Provide stdio retargeting to TFT address mapped mode.

License

SPDX-License-Identifier: Zlib

The licensor of this software is Silicon Laboratories Inc.

This software is provided 'as-is', without any express or implied warranty. In no event will the authors be held liable for any damages arising from the use of this software.

Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions:

The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
This notice may not be removed or altered from any source distribution.

Definition in file retargettft.c .


       #include <stdio.h>


       #include <stdint.h>


       #include "em_device.h"


       #include "
       
        em_cmu.h
       
       "


       #include "
       
        em_ebi.h
       
       "


       #include "
       
        em_gpio.h
       
       "


       #include "dmd/ssd2119/dmd_ssd2119.h"


       #include "
       
        bsp.h
       
       "


       #include "
       
        retargettft.h
       
       "


       #include "
       
        displayfont8x8.h
       
       "

Macros
#define	CHARS 40

#define	fontBits chars_8x8_bits

#define	LINES 30

Functions
int	RETARGET_ReadChar (void)
	Receive a byte No input method from TFT is possible, thus we always return -1.

void	RETARGET_TftCrLf (int on)
	Toggle LF to CRLF conversion.

void	RETARGET_TftInit (void)
	Intializes TFT text display.

void	RETARGET_TFTTX (int c)
	Transmit/display a character.

void	RETARGET_TFTUpdate (bool fullFrame)
	Display framebuffer.

int	RETARGET_WriteChar (char c)
	Transmit single byte to the TFT.

static void	tftTextReset (void)
	Reset TFT text display state.

static void	tftTextScrollUp (void)
	Scroll one line of characters up on the screen.

Variables
static bool	bufferReset = true

static uint8_t	charBuffer [ LINES ][ CHARS ]

static bool	fullUpdate = true

static bool	initialized = false

static bool	LFtoCRLF = 0

static uint8_t	rgbColor [3]

static bool	tftReset = true

static int	xpos

static int	ypos