renamed (see PCB)
This commit is contained in:
Michael Waiblinger
parent
662f9f3a60
commit
2e39a91a0b
279
src/CANNode.cpp
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279
src/CANNode.cpp
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#include <Arduino.h>
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// -------------------------------------------------------------
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// CANNode for Teensy 3.1/3.2
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//
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// by wiebel
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//
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#include <Metro.h>
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#include <FlexCAN.h>
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#include <OneWire.h>
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#include "CANNode.h"
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// Configuration
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// Misc
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#define N_EVENTS 64 // size of events array
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#define N_SWITCHES 64 // size of switch array
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#define DEBUG 0 // 1 for noisy serial
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#define LED 13
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// Metro ticks in ms
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#define METRO_CAN_tick 1
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#define METRO_OW_read_tick 20
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#define METRO_OW_search_tick 10000
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// CAN bus
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#define CAN_speed 125000
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#define CAN_RS_PIN 2 //
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// OneWire
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#define OW_pin 14
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#define TEST_ADDR "125B275000000026"
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#define DS2406_FAMILY 0x12
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#define DS2406_WRITE_STATUS 0x55
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#define DS2406_READ_STATUS 0xaa
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#define DS2406_CHANNEL_ACCESS 0xf5
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#define DS2406_CHANNEL_CONTROL1 0x4c // 01001100 - Read Both Pins
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#define DS2406_CHANNEL_CONTROL2 0xff // for future dev
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#define SKIP_ROM 0xCC
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#define PIO_A 0x20
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#define PIO_B 0x40
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#define DS2406_BUF_LEN 10
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// Definitions
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static OW_switch_t switches[N_SWITCHES];
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static event_t events[N_EVENTS];
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// Initialisation
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// Misc
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#if DEBUG
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#define DEBUG_PRINT(a) Serial.print(a)
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#define DEBUG_WRITE(a) Serial.write(a)
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#else
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#define DEBUG_PRINT(a)
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#define DEBUG_WRITE(a)
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#endif /* DEBUG */
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int led = LED;
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// Metro
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Metro METRO_CAN = Metro(METRO_CAN_tick);
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Metro METRO_OW_read = Metro(METRO_OW_read_tick);
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Metro METRO_OW_search = Metro(METRO_OW_search_tick);
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// CAN bus
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FlexCAN CANbus(CAN_speed);
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// OneWire
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uint8_t addr[8];
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uint8_t buffer[DS2406_BUF_LEN];
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uint8_t readout,trig_event,event_idx,tmp;
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OneWire OW_1(OW_pin);
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static CAN_message_t txmsg,rxmsg;
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static uint8_t hex[17] = "0123456789abcdef";
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int txCount,rxCount;
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unsigned int txTimer,rxTimer;
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// Functions -------------------------------------------------------
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void PrintBytes(uint8_t* addr, uint8_t count, bool newline=0) {
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for (uint8_t i = 0; i < count; i++) {
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Serial.print(addr[i]>>4, HEX);
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Serial.print(addr[i]&0x0f, HEX);
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}
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if (newline)
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Serial.println();
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}
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void DEBUG_Bytes(uint8_t* addr, uint8_t count, bool newline=0) {
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#if DEBUG
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for (uint8_t i = 0; i < count; i++) {
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Serial.print(addr[i]>>4, HEX);
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Serial.print(addr[i]&0x0f, HEX);
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}
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if (newline)
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Serial.println();
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#endif
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}
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void print_OW_Device(uint8_t *addr) {
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for(int i = 0; i < 8; i++) {
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if(i != 0) {
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Serial.print(":");
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}
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Serial.print(addr[i], HEX);
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}
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}
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uint8_t read_DS2406(uint8_t* addr) {
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// We're using a temporary switch object here only because we're
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// discovering them dynamically. Depending on your app, you may
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// already know the serial number of the device you intend to
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// control and will use it there.
