Diff: S25FL256S.cpp

Revision:

4:8c463abb67d5

Child:

6:ef894010def4

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/S25FL256S.cpp	Sat May 19 09:56:14 2018 +0000
@@ -0,0 +1,258 @@
+// S25FL256S.cpp
+
+#include"S25FL256S.h"
+
+// CONSTRUCTOR
+S25FL256S::S25FL256S(PinName mosi, PinName miso, PinName sclk, PinName cs) : SPI(mosi, miso, sclk), _cs(cs)
+{
+    this->format(SPI_NBIT, SPI_MODE);
+    this->frequency(SPI_FREQ);
+    chipDisable();
+}
+// READING
+int S25FL256S::readByte(int addr)
+{
+    chipEnable();
+    this->write(FOUR_READ);
+    this->write((addr & ADDR_BMASK3) >> ADDR_BSHIFT3);
+    this->write((addr & ADDR_BMASK2) >> ADDR_BSHIFT2);
+    this->write((addr & ADDR_BMASK1) >> ADDR_BSHIFT1);
+    this->write((addr & ADDR_BMASK0) >> ADDR_BSHIFT0);
+    int response = this->write(DUMMY_ADDR);
+    chipDisable();
+    return response;
+}
+
+void S25FL256S::readStream(int addr, char* buf, int count)
+{
+    if (count < 1)
+        return;
+    chipEnable();
+    this->write(FOUR_READ);
+    this->write((addr & ADDR_BMASK3) >> ADDR_BSHIFT3);
+    this->write((addr & ADDR_BMASK2) >> ADDR_BSHIFT2);
+    this->write((addr & ADDR_BMASK1) >> ADDR_BSHIFT1);
+    this->write((addr & ADDR_BMASK0) >> ADDR_BSHIFT0);
+    for (int i = 0; i < count; i++) {
+        buf[i] =  this->write(DUMMY_ADDR);
+        printf("i= %d   :%c \r\n",i,buf[i]);
+    }
+    chipDisable();
+}
+
+// WRITING
+void S25FL256S::writeByte(int addr, int data)
+{
+    writeEnable();
+    chipEnable();
+    this->write(FOUR_PP);
+    this->write((addr & ADDR_BMASK3) >> ADDR_BSHIFT3);
+    this->write((addr & ADDR_BMASK2) >> ADDR_BSHIFT2);
+    this->write((addr & ADDR_BMASK1) >> ADDR_BSHIFT1);
+    this->write((addr & ADDR_BMASK0) >> ADDR_BSHIFT0);
+    this->write(data);
+    chipDisable();
+    writeDisable();
+    // wait(WAIT_TIME);//instead of wait poll for WIP flag of status reg or use checkIfBusy() function...see main for more dtails 
+}
+
+void S25FL256S::writeStream(int addr, char* buf, int count)
+{
+    if (count < 1)
+        return;
+    writeEnable();
+    wait(0.1);
+    chipEnable();
+    this->write(FOUR_PP);
+    this->write((addr & ADDR_BMASK3) >> ADDR_BSHIFT3);
+    this->write((addr & ADDR_BMASK2) >> ADDR_BSHIFT2);
+    this->write((addr & ADDR_BMASK1) >> ADDR_BSHIFT1);
+    this->write((addr & ADDR_BMASK0) >> ADDR_BSHIFT0);
+    for (int i = 0; i < count; i++) {
+        this->write(buf[i]);
+    }
+    wait(0.1);
+    chipDisable();
+    writeDisable();
+    wait(WAIT_TIME);
+}
+
+void S25FL256S::writeString(int addr, string str)
+{
+    if (str.length() < 1)
+        return;
+    writeEnable();
+    chipEnable();
+    this->write(FOUR_PP);
+    this->write((addr & ADDR_BMASK3) >> ADDR_BSHIFT3);
+    this->write((addr & ADDR_BMASK2) >> ADDR_BSHIFT2);
+    this->write((addr & ADDR_BMASK1) >> ADDR_BSHIFT1);
+    this->write((addr & ADDR_BMASK0) >> ADDR_BSHIFT0);
+    for (int i = 0; i < str.length(); i++)
+        this->write(str.at(i));
+    chipDisable();
+    writeDisable();
+    wait(WAIT_TIME);//instead of wait poll for WIP flag of status reg or use checkIfBusy() function...see main for more dtails 
+}
+
+
+
+uint8_t S25FL256S::readRegister()
+{
+
+    chipEnable();
+    this->write(RDSR1);
+    uint8_t val=this->write(DUMMY_ADDR);
+    chipDisable();
+   //wait(WAIT_TIME);//instead of wait poll for WIP flag of status reg or use checkIfBusy() function...see main for more dtails 
+    //printf("value of reg is %X  \r\n",val);
+    return(val);
+
+}
+//ERASING
+void S25FL256S::chipErase()
+{
+    writeEnable();
+    chipEnable();
+    this->write(BE);
+    chipDisable();
+    writeDisable();
