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annotate test/c3examples/burn2.c3 @ 288:a747a45dcd78

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Various styling work
author Windel Bouwman
date Thu, 21 Nov 2013 14:26:13 +0100
parents 1c7c1e619be8
children bd2593de3ff8
rev   line source
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1 /*
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2
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3 This file blinks a LED on the STM32F4 discovery board.
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4
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5 the board has 4 leds on PD12, PD13, PD14 and PD15
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6
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7 */
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8
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9 module burn2;
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11 import stm32f4xx;
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12
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13 function int add(int a, int b)
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14 {
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15 return a + b;
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16 }
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17
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18 function void init(int pin)
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19 {
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20 if (pin < 12)
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21 {
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22 return;
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23 }
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24
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25 if (pin > 15)
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26 {
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27 return;
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28 }
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29
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30 var stm32f4xx.RCC_Type RCC;
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31 RCC = cast<RCC_Type>(0x40023800);
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32
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33 // Enable the clock to port D:
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34 RCC->AHB1ENR = RCC->AHB1ENR | (1 << 3);
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35 // Memory mapped control registers:
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36 var GPIO_Type GPIOD;
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37 GPIOD = cast<GPIO_Type>(0x40020C00);
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38
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39 // PD13 == output (01)
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40 GPIOD->MODER = (1 << (pin << 1));
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41 GPIOD->ODR = (1 << pin);
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42 }
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45 function void main()
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46 {
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47 // Vary between 12 and 15:
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48 init(13);
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49
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50 var int a;
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51 a = 0
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52 while (a < 1000)
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53 {
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54 a = add(a, 1);
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55 }
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56
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57 while(true) {}
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58 }
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