Mark Randall
Simple library to use the TI ADC0848 with the MBED Ports Library. This Library can be used either in polling or interrupt modes.
Revision 0:a76d9079d07b, committed 2013-10-07
- Comitter:
- mr63
- Date:
- Mon Oct 07 21:49:38 2013 +0000
- Commit message:
- Simple library to use the TI ADC0848 with the MBED Ports Library. This Library can be used either in polling or interrupt modes.
Changed in this revision
diff -r 000000000000 -r a76d9079d07b ADC0848.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/ADC0848.cpp Mon Oct 07 21:49:38 2013 +0000
@@ -0,0 +1,93 @@
+#include "ADC0848.h"
+
+
+unsigned char A2DValue[8] = {0,0,0,0,0,0,0,0};
+
+//ADC0848 Class Constructor for polling A2D using int ADC0848::Poll_A2D(unsigned char Channel)
+ADC0848::ADC0848(PinName pin1, PinName pin2, PinName pin3, PinName pin4, PinName pin5, PinName pin6, PinName pin7, PinName pin8, PinName pin9, PinName pin10, PinName pin11)
+ :_DataBus(pin1,pin2,pin3,pin4,pin5,pin6,pin7,pin8), _WR(pin9), _RD(pin10),_intS(NC),_intP(pin11)
+{
+ _WR = 1;
+ _RD = 1;
+ _intP.mode(PullUp);
+ _scan = false;
+}
+//ADC0848 Class Constructor for scanning all channels of continues using interrupts A2D vales can be using int ADC0848::GetA2D(unsigned char Channel)
+//char ADC0848::Start_Scan() must be called to start a conversion
+ADC0848::ADC0848(PinName pin1, PinName pin2, PinName pin3, PinName pin4, PinName pin5, PinName pin6, PinName pin7, PinName pin8, PinName pin9, PinName pin10, PinName pin11,bool Scan)
+ :_DataBus(pin1,pin2,pin3,pin4,pin5,pin6,pin7,pin8), _WR(pin9), _RD(pin10),_intS(pin11),_intP(NC), _scan(Scan)
+{
+ _WR = 1;
+ _RD = 1;
+ _intS.mode(PullUp);
+ _intS.fall_add(this,&ADC0848::DIGI_IO_ISR);
+}
+
+
+void ADC0848::DIGI_IO_ISR() // ISR used if in scanning mode to scan the 8 channels of the ADC The values are stored in unsigned char A2DValue[8]
+{
+ static unsigned char channel_num=0;
+ _DataBus.input();
+ _RD = 0;
+ A2DValue[channel_num] = _DataBus;
+ _RD = 1;
+ channel_num++;
+ if(channel_num > 7)
+ channel_num=0;
+ _DataBus.output();
+ _DataBus=0x08 | channel_num;
+ _WR = 0;
+ _WR = 1;
+}
+
+int ADC0848::Start_Scan()
+{
+ if(_scan)
+ {
+ _DataBus.output(); //start 1st conversion
+ _DataBus=0x08;
+ _WR = 0;
+ _WR = 1;
+ return(1);
+ }
+ else
+ {
+ return(-1);
+ }
+}
+
+int ADC0848::GetA2D(unsigned char Channel) //Returns the Value of the the channel requested when in scanning mode. If not in scanning mode the function returns -1
+{
+ if(_scan)
+ {
+ return((int)A2DValue[Channel]);
+ }
+ else
+ {
+ return(-1);
+ }
+}
+
+int ADC0848::Poll_A2D(unsigned char Channel) //Returns the Value of the the channel requested when in polling mode. If not in polling mode the function returns -1
+{
+ if(!_scan)
+ {
+ char data;
+ _DataBus.output();
+ _DataBus=0x08 | Channel;
+ _WR = 0;
+ _WR = 1;
+ while(_intP);
+ _DataBus.input();
+ _RD = 0;
+ data = _DataBus;
+ _RD = 1;
+ return ((int)data);
+ }
+ else
+ {
+ return(-1);
+ }
+}
+
+
diff -r 000000000000 -r a76d9079d07b ADC0848.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/ADC0848.h Mon Oct 07 21:49:38 2013 +0000
@@ -0,0 +1,36 @@
+#include "mbed.h"
+
+
+class ADC0848 {
+public: //Strobe //CLK //Data
+
+ ADC0848(PinName pin1, PinName pin2, PinName pin3, PinName pin4, PinName pin5, PinName pin6, PinName pin7, PinName pin8, PinName pin9, PinName pin10, PinName pin11);
+ ADC0848(PinName pin1, PinName pin2, PinName pin3, PinName pin4, PinName pin5, PinName pin6, PinName pin7, PinName pin8, PinName pin9, PinName pin10, PinName pin11 , bool Scan);
+
+ int Start_Scan();
+ int GetA2D(unsigned char Channel);
+ int Poll_A2D(unsigned char Channel);
+
+
+private:
+
+ BusInOut _DataBus;
+ DigitalOut _WR;
+ DigitalOut _RD;
+ InterruptIn _intS;
+ DigitalIn _intP;
+ bool _scan;
+
+ void DIGI_IO_ISR(void);
+
+
+};
+
+
+
+
+
+
+
+
+
diff -r 000000000000 -r a76d9079d07b main.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Mon Oct 07 21:49:38 2013 +0000
@@ -0,0 +1,32 @@
+#include "mbed.h"
+#include "ADC0848.h"
+
+Serial pc(USBTX, USBRX); // tx, rx
+//ADC0848 A2D(p13,p14,p15,p16,p17,p18,p19,p20,p12,p10,p11);//using polling constructor
+ADC0848 A2D(p13,p14,p15,p16,p17,p18,p19,p20,p12,p10,p11,true);//using scanning constructor
+int main()
+{
+ A2D.Start_Scan();
+ while(1)
+ {
+// pc.printf("Value0= %u\n",A2D.Poll_A2D(0));
+// pc.printf("Value1= %u\n",A2D.Poll_A2D(1));
+// pc.printf("Value2= %u\n",A2D.Poll_A2D(2));
+// pc.printf("Value3= %u\n",A2D.Poll_A2D(3));
+// pc.printf("Value4= %u\n",A2D.Poll_A2D(4));
+// pc.printf("Value5= %u\n",A2D.Poll_A2D(5));
+// pc.printf("Value6= %u\n",A2D.Poll_A2D(6));
+// pc.printf("Value7= %u\n",A2D.Poll_A2D(7));
+ pc.printf("Value0= %u\n",A2D.GetA2D(0));
+ pc.printf("Value1= %u\n",A2D.GetA2D(1));
+ pc.printf("Value2= %u\n",A2D.GetA2D(2));
+ pc.printf("Value3= %u\n",A2D.GetA2D(3));
+ pc.printf("Value4= %u\n",A2D.GetA2D(4));
+ pc.printf("Value5= %u\n",A2D.GetA2D(5));
+ pc.printf("Value6= %u\n",A2D.GetA2D(6));
+ pc.printf("Value7= %u\n",A2D.GetA2D(7));
+ wait(1);
+ }
+}
+
+