AMiRo-OS

#define BL_CALLBACK_TABLE_ADDR  (0x08000000 + 0x01C0)

#define BL_MAGIC_NUMBER         ((uint32_t)0xFF669900u)

#define SHUTDOWN_NONE             0

#define SHUTDOWN_TRANSPORTATION   1

#define SHUTDOWN_DEEPSLEEP        2

#define SHUTDOWN_HIBERNATE        3

#define SHUTDOWN_RESTART          4

#define SHUTDOWN_HANDLE_REQUEST   5

#include <ch.hpp>

#include "global.hpp"

#include <amiro/util/util.h>

#include <amiro/Color.h>

#include <exti.hpp>

#include <chprintf.h>

#include <shell.h>

using namespace amiro;

using namespace chibios_rt;

Global global;

void shellRequestShutdown(BaseSequentialStream* chp, int argc, char *argv[]) {

  chprintf(chp, "shellRequestShutdown\n");

  /* if nor argument was given, print some help text */

  if (argc == 0 || strcmp(argv[0], "help") == 0) {

    chprintf(chp, "\tUSAGE:\n");

    chprintf(chp, "> shutdown <type>\n");

    chprintf(chp, "\n");

    chprintf(chp, "\ttype\n");

    chprintf(chp, "The type of shutdown to perform.\n");

    chprintf(chp, "Choose one of the following types:\n");

    chprintf(chp, "  transportation - Ultra low-power mode with all wakeups disabled.\n");

    chprintf(chp, "                   The robot can not be charged.\n");

    chprintf(chp, "  deepsleep      - Ultra low-power mode with several wakeups enabled.\n");

    chprintf(chp, "                   The robot can only be charged via the power plug.\n");

    chprintf(chp, "  hibernate      - Medium low-power mode, but with full charging capabilities.\n");

    chprintf(chp, "  restart        - Performs a system restart.\n");

    chprintf(chp, "Alternatively, you can use the shortcuts 't', 'd', 'h', and 'r' respectively.");

    chprintf(chp, "\n");

    return;

  }

  if (strcmp(argv[0],"transportation") == 0 || strcmp(argv[0],"t") == 0) {

    shutdown_now = SHUTDOWN_TRANSPORTATION;

    chprintf(chp, "shutdown to transportation mode initialized\n");

  } else if (strcmp(argv[0],"deepsleep") == 0 || strcmp(argv[0],"d") == 0) {

    shutdown_now = SHUTDOWN_DEEPSLEEP;

    chprintf(chp, "shutdown to deepsleep mode initialized\n");

  } else if (strcmp(argv[0],"hibernate") == 0 || strcmp(argv[0],"h") == 0) {

    shutdown_now = SHUTDOWN_HIBERNATE;

    chprintf(chp, "shutdown to hibernate mode initialized\n");

  } else if (strcmp(argv[0],"restart") == 0 || strcmp(argv[0],"r") == 0) {

    chprintf(chp, "restart initialized\n");

    shutdown_now = SHUTDOWN_RESTART;

  } else {

    chprintf(chp, "ERROR: unknown argument!\n");

    shutdown_now = SHUTDOWN_NONE;

  }

  return;

}

void testLights() {

  for (int i = 0; i < (8 * 16 * 2); i++) {

    Color color;

    int brightness;

    switch (((i / 16) / 2) % 8) {

      case 0:

        color = Color::WHITE;

        break;

      case 1:

        color = Color::RED;

        break;

      case 2:

        color = Color::FUCHSIA;

        break;

      case 3:

        color = Color::BLUE;

        break;

      case 4:

        color = Color::AQUA;

        break;

      case 5:

        color = Color::LIME;

        break;

      case 6:

        color = Color::YELLOW;

        break;

      case 7:

      default:

        color = Color::BLACK;

        break;

    }

    if (i & (1 << 4))

      brightness = 10 + (i % 16) * 6;

    else

      brightness = 10;

    global.robot.setLightBrightness(brightness);

    global.robot.setLightColor((i / 2) % 8, color);

    BaseThread::sleep(MS2ST(250));

  }

}

void testColors() {

  Color color;

  global.robot.setLightBrightness(50);

  for (int i = 0; i < Color::YELLOWGREEN; i++) {

    color = Color(static_cast<Color::GlobalColor>(i));

    for (int j = 0; j < 8; j++)

      global.robot.setLightColor(j, color);

    BaseThread::sleep(MS2ST(250));

