Frazer Legge / Mbed 2 deprecated Assignment_3__Embedded_Software

chad

Dependencies:   MCP23017 WattBob_TextLCD mbed-rtos mbed

main.cpp@17:bc25d5f47bab, 2017-03-13 (annotated)

Committer:
f_legge
Date:
Mon Mar 13 14:51:55 2017 +0000
Revision:
17:bc25d5f47bab
Parent:
16:bebcc7d24f3e
Child:
18:bda795e28ed7
Final Commit. ; All tasks working.; Timing added.; Commented and formatted.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
f_legge 4:70553c83c65a 1 // Paramater Allocation
f_legge 4:70553c83c65a 2 // Paramater: 17
f_legge 4:70553c83c65a 3 // Log Option: 1 (uSD)
f_legge 4:70553c83c65a 4 // Watchdog Pulse Length: 6ms
f_legge 4:70553c83c65a 5 // Watchdog Repetion Rate: 0.5
f_legge 4:70553c83c65a 6 // Error Display: 1 (LCD)
f_legge 16:bebcc7d24f3e 7 // Execution time display: Task5 (LDC display)
f_legge 4:70553c83c65a 8
f_legge 13:ad04937ca366 9 #include "main.h"
f_legge 0:10e3e2697134 10
f_legge 4:70553c83c65a 11 // Pointers to LCD Screen
f_legge 4:70553c83c65a 12 MCP23017 *par_port; // pointer to 16-bit parallel I/O chip
f_legge 4:70553c83c65a 13 WattBob_TextLCD *lcd; // pointer to 2*16 character LCD object
f_legge 13:ad04937ca366 14 FILE *fp; // pointer to uSD object
f_legge 4:70553c83c65a 15
f_legge 16:bebcc7d24f3e 16 SDFileSystem sd(p5, p6, p7, p8, "sd"); //uSD pinout
f_legge 14:ede0e7ed2745 17
f_legge 4:70553c83c65a 18 // Digital I/O p11 to p20
f_legge 16:bebcc7d24f3e 19 DigitalIn Fq(p14); // Digital frequency in for measurement
f_legge 14:ede0e7ed2745 20 DigitalIn DS(p12); // Digital switch input
f_legge 14:ede0e7ed2745 21 DigitalIn DS_s(p13); // Digital shutdown switch
f_legge 17:bc25d5f47bab 22 DigitalOut WD_pulse(p11); // Watchdog Pulse
f_legge 14:ede0e7ed2745 23 DigitalOut led1(LED1);
f_legge 14:ede0e7ed2745 24 DigitalOut led2(LED2);
f_legge 4:70553c83c65a 25
f_legge 4:70553c83c65a 26 // Analogue I/O p15 to p20
f_legge 16:bebcc7d24f3e 27 AnalogIn A1_(p15); // Analogue input to be filtered
f_legge 14:ede0e7ed2745 28 AnalogIn A2_(p16); // Analogue input to be filtered
f_legge 4:70553c83c65a 29
f_legge 4:70553c83c65a 30 // Timer objects
f_legge 17:bc25d5f47bab 31 Ticker ticker; // Ticker for CycExec
f_legge 15:85616bc0e2ae 32 Timer timer; // Frequency Timer
f_legge 15:85616bc0e2ae 33 Timer T5; // Timer for idle states
f_legge 4:70553c83c65a 34
f_legge 4:70553c83c65a 35 // Constant Declaration
f_legge 5:e1ade53bce83 36 const int WD = 6000; // Watchdog pulse length
f_legge 4:70553c83c65a 37
f_legge 4:70553c83c65a 38 // Variable Declaration
f_legge 17:bc25d5f47bab 39 int tck = 0; // Used to define what task is called (CycExec)
f_legge 0:10e3e2697134 40
f_legge 17:bc25d5f47bab 41 float freq; // Frequency read variable
f_legge 4:70553c83c65a 42
f_legge 17:bc25d5f47bab 43 int switch_state; // Output switch 1
f_legge 12:d088f8024cf0 44
f_legge 17:bc25d5f47bab 45 float A1_In; // Analogue 1 Input
f_legge 17:bc25d5f47bab 46 float A2_In; // Analogue 2 Input
f_legge 17:bc25d5f47bab 47 float A1_val; // Analogue 1 return variable (Analogue In)
f_legge 17:bc25d5f47bab 48 float A2_val; // Analogue 2 return variable (Analogue In)
f_legge 10:2414d28be4ba 49
f_legge 17:bc25d5f47bab 50 int error_code; // Error code variable
f_legge 4:70553c83c65a 51
