?? eeprom_wr.v
字號:
begin
ACK <= 1;
FF <= 0;
main_state <= Ackn;
end
Ackn:
begin
ACK <= 0;
WF <= 0;
RF <= 0;
main_state <= Idle;
end
default: main_state <= Idle;
endcase
end
//------------------------串行數據轉換為并行數據任務----------------------------------
task shift8in;
begin
casex(sh8in_state)
sh8in_begin:
sh8in_state <= sh8in_bit7;
sh8in_bit7: if(SCL)
begin
data_from_rm[7] <= SDA;
sh8in_state <= sh8in_bit6;
end
else
sh8in_state <= sh8in_bit7;
sh8in_bit6: if(SCL)
begin
data_from_rm[6] <= SDA;
sh8in_state <= sh8in_bit5;
end
else
sh8in_state <= sh8in_bit6;
sh8in_bit5: if(SCL)
begin
data_from_rm[5] <= SDA;
sh8in_state <= sh8in_bit4;
end
else
sh8in_state <= sh8in_bit5;
sh8in_bit4: if(SCL)
begin
data_from_rm[4] <= SDA;
sh8in_state <= sh8in_bit3;
end
else
sh8in_state <= sh8in_bit4;
sh8in_bit3: if(SCL)
begin
data_from_rm[3] <= SDA;
sh8in_state <= sh8in_bit2;
end
else
sh8in_state <= sh8in_bit3;
sh8in_bit2: if(SCL)
begin
data_from_rm[2] <= SDA;
sh8in_state <= sh8in_bit1;
end
else
sh8in_state <= sh8in_bit2;
sh8in_bit1: if(SCL)
begin
data_from_rm[1] <= SDA;
sh8in_state <= sh8in_bit0;
end
else
sh8in_state <= sh8in_bit1;
sh8in_bit0: if(SCL)
begin
data_from_rm[0] <= SDA;
sh8in_state <= sh8in_end;
end
else
sh8in_state <= sh8in_bit0;
sh8in_end: if(SCL)
begin
link_read <= YES;
FF <= 1;
sh8in_state <= sh8in_bit7;
end
else
sh8in_state <= sh8in_end;
default: begin
link_read <= NO;
sh8in_state <= sh8in_bit7;
end
endcase
end
endtask
//------------------------------ 并行數據轉換為串行數據任務 ---------------------------
task shift8_out;
begin
casex(sh8out_state)
sh8out_bit7:
if(!SCL)
begin
link_sda <= YES;
link_write <= YES;
sh8out_state <= sh8out_bit6;
end
else
sh8out_state <= sh8out_bit7;
sh8out_bit6:
if(!SCL)
begin
link_sda <= YES;
link_write <= YES;
sh8out_state <= sh8out_bit5;
sh8out_buf <= sh8out_buf<<1;
end
else
sh8out_state <= sh8out_bit6;
sh8out_bit5:
if(!SCL)
begin
sh8out_state <= sh8out_bit4;
sh8out_buf <= sh8out_buf<<1;
end
else
sh8out_state <= sh8out_bit5;
sh8out_bit4:
if(!SCL)
begin
sh8out_state <= sh8out_bit3;
sh8out_buf <= sh8out_buf<<1;
end
else
sh8out_state <= sh8out_bit4;
sh8out_bit3:
if(!SCL)
begin
sh8out_state <= sh8out_bit2;
sh8out_buf <= sh8out_buf<<1;
end
else
sh8out_state <= sh8out_bit3;
sh8out_bit2:
if(!SCL)
begin
sh8out_state <= sh8out_bit1;
sh8out_buf <= sh8out_buf<<1;
end
else
sh8out_state <= sh8out_bit2;
sh8out_bit1:
if(!SCL)
begin
sh8out_state <= sh8out_bit0;
sh8out_buf <= sh8out_buf<<1;
end
else
sh8out_state <= sh8out_bit1;
sh8out_bit0:
if(!SCL)
begin
sh8out_state <= sh8out_end;
sh8out_buf <= sh8out_buf<<1;
end
else
sh8out_state <= sh8out_bit0;
sh8out_end:
if(!SCL)
begin
link_sda <= NO;
link_write <= NO;
FF <= 1;
end
else
sh8out_state <= sh8out_end;
endcase
end
endtask
//--------------------------- 輸出啟動信號任務 ---------------------------------
task shift_head;
begin
casex(head_state)
head_begin:
if(!SCL)
begin
link_write <= NO;
link_sda <= YES;
link_head <= YES;
head_state <= head_bit;
end
else
head_state <= head_begin;
head_bit:
if(SCL)
begin
FF <= 1;
head_buf <= head_buf<<1;
head_state <= head_end;
end
else
head_state <= head_bit;
head_end:
if(!SCL)
begin
link_head <= NO;
link_write <= YES;
end
else
head_state <= head_end;
endcase
end
endtask
//--------------------------- 輸出停止信號任務 --------------------------------------
task shift_stop;
begin
casex(stop_state)
stop_begin: if(!SCL)
begin
link_sda <= YES;
link_write <= NO;
link_stop <= YES;
stop_state <= stop_bit;
end
else
stop_state <= stop_begin;
stop_bit: if(SCL)
begin
stop_buf <= stop_buf<<1;
stop_state <= stop_end;
end
else
stop_state<= stop_bit;
stop_end: if(!SCL)
begin
link_head <= NO;
link_stop <= NO;
link_sda <= NO;
FF <= 1;
end
else
stop_state <= stop_end;
endcase
end
endtask
endmodule
//--------------------------- eeprom_wr.v 文件結束---------------------------
?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -