1
2 #include <stdint.h>
3
4 #include "bsp-fifisdr.h"
5
6 #include "lpclib.h"
7 #include "task-gui.h"
8
9
10 #define GUI_QUEUE_LENGTH (4)
11
12
13 typedef struct {
14 uint8_t opcode;
15 } GUI_Message;
16
17
18 /** Message opcodes for GUI task. */
19 enum {
20 GUI_OPCODE_LED_TICK,
21 };
22
23
24 /** Identifiers for OS timers. */
25 enum {
26 GUI_TIMERMAGIC_LED,
27 };
28
29
30 /** Local task context. */
31 static struct {
32 osMailQId queue;
33 osTimerId ledTick;
34 int led;
35 } gui;
36
37
38
39 static void GUI_osalCallback (void const *pArgument)
40 {
41 (void) pArgument;
42
43 if (gui.queue == NULL) {
44 return;
45 }
46
47 GUI_Message *pMessage = osMailAlloc(gui.queue, 0);
48
49 if (pMessage == NULL) {
50 return;
51 }
52
53 pMessage->opcode = GUI_OPCODE_LED_TICK;
54 osMailPut(gui.queue, pMessage);
55 }
56
57
58 osMailQDef(guiQueue, GUI_QUEUE_LENGTH, GUI_Message);
59 osTimerDef(led, GUI_osalCallback);
60
61 void GUI_task (const void *pArgs)
62 {
63 (void) pArgs;
64 GUI_Message *pMessage;
65 osEvent event;
66
67
68 gui.queue = osMailCreate(osMailQ(guiQueue), NULL);
69
70 gui.ledTick = osTimerCreate(osTimer(led), osTimerPeriodic, (void *)GUI_TIMERMAGIC_LED);
71 osTimerStart(gui.ledTick, 500);
72
73 while (1) {
74 /* Is there a new message? */
75 event = osMailGet(gui.queue, osWaitForever);
76 if (event.status == osEventMail) {
77 pMessage = (GUI_Message *)event.value.p;
78 switch (pMessage->opcode) {
79 case GUI_OPCODE_LED_TICK:
80 gui.led = gui.led ^ 1;
81 BSP_setLed(gui.led);
82 break;
83 }
84
85 osMailFree(gui.queue, pMessage);
86 }
87 }
88 }