  }

}

void testFade() {

  for (int i = 0; i < 255; i += 16) {

    Color color(255 - i, i, 0);

    for (int j = 0; j < 8; j++) {

      global.robot.setLightColor(j, color);

      BaseThread::sleep(MS2ST(250));

    }

  }

}

void testBrightness() {

  for (int j = 0; j < 8; j++)

    global.robot.setLightColor(j, Color::WHITE);

  for (int i = 0; i < 200; i += 5) {

    int brightness = (i > 100) ? 200 - i : i;

    global.robot.setLightBrightness(brightness);

    BaseThread::sleep(MS2ST(100));

  }

}

static msg_t shutdownRequest(void *arg) {

  (void) arg;

  const size_t max_str_len = strlen("shutdown");

  uint8_t buffer[20];

  uint8_t num_bytes = 0x00u;

  uint8_t consume;

  while (true) {

    num_bytes += sdAsynchronousRead(&SD1, &buffer[num_bytes], sizeof(buffer) - num_bytes);

    if (num_bytes) {

      consume = 0x01u;

      if (num_bytes >= strlen("shutdown") && !strncmp((char*) buffer, "shutdown", strlen("shutdown"))) {

        boardRequestShutdown();

        consume = strlen("shutdown");

      }

      if (consume != 0x01 || num_bytes >= max_str_len) {

        num_bytes -= consume;

        memcpy(&buffer[0], &buffer[consume], num_bytes);

      }

    }

    BaseThread::sleep(MS2ST(1000));

  }

  return RDY_OK;

}

void systemShutdown() {

  global.userThread.requestTerminate();

  global.userThread.wait();

  global.robot.setLightBrightness(0);

  global.robot.terminate();

  global.tlc5947.requestTerminate();

  global.tlc5947.update();

  global.tlc5947.wait();

  global.lidar.requestTerminate();

  global.lidar.wait();

//  boardStandby();

  return;

}

void shellRequestResetMemory(BaseSequentialStream *chp, int __unused argc, char __unused *argv[]) {

  chprintf(chp, "shellRequestInitMemory\n");

  msg_t res = global.memory.resetMemory();

  if ( res != global.memory.OK)

    chprintf(chp, "Memory Init: FAIL\n");

  else

    chprintf(chp, "Memory Init: OK\n");

}

void shellRequestGetBoardId(BaseSequentialStream *chp, int __unused argc, char __unused *argv[]) {

  chprintf(chp, "shellRequestGetBoardId\n");

  uint8_t id = 0xFFu;

  msg_t res = global.memory.getBoardId(&id);

  if (res != global.memory.OK)

    chprintf(chp, "Get Board ID: FAIL\n");

  else

    chprintf(chp, "Get Board ID: %u\n", id);

}

void shellRequestSetBoardId(BaseSequentialStream *chp, int argc, char *argv[]) {

  chprintf(chp, "shellRequestSetBoardId\n");

  if (argc == 0) {

    chprintf(chp, "Usage: %s\n","set_board_id <idx>");

  } else {

    msg_t res = global.memory.setBoardId(atoi(argv[0]));

    if (res != global.memory.OK)

      chprintf(chp, "Set Board ID: FAIL\n");

    else

      chprintf(chp, "Set Board ID: OK\n");

  }

}

void boardPeripheryCheck(BaseSequentialStream *chp) {

  msg_t result;

  chprintf(chp, "\nCHECK: START\n");

  // Check the radio

  result = global.a2500r24a.getCheck();

  if (result == global.a2500r24a.CHECK_OK)

    chprintf(chp, "A2500R24A: OK\n");

  else

    chprintf(chp, "A2500R24A: FAIL\n");

  // Check the eeprom

  result = global.memory.getCheck();

  if ( result != global.memory.OK)

    chprintf(chp, "Memory Structure: FAIL\n");

  else

    chprintf(chp, "Memory Structure: OK\n");

  // Check the lights

  chprintf(chp, "LEDs: Test colors\n");

  testColors();

  chprintf(chp, "LEDs: Off\n");

  global.robot.setLightBrightness(0);

  chprintf(chp, "CHECK: FINISH\n");

}

void shellRequestGetMemoryData(BaseSequentialStream *chp, int argc, char *argv[]) {

  enum Type {HEX, U8, U16, U32, S8, S16, S32};

  chprintf(chp, "shellRequestReadData\n");

  if (argc < 2 || strcmp(argv[0],"help") == 0)

