Important changes to repositories hosted on mbed.com
Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.
To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.
It is also possible to export all your personal repositories from the account settings page.
Dependencies: PID QEI SB1602E mbed-rtos mbed
Fork of
PreHeater
by 
Kazu Zamasu
Revision 0:b1d44d6f9adf, committed 2015-06-13
- Comitter:
- kazu_zamasu
- Date:
- Sat Jun 13 00:05:45 2015 +0000
- Child:
- 1:f974481c37b6
- Commit message:
- ?????
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/PID.lib Sat Jun 13 00:05:45 2015 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/aberk/code/PID/#6e12a3e5af19
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/QEI.lib Sat Jun 13 00:05:45 2015 +0000 @@ -0,0 +1,1 @@ +http://developer.mbed.org/users/aberk/code/QEI/#5c2ad81551aa
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Sat Jun 13 00:05:45 2015 +0000
@@ -0,0 +1,87 @@
+#include "mbed.h"
+#include "PID.h"
+#include "QEI.h"
+#include "rtos.h"
+#include "math.h"
+
+#define ROTATE_PER_REVOLUTIONS 24 //QEI 1 rotate by count
+#define THR 560 /PTH pull up register value
+#define THB 3380 //PTH B number
+#define THCR 10000 //25C PTH register
+#define OV_LL 0.0 //PID calcurate output value 0.0 = 0%
+#define OV_HL 1.0 //PID calcurate output value 1.0 = 100%
+#define SV_LL 0.0 //PID setpoint % value for lo limit
+#define SV_HL 100.0 //PID setpoint % value for high limit
+#define P 1.0
+#define I 0.2
+#define D 0.1
+#define RATE 0.1
+#define Bias 0.2
+#define InitialSP 50.0 // PID initial setpoint
+#define RangeSPL 30.0
+#define RangeSPH 120.0
+
+//Kc, Ti, Td, interval
+PID TIC(P, I, D, RATE);
+
+AnalogIn THAI(dp4);
+PwmOut out(dp1);
+DigitalOut led1(dp14),led2(dp28);
+DigitalIn Run(dp17,PullUp);
+QEI wheel(dp11, PullUp, dp13,PullUp, NC, ROTATE_PER_REVOLUTIONS, QEI::X2_ENCODING);
+float temp_sv_input;
+double temp_pv,temp_cal;
+
+void LCD_thread(void const *args) {
+ while (true) {
+ led2 = !led2;
+ Thread::wait(1000);
+ }
+}
+
+
+int main(){
+ //input for change to 0 to 100% range by 50C to 120C
+ temp_sv_input = wheel.getPulses() * 0.5 + RangeSPL;
+
+ if (temp_sv_input <= RangeSPL){
+ temp_sv_input = RangeSPL;
+ }
+ else if (temp_sv_input >= RangeSPH){
+ temp_sv_input = RangeSPH;
+ }
+
+
+ temp_cal = THAI.read();
+//six order polynomial
+ temp_pv =-0.7964*pow(temp_cal,6.0) - 2.5431*pow(temp_cal,5.0) +63.605*pow(temp_cal,4.0) - 274.1*pow(temp_cal,3.0) + 522.57*pow(temp_cal,2.0) - 539.26*temp_cal + 405.76;
+
+ //Analog input from 50.0C to 120.0C
+ TIC.setInputLimits(SV_LL, SV_HL);
+ //Pwm output from 0.0 to 1.0
+ TIC.setOutputLimits(OV_LL, OV_HL);
+ //If there's a bias.
+ TIC.setBias(Bias);
+ TIC.setMode(Run);
+ //We want the process variable to be 1.7V
+ TIC.setSetPoint(temp_sv_input);
+
+ while(Run == 1){
+ //Update the process variable.
+ TIC.setProcessValue(temp_cal);
+ //Set the new output.
+ out = TIC.compute();
+ //Wait for another loop calculation.
+ wait(RATE);
+
+ Thread thread(LCD_thread);
+
+/* while (true) {
+ led1 = !led1;
+ Thread::wait(500);
+ } */
+
+out = OV_LL;
+ }
+
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-rtos.lib Sat Jun 13 00:05:45 2015 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed-rtos/#ed4ff3bea947
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Sat Jun 13 00:05:45 2015 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/7cff1c4259d7 \ No newline at end of file