实验现象：
1、先烧写FPGA程序，再烧写ARM程序，ARM程序烧写完毕后即开始读写RAM测试，测试成功，绿色ARM·LED亮，测试失败，红色ARM·LED闪烁。
2、测试成功，ARM通过映射寄存器来控制FPGA三色LED循环点亮。
核心代码：
int main(void)
{
/* USER CODE BEGIN 1 */
int i;
/* USER CODE END 1 */
/* MCU Configuration----------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_FMC_Init();
/* USER CODE BEGIN 2 */
for(i = 0;i < 512;i ++){
fpga_write(i, 2 * i);
}
for(i = 0;i < 512;i ++){
if(fpga_read(i) != 2*i){
while(1){
LED_RED_ON;
HAL_Delay(500);
LED_RED_OFF;
HAL_Delay(500);
}
}
}
LED_GREEN_ON;
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
FPGA_LED_RED_ON;
FPGA_LED_GREEN_OFF;
FPGA_LED_BLUE_OFF;
HAL_Delay(500);
FPGA_LED_RED_OFF;
FPGA_LED_GREEN_ON;
FPGA_LED_BLUE_OFF;
HAL_Delay(500);
FPGA_LED_RED_OFF;
FPGA_LED_GREEN_OFF;
FPGA_LED_BLUE_ON;
HAL_Delay(500);
}
/* USER CODE END 3 */
}
//-----------------------Module fsmc_ctrl-----------------------//
module fsmc_ctrl(
input clk_100m,
input rst_n,
input [23:16]ab,
inout [15:0]db,
input wr_n,
input rd_n,
input cs0,
input nadv,
output led_red,
output led_green,
output led_blue
);
wire wr,rd;
wire [15:0]out_data;
//-------------------------wr & rd-----------------------------//
assign wr = cs0 | wr_n;
assign rd = cs0 | rd_n;
//-------------------------address-----------------------------//
reg [23:0]address;
always@(posedge nadv or negedge rst_n)
if(!rst_n)
address <= 24'd0;
else
address <= {ab,db}; //锁存地址
//----------------------------clk------------------------------//
reg wr_clk1,wr_clk2;
always@(posedge clk_100m or negedge rst_n)
if(!rst_n)
begin
wr_clk1 <= 1'd1;
wr_clk2 <= 1'd2;
end
else
{wr_clk2,wr_clk1} <= {wr_clk1,wr};
wire clk = (!wr_clk2 | !rd);
assign db = !rd ? out_data:16'hzzzz;
//----------------------------ram------------------------------//
ram u1(
.address(address),
.clock(clk),
.data(db),
.wren(!wr),
.rden(!rd),
.q(out_data)
);
//----------------------------led_ctrl-------------------------//
reg led[2:0];
always@(posedge wr or negedge rst_n)
if(!rst_n)
begin
led[0] <= 1'd1;
led[1] <= 1'd0;
led[2] <= 1'd1;
end
else
begin
case(address) //映射寄存器地址
24'd10:led[0] <= db;
24'd11:led[1] <= db;
24'd12:led[2] <= db;
endcase
end
assign led_red = led[0];
assign led_green = led[1];
assign led_blue = led[2];
endmodule
源代码下载链接：
链接：http://pan.baidu.com/s/1nvkhPWl 密码：7x76
iCore4链接：
