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Add Arduino compatibility layer

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We can now directly compile arduino sketches (.pde) files.
Arduino compatible analogWrite works now.
But there is still a long way to go, serial I/O and timer stuff (delay,
millis etc) currently don't work (not tested but I don't expect this to
work).
It can be used in an arduino sketch or in a normal contiki program.
We get a PWM frequency of 490.2 Hz (a period of 2.040 ms), that's
Arduino compatible. If you need different frequencies see native timer
usage in examples/osd/pwm-example
In a contiki program you have to call arduino_pwm_timer_init to
initialize the timer before pwm works. The arduino sketch wrapper
already does this.
For running a sketch, see examples/osd/arduino-sketch
This commit is contained in:
Ralf Schlatterbeck 2014-06-26 11:00:01 +02:00
parent b17934c491
commit b6be226e69
22 changed files with 999 additions and 361 deletions
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2
cpu/avr/hw_timer.h
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@ -137,6 +137,8 @@
#define HWT_CHANNEL_A 0
#define HWT_CHANNEL_B 1
#define HWT_CHANNEL_C 2
#define HWT_CHANNEL_D 3
#define HWT_CHANNEL_MASK 3
/* The following macros are defined for timer values 1,3,4,5 */
#define HWT_ICR(t) \