1 | #include <stdio.h>
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2 | #include <stdlib.h>
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3 | #include "diag/Trace.h"
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4 | #include "stm32f10x.h"
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5 | #include "cortexm/ExceptionHandlers.h"
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6 |
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7 |
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8 | #define GPIOB_LED GPIO_Pin_2
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9 | #define GPIOC_BZZ GPIO_Pin_13
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10 |
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11 | #define TIMER_FREQUENCY_HZ (1000u)
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12 |
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13 |
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14 | volatile uint32_t timer_delayCount;
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15 |
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16 | void Delay(uint32_t ticks);
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17 | void TimingDelay_Decrement(void);
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18 |
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19 |
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20 | void System_Clock_Setup(void);
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21 |
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22 | #pragma GCC diagnostic push
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23 | #pragma GCC diagnostic ignored "-Wunused-parameter"
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24 | #pragma GCC diagnostic ignored "-Wmissing-declarations"
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25 | #pragma GCC diagnostic ignored "-Wreturn-type"
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26 |
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27 | void System_Clock_Setup(void) {
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28 | RCC_PLLConfig(RCC_PLLSource_HSI_Div2, RCC_PLLMul_12); // 48MHz
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29 | RCC_PLLCmd(ENABLE);
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30 |
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31 | while (RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET) {
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32 | }
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33 | RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
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34 |
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35 | /* Set HCLK, PCLK1, and PCLK2 to SCLK (these are default */
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36 | RCC_HCLKConfig(RCC_SYSCLK_Div1); // 48 MHz
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37 | RCC_PCLK1Config(RCC_HCLK_Div2); // APB1 24MHz, max 36MHz
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38 | RCC_PCLK2Config(RCC_HCLK_Div1); // APB2 48MHz
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39 | RCC_ADCCLKConfig(RCC_PCLK2_Div4); // 48MHz/4 = 12MHz
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40 |
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41 | RCC_ClocksTypeDef clocks;
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42 | RCC_GetClocksFreq(&clocks);
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43 | SysTick_Config(clocks.SYSCLK_Frequency / 100000); //10us
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44 | }
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45 |
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46 | int main(int argc, char* argv[]) {
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47 |
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48 | trace_puts("Hello ARM World!");
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49 |
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50 |
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51 | //SysTick_Config(SystemCoreClock / TIMER_FREQUENCY_HZ);
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52 | System_Clock_Setup();
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53 |
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54 | trace_printf("System clock: %u Hz\n", SystemCoreClock);
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55 |
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56 | // Enable GPIO Peripheral clock
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57 | /* GPIOA GPIOB and GPIOC clock enable */
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58 | RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
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59 | RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
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60 | RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
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61 |
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62 | GPIO_InitTypeDef GPIO_InitStructure;
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63 |
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64 | /* PB2 LED configuration */
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65 | GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
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66 | GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
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67 | GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
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68 | GPIO_Init(GPIOB, &GPIO_InitStructure);
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69 |
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70 | /* PC13 Buzzer configuration */
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71 | GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;
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72 | GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
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73 | GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
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74 | GPIO_Init(GPIOC, &GPIO_InitStructure);
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75 |
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76 | uint32_t seconds = 0;
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77 |
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78 | GPIO_SetBits(GPIOB, GPIOB_LED);
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79 | GPIO_SetBits(GPIOC, GPIOC_BZZ);
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80 | // Infinite loop
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81 | while (1) {
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82 | Delay(100);
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83 |
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84 | GPIOC->ODR ^= GPIOC_BZZ; // Toggle Buzzer
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85 | GPIOB->ODR ^= GPIOB_LED; // Toggle LED
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86 |
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87 | Delay(100);
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88 |
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89 | ++seconds;
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90 |
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91 | // Count seconds on the trace device.
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92 | trace_printf("Second %u\n", seconds);
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93 | }
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94 | }
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95 |
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96 | void Delay(uint32_t ticks) {
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97 | timer_delayCount = ticks;
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98 | while (timer_delayCount != 0u)
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99 | ;
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100 | }
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101 |
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102 | void TimingDelay_Decrement(void) {
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103 | if (timer_delayCount != 0u) {
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104 | --timer_delayCount;
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105 | }
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106 | }
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107 |
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108 | void SysTick_Handler(void) {
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109 | TimingDelay_Decrement();
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110 | }
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111 |
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112 | #pragma GCC diagnostic pop
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