486 lines
16 KiB
C
486 lines
16 KiB
C
/* Copyright (c) 2008, Swedish Institute of Computer Science
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* All rights reserved.
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of the copyright holders nor the names of
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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/** \addtogroup raven
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* @{
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*/
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/**
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* \defgroup ravenserial Serial interface between Raven processors
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*
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* \brief This module contains code to interface a Contiki-based
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* project on the AVR Raven platform's ATMega1284P chip to the LCD
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* driver chip (ATMega3290P) on the Raven.
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*
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* \author Blake Leverett <bleverett@gmail.com>
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*
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* @{
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*/
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/**
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* \file
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* This file contains code to connect the two AVR Raven processors via a serial connection.
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*
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*/
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#define DEBUG 0 //Making this 1 will slightly alter command timings
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#if DEBUG
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#define PRINTF(FORMAT,args...) printf_P(PSTR(FORMAT),##args)
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#else
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#define PRINTF(...)
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#endif
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#define DEBUGSERIAL 0 //Making this 1 will significantly alter command timings
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#include "contiki.h"
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#include "contiki-lib.h"
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#include "contiki-net.h"
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#if AVR_WEBSERVER
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#include "webserver-nogui.h"
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#include "httpd-cgi.h"
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#endif
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#include "raven-lcd.h"
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#include <string.h>
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#include <stdio.h>
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#include <avr/pgmspace.h>
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#include <avr/eeprom.h>
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#include <avr/sleep.h>
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#include <dev/watchdog.h>
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static uint8_t count = 0;
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static uint8_t seqno;
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uip_ipaddr_t dest_addr;
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#define MAX_CMD_LEN 20
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static struct{
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uint8_t frame[MAX_CMD_LEN];
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uint8_t ndx;
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uint8_t len;
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uint8_t cmd;
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uint8_t done;
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} cmd;
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#define UIP_IP_BUF ((struct uip_ip_hdr *)&uip_buf[UIP_LLH_LEN])
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#define UIP_ICMP_BUF ((struct uip_icmp_hdr *)&uip_buf[uip_l2_l3_hdr_len])
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#define PING6_DATALEN 16
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void rs232_send(uint8_t port, unsigned char c);
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/*---------------------------------------------------------------------------*/
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/* Sends a ping packet out the radio */
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/* Useful for debugging so allow external calls */
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void
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raven_ping6(void)
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{
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#define PING_GOOGLE 0
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UIP_IP_BUF->vtc = 0x60;
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UIP_IP_BUF->tcflow = 1;
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UIP_IP_BUF->flow = 0;
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UIP_IP_BUF->proto = UIP_PROTO_ICMP6;
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UIP_IP_BUF->ttl = uip_ds6_if.cur_hop_limit;
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#if PING_GOOGLE
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if (seqno==1) {
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uip_ipaddr_copy(&UIP_IP_BUF->destipaddr, uip_ds6_defrt_choose()); //the default router
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} else if (seqno==2) {
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uip_ip6addr(&UIP_IP_BUF->destipaddr,0x2001,0x4860,0x800f,0x0000,0x0000,0x0000,0x0000,0x0093); //ipv6.google.com
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} else if (seqno==3) {
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uip_ipaddr_copy(&UIP_IP_BUF->destipaddr, uip_ds6_defrt_choose()); //the default router
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} else {
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// uip_ip6addr(&UIP_IP_BUF->destipaddr,0x2001,0x0420,0x5FFF,0x007D,0x02D0,0xB7FF,0xFE23,0xE6DB); //?.cisco.com
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uip_ip6addr(&UIP_IP_BUF->destipaddr,0x2001,0x0420,0x0000,0x0010,0x0250,0x8bff,0xfee8,0xf800); //six.cisco.com
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}
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#else
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uip_ipaddr_copy(&UIP_IP_BUF->destipaddr, uip_ds6_defrt_choose()); //the default router
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#endif
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uip_ds6_select_src(&UIP_IP_BUF->srcipaddr, &UIP_IP_BUF->destipaddr);
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UIP_ICMP_BUF->type = ICMP6_ECHO_REQUEST;
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UIP_ICMP_BUF->icode = 0;
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/* set identifier and sequence number to 0 */
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memset((void *)UIP_ICMP_BUF + UIP_ICMPH_LEN, 0, 4);
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/* put one byte of data */
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memset((void *)UIP_ICMP_BUF + UIP_ICMPH_LEN + UIP_ICMP6_ECHO_REQUEST_LEN,
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count, PING6_DATALEN);
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uip_len = UIP_ICMPH_LEN + UIP_ICMP6_ECHO_REQUEST_LEN + UIP_IPH_LEN + PING6_DATALEN;
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UIP_IP_BUF->len[0] = (uint8_t)((uip_len - 40) >> 8);
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UIP_IP_BUF->len[1] = (uint8_t)((uip_len - 40) & 0x00FF);
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UIP_ICMP_BUF->icmpchksum = 0;
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UIP_ICMP_BUF->icmpchksum = ~uip_icmp6chksum();
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tcpip_ipv6_output();
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}
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/*---------------------------------------------------------------------------*/
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/* Send a serial command frame to the ATMega3290 Processsor on Raven via serial port */
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static void
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send_frame(uint8_t cmd, uint8_t len, uint8_t *payload)
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{
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uint8_t i;
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rs232_send(0, SOF_CHAR); /* Start of Frame */
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rs232_send(0, len);
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rs232_send(0, cmd);
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for (i=0;i<len;i++)
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rs232_send(0,*payload++);
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rs232_send(0, EOF_CHAR);
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}
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char serial_char_received;
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/*---------------------------------------------------------------------------*/
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/* Sleep for howlong seconds, or until UART interrupt if howlong==0.
