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BOT120.PMD

BOT120 PICAXE-20X2 MICROBOT

Download Hard Reset

If your Microbot is busy doing something such as waiting for an IR

Remote Control key press it may not notice you are attempting to

perform a new download and the download may subsequently fail.

If this happens it is necessary to perform what is known as a ‘Hard Reset’.

A Hard Reset is performed by turning your Microbot’s power off using

the slide switch on the motherboard, starting the download, and then

turning the power back on. As the Microbot wakes-up it will always check

for a download request and allow the new program to be downloaded,

regardless of the program in memory.

Note that the push button on the motherboard, next to the download

socket, is not a ‘reset’ button. To reset the Microbot it is necessary to turn

the power off and then back on.

PICAXE-20X2 Pin Connections

All circuit board modules are connected via the connector bric; bolting

the bric into place completes the electrical connection from one board to

the other.

There are six positions on the motherboard to which the bric can be

connected. Each position is connected to a particular PICAXE 20X2 pin.

In addition, other PICAXE pins are used on the motherboard to interface

to the motors, LEDs, Piezo Sounder and Push Button.

In order to control your Microbot you need to interact with its hardware

via programming the appropriate PICAXE 20X2 pins.

For example, the left LED of your Microbot is connected to the B.1 pin

and is therefore controlled by sending a ‘high’ command to B.1 to turn

the LED on and sending a ‘low’ command to B.1 to turn it off.

If you were interacting with the Line Tracker module connected to the

front middle position, that connection is C.2 / ADC 8, so you would use

a ‘readadc’ command on analogue channel 8 to read the light intensity

level from that sensor

Note that the ‘Logicator for PICAXE’ flowcharting software uses a slightly

different pin naming system than the BASIC language used by

Programming Editor / AXEpad. Both systems are shown in the tables

overleaf.

As the interaction with the PICAXE 20X2 pins

is so important to programming and

controlling your Microbot you may wish to

print the next page and keep it as a handy

reference.

A.0 / Serial Out

B.0 / ADC1 / hint1

B.1 / ADC2 / hint2 / SRQ

B.2 / ADC4 / C2+

B.3 / ADC5 / C2-

B.4 / ADC6 / hpwm D / C1-

B.5 / ADC10 / hi2c sda / hspi sdi

B.6 / ADC11 / hserin

B.7 / hi2c scl / hspi sck

Serial In

ADC3 / C.7

C.6

hpwm A / pwm C.5 / C.5

hpwm B / SRNQ / C.4

hpwm C / ADC7 / C.3

kb clk / ADC8 / C.2

hspi sdo / kb data / ADC9 / C.1

hserout / C.0

PICAXE-20X2