Basic Stamp OEM module By Wilmer Arellano. 2  The BASIC Stamp 2 OEM is a discreet component version of the BS2 which may be purchased in kit form. 

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Presentation transcript:

Basic Stamp OEM module By Wilmer Arellano

2  The BASIC Stamp 2 OEM is a discreet component version of the BS2 which may be purchased in kit form.  The male header provides the means to ‘plug-it’ into your own board, or connect to other boards. Regulated 5V (Vdd) Ground- 0V (Vss) 5.5 – 15V input (Vin) Reset Input (RES) P0-P15 I/O Power the board with EITHER: A) VDC on Vin. This will also provide 5VDC regulated output on Vdd. B) Regulated 5V Input on Vdd.

Using the breadboard (Socket board) The bread board has many strips of metal (copper usually) which run underneath the board. The metal strips are laid out as shown in orange. The long top and bottom row of holes are usually used for power supply connections. To use the bread board, the legs of components are placed in the holes (the sockets). The holes are made so that they will hold the component in place. The circuit is built by placing components and connecting them together with jumper wires.

Connection 220 Ohm resistor should be connected to pin P4 of the OEM Basic Stamp 2sx. “+” (long) lead of LED should be connected to opposite side of the resistor. The other (short) lead of the LED goes to “-” 220 Ohm LED 9 V battery

' {$STAMP BS2sx} ' {$PBASIC 2.5} Green: 'Label Or point were you can RETURN LOW 4 'Set pin 4 an output pin and low voltage "0" PAUSE 1000 'Pause 1000 ms HIGH 4 'Set pin 4 an output pin and high voltage "1" PAUSE 1000 'Pause 1000 ms GOTO Green Flashing LED

' {$STAMP BS2sx} ' {$PBASIC 2.5} Green: 'Label Or point were you can RETURN LOW 4 'Set pin 4 an output pin and low voltage "0" PAUSE 1000 'Pause 1000 ms HIGH 4 'Set pin 4 an output pin and high voltage "1" PAUSE 1000 'Pause 1000 ms DEBUG ? IN1 'Input the value of pin 1 PAUSE 1000 'Pause 1000 ms GOTO Green Flashing LED + Switch Input

' {$STAMP BS2} ' {$PBASIC 2.5} OUTPUT 4 Green: PAUSE 1000 OUT4=1 PAUSE 1000 DEBUG ? IN1 PAUSE 1000 GOTO Green

' {$STAMP BS2} ' {$PBASIC 2.5} OUTPUT 4 INPUT 1 Green: OUT4=IN1 PAUSE 1000 GOTO Green

Variables Bit 0 or 1 Nibble (Nib) 0-15 Byte0-255 Word or to

' {$STAMP BS2} ' {$PBASIC 2.5} NS VAR Bit EW VAR Bit TOTAL VAR Byte NOC CON 20 TOTAL = 0 OUTPUT 4 INPUT 1 TOTAL = TOTAL +100 DEBUG ? TOTAL TOTAL= TOTAL/3 DEBUG ? TOTAL DEBUG ? NOC Green: OUT4=IN1 PAUSE 1000 GOTO Green

Pseudo Code Start of program Measure temperature  Temperature < 100 F? Yes, Turn on heat  Temperature > 102 F? Yes, Turn on cooling fan Go back to start.

