部分程序如下:
void RCC_Configura
tion(void)
{
/* RCC复位*/
RCC_DeInit();
/* 使能外部高速晶振 */
RCC_HSEConfig(RCC_HSE_ON);
/* 等待晶振稳定 */
HSEStartUpStatus = RCC_WaitForHSEStartUp();
if(HSEStartUpStatus == SUCCESS)
{
/* HCLK = SYSCLK 设置高速总线时钟=系统时钟*/
RCC_HCLKConfig(RCC_SYSCLK_Div1);
/* PCLK2 = HCLK 设置低速总线2时钟=高速总线时钟*/
RCC_PCLK2Config(RCC_HCLK_Div1);
/* PCLK1 = HCLK/2 设置低速总线1的时钟=高速时钟的二分频*/
RCC_PCLK1Config(RCC_HCLK_Div2);
/* PLLCLK = 8MHz * 9 = 72 MHz */
RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);
/* Enable PLL 使能锁相环,在使能之前设置好参数*/
RCC_PLLCmd(ENABLE);
/* Wait till PLL is ready 等待锁相环输出稳定*/
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
{
}
/* Select PLL as system clock source 将锁相环输出设置为系统时钟*/
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
/* Wait till PLL is used as system clock source 等待校验成功*/
while(RCC_GetSYSCLKSource() != 0x08)
{
}
}
}
void FSMC_Configuration(void)
{
// RCC_AHBPeriphClockCmd(RCC_AHBPeriph_FSMC, ENABLE);//使能FSMC时钟
FSMC_NORSRAMInitTypeDef FSMC_NORSRAMInitStructure;
FSMC_NORSRAMTimingInitTypeDef p;
GPIO_InitTypeDef GPIO_InitStructure;
/*FSMC总线使用的GPIO组时钟使能*/
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD | RCC_APB2Periph_GPIOE |
RCC_APB2Periph_GPIOF | RCC_APB2Periph_GPIOG | RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO, ENABLE);
/*FSMC数据线FSMC_D[0:15]初始化,推挽复用输出*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_8 | GPIO_Pin_9 |
GPIO_Pin_10 | GPIO_Pin_14 | GPIO_Pin_15;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOD, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 |
GPIO_Pin_11 | GPIO_Pin_12 | GPIO_Pin_13 | GPIO_Pin_14 |
GPIO_Pin_15;
GPIO_Init(GPIOE, &GPIO_InitStructure);
/*FSMC地址线FSMC_A[0:15]初始化,推挽复用输出*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3 |
GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_12 | GPIO_Pin_13 |
GPIO_Pin_14 | GPIO_Pin_15;
GPIO_Init(GPIOF, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3 |
GPIO_Pin_4 | GPIO_Pin_5;
GPIO_Init(GPIOG, &GPIO_InitStructure);
//以下引脚未使用:
// GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11 | GPIO_Pin_12 | GPIO_Pin_13;
// GPIO_Init(GPIOD, &GPIO_InitStructure);
/*FSMC CLK!!!,NOE和NWE初试化,推挽复用输出*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3 | GPIO_Pin_4 |GPIO_Pin_5;
GPIO_Init(GPIOD, &GPIO_InitStructure);
// /*MPU_CLK 初试化,推挽复用输出-PA8*/
// GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
// GPIO_Init(GPIOA, &GPIO_InitStructure);
/*FSMC NE1初始化,推挽复用输出*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;
GPIO_Init(GPIOD, &GPIO_InitStructure);
///*FSMC_NADV-PB7*/
// GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;
// GPIO_Init(GPIOB, &GPIO_InitStructure);
// GPIO_PinRemapConfig(GPIO_Remap_FSMC_NADV, DISABLE);
/*!< NWAIT configuration !!!!!!*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOD, &GPIO_InitStructure);
/*FSMC NBL0和NBL1初始化,进行高低字节使能,对于CPLD不需要,推挽复用输出*/
// GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1;
// GPIO_Init(GPIOE, &GPIO_InitStructure);
p.FSMC_AddressSetupTime = 0x01; //地址建立时间
p.FSMC_AddressHoldTime = 0x00; //地址保持时间
p.FSMC_DataSetupTime = 0x05; //数据建立时间
p.FSMC_BusTurnAroundDuration = 0x02; //总线恢复时间
p.FSMC_CLKDivision = 0x1; //时钟分频因子
p.FSMC_DataLatency = 0x01; //数据产生时间,访问SRAM,这个参数不起作用。
p.FSMC_AccessMode = FSMC_AccessMode_A; //FSMC NOR控制器时序
FSMC_NORSRAMInitStructure.FSMC_Bank = FSMC_Bank1_NORSRAM1; //使用了FSMC的BANK1的子板块1!!!!!!
FSMC_NORSRAMInitStructure.FSMC_DataAddressMux = FSMC_DataAddressMux_Disable;//禁止地址数据线复用
FSMC_NORSRAMInitStructure.FSMC_MemoryType = FSMC_MemoryType_SRAM; //存储器类型为SRAM!!!!!!(NOR)
FSMC_NORSRAMInitStructure.FSMC_MemoryDataWidth = FSMC_MemoryDataWidth_16b; //存储器数据宽度为16位!!!!!!
FSMC_NORSRAMInitStructure.FSMC_BurstAccessMode = FSMC_BurstAccessMode_Enable; //关闭突发模式访问(Enable)
FSMC_NORSRAMInitStructure.FSMC_AsynchronousWait = FSMC_AsynchronousWait_Disable;
FSMC_NORSRAMInitStructure.FSMC_WaitSignalPolarity = FSMC_WaitSignalPolarity_Low;//等待信号优先级,只有在使能突发访问模式才有效
FSMC_NORSRAMInitStructure.FSMC_WrapMode = FSMC_WrapMode_Disable;//关闭Wrapped burst access mode,只有在使能突发访问模式才有效
FSMC_NORSRAMInitStructure.FSMC_WaitSignalActive = FSMC_WaitSignalActive_BeforeWaitState;//等待信号设置,只有在使能突发访问模式才有效
FSMC_NORSRAMInitStructure.FSMC_WriteOperation = FSMC_WriteOperation_Enable; //使能这个BANK的写操作
FSMC_NORSRAMInitStructure.FSMC_WaitSignal = FSMC_WaitSignal_Enable;//使能/关闭等待信息设置,只在使能突发访问模式才有效(enable)
FSMC_NORSRAMInitStructure.FSMC_ExtendedMode = FSMC_ExtendedMode_Disable; //关闭Extend Mode
FSMC_NORSRAMInitStructure.FSMC_WriteBurst = FSMC_WriteBurst_Disable; //关闭Write Burst Mode
FSMC_NORSRAMInitStructure.FSMC_ReadWriteTimingStruct = &p; //读操作时序参数
FSMC_NORSRAMInitStructure.FSMC_WriteTimingStruct = &p; //写操作时序参数
FSMC_NORSRAMInit(&FSMC_NORSRAMInitStructure);
FSMC_NORSRAMCmd(FSMC_Bank1_NORSRAM1, ENABLE);//使能BANK1,SRAM1
}
int main(void)
{
RCC_Configuration();
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_FSMC, ENABLE);//使能FSMC时钟
FSMC_Configuration();
。。。
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各位大神帮忙看看,rcc时钟和fsmc的配置是不是不对?