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55 lines
1.4 KiB
55 lines
1.4 KiB
/*
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RTMEM MODULE
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Copyright (C) 2019 by Maxim Prokhorov <prokhorov dot max at outlook dot com>
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*/
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#pragma once
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// Base address of USER RTC memory
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// https://github.com/esp8266/esp8266-wiki/wiki/Memory-Map#memmory-mapped-io-registers
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#define RTCMEM_ADDR_BASE (0x60001200)
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// RTC memory is accessed using blocks of 4 bytes.
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// Blocks 0..63 are reserved by the SDK, 64..192 are available to the user.
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// Blocks 64..96 are reserved by the eboot 'struct eboot_command' (128 -> (128 / 4) -> 32):
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// https://github.com/esp8266/Arduino/blob/master/bootloaders/eboot/eboot_command.h
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#define RTCMEM_OFFSET 32u
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#define RTCMEM_ADDR (RTCMEM_ADDR_BASE + (RTCMEM_OFFSET * 4u))
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#define RTCMEM_BLOCKS 96u
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// Change this when modifying RtcmemData
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#define RTCMEM_MAGIC 0x45535075
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// XXX: All access must be 4-byte aligned and always at full length.
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//
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// For example, using bitfields / inner structs / etc:
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// ...
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// uint32_t a : 8;
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// uint32_t b : 8;
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// uint32_t c : 8;
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// uint32_t d : 8;
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// ...
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//
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// This would not write the expected thing:
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// mem->d = 4;
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// TODO replace with custom memory segment in ldscript?
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struct RtcmemData {
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uint32_t magic;
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uint32_t sys;
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uint32_t relay;
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uint32_t mqtt;
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uint64_t light;
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double energy[4];
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};
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static_assert(sizeof(RtcmemData) <= (RTCMEM_BLOCKS * 4u), "RTCMEM struct is too big");
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constexpr uint8_t RtcmemSize = (sizeof(RtcmemData) / 4u);
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auto Rtcmem = reinterpret_cast<volatile RtcmemData*>(RTCMEM_ADDR);
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bool rtcmemStatus();
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