verilog/dv/scan_controller_ext/scan_controller.c

/*
 * SPDX-FileCopyrightText: 2020 Efabless Corporation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * SPDX-License-Identifier: Apache-2.0
 */

#include <defs.h>
#include <stub.c>

#define SET(PIN,N) (PIN |=  (1<<N))
#define CLR(PIN,N) (PIN &= ~(1<<N))
#define GET(PIN,N) (PIN &   (1<<N))

#define FW_READY    12

void main()
{
	/* 
	IO Control Registers
	| DM     | VTRIP | SLOW  | AN_POL | AN_SEL | AN_EN | MOD_SEL | INP_DIS | HOLDH | OEB_N | MGMT_EN |
	| 3-bits | 1-bit | 1-bit | 1-bit  | 1-bit  | 1-bit | 1-bit   | 1-bit   | 1-bit | 1-bit | 1-bit   |

	Output: 0000_0110_0000_1110  (0x1808) = GPIO_MODE_USER_STD_OUTPUT
	| DM     | VTRIP | SLOW  | AN_POL | AN_SEL | AN_EN | MOD_SEL | INP_DIS | HOLDH | OEB_N | MGMT_EN |
	| 110    | 0     | 0     | 0      | 0      | 0     | 0       | 1       | 0     | 0     | 0       |
	
	 
	Input: 0000_0001_0000_1111 (0x0402) = GPIO_MODE_USER_STD_INPUT_NOPULL
	| DM     | VTRIP | SLOW  | AN_POL | AN_SEL | AN_EN | MOD_SEL | INP_DIS | HOLDH | OEB_N | MGMT_EN |
	| 001    | 0     | 0     | 0      | 0      | 0     | 0       | 0       | 0     | 1     | 0       |

	*/

    // 2 inputs for enable logic analyser control
	reg_mprj_io_8 =   GPIO_MODE_USER_STD_INPUT_NOPULL;
	reg_mprj_io_9 =   GPIO_MODE_USER_STD_INPUT_NOPULL;

    /*
    inputs                 (io_in[28:21]),
    outputs                (io_out[36:29]),
    ext_scan_clk       = inputs[0];
    ext_scan_data_in   = inputs[1];
    ext_scan_clk_in    = outputs[0]
    ext_scan_data_in   = outputs[1]
    ext_scan_select    = inputs[2];   
    ext_scan_latch_en  = inputs[3];

    assign outputs = driver_sel[1] ? aio_output_reg : {6'b0, ext_scan_data_in, ext_scan_clk_in};
    */

    reg_mprj_io_21 = GPIO_MODE_USER_STD_INPUT_NOPULL; // clk
    reg_mprj_io_22 = GPIO_MODE_USER_STD_INPUT_NOPULL; // data in
    reg_mprj_io_23 = GPIO_MODE_USER_STD_INPUT_NOPULL; // scan
    reg_mprj_io_24 = GPIO_MODE_USER_STD_INPUT_NOPULL; // latch

    reg_mprj_io_29 = GPIO_MODE_USER_STD_OUTPUT; // clk  out
    reg_mprj_io_30 = GPIO_MODE_USER_STD_OUTPUT; // data out

    // outputs for testbench control
    reg_mprj_io_12 = GPIO_MODE_MGMT_STD_OUTPUT; // fw ready

    /* Apply configuration */
    reg_mprj_xfer = 1;
    while (reg_mprj_xfer == 1);

	reg_mprj_datal |= 1 << FW_READY;
}