Revision 0:b71060e03299, committed 2016-10-09

Comitter:

DimiterK

Date:

Sun Oct 09 23:05:55 2016 +0000

Commit message:

First release

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/W25Q64FV.cpp	Sun Oct 09 23:05:55 2016 +0000
@@ -0,0 +1,283 @@
+#include "W25Q64FV.h"
+
+W25Q64FV::W25Q64FV(PinName mosi, PinName miso, PinName sclk, PinName cs, int frequency)
+{
+
+    this->cs = new DigitalOut(cs);    
+    this->cs->write(true);
+    this->frequency = frequency;
+
+    spi = new SPI(mosi, miso, sclk);    
+    spi->format(8, 0);
+    spi->frequency(frequency);
+}
+
+W25Q64FV::~W25Q64FV()
+{
+    delete spi;
+    delete cs;
+}
+
+uint16_t W25Q64FV::Id()
+{
+    cs->write(0);
+    spi->write(CMD_MANU_ID);
+    spi->write(0);
+    spi->write(0);
+    spi->write(0);
+    unsigned id = (spi->write(0) << 8) | spi->write(0);
+    cs->write(1);
+    return id;
+}
+
+uint32_t W25Q64FV::JEDECId()
+{
+    cs->write(0);
+    spi->write(CMD_JEDEC_ID);
+    unsigned id = (spi->write(0) << 16) | (spi->write(0) << 8) | spi->write(0);
+    cs->write(1);
+    return id;
+}
+
+void W25Q64FV::writeEnable(void)
+{
+    cs->write(0);
+    spi->write(CMD_WREN);
+    cs->write(1);
+}
+ 
+void W25Q64FV::writeDisable(void)
+{
+    cs->write(0);
+    spi->write(CMD_WR_DISABLE) ;
+    cs->write(1);
+}   
+
+uint8_t W25Q64FV::readStatus(void)
+{   
+    uint8_t data ;
+    cs->write(0);
+    spi->write(CMD_RDSR1) ;
+    data = spi->write(DUMMY) ;                     // dummy
+    cs->write(1);
+    return( data ) ;
+}
+
+void W25Q64FV::writeStatusReg(int addr)            // Write SR cmd 01h + 3B data
+{   
+    cs->write(0);
+    spi->write(CMD_WRSR1) ;                         // Write SR cmd 01h
+    spi->write((addr >> 16)&0xFF) ;                // address
+    spi->write((addr >>  8)&0xFF) ;
+    spi->write(addr & 0xFF) ;
+    cs->write(1);
+}
+
+void W25Q64FV::writeSecurityReg(int addr)          // WRSCUR cmd 2Fh + 1B data
+{   
+    cs->write(0);
+   // spi->write(CMD_WRSCUR) ;                         // Write SR cmd 01h
+    spi->write(addr & 0xFF) ;
+    cs->write(1);
+}
+
+
+uint8_t W25Q64FV::readByte(int addr)                  // Single Byte Read
+{
+    uint8_t data ;    
+    cs->write(0);
+    spi->write(CMD_READ_DATA) ;                         // send 03h
+    spi->write((addr >> 16)&0xFF) ;
+    spi->write((addr >>  8)&0xFF) ;
+    spi->write(addr & 0xFF) ;
+    data = spi->write(DUMMY) ;                     // write data is dummy 
+    cs->write(1);
+    return( data ) ;                                // return 1 byte 
+}
+ 
+bool W25Q64FV::read(uint32_t addr, uint8_t* dst, uint32_t len)
+{
+    cs->write(0);
+    spi->write(0x03);
+    spi->write((addr >> 16) & 0xff);
+    spi->write((addr >> 8) & 0xff);
+    spi->write(addr & 0xff);
+    for (uint32_t i=0; i<len; ++i)
+        dst[i] = spi->write(0);
+    cs->write(1);
+    
+    return true;
+}
+
+void W25Q64FV::hsread(uint32_t addr, uint8_t* dst, uint32_t len, int frequency)
+{
+    int save_frequency = this->frequency;
+    spi->frequency(frequency);
+    cs->write(0);
+    spi->write(0x0B);
+    spi->write((addr >> 16) & 0xff);
+    spi->write((addr >> 8) & 0xff);
+    spi->write(addr & 0xff);
+    spi->write(0); // dummy
+    for (uint32_t i=0; i<len; ++i)
+        dst[i] = spi->write(0);
+    cs->write(1);
+    spi->frequency(save_frequency);
+}
+
+uint8_t W25Q64FV::readSFDP(int addr)               // Read SFDP
+{
+    uint8_t data ;    
+    cs->write(0);
+    spi->write(CMD_READ_SFDP) ;                       // send cmd 5Ah
+    spi->write((addr >> 16)&0xFF) ;                // address[23:16]
+    spi->write((addr >>  8)&0xFF) ;                // address[15:8]
+    spi->write(addr & 0xFF) ;                      // address[7:0]
+    spi->write(DUMMY) ;                            // dummy cycle
