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- /**************
- * dl_cache.h *
- **************/
-
- /****************************************************************************
- * Written By Marcio Teixeira 2018 - Aleph Objects, Inc. *
- * *
- * 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. *
- * *
- * To view a copy of the GNU General Public License, go to the following *
- * location: <https://www.gnu.org/licenses/>. *
- ****************************************************************************/
-
- #pragma once
-
- /******************* DISPLAY LIST CACHE MANAGEMENT ************************/
- /* The Display List Cache mechanism stores the display list corresponding
- * to a menu into RAM_G so that on subsequent calls drawing the menu does
- * not require as much SPI traffic. Dynamic content, such as indicators,
- * should not be cached.
- *
- * The DLCache can be used like so:
- *
- * void some_function() {
- * DLCache dlcache(UNIQUE_ID);
- *
- * if (dlcache.hasData()) {
- * dlcache.append();
- * } else {
- * // Add stuff to the DL
- * dlcache.store();
- * }
- */
- class DLCache {
- private:
- typedef FTDI::ftdi_registers REG;
- typedef FTDI::ftdi_memory_map MAP;
-
- uint8_t dl_slot_indx;
- uint32_t dl_slot_addr;
- uint16_t dl_slot_size;
- uint16_t dl_slot_used;
-
- void load_slot() {load_slot(dl_slot_indx, dl_slot_addr, dl_slot_size, dl_slot_used);}
- void save_slot() {save_slot(dl_slot_indx, dl_slot_addr, dl_slot_size, dl_slot_used);}
-
- static void load_slot(uint8_t indx, uint32_t &addr, uint16_t &size, uint16_t &used);
- static void save_slot(uint8_t indx, uint32_t addr, uint16_t size, uint16_t used);
-
- bool wait_until_idle();
-
- public:
- static void init();
-
- DLCache(uint8_t slot) {
- dl_slot_indx = slot;
- load_slot();
- }
-
- bool has_data();
- bool store(uint32_t min_bytes = 0);
- void append();
- };
-
- #define DL_CACHE_SLOTS 250
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