ben-blinkenlights/lpc111x-isp/lpc111x.c

/*
 * lpc111x-isp/lpc111x.c - LPC111x/LPC11Cxx ISP programmer
 *
 * Written 2012 by Werner Almesberger
 * Copyright 2012 Werner Almesberger
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */


#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <termios.h>
#include <fcntl.h>
#include <errno.h>

#include <ubb/ubb.h>
#include <ubb/swuart.h>


#define	TGT_nRESET	UBB_CMD
#define	TGT_nISP	UBB_DAT1
#define	TGT_TX		UBB_DAT3
#define	TGT_RX		UBB_DAT2

#define	HOST_RX		TGT_TX
#define	HOST_TX		TGT_RX


static void dump(uint8_t *s, int len)
{
	const uint8_t *end = s+len;

	for (end = s+len; s != end; s++) {
		if (*s >= ' ' && *s <= '~')
			printf("%c", *s);
		else if (*s == 10)
			printf(s+1 == end ? "\n" : "\\n");
		else if (*s == 13)
			;
		else
			printf("\\%02o", *s);
	}
	if (len && end[-1] != '\n')
		printf("...\n");
}


static void at_exit(void)
{
	ubb_close(0);
}


int main(int argc, char **argv)
{
	uint8_t reply[1000];
	int got;

	if (ubb_open(0) < 0) {
		perror("ubb_open");
		exit(1);
	}
	atexit(at_exit);

	ubb_power(1);

	usleep(100*1000);

	SET(TGT_nRESET);
	OUT(TGT_nRESET);

	CLR(TGT_nISP);
	OUT(TGT_nISP);

	swuart_open(HOST_TX, HOST_RX, 115200);

	CLR(TGT_nRESET);
	usleep(10);	/* DS Table 9 pg 29 says min 50 ns */
	SET(TGT_nRESET);

	usleep(5*1000);	/* UM 26.3.1 pg 408 says max 3 ms */

	got = swuart_trx("?", 1, reply, sizeof(reply), 1000, 100);
	dump(reply, got);

	got = swuart_trx("Synchronized\r\n", 14,
	    reply, sizeof(reply), 1000, 100);
	dump(reply, got);

	got = swuart_trx("12000\r\n", 7,
	    reply, sizeof(reply), 1000, 100);
	dump(reply, got);

	got = swuart_trx("J\r\n", 7,
	    reply, sizeof(reply), 1000, 100);
	dump(reply, got);

	return 0;
}