stm32f207vet6 外扩SRAM的问题
各位大侠你们好！
我在使用stm32f207vet6 外扩SRAM的时候，碰到问题啦，
外挂一个IS61WV25616，CPU和RAM之间用CPLD链接，A15~A0 使用FSMC_NL的下降沿锁存
使用MDK 仿真，在memory窗口改变数据是好的，配置如下
void FSMC_Config(void)
{
GPIO_InitTypeDef GPIO_InitStruct;
FSMC_NORSRAMInitTypeDefFSMC_NORSRAMInitStructure;
FSMC_NORSRAMTimingInitTypeDefTiming_read, Timing_write;
//-- Enable FSMC clock---------------------------------
RCC_AHB3PeriphClockCmd(RCC_AHB3Periph_FSMC, ENABLE);
// Configure GPIOB pins :
// PB0 ncin PP_no PB1 ncin PP_no
// PB2 ETH_RST out PP_down PB3 SPISCKSPI1
// PB4 SPIMISOSPI1 PB5 SPIMOSISPI1
// PB6 ncin PP_no PB7 FSMC_NL AF PP_no
// PB8 nc in PP_no PB9 FMQAF PP_no
// PB10 nc in PP_no PB11 ETH_TX_EN AF PP_no
// PB12 ETH_TXD_0 AF PP_no PB13 ETH_TXD_1 AF PP_no
// PB14 Device_DM AF PP_no PB15 Device_DP AF PP_no
//
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_7;//FSMC_NL
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;
GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOB, &GPIO_InitStruct);
GPIO_PinAFConfig(GPIOB, GPIO_PinSource7,GPIO_AF_FSMC);
// Configure GPIOD pins :
// PD0 FSMC_D2 AF PP_no PD1 FSMC_D3 AF PP_no
// PD2 T3_ETR AF PP_no PD3 FSMC_CLK AF PP_no
// PD4 FSMC_NOE AF PP_no PD5 FSMC_NWE AF PP_no
// PD6 nc in PD7 FSMC_NE1AF PP_no
// PD8 FSMC_D13 AF PP_no PD9 FSMC_D14 AF PP_no
// PD10 FSMC_D15 AF PP_no PD11 FSMC_A16 AF PP_no
// PD12 FSMC_A17 AF PP_no PD13 A18 out PP_up
// PD14 FSMC_D0 AF PP_no PD15FSMC_D1 AF PP_no
//
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_7|GPIO_Pin_8
|GPIO_Pin_9|GPIO_Pin_10 |GPIO_Pin_11|GPIO_Pin_12|GPIO_Pin_14 |GPIO_Pin_15;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;
GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOD, &GPIO_InitStruct);
GPIO_PinAFConfig(GPIOD, GPIO_PinSource0,GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOD, GPIO_PinSource1,GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOD, GPIO_PinSource3,GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOD, GPIO_PinSource4,GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOD, GPIO_PinSource5,GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOD, GPIO_PinSource7,GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOD, GPIO_PinSource8,GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOD, GPIO_PinSource9,GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOD, GPIO_PinSource10,GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOD, GPIO_PinSource11,GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOD, GPIO_PinSource12,GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOD, GPIO_PinSource14,GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOD, GPIO_PinSource15,GPIO_AF_FSMC);
GPIO_InitStruct.GPIO_Pin = FSMC_Addr18;//PD13 A18 out PP_up
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;
GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_DOWN;
GPIO_Init(GPIOD, &GPIO_InitStruct);
GPIO_ResetBits(GPIOD, FSMC_Addr18);
// Configure GPIOE pins :
// PE0 FSMC_NBL0AF PP_no PE1 FSMC_NBL1AF PP_no
// PE2 UPDATE out PP_down PE3 PLL_LOCKED out PP_up
// PE4 PLL_RSTout PP_up PE5 OUT_FAULT1 out PP_up
// PE6 CS_FPGA out PP_down PE7 FSMC_D4 AF PP_no
// PE8 FSMC_D5 AF PP_no PE9 FSMC_D6 AF PP_no
// PE10 FSMC_D7 AF PP_no PE11 FSMC_D8 AF PP_no
// PE12 FSMC_D9 AF PP_no PE13 FSMC_D10 AF PP_no
// PE14 FSMC_D11 AF PP_no PE15 FSMC_D12 AF PP_no
