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/**
* Marlin 3D Printer Firmware
* Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
*
* Based on Sprinter and grbl.
* Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
*/
#pragma once
/* DGUS implementation written by coldtobi in 2019 for Marlin */
#include "../../../../inc/MarlinConfigPre.h"
#include <stdlib.h> // size_t
#if HAS_BED_PROBE
#include "../../../../module/probe.h"
#endif
#include "DGUSVPVariable.h"
enum DGUSLCD_Screens : uint8_t;
#define DEBUG_OUT ENABLED(DEBUG_DGUSLCD)
#include "../../../../core/debug_out.h"
typedef enum : uint8_t {
DGUS_IDLE, //< waiting for DGUS_HEADER1.
DGUS_HEADER1_SEEN, //< DGUS_HEADER1 received
DGUS_HEADER2_SEEN, //< DGUS_HEADER2 received
DGUS_WAIT_TELEGRAM, //< LEN received, Waiting for to receive all bytes.
} rx_datagram_state_t;
// Low-Level access to the display.
class DGUSDisplay {
public:
DGUSDisplay() = default;
static void InitDisplay();
// Variable access.
static void WriteVariable(uint16_t adr, const void* values, uint8_t valueslen, bool isstr=false);
static void WriteVariablePGM(uint16_t adr, const void* values, uint8_t valueslen, bool isstr=false);
static void WriteVariable(uint16_t adr, int16_t value);
static void WriteVariable(uint16_t adr, uint16_t value);
static void WriteVariable(uint16_t adr, uint8_t value);
static void WriteVariable(uint16_t adr, int8_t value);
static void WriteVariable(uint16_t adr, long value);
// Utility functions for bridging ui_api and dbus
template<typename T, float(*Getter)(const T), T selector, typename WireType=uint16_t>
static void SetVariable(DGUS_VP_Variable &var) {
WriteVariable(var.VP, (WireType)Getter(selector));
}
template<typename T, void(*Setter)(const float V, const T), T selector>
static void GetVariable(DGUS_VP_Variable &var, void *val_ptr) {
uint16_t newvalue = swap16(*(uint16_t*)val_ptr);
Setter(newvalue, selector);
}
// Until now I did not need to actively read from the display. That's why there is no ReadVariable
// (I extensively use the auto upload of the display)
// Force display into another screen.
// (And trigger update of containing VPs)
// (to implement a pop up message, which may not be nested)
static void RequestScreen(DGUSLCD_Screens screen);
// Periodic tasks, eg. Rx-Queue handling.
static void loop();
public:
// Helper for users of this class to estimate if an interaction would be blocking.
static size_t GetFreeTxBuffer();
// Checks two things: Can we confirm the presence of the display and has we initiliazed it.
// (both boils down that the display answered to our chatting)
static inline bool isInitialized() { return Initialized; }
private:
static void WriteHeader(uint16_t adr, uint8_t cmd, uint8_t payloadlen);
static void WritePGM(const char str[], uint8_t len);
static void ProcessRx();
static inline uint16_t swap16(const uint16_t value) { return (value & 0xFFU) << 8U | (value >> 8U); }
static rx_datagram_state_t rx_datagram_state;
static uint8_t rx_datagram_len;
static bool Initialized, no_reentrance;
};
#define GET_VARIABLE(f, t, V...) (&DGUSDisplay::GetVariable<decltype(t), f, t, ##V>)
#define SET_VARIABLE(f, t, V...) (&DGUSDisplay::SetVariable<decltype(t), f, t, ##V>)
extern DGUSDisplay dgusdisplay;
// compile-time x^y
constexpr float cpow(const float x, const int y) { return y == 0 ? 1.0 : x * cpow(x, y - 1); }
/// Find the flash address of a DGUS_VP_Variable for the VP.
extern const DGUS_VP_Variable* DGUSLCD_FindVPVar(const uint16_t vp);
/// Helper to populate a DGUS_VP_Variable for a given VP. Return false if not found.
extern bool populate_VPVar(const uint16_t VP, DGUS_VP_Variable * const ramcopy);
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