  {

    chprintf(chp, "Usage: %s\n","get_memory_data <type> <start> [<count>]");

    chprintf(chp, "\n");

    chprintf(chp, "\ttype\n");

    chprintf(chp, "The data type as which to interpret the data.\n");

    chprintf(chp, "Choose one of the following types:\n");

    chprintf(chp, "  hex - one byte as hexadecimal value\n");

    chprintf(chp, "  u8  - unsigned integer (8 bit)\n");

    chprintf(chp, "  u16 - unsigned integer (16 bit)\n");

    chprintf(chp, "  u32 - unsigned integer (32 bit)\n");

    chprintf(chp, "  s8  - signed integer (8 bit)\n");

    chprintf(chp, "  s16 - signed integer (16 bit)\n");

    chprintf(chp, "  s32 - signed integer (32 bit)\n");

    chprintf(chp, "\tstart\n");

    chprintf(chp, "The first byte to read from the memory.\n");

    chprintf(chp, "\tcount [default = 1]\n");

    chprintf(chp, "The number of elements to read.\n");

    chprintf(chp, "\n");

    chprintf(chp, "\tNOTE\n");

    chprintf(chp, "Type conversions of this function might fail.\n");

    chprintf(chp, "If so, use type=hex and convert by hand.\n");

    chprintf(chp, "\n");

    return;

  }

  uint8_t type_size = 0;

  Type type = HEX;

  if (strcmp(argv[0],"hex") == 0) {

    type_size = sizeof(unsigned char);

    type = HEX;

  } else if(strcmp(argv[0],"u8") == 0) {

    type_size = sizeof(uint8_t);

    type = U8;

  } else if(strcmp(argv[0],"u16") == 0) {

    type_size = sizeof(uint16_t);

    type = U16;

  } else if(strcmp(argv[0],"u32") == 0) {

    type_size = sizeof(uint32_t);

    type = U32;

  } else if(strcmp(argv[0],"s8") == 0) {

    type_size = sizeof(int8_t);

    type = S8;

  } else if(strcmp(argv[0],"s16") == 0) {

    type_size = sizeof(int16_t);

    type = S16;

  } else if(strcmp(argv[0],"s32") == 0) {

    type_size = sizeof(int32_t);

    type = S32;

  } else {

    chprintf(chp, "First argument invalid. Use 'get_memory_data help' for help.\n");

    return;

  }

  unsigned int start_byte = atoi(argv[1]);

  unsigned int num_elements = 1;

  if (argc >= 3)

    num_elements = atoi(argv[2]);

  const size_t eeprom_size = EEPROM::getsize(&global.at24c01);

  uint8_t buffer[eeprom_size];

  if (start_byte + (type_size * num_elements) > eeprom_size) {

    num_elements = (eeprom_size - start_byte) / type_size;

    chprintf(chp, "Warning: request exceeds eeprom size -> limiting to %u values.\n", num_elements);

  }

  chFileStreamSeek((BaseFileStream*)&global.at24c01, start_byte);

  // Work around, because stm32f1 cannot read a single byte

  if (type_size*num_elements < 2)

    type_size = 2;

  uint32_t bytes_read = chSequentialStreamRead((BaseFileStream*)&global.at24c01, buffer, type_size*num_elements);

  if (bytes_read != type_size*num_elements)

    chprintf(chp, "Warning: %u of %u requested bytes were read.\n", bytes_read, type_size*num_elements);

  for (unsigned int i = 0; i < num_elements; ++i) {

    switch (type) {

      case HEX:

        chprintf(chp, "%02X ", buffer[i]);

        break;

      case U8:

        chprintf(chp, "%03u ", ((uint8_t*)buffer)[i]);

        break;

      case U16:

        chprintf(chp, "%05u ", ((uint16_t*)buffer)[i]);

        break;

      case U32:

        chprintf(chp, "%010u ", ((uint32_t*)buffer)[i]);

        break;

      case S8:

        chprintf(chp, "%+03d ", ((int8_t*)buffer)[i]);

        break;

      case S16:

        chprintf(chp, "%+05d ", ((int16_t*)buffer)[i]);

        break;

      case S32:

        chprintf(chp, "%+010d ", ((int32_t*)buffer)[i]);

        break;

      default:

        break;

    }

  }

  chprintf(chp, "\n");

  return;

}

void shellRequestCheck(BaseSequentialStream *chp, int __unused argc, char __unused *argv[]) {

  chprintf(chp, "shellRequestCheck\n");

  boardPeripheryCheck(chp);

