sys_api_cdc_comm.c

#ifdef __USB_COMM__
#include "sys_api_cdc_comm.h"
#include "app_factory_cdc_comm.h"
#include "hal_bootmode.h"
#include "hwtimer_list.h"
#include "pmu.h"
#ifdef CHIP_HAS_USB
#include "usb_cdc.h"
#endif

#define TIMEOUT_INFINITE ((uint32_t)-1)

const unsigned int default_recv_timeout_short = MS_TO_TICKS(500);
const unsigned int default_recv_timeout_idle =
    TIMEOUT_INFINITE; // MS_TO_TICKS(10 * 60 * 1000);
const unsigned int default_recv_timeout_4k_data = MS_TO_TICKS(500);
const unsigned int default_send_timeout = MS_TO_TICKS(500);

static uint32_t send_timeout;
static uint32_t recv_timeout;

static volatile bool cancel_xfer = false;

static uint32_t xfer_err_time = 0;
static uint32_t xfer_err_cnt = 0;

static HWTIMER_ID xfer_timer;

static const struct USB_SERIAL_CFG_T cdc_cfg = {
    .mode = USB_SERIAL_API_NONBLOCKING,
};

void reset_transport(void) {
  cancel_xfer = false;

  if (xfer_timer) {
    hwtimer_stop(xfer_timer);
  } else {
    xfer_timer = hwtimer_alloc(NULL, NULL);
  }

  usb_serial_flush_recv_buffer();
  usb_serial_init_xfer();
  set_recv_timeout(default_recv_timeout_short);
  set_send_timeout(default_send_timeout);
}

void set_recv_timeout(unsigned int timeout) { recv_timeout = timeout; }

void set_send_timeout(unsigned int timeout) { send_timeout = timeout; }

static void usb_send_timeout(void *param) { usb_serial_cancel_send(); }

static void usb_send_timer_start(void) {
  if (send_timeout == TIMEOUT_INFINITE) {
    return;
  }

  if (xfer_timer) {
    hwtimer_update_then_start(xfer_timer, usb_send_timeout, NULL, send_timeout);
  }
}

static void usb_send_timer_stop(void) {
  if (xfer_timer) {
    hwtimer_stop(xfer_timer);
  }
}

static int usb_send_data(const unsigned char *buf, size_t len) {
  int ret;

  usb_send_timer_start();
  ret = usb_serial_send(buf, len);
  usb_send_timer_stop();
  return ret;
}

int send_data(const unsigned char *buf, size_t len) {
  if (cancel_xfer) {
    return -1;
  }
  return usb_send_data(buf, len);
}

static void usb_recv_timeout(void *param) { usb_serial_cancel_recv(); }

static void usb_recv_timer_start(void) {
  if (recv_timeout == TIMEOUT_INFINITE) {
    return;
  }

  if (xfer_timer) {
    hwtimer_update_then_start(xfer_timer, usb_recv_timeout, NULL, recv_timeout);
  }
}

static void usb_recv_timer_stop(void) {
  if (xfer_timer) {
    hwtimer_stop(xfer_timer);
  }
}

static int usb_recv_data(unsigned char *buf, size_t len, size_t *rlen) {
  int ret;

  usb_recv_timer_start();
  ret = usb_serial_recv(buf, len);
  usb_recv_timer_stop();
  if (ret == 0) {
    *rlen = len;
  }
  return ret;
}

int recv_data_ex(unsigned char *buf, size_t len, size_t expect, size_t *rlen) {
  if (cancel_xfer) {
    return -1;
  }
  return usb_recv_data(buf, expect, rlen);
}

static int usb_handle_error(void) {
  int ret;

  TRACE(0, "****** Send break ******");

  // Send break signal, to tell the peer to reset the connection
  ret = usb_serial_send_break();
  if (ret) {
    TRACE(1, "Sending break failed: %d", ret);
  }
  return ret;
}

int handle_error(void) {
  int ret = 0;
  uint32_t err_time;

  hal_sys_timer_delay(MS_TO_TICKS(50));

  if (!cancel_xfer) {
    ret = usb_handle_error();
  }

  err_time = hal_sys_timer_get();
  if (xfer_err_cnt == 0 || err_time - xfer_err_time > MS_TO_TICKS(5000)) {
    xfer_err_cnt = 0;
    xfer_err_time = err_time;
  }
  xfer_err_cnt++;
  if (xfer_err_cnt < 3) {
    hal_sys_timer_delay(MS_TO_TICKS(100));
  } else if (xfer_err_cnt < 5) {
    hal_sys_timer_delay(MS_TO_TICKS(500));
  } else {
    hal_sys_timer_delay(MS_TO_TICKS(2000));
  }

  return ret;
}

static int usb_cancel_input(void) { return usb_serial_flush_recv_buffer(); }

int cancel_input(void) { return usb_cancel_input(); }

void system_reboot(void) {
  hal_sys_timer_delay(MS_TO_TICKS(10));
  hal_cmu_sys_reboot();
}

void system_shutdown(void) {
#if 0
    if (dld_transport == TRANSPORT_USB) {
        // Avoid PC usb serial driver hanging
        usb_serial_close();
    }
#endif
  hal_sys_timer_delay(MS_TO_TICKS(10));
  pmu_shutdown();
}

void system_set_bootmode(unsigned int bootmode) {
  bootmode &= ~(HAL_SW_BOOTMODE_READ_ENABLED | HAL_SW_BOOTMODE_WRITE_ENABLED);
  hal_sw_bootmode_set(bootmode);
}

void system_clear_bootmode(unsigned int bootmode) {
  bootmode &= ~(HAL_SW_BOOTMODE_READ_ENABLED | HAL_SW_BOOTMODE_WRITE_ENABLED);
  hal_sw_bootmode_clear(bootmode);
}

unsigned int system_get_bootmode(void) { return hal_sw_bootmode_get(); }
#endif