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#include "stm32f4xx.h"
#include "usart.h"
#include "delay.h"
#define Bank1_SRAM3_ADDR ((uint32_t)0x68000000)//nor/psram第三块数据的地址
#define BUFFER_SIZE 200
uint16_t Buffer[BUFFER_SIZE]={0};
//config DMA for FSMC
void DMA_Config(void)
{
DMA_InitTypeDef DMA_InitStructure;
/*时钟使能 */
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2, ENABLE);
DMA_InitStructure.DMA_Channel = DMA_Channel_7; //通道选择
DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)Bank1_SRAM3_ADDR;
DMA_InitStructure.DMA_Memory0BaseAddr =(u32)Buffer; //实际上只有后16位有效
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory; //内存到内存
DMA_InitStructure.DMA_BufferSize = BUFFER_SIZE; //数据传输量
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; //外设非增量模式
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; //存储器增量模式
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord; //外设数据长度:16位
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord; //存储器数据长度:16位
DMA_InitStructure.DMA_Mode = DMA_Mode_Normal; //使用循环模式
DMA_InitStructure.DMA_Priority = DMA_Priority_High; //高等优先级
DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;
DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_Full;
DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single; //存储器突发单次传输
DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single; //外设突发单次传输
DMA_Init(DMA2_Stream1, &DMA_InitStructure);
//双缓冲模式设置
// DMA_DoubleBufferModeConfig(DMA2_Stream0,(uint32_t)(u16 *)(ADC1ConvertedValue_b),DMA_Memory_1); //DMA_Memory_0首先被传输
// DMA_DoubleBufferModeCmd(DMA2_Stream0,ENABLE);
DMA_Cmd(DMA2_Stream1, ENABLE); //将外部采集的ADC数值放到DMA数字流里面
}
//初始化lcd
void FSMC_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
FSMC_NORSRAMInitTypeDef FSMC_NORSRAMInitStructure;//FSMC初始化
FSMC_NORSRAMTimingInitTypeDef readWriteTiming;
FSMC_NORSRAMTimingInitTypeDef writeTiming;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD | RCC_AHB1Periph_GPIOE, ENABLE);//使能PD,PE,
RCC_AHB3PeriphClockCmd(RCC_AHB3Periph_FSMC,ENABLE);//使能FSMC时钟
GPIO_InitStructure.GPIO_Pin = (3<<0)|(3<<4)|(7<<8)|(3<<14);//PD0,1,4,5,8,9,10,14,15 AF OUT
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//复用输出
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉
GPIO_Init(GPIOD, &GPIO_InitStructure);//初始化
GPIO_InitStructure.GPIO_Pin = (0X1FF<<7);//PE7~15,AF OUT
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//复用输出
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉
GPIO_Init(GPIOE, &GPIO_InitStructure);//初始化
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7 | GPIO_Pin_11 | GPIO_Pin_6;//FSMC_NE1(lcd_cs) FSMC_A16(lcd_rs) FSMC_RST
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//复用输出
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉
GPIO_Init(GPIOD, &GPIO_InitStructure);//初始化
GPIO_PinAFConfig(GPIOD,GPIO_PinSource0,GPIO_AF_FSMC);//D2
GPIO_PinAFConfig(GPIOD,GPIO_PinSource1,GPIO_AF_FSMC);//D3
GPIO_PinAFConfig(GPIOD,GPIO_PinSource4,GPIO_AF_FSMC);//RD
GPIO_PinAFConfig(GPIOD,GPIO_PinSource5,GPIO_AF_FSMC);//WR
GPIO_PinAFConfig(GPIOD,GPIO_PinSource8,GPIO_AF_FSMC);//D13
GPIO_PinAFConfig(GPIOD,GPIO_PinSource9,GPIO_AF_FSMC);//D14
GPIO_PinAFConfig(GPIOD,GPIO_PinSource10,GPIO_AF_FSMC);//D3
GPIO_PinAFConfig(GPIOD,GPIO_PinSource14,GPIO_AF_FSMC);//D0
GPIO_PinAFConfig(GPIOD,GPIO_PinSource15,GPIO_AF_FSMC);//D1
GPIO_PinAFConfig(GPIOE,GPIO_PinSource7,GPIO_AF_FSMC);//D4
GPIO_PinAFConfig(GPIOE,GPIO_PinSource8,GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOE,GPIO_PinSource9,GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOE,GPIO_PinSource10,GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOE,GPIO_PinSource11,GPIO_AF_FSMC);//D8
GPIO_PinAFConfig(GPIOE,GPIO_PinSource12,GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOE,GPIO_PinSource13,GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOE,GPIO_PinSource14,GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOE,GPIO_PinSource15,GPIO_AF_FSMC);//D12
GPIO_PinAFConfig(GPIOD,GPIO_PinSource7,GPIO_AF_FSMC);//CS(FSMCNE1)
GPIO_PinAFConfig(GPIOD,GPIO_PinSource11,GPIO_AF_FSMC);//RS(FSMCA16)
