实验原理：
STM32F767上自带FMC控制器，本实验将通过FMC总线的地址复用模式实现STM32与FPGA
之间通信，FPGA内部建立RAM块,FPGA桥接STM32和RAM块，本实验通过FSMC总线从STM32向
RAM块中写入数据，然后读取RAM出来的数据进行验证。
核心代码：
int main(void)
{
int i;
unsigned int fpga_read_data; system_clock.initialize();
fsmc.initialize();
led.initialize(); LED_GREEN_ON; while(){
for(i = ;i < ; i++){
fpga_write(i,i);
}
for(i = ;i < ; i++);
for(i = ;i < ;i++){
fpga_read_data = fpga_read(i);
if(fpga_read_data != i){
LED_GREEN_OFF;
LED_RED_ON;
}
}
}
}
module fsmc_ctrl(
input clk_25m,
input pll_100m,
input rst_n, input FSMC_CLK,
input NADV,
input WRn,
input RDn,
input CSn,
input [:]AB,
inout [:]DB
); //--------------------wire---------------------------------//
wire rd = (CSn | RDn);
wire wr = (CSn | WRn); //--------------------ab-----------------------------------//
reg [:]address; always @ (posedge NADV or negedge rst_n)
begin
if(!rst_n)
begin
address <= 'd0;
end
else
begin
address <= {AB,DB};
end end
//--------------------clk----------------------------------//
reg wr_clk1,wr_clk2; always @(posedge pll_100m or negedge rst_n)
begin
if(!rst_n)
begin
wr_clk1 <= 'd1;
wr_clk2 <= 'd1;
end
else
{wr_clk2,wr_clk1} <= {wr_clk1,wr}; //提取写时钟
end wire clk = (!wr_clk2 | !rd); //--------------------db_out-------------------------------//
wire [:]db_out;
assign DB = !rd ? db_out : 'hzzzz; //--------------------my_ram-------------------------------//
my_ram u1(
.address(address),
.clock(clk),
.data(DB),
.wren(!wr),
.rden(!rd),
.q(db_out)
);//例化ram模块 //--------------------endmodule----------------------------//
endmodule
源代码下载链接：
链接：http://pan.baidu.com/s/1hrK8c3i 密码：syfc
iCore4链接：