//
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|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_InitStruct.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;
GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOE, &GPIO_InitStruct);
GPIO_PinAFConfig(GPIOE, GPIO_PinSource0,GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOE, GPIO_PinSource1,GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOE, GPIO_PinSource7,GPIO_AF_FSMC);
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);
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);
//-- FSMC Configuration --------------------------------
//------------------ SRAM Bank 1 ---------------------
//-- FSMC_Bank1_NORSRAM1 configuration----------------
Timing_read.FSMC_AddressSetupTime = 3;
Timing_read.FSMC_AddressHoldTime = 0;
Timing_read.FSMC_DataSetupTime = 3;
Timing_read.FSMC_BusTurnAroundDuration =3;
Timing_read.FSMC_CLKDivision = 0;
Timing_read.FSMC_DataLatency = 0;
Timing_read.FSMC_AccessMode = FSMC_AccessMode_C;
Timing_write.FSMC_AddressSetupTime = 3;
Timing_write.FSMC_AddressHoldTime = 0;
Timing_write.FSMC_DataSetupTime = 3;
Timing_write.FSMC_BusTurnAroundDuration = 3;
Timing_write.FSMC_CLKDivision = 0;
Timing_write.FSMC_DataLatency = 0;
Timing_write.FSMC_AccessMode = FSMC_AccessMode_C;
//-- SRAM configuration --------------------------------
// LCD configured as follow:
// - Data/Address MUX = Enable
// - Memory Type = SRAM
// - Data Width = 16bit
// - Extended Mode = Enable
// - Asynchronous Wait = Disable
FSMC_NORSRAMInitStructure.FSMC_Bank = FSMC_Bank1_NORSRAM1;
FSMC_NORSRAMInitStructure.FSMC_DataAddressMux = FSMC_DataAddressMux_Enable;
FSMC_NORSRAMInitStructure.FSMC_MemoryType = FSMC_MemoryType_SRAM;
FSMC_NORSRAMInitStructure.FSMC_MemoryDataWidth = FSMC_MemoryDataWidth_16b;
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_Enable;
FSMC_NORSRAMInitStructure.FSMC_WriteBurst = FSMC_WriteBurst_Disable;
FSMC_NORSRAMInitStructure.FSMC_ReadWriteTimingStruct = &Timing_read;
FSMC_NORSRAMInitStructure.FSMC_WriteTimingStruct = &Timing_write;
FSMC_NORSRAMInit(&FSMC_NORSRAMInitStructure);
//---BANK 1 (of NOR/SRAM Bank 1~4) is enabled ----------
FSMC_NORSRAMCmd(FSMC_Bank1_NORSRAM1, ENABLE);
}
如果使用下面的程序，往RAM中写数据，在memory窗口看的话是乱七八糟
int main( void )
{
u16 *ptr;
u16 i,num;
GPIO_Config();
FSMC_Config();
while(1)
{
ptr = (u16 *)&LCD_Disp_Buff;
for(i=0;i<65535;i++)
{
*ptr = i;
//num = *ptr;
ptr++;
}
}
}
这个到底是怎么回事情？还望各位大侠不吝赐教
感觉是地址锁存不对，
换成模式D addrset=2 addrhold=1 dataset=2FSMC_NL上升沿锁存，还是不对，
按照我的程序，地址应该不动才对，始终应该是一个电平，
可是我在锁存出来的地址线A15~A0上面怎么看到电平波动？
这到底是怎么回事情？ //-- FSMC Configuration --------------------------------
//------------------ SRAM Bank 1 ---------------------
//-- FSMC_Bank1_NORSRAM1 configuration----------------
Timing_read.FSMC_AddressSetupTime = 2;
Timing_read.FSMC_AddressHoldTime = 1;
Timing_read.FSMC_DataSetupTime = 2;
Timing_read.FSMC_BusTurnAroundDuration =2;
Timing_read.FSMC_CLKDivision = 0;
Timing_read.FSMC_DataLatency = 0;
Timing_read.FSMC_AccessMode = FSMC_AccessMode_D;
Timing_write.FSMC_AddressSetupTime = 2;
Timing_write.FSMC_AddressHoldTime = 1;
Timing_write.FSMC_DataSetupTime = 2;
Timing_write.FSMC_BusTurnAroundDuration = 2;
Timing_write.FSMC_CLKDivision = 0;
Timing_write.FSMC_DataLatency = 0;
Timing_write.FSMC_AccessMode = FSMC_AccessMode_D;
