![](/media/cache/group/default_image.jpg.50x50_q85.jpg)
Mail Queue Task
Dependencies: ELEC350-Practicals-FZ429
Fork of Task633-mbedos54 by
main.cpp@13:f05daa68720c, 2017-11-21 (annotated)
- Committer:
- noutram
- Date:
- Tue Nov 21 11:36:41 2017 +0000
- Revision:
- 13:f05daa68720c
- Parent:
- 12:4605f1c51824
- Child:
- 14:03836b560d3d
Fixed
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
noutram | 0:f916cefba2f4 | 1 | #include "mbed.h" |
noutram | 12:4605f1c51824 | 2 | #include "sample_hardware.hpp" |
noutram | 2:70084af839d3 | 3 | #include "string.h" |
noutram | 2:70084af839d3 | 4 | #include <stdio.h> |
noutram | 2:70084af839d3 | 5 | #include <ctype.h> |
noutram | 0:f916cefba2f4 | 6 | |
noutram | 8:c5663f5fa848 | 7 | #define SWITCH1_RELEASE 1 |
noutram | 8:c5663f5fa848 | 8 | |
noutram | 11:ae623ddb2eff | 9 | void thread1(); |
noutram | 11:ae623ddb2eff | 10 | void thread2(); |
noutram | 8:c5663f5fa848 | 11 | void switchISR(); |
noutram | 0:f916cefba2f4 | 12 | |
noutram | 8:c5663f5fa848 | 13 | |
noutram | 8:c5663f5fa848 | 14 | //Threads |
noutram | 13:f05daa68720c | 15 | Thread samplingThread(osPriorityRealtime); |
noutram | 12:4605f1c51824 | 16 | Thread t1; |
noutram | 0:f916cefba2f4 | 17 | |
noutram | 10:3a3d2a571c8f | 18 | //Class type |
noutram | 10:3a3d2a571c8f | 19 | class message_t { |
noutram | 10:3a3d2a571c8f | 20 | public: |
noutram | 13:f05daa68720c | 21 | float adcValue; |
noutram | 10:3a3d2a571c8f | 22 | int sw1State; |
noutram | 10:3a3d2a571c8f | 23 | int sw2State; |
noutram | 10:3a3d2a571c8f | 24 | |
noutram | 10:3a3d2a571c8f | 25 | //Constructor |
noutram | 10:3a3d2a571c8f | 26 | message_t(float f, int s1, int s2) { |
noutram | 10:3a3d2a571c8f | 27 | adcValue = f; |
noutram | 10:3a3d2a571c8f | 28 | sw1State = s1; |
noutram | 10:3a3d2a571c8f | 29 | sw2State = s2; |
noutram | 10:3a3d2a571c8f | 30 | } |
noutram | 10:3a3d2a571c8f | 31 | }; |
noutram | 10:3a3d2a571c8f | 32 | |
noutram | 10:3a3d2a571c8f | 33 | //Memory Pool - with capacity for 16 message_t types |
noutram | 11:ae623ddb2eff | 34 | //MemoryPool<message_t, 16> mpool; |
noutram | 0:f916cefba2f4 | 35 | |
noutram | 10:3a3d2a571c8f | 36 | //Message queue - matched to the memory pool |
noutram | 11:ae623ddb2eff | 37 | //Queue<message_t, 16> queue; |
noutram | 11:ae623ddb2eff | 38 | |
noutram | 11:ae623ddb2eff | 39 | //Mail queue |
noutram | 11:ae623ddb2eff | 40 | Mail<message_t, 16> mail_box; |
noutram | 11:ae623ddb2eff | 41 | |
noutram | 8:c5663f5fa848 | 42 | |
noutram | 9:31031bbb59c7 | 43 | // Call this on precise intervals |
noutram | 9:31031bbb59c7 | 44 | void adcISR() { |
noutram | 13:f05daa68720c | 45 | //This is going to be brief |
noutram | 13:f05daa68720c | 46 | samplingThread.signal_set(1); |
noutram | 13:f05daa68720c | 47 | } |
noutram | 13:f05daa68720c | 48 | void doSample() { |
noutram | 10:3a3d2a571c8f | 49 | |
noutram | 13:f05daa68720c | 50 | while (true) { |
noutram | 13:f05daa68720c | 51 | //Waiting for ISR in WAITING state |
noutram | 13:f05daa68720c | 52 | Thread::signal_wait(1); |
noutram | 13:f05daa68720c | 53 | |
noutram | 13:f05daa68720c | 54 | //Read sample - make a copy |
noutram | 13:f05daa68720c | 55 | float sample = adcIn; |
noutram | 13:f05daa68720c | 56 | //Grab switch state |
noutram | 13:f05daa68720c | 57 | uint32_t switch1State = SW1; |
noutram | 13:f05daa68720c | 58 | uint32_t switch2State = SW2; |
noutram | 13:f05daa68720c | 59 | |
noutram | 13:f05daa68720c | 60 | //Allocate a block from the memory pool |
noutram | 13:f05daa68720c | 61 | message_t *message = mail_box.alloc(); |
noutram | 13:f05daa68720c | 62 | if (message == NULL) { |
noutram | 13:f05daa68720c | 63 | //Out of memory |
noutram | 13:f05daa68720c | 64 | printf("Out of memory\n\r"); |
noutram | 13:f05daa68720c | 65 | redLED = 1; |
noutram | 13:f05daa68720c | 66 | return; |
noutram | 13:f05daa68720c | 67 | } |
