1 | #include "main.h"
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2 |
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3 |
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4 | int main(void)
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5 | {
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6 | Init();
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7 |
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8 | while(1)
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9 | {
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10 | USART_SendData(USART1, 0xFF);
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11 | while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);
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12 | }
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13 | }
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14 |
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15 |
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16 | /*******************************************************************************
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17 | * Function Name : Init
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18 | * Description : Initializes USART, GPIOS, Clocks
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19 | * Input : None
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20 | * Output : None
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21 | * Return : None
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22 | *******************************************************************************/
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23 |
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24 | void Init(void)
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25 | {
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26 |
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27 |
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28 | RCC_HSEConfig(RCC_HSE_OFF); // We are using the Internal clock source
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29 |
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30 | /* Initialize Reset Clock Control */
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31 |
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32 | RCC_ClocksTypeDef RCC_Clocks;
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33 | RCC_GetClocksFreq(&RCC_Clocks);
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34 | SysTick_Config(RCC_Clocks.HCLK_Frequency / 1000);
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35 |
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36 |
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37 | RCC_SYSCLKConfig(RCC_SYSCLKSource_HSI); // Specify we are using the // internal clock source
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38 |
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39 | RCC_USARTCLKConfig(RCC_USART1CLK_HSI); // I wrote this instruction to // ensure I am using USART1 with HSI, the apllication wasn't working before neither
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40 |
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41 | /* Enable GPIO clock */
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42 | RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
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43 |
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44 | /* Enable USART1 Clock */
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45 | RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
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46 |
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47 |
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48 | GPIO_Config();
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49 |
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50 |
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51 | USART_InitTypeDef USART_InitStructure;
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52 |
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53 | /* USART Initialisation for MIDI standard */
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54 | USART_InitStructure.USART_BaudRate = 31250;
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55 | USART_InitStructure.USART_WordLength = USART_WordLength_8b;
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56 | USART_InitStructure.USART_StopBits = USART_StopBits_1;
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57 | USART_InitStructure.USART_Parity = USART_Parity_No;
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58 | USART_InitStructure.USART_Mode = USART_Mode_Tx;
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59 | USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
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60 |
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61 | USART_Init(USART1, &USART_InitStructure);
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62 |
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63 | USART_Cmd(USART1, ENABLE);
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64 | }
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65 |
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66 | /**
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67 | * @brief Configures GPIOS
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68 | * @param None
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69 | * @retval None
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70 | */
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71 | void GPIO_Config(void)
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72 | {
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73 |
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74 | GPIO_InitTypeDef GPIO_InitStructure;
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75 |
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76 | GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
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77 | GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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78 | GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
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79 | GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
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80 | GPIO_Init(GPIOA, &GPIO_InitStructure);
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81 |
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82 | GPIO_PinAFConfig(GPIOA, GPIO_Pin_2, GPIO_AF_0);
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83 |
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84 | }
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st-nucleo-f030r8-morpho.png
(470 KB)
