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
|
function cmd_dcmotor_release(h,motor_no)
// Command to release pins which have setup for DC motor
//
// Calling Sequence
// cmd_dcmotor_release(h,motor_no)
//
// Parameters
// h : Board number, reserved for future use. For this version, any number would do
// motor_no : ID in which the motor has been connected
//
// Description
// Arduino board does not deliver enough power, so it is necessary to use a H-bridge circuit/IC to control the motor. There are several types of H-bridge IC that do not all operate on the same principle. For example, the L298 requires the use of a PWM signal with current sense. The L293 uses two PWM to set the speed and direction. Ready-to-use Shields are also available.
//
// Remember that the PWM is 8-bit (0 to 255). The input of the block could accept any value, but it would saturate at +- 255.
//
// Examples
// ok = open_serial(1,9,115200)
// cmd_dcmotor_setup(1,3,1,9,10) // Setup DC motor of type 3 (L293), motor 1, pin 9 and 10
// cmd_dcmotor_run(1,1,255)
// sleep(1000)
// cmd_dcmotor_run(1,1,-255)
// sleep(1000)
// cmd_dcmotor_release(1,1)
// close_serial(1)
// See also
// cmd_dcmotor_setup
// cmd_dcmotor_release
//
// Authors
// Bruno JOFRET, Tan C.L.
//
code_sent="M"+ascii(48+motor_no)+"1"+ascii(0);
write_serial(h,code_sent,4);
code_sent="M"+ascii(48+motor_no)+"r";
write_serial(h,code_sent,3)
endfunction
|