//-- SRAM configuration --------------------------------
// LCD configured as follow:
// - Data/Address MUX = Enable
// - Memory Type = SRAM
// - Data Width = 16bit
// - Extended Mode = Enable
// - Asynchronous Wait = Disable
FSMC_NORSRAMInitStructure.FSMC_Bank = FSMC_Bank1_NORSRAM1;
FSMC_NORSRAMInitStructure.FSMC_DataAddressMux = FSMC_DataAddressMux_Enable;
FSMC_NORSRAMInitStructure.FSMC_MemoryType = FSMC_MemoryType_SRAM;
FSMC_NORSRAMInitStructure.FSMC_MemoryDataWidth = FSMC_MemoryDataWidth_16b;
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_Enable;
FSMC_NORSRAMInitStructure.FSMC_WriteBurst = FSMC_WriteBurst_Disable;
FSMC_NORSRAMInitStructure.FSMC_ReadWriteTimingStruct = &Timing_read;
FSMC_NORSRAMInitStructure.FSMC_WriteTimingStruct = &Timing_write;
FSMC_NORSRAMInit(&FSMC_NORSRAMInitStructure);
//---BANK 1 (of NOR/SRAM Bank 1~4) is enabled ----------
FSMC_NORSRAMCmd(FSMC_Bank1_NORSRAM1, ENABLE); 看了CPU出来的时序，好像在ADDRSET段，data线上面的数据没变，应该出来始终为0才对 看起来好像就是上次输出的数据，而不是地址，这到底是怎么回事情？ 使用模式D，
FSMC_NORSRAMInitStructure.FSMC_Bank = FSMC_Bank1_NORSRAM1;
FSMC_NORSRAMInitStructure.FSMC_DataAddressMux = FSMC_DataAddressMux_Enable;
FSMC_NORSRAMInitStructure.FSMC_MemoryType = FSMC_MemoryType_NOR;
FSMC_NORSRAMInitStructure.FSMC_MemoryDataWidth = FSMC_MemoryDataWidth_16b;
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_Enable;
FSMC_NORSRAMInitStructure.FSMC_WriteBurst = FSMC_WriteBurst_Disable;
FSMC_NORSRAMInitStructure.FSMC_ReadWriteTimingStruct = &Timing_read;
FSMC_NORSRAMInitStructure.FSMC_WriteTimingStruct = &Timing_write;
数据线上面，好像还是没有地址项
解决问题啦，应该使用RM0033.pdf 1267页的
Muxed mode - multiplexed asynchronous access to NOR Flash memory
就可以解决啦 给大家共享下
//-- FSMC_Bank1_NORSRAM1 configuration----------------
Timing_read.FSMC_AddressSetupTime = 2;
Timing_read.FSMC_AddressHoldTime = 1;
Timing_read.FSMC_DataSetupTime = 3;
Timing_read.FSMC_BusTurnAroundDuration =2;
Timing_read.FSMC_CLKDivision = 0;
Timing_read.FSMC_DataLatency = 0;
Timing_read.FSMC_AccessMode = FSMC_AccessMode_D;
Timing_write.FSMC_AddressSetupTime = 2;
Timing_write.FSMC_AddressHoldTime = 1;
Timing_write.FSMC_DataSetupTime = 3;
Timing_write.FSMC_BusTurnAroundDuration = 2;
Timing_write.FSMC_CLKDivision = 0;
Timing_write.FSMC_DataLatency = 0;
Timing_write.FSMC_AccessMode = FSMC_AccessMode_D;
//-- SRAM configuration --------------------------------
// LCD configured as follow:
// - Data/Address MUX = Enable
// - Memory Type = SRAM
// - Data Width = 16bit
// - Extended Mode = Enable
// - Asynchronous Wait = Disable
FSMC_NORSRAMInitStructure.FSMC_Bank = FSMC_Bank1_NORSRAM1;
FSMC_NORSRAMInitStructure.FSMC_DataAddressMux = FSMC_DataAddressMux_Enable;
FSMC_NORSRAMInitStructure.FSMC_MemoryType = FSMC_MemoryType_NOR;
FSMC_NORSRAMInitStructure.FSMC_MemoryDataWidth = FSMC_MemoryDataWidth_16b;
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 = &Timing_read;
FSMC_NORSRAMInitStructure.FSMC_WriteTimingStruct = &Timing_write;
FSMC_NORSRAMInit(&FSMC_NORSRAMInitStructure);
//---BANK 1 (of NOR/SRAM Bank 1~4) is enabled ----------
FSMC_NORSRAMCmd(FSMC_Bank1_NORSRAM1, ENABLE); 外扩SRAM，可以选择SQPI PSRAM，通过SPI或者Quad SPI接口来实现，在QSPI QCLK=60MHz情况下，memory map with DMA或者memory map with DMA2D，读取速度约为28MB/s (实测速度， STM32F746， HCLK 180MH在）
SOP-8封装，可以提供4MB的大内存，体积很小，价格比SRAM便宜很多
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