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ES305 Lab 2 Exercise 3 PWM output to OScope
Dependencies: mbed
main.cpp@0:2da13a76baf2, 2014-08-14 (annotated)
- Committer:
- brianconnett
- Date:
- Thu Aug 14 16:15:16 2014 +0000
- Revision:
- 0:2da13a76baf2
ES305 Lab 2 Exercise 3; Create a PWM signal to be viewed on the OScope
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
brianconnett | 0:2da13a76baf2 | 1 | //**************************************** |
brianconnett | 0:2da13a76baf2 | 2 | // ES305 Linear Control Systems |
brianconnett | 0:2da13a76baf2 | 3 | // Lab 2 - Introduction to mbed microcontroller |
brianconnett | 0:2da13a76baf2 | 4 | // Exercise 3 - Pulse Width Modulation |
brianconnett | 0:2da13a76baf2 | 5 | // Adjusts Pulse Width Modulation output. From Pin22 and displays on attached Oscilloscope |
brianconnett | 0:2da13a76baf2 | 6 | // |
brianconnett | 0:2da13a76baf2 | 7 | // Brian Connett, LCDR, USN |
brianconnett | 0:2da13a76baf2 | 8 | //**************************************** |
brianconnett | 0:2da13a76baf2 | 9 | |
brianconnett | 0:2da13a76baf2 | 10 | #include "mbed.h" //mbed header file from mbed.org includes MOST APIs required to operate LPC |
brianconnett | 0:2da13a76baf2 | 11 | |
brianconnett | 0:2da13a76baf2 | 12 | PwmOut pwm1(p22); //Creates a pulse-width modulation digital output assigned to the variable pwm1 at Pin22 |
brianconnett | 0:2da13a76baf2 | 13 | |
brianconnett | 0:2da13a76baf2 | 14 | int main() |
brianconnett | 0:2da13a76baf2 | 15 | { |
brianconnett | 0:2da13a76baf2 | 16 | |
brianconnett | 0:2da13a76baf2 | 17 | pwm1.period(0.010); //Set PWM period to 10ms |
brianconnett | 0:2da13a76baf2 | 18 | pwm1.period_ms(10); //Set PWM period to 10ms (alternative) |
brianconnett | 0:2da13a76baf2 | 19 | pwm1.period_us(10000); //Set PWM period to 10ms (alternative) |
brianconnett | 0:2da13a76baf2 | 20 | |
brianconnett | 0:2da13a76baf2 | 21 | pwm1.write(0.5); //set duty cycle to 50% |
brianconnett | 0:2da13a76baf2 | 22 | pwm1=0.5; //set duty cycle to 50% (alternative) |
brianconnett | 0:2da13a76baf2 | 23 | |
brianconnett | 0:2da13a76baf2 | 24 | } |