Diff: 23LCV1024.cpp

Revision:

0:937ac9b5da23

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/23LCV1024.cpp	Tue Mar 18 16:33:22 2014 +0000
@@ -0,0 +1,54 @@
+#include "mbed.h"
+#include "23LCV1024.h"
+
+SRAM23LCV1024::SRAM23LCV1024(SPI& spi, PinName cs) : _spi(spi), _cs(cs) {
+    _cs = 1;    // Deselect the device so that it can initialize
+}
+    
+int SRAM23LCV1024::getReadMode() {
+    /* The mode bits indicate the operating mode of the SRAM:
+        00 = Byte mode
+        10 = Page mode
+        01 = Sequential mode (default)
+        11 = Reserved
+    */
+    
+    _cs = 0;
+    _spi.write(CMD_RDMR);
+    int ram_mode =  _spi.write(0)>>6;
+    _cs = 1;
+
+    return ram_mode;
+}
+        
+int SRAM23LCV1024::readBytes(int address, char* buffer, int length) {   
+    int i;
+ 
+    _cs = 0;
+    _spi.write(CMD_READ);
+    _spi.write((address >> 16) & 0xff);
+    _spi.write((address >> 8) & 0xff);
+    _spi.write(address & 0xff);
+ 
+    for (i = 0; i < length; i ++) buffer[i] = _spi.write(0);
+
+    _cs = 1;
+    return 0;
+}
+        
+        
+int SRAM23LCV1024::writeBytes(int address, char* buffer, int length) {
+    int i;
+ 
+    _cs = 0;
+    _spi.write(CMD_WRITE);
+    _spi.write((address >> 16) & 0xff);
+    _spi.write((address >> 8) & 0xff);
+    _spi.write(address & 0xff);
+ 
+    for (i = 0; i < length; i ++) _spi.write(buffer[i]);
+
+    _cs = 1;
+    return 0;
+}
+   
\ No newline at end of file