+    wait(WAIT_TIME);//instead of wait poll for WIP flag of status reg or use checkIfBusy() function...see main for more dtails 
+}
+
+void S25FL256S::Read_Identification(uint8_t *buf)
+{
+
+
+    chipEnable();
+    this->write(RDID);
+    for(int i=0; i<80; i++)
+        buf[i]=this->write(DUMMY_ADDR);
+    chipDisable();
+    wait(WAIT_TIME);//instead of wait poll for WIP flag of status reg or use checkIfBusy() function...see main for more dtails 
+}
+
+void S25FL256S::sectorErase(int addr)
+{
+    writeEnable();
+    chipEnable();
+    this->write(FOUR_SE);
+    this->write((addr & ADDR_BMASK3) >> ADDR_BSHIFT3);
+    this->write((addr & ADDR_BMASK2) >> ADDR_BSHIFT2);
+    this->write((addr & ADDR_BMASK1) >> ADDR_BSHIFT1);
+    this->write((addr & ADDR_BMASK0) >> ADDR_BSHIFT0);
+    chipDisable();
+    writeDisable();
+    wait(WAIT_TIME);//instead of wait poll for WIP flag of status reg or use checkIfBusy() function...see main for more dtails 
+}
+void S25FL256S::reset()
+{
+    writeEnable();
+    chipEnable();
+    this->write(RESET);
+    chipDisable();
+    writeDisable();
+}
+
+uint8_t S25FL256S::checkIfBusy()
+{
+    uint8_t value=readRegister();
+    printf("Value of Status Reg=%X\r\n\r\n",value);
+    if((value&0x01)==0x01)
+        return 1;
+    else
+        return 0;
+
+}
+void S25FL256S::writeRegister(uint8_t regValue)
+{
+    writeEnable();
+    chipEnable();
+    this->write(WRR);
+    this->write(regValue);
+    chipDisable();
+    writeDisable();
+    wait(WAIT_TIME);//instead of wait poll for WIP flag of status reg or use checkIfBusy() function...see main for more dtails 
+
+}
+
+void S25FL256S::clearRegister(void)
+{
+    writeEnable();
+    chipEnable();
+    this->write(CLSR);
+    chipDisable();
+    writeDisable();
+    wait(WAIT_TIME);//instead of wait poll for WIP flag of status reg or use checkIfBusy() function...see main for more dtails 
+
+}
+
+
+void S25FL256S::writeLong(int addr, long value)
+{
+    //Decomposition from a long to 4 bytes by using bitshift.
+    //One = Most significant -> Four = Least significant byte
+    uint8_t four = (value & 0xFF);
+    uint8_t three = ((value >> 8) & 0xFF);
+    uint8_t two = ((value >> 16) & 0xFF);
+    uint8_t one = ((value >> 24) & 0xFF);
+
+    writeEnable();
+    chipEnable();
+    this->write(FOUR_PP);
+    this->write((addr & ADDR_BMASK3) >> ADDR_BSHIFT3);
+    this->write((addr & ADDR_BMASK2) >> ADDR_BSHIFT2);
+    this->write((addr & ADDR_BMASK1) >> ADDR_BSHIFT1);
+    this->write((addr & ADDR_BMASK0) >> ADDR_BSHIFT0);
+    this->write(four);
+    this->write(three);
+    this->write(two);
+    this->write(one);
+    chipDisable();
+    writeDisable();
+    wait(0.1);
+}
+
+long S25FL256S::raedLong(int addr)
+{
+    //Read the 4 bytes from the eeprom memory.
+    writeEnable();
+    chipEnable();
+    this->write(FOUR_READ);
+    this->write((addr & ADDR_BMASK3) >> ADDR_BSHIFT3);
+    this->write((addr & ADDR_BMASK2) >> ADDR_BSHIFT2);
+    this->write((addr & ADDR_BMASK1) >> ADDR_BSHIFT1);
+    this->write((addr & ADDR_BMASK0) >> ADDR_BSHIFT0);
+
+    long four = this->write(DUMMY_ADDR);
+    long three = this->write(DUMMY_ADDR);
+    long two = this->write(DUMMY_ADDR);
+    long one = this->write(DUMMY_ADDR);
+
+    //Return the recomposed long by using bitshift.
+    return ((four << 0) & 0xFF) + ((three << 8) & 0xFFFF) + ((two << 16) & 0xFFFFFF) + ((one << 24) & 0xFFFFFFFF);
+}
+
+
+//ENABLE/DISABLE (private functions)
+void S25FL256S::writeEnable()
+{
+    chipEnable();
+    this->write(WREN);
+    chipDisable();
+}
+void S25FL256S::writeDisable()
+{
+    chipEnable();
+    this->write(WRDI);
+    chipDisable();
+}
+void S25FL256S::chipEnable()
+{
+    _cs = 0;
+}
+void S25FL256S::chipDisable()
+{
+    _cs = 1;
+}
+