pshid_.nsl | Codetter（こーどったー）

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declare pshid {
    output hid_clock, hid_select, hid_command;
    input hid_data, hid_ack;
    output hid_button[16];
}
module pshid {
//#define COUNT (32'd48_000_000 / 32'd250_000)
    reg clock_count[8] = 0xb8;
    reg reg_clock, reg_command;
    reg reg_select = 1;
    reg senddata[8];
    reg reg_button[16];
    proc_name hid_main();
    proc_name serial_access;
    func_self serial_access_go; // 追加
 
    hid_clock = reg_clock;
    hid_command = reg_command;
    hid_select = reg_select;
    hid_button = reg_button;
 
    if(clock_count == 0){
        hid_main();
    serial_access();
    }
 
    any{
        clock_count < 95: clock_count := clock_count + 1;
        else: clock_count := 0;
    }
 
    proc serial_access{
        reg bitcount[3] = 0;
        reg reg_data[8];
        state_name INIT, SEND_LOW, SEND_HIGH, READ;
    finish;
    state INIT {
        if(serial_access_go) goto SEND_LOW;
    }
        state SEND_LOW{
            //if(clock_count == 0){
                reg_clock := 0;
                reg_command := senddata[0];
                goto SEND_HIGH;
            //}
        }
        state SEND_HIGH{
            //if(clock_count == 0){
                reg_clock := 1;
                reg_data := {hid_data, reg_data[7:1]};
                if(bitcount < 7){
                    senddata := senddata >> 1;
                    bitcount := bitcount + 1;
                }else{
                    bitcount := 0;
                    goto INIT;
                }
            //}
        }
    }
 
    proc hid_main{
        state_name SEND_01, SEND_42, RECEIVE_5A, GET_SW1, GET_SW2, GET_SW3, IDLE;
        finish;
        state SEND_01{
            reg_select := 0;
            senddata := 8'h01;
            serial_access_go();
            goto SEND_42;
        }
        state SEND_42{
            if(hid_ack == 1'b1){
                senddata := 8'h42;
                serial_access_go(); //return 41
                goto RECEIVE_5A;
            }
        }
        state RECEIVE_5A{
            if(hid_ack == 1'b0){
                senddata := 8'h00;
                serial_access_go(); //return 5a
                goto GET_SW1;
            }
        }
        state GET_SW1{
            if(hid_ack == 1'b0){
                senddata := 8'h00;
                serial_access_go();
                goto GET_SW2;
            }
        }
        state GET_SW2{
            if(hid_ack == 1'b0){
                reg_button := {8'h00, reg_data};
                senddata := 8'h00;
                serial_access_go();
                goto GET_SW3;
            }
        }
        state GET_SW3{
            if(hid_ack == 1'b0){
                reg_button := {reg_button[7:0], reg_data};
                reg_select := 1;
                goto IDLE;
            }
        }
    }
 
}
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