7c494055e3
App can contain a stub program resident in RTC fast memory. Bootloader
will load the stub on initial boot. If the device wakes from deep sleep,
the stub is run immediately (before any other data is loaded, etc.)
To implement a custom wake stub, implement a function in your program:
```
void RTC_IRAM_ATTR esp_wake_deep_sleep(void)
{
esp_default_wake_deep_sleep();
// other wake logic
}
```
... and it will replace the default implementation.
42 lines
1.5 KiB
C
42 lines
1.5 KiB
C
// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef __ESP_ATTR_H__
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#define __ESP_ATTR_H__
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#define ROMFN_ATTR
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//Normally, the linker script will put all code and rodata in flash,
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//and all variables in shared RAM. These macros can be used to redirect
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//particular functions/variables to other memory regions.
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// Forces code into IRAM instead of flash
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#define IRAM_ATTR __attribute__((section(".iram1")))
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// Forces data into DRAM instead of flash
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#define DRAM_ATTR __attribute__((section(".dram1")))
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// Forces code into RTC fast memory
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#define RTC_IRAM_ATTR __attribute__((section(".rtc.text")))
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// Forces data into RTC slow memory
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// Any variable marked with this attribute will keep its value
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// during a deep sleep / wake cycle.
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#define RTC_DATA_ATTR __attribute__((section(".rtc.data")))
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// Forces read-only data into RTC slow memory
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// Makes constant data available to RTC wake stubs (see esp_deepsleep.h)
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#define RTC_RODATA_ATTR __attribute__((section(".rtc.rodata")))
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#endif /* __ESP_ATTR_H__ */
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