| 0,0 → 1,129 |
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| #include "stm32f10x_it.h" |
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| GPIO_InitTypeDef GPIO_InitStructure; |
| ErrorStatus HSEStartUpStatus; |
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| void RCC_Configuration(void); |
| void Delay(vu32 nCount); |
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| void SystemInit() |
| { |
| |
| /* Configure the system clocks */ |
| RCC_Configuration(); |
| |
| /* NVIC Configuration */ |
| // NVIC_Configuration(); |
| |
| /* Enable GPIOC clock */ |
| RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE); |
| RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE); |
| |
| /* Configure PC.4 as Output push-pull */ |
| GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5; |
| GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz; |
| GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; |
| GPIO_Init(GPIOC, &GPIO_InitStructure); |
| |
| /* Configure PC.4 as Output push-pull */ |
| GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7 | GPIO_Pin_8; |
| GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz; |
| GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; |
| GPIO_Init(GPIOB, &GPIO_InitStructure); |
| |
| } |
| |
| |
| int main(void) |
| { |
| while (1) |
| { |
| GPIO_SetBits(GPIOC, GPIO_Pin_5); |
| GPIO_ResetBits(GPIOC, GPIO_Pin_4); |
| GPIO_SetBits(GPIOB, GPIO_Pin_7); |
| GPIO_ResetBits(GPIOB, GPIO_Pin_8); |
| Delay(0x1fFFFF); |
| |
| GPIO_SetBits(GPIOC, GPIO_Pin_4); |
| GPIO_ResetBits(GPIOC, GPIO_Pin_5); |
| GPIO_SetBits(GPIOB, GPIO_Pin_8); |
| GPIO_ResetBits(GPIOB, GPIO_Pin_7); |
| Delay(0x1fFFFF); |
| } |
| } |
| |
| /******************************************************************************* |
| * Function Name : RCC_Configuration |
| * Description : Configures the different system clocks. |
| * Input : None |
| * Output : None |
| * Return : None |
| *******************************************************************************/ |
| void RCC_Configuration(void) |
| { |
| /* RCC system reset(for debug purpose) */ |
| RCC_DeInit(); |
| |
| /* Enable HSE */ |
| RCC_HSEConfig(RCC_HSE_ON); |
| |
| /* Wait till HSE is ready */ |
| HSEStartUpStatus = RCC_WaitForHSEStartUp(); |
| |
| if(HSEStartUpStatus == SUCCESS) |
| { |
| /* Enable Prefetch Buffer */ |
| // FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable); |
| |
| /* Flash 2 wait state */ |
| // FLASH_SetLatency(FLASH_Latency_2); |
| |
| /* HCLK = SYSCLK */ |
| RCC_HCLKConfig(RCC_SYSCLK_Div1); |
| |
| /* PCLK2 = HCLK */ |
| RCC_PCLK2Config(RCC_HCLK_Div1); |
| |
| /* PCLK1 = HCLK/2 */ |
| RCC_PCLK1Config(RCC_HCLK_Div2); |
| |
| /* PLLCLK = 8MHz * 4 = 32 MHz */ |
| RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_2); |
| |
| /* Enable PLL */ |
| RCC_PLLCmd(ENABLE); |
| |
| /* Wait till PLL is ready */ |
| while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET) |
| { |
| } |
| |
| /* Select PLL as system clock source */ |
| RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK); |
| |
| /* Wait till PLL is used as system clock source */ |
| while(RCC_GetSYSCLKSource() != 0x08) |
| { |
| } |
| } |
| } |
| |
| |
| |
| /******************************************************************************* |
| * Function Name : Delay |
| * Description : Inserts a delay time. |
| * Input : nCount: specifies the delay time length. |
| * Output : None |
| * Return : None |
| *******************************************************************************/ |
| void Delay(vu32 nCount) |
| { |
| for(; nCount != 0; nCount--); |
| } |
| |