Yves Roy / Mbed 2 deprecated Nucleo_sg90_DS18S20_control

Software that allows basic remote control of the position of a servo (schematic included in the comments)

Dependencies:   MyDS1820 mbed

Fork of Nucleo_sg90_remote_control by YP Roy

main.cpp@6:6e9120cf5640, 2017-03-24 (annotated)

Committer:
YROY2004
Date:
Fri Mar 24 18:14:46 2017 +0000
Revision:
6:6e9120cf5640
Parent:
5:78a94312c383
Child:
7:db4f43c3ae10
Software that allows control of the position of a sg90 servo using the user button and reading of the ambiant temperature using a 1-wire DS18S20 (based on the DS1820 librairy available on the web: only 3 lines modified)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
YROY2004 5:78a94312c383 1 //247-426-Nucleo_Lab_8
YROY2004 5:78a94312c383 2 //This software is derived from Nucleo_sg90_remote_control.
YPROY 1:df2cee74ab8b 3 //It outputs a PWM signal that is compatible with Tower Pro SG90 servos.
YROY2004 5:78a94312c383 4 //It makes the servo move according to the temperature read from a DS1820
YROY2004 5:78a94312c383 5 //temperature sensor.
YROY2004 5:78a94312c383 6 //Pressing the user button makes the software define the temperature it then
YROY2004 5:78a94312c383 7 //reads as a reference temperature that is associated to the middle position
YROY2004 5:78a94312c383 8 //that can be taken by the sg90 servo. An increase in temperature relative to
YROY2004 5:78a94312c383 9 //this reference temperature will then make the servo rotate in one direction
YROY2004 5:78a94312c383 10 //whereas a decrease with respect to the reference will rather make it rotate in
YROY2004 5:78a94312c383 11 //the other direction.
YROY2004 5:78a94312c383 12 //
YPROY 1:df2cee74ab8b 13
YPROY 1:df2cee74ab8b 14 //Just connect the brown wire of a SG90 servo to GND, its red wire to AVDD and
YPROY 2:7aacbdf39425 15 //its the orange wire to D11 to have the SMT32-F401RE control the servo.
YPROY 4:85a8391945b2 16 //
YPROY 4:85a8391945b2 17 //
YPROY 4:85a8391945b2 18 //material:
YROY2004 5:78a94312c383 19 // DS18S20: temperature sensor
YPROY 4:85a8391945b2 20 //
YPROY 4:85a8391945b2 21 //signals:
YPROY 4:85a8391945b2 22 // D11= pwm signal to use to control SG90 directly
YROY2004 5:78a94312c383 23 // D8= used to communicate with the 1-wire temperature sensor Ds18s20
YPROY 4:85a8391945b2 24 //
YROY2004 5:78a94312c383 25 // Circuit:
YPROY 4:85a8391945b2 26 // _____
YROY2004 5:78a94312c383 27 // | | DS18S20
YROY2004 5:78a94312c383 28 // -----(front view)
YROY2004 5:78a94312c383 29 // | | |
YROY2004 5:78a94312c383 30 // GND___| | |+5V
YROY2004 5:78a94312c383 31 // Orange wire of servo SG90 --D11 |
YROY2004 5:78a94312c383 32 // Red wire of servo SG90 -----+5V D8_______|-/\/\/\--+5v
YROY2004 5:78a94312c383 33 // Brown wire of servo SG90 ---GND 10k
YROY2004 5:78a94312c383 34 //
YROY2004 5:78a94312c383 35 // Hyperterminal configuration
YROY2004 5:78a94312c383 36 // 9600 bauds, 8-bit data, no parity
YPROY 0:7a91558f8c41 37
YROY2004 5:78a94312c383 38
YROY2004 5:78a94312c383 39
YROY2004 5:78a94312c383 40 #include "DS1820.h"
YPROY 1:df2cee74ab8b 41 #include "mbed.h"
YPROY 1:df2cee74ab8b 42 #define NUMBER_OF_POSITIONS sizeof(pulseDurationInMicroSeconds)/sizeof(int)
YPROY 4:85a8391945b2 43 #define PWM_PERIOD_FOR_SG90_IN_MS 20
YPROY 4:85a8391945b2 44 #define PWM_PERIOD_FOR_MODULATION_IN_US 25
YROY2004 5:78a94312c383 45
YROY2004 5:78a94312c383 46
YROY2004 5:78a94312c383 47 Serial pc(SERIAL_TX, SERIAL_RX);
YROY2004 5:78a94312c383 48 DS1820 probe(D8);
YROY2004 5:78a94312c383 49
YROY2004 5:78a94312c383 50 PwmOut led(LED1);
YPROY 1:df2cee74ab8b 51 DigitalOut userLED(LED1);
YROY2004 5:78a94312c383 52
YPROY 2:7aacbdf39425 53 PwmOut towerProSG90(D11);
YPROY 1:df2cee74ab8b 54 InterruptIn userButton(USER_BUTTON);
YPROY 1:df2cee74ab8b 55 int index;
YPROY 3:91070e0c0431 56 int pulseDurationInMicroSeconds[]=
YPROY 4:85a8391945b2 57 {1500,1625,1750,1875,2000, 1875,1750,1625,1500,1375,1250,1125,1000,1125,1250,1375};
YPROY 1:df2cee74ab8b 58 void responseToUserButtonPressed(void)
YPROY 0:7a91558f8c41 59 {
YPROY 1:df2cee74ab8b 60 index++;
YPROY 1:df2cee74ab8b 61 if (index >= NUMBER_OF_POSITIONS)
YPROY 0:7a91558f8c41 62 {
YPROY 1:df2cee74ab8b 63 index = 0;
YPROY 0:7a91558f8c41 64 }
YPROY 1:df2cee74ab8b 65 towerProSG90.pulsewidth_us(pulseDurationInMicroSeconds[index]);
YPROY 0:7a91558f8c41 66 }
YPROY 0:7a91558f8c41 67
YPROY 1:df2cee74ab8b 68 int main()
YPROY 1:df2cee74ab8b 69 {
YPROY 1:df2cee74ab8b 70 index = 0;
YPROY 1:df2cee74ab8b 71 towerProSG90.period_ms(PWM_PERIOD_FOR_SG90_IN_MS);
YPROY 1:df2cee74ab8b 72 towerProSG90.pulsewidth_us(pulseDurationInMicroSeconds[index]);
YPROY 1:df2cee74ab8b 73 userButton.fall(&responseToUserButtonPressed);
YROY2004 5:78a94312c383 74
YROY2004 5:78a94312c383 75 userLED = 1;
YPROY 1:df2cee74ab8b 76 while(1)
YPROY 1:df2cee74ab8b 77 {
YPROY 1:df2cee74ab8b 78 userLED = !userLED;
YROY2004 5:78a94312c383 79
YROY2004 6:6e9120cf5640 80 probe.convertTemperature(true, DS1820::all_devices); //Start temperature conversion, wait until ready
YROY2004 5:78a94312c383 81 printf("Il fait: %3.1foC\r\n", probe.temperature());
YROY2004 5:78a94312c383 82 wait(1.25);
YPROY 0:7a91558f8c41 83 }
YPROY 0:7a91558f8c41 84 }