noutram | 13:f05daa68720c | 68 | |
noutram | 13:f05daa68720c | 69 | //Fill in the data |
noutram | 13:f05daa68720c | 70 | message->adcValue = sample; |
noutram | 13:f05daa68720c | 71 | message->sw1State = switch1State; |
noutram | 13:f05daa68720c | 72 | message->sw2State = switch2State; |
noutram | 13:f05daa68720c | 73 | |
noutram | 13:f05daa68720c | 74 | //Write to queue |
noutram | 13:f05daa68720c | 75 | osStatus stat = mail_box.put(message); //Note we are sending the "pointer" |
noutram | 13:f05daa68720c | 76 | |
noutram | 13:f05daa68720c | 77 | //Check if succesful |
noutram | 13:f05daa68720c | 78 | if (stat == osErrorResource) { |
noutram | 13:f05daa68720c | 79 | redLED = 1; |
noutram | 13:f05daa68720c | 80 | printf("queue->put() Error code: %4Xh, Resource not available\r\n", stat); |
noutram | 13:f05daa68720c | 81 | mail_box.free(message); |
noutram | 13:f05daa68720c | 82 | return; |
noutram | 13:f05daa68720c | 83 | } |
noutram | 13:f05daa68720c | 84 | |
noutram | 13:f05daa68720c | 85 | } //end whie |
noutram | 8:c5663f5fa848 | 86 | } |
noutram | 8:c5663f5fa848 | 87 | |
noutram | 9:31031bbb59c7 | 88 | //Normal priority thread (consumer) |
noutram | 11:ae623ddb2eff | 89 | void thread1() |
noutram | 10:3a3d2a571c8f | 90 | { |
noutram | 4:dae8898e55fe | 91 | while (true) { |
noutram | 10:3a3d2a571c8f | 92 | //Block on the queue |
noutram | 11:ae623ddb2eff | 93 | osEvent evt = mail_box.get(); |
noutram | 9:31031bbb59c7 | 94 | |
noutram | 10:3a3d2a571c8f | 95 | //Check status |
noutram | 11:ae623ddb2eff | 96 | if (evt.status == osEventMail) { |
noutram | 10:3a3d2a571c8f | 97 | message_t *pMessage = (message_t*)evt.value.p; //This is the pointer (address) |
noutram | 10:3a3d2a571c8f | 98 | //Make a copy |
noutram | 10:3a3d2a571c8f | 99 | message_t msg(pMessage->adcValue, pMessage->sw1State, pMessage->sw2State); |
noutram | 10:3a3d2a571c8f | 100 | //We are done with this, so give back the memory to the pool |
noutram | 11:ae623ddb2eff | 101 | mail_box.free(pMessage); |
noutram | 10:3a3d2a571c8f | 102 | |
noutram | 10:3a3d2a571c8f | 103 | //Echo to the terminal |
noutram | 10:3a3d2a571c8f | 104 | printf("ADC Value: %.2f\t", msg.adcValue); |
noutram | 10:3a3d2a571c8f | 105 | printf("SW1: %u\t", msg.sw1State); |
noutram | 10:3a3d2a571c8f | 106 | printf("SW2: %u\n\r", msg.sw2State); |
noutram | 11:ae623ddb2eff | 107 | } else { |
noutram | 11:ae623ddb2eff | 108 | printf("ERROR: %x\n\r", evt.status); |
noutram | 11:ae623ddb2eff | 109 | } |
noutram | 11:ae623ddb2eff | 110 | |
noutram | 9:31031bbb59c7 | 111 | } //end while |
noutram | 0:f916cefba2f4 | 112 | } |
noutram | 0:f916cefba2f4 | 113 | |
noutram | 4:dae8898e55fe | 114 | |
noutram | 8:c5663f5fa848 | 115 | // Main thread |
noutram | 0:f916cefba2f4 | 116 | int main() { |
noutram | 12:4605f1c51824 | 117 | //Power on self-test |
noutram | 12:4605f1c51824 | 118 | post(); |
noutram | 8:c5663f5fa848 | 119 | |
noutram | 9:31031bbb59c7 | 120 | //Start message |
noutram | 10:3a3d2a571c8f | 121 | printf("Welcome\n"); |
noutram | 10:3a3d2a571c8f | 122 | |
noutram | 9:31031bbb59c7 | 123 | //Hook up timer interrupt |
noutram | 9:31031bbb59c7 | 124 | Ticker timer; |
noutram | 10:3a3d2a571c8f | 125 | timer.attach(&adcISR, 0.1); |
noutram | 9:31031bbb59c7 | 126 | |
noutram | 8:c5663f5fa848 | 127 | //Threads |
noutram | 13:f05daa68720c | 128 | samplingThread.start(doSample); //High Priority |
noutram | 12:4605f1c51824 | 129 | t1.start(thread1); |
noutram | 7:cd015e83995a | 130 | |
noutram | 9:31031bbb59c7 | 131 | printf("Main Thread\n"); |
noutram | 2:70084af839d3 | 132 | while (true) { |
noutram | 9:31031bbb59c7 | 133 | Thread::wait(5000); |
noutram | 9:31031bbb59c7 | 134 | puts("Main Thread Alive"); |
noutram | 0:f916cefba2f4 | 135 | } |
noutram | 0:f916cefba2f4 | 136 | } |
noutram | 2:70084af839d3 | 137 | |
noutram | 2:70084af839d3 | 138 |