µracoli Manual Version foo

- µracoli
- User Guide
- Reference Guide

xmpl_radio_stream.c

This example shows, how the avr-libc stdio facilities can be used to do a printf to the radio transceiver. The data printed to the transceiver can be watched on a terminal either with the wuart application or with xmpl_linbuf_rx.c.

/* Copyright (c) 2008 Axel Wachtler
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
* Neither the name of the authors nor the names of its contributors
may be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE. */
/* $Id$ */
/* Example use of the radio stream functions */
#include <stdio.h>
#include "board.h"
#include "hif.h"
#include "radio.h"
#include "xmpl.h"
#define PROMPT() PRINTF("\n\ruracoli[%02d]> ",lc++)
void incb(buffer_t *pbuf);
void outcb(buffer_t *pbuf);
buffer_stream_t Rstream;
uint8_t frame_header[] = {0x01, 0x80, 0, 0x11,0x22,0x33,0x44};
#define XMPL_FRAME_SIZE (40)
uint8_t ibuf[sizeof(buffer_t) + XMPL_FRAME_SIZE + 2];
uint8_t obuf[sizeof(buffer_t) + XMPL_FRAME_SIZE + 2];
//volatile buffer_t *pibuf;
int main(void)
{
uint8_t rxbuf[MAX_FRAME_SIZE];
uint8_t cnt = 0;
mcu_init();
/* setup buffers */
buffer_init(ibuf, sizeof(ibuf)-2, 0);
buffer_init(obuf, sizeof(obuf)-2, sizeof(frame_header));
/* setup buffer stream structure and stdio */
buffer_stream_init(&Rstream, &incb, &outcb);
/* todo add buffer assignment as parameters to buffer_stream_init! */
Rstream.pbufin = (buffer_t *)ibuf;
Rstream.pbufout = (buffer_t *)obuf;
stdout = stdin = &Rstream.bstream;
/* setup hardware */
LED_INIT();
radio_init(rxbuf, MAX_FRAME_SIZE);
radio_set_state(STATE_OFF);
radio_set_param(RP_CHANNEL(CHANNEL));
radio_set_param(RP_IDLESTATE(STATE_RX));
MCU_IRQ_ENABLE();
printf_P(PSTR("Hello World %d\n\r"),cnt++);
while(1)
{
WAIT_MS(10);
int c;
c = getchar();
if ( ('a' <= c) && (c <= 'z'))
{
printf_P(PSTR(":%c:\n\r"),c);
}
}
}
void outcb(buffer_t *pbuf)
{
static uint8_t frame_header[] = {0x01, 0x80, 0, 0x11,0x22,0x33,0x44};
char lastchar;
//LED_TOGGLE(0);
lastchar = BUFFER_LAST_CHAR(pbuf);
if ((BUFFER_FREE_AT_END(pbuf) < 1) || (lastchar == '\r'))
{
/* prepare send */
buffer_prepend_block(pbuf, frame_header, sizeof(frame_header));
radio_set_state(STATE_TX);
radio_send_frame(BUFFER_SIZE(pbuf)+ 2, BUFFER_PDATA(pbuf), 0);
/* clean buffer */
BUFFER_RESET(pbuf, sizeof(frame_header));
frame_header[2]++;
/* blink LED if done. */
//LED_TOGGLE(0);
}
}
void incb(buffer_t *pbuf)
{
uint8_t sz;
sz = BUFFER_SIZE(pbuf);
if (sz < 1)
{
/* buffer is now empty, free it. */
MCU_IRQ_DISABLE();
BUFFER_RESET(pbuf,0);
BUFFER_SET_UNLOCK(pbuf);
MCU_IRQ_ENABLE();
}
}
uint8_t * usr_radio_receive_frame(uint8_t len, uint8_t *frm, uint8_t lqi, int8_t ed, uint8_t crc)
{
uint16_t fctl;
uint8_t hlength;
LED_TOGGLE(1);
if ( BUFFER_IS_LOCKED(Rstream.pbufin) == false && crc == 0)
{
fctl = *(uint16_t*)frm;
/* copy the payload, reduced by the CRC bytes */
buffer_append_block(Rstream.pbufin, frm, len-2);
hlength = 3;
hlength += ((fctl & FCTL_DST_MASK) == FCTL_DST_LONG) ? 10:0;
hlength += ((fctl & FCTL_DST_MASK) == FCTL_DST_SHORT) ? 4:0;
hlength += ((fctl & FCTL_SRC_MASK) == FCTL_SRC_LONG) ? 10:0;
hlength += ((fctl & FCTL_SRC_MASK) == FCTL_SRC_SHORT) ? 4:0;
if (fctl & FCTL_IPAN_MASK)
{
hlength -= (fctl & FCTL_SRC_MASK) ? 2:0;
}
BUFFER_ADVANCE(Rstream.pbufin,hlength-1);
printf("rx=%d\n\r", BUFFER_SIZE(Rstream.pbufin));
BUFFER_SET_LOCK(Rstream.pbufin);
}
return frm;
}
/* XEOF */