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DE10FanControl.bsv
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DE10FanControl.bsv
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package DE10FanControl;
import Fan::*;
import Temp::*;
import I2C::*;
import StmtFSM::*;
import Clocks::*;
interface FanControlIfc;
(* prefix = "FAN_I2C" *)
interface I2C_Pins fan_i2c;
(* prefix = "TEMP_I2C" *)
interface I2C_Pins temp_i2c;
(* always_enabled, always_ready *)
method Bit#(4) leds ();
(* always_enabled, always_ready *)
method Bit#(8) get_temp ();
(* always_enabled, always_ready *)
method Bit#(8) target_speed ();
interface Reset inner_rst;
endinterface
(* synthesize *)
module mkDE10FanControl(FanControlIfc);
Clock clk <- exposeCurrentClock;
MakeResetIfc r <- mkReset(1, True, clk);
FanControlInnerIfc inner <- mkDE10FanInner(reset_by r.new_rst);
interface I2C_Pins fan_i2c = inner.fan_i2c;
interface I2C_Pins temp_i2c = inner.temp_i2c;
method Bit#(4) leds() = inner.leds;
method Bit#(8) get_temp() = inner.get_temp;
method Bit#(8) target_speed() = inner.target_speed();
interface Reset inner_rst = r.new_rst;
endmodule
interface FanControlInnerIfc;
(* prefix = "FAN_I2C" *)
interface I2C_Pins fan_i2c;
(* prefix = "TEMP_I2C" *)
interface I2C_Pins temp_i2c;
(* always_enabled, always_ready *)
method Bit#(4) leds ();
(* always_enabled, always_ready *)
method Bit#(8) get_temp ();
(* always_enabled, always_ready *)
method Bit#(8) target_speed ();
endinterface
module mkDE10FanInner (FanControlInnerIfc);
Reg#(Bit#(4)) led <- mkReg(4'hF);
Reg#(Bit#(8)) cur_temp <- mkReg(0);
Reg#(Bit#(8)) last_temp <- mkReg(0);
Reg#(Bit#(8)) tSpeed <- mkReg(35);
Bit#(8) target_ktach = truncate((12'd992 * 4) / extend(tSpeed)) - 1;
Reg#(Bit#(32)) cnt <- mkReg(100000000);
Fan fan <- mkFan(7'b1001000);
Temp temp <- mkTemp(7'b0011100);
PulseWire pw <- mkPulseWire;
(* fire_when_enabled, no_implicit_conditions *)
rule counter (cnt > 0);
cnt <= cnt-1;
endrule
(* fire_when_enabled, no_implicit_conditions *)
rule counter_rst (cnt == 0 && pw);
cnt <= 250000000;
endrule
Stmt test =
seq
led <= 0;
await(cnt == 0);
led <= 1;
fan.init(ClosedLoop, Div4);
temp.init();
fan.set_speed(target_ktach);
led <= 2;
while(True) seq
led <= 4;
last_temp <= cur_temp;
temp.read_val(cur_temp);
if( cur_temp < 40 && cur_temp <= last_temp) seq
if( tSpeed > 35 ) seq
tSpeed <= tSpeed - 5;
fan.set_speed(target_ktach);
endseq
endseq
if( cur_temp > 40 && cur_temp >= last_temp) seq
if( tSpeed < 100 ) seq
tSpeed <= tSpeed + 5;
fan.set_speed(target_ktach);
endseq
endseq
pw.send();
led <= 8;
await(cnt == 0);
endseq
endseq;
FSM main <- mkFSM( test );
rule run_main;
main.start();
endrule
interface I2C_Pins fan_i2c = fan.i2c;
interface I2C_Pins temp_i2c = temp.i2c;
method Bit#(4) leds();
return led;
endmethod
method Bit#(8) get_temp();
return cur_temp;
endmethod
method Bit#(8) target_speed();
return tSpeed;
endmethod
endmodule
endpackage: DE10FanControl