Revision 1:42a135eee439, committed 2022-03-02

Comitter:

RogerJKelly

Date:

Wed Mar 02 21:58:48 2022 +0000

Parent:

0:376d7a150177

Commit message:

PWM test code

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mRotaryEncoder.lib	Wed Mar 02 21:58:48 2022 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/charly/code/mRotaryEncoder/#2502b829d452

--- a/main.cpp	Wed Dec 03 03:48:48 2014 +0000
+++ b/main.cpp	Wed Mar 02 21:58:48 2022 +0000
@@ -1,20 +1,124 @@
 #include "mbed.h"
 #include "TextLCD.h"
-//Incluye resistencias de 2.2K en los pines de i2c a 3.3
+#include "mRotaryEncoder.h"
+ 
+DigitalOut fan_enable(PA_8); // high to enable fan, low to turn off
+PwmOut fan_pwm(PB_15);    //D9 D13);
+// I2C Communication
+I2C i2c_lcd(PB_7,PB_6); // SDA, SCL
+ 
+TextLCD_I2C lcd(&i2c_lcd, 0x4E, TextLCD::LCD16x2, TextLCD::HD44780); // I2C bus, PCF8574 Slaveaddress, LCD Type, Device Type 
+
+// Here's the encoder object
+//mRotaryEncoder enc(D7,D8, D2,PullNone);
+//RPG rpg1(PA_3,PA_4,PA_7); //Set up RPG   
+//mRotaryEncoder enc(PA_3,PA_4,PA_7,PullUp);
+mRotaryEncoder enc(PB_12,PB_13,PB_14,PullUp);
+
+float fan_speed = 0.00;
+float fan_speed_old = 0.00;
+int fan_pwr=0;  //
+char buffer[20];
  
 
+// LCD print helper
+void lcd_printS(int line, int col, char text[])
+{
+    lcd.locate(col, line);       //locate(int column, int row);
+    lcd.printf(text);
+    //for (i=0;i<strlen(text);i++) 
+    //    printC(text[i]);
+}
 
-// I2C Communication
-I2C i2c_lcd(p28,p27); // SDA, SCL
- 
-TextLCD_I2C lcd(&i2c_lcd, 0x4E, TextLCD::LCD16x2, TextLCD::HD44780); // I2C bus, PCF8574 Slaveaddress, LCD Type, Device Type 
+// Helper function to set the PWM values
+void setfanspeed()
+{
+    //if (fan_pwr>0) fan_pwm.write(fan_speed);
+    fan_pwm.write(fan_speed);
+    //fan_pwm.write(1.00 - fan_speed);
+}
+
+// Library calls here when you go clockwise
+void cw()
+{
+// modify the selected RGB component    
+    if (fan_pwr>0)
+    {
+        fan_speed +=0.010;
+        if (fan_speed>0.95) fan_speed=0.950;
+    }
+    setfanspeed();
+}
+
+// Library calls here when you go anticlockwise
+void ccw()
+{
+// modify the selected RGB component    
+   if (fan_pwr>0) 
+   {
+        fan_speed -=0.010;
+        if (fan_speed<0.05) fan_speed=0.050;
+   }
+   setfanspeed();
+}
+
+// Library calls here when you push in on the encoder shaft
+void btn()
+{
+    // change selected component (0, 1, 2)
+    if (++fan_pwr>1)
+    {
+         fan_enable = 0;     // turn fan OFF
+         fan_pwr=0;
+         fan_speed_old = fan_speed;
+         fan_speed = 0.00;         
+    }
+    else
+    {
+       fan_enable = 1;     // turn fan ON
+       fan_speed = fan_speed_old; 
+    }
+    setfanspeed();
+}
+
 
 
 int main() 
 {
-lcd.setMode(TextLCD::DispOn); //DispOff, DispOn
-lcd.setBacklight(TextLCD::LightOff);//LightOff, LightOn
-lcd.setCursor(TextLCD::CurOff_BlkOff);//CurOff_BlkOff, CurOn_BlkOff, CurOff_BlkOn, CurOn_BlkOn
-lcd.printf("Oscar de Jesus \n Vasquez");
+    fan_enable = 0;     // turn fan off
+    //fan_pwm.period(0.01); // setup PWM in seconds. 0.01 == 100hz
+    //fan_pwm.period_ms(100); // setup PWM in milli seconds. 1 == 1 khz
+    // Note: the PWM using the 555 supplied by RIXENS runs around 200khz
+    // - running the pwm at 100khz looses resolution at the top and bottom.
+    // - running the pwm at 10khz has much more accuracy and resolution.
+    // - running the pwm at 20khz has same accuracy and resolution as 10khz.
+    fan_pwm.period_us(100); // setup PWM in micro seconds. 100 == 10khz, 50 == 20khz,10 == 100khz, 5 == 200khz,
+    
+    setfanspeed();
+    // Set up encoder callbacks
+    enc.attachROTCW(cw);
+    enc.attachROTCCW(ccw);
+    enc.attachSW(btn);   
+       
+    lcd.setMode(TextLCD::DispOn); //DispOff, DispOn
+    lcd.setBacklight(TextLCD::LightOff);//LightOff, LightOn
+    lcd.setCursor(TextLCD::CurOff_BlkOff);//CurOff_BlkOff, CurOn_BlkOff, CurOff_BlkOn, CurOn_BlkOn
+    //lcd.printf("Testing I2C LCD");
+    //lcd.locate(0, 1);       //locate(int column, int row);
+    //lcd.printf("does it work");
+    //lcd.setBacklight(TextLCD::LightOn);//LightOff, LightOn
+       
+    lcd.cls();
+    lcd_printS(0,0,"Fan Setting:");
+    lcd_printS(1,0,"Fan Speed: ");
  
- }
\ No newline at end of file
+    while (true)   // nothing else to do but wait
+    {  
+        wait(0.25);    
+        if (fan_pwr>0) lcd_printS(0,12," ON ");
+        else lcd_printS(0,12," OFF");
+        sprintf(buffer,"%3d", (int)(fan_speed * 100));
+        lcd_printS(1,12,buffer);  
+        //LCD.printS(1, 0, buffer);   
+    }
+}
\ No newline at end of file