数字化语音存储与回放系统的设计

NSSMD0=1; NSSMD0=0; SPI0DAT=0xC7; while(SPIF!=1); SPIF=0; NSSMD0=1; NSSMD0=0; SPI0DAT=0x05; while(SPIF!=1); SPIF=0;

while(men_status==0x01) {

SPI0DAT=0xFF; while(SPIF!=1); SPIF=0;

men_status=SPI0DAT&0x01; }

NSSMD0=1; }

/********************************************* M25P16写一字节

/**********************************************/ void WR_flash(ulong addr,uchar data_byte) {

ADDRESS temp_addr;

temp_addr.addrlong=addr; NSSMD0=0; SPI0DAT=0x06; while(SPIF!=1); SPIF=0; NSSMD0=1; NSSMD0=0; SPI0DAT=0x02; while(SPIF!=1); SPIF=0;

SPI0DAT=temp_addr.addrbyte[1]; while(SPIF!=1); SPIF=0;

SPI0DAT=temp_addr.addrbyte[2]; while(SPIF!=1); SPIF=0;

SPI0DAT=temp_addr.addrbyte[3]; while(SPIF!=1); SPIF=0;

SPI0DAT=data_byte; while(SPIF!=1); SPIF=0; NSSMD0=1; }

/********************************************* M25P16读一字节

/**********************************************/ uchar Read_flash(ulong addr) {

ADDRESS temp_addr;

temp_addr.addrlong=addr; NSSMD0=0; SPI0DAT=0x06; while(SPIF!=1); SPIF=0; NSSMD0=1; NSSMD0=0; SPI0DAT=0x03; while(SPIF!=1); SPIF=0;

SPI0DAT=temp_addr.addrbyte[1]; while(SPIF!=1); SPIF=0;

SPI0DAT=temp_addr.addrbyte[2]; while(SPIF!=1); SPIF=0;

SPI0DAT=temp_addr.addrbyte[3]; while(SPIF!=1); SPIF=0;

SPI0DAT=0xFF; while(SPIF!=1); SPIF=0; NSSMD0=1;

return SPI0DAT; }