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OW_1.reset();
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OW_1.select(addr);
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OW_1.write(DS2406_CHANNEL_ACCESS,1);
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OW_1.write(DS2406_CHANNEL_CONTROL1,1);
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OW_1.write(DS2406_CHANNEL_CONTROL2,1);
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tmp = OW_1.read();
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OW_1.reset();
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#if DEBUG
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PrintBytes(&tmp,1,1);
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#endif /* DEBUG */
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return tmp;
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}
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// -------------------------------------------------------------
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void setup(void)
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{
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// Misc
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// Most clumsy way later to be put in eeprom or s/th
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switches[0].nick = 1;
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switches[0].addr[0] = 0x12,
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switches[0].addr[1] = 0x5b;
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switches[0].addr[2] = 0x27;
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switches[0].addr[3] = 0x50;
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switches[0].addr[4] = 0x0;
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switches[0].addr[5] = 0x0;
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switches[0].addr[6] = 0x0;
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switches[0].addr[7] = 0x26;
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switches[0].event_id[0] = 0x01;
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switches[0].event_id[1] = 0x02;
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events[0].id =0x01;
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events[0].telegram.id = 0x0102DEAD;
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events[0].telegram.len = 2;
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events[0].telegram.buf[0] = 0xDE;
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events[0].telegram.buf[1] = 0xAD;
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events[1].id =0x02;
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events[1].telegram.id = 0x0204BEEF;
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events[1].telegram.len = 2;
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events[1].telegram.buf[0] = 0xBE;
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events[1].telegram.buf[1] = 0xEF;
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//{ 0x02040608, 2, { 0xbe, 0xef }}};
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Serial.begin(115200);
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pinMode(led, OUTPUT);
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digitalWrite(led, 1);
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//CAN bus
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pinMode(CAN_RS_PIN,OUTPUT);
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digitalWrite(CAN_RS_PIN,0);
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CANbus.begin();
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txmsg.ext = 1;
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txmsg.timeout = 100;
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delay(100);
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Serial.println(F("Hello Teensy 3.2 CANode awakes."));
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METRO_CAN.reset();
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METRO_OW_read.reset();
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METRO_OW_search.reset();
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}
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// -------------------------------------------------------------
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void loop(void)
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{
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// service software timers based on Metro tick
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if ( METRO_OW_search.check() ) {
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OW_1.reset_search();
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while(OW_1.search(addr) == 1) {
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if ( OneWire::crc8( addr, 7) != addr[7]) {
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Serial.print("CRC is not valid!\n");
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delay(100);
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return;
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}
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Serial.print("Found a device: ");
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print_OW_Device(addr);
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Serial.println("");
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}
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}
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if (METRO_OW_read.check() ) {
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bool action[2];
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readout = read_DS2406(switches[0].addr);
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if (switches[0].state != readout) {
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tmp = readout ^ switches[0].state;
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switches[0].state = readout;
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action[0] = tmp & 0x04;
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action[1] = tmp & 0x08;
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}
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if (action[0]) {
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Serial.print("pioA toggled");
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digitalWrite(led, !digitalRead(led));
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trig_event = switches[0].event_id[0];
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// might need queuing
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event_idx = 0;
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}
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if (action[1]) {
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Serial.print("pioB toggled");
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digitalWrite(led, !digitalRead(led));
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trig_event= switches[0].event_id[1];
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event_idx = 0;
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}
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}
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if ( METRO_CAN.check() ) {
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if ( txTimer ) {
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--txTimer;
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}
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if ( rxTimer ) {
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--rxTimer;
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}
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}
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if ( txmsg.len == 0 && trig_event != 0 ) {
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if ( events[event_idx].id == trig_event ) {
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txmsg.id = events[event_idx].telegram.id;
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txmsg.len = events[event_idx].telegram.len;
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for (uint i=0;i<txmsg.len;i++){
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txmsg.buf[i] = events[event_idx].telegram.buf[i];
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}
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}
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if ( events[event_idx].id == 0) { trig_event = 0; }
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event_idx++;
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}
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// if not time-delayed, read CAN messages and print 1st byte
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if ( !rxTimer ) {
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while ( CANbus.read(rxmsg) ) {
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//hexDump( sizeof(rxmsg), (uint8_t *)&rxmsg );
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DEBUG_WRITE(rxmsg.buf[0]);
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rxCount++;
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}
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}
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// insert a time delay between transmissions
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if ( !txTimer ) {
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// if frames were received, print the count
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if ( rxCount ) {
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//#if DEBUG
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Serial.write('=');
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Serial.print(rxCount);
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Serial.print(",Hello=");
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Serial.print(rxmsg.id,HEX);
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//#endif
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rxCount = 0;
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}
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txTimer = 100;//milliseconds
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//txmsg.len = 8;
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//txmsg.id = 0x222;
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//for( int idx=0; idx<8; ++idx ) {
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// txmsg.buf[idx] = '0'+idx;
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//}
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// send 6 at a time to force tx buffering
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// txCount = 16;
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//digitalWrite(led, 1);
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// Serial.println(".");
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//while ( txCount-- ) {
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if (txmsg.len != 0){
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Serial.print("Sending to CAN");
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Serial.print(txmsg.id,HEX);
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CANbus.write(txmsg);
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txmsg.buf[0]++;
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//}
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txmsg.len = 0;
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}
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// digitalWrite(led, 0);
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// time delay to force some rx data queue use
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rxTimer = 3;//milliseconds
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}
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}
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19
src/CANNode.h
Normal file
19
src/CANNode.h
Normal file
@ -0,0 +1,19 @@
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#include <Arduino.h>
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typedef struct CAN_telegram_t {
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uint32_t id;
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uint8_t len;
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uint8_t buf[8];
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} CAN_telegram_t;
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typedef struct OW_switch_t {
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uint8_t nick;
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uint8_t addr[8];
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uint8_t state;
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uint8_t event_id[2];
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} OW_switch_t;
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typedef struct event_t {
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uint8_t id;
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CAN_telegram_t telegram;
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} event_t;
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