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* Uses TIMER2 with external 32768 Hz crystal to sleep in 1 second multiples.
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* TIMER2 may have already been set up for CLOCK_CONF_SECOND ticks/second in clock.c
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*
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* Until someone figures out how to get UART to wake from powerdown,
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* a three second powersave cycle is used with exit based on any character received.
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* The system clock is adjusted to reflect the sleep time.
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*/
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void micro_sleep(uint8_t howlong)
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{
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uint8_t saved_sreg = SREG, saved_howlong = howlong;
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#if AVR_CONF_USE32KCRYSTAL
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/* Save TIMER2 configuration if clock.c is using it */
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uint8_t savedTCNT2=TCNT2, savedTCCR2A=TCCR2A, savedTCCR2B = TCCR2B, savedOCR2A = OCR2A;
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#endif
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// if (howlong==0) {
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// set_sleep_mode(SLEEP_MODE_PWR_DOWN); // UART can't wake from powerdown
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// } else {
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set_sleep_mode(SLEEP_MODE_PWR_SAVE); // Sleep for howlong seconds
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if (howlong==0) howlong=3; // 3*32/(32768/1024) = 3 second sleep cycle if not specified
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cli(); // Disable interrupts for the present
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ASSR |= (1 << AS2); // Set TIMER2 asyncronous from external crystal
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TCCR2A =(1<<WGM21); // CTC mode
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TCCR2B =((1<<CS22)|(1<<CS21)|(1<<CS20));// Prescale by 1024 = 32 ticks/sec
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// while(ASSR & (1 << TCR2BUB)); // Wait for TCNT2 write to finish.
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OCR2A = howlong*32; // Set TIMER2 output compare register
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// while(ASSR & (1 << OCR2AUB)); // Wait for OCR2 write to finish.
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SREG = saved_sreg; // Restore interrupt state.
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// UCSR(USART,B)&= ~(1<<RXCIE(USART)) // Disable the RX Complete interrupt;
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// UCSR0B|=(1<<RXCIE0); // Enable UART0 RX complete interrupt
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// UCSR1B|=(1<<RXCIE1); // Enable UART1 RX complete interrupt
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// TCNT2 = 0; // Reset TIMER2 timer counter value.
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// while(ASSR & (1 << TCN2UB)); // Wait for TCNT2 write to finish before entering sleep.
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// TIMSK2 |= (1 << OCIE2A); // Enable TIMER2 output compare interrupt.
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// }
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TCNT2 = 0; // Reset timer
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watchdog_stop(); // Silence annoying distractions
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while(ASSR & (1 << TCN2UB)); // Wait for TCNT2 write to (which assures TCCR2x and OCR2A are finished!)
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TIMSK2 |= (1 << OCIE2A); // Enable TIMER2 output compare interrupt
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SMCR |= (1 << SE); // Enable sleep mode.
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while (1) {
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// TCNT2 = 0; // Cleared automatically in CTC mode
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// while(ASSR & (1 << TCN2UB)); // Wait for TCNT2 write to finish before entering sleep.
