PICAXE Microcontrollers An Introduction by NearSys

What is a PICAXE? A family of microcontrollers Based on the PIC microcontroller Internally programmed with an interpreter and communications program Program stored in the PIC’s internal EEPROM Interpreter operates on one instruction at a time

PICAXE Variations PICAXE-08M2 PICAXE-14M2 PICAXE-18M2 PICAXE-20M2 PICAXE-28X2 PICAXE-40X2

PICAXE Voltages Five volt chips, but can operate at 1.8 volts

PICAXE Multiple Programs PICAXE-08M2 PICAXE-14M2 PICAXE-18M2 PICAXE-20M2 PICAXE-28X2 PICAXE-40X2

PICAXE Multiple Programs PICAXE-08M2 PICAXE-14M2 PICAXE-18M2 PICAXE-20M2 PICAXE-28X2 PICAXE-40X2

PICAXE Clock Speed PICAXE-08M2 PICAXE-14M2 PICAXE-18M2 PICAXE-20M2 PICAXE-28X2 PICAXE-40X2

PICAXE Clock Speed PICAXE-08M2 PICAXE-14M2 PICAXE-18M2 PICAXE-20M2 PICAXE-28X2 PICAXE-40X2

PICAXE Pins Logic low < 1.4 V Up to four banks, A, B, C, and D depending on variation Most I/O pins are bidirectional Hardware interrupts on the X2

PICAXE Memory Program RAM Data Scratch Pad

PICAXE Memory Program RAM Data Scratch Pad

PICAXE Memory Program RAM (variables) Data Scratch Pad

PICAXE Memory Program RAM Data Scratch Pad

PICAXE Memory Program RAM (variables) Data Scratch Pad

Code Examples Input Commands PIN COUNT PULSIN SERIN READI2C READADC and READADC10 IRIN RFIN

Code Examples Output Commands HIGH and LOW PULSOUT SEROUT WRITEI2C PLAY and TUNE SERVO PMWOUT IROUT RFOUT

Code Examples Program Flow Control Commands GOTO GOSUB-RETURN FOR-NEXT DO-LOOP (UNTIL or WHILE) IF-THEN-ELSEIF ON-GOTO (GOSUB) SELECT-CASE BRANCH

Code Examples Communications Commands I2cslave ,i2cfast,i2cword writei2c 0,("hello") readi2c 0,(b0,b1,b2,b3,b4)

Code Examples Communications Commands serout B.0, T1200_4,(“Testing”) serin C.1, T1200_4,(“X”),B.0, B.1, B.2 sertxd (“Value:,”B.5) serrxd (B.0, B.1, B.2, B.3) hsersetup b9600_4, %10 hserout 0,(b.0) hserin 0,50

Code Examples Memory Commands PEEK-POKE READ-WRITE GET-PUT

Editor

Editor Selecting Mode

Editor Selecting Serial Port

Editor Example Text Program

Editor Example Flowchart Program

Editor Example Wizard

Editor Example Syntax Check

Editor Download Program

Editor Simulate a Program

Editor Debug a Program

Editor Terminal Program

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