42 lines
1.5 KiB
C++
42 lines
1.5 KiB
C++
 
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#pragma once
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#include "UiTypes.h"
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#include "Config.h"
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// Nextion serial HMI driver. No Nextion library - the protocol is small:
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//
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// Nextion -> remote: custom frames the HMI's touch events send with printh:
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// '#' <len> <cmd> [value] e.g. printh 23 01 41 (ToggleArm)
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// printh 23 02 56 + prints hSpeed.val,1
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// Command bytes are listed in NEXTION.md and in NextionUI.cpp.
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// Native Nextion return frames (terminated FF FF FF) are also parsed so a
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// display reset (0x88 "ready") triggers a full redraw.
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//
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// remote -> Nextion: plain instructions ("bArm.txt=\"ARMED\"" + FF FF FF).
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//
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// The remote is authoritative: buttons are plain buttons (not dual-state),
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// they only send requests, and render() repaints whatever the remote state
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// actually is. A Nextion reboot or a dropped byte self-heals on the next
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// periodic full refresh.
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class NextionUI {
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public:
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void begin();
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bool poll(UiEvent& out); // call every loop; returns one decoded event at a time
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void render(const UiView& v, uint32_t now_ms);
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private:
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enum class Rx : uint8_t { Idle, CustomLen, CustomBody, Native };
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Rx rx_ = Rx::Idle;
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uint8_t body_[4];
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uint8_t body_len_ = 0, body_got_ = 0;
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uint8_t native_first_ = 0, native_len_ = 0, ff_run_ = 0;
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UiView shown_;
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bool force_full_ = true;
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uint32_t last_full_ms_ = 0;
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uint32_t last_link_ms_ = 0;
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void cmd(const char* fmt, ...);
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void pushState(const UiView& v, bool full);
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void pushLink(const UiView& v);
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bool decodeCustom(UiEvent& out);
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};
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