13 Start Measure Temperature Temp. < 100 Energize Heater Temp. > 102 Energize Fan Star t Yes No Yes No

14 Sequential Flow Example Pseudo-Code: Start of program  Turn off LED 1  Turn off LED 2  Pause for 2 seconds  Light LED 1  Pause for 2 seconds  Light LED 2  End of program Flowchart: ' <<<< INSERT COMMON ' CIRCUIT DECLARATIONS >>>>CIRCUIT DECLARATIONS 'Prog 6A: Example of sequential flow ' ****** Main program ************ LED1 = LED_Off'Turn off LED 1 LED2 = LED_Off'Turn off LED 2 PAUSE 2000'Pause for 2 sec. LED1 = LED_On'Light LED 1 PAUSE 2000'Pause for 2 sec. LED2 = LED_On'Light LED 2 ENDCode: Start Turn OFF LED1 Turn OFF LED2 2 Second Pause Turn ON LED1 Turn ON LED2 2 Second Pause End

Branching Overview - GOTO Branching is the act of breaking out of a sequence to perform code in another location of the program. The simplest form of branching is to use the GOTO instruction: GOTO label

16 Looping Flow Example Pseudo-Code: Start of program  Turn off LED 1  Turn off LED 2  Pause for 2 seconds  Light LED 1  Pause for 2 seconds  Light LED 2  Go back to start ' <<<< INSERT COMMON ' CIRCUIT DECLARATIONS >>>>CIRCUIT DECLARATIONS 'Prog 6B: Example of sequential flow ' with looping ' ****** Main program ************ Main: LED1 = LED_Off'Turn off LED 1 LED2 = LED_Off'Turn off LED 2 PAUSE 2000'Pause for 2 sec. LED1 = LED_On'Light LED 1 PAUSE 2000'Pause for 2 sec. LED2 = LED_On'Light LED 2 GOTO Main'Repeat sequenceCode:Flowchart: Start Turn OFF LED1 Turn OFF LED2 2 Second Pause Turn ON LED1 Turn ON LED2 2 Second Pause

Conditionals Overview The previous example is an unconditional branch; the program will branch back to Main regardless of any code parameters. In a conditional branch a decision is made based on a current condition to branch or not to branch. As humans, we constantly make decisions based on input as to what to perform. Shower too cold? Turn up the hot. Shower too hot? Turn down the hot water. Microcontrollers can be programmed to act based on

IF…THEN The IF-THEN is the primary means of conditional branching. IF condition THEN addressLabel If the condition is evaluated to be true, execution will branch to the named address label. If the condition is not true, execution will continue to the next step in the program sequence. A condition is typically an equality: value1 = value2 value1 > value2 value1 < value2 IN8 = 1 Compared to many versions of BASIC and other languages, the PBASIC 2.0 implementation of the IF-THEN is fairly limited. See the PBASIC 2.5 appendix for new implementations of IF-THEN.

19 IF-THEN Example: Alarm  This program will sound the alarm as long as pushbutton 1 is pressed. Start: Is button 1 pressed?Is button 1 pressed? Yes, Go sound AlarmYes, Go sound Alarm No, Go back to startNo, Go back to startAlarm Sound speakerSound speaker Go back to start of programGo back to start of program ' <<<< INSERT SECTION 5 COMMON ' CIRCUIT DECLARATIONS >>>> CIRCUIT DECLARATIONS 'Prog 6C: Conditional Branching Alarm Main: ' If pushbutton 1 is pressed, ' then go sound alarm IF PB1 = PB_On THEN Alarm GOTO Main Alarm: 'Sound the alarm FREQOUT Speaker, 1000, 2000 GOTO Main Pseudo-Code Flowchart Program Code Button 1 Pressed Main Speaker 2000Hz for 1 second Main TrueFalse

' {$STAMP BS2} ' {$PBASIC 2.5} NS VAR Bit EW VAR Bit OUTPUT 4 OUTPUT 10 INPUT 1 Green: OUT4=1 OUT10=0 NS=IN1 IF NS=1 THEN green OUT4=0 OUT10=1 PAUSE GOTO Green

Car1 ' {$STAMP BS2sx} ' {$PBASIC 2.5} PAUSE 5000 HIGH 10 LOW 11 start: HIGH 4 HIGH 8 LOW 9 PAUSE 3000 LOW 4 LOW 8 PAUSE 3000 HIGH 9 PAUSE 3000 LOW 9 PAUSE 3000 GOTO start