Diff: W25X40BV.cpp

Revision:

0:9de212faf980

Child:

1:cd41b8e3fdad

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/W25X40BV.cpp	Mon Mar 19 10:20:37 2012 +0000
@@ -0,0 +1,90 @@
+// W25X40BV.cpp
+
+#include"W25X40BV.h"
+
+// CONSTRUCTOR 
+W25X40BV::W25X40BV(PinName mosi, PinName miso, PinName sclk, PinName cs) : _spi(mosi, miso, sclk), _cs(cs) {
+    _spi.format(SPI_NBIT, SPI_MODE);
+    _spi.frequency(SPI_FREQ);
+    chipDisable();
+}
+
+
+// READING
+int W25X40BV::read(int addr) {
+    chipEnable();
+    _spi.write(R_INST);
+    _spi.write((addr & ADDR_BMASK2) >> ADDR_BSHIFT2);
+    _spi.write((addr & ADDR_BMASK1) >> ADDR_BSHIFT1);
+    _spi.write((addr & ADDR_BMASK0) >> ADDR_BSHIFT0);
+    int response = _spi.write(DUMMY_ADDR);
+    chipDisable();
+    return response;
+}
+int W25X40BV::read(int a2, int a1, int a0) {
+   chipEnable();
+   _spi.write(R_INST);
+   _spi.write(a2);
+   _spi.write(a1);
+   _spi.write(a0);
+   int response = _spi.write(DUMMY_ADDR);
+    chipDisable();
+    return response;
+}
+
+
+// WRITING
+void W25X40BV::write(int addr, int data) {
+    writeEnable();
+    chipEnable();
+    _spi.write(W_INST);
+    _spi.write((addr & ADDR_BMASK2) >> ADDR_BSHIFT2);
+    _spi.write((addr & ADDR_BMASK1) >> ADDR_BSHIFT1);
+    _spi.write((addr & ADDR_BMASK0) >> ADDR_BSHIFT0);
+    _spi.write(data);
+    chipDisable();
+    writeDisable();
+    wait(WAIT_TIME);
+}
+void W25X40BV::write(int a2, int a1, int a0, int data) {
+    writeEnable();
+    chipEnable();
+    _spi.write(W_INST);
+    _spi.write(a2);
+    _spi.write(a1);
+    _spi.write(a0);
+    _spi.write(data);
+    chipDisable();
+     writeDisable();
+     wait(WAIT_TIME);
+}
+
+
+//ERASING
+void W25X40BV::chipErase() {
+    writeEnable();
+    chipEnable();
+    _spi.write(C_ERASE_INST);
+    chipDisable();
+    writeDisable();
+    wait(WAIT_TIME);
+}
+    
+
+//ENABLE/DISABLE (private functions)
+void W25X40BV::writeEnable() {
+    chipEnable();
+    _spi.write(WE_INST);
+    chipDisable();
+}
+void W25X40BV::writeDisable() {
+    chipEnable();
+    _spi.write(WD_INST);
+    chipDisable();
+}
+void W25X40BV::chipEnable() {
+    _cs = 0;
+}
+void W25X40BV::chipDisable() {
+    _cs = 1;
+}
\ No newline at end of file