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serial_char_received=0; // Set when chars received by UART
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sleep_mode(); // Sleep
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/* Adjust clock.c for the time spent sleeping */
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clock_adjust_ticks(howlong * CLOCK_SECOND);
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// if (TIMSK2&(1<<OCIE2A)) break; // Exit sleep if not awakened by TIMER2
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PRINTF(".");
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if (saved_howlong) break; // Exit sleep if nonzero time specified
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// PRINTF("%d",serial_char_received);
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if (serial_char_received) break;
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}
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SMCR &= ~(1 << SE); //Disable sleep mode after wakeup
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#if AVR_CONF_USE32KCRYSTAL
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/* Restore clock.c configuration */
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// OCRSetup();
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cli();
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TCCR2A = savedTCCR2A;
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TCCR2B = savedTCCR2B;
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OCR2A = savedOCR2A;
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TCNT2 = savedTCNT2;
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sei();
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#else
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TIMSK2 &= ~(1 << OCIE2A); //Disable TIMER2 interrupt
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#endif
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watchdog_start();
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}
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#if !AVR_CONF_USE32KCRYSTAL
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/*---------------------------------------------------------------------------*/
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/* TIMER2 Interrupt service */
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ISR(TIMER2_COMPA_vect)
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{
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// TIMSK2 &= ~(1 << OCIE2A); //Just one interrupt needed for waking
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}
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#endif /* !AVR_CONF_USE32KCRYSTAL */
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#if DEBUGSERIAL
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uint8_t serialcount;
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char dbuf[30];
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#endif
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/*---------------------------------------------------------------------------*/
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static uint8_t
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raven_gui_loop(process_event_t ev, process_data_t data)
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{
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uint8_t i,activeconnections,radio_state;
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// PRINTF("\nevent %d ",ev);
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#if DEBUGSERIAL
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printf_P(PSTR("Buffer [%d]="),serialcount);
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serialcount=0;
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for (i=0;i<30;i++) {
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printf_P(PSTR(" %d"),dbuf[i]);
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dbuf[i]=0;
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}
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#endif
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if(ev == tcpip_icmp6_event) switch(*((uint8_t *)data)) {
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// case ICMP6_NS:
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/*Tell the 3290 we are being solicited. */
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// send_frame(REPORT_NS,...);
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// break; //fall through for beep
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// case ICMP6_RA:
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/*Tell the 3290 we have a router. */
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// send_frame(REPORT_NA,...);
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// break; //fall through for beep
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case ICMP6_ECHO_REQUEST:
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/* We have received a ping request over the air. Tell the 3290 */
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send_frame(REPORT_PING_BEEP, 0, 0);
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break;
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case ICMP6_ECHO_REPLY:
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/* We have received a ping reply over the air. Send frame back to 3290 */
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send_frame(REPORT_PING, 1, &seqno);
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break;
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} else switch (ev) {
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case SERIAL_CMD:
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/* Check for command from serial port, execute it. */
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/* Note cmd frame is written in an interrupt - delays here can cause overwriting by next command */
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PRINTF("\nCommand %d length %d done %d",cmd.cmd,cmd.len,cmd.done);
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if (cmd.done){
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/* Execute the waiting command */
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switch (cmd.cmd){
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case SEND_PING:
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/* Send ping request over the air */
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seqno = cmd.frame[0];
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raven_ping6();
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break;
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case SEND_TEMP:
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#if AVR_WEBSERVER
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/* Set temperature string in web server */
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web_set_temp((char *)cmd.frame);
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#endif
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break;
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case SEND_ADC2:
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#if AVR_WEBSERVER
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/* Set ext voltage string in web server */
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web_set_voltage((char *)cmd.frame);
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#endif
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break;
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case SEND_SLEEP:
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/* Sleep radio and 1284p. */
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if (cmd.frame[0]==0) { //Time to sleep in seconds
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/* Unconditional sleep. Don't wake until a serial interrupt. */
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} else {
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/* Sleep specified number of seconds (3290p "DOZE" mode) */
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/* It sleeps a bit longer so we will be always be awake for the next sleep command. */
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#if UIP_CONF_TCP
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/* Only sleep this cycle if no active TCP/IP connections, for fast browser responsed */
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activeconnections=0;
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for(i = 0; i < UIP_CONNS; ++i) {
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if((uip_conns[i].tcpstateflags & UIP_TS_MASK) != UIP_CLOSED) activeconnections++;
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}
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if (activeconnections) {
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PRINTF("\nWaiting for %d connections",activeconnections);
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break;
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}
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#endif
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}
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radio_state = NETSTACK_RADIO.off();
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PRINTF ("\nsleep %d radio state %d...",cmd.frame[0],radio_state);
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/*Sleep for specified time*/
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PRINTF("\nSleeping...");
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micro_sleep(cmd.frame[0]);
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radio_state = NETSTACK_RADIO.on();
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if (radio_state > 0) {
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PRINTF("Awake!");
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} else {
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PRINTF("Radio wake error %d\n",radio_state);
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}
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break;
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case SEND_WAKE:
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/* 3290p requests return message showing awake status */
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send_frame(REPORT_WAKE, 0, 0);
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break;
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default:
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break;
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}
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/* Reset command done flag. */
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cmd.done = 0;
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}
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break;
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default:
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break;
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}
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return 0;
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}
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/*---------------------------------------------------------------------------*/
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/* Process an input character from serial port.
