1 | static void RCC_Configuration(void) {
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2 |
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3 | //ErrorStatus HSEStartUpStatus = SUCCESS;
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4 |
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5 | RCC_DeInit(); // RCC system reset(for debug purpose)
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6 | RCC_HSEConfig(RCC_HSE_ON); // Enable HSE
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7 | HSEStartUpStatus = RCC_WaitForHSEStartUp(); // Wait till HSE is ready
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8 |
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9 | if (HSEStartUpStatus == SUCCESS) {
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10 |
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11 | FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable); // Enable Prefetch Buffer
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12 | FLASH_SetLatency(FLASH_Latency_2); // Flash 2 wait state
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13 | RCC_HCLKConfig(RCC_SYSCLK_Div1); // HCLK = SYSCLK
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14 | RCC_PCLK2Config(RCC_HCLK_Div1); // PCLK2 = HCLK
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15 | RCC_PCLK1Config(RCC_HCLK_Div2); // PCLK1 = HCLK/2
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16 | RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_4); // PLLCLK = 16MHz * 4 = 64 MHz
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17 | RCC_PLLCmd(ENABLE); // Enable PLL
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18 | while (RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET) { } // Wait till PLL is ready
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19 | RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK); // Select PLL as system clock source
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20 | while(RCC_GetSYSCLKSource() != 0x08) { } // Wait till PLL is used as system clock source
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21 |
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22 | } else {
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23 | // If HSE fails to start-up, the application will have wrong clock configuration.
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24 | // User can add here some code to deal with this error
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25 | while(1) { }
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26 | }
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27 |
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28 | RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2 | RCC_APB1Periph_TIM3 | RCC_APB1Periph_TIM4 |
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29 | RCC_APB1Periph_USART3 , ENABLE); // RCC_APB1Periph_I2C1 |
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30 |
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31 | RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1 | RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOC | RCC_APB2Periph_GPIOE |
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32 | RCC_APB2Periph_USART1 | RCC_APB2Periph_ADC1 |
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33 | RCC_APB2Periph_AFIO, ENABLE);
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34 |
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35 | RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
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36 |
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37 | }
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38 |
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39 | static void GPIO_Configuration(void) {
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40 |
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41 | GPIO_InitTypeDef GPIO_InitStructure;
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42 |
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43 | // SERVO OUTPUT
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44 | // PA8 = SOUT1 | PA11 = SOUT2 | PA12 = SOUT3 | PA13 = SOUT4 |
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45 | // PA14 = SOUT5 | PA15 = SOUT6 | PB4 = SOUT7 | PB5 = SOUT8
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46 | // SOUT4 (TMS/SWDIO), SOUT6 (JTDI) , SOUT7 (JNTRST) ist beim einschalten ON
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47 |
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48 | GPIO_PinRemapConfig(GPIO_Remap_SWJ_Disable, ENABLE); // Disable JTAG/SWD so pins are availble
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49 |
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50 | GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_11 | GPIO_Pin_12 | GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
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51 | GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
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52 | GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
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53 | GPIO_Init(GPIOA, &GPIO_InitStructure);
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54 | GPIOA->BRR = (GPIO_Pin_8 | GPIO_Pin_14 | GPIO_Pin_11 | GPIO_Pin_12 | GPIO_Pin_13 | GPIO_Pin_15); // ServoPins aus
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55 |
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56 | GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5;
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57 | GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
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58 | GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
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59 | GPIO_Init(GPIOB, &GPIO_InitStructure);
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60 | GPIOB->BRR = (GPIO_Pin_4 | GPIO_Pin_5); // ServoPins aus
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61 |
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62 | //........
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63 | }
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64 |
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65 | int main(void) {
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66 |
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67 | RCC_Configuration();
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68 | GPIO_Configuration();
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69 | //....
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70 |
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71 | }
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