1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
|
function cmd_analog_out_volt(h,pin_no,val)
// Command to sent out analog signal to a connected Arduino board
//
// Calling Sequence
// cmd_analog_out_volt(h,pin_no)
//
// Parameters
// h : Board number, reserved for future use. For this version, any number would do
// pin_no : Digital pin with ~ to sent the signal
// val : The value in volt (0-5) to be sent to the digital pins with ~ sign.
//
// Description
// The analog outputs of the Arduino Uno is available at the pins 3,5,6,9,10 and 11, while on the Mega board, the outputs are on pins 1-13 and 44-46.
// It is a bit misleading to use the term "analog output", because in order to generate this output while minimizing energy losses,
// the Arduino uses PWM (Pulse Width Modulation) available on these ports. By varying the duty cycle of the PWM is altered the average
// voltage across the component connected to this port, which has the effect of having a analog output voltage.
//
// Examples
// ok = open_serial(1,9,115200)
// cmd_analog_out_volt(1,9,100)
// close_serial(1)
//
// See also
// cmd_analog_out
// cmd_arduino_a_control
//
// Authors
// Bruno JOFRET, Tan C.L.
//
if val > 5 then
val = 5;
elseif val < 0
val = 0;
end
val = val .* 255 ./ 5;
code_sent="W"+ascii(48+pin_no)+ascii(abs(ceil(val)));
write_serial(h,code_sent,3);
endfunction
|