}

void shellRequestGetRobotId(BaseSequentialStream *chp, int __unused argc, char __unused *argv[]) {

  chprintf(chp, "shellRequestGetRobotId\n");

  chprintf(chp, "Robot ID: %u\n", global.robot.getRobotID());

  if (global.robot.getRobotID() == 0)

    chprintf(chp, "Warning: The ID seems to be uninitialized. Is CAN communication working correctly?\n");

}

void shellRequestGetSystemLoad(BaseSequentialStream *chp, int argc, char *argv[]) {

  chprintf(chp, "shellRequestGetSystemLoad\n");

  uint8_t seconds = 1;

  if (argc >= 1) {

    seconds = atoi(argv[0]);

  }

  chprintf(chp, "measuring CPU load for %u %s...\n", seconds, (seconds>1)? "seconds" : "second");

  const systime_t before = chThdGetTicks(chSysGetIdleThread());

  BaseThread::sleep(S2ST(seconds));

  const systime_t after = chThdGetTicks(chSysGetIdleThread());

  const float usage = 1.0f - (float(after - before) / float(seconds * CH_FREQUENCY));

  chprintf(chp, "CPU load: %3.2f%%\n", usage * 100);

  const uint32_t memory_total = 0x10000;

  const uint32_t memory_load = memory_total - chCoreStatus();

  chprintf(chp, "RAM load: %3.2f%% (%u / %u Byte)\n", float(memory_load)/float(memory_total) * 100, memory_load, memory_total);

}

void shellSwitchBoardCmd(BaseSequentialStream *chp, int argc, char *argv[]) {

  if (argc != 1) {

    chprintf(chp, "Call with decimal numbers: shell_board <idx>\n");

    return;

  }

  uint8_t boardIdx = static_cast<uint8_t>(atoi(argv[0]));

  chprintf(chp, "shellSwitchBoardCmd\n");

  global.sercanmux1.sendSwitchCmd(boardIdx);

}

void shellRequestGetBootloaderInfo(BaseSequentialStream* chp, int argc, char *argv[]) {

  // check the magic number

  if (*((uint32_t*)(BL_CALLBACK_TABLE_ADDR)) == BL_MAGIC_NUMBER) {

    chprintf(chp, "Bootloader version:  %u.%u.%u\n",

             *((uint32_t*)(BL_CALLBACK_TABLE_ADDR + (1*4))),

             *((uint32_t*)(BL_CALLBACK_TABLE_ADDR + (2*4))),

             *((uint32_t*)(BL_CALLBACK_TABLE_ADDR + (3*4))));

    chprintf(chp, "Callback functions:\n");if (*((uint32_t*)(BL_CALLBACK_TABLE_ADDR + (1*4))) == 0 && *((uint32_t*)(BL_CALLBACK_TABLE_ADDR + (2*4))) == 2) {

      chprintf(chp, "\thibernate:      %s\n", *((uint32_t*)(BL_CALLBACK_TABLE_ADDR + (4*4))) ? "available" : "unsupported");

      chprintf(chp, "\tdeepsleep:      %s\n", *((uint32_t*)(BL_CALLBACK_TABLE_ADDR + (5*4))) ? "available" : "unsupported");

      chprintf(chp, "\ttransportation: %s\n", *((uint32_t*)(BL_CALLBACK_TABLE_ADDR + (6*4))) ? "available" : "unsupported");

      chprintf(chp, "\trestart:        %s\n", *((uint32_t*)(BL_CALLBACK_TABLE_ADDR + (10*4))) ? "available" : "unsupported");

    } else if (*((uint32_t*)(BL_CALLBACK_TABLE_ADDR + (1*4))) == 0 && *((uint32_t*)(BL_CALLBACK_TABLE_ADDR + (2*4))) == 3) {

      chprintf(chp, "\thibernate:      %s\n", *((uint32_t*)(BL_CALLBACK_TABLE_ADDR + (4*4))) ? "available" : "unsupported");

      chprintf(chp, "\tdeepsleep:      %s\n", *((uint32_t*)(BL_CALLBACK_TABLE_ADDR + (5*4))) ? "available" : "unsupported");

      chprintf(chp, "\ttransportation: %s\n", *((uint32_t*)(BL_CALLBACK_TABLE_ADDR + (6*4))) ? "available" : "unsupported");

      chprintf(chp, "\trestart:        %s\n", *((uint32_t*)(BL_CALLBACK_TABLE_ADDR + (7*4))) ? "available" : "unsupported");

      chprintf(chp, "\thandle request: %s\n", *((uint32_t*)(BL_CALLBACK_TABLE_ADDR + (8*4))) ? "available" : "unsupported");

