Revision 1:7dde73ad2b78, committed 2013-12-15

Comitter:

henryeherman

Date:

Sun Dec 15 02:42:47 2013 +0000

Parent:

0:b58572ce83b6

Commit message:

Working 8 channel 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/mcp3208.cpp	Sun Dec 15 02:42:47 2013 +0000
@@ -0,0 +1,116 @@
+#include "mbed.h"
+#include "mcp3208.h"
+
+using namespace mbed;
+
+mcp3208::mcp3208(SPI &spi, void(*sel)(void), void(*usel)(void)): _spi(spi) {    
+    selectfxn = sel;
+    unselectfxn = usel;         
+}
+
+mcp3208::~mcp3208() {
+}
+
+int mcp3208::read0(){
+    //printf("Read 0\r\n");
+    select();
+    _spi.write(USELECTADC0);
+    int upperbyte = _spi.write(LSELECTADC0);
+    int lowerbyte = _spi.write(0x00);
+    deselect();
+    int value = ((0x0F & upperbyte) << 8) | lowerbyte;
+    return value;
+}
+
+int mcp3208::read1(){
+    //printf("Read 1\r\n");
+    select();
+    _spi.write(USELECTADC1);
+    int upperbyte = _spi.write(LSELECTADC1);
+    int lowerbyte = _spi.write(0x00);
+    deselect();
+    int value = ((0x0F & upperbyte) << 8) | lowerbyte;
+    return value;
+}
+
+int mcp3208::read2(){
+    //printf("Read 2\r\n");
+    select();
+    _spi.write(USELECTADC2);
+    int upperbyte = _spi.write(LSELECTADC2);
+    int lowerbyte = _spi.write(0x00);
+    deselect();
+    int value = ((0x0F & upperbyte) << 8) | lowerbyte;
+    return value;
+}
+
+int mcp3208::read3(){
+    //printf("Read 3\r\n");
+    select();
+    _spi.write(USELECTADC3);
+    int upperbyte = _spi.write(LSELECTADC3);
+    int lowerbyte = _spi.write(0x00);
+    deselect();
+    int value = ((0x0F & upperbyte) << 8) | lowerbyte;
+    return value;
+}
+
+int mcp3208::read4(){
+    //printf("Read 4\r\n");
+    select();
+    _spi.write(USELECTADC4);
+    int upperbyte = _spi.write(LSELECTADC4);
+    int lowerbyte = _spi.write(0x00);
+    deselect();
+    int value = ((0x0F & upperbyte) << 8) | lowerbyte;
+    return value;
+}
+
+int mcp3208::read5(){
+    //printf("Read 5\r\n");
+    select();
+    _spi.write(USELECTADC5);
+    int upperbyte = _spi.write(LSELECTADC5);
+    int lowerbyte = _spi.write(0x00);
+    deselect();
+    int value = ((0x0F & upperbyte) << 8) | lowerbyte;
+    return value;
+}
+
+int mcp3208::read6(){
+    //printf("Read 6\r\n");
+    select();
+    _spi.write(USELECTADC6);
+    int upperbyte = _spi.write(LSELECTADC6);
+    int lowerbyte = _spi.write(0x00);
+    deselect();
+    int value = ((0x0F & upperbyte) << 8) | lowerbyte;
+    return value;
+}
+
+int mcp3208::read7(){
+    //printf("Read 7\r\n");
+    select();
+    _spi.write(USELECTADC7);
+    int upperbyte = _spi.write(LSELECTADC7);
+    int lowerbyte = _spi.write(0x00);
+    deselect();
+    int value = ((0x0F & upperbyte) << 8) | lowerbyte;
+    return value;
+}
+
+void mcp3208::configspi() {
+    _spi.format(8, 0);
+    //_spi.frequency();
+}
+
+void mcp3208::select() {
+    //Set CS low to start transmission (interrupts conversion)   
+    configspi(); 
+    selectfxn();
+}
+
+void mcp3208::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/mcp3208.h	Sun Dec 15 02:42:47 2013 +0000
@@ -0,0 +1,117 @@
+#include "mbed.h"
+#include "bit.h"
+#ifndef MCP3208_H
+#define MCP3208_H
+
+#define MCP3208_STARTBIT        BIT(2)
+#define MCP3208_SGL_DIFF        BIT(1)
+#define MCP3208_ADCSEL2         BIT(0)
+#define MCP3208_ADCSEL1         BIT(7)
+#define MCP3208_ADCSEL0         BIT(6)
+
+#define USELECTADC0      (MCP3208_STARTBIT|MCP3208_SGL_DIFF)
+#define LSELECTADC0      (0)
+
+#define USELECTADC1      (MCP3208_STARTBIT|MCP3208_SGL_DIFF)
+#define LSELECTADC1      (MCP3208_ADCSEL0)
+
+#define USELECTADC2      (MCP3208_STARTBIT|MCP3208_SGL_DIFF)
+#define LSELECTADC2      (MCP3208_ADCSEL1)
+
+#define USELECTADC3      (MCP3208_STARTBIT|MCP3208_SGL_DIFF)
+#define LSELECTADC3      (MCP3208_ADCSEL1|MCP3208_ADCSEL0)
+
+#define USELECTADC4      (MCP3208_STARTBIT|MCP3208_SGL_DIFF|MCP3208_ADCSEL2)
+#define LSELECTADC4      (0)
+
+#define USELECTADC5      (MCP3208_STARTBIT|MCP3208_SGL_DIFF|MCP3208_ADCSEL2)
+#define LSELECTADC5      (MCP3208_ADCSEL0)
+
+#define USELECTADC6      (MCP3208_STARTBIT|MCP3208_SGL_DIFF|MCP3208_ADCSEL2)
+#define LSELECTADC6      (MCP3208_ADCSEL1)
+
+#define USELECTADC7      (MCP3208_STARTBIT|MCP3208_SGL_DIFF|MCP3208_ADCSEL2)
+#define LSELECTADC7      (MCP3208_ADCSEL1|MCP3208_ADCSEL0)
+
+
+// BITS 0-11 set the output voltage!!!
+
+class mcp3208 {
+public:
+
+/*
+* Constructor
+*/
+mcp3208(SPI &spi, void(*sel)(void), void(*usel)(void));
+
+/*
+* Destructor
+*/
+~mcp3208();
+
+/*
+* Write to DAC 0
+*/
+int read0();
+
+
+/*
+* Write to DAC 1
+*/
+int read1();
+
+/*
+* Write to DAC 2
+*/
+int read2();
+
+/*
+* Write to DAC 3
+*/
+int read3();
+
+/*
+* Write to DAC 4
+*/
+int read4();
+
+/*
+* Write to DAC 5
+*/
+int read5();
+
+/*
+* Write to DAC 6
+*/
+int read6();
+
+/*
+* Write to DAC 7
+*/
+int read7();
+
+/*
+* Select the ADC for data retrievel
+*/
+void select();
+
+/*
+* Deselect the ADC
+*/
+void deselect();
+
+private:
+
+// These function pointer allows you to
+// use a routine to control the chip select line
+// important for me since all of my chip select lines are
+// controlled by a array of shift registers!
+void(*selectfxn)(void);
+void(*unselectfxn)(void);
+SPI &_spi;
+
+// Configure the SPI periphreal to drive our ADCs
+void configspi();
+}; // end class MCP3208
+
+#endif //MCP3208_H
\ No newline at end of file