原创 W25Q16BV driver sample(II)

// read Manufacturer /device id, return must be 0xef/0x14 is for winbond/W25Q16BV
void w25q16_mdid_cmd(void)
{
        U8 data1, data2;
       
        w25q16_busy_delay();
   
        IO0CLR = SPI0CS;
        spi0_send_U8(MDID_INST);
        spi0_send_U8(0x00);                             // dummy
        spi0_send_U8(0x00);                             // dummy
        spi0_send_U8(0x00);                            
        data1 = spi0_read_U8();
        data2 = spi0_read_U8();       
        IO0SET = SPI0CS; 
       
        // show read data for debug
        uart0_putchar(0xff);
        uart0_putchar(data1);
        uart0_putchar(data2);       
        uart0_putchar(0xff);
}

// read Manufacturer/Memory Type/Capacity, return must be 0xef/0x40/0x15 is for winbond/W25Q16BV
void w25q16_jeid_cmd(void)
{
        U8 data1, data2, data3;
       
        w25q16_busy_delay();
   
        IO0CLR = SPI0CS;
        spi0_send_U8(JEID_INST);
        data1 = spi0_read_U8();
        data2 = spi0_read_U8();
        data3 = spi0_read_U8();       
        IO0SET = SPI0CS; 
       
        // show read data for debug
        uart0_putchar(0xff);
        uart0_putchar(data1);
        uart0_putchar(data2);       
        uart0_putchar(data3);               
        uart0_putchar(0xff);
}

// Write enable
void w25q16_wren_cmd(void)
{
        w25q16_busy_delay();
   
        IO0CLR = SPI0CS;
        spi0_send_U8(WREN_INST);
        IO0SET = SPI0CS;       
}

// fast read
void w25q16_read(U8* buf, U32 buf_len, U32 address)
{
        w25q16_busy_delay();   
   
        IO0CLR = SPI0CS;
        spi0_send_U8(FTRD_INST);                       
        spi0_send_U8((U8)(address>>16));
        spi0_send_U8((U8)(address>>8));
        spi0_send_U8((U8)(address));
        spi0_send_U8(0x00);                             // dummy       
      for(U32 i=0; i     buf = spi0_read_U8();
        }  
        IO0SET = SPI0CS;
}