+    data = spi->write(DUMMY) ;                     // return 1 byte 
+    cs->write(1);
+    return( data ) ;
+}
+
+uint8_t W25Q64FV::wait_while_busy(void)
+{
+    uint8_t temp = 0;
+    cs->write(0);           //Enable device
+    spi->write(CMD_RDSR1);   //Send RDSR command
+    temp = spi->write(DUMMY);
+    cs->write(1);          //Disable
+    if (temp & 0x01) return 1;
+    else return 0;
+}
+
+
+bool W25Q64FV::page_program(uint32_t addr, uint8_t* write_buffer, uint8_t len)
+{
+    // no point in writing FF as an empty sector already has those
+    // (and if not empty, write won't succeed)
+    bool skipped = false;
+    while (len > 0 && *write_buffer == 0xFF)
+    {
+        ++write_buffer;
+        --len;
+        ++addr;
+        skipped = true;
+    }
+    if (len == 0 && skipped)
+        return true; // special case when succeeds when nothing to do
+
+    if (len < 1 || len > 256)
+        return false;
+        
+    // write enable
+    writeEnable();
+
+    cs->write(0);
+    spi->write(0x02);
+    spi->write((uint8_t)(addr >> 16));
+    spi->write((uint8_t)(addr >> 8));
+    spi->write((uint8_t)addr);
+    for (uint16_t i=0; i<len; ++i)
+        spi->write(write_buffer[i]);
+    cs->write(1);
+    wait_while_busy();
+    
+    return true;
+}
+
+void W25Q64FV::sector_erase_4k(uint32_t addr)
+{
+    cs->write(0);
+    spi->write(CMD_ERASE_SECTOR);
+    spi->write((uint8_t)(addr >> 16));
+    spi->write((uint8_t)(addr >> 8));
+    spi->write((uint8_t)addr);
+    cs->write(1);
+    wait_while_busy();
+}
+
+void W25Q64FV::block_erase_32k(uint32_t addr)
+{
+    cs->write(0);
+    spi->write(CMD_ERASE_BLOCK32);
+    spi->write((uint8_t)(addr >> 16));
+    spi->write((uint8_t)(addr >> 8));
+    spi->write((uint8_t)addr);
+    cs->write(1);
+    wait_while_busy();
+}    
+
+void W25Q64FV::block_erase_64k(uint32_t addr)
+{
+    cs->write(0);
+    spi->write(CMD_ERASE_BLOCK64);
+    spi->write((uint8_t)(addr >> 16));
+    spi->write((uint8_t)(addr >> 8));
+    spi->write((uint8_t)addr);
+    cs->write(1);
+    wait_while_busy();
+}    
+
+void W25Q64FV::chip_erase()
+{
+    cs->write(0);
+    spi->write(CMD_ERASE_CHIP);
+    cs->write(1);
+    wait_while_busy();
+}
+
+
+
+
+
+
+void W25Q64FV::writeArray(uint32_t address, uint8_t* pData, uint32_t arrayLength)
+{
+    unsigned int i = 0;
+    cs->write(0);                        //Enable device
+    spi->write(CMD_WREN);                //Send WREN command
+    cs->write(1);                      //Disable device
+
+    cs->write(0);                        //Enable device
+    spi->write(CMD_PAGEPROG);            //Send Byte Program command
+    spi->write((uint8_t)(address >> 16) & 0xFF);
+    spi->write((uint8_t)(address >>  8) & 0xFF);
+    spi->write(0x00);
+
+    for (i=0;i<arrayLength;i++)
+    {
+        spi->write(pData[i]);            //Send byte to be programmed 
+    }
+    cs->write(1);              //Disable device
+ 
+    //Wait Busy
+    while ((readStatus() & 0x01) == 0x01) //Waste time until not busy
+    {
+    }
+}
+
+
+void W25Q64FV::readArray(uint32_t address, uint8_t* pData, uint32_t arrayLength)
+{
+    unsigned int i = 0;
+
+    cs->write(0);                                    //Enable device
+    spi->write(CMD_READ_DATA);                       //Read command
+    spi->write((uint8_t)(address >> 16));
+    spi->write((uint8_t)(address >>  8));
+    spi->write((uint8_t) address);
+
+    for (i = 0; i <arrayLength; i++)                //Read until no_bytes is reached
+    {
+        pData[i] = spi->write(DUMMY);                      //Receive bytes
+    }
+    cs->write(1);                                  //Disable device
+
+    //Wait Busy
+    while (readStatus() & 0x01)      //Waste time until not busy
+    {
+    }
+}
+
+
+

