hello_world.c

//
// Author: Wolfgang Spraul
//
// This is free and unencumbered software released into the public domain.
// For details see the UNLICENSE file at the root of the source tree.
//

#include "model.h"
#include "floorplan.h"
#include "control.h"

/*
   This C design corresponds to the following Verilog:
  
   module ver_and(input a, b, output y);

   // synthesis attribute LOC a "P45"
   // synthesis attribute LOC b "P46"
   // synthesis attribute LOC y "P48 | IOSTANDARD = LVCMOS33 | SLEW = SLOW | DRIVE = 12"

    assign y = a & b;

   endmodule
*/

int main(int argc, char** argv)
{
	struct fpga_model model;
	int iob_inA_y, iob_inA_x, iob_inA_type_idx;
	int iob_inB_y, iob_inB_x, iob_inB_type_idx;
	int iob_out_y, iob_out_x, iob_out_type_idx;
	int logic_y, logic_x, logic_type_idx, rc;
	struct fpgadev_logic logic_cfg;
	net_idx_t inA_net, inB_net, out_net;

	fpga_build_model(&model, XC6SLX9, TQG144);

	fpga_find_iob(&model, "P45", &iob_inA_y, &iob_inA_x,
		&iob_inA_type_idx);
	fdev_iob_input(&model, iob_inA_y, iob_inA_x,
		iob_inA_type_idx, IO_LVCMOS33);

	fpga_find_iob(&model, "P46", &iob_inB_y, &iob_inB_x,
		&iob_inB_type_idx);
	fdev_iob_input(&model, iob_inB_y, iob_inB_x,
		iob_inB_type_idx, IO_LVCMOS33);

	fpga_find_iob(&model, "P48", &iob_out_y, &iob_out_x,
		&iob_out_type_idx);
	fdev_iob_output(&model, iob_out_y, iob_out_x,
		iob_out_type_idx, IO_LVCMOS33);

	logic_y = 68;
	logic_x = 13;
	logic_type_idx = DEV_LOG_X;

	CLEAR(logic_cfg);
	logic_cfg.a2d[LUT_D].flags |= OUT_USED | LUT6VAL_SET;
	if ((rc = bool_str2u64("A3*A5", &logic_cfg.a2d[LUT_D].lut6_val)))
		RC_FAIL(&model, rc);
	fdev_logic_setconf(&model, logic_y, logic_x, logic_type_idx, &logic_cfg);

	fnet_new(&model, &inA_net);
	fnet_add_port(&model, inA_net, iob_inA_y, iob_inA_x,
		DEV_IOB, iob_inA_type_idx, IOB_OUT_I);
	fnet_add_port(&model, inA_net, logic_y, logic_x, DEV_LOGIC,
		logic_type_idx, LI_D3);
	fnet_route(&model, inA_net);

	fnet_new(&model, &inB_net);
	fnet_add_port(&model, inB_net, iob_inB_y, iob_inB_x,
		DEV_IOB, iob_inB_type_idx, IOB_OUT_I);
	fnet_add_port(&model, inB_net, logic_y, logic_x, DEV_LOGIC,
		logic_type_idx, LI_D5);
	fnet_route(&model, inB_net);

	fnet_new(&model, &out_net);
	fnet_add_port(&model, out_net, logic_y, logic_x, DEV_LOGIC,
		logic_type_idx, LO_D);
	fnet_add_port(&model, out_net, iob_out_y, iob_out_x,
		DEV_IOB, iob_out_type_idx, IOB_IN_O);
	fnet_route(&model, out_net);

	write_floorplan(stdout, &model, FP_DEFAULT);
	return fpga_free_model(&model);
}