Diff: mcp3202.cpp

Revision:

1:4e6619093761

diff -r b58572ce83b6 -r 4e6619093761 mcp3202.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mcp3202.cpp	Sun Dec 15 02:42:30 2013 +0000
@@ -0,0 +1,65 @@
+#include "mbed.h"
+#include "mcp3202.h"
+
+using namespace mbed;
+
+MCP3202::MCP3202(SPI &spi, void(*sel)(void), void(*usel)(void)): _spi(spi) {    
+    selectfxn = sel;
+    unselectfxn = usel;     
+    enable();    
+}
+
+MCP3202::~MCP3202() {
+}
+
+int MCP3202::readA(){
+    //printf("Read A\r\n");
+    select();
+    _spi.write(STARTBIT);
+    int upperbyte = _spi.write(SGL_DIFF|MSBF);
+    int lowerbyte = _spi.write(0x00);
+    deselect();
+    int value = ((0x0F & upperbyte) << 8) | lowerbyte;
+    return value;
+}
+
+int MCP3202::readB(){
+    //printf("Read B\r\n");
+    select();
+    _spi.write(STARTBIT);
+    int upperbyte = _spi.write(SGL_DIFF|ODD_SIGN|MSBF);
+    int lowerbyte = _spi.write(0x00);
+    deselect();
+    int value = ((0x0F & upperbyte) << 8) | lowerbyte;
+    return value;
+}
+
+void MCP3202::disable() {
+    bshutdown = true;       
+}
+
+void MCP3202::enable() {
+    bshutdown = false;
+}
+
+void MCP3202::configspi() {
+    _spi.format(8, 0);
+    //_spi.frequency();
+}
+
+void MCP3202::sendValue(int value) {    
+    select();
+    _spi.write(value);    
+    deselect();
+}
+
+void MCP3202::select() {
+    //Set CS low to start transmission (interrupts conversion)   
+    configspi(); 
+    selectfxn();
+}
+
+void MCP3202::deselect() {
+    //Set CS high to stop transmission (restarts conversion)    
+    unselectfxn();    
+}
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