PICAXE 18M2 H-Bridge DC Motor Control

Updated versions of this page:

• PICAXE Operates H-Bridge Motor Controller
• PICAXE Micorcontroller Controls Motor Speed - Direction
• PICAXE Projects

; setfreq m4  ; All M2 parts internal k31, 
; k250, k500, m1, m2, m4, m8,m16,m32
; Use terminal at 9600 at 8 mHz
; if using 4 mHz set terminal 4800

let dirsB = %00001111 ; PB0-PB3 output, PB4-PB7 input
pullup on ; enable pullups PORTB
pullup %11110000 ; pullup B.7 - B.4

let pinsB = pinsB & 0xF0 ; outputs off

symbol SW0 = pinB.5 ; all HIGH when open
symbol SW1 = pinB.6
symbol SW2 = pinB.7

main:
if SW0 = 0 then goto OFF1 ;endif
if SW1 = 0 then goto REV1 ;endif
if SW2 = 0 then goto FOR1 ;endif
goto main


REV1:
let pinsB = pinsB & 0xF0 ; motor off
pause 500
; let pinsB = pinsB | %00000001 ; motor on
high B.0
goto main

FOR1:
let pinsB = pinsB & 0xF0 ; motor off
pause 500
;let pinsB = pinsB | %00000010 ; motor on
high B.1
goto main

OFF1:
let pinsB = pinsB & 0xF0 ; motor off
pause 500
goto main

Picaxe Micro-controller Projects!

The PICAXE series of micro-controllers rank as the easiest and most cost effective way to use Microchip processors. I wanted an easier and less expensive way to introduce my students to the "PIC" micro-controller. Here I hope to get those starting out past poorly written literature and lack of simple working code examples.

• PICAXE Related videos Oct. 2016:
• Tutorial: Programming-Using PICAXE-18M2 Microcontroller
• How to setup PICAXE Pulse Width Modulation
• PICAXE TA8050P H-Bridge with Motor Control
• PICAXE TA8050P H-Bridge with Motor Speed Control
• PICAXE-18M2 Operates MOSFET H-Bridge
• PICAXE-18M2 Uses MCP23016 GPIO Expander

• Solar Panel Charge Controller Using PICAXE Microcontroller
• Exploring the PICAXE Micro-Controller
• Understanding Micro-Controller Input/Output Ports
• Using the 74HC165 Shift Register with the PICAXE Micro-Controller
• Connecting the 74HC595 Shift Register to PICAXE Micro-controller
• Using 7-Segment Displays with the PICAXE Micro-Controller
• Potentiometers and Analog-to-Digital Conversion with the PICAXE
• Pulse-Width Modulation Motor Speed Control and the PICAXE Micro-Controller
• Connecting the PICAXE to the DS1307 Real Time Clock
• Connecting the PICAXE to an External EEPROM (24LC08)
• Connecting a Servo to a PICAXE
• Connecting the TLC548 to the PICAXE
• Connecting the Ad5220 Digital Potentiometer to the PICAXE

See How I got into Electronics