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* ** This is called from an ISR!!
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*/
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int raven_lcd_serial_input(unsigned char ch)
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{
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/* Tell sleep routine if a reception occurred */
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/* Random nulls occur for some reason, so ignore those */
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if (ch) serial_char_received++;
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#if DEBUGSERIAL
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if (serialcount<25) dbuf[serialcount]=ch;
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serialcount++;
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#endif
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/* Don't overwrite an unprocessed command */
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// if (cmd.done) return 0;
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/* Parse frame, */
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switch (cmd.ndx){
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case 0:
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/* first byte, must be 0x01 */
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if (ch == 0x01){
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// cmd.done = false;
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} else {
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#if DEBUGSERIAL
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dbuf[25]++;
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#endif
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return 0;
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}
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break;
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case 1:
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/* Second byte, length of payload */
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cmd.len = ch;
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break;
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case 2:
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/* Third byte, command byte */
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cmd.cmd = ch;
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break;
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default:
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/* Payload and ETX */
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if (cmd.ndx >= (MAX_CMD_LEN+3)) { //buffer overflow!
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cmd.ndx=0;
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#if DEBUGSERIAL
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dbuf[26]++;
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#endif
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return 0;
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}
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if (cmd.ndx >= cmd.len+3){
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/* all done, check ETX */
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if (ch == 0x04){
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cmd.done = 1;
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#if DEBUGSERIAL
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dbuf[27]++;
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#endif
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process_post(&raven_lcd_process, SERIAL_CMD, 0);
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} else {
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/* Failed ETX */
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#if DEBUGSERIAL
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dbuf[28]++;
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#endif
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}
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cmd.ndx=0; //set up for next command
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return 0;
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} else {
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/* Just grab and store payload */
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cmd.frame[cmd.ndx - 3] = ch;
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}
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break;
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}
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cmd.ndx++;
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return 0;
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}
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/*---------------------------------------------------------------------------*/
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void
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raven_lcd_show_text(char *text) {
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uint8_t textlen=strlen(text)+1;
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if (textlen > MAX_CMD_LEN) textlen=MAX_CMD_LEN;
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send_frame(REPORT_TEXT_MSG, textlen, (uint8_t *) text);
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}
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#if AVR_WEBSERVER
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static void
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lcd_show_servername(void) {
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//extern uint8_t eemem_mac_address[8]; //These are defined in httpd-fsdata.c via makefsdata.h
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extern uint8_t eemem_server_name[16];
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//extern uint8_t eemem_domain_name[30];
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char buf[sizeof(eemem_server_name)+1];
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eeprom_read_block (buf,eemem_server_name, sizeof(eemem_server_name));
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buf[sizeof(eemem_server_name)]=0;
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raven_lcd_show_text(buf); //must fit in all the buffers or it will be truncated!
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}
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#endif
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/*---------------------------------------------------------------------------*/
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PROCESS(raven_lcd_process, "Raven LCD interface process");
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PROCESS_THREAD(raven_lcd_process, ev, data)
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{
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PROCESS_BEGIN();
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#if AVR_WEBSERVER
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lcd_show_servername();
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#endif
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/* Get ICMP6 callbacks from uip6 stack, perform 3290p action on pings, responses, etc. */
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if(icmp6_new(NULL) == 0) {
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while(1) {
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|
PROCESS_YIELD();
|
|
// if (ev != ?) //trap frequent strobes?
|
|
raven_gui_loop(ev, data);
|
|
}
|
|
}
|
|
PROCESS_END();
|
|
}
|
|
|
|
/** @} */
|
|
/** @} */
|