f_legge 17:bc25d5f47bab 52 int logcount; // Keep track of log number
f_legge 4:70553c83c65a 53
f_legge 14:ede0e7ed2745 54
f_legge 14:ede0e7ed2745 55
f_legge 4:70553c83c65a 56 ////////////////////////////////////////////////////////////////////////////////
f_legge 4:70553c83c65a 57 //
f_legge 4:70553c83c65a 58 // Main Program
f_legge 4:70553c83c65a 59 //
f_legge 13:ad04937ca366 60
f_legge 13:ad04937ca366 61 void CycExec()
f_legge 14:ede0e7ed2745 62 {
f_legge 17:bc25d5f47bab 63
f_legge 17:bc25d5f47bab 64 if(tck % 20 == 0) { // Every 1 sec freq
f_legge 17:bc25d5f47bab 65 Task1();
f_legge 17:bc25d5f47bab 66 } else if(tck % 6 == 1) { // Every 1/3 sec Dig In
f_legge 16:bebcc7d24f3e 67 Task2();
f_legge 17:bc25d5f47bab 68 } else if(tck % 40 == 2) { // Every 2 sec WD
f_legge 16:bebcc7d24f3e 69 Task3();
f_legge 17:bc25d5f47bab 70 } else if(tck % 10 == 3) { // Every 1/2 sec Ana In
f_legge 15:85616bc0e2ae 71 Task4();
f_legge 17:bc25d5f47bab 72 } else if(tck % 40 == 4) { // Every 2 sec LCD
f_legge 17:bc25d5f47bab 73 Task5a();
f_legge 17:bc25d5f47bab 74 } else if(tck % 40 == 5) { // Every 1/2 sec LCD
f_legge 17:bc25d5f47bab 75 Task5b();
f_legge 17:bc25d5f47bab 76 } else if(tck % 10 == 6) { // Every 0.5 sec Error
f_legge 17:bc25d5f47bab 77 Task6();
f_legge 17:bc25d5f47bab 78 } else if(tck % 10 == 7) { // Every 1/2 sec Log
f_legge 17:bc25d5f47bab 79 Task7();
f_legge 17:bc25d5f47bab 80 } else if(tck % 10 == 8) { // Every 1/2 sec Shutdown
f_legge 17:bc25d5f47bab 81 Task8();
f_legge 16:bebcc7d24f3e 82 }
f_legge 16:bebcc7d24f3e 83
f_legge 17:bc25d5f47bab 84 led2 = !led2; // Shows CycExec running
f_legge 16:bebcc7d24f3e 85
f_legge 17:bc25d5f47bab 86 tck++; // Increment tck register every cycle. Starts tasks.
f_legge 14:ede0e7ed2745 87 }
f_legge 14:ede0e7ed2745 88
f_legge 4:70553c83c65a 89
f_legge 4:70553c83c65a 90 int main()
f_legge 16:bebcc7d24f3e 91 {
f_legge 4:70553c83c65a 92 // LCD Init
f_legge 4:70553c83c65a 93 par_port = new MCP23017(p9, p10, 0x40); // initialise 16-bit I/O chip
f_legge 14:ede0e7ed2745 94 par_port->config(0x0F00, 0x0F00, 0x0F00);
f_legge 16:bebcc7d24f3e 95
f_legge 4:70553c83c65a 96 lcd = new WattBob_TextLCD(par_port); // initialise 2*26 char display
f_legge 4:70553c83c65a 97 par_port->write_bit(1,BL_BIT); // turn LCD backlight ON
f_legge 16:bebcc7d24f3e 98
f_legge 16:bebcc7d24f3e 99 lcd->cls(); // clear display
f_legge 16:bebcc7d24f3e 100
f_legge 17:bc25d5f47bab 101 // Create .txt file on uSD
f_legge 16:bebcc7d24f3e 102 mkdir("/sd/logs", 0777);
f_legge 17:bc25d5f47bab 103 fp = fopen ("/sd/logs/log.txt", "w"); // Pointer to log file on uSD
f_legge 16:bebcc7d24f3e 104 fprintf(fp, "Log of Frazer Legge's Embedded Software Assignment 2\n\n");
f_legge 17:bc25d5f47bab 105 fprintf(fp, "Log,Frequency,DigitalIn,Analogue1,Analogue2\n\n");
f_legge 16:bebcc7d24f3e 106
f_legge 17:bc25d5f47bab 107 ticker.attach(&CycExec, 0.05); // Period set to 50ms
f_legge 16:bebcc7d24f3e 108
f_legge 17:bc25d5f47bab 109 while(1) { // Indicator to show CycExec was started
f_legge 14:ede0e7ed2745 110 led1 = !led1;
f_legge 16:bebcc7d24f3e 111 wait(0.2);
f_legge 16:bebcc7d24f3e 112 }
f_legge 14:ede0e7ed2745 113 }
f_legge 14:ede0e7ed2745 114
f_legge 14:ede0e7ed2745 115
f_legge 14:ede0e7ed2745 116
f_legge 14:ede0e7ed2745 117