main.cpp

00001 #include "mbed.h"
00002 #include "rtos.h"
00003 #include "ShiftOut.h" // Ollie Milton, https://os.mbed.com/users/ollie8/code/ShiftOut/
00004 
00005 DigitalOut buzzer(D3);
00006 Serial pc(USBTX,USBRX);     //UART via ST-Link
00007 
00008 typedef uint32_t message_t;
00009 Queue <message_t, 4> queue;
00010 
00011 void display_thread(void const *argument)
00012 {
00013     ShiftOut display(D7, D8, D4);   // clk=D7, data=D8, latch=D4, 16)
00014     uint8_t segment_data[4] = {0xFF, 0xFF, 0xFF, 0xFF}; // A frissítendő szegmenskép
00015     /* Számjegyek (0 – 9) szegmensképe, negatív logikával */
00016     const uint8_t SEGMENT_MAP[]= {0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90};
00017     /* Számjegy (1 - 4) kiválasztó jelek */
00018     const uint8_t SEGMENT_SELECT[] = {0x01, 0x02, 0x04, 0x08};
00019     uint8_t i, idx = 0;
00020     while (true) {
00021         osEvent evt = queue.get(0);                  // Check for a message without waiting
00022         switch(evt.status) {
00023             case osEventMessage:
00024                 printf("osEventMessage = %#05x\n",evt.value.v);  //message arrived
00025                 int n = evt.value.v;
00026                 segment_data[0] = SEGMENT_MAP[(n/1000) %10];
00027                 segment_data[1] = SEGMENT_MAP[(n/100) % 10];
00028                 segment_data[2] = SEGMENT_MAP[(n/10) % 10];
00029                 segment_data[3] = SEGMENT_MAP[n % 10];
00030                 break;
00031             case osOK:
00032 //---           pc.printf("osOK\n");                            //no error, no message arrived
00033                 i = idx++ & 0x03;
00034                 display.write(segment_data[i]);
00035                 display.write(SEGMENT_SELECT[i]);
00036                 break;
00037             case osEventTimeout:
00038                 pc.printf("osEventTimeout\n");                  //timeout occurred
00039                 break;
00040             case osErrorParameter:
00041                 pc.printf("osErrorParameter\n");
00042                 break;                                          //invalid parameter or is out of range.
00043             default:
00044                 pc.printf("Unknown error flag: %#08x\n",(uint32_t)evt.status);
00045                 break;
00046         };
00047         Thread::wait(2);
00048     }
00049 }
00050 
00051 int main (void)
00052 {
00053     uint16_t raw;
00054     Thread thread2(display_thread);
00055     pc.baud(115200);
00056     buzzer = true;
00057     while (true) {
00058         Thread::wait(1000);
00059         raw++;
00060         queue.put((message_t*)raw);
00061     }
00062 }