Revision 1:4e6619093761, committed 2013-12-15

Comitter:

henryeherman

Date:

Sun Dec 15 02:42:30 2013 +0000

Parent:

0:b58572ce83b6

Commit message:

Working Dual ADC library

Changed in this revision

--- a/MCP482X.cpp	Wed Aug 14 00:21:42 2013 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,97 +0,0 @@
-#include "mbed.h"
-#include "MCP482X.h"
-
-using namespace mbed;
-
-MCP482X::MCP482X(SPI &spi, DigitalOut &cspin): _spi(spi), _cspin(cspin) {
-    gainA = 1;
-    gainB = 1;
-    valA = 0;
-    valB = 0;     
-    enable();
-    _cspin.write(1);
-}
-
-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(50000);
-}
-
-void MCP482X::sendValue(int value) {
-    configspi();
-    _cspin.write(0);
-    _spi.write(value);    
-    _cspin.write(1);
-}
\ No newline at end of file

--- a/MCP482X.h	Wed Aug 14 00:21:42 2013 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,82 +0,0 @@
-#include "mbed.h"
-#include "bit.h"
-#ifndef MCP482X_H
-#define MCP482X_H
-
-#define MCP482X_VREF 2048
-
-#define DACSELBIT       BIT(15)
-#define DACUNDEF        BIT(14)
-#define GAINBIT         BIT(13)
-#define SHDNBIT         BIT(12)
-
-#define SELECTDACA(VALUE)        CLEARBITS(VALUE,DACSELBIT)
-#define SELECTDACB(VALUE)        SETBITS(VALUE,DACSELBIT)
-#define SELECT1XGAIN(VALUE)      SETBITS(VALUE,GAINBIT)
-#define SELECT2XGAIN(VALUE)      CLEARBITS(VALUE,GAINBIT)
-#define SELECTPWRON(VALUE)       SETBITS(VALUE, SHDNBIT)
-#define SELECTPWROFF(VALUE)      CLEARBITS(VALUE, SHDNBIT)
-
-// BITS 0-11 set the output voltage!!!
-
-class MCP482X {
-public:
-
-/*
-* Constructor
-*/
-MCP482X(SPI &spi, DigitalOut &cspin);
-
-/*
-* Destructor
-*/
-~MCP482X();
-
-/*
-* Write to DAC A
-*/
-int writeA(int value);
-
-
-/*
-* Write to DAC B
-*/
-int writeB(int value);
-
-
-/*
-* Set Gain for DAC A 1 or 2
-*/
-void setGainA(int value);
-
-
-/*
-* Set Gain for DAC B 1 or 2
-*/
-void setGainB(int value);
-
-/*
-* Shutdown DAC
-*/
-void disable();
-
-/*
-* Power On DAC
-*/
-void enable();
-
-private:
-
-int gainA;
-int gainB;
-int valA;
-int valB;    
-bool bshutdown;
-SPI &_spi;
-DigitalOut &_cspin;
-
-void configspi();
-void sendValue(int value);
-}; // end class MCP482X
-
-#endif //MCP482X_H
\ No newline at end of file

--- /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();    
+}
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mcp3202.h	Sun Dec 15 02:42:30 2013 +0000
@@ -0,0 +1,71 @@
+#include "mbed.h"
+#include "bit.h"
+#ifndef MCP3202_H
+#define MCP3202_H
+
+#define MCP482X_VREF 2048
+
+#define STARTBIT    BIT(0)
+#define SGL_DIFF    BIT(7)
+#define ODD_SIGN    BIT(6)
+#define MSBF        BIT(5)
+
+#define SELECTSTART(VALUE)       SETBITS(VALUE,STARTBIT)
+#define SELECTDACB(VALUE)        SETBITS(VALUE,DACSELBIT)
+#define SELECT1XGAIN(VALUE)      SETBITS(VALUE,GAINBIT)
+#define SELECT2XGAIN(VALUE)      CLEARBITS(VALUE,GAINBIT)
+#define SELECTPWRON(VALUE)       SETBITS(VALUE, SHDNBIT)
+#define SELECTPWROFF(VALUE)      CLEARBITS(VALUE, SHDNBIT)
+
+// BITS 0-11 set the output voltage!!!
+
+class MCP3202 {
+public:
+
+/*
+* Constructor
+*/
+MCP3202(SPI &spi, void(*sel)(void), void(*usel)(void));
+
+/*
+* Destructor
+*/
+~MCP3202();
+
+/*
+* Write to DAC A
+*/
+int readA();
+
+
+/*
+* Write to DAC B
+*/
+int readB();
+
+/*
+* Shutdown DAC
+*/
+void disable();
+
+/*
+* Power On DAC
+*/
+void enable();
+
+void select();
+
+void deselect();
+
+private:
+
+void(*selectfxn)(void);
+void(*unselectfxn)(void);
+bool bshutdown;
+SPI &_spi;
+
+void configspi();
+void sendValue(int value);
+}; // end class MCP3202
+
+#endif //MCP3202_H
\ No newline at end of file