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/W25Q64FV.h	Sun Oct 09 23:05:55 2016 +0000
@@ -0,0 +1,102 @@
+#include <mbed.h>
+#include <stdint.h>
+
+#define CMD_WREN                0x06
+#define CMD_WR_DISABLE          0x04
+#define CMD_RDSR1               0x05
+#define CMD_RDSR2               0x35
+#define CMD_WRSR1               0x01  //write status register
+#define CMD_PAGEPROG            0x02
+
+#define CMD_ERASE_SECTOR        0x20
+#define CMD_ERASE_BLOCK32       0x52
+#define CMD_ERASE_BLOCK64       0xD8
+#define CMD_ERASE_CHIP          0x60
+
+#define CMD_PROG_SUSPEND        0x75
+#define CMD_PROG_RESUME         0x7A
+#define CMD_PWR_DOWN            0xB9
+
+#define CMD_READ_DATA           0x03
+#define CMD_READ_HS             0x0B
+
+#define CMD_MANU_ID             0x90        
+#define CMD_JEDEC_ID            0x9F        // Read Manufacturer and JDEC Device ID 
+#define CMD_UNIQUE_ID           0x4B
+
+#define CMD_READ_SFDP           0x5A
+#define CMD_ERASE_SEC_REG       0x44
+#define CMD_PROG_SEC_REG        0x42
+#define CMD_READ_SEC_REG        0x48
+#define CMD_ENABLE_RES          0x66
+#define CMD_RESET               0x99
+
+#define DUMMY                   0x00 // Dummy byte which can be changed to any value
+
+
+class W25Q64FV
+{
+public:
+
+    static const int SID_LEN = 32;
+    static const int SECTOR_LEN = 4096;
+    static const int PAGE_LEN = 256;
+    static const int MAX_ADDR = 0x7FFFFF;
+
+private:
+
+    SPI* spi;
+    DigitalOut* cs;
+
+    int frequency; 
+    static uint8_t sector_buffer[SECTOR_LEN];
+
+
+public:
+    W25Q64FV(PinName mosi, PinName miso, PinName sclk, PinName cs, int frequency=10000000);
+    ~W25Q64FV();
+    
+    uint16_t Id();
+    uint32_t JEDECId();
+
+    // Read Status Register    
+    // bit 0 BUSY 1=Write in progress
+    // bit 1 WEL  1=Write Enabled
+    // bit 2 BP0  block write protection
+    // bit 3 BP1  block write protection
+    // bit 4 BP2  block write protection
+    // bit 5 BP3  block write protection
+    // bit 6 SEC  1=Security ID space locked
+    // bit 7 BPL  1=BP0..BP3 are read-only, 0=r/w
+    uint8_t readStatus();
+    void    writeStatusReg(int addr); // Write Status Register
+    
+    void    writeEnable();            // Write Enable
+    void    writeDisable();           // Write Disable
+    
+    void    writeSecurityReg(int addr);
+
+    uint8_t wait_while_busy(void);
+
+    uint8_t readByte(int32_t addr);
+    bool    read(uint32_t addr, uint8_t* dst, uint32_t len);
+    
+    void    hsread(uint32_t addr, uint8_t* dst, uint32_t len, int frequency);
+
+
+    uint8_t readSFDP(int addr);
+
+    void    sector_erase_4k(uint32_t addr);
+    void    block_erase_32k(uint32_t addr);
+    void    block_erase_64k(uint32_t addr);
+    void    chip_erase();
+
+    bool    page_program(uint32_t addr, uint8_t* write_buffer, uint8_t len);
+
+    bool    write(int32_t addr, uint8_t* write_buffer, int32_t len);
+    
+    void    writeArray(uint32_t address, uint8_t* pData, uint32_t arrayLength);
+    void    readArray(uint32_t address, uint8_t* pData, uint32_t arrayLength);
+
+    
+};
\ No newline at end of file