FSMC异步复用模式下，NADV和NWE信号波形不正确

mengzhu · 发表于 2014-5-19 11:24:04

大家好，我是使用的STM32F103VET6，100pin情况下的FSMC，用来外接FPGA，现在的问题是当对FPGA写数据时，在NE1为低电平时，NADV和NWE信号翻转了好几次，我看手册NE1为低时，NADV不是就翻转一次，低电平时AD0-AD7上为地址，高电平时为数据吗？我这不管怎么设置，NADV都翻转好几次？下面是我的代码，使用库的形式，帮忙分析下到底是哪儿的错误呢？

void CPLD_Init(void)
{
FSMC_NORSRAMInitTypeDef FSMC_NORSRAMInitStructure;
FSMC_NORSRAMTimingInitTypeDef p;
GPIO_InitTypeDef GPIO_InitStructure;

/* Enable FSMC clocks */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_FSMC, ENABLE);

/*-- GPIO Configuration ------------------------------------------------------*/
/* SRAM Data/address lines configuration */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | 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_Init(GPIOE, &GPIO_InitStructure);

/* NOE and NWE configuration */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5;
GPIO_Init(GPIOD, &GPIO_InitStructure);

/*!< NE1 configuration */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;
GPIO_Init(GPIOD, &GPIO_InitStructure);

/*NADV configuration */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;
GPIO_Init(GPIOB, &GPIO_InitStructure);

/*!< Configure PD6 for NOR memory Ready/Busy signal */
//   GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
//   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
//   GPIO_Init(GPIOD, &GPIO_InitStructure);

/*!< NBL0, NBL1 configuration ???©???????è??????×???????,????CPLD???è??*/
// GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1;
// GPIO_Init(GPIOE, &GPIO_InitStructure);

/*-- FSMC Configuration ------------------------------------------------------*/
p.FSMC_AddressSetupTime = 15;
p.FSMC_AddressHoldTime = 15; //when mux, AddressHoldTime>=1
p.FSMC_DataSetupTime = 15;    //DataSetupTime>=1
p.FSMC_BusTurnAroundDuration = 15;
p.FSMC_CLKDivision = 0;
p.FSMC_DataLatency = 0;
p.FSMC_AccessMode = FSMC_AccessMode_B;

FSMC_NORSRAMInitStructure.FSMC_Bank = FSMC_Bank1_NORSRAM1;
FSMC_NORSRAMInitStructure.FSMC_DataAddressMux = FSMC_DataAddressMux_Enable; //mux mode
FSMC_NORSRAMInitStructure.FSMC_MemoryType = FSMC_MemoryType_NOR; //set for get "NADV" signal
FSMC_NORSRAMInitStructure.FSMC_MemoryDataWidth = FSMC_MemoryDataWidth_8b;
FSMC_NORSRAMInitStructure.FSMC_BurstAccessMode = FSMC_BurstAccessMode_Disable;
//FSMC_NORSRAMInitStructure.FSMC_AsynchronousWait = FSMC_AsynchronousWait_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);

// GPIOD->CRH &= 0x00ffffff;
// GPIOD->CRH |= 0xbb000000;
//
// GPIOD->CRL &= 0x0f00ff00;
// GPIOD->CRL |= 0xb0bb00bb;
//
// GPIOE->CRH &= 0xfffff000;
// GPIOE->CRH |= 0x00000bbb;
//
// GPIOE->CRL &= 0x0fffffff;
// GPIOE->CRL |= 0xb0000000;
//
// GPIOB->CRL &= 0x0fffffff;
// GPIOB->CRL |= 0xb0000000;

// FSMC_Bank1->BTCR[0] = 0x00000000;
// FSMC_Bank1->BTCR[1] = 0x00000000;
// //BCR
// FSMC_Bank1->BTCR[0] |= 1<<12; //wr enable
// FSMC_Bank1->BTCR[0] |= 1<<6; //faccen
// FSMC_Bank1->BTCR[0] |= 1<<3; //memory typ
// FSMC_Bank1->BTCR[0] |= 1<<1; //mux
// FSMC_Bank1->BTCR[0] |= 1<<0; //mbken
// FSMC_Bank1->BTCR[0] |= 1<<19;
// //BTR
// FSMC_Bank1->BTCR[1] |= 15<<0; //ADDSET
// FSMC_Bank1->BTCR[1] |= 15<<4; //addhold
// FSMC_Bank1->BTCR[1] |= 15<<8; //dataset
// //FSMC_Bank1->BTCR[1] |= 1<<28;

}

谢谢阿，寄存器操作我也试过，现象类似阿