Simple 5x7 Led Matrix and numeric glyph test

5x7test.cpp

/*
 5x7test.cpp --- led matrix example

 P1.0 - P1.4 .. low to high pins for columns
 P2.0 - P2.6 .. low to high pins for rows

 This example code is in the public domain.
 */

#define F_CPU 16000000

#include <fabooh.h>
#include <fabooh.ipp>
#include <DigitalIO.ipp>

using namespace fabooh;

const uint8_t rowPins[] = { 8, 9, 10, 11, 12, 13, 14 };

void setup() {
    int n = 0;
    for (n = 0; n < 6; ++n) {
        pinMode(n, OUTPUT);
        digitalWrite(n, HIGH);
    }

    for (n = 0; n < 7; ++n) {
        pinMode(rowPins[n], OUTPUT);
        digitalWrite(rowPins[n], LOW);
    }

    P2SEL &= ~(BIT6|BIT7);
}

// 5x7 numeric characters from X11
// note we only have 7 rows per but we pad to 8 so
// the code runs faster

const uint8_t glyphs[] = {
//0030:20505050502000
0x00, 0x2, 0x5, 0x5, 0x5, 0x5, 0x2,0,
//0031:20602020207000
0x0, 0x2, 0x6, 0x2, 0x2, 0x2, 0x7, 0,
//0032:6090102040F000
0x0, 0x6, 0x9, 0x1, 0x2, 0x4, 0xF, 0,
//0033:F0106010906000
0x0, 0xF, 0x1, 0x6, 0x1, 0x9, 0x6, 0,
//0034:2060A0F0202000
0x0, 0x2, 0x6, 0xA, 0xF, 0x2, 0x2, 0,
//0035:F080E010906000
0x0, 0xF, 0x8, 0xE, 0x1, 0x9, 0x6, 0,
//0036:6080E090906000
0x0, 0x6, 0x8, 0xE, 0x9, 0x9, 0x6, 0,
//0037:F0102020404000
0x0, 0xF, 0x1, 0x2, 0x2, 0x4, 0x4, 0,
//0038:60906090906000
0x0, 0x6, 0x9, 0x6, 0x9, 0x9, 0x6, 0,
//0039:60909070106000
0x0, 0x6, 0x9, 0x9, 0x7, 0x1, 0x6, 0,
};

void loop() {
    int n, j;

    int num = 9;
    unsigned long nextTime = millis() + 250;

    while (true) {
        for (n = 0; n < 7; ++n) {
            digitalWrite(rowPins[n], HIGH); // set the LED on
            // toggle the columns values for each row
            // driving the column pin low lets the current flow
            // from the row pin, we have cathode columns and anode rows
            P1OUT &= ~glyphs[ (num * 8) + n ];
            __delay_cycles(32653); // 1/7th /70Hz when running at 16Mhz
            P1OUT |= 0x1F;
            digitalWrite(rowPins[n], LOW); // set the LED on
        }

        // countdown every 250 ms
        if (millis() > nextTime) {
            nextTime = millis() + 250;
            if (--num < 0)
                num = 9;
        }
    }
}