main
Last change
on this file since 0be09ca was 0be09ca, checked in by Adrien Destugues <pulkomandy@…>, 13 years ago |
- Fix schematic for µSerial : add "local handshake" to make some PCs happy
- Some improvements to the test code.
git-svn-id: svn://pulkomandy.tk/avrstuff@42 c6672c3c-f6b6-47f9-9001-1fd6b12fecbe
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File size:
730 bytes
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1 | #include <avr/io.h>
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2 | #include <avr/interrupt.h>
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3 | #include <avr/wdt.h>
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4 | #include <avr/pgmspace.h>
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5 | #include <util/delay.h>
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6 |
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7 | #include <string.h>
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8 | #include <stdbool.h>
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9 |
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10 | int main() {
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11 | wdt_enable(WDTO_2S);
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12 | // configure timer 0 for a rate of 16M/(256 * 256) = ~244Hz
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13 | TCCR0A = 0; // timer 0 prescaler: 256
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14 | TCCR0B = 4;
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15 |
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16 | //debug LED - output
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17 | DDRD |= 255;
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18 |
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19 | PORTD = 0;
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20 |
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21 | // Serial PORT
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22 | UBRRH = 0;
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23 | UBRRL = 10;
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24 |
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25 | UCSRB = (1<<RXEN) |(1<<TXEN);
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26 | UCSRC = (1 << UCSZ1) | (1 << UCSZ0);
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27 |
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28 | while(1) {
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29 | wdt_reset();
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30 |
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31 |
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32 | // check timer if we need periodic reports
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33 | if (TIFR & (1 << TOV0)) {
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34 | TIFR = (1 << TOV0); // reset flag
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35 | PORTD ^= (1<<PD6);
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36 |
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37 | UDR = 'H';
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38 | }
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39 | }
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40 |
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41 | return 0;
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42 | }
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43 |
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