esp8266_usb_flash.c

#include "main-header.h"
#include "loader-api.h"
#include "addressing.h"
#include "espressif/esp8266_flash.h"
#include "proto-esp-usart.h"
#include "platform-header.h"
#include "wireless_state_machine.h"
#include "usb.h"
// #include "bare-metal.h"
#include "led.h"
extern struct ringbuffer esp_ringbuffer;
 
/********************************************************************************
* flash wifi via usb (across console) using esptool
********************************************************************************/
 
// we add bytes received from usb into the serial port buffer
void esp8266_usb_byte_received(byte b) {
  write_serial_char(USART_ESP8266, b);
  reset_delay_counter(DELAY_ESP2SERIAL);
}
 
 
void esp8266_wififlash_usb_bridge() {
  mculib_usb_set_received_callback(MAIN_MCULIBHANDLE, esp8266_usb_byte_received);
  print_to_usb(0);
  printf("Bridging esp2866 & usb...\r\n");
  int res = espflash_sync();
 
  if (res) {
    printf("FAIL: failed to sync to esp8266. Is it connected and powered up?\r\n");
    print_to_usb(1);
    return;
  }
  int i;
 
  led_indicate(LED_WIFI_BRIDGE);
  printf("Entering passthrough mode\r\n");
  printf("[BRIDGE ACTIVE]\r\n"); // easy parse ;)
  //  esp8266_usart_mode = ESP8266_USART_PASSTHROUGH;
  reset_delay_counter(DELAY_ESP2SERIAL);
  reset_delay_counter(DELAY_DEFAULT);
  avoid_watchdog();
  int contbridge = 0;
 
  for (;;) {
    avoid_watchdog();
    // deal with chars from esp8266 while bridged
    if ((i = ringbuffer_get_byte(&esp_ringbuffer)) < 256) {
      mculib_usb_send(MAIN_MCULIBHANDLE, 1, (uint8_t *)&i);
    }
    if ((contbridge == 0) && (get_delay_counter(DELAY_ESP2SERIAL) > 500)) {
      printf("Leaving passthrough mode.\r\n");
      //      esp8266_usart_mode = ESP8266_USART_PACKET_ONLY;
      printf("[BRIDGE MODE FINISHED]\r\n"); // easy parse ;)
      break;
    }
  }
  usb_restore_irq();
  print_to_usb(1);
  led_indicate(LED_WIFI_BRIDGE2);
  esp8266_reset();
}