Diff: mcp482x.cpp

Revision:

1:277e5be610bc

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mcp482x.cpp	Sun Dec 15 02:42:11 2013 +0000
@@ -0,0 +1,108 @@
+#include "mbed.h"
+#include "mcp482x.h"
+
+using namespace mbed;
+
+MCP482X::MCP482X(SPI &spi, void(*sel)(void), void(*usel)(void)): _spi(spi) {
+    gainA = 1;
+    gainB = 1;
+    valA = 0;
+    valB = 0;
+    selectfxn = sel;
+    unselectfxn = usel;     
+    enable();    
+}
+
+MCP482X::~MCP482X() {
+}
+
+int MCP482X::writeA(int value){
+    int tempval = 0;
+    valA = (value & 0x0FFF);
+    tempval = SELECTDACA(valA);
+    
+    if(gainA == 1) {
+        tempval = SELECT1XGAIN(tempval);           
+    } else {
+        tempval = SELECT2XGAIN(tempval);        
+    }
+    
+    if(bshutdown==true) {
+        tempval = SELECTPWROFF(tempval);
+    } else {
+        tempval = SELECTPWRON(tempval);
+    }
+    
+    sendValue(tempval);
+    return tempval;
+}
+
+int MCP482X::writeB(int value){
+
+    int tempval = 0;
+    valB = (value & 0x0FFF);
+    tempval = SELECTDACB(valB);
+    
+    if(gainB == 1) {
+        tempval = SELECT1XGAIN(tempval);           
+    } else {
+        tempval = SELECT2XGAIN(tempval);        
+    }
+    
+    if(bshutdown==true) {
+        tempval = SELECTPWROFF(tempval);
+    } else {
+        tempval = SELECTPWRON(tempval);
+    }
+    
+    sendValue(tempval);
+    return tempval;
+}
+
+void MCP482X::setGainA(int value){
+    if(value==1 || value == 2)
+        gainA = value;
+    else
+        gainA = 1;
+}
+
+void MCP482X::setGainB(int value){
+    if(value==1 || value == 2)
+        gainB = value;
+    else
+        gainB = 1;
+}
+
+void MCP482X::disable() {
+    bshutdown = true;
+    writeA(valA);
+    writeB(valB);        
+}
+
+void MCP482X::enable() {
+    bshutdown = false;
+    writeA(valA);
+    writeB(valB);
+}
+
+void MCP482X::configspi() {
+    _spi.format(16, 0);
+    //_spi.frequency();
+}
+
+void MCP482X::sendValue(int value) {    
+    select();
+    _spi.write(value);    
+    deselect();
+}
+
+void MCP482X::select() {
+    //Set CS low to start transmission (interrupts conversion)   
+    configspi(); 
+    selectfxn();
+}
+
+void MCP482X::deselect() {
+    //Set CS high to stop transmission (restarts conversion)    
+    unselectfxn();    
+}
\ No newline at end of file