Diff: W25Q80BV.cpp

Revision:

0:6f374c3ed666

Child:

1:72b556f51896

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/W25Q80BV.cpp	Wed Jan 29 02:05:38 2014 +0000
@@ -0,0 +1,152 @@
+// W25Q80BV.cpp
+//Changes by Ciprijal
+
+#include"W25Q80BV.h"
+
+// Pinout: PTD2,PTD3, PTD1, PTC7
+
+// CONSTRUCTOR 
+W25Q80BV::W25Q80BV(PinName mosi, PinName miso, PinName sclk, PinName cs):_cs(cs),_mosi(mosi),_miso(miso),_sclk(sclk){
+    
+}
+
+
+
+//Get ID
+ int W25Q80BV::getMID( ){
+    int ID = 0;
+    chipEnable();
+    this->writeSPI(D_ID);
+    this->writeSPI(DUMMY_ADDR);
+    this->writeSPI(DUMMY_ADDR);
+    this->writeSPI(DUMMY_ADDR);
+    this->writeSPI(DUMMY_ADDR);
+    ID      = this->writeSPI(DUMMY_ADDR);
+    chipDisable(); 
+    return ID;
+} 
+
+
+// READING
+int W25Q80BV::readByte(int addr) {
+    chipEnable();
+    this->writeSPI(R_INST);
+    this->writeSPI((addr & ADDR_BMASK2) >> ADDR_BSHIFT2);
+    this->writeSPI((addr & ADDR_BMASK1) >> ADDR_BSHIFT1);
+    this->writeSPI((addr & ADDR_BMASK0) >> ADDR_BSHIFT0);
+    int response = this->writeSPI(DUMMY_ADDR);
+    chipDisable();
+    return response;
+}
+int W25Q80BV::readByte(int a2, int a1, int a0) {
+   chipEnable();
+   this->writeSPI(R_INST);
+   this->writeSPI(a2);
+   this->writeSPI(a1);
+   this->writeSPI(a0);
+   int response = this->writeSPI(DUMMY_ADDR);
+    chipDisable();
+    return response;
+}
+void W25Q80BV::readStream(int addr, char* buf, int count) {
+    if (count < 1)
+        return;
+    chipEnable();
+    this->writeSPI(R_INST);
+    this->writeSPI((addr & ADDR_BMASK2) >> ADDR_BSHIFT2);
+    this->writeSPI((addr & ADDR_BMASK1) >> ADDR_BSHIFT1);
+    this->writeSPI((addr & ADDR_BMASK0) >> ADDR_BSHIFT0);
+    for (int i = 0; i < count; i++)
+        buf[i] =  this->writeSPI(DUMMY_ADDR);
+    chipDisable();
+}
+
+// WRITING
+void W25Q80BV::writeByte(int addr, int data) {
+    writeEnable();
+    chipEnable();
+    this->writeSPI(W_INST);
+    this->writeSPI((addr & ADDR_BMASK2) >> ADDR_BSHIFT2);
+    this->writeSPI((addr & ADDR_BMASK1) >> ADDR_BSHIFT1);
+    this->writeSPI((addr & ADDR_BMASK0) >> ADDR_BSHIFT0);
+    this->writeSPI(data);
+    chipDisable();
+    writeDisable();
+    wait(WAIT_TIME);
+}
+void W25Q80BV::writeByte(int a2, int a1, int a0, int data) {
+    writeEnable();
+    chipEnable();
+    this->writeSPI(W_INST);
+    this->writeSPI(a2);
+    this->writeSPI(a1);
+    this->writeSPI(a0);
+    this->writeSPI(data);
+    chipDisable();
+    writeDisable();
+    wait(WAIT_TIME);
+}
+void W25Q80BV::writeStream(int addr, char* buf, int count) {
+    if (count < 1)
+        return;
+    writeEnable();
+    chipEnable();
+    this->writeSPI(W_INST);
+    this->writeSPI((addr & ADDR_BMASK2) >> ADDR_BSHIFT2);
+    this->writeSPI((addr & ADDR_BMASK1) >> ADDR_BSHIFT1);
+    this->writeSPI((addr & ADDR_BMASK0) >> ADDR_BSHIFT0);
+    for (int i = 0; i < count; i++)
+        this->writeSPI(buf[i]);
+    chipDisable();
+    writeDisable();
+    wait(WAIT_TIME);
+}
+
+//ERASING
+void W25Q80BV::chipErase() {
+    writeEnable();
+    chipEnable();
+    this->writeSPI(C_ERASE_INST);
+    chipDisable();
+    writeDisable();
+    wait(WAIT_TIME);
+}
+    
+
+//ENABLE/DISABLE (private functions)
+void W25Q80BV::writeEnable() {
+    chipEnable();
+    this->writeSPI(WE_INST);
+    chipDisable();
+}
+void W25Q80BV::writeDisable() {
+    chipEnable();
+    this->writeSPI(WD_INST);
+    chipDisable();
+}
+void W25Q80BV::chipEnable() {
+    _cs = 0;
+}
+void W25Q80BV::chipDisable() {
+    _cs = 1;
+}
+//Sends and receives 1 byte of SPI data MSB endianness
+int writeSPI(int data){
+    
+    int aux =0,aux2=0,i=0,read=0;
+    //aux=data;
+    for(i=0;i<8;i++){
+        _sclk   =   0;
+        //output
+        aux     =   data&0x80;
+        aux     =   aux>>7;
+        _mosi   =   aux;
+        data    =   data>>1;
+        //input
+        read    =   read<<1;
+        aux2    =   _miso;
+        read    =   read|aux2;
+    }
+    read = read>1; //This might not be needed
+    return read;
+}
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