求助 fsmc无wr信号输出

borobudur

使用stm32f103ze控制一个2k的8位ram，使用模式A，bank1，非总线复用，测试读写ram的时候用示波器观察不到wr信号的输出。
wr没有虚焊或短路
在调试的过程中偶尔有过几次读写ram正常的情况，但是只要修改下载程序后就又会找不到wr信号输出（没有修改fsmc初始化程序） 
谢谢

fsmc初始化代码如下

static void GPIO_Config(void)

{

    GPIO_InitTypeDef GPIO_InitStructure;

    

    /* Enable the FSMC Clock */

    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_FSMC, ENABLE);

    

    /* config vpc3 gpio clock base on FSMC */

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD | RCC_APB2Periph_GPIOE| RCC_APB2Periph_GPIOF| RCC_APB2Periph_GPIOG|RCC_APB2Periph_AFIO , ENABLE);

    

   

    /* config tft data lines base on FSMC

* data lines,FSMC-D0~D7: PD 14 15 0 1,PE 7 8 9 10 

* address lines,FSMC-A0~A11: PF 0,1,2,3,4,5,12,13,14,PG 0,1

*  rd : PD4 

*  wr: PD5

*/

    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;

    

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1  |GPIO_Pin_4 | GPIO_Pin_5| GPIO_Pin_14 |GPIO_Pin_15;

    GPIO_Init(GPIOD, &GPIO_InitStructure);

    

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10;  

    GPIO_Init(GPIOE, &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_Pin_12 | GPIO_Pin_13 | 

                                  GPIO_Pin_14;  

    GPIO_Init(GPIOF, &GPIO_InitStructure); 

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0  ;  

    GPIO_Init(GPIOG, &GPIO_InitStructure); 

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1  ;  

    GPIO_Init(GPIOG, &GPIO_InitStructure);    

  }

static void FSMC_Config(void)

{

    FSMC_NORSRAMInitTypeDef  FSMC_NORSRAMInitStructure;

    FSMC_NORSRAMTimingInitTypeDef  p; 

   

        RCC_AHBPeriphClockCmd(RCC_AHBPeriph_FSMC, ENABLE);

    p.FSMC_AddressSetupTime = 0x01;

    p.FSMC_AddressHoldTime = 0x05;

    p.FSMC_DataSetupTime = 0x3F;

    p.FSMC_BusTurnAroundDuration = 0x00;

    p.FSMC_CLKDivision = 0x01;

    p.FSMC_DataLatency = 0x02;

    p.FSMC_AccessMode = FSMC_AccessMode_A;

    

    FSMC_NORSRAMInitStructure.FSMC_Bank = FSMC_Bank1_NORSRAM1;

    FSMC_NORSRAMInitStructure.FSMC_DataAddressMux = FSMC_DataAddressMux_Disable;

    FSMC_NORSRAMInitStructure.FSMC_MemoryType = FSMC_MemoryType_SRAM;

    FSMC_NORSRAMInitStructure.FSMC_MemoryDataWidth = FSMC_MemoryDataWidth_8b;   

    FSMC_NORSRAMInitStructure.FSMC_BurstAccessMode = FSMC_BurstAccessMode_Disable;  

    FSMC_NORSRAMInitStructure.FSMC_WaitSignalPolarity = FSMC_WaitSignalPolarity_Low;   

    FSMC_NORSRAMInitStructure.FSMC_WrapMode = FSMC_WrapMode_Disable;   

    FSMC_NORSRAMInitStructure.FSMC_WaitSignalActive = FSMC_WaitSignalActive_BeforeWaitState;

    FSMC_NORSRAMInitStructure.FSMC_WriteOperation = FSMC_WriteOperation_Enable;

    FSMC_NORSRAMInitStructure.FSMC_WaitSignal = FSMC_WaitSignal_Disable;

    FSMC_NORSRAMInitStructure.FSMC_ExtendedMode = FSMC_ExtendedMode_Disable;

    FSMC_NORSRAMInitStructure.FSMC_WriteBurst = FSMC_WriteBurst_Disable;

    FSMC_NORSRAMInitStructure.FSMC_ReadWriteTimingStruct = &p;

    FSMC_NORSRAMInitStructure.FSMC_WriteTimingStruct = &p;

   

    FSMC_NORSRAMInit(&FSMC_NORSRAMInitStructure); 

    

    /* Enable FSMC Bank1_SRAM Bank */

    FSMC_NORSRAMCmd(FSMC_Bank1_NORSRAM1, ENABLE);  

}

测试用代码如下：

while(1)

{

Delay_us(1);

*(__IO uint8_t*)(0x60000000  + 0xFA) = 1;

Delay_us(1);

*(__IO uint8_t*)(0x60000000 + 0xFB) = 2;

Delay_us(1);

*(__IO uint8_t*)(0x60000000 + 0xFC) = 3;

Delay_us(1);

*( __IO uint8_t*)(0x60000000+ 0xFD) = 4;

    Delay_us(1);

*(__IO uint8_t*)(0x60000000 + 0xFE) = 5; 

Delay_us(1); 

*(__IO uint8_t*)(0x60000000 + 0xFF) = 6; 

Delay_us(1);  

 

    test[0]= *( __IO uint8_t*)(0x60000000  + 0xFA);

   Delay_us(1);

test[1]= *(__IO uint8_t *)(0x60000000  + 0xFB);

Delay_us(1);

test[2]= *( __IO uint8_t*)(0x60000000  + 0xFC);

Delay_us(1);

test[3]= *( __IO uint8_t*)(0x60000000  + 0xFD);

  Delay_us(1);

test[4]= *(__IO uint8_t*)(0x60000000  + 0xFE);

Delay_us(1);

test[5]= *(__IO uint8_t*)(0x60000000  + 0xFF);

  Delay_us(1);

 

    }

示波器波形：
1.A0
2.RD
3.WR
4.D0

正点原子

看IO配置没问题哦.
可以用我们战舰板的代码测试下.

trymebest

楼主 这个问题解决了没有！！！我也在这块停着呢！！！等着你的回复