view rvinterf/lowlevel/rviflcd.c @ 34:5ae8f6e55371

ringtools/examples: so-far-unsuccessful Melody E1 experiments
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 25 Oct 2016 08:17:07 +0000
parents e7502631a0f9
children a626f0ef542a
line wrap: on
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/*
 * 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;
u_char extlcd_invert;

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] ^ extlcd_invert,
			rxpkt[i] ^ extlcd_invert);
	fputc('\n', extlcd_pout);
	fflush(extlcd_pout);
}