components/bootloader/subproject/main/flash_qio_mode.h

   1 // Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
   2 //
   3 // Licensed under the Apache License, Version 2.0 (the "License");
   4 // you may not use this file except in compliance with the License.
   5 // You may obtain a copy of the License at
   6
   7 //     http://www.apache.org/licenses/LICENSE-2.0
   8 //
   9 // Unless required by applicable law or agreed to in writing, software
  10 // distributed under the License is distributed on an "AS IS" BASIS,
  11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 // See the License for the specific language governing permissions and
  13 // limitations under the License.
  14 #pragma once
  15
  16 #ifdef __cplusplus
  17 extern "C" {
  18 #endif
  19
  20 /** @brief Enable Quad I/O mode in bootloader (if configured)
  21  *
  22  * Queries attached SPI flash ID and sends correct SPI flash
  23  * commands to enable QIO or QOUT mode, then enables this mode.
  24  */
  25 void bootloader_enable_qio_mode(void);
  26
  27 #ifdef __cplusplus
  28 }
  29 #endif