1. 關(guān)于FSMC

FSMC引腳定義：

地址線：A16-23 共8根地址線

數(shù)據(jù)線有16根(看單片機(jī)的原理圖)

控制信號(hào)RD、WR、NE1/NCE2,這兩個(gè)片選都接的是PD7，NE1即選中BAN1，用于擴(kuò)展外部SRAM,FPGA相當(dāng)于掛在單片機(jī)的BANK1，實(shí)質(zhì)就是單片機(jī)進(jìn)行讀寫FPGA。

2.FPGA測(cè)試程序(網(wǎng)上找的)

module STM32_FPGA(

input main_clk,

// output arm_clk,

output led,

input [2:0] addr,

inout [15:0] data,

input FPGA_CS0,//FPGA片選

input RD,

input WR

);

wire clk;

pll_50M pll_50M_inst (

.inclk0 ( main_clk ),//25M

.c0 ( clk ), //50M

.c1 ( arm_clk ) //8M

);

//reg [24:0] cnt = 0;

//always @(posedge clk)

// cnt <= cnt + 1'b1;

//assign led = cnt[24];

//AWE的上升沿，將數(shù)據(jù)寫入FPGA寄存器

reg [15:0] ARM_FPGA_REG0;

reg [15:0] ARM_FPGA_REG1;

reg [15:0] ARM_FPGA_REG2;

reg [15:0] ARM_FPGA_REG3;

reg [15:0] ARM_FPGA_REG4;

reg [15:0] ARM_FPGA_REG5;

reg [15:0] ARM_FPGA_REG6;

reg [15:0] ARM_FPGA_REG7;

wire rd_en = ~FPGA_CS0 && ~RD;

reg [15:0] data_reg;

always @(*)

begin

if(rd_en)

begin

case(addr[2:0])

3'd0 : data_reg <= ARM_FPGA_REG0;

3'd1 : data_reg <= ARM_FPGA_REG1;

3'd2 : data_reg <= ARM_FPGA_REG2;

3'd3 : data_reg <= ARM_FPGA_REG3;

3'd4 : data_reg <= ARM_FPGA_REG4;

3'd5 : data_reg <= ARM_FPGA_REG5;

3'd6 : data_reg <= ARM_FPGA_REG6;

3'd7 : data_reg <= ARM_FPGA_REG7;

default: ;

endcase

end

end

/* AWE上升沿DSP的數(shù)據(jù)寫入FPGA，即sampling point */

reg WR_tmp1;

reg WR_tmp2;

always @(posedge main_clk)//之前是CLK

begin

WR_tmp1 <= WR;

WR_tmp2 <= WR_tmp1;

end

wire WR_RISING = ~WR_tmp2 && WR_tmp1;//與clk同步

always @(*)

begin

if(WR_RISING)

begin

case(addr[2:0])

3'd0 : ARM_FPGA_REG0 <= data;

3'd1 : ARM_FPGA_REG1 <= data;

3'd2 : ARM_FPGA_REG2 <= data;

3'd3 : ARM_FPGA_REG3 <= data;

3'd4 : ARM_FPGA_REG4 <= data;

3'd5 : ARM_FPGA_REG5 <= data;

3'd6 : ARM_FPGA_REG6 <= data;

3'd7 : ARM_FPGA_REG7 <= data;

default: ;

endcase

end

end

assign data = rd_en ? data_reg : 16'hzzzz;

endmodule

3.STM32測(cè)試程序

//讀寫函數(shù)

#define fpga_write(offset,data) *((volatile unsigned short int *)(0x60000000 + (offset << 17))) = data

#define fpga_read(offset) *((volatile unsigned short int *)(0x60000000 + (offset << 17)))

//FSMC初始化函數(shù)，用LCD改的

void fcmc_Init(void )

{

GPIO_InitTypeDef GPIO_InitStructure;

FSMC_NORSRAMInitTypeDef FSMC_NORSRAMInitStructure;

FSMC_NORSRAMTimingInitTypeDef p;

RCC_AHB3PeriphClockCmd(RCC_AHB3Periph_FSMC, ENABLE);

RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB | RCC_AHB1Periph_GPIOD | RCC_AHB1Periph_GPIOE | RCC_AHB1Periph_GPIOG, ENABLE);

GPIO_PinAFConfig(GPIOB, GPIO_PinSource7, GPIO_AF_FSMC);

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;

GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;

GPIO_Init(GPIOB, &GPIO_InitStructure);

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_PinSource6, 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_PinSource13, GPIO_AF_FSMC);

GPIO_PinAFConfig(GPIOD, GPIO_PinSource14, GPIO_AF_FSMC);

GPIO_PinAFConfig(GPIOD, GPIO_PinSource15, GPIO_AF_FSMC);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_3 | GPIO_Pin_4 | GPIO_Pin_5 |

GPIO_Pin_6 | 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(GPIOD, &GPIO_InitStructure);

GPIO_PinAFConfig(GPIOE, GPIO_PinSource2 , GPIO_AF_FSMC);

GPIO_PinAFConfig(GPIOE, GPIO_PinSource3 , GPIO_AF_FSMC);

GPIO_PinAFConfig(GPIOE, GPIO_PinSource4 , GPIO_AF_FSMC);

GPIO_PinAFConfig(GPIOE, GPIO_PinSource5 , GPIO_AF_FSMC);

GPIO_PinAFConfig(GPIOE, GPIO_PinSource6 , 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);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2 | GPIO_Pin_3 | GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_6 | 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);

GPIO_PinAFConfig(GPIOG, GPIO_PinSource13, GPIO_AF_FSMC);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;

GPIO_Init(GPIOG, &GPIO_InitStructure);

p.FSMC_AddressSetupTime = 1;

p.FSMC_AddressHoldTime = 0;

p.FSMC_DataSetupTime = 4;

p.FSMC_BusTurnAroundDuration = 0;

p.FSMC_CLKDivision = 0;

p.FSMC_DataLatency = 0;

p.FSMC_AccessMode = FSMC_AccessMode_A;

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_Disable;

FSMC_NORSRAMInitStructure.FSMC_WriteBurst = FSMC_WriteBurst_Disable;

FSMC_NORSRAMInitStructure.FSMC_ReadWriteTimingStruct = &p;

FSMC_NORSRAMInitStructure.FSMC_WriteTimingStruct = &p;

FSMC_NORSRAMInit(&FSMC_NORSRAMInitStructure);

//FSMC Bank1_SRAM1 Bank

FSMC_NORSRAMCmd(FSMC_Bank1_NORSRAM1, ENABLE);

delay_ms(50);

}

4.最后用quartusii中sigtapII測(cè)試