    }

  } else {

    chprintf((BaseSequentialStream*) &SD1, "Bootloader deprecated\n");

  }

  return;

}

static const ShellCommand commands[] = {

  {"shutdown", shellRequestShutdown},

  {"check", shellRequestCheck},

  {"reset_memory", shellRequestResetMemory},

  {"get_board_id", shellRequestGetBoardId},

  {"set_board_id", shellRequestSetBoardId},

  {"get_memory_data", shellRequestGetMemoryData},

  {"get_robot_id", shellRequestGetRobotId},

  {"get_system_load", shellRequestGetSystemLoad},

  {"shell_board", shellSwitchBoardCmd},

  {"get_bootloader_info", shellRequestGetBootloaderInfo},

  {NULL, NULL}

};

static const ShellConfig shell_cfg1 = {

  (BaseSequentialStream *) &global.sercanmux1,

  commands

};

/*

 * Application entry point.

 */

int main(void) {

  Thread *shelltp = NULL;

//  global.shellTermID = CAN::LIGHT_RING_ID;

  /*

   * System initializations.

   * - HAL initialization, this also initializes the configured device drivers

   *   and performs the board-specific initializations.

   * - Kernel initialization, the main() function becomes a thread and the

   *   RTOS is active.

   */

  halInit();

  System::init();

  /*

   * Activates the serial driver 2 using the driver default configuration.

   */

  sdStart(&SD1, &global.sd1_config);

  sdStart(&SD2, &global.sd2_config);

  chprintf((BaseSequentialStream*) &SD1, "\n");

  chprintf((BaseSequentialStream*) &SD1, BOARD_NAME " " BOARD_VERSION "\n");

  if (*((uint32_t*)(BL_CALLBACK_TABLE_ADDR)) == BL_MAGIC_NUMBER) {

    chprintf((BaseSequentialStream*) &SD1, "Bootloader %u.%u.%u\n",

             *((uint32_t*)(BL_CALLBACK_TABLE_ADDR + (1*4))),

             *((uint32_t*)(BL_CALLBACK_TABLE_ADDR + (2*4))),

             *((uint32_t*)(BL_CALLBACK_TABLE_ADDR + (3*4))));

  } else {

    chprintf((BaseSequentialStream*) &SD1, "Bootloader deprecated\n");

  }

  chprintf((BaseSequentialStream*) &SD1, "ChibiOS " CH_KERNEL_VERSION "\n");

  // make sure that the info text is completetly printed

  BaseThread::sleep(10);

  extStart(&EXTD1, &extcfg);

  boardClearI2CBus(GPIOB_MEM_SCL, GPIOB_MEM_SDA);

  global.HW_I2C2.start(&global.i2c2_config);

  global.memory.init();

  uint8_t i = 0;

  if (global.memory.getBoardId(&i) == fileSystemIo::FileSystemIoBase::OK) {

    chprintf((BaseSequentialStream*) &SD1, "Board ID: %u\n", i);

  } else {

    chprintf((BaseSequentialStream*) &SD1, "Error reading board ID\n");

  }

  chprintf((BaseSequentialStream*) &SD1, "\n");

  global.tlc5947.start(NORMALPRIO + 5);

  global.tlc5947.enable();

  global.robot.start(HIGHPRIO - 1);

//   lidar.start(NORMALPRIO + 15); UNCOMMENT TO START LIDAR

  global.lidar.start(NORMALPRIO);

  global.userThread.start(NORMALPRIO);

  /* let the SYS_SYNC_N pin go, to signal that the initialization of the module is done */

  palWritePad(GPIOD, GPIOD_SYS_INT_N, PAL_HIGH);

  /* wait until all modules are done */

  while (palReadPad(GPIOD, GPIOD_SYS_INT_N) == PAL_LOW) {

    continue;

  }

  global.robot.setLightBrightness(10);

  global.robot.setLightColor(0, Color::RED);

  global.robot.setLightColor(1, Color::LIME);

  global.robot.setLightColor(2, Color::BLUE);

  global.robot.setLightColor(3, Color::WHITE);

  global.robot.setLightColor(4, Color::RED);

  global.robot.setLightColor(5, Color::LIME);

  global.robot.setLightColor(6, Color::BLUE);

  global.robot.setLightColor(7, Color::WHITE);

