Numero Uno / Mbed 2 deprecated MotorDriver

code to drive the motors to the right position

Dependencies:   HIDScope QEI mbed

Fork of BMT-K9_potmeter_fade by First Last

main.cpp@0:e300738b9507, 2013-09-24 (annotated)

Committer:
vsluiter
Date:
Tue Sep 24 14:50:29 2013 +0000
Revision:
0:e300738b9507
Child:
1:f5b12280ea8a
Initial commit;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
vsluiter 0:e300738b9507 1 #include "mbed.h"
vsluiter 0:e300738b9507 2
vsluiter 0:e300738b9507 3 // myled is an object of class PwmOut. It uses the LED_RED pin
vsluiter 0:e300738b9507 4 // in human speech: myled is an output that can be controlled with PWM. LED_RED is the pin which is connected to the output
vsluiter 0:e300738b9507 5 PwmOut myled(LED_RED);
vsluiter 0:e300738b9507 6
vsluiter 0:e300738b9507 7 // pot is an object of class AnalogIn. It uses the PTB0 pin
vsluiter 0:e300738b9507 8 // in human speech: pot is an analog input. You can read the voltage on pin PTB0
vsluiter 0:e300738b9507 9 AnalogIn pot(PTB0);
vsluiter 0:e300738b9507 10
vsluiter 0:e300738b9507 11
vsluiter 0:e300738b9507 12 //start 'main' function. Should be done once in every C(++) program
vsluiter 0:e300738b9507 13 int main()
vsluiter 0:e300738b9507 14 {
vsluiter 0:e300738b9507 15 //setup some stuff
vsluiter 0:e300738b9507 16 //period of PWM signal is 10kHz. Every 100 microsecond a new PWM period is started
vsluiter 0:e300738b9507 17 myled.period_ms(0.1);
vsluiter 0:e300738b9507 18 //while 1 is unequal to zero. For humans: loop forever
vsluiter 0:e300738b9507 19 while(1) {
vsluiter 0:e300738b9507 20 //Complicated stuff:
vsluiter 0:e300738b9507 21 // pot.read() read the value of pot; this gives a value between 0 and 1 depending on the voltage on pin PTB0
vsluiter 0:e300738b9507 22 // this value is then put in myled.write()
vsluiter 0:e300738b9507 23 // myled.write(x) -> write value x (between 0 and 1) to PwmOut myled. The duty cycle goes from 0% to 100%.
vsluiter 0:e300738b9507 24 //Warning: Because the LED is full on when the output is completely low (0% duty cycle), the led is full on when the potmeter value is zero.
vsluiter 0:e300738b9507 25
vsluiter 0:e300738b9507 26 //The code below could also be written as:
vsluiter 0:e300738b9507 27 //myled = pot;
vsluiter 0:e300738b9507 28 myled.write(pot.read());
vsluiter 0:e300738b9507 29 //wait some time to give the LED output a few PWM cycles. Otherwise a new value is written before the previously set PWM period (of 100microseconds) is finished
vsluiter 0:e300738b9507 30 //This loop executes at roughly 100Hz (1/0.01s)
vsluiter 0:e300738b9507 31 wait(0.01);
vsluiter 0:e300738b9507 32 }
vsluiter 0:e300738b9507 33 }
vsluiter 0:e300738b9507 34