1 | /* Includes ------------------------------------------------------------------*/
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2 | #include "main.h"
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3 | #include "stm32f4xx_hal.h"
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4 |
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5 | /* Private variables ---------------------------------------------------------*/
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6 | UART_HandleTypeDef huart1;
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7 |
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8 | /* Private variables ---------------------------------------------------------*/
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9 | uint8_t bufftx[10] = "hello!\n\r";
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10 |
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11 | /* Private function prototypes -----------------------------------------------*/
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12 | void SystemClock_Config(void);
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13 | static void MX_GPIO_Init(void);
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14 | static void MX_USART1_UART_Init(void);
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15 |
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16 | int main(void)
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17 | {
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18 | HAL_Init();
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19 |
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20 | /* Configure the system clock */
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21 | SystemClock_Config();
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22 |
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23 | /* Initialize all configured peripherals */
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24 | MX_GPIO_Init();
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25 | MX_USART1_UART_Init();
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26 |
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27 | while (1)
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28 | {
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29 | HAL_UART_Transmit(&huart1, bufftx, 10, 100);
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30 | HAL_Delay(100);
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31 | }
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32 | }
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33 |
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34 | void SystemClock_Config(void)
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35 | {
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36 |
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37 | RCC_OscInitTypeDef RCC_OscInitStruct;
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38 | RCC_ClkInitTypeDef RCC_ClkInitStruct;
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39 |
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40 | /**Configure the main internal regulator output voltage
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41 | */
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42 | __HAL_RCC_PWR_CLK_ENABLE();
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43 |
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44 | __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
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45 |
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46 | /**Initializes the CPU, AHB and APB busses clocks
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47 | */
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48 | RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
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49 | RCC_OscInitStruct.HSIState = RCC_HSI_ON;
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50 | RCC_OscInitStruct.HSICalibrationValue = 16;
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51 | RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
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52 | if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
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53 | {
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54 | _Error_Handler(__FILE__, __LINE__);
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55 | }
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56 |
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57 | /**Initializes the CPU, AHB and APB busses clocks
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58 | */
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59 | RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
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60 | |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
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61 | RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
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62 | RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
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63 | RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
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64 | RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
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65 |
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66 | if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
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67 | {
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68 | _Error_Handler(__FILE__, __LINE__);
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69 | }
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70 |
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71 | /**Configure the Systick interrupt time
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72 | */
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73 | HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);
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74 |
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75 | /**Configure the Systick
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76 | */
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77 | HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);
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78 |
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79 | /* SysTick_IRQn interrupt configuration */
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80 | HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
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81 | }
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82 |
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83 | /* USART1 init function */
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84 | static void MX_USART1_UART_Init(void)
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85 | {
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86 |
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87 | huart1.Instance = USART1;
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88 | huart1.Init.BaudRate = 9600;
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89 | huart1.Init.WordLength = UART_WORDLENGTH_8B;
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90 | huart1.Init.StopBits = UART_STOPBITS_1;
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91 | huart1.Init.Parity = UART_PARITY_NONE;
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92 | huart1.Init.Mode = UART_MODE_TX_RX;
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93 | huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
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94 | huart1.Init.OverSampling = UART_OVERSAMPLING_16;
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95 | if (HAL_UART_Init(&huart1) != HAL_OK)
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96 | {
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97 | _Error_Handler(__FILE__, __LINE__);
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98 | }
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99 |
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100 | }
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101 |
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102 | static void MX_GPIO_Init(void)
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103 | {
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104 |
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105 | /* GPIO Ports Clock Enable */
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106 | __HAL_RCC_GPIOA_CLK_ENABLE();
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107 |
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108 | }
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109 |
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110 | void _Error_Handler(char *file, int line)
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111 | {
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112 | while(1)
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113 | {
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114 | }
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115 | }
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116 |
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117 | #ifdef USE_FULL_ASSERT
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118 |
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119 | void assert_failed(uint8_t* file, uint32_t line)
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120 | {
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121 |
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122 | }
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Untitled_Diagram.jpg
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