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54 lines
2.1 KiB
54 lines
2.1 KiB
/*
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u8g2_cleardisplay.c
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Universal 8bit Graphics Library (https://github.com/olikraus/u8g2/)
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Copyright (c) 2016, olikraus@gmail.com
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All rights reserved.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice, this list
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of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice, this
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list of conditions and the following disclaimer in the documentation and/or other
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materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "u8g2.h"
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/* Clear screen buffer & display reliable for all u8g2 displays. */
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/* This is done with u8g2 picture loop, because we can not use the u8x8 function in all cases */
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void u8g2_ClearDisplay(u8g2_t *u8g2)
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{
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u8g2_FirstPage(u8g2);
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do {
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} while ( u8g2_NextPage(u8g2) );
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/*
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This function is usually called during startup (u8g2.begin()).
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However the user might want to use full buffer mode with clear and
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send commands.
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This will not work because the current tile row is modified by the picture
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loop above. To fix this, reset the tile row to 0, issue #370
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A workaround would be, that the user sets the current tile row to 0 manually.
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*/
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u8g2_SetBufferCurrTileRow(u8g2, 0);
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}
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