70 lines
1.6 KiB
C
70 lines
1.6 KiB
C
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#include <detpic32.h>
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const unsigned int dis7Scodes[] = {0x3F, 0x06, 0x5B, 0x4F, 0x66, 0x6D,
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0xFD, 0x07, 0x7F, 0x6F, 0x77, 0xFC,
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0x39, 0x5E, 0xF9, 0xF1};
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void delay(unsigned int ms) {
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resetCoreTimer();
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while (readCoreTimer() < ms * 20000);
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}
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typedef enum { HIGH, LOW } flag;
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void clearDisplays() {
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LATD = (LATD & 0xFF9F) | 0x0040;
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LATB &= 0x80FF;
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LATD = (LATD & 0xFF9F) | 0x0020;
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LATB &= 0x80FF;
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}
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void send2displays(unsigned char value) {
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static flag f = LOW;
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char high = dis7Scodes[value >> 4];
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char low = dis7Scodes[value & 0x0F];
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if (f == HIGH) {
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LATD = (LATD & 0xFF9F) | 0x0040;
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LATB = (LATB & 0x80FF) | high << 8;
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f = LOW;
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} else {
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LATD = (LATD & 0xFF9F) | 0x0020;
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LATB = (LATB & 0x80FF) | low << 8;
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f = HIGH;
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}
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}
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int main() {
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TRISE &= 0xFFF0;
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TRISD &= 0xFF9F;
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TRISB &= 0x80FF;
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LATE &= 0xFFF0;
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clearDisplays();
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char lastKey;
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while (1) {
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char key = inkey();
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if ('0' <= key && key <= '3') {
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LATE = (LATE & 0xFFF0) | 0x0001 << (key - '0');
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lastKey = key;
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} else if (key != '\0') {
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LATE = (LATE & 0xFFF0) | 0x000F;
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resetCoreTimer();
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while (readCoreTimer() < 20000000)
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send2displays(0xFF);
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LATE &= 0xFFF0;
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clearDisplays();
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lastKey = 0xFF;
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}
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if ('0' <= lastKey && lastKey <= '3') {
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send2displays(lastKey - '0');
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delay(10);
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}
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}
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return 0;
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}
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