5bcaeff541
This makes LVGL use malloc/free to handle its memory (instead of their own memory handling) and supports a tick interface by which LVGL can ask NuttX the elapsed time, instead of having to periodically "tick" LVGL internal time in a thread.
74 lines
2.7 KiB
C
74 lines
2.7 KiB
C
/****************************************************************************
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* graphics/lvgl/lv_tick_interface.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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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, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdio.h>
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#include "lv_tick_interface.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Type Declarations
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****************************************************************************/
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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uint32_t lv_tick_interface(void)
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{
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static bool first_time = true;
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static struct timeval t0;
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if (first_time)
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{
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gettimeofday(&t0, NULL);
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first_time = false;
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return 0;
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}
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else
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{
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struct timeval t;
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struct timeval delta;
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gettimeofday(&t, NULL);
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timersub(&t, &t0, &delta);
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return delta.tv_sec * 1000 + delta.tv_usec / 1000;
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}
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}
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