//   static uint16_t scannedData[NUMBER_OF_STEPS /*see lidar.h for this variable*/] = {}; UNCOMMENT TO START LIDAR

  while (true) {

    if (!shelltp)

      shelltp = shellCreate(&shell_cfg1, THD_WA_SIZE(1024), NORMALPRIO);

    else if (chThdTerminated(shelltp)) {

      chThdRelease(shelltp);    /* Recovers memory of the previous shell. */

      shelltp = NULL;           /* Triggers spawning of a new shell.      */

    }

//    testLights();

//    testColors();

//    testFade();

//    testBrightness();

    if (shutdown_now != SHUTDOWN_NONE) {

      if (*((uint32_t*)(BL_CALLBACK_TABLE_ADDR)) != BL_MAGIC_NUMBER) {

        chprintf((BaseSequentialStream*) &SD1, "ERROR: unable to shut down (bootloader deprecated).\n");

        shutdown_now = SHUTDOWN_NONE;

      } else {

        uint32_t blCallbackPtrAddr = BL_CALLBACK_TABLE_ADDR;

        if (*((uint32_t*)(BL_CALLBACK_TABLE_ADDR + (1*4))) == 0 && *((uint32_t*)(BL_CALLBACK_TABLE_ADDR + (2*4))) == 2) {

          switch (shutdown_now) {

            case SHUTDOWN_TRANSPORTATION:

              blCallbackPtrAddr += 6 * 4;

              break;

            case SHUTDOWN_DEEPSLEEP:

              blCallbackPtrAddr += 5 * 4;

              break;

            case SHUTDOWN_HIBERNATE:

              blCallbackPtrAddr += 4 * 4;

              break;

            case SHUTDOWN_HANDLE_REQUEST:

            case SHUTDOWN_RESTART:

              blCallbackPtrAddr += 10 * 4;

              break;

            default:

              blCallbackPtrAddr = 0;

              break;

          }

        } else if (*((uint32_t*)(BL_CALLBACK_TABLE_ADDR + (1*4))) == 0 && *((uint32_t*)(BL_CALLBACK_TABLE_ADDR + (2*4))) == 3) {

          switch (shutdown_now) {

            case SHUTDOWN_TRANSPORTATION:

              blCallbackPtrAddr += 6 * 4;

              break;

            case SHUTDOWN_DEEPSLEEP:

              blCallbackPtrAddr += 5 * 4;

              break;

            case SHUTDOWN_HIBERNATE:

              blCallbackPtrAddr += 4 * 4;

              break;

            case SHUTDOWN_RESTART:

              blCallbackPtrAddr += 7 * 4;

              break;

            case SHUTDOWN_HANDLE_REQUEST:

              blCallbackPtrAddr += 8 * 4;

              break;

            default:

              blCallbackPtrAddr = 0;

              break;

          }

        }

        void (*blCallback)(void) = NULL;

        if (blCallbackPtrAddr) {

          blCallback = (void (*)(void))(*((uint32_t*)blCallbackPtrAddr));

          if (!blCallback) {

            chprintf((BaseSequentialStream*) &SD1, "ERROR: Requested shutdown not supported.\n");

            shutdown_now = SHUTDOWN_NONE;

          } else {

            chprintf((BaseSequentialStream*)&SD1, "initiating shutdown sequence...\n");

            palWritePad(GPIOD, GPIOD_SYS_INT_N, PAL_LOW);

            palWritePad(GPIOC, GPIOC_SYS_PD_N, PAL_LOW);

            chprintf((BaseSequentialStream*)&SD1, "stopping all threads and periphery...");

            systemShutdown();

            chprintf((BaseSequentialStream*)&SD1, "\tdone\n");

            BaseThread::sleep(MS2ST(10)); // sleep to print everything

            blCallback();

          }

        } else {

          chprintf((BaseSequentialStream*)&SD1, "ERROR: invalid shutdown requested (%u).\n", shutdown_now);

          shutdown_now = SHUTDOWN_NONE;

        }

      }

    }

//     // Print LIDAR scan

//     if (global.lidar.getScan(scannedData)) {

//       for (uint16_t idx = 0; idx < NUMBER_OF_STEPS; ++idx) {

//         chprintf((BaseSequentialStream*) &SD1, "%d ", scannedData[idx]);

//       }

//       chprintf((BaseSequentialStream*) &SD1, "\n\n");

//     }

    BaseThread::sleep(MS2ST(500));

  }

  return 0;

}