDR = (uint8)(u16_page>>5); while(0 == (S0SPSR&0x80)); S0SPDR = (( (uint8)(u16_page))<<3)|( (uint8)(u16_address>>8)); while(0 == (S0SPSR&0x80)); S0SPDR = (uint8)(u16_address); while(0 == (S0SPSR&0x80)); S0SPDR = 0x00; while(0 == (S0SPSR&0x80));; S0SPDR = 0x00; while(0 == (S0SPSR&0x80)); S0SPDR = 0x00; while(0 == (S0SPSR&0x80)); S0SPDR = 0x00; while(0 == (S0SPSR&0x80)); */ SpiSendData(0xe8); SpiSendData((uint8)(u16_page>>5)); SpiSendData((( (uint8)(u16_page))<<3)|( (uint8)(u16_address>>8))); SpiSendData((uint8)(u16_address)); SpiSendData(0x00); SpiSendData(0x00); SpiSendData(0x00); SpiSendData(0x00); for(i=0;i<u16_cnt;i++) { S0SPDR = 0xFF; while(0 == (S0SPSR&0x80)); *(Store_temp+i) = S0SPDR; } IOSET = AT45DB_CS; } //************************************************************************************************************* //－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－ //---------------Buffer２_To_Write_AT45 (uint16 u16_page);．．．．－－－u16_page为主存的页地址．－－－－－－ //---------------SPI，转缓存2写入主存页中--------------- //－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－ //************************************************************************************************************* void Buffer2_To_Write_AT45 (uint16 u16_page) { uint8 i; IOSET=WP; IOSET = AT45DB_CS; while(!(IOPIN&Rdy_busy)); for(i=0;i<10;i++); IOCLR = AT45DB_CS; for(i=0;i<10;i++); S0SPDR = 0x86; while(0 == (S0SPSR&0x80)); S0SPDR = (uint8)(u16_page>>5); while(0 == (S0SPSR&0x80));