readWriteTiming.FSMC_AddressSetupTime = 0; //地址建立时间（ADDSET）为16个HCLK 1/168M=》16*6=96ns //读数据
readWriteTiming.FSMC_AddressHoldTime = 0x00; //地址保持时间（ADDHLD）模式A未用到
readWriteTiming.FSMC_DataSetupTime = 10; //数据保存时间为n个HCLK =10*6=36ns
readWriteTiming.FSMC_BusTurnAroundDuration = 0x00;
readWriteTiming.FSMC_CLKDivision = 0;
readWriteTiming.FSMC_DataLatency = 0x00;
readWriteTiming.FSMC_AccessMode = FSMC_AccessMode_A; //模式A
writeTiming.FSMC_AddressSetupTime =1; //地址建立时间（ADDSET）为9个HCLK =54ns //写时序
writeTiming.FSMC_AddressHoldTime = 0x00; //地址保持时间（A
writeTiming.FSMC_DataSetupTime = 1; //数据保存时间为6ns*9个HCLK=54ns
writeTiming.FSMC_BusTurnAroundDuration = 0x00; //总线转换周期
writeTiming.FSMC_CLKDivision = 0x16; //时钟分频因子
writeTiming.FSMC_DataLatency = 0x00; //数据延迟时间，若控制异步存储器，本参数无效
writeTiming.FSMC_AccessMode = FSMC_AccessMode_A; //访问模式：模式A
FSMC_NORSRAMInitStructure.FSMC_Bank = FSMC_Bank1_NORSRAM3;// 这里我们使用FSMC_NE3
FSMC_NORSRAMInitStructure.FSMC_DataAddressMux = FSMC_DataAddressMux_Disable; // 不复用数据地址
FSMC_NORSRAMInitStructure.FSMC_MemoryType =FSMC_MemoryType_SRAM;// FSMC_MemoryType_SRAM; //SRAM
FSMC_NORSRAMInitStructure.FSMC_MemoryDataWidth = FSMC_MemoryDataWidth_16b;//存储器数据宽度为16bit
FSMC_NORSRAMInitStructure.FSMC_BurstAccessMode =FSMC_BurstAccessMode_Disable;// FSMC_BurstAccessMode_Disable;
FSMC_NORSRAMInitStructure.FSMC_WaitSignalPolarity = FSMC_WaitSignalPolarity_Low;
FSMC_NORSRAMInitStructure.FSMC_AsynchronousWait=FSMC_AsynchronousWait_Disable;
FSMC_NORSRAMInitStructure.FSMC_WrapMode = FSMC_WrapMode_Disable;
FSMC_NORSRAMInitStructure.FSMC_WaitSignalActive = FSMC_WaitSignalActive_BeforeWaitState;
FSMC_NORSRAMInitStructure.FSMC_WriteOperation = FSMC_WriteOperation_Enable; // 存储器写使能
FSMC_NORSRAMInitStructure.FSMC_WaitSignal = FSMC_WaitSignal_Disable;
FSMC_NORSRAMInitStructure.FSMC_ExtendedMode = FSMC_ExtendedMode_Enable; // 读写使用不同的时序
FSMC_NORSRAMInitStructure.FSMC_WriteBurst = FSMC_WriteBurst_Disable;
FSMC_NORSRAMInitStructure.FSMC_ReadWriteTimingStruct = &readWriteTiming; //读写时序
FSMC_NORSRAMInitStructure.FSMC_WriteTimingStruct = &writeTiming; //写时序
FSMC_NORSRAMInit(&FSMC_NORSRAMInitStructure); //初始化FSMC配置
FSMC_NORSRAMCmd(FSMC_Bank1_NORSRAM3, ENABLE); // 使能FSMC_NE3
}
void TIMx_DMA_Config(u16 arr,u16 psc)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
/*外设时钟*/
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM8,ENABLE); //TIM8时钟使能
/*--------------------时基结构体初始化-------------------------*/
TIM_TimeBaseStructure.TIM_Period=arr; //自动重装载值
TIM_TimeBaseStructure.TIM_Prescaler=psc; //定时器分频
TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1; //时钟分频因子
TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up; //向上计数模式
TIM_TimeBaseStructure.TIM_RepetitionCounter=0; // 重复计数器的值，没用到不用管
TIM_TimeBaseInit(TIM8,&TIM_TimeBaseStructure);//初始化定时器8
TIM_OC1Init(TIM8, &TIM_OCInitStructure); //根据T指定的参数初始化外设TIM8 4OC1
// /* 使能通道1重载 */
TIM_OC1PreloadConfig(TIM8,TIM_OCPreload_Enable); //使能TIM8在CCR1上的预装载寄存器
DMA_Cmd(DMA2_Stream1, ENABLE);
//将外部采集的ADC数值放到DMA数字流里面
TIM_Cmd(TIM8, ENABLE); //使能TIM14
/*--------------------定时器触发DMA初始化-------------------*/
TIM_DMAConfig(TIM8, TIM_DMABase_CCR1, TIM_DMABurstLength_2Bytes );
TIM_DMACmd(TIM8,TIM_DMA_Update, ENABLE); //定时器触发DMA请求
}
////定时器x中断服务函数，
//void TIM8_UP_TIM13_IRQHandler(void)//整个程序是基于定时器中断
//{
// if(TIM_GetITStatus(TIM8,TIM_IT_Update)==SET) //溢出中断
// {
//
// }
// TIM_ClearITPendingBit(TIM8,TIM_IT_Update); //清除中断标志位
//}
int FSMC_Read(void)
{
return *(vu16*)(Bank1_SRAM3_ADDR) & 0x03ff;
}
int main(void)
{
static int i = 0,k=0,n;
u16 temp[BUFFER_SIZE];
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);//设置系统中断优先级分组2
delay_init(168); //初始化延时函数，这部分用了正点原子的代码
uart_init(115200); //初始化串口波特率为115200
delay_ms(1000);
FSMC_Init(); //1配置FSMC
TIMx_DMA_Config(1,0);
DMA_Config(); //2配值DMA
delay_ms(1000);
for(i=0; i<BUFFER_SIZE;i++)
{
printf("%d\r\n",Buffer[i] & 0x03ff);
}
while(1);
}
我用F103定时器触发DMA传输GPIO数据是的速度是可控的，但是F4的一直都不行（也是传输GPIO数据），现在换成F407用DMA传输FSMC的数据也不行。难受
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发表于 2023-11-1 15:45:24
发表于 2023-11-1 20:52:52
