'Egel project
for
MSP430G2553 Launchpad

Willem Ouwerkerk, may 2015

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Hier een opmerking over de Launchpad Explorer

e01
Basic port output

Byte wide output to I/O-port 2 wired with eigth 3mm leds. The eight leds must be placed on the breadboard with anode connected from P2.0 to P2.7 see the documentation of the Launchpad. All the kathodes are connected together and wired to ground using a 100 Ohm resistor. The schematics and the finished project are found in the pictures above this text. The words COUNTER and RUNNER are the user words.

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e02
Basic port input and output

Byte output to I/O port wired with 8 leds and bit input using a switch. This example adds bit input to project 1, the leds stay on the breadboard and the switch S2 on the launchpad board is used as an input. This switch is wired to P1.3. It's action is very straightforward, when pressed the delay time is changed. The user words are also COUNTER and RUNNER .

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e03
Onboard ADC

Analog to digital conversion using the internal AD converter, output to leds The leds of project 1 & 2 stay on the board, now a potentiometer of 4K7 is added.
The center wire has to be connected to P1.7 the other two wires to VCC and ground see also the added schematics & photo. The user words are SHOW-ADC1 and SHOW-ADC2 both using a different way of displaying the measured value.

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e04
RS232 using Bluetooth module

Connecting a wireless Bluetooth module and show received data also on the leds. The leds stay on the board, now a HC06 Bluetooth module is added. One have to solder 4 wires to the HC06 for TX/RX and VCC (3,3V) and ground. Two jumpers need to be removed, the TX and RX jumpers at J3. Connect the power for the HC06 {pin12+13} with Launchpad J6 {VCC+GND}. TX & RX from HC06 {pin1+2} with Launchpad J1 {pin3+4}. For more info see the schematics and the photo's. After typing STARTUP or pressing the reset key all communication goes thru Bluetooth. Take care that you couple the HC06 first! All received characters are displayed on the leds too.

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e05
Analog datalogger

(using the first 3 chapters) Wireless analog datalogger combining the first three chapters to build a first application. An LDR is used as an analog sensor. This sensor is sampled 10 times every second, but only every tenth value is stored. After 20 samples are gathered they are sent back to the receiving device. The user word is DATALOGGER this program will startup after every reset. If you do not want this program to start, you also have to press S2 before pressing reset or connecting the power. More info see schematic and photo's.

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e06
PWM using compare unit

Using timer TA1 as pulsewidth modulator with the output on P2.4. Also an example of bit-I/O using two switches to adjust the dutycycle. The up key is connected to P1.4, the down key to P1.5, see photo and schematics. This example controls the brightness of a medium power led. The PWM freqency is high about 8KHz the resolution too it is 2000 steps. Using the internal MSP430 hardware this is easy. A full software solution would use all available CPU time. The user words are CYCLUS and POWERCONTROL .

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e07
Relais control

Bit input from P1.3 (S2) and bit output to P2.2 to control a relais, also software examples of delayed on and off switching. An relais may be used a switch large currents and high voltages depending on the specs of the relais. Note that the driving transistor and voltage powering the relais may need adaptation too. The user word here is RELAIS-CONTROL . This kind of delay is used at elevator doors for example.

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e08
RC servo controller

Bit output using timer TA0 to control the pulsewidth of 2 model servo's. This example uses a timer interrupt, so it is also an example of the use of (timer)interrupts. P1.4 and P1.5 are wired to the signal line of each servo more info see the schematics and photo. User words: SERVO-ON SERVO-OFF SERVO and the demo MOVE-SERVOS .

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e09
Walking biped

Also needed for this robot: some wood or alu-sheet, 16 cm alu staff material bend as two squares. Finally some double sided sticky tape and some screws and nuts.

Small walking robot with two legs using four servo's, two for each leg. A wireless controlled robot using code from the info from the first eight chapters to build a walking robot. The servo's are connected to P1.4 to P1.7, the TX/RX of the HC06 are wired to P1.1 and P1.2 see also chapter E04!! The user words are: BIPED-ON and BIPED-OFF , WOBBLE , WALK and HELLO . The words: REST , RIGHT-UP , LEFT-UP , RIGHT-FORW , LEFT-FORW , DOWN , WAVE , TOES and REST may be used to build more complex functions. The code is kept very simple, so there is plenty room for improvement!!!

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e10
Unipolar stepper motor

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