view rvinterf/lowlevel/rviflcd.c @ 624:7485e75d9477

srec-regions: removed unnecessary prohibition against address going backward
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 27 Feb 2020 08:12:11 +0000
parents a626f0ef542a
children
line wrap: on
line source

/*
 * This rvinterf module implements the piping of LCD output to fc-lcdemu
 */

#include <sys/types.h>
#include <stdio.h>
#include <string.h>
#include <strings.h>
#include <stdlib.h>
#include <unistd.h>

extern u_char rxpkt[];
extern size_t rxpkt_len;

char *extlcd_program;
FILE *extlcd_pout;

void
open_extlcd_pipe()
{
	extlcd_pout = popen(extlcd_program, "w");
	if (!extlcd_pout) {
		perror(extlcd_program);
		exit(1);
	}
}

void
output_to_extlcd()
{
	int i;

	fprintf(extlcd_pout, "%u %u ", rxpkt[1], rxpkt[2]);
	for (i = 3; i < rxpkt_len; i += 2)
		fprintf(extlcd_pout, "%02X%02X", rxpkt[i+1] ^ 0xFF,
			rxpkt[i] ^ 0xFF);
	fputc('\n', extlcd_pout);
	fflush(extlcd_pout);
}