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stm32l1: lcd: Define all LCD registers

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Define minimal susbet of necessary functions for work with LCD screen.
This commit is contained in:
Nikolay Merinov
2014-03-02 18:21:43 +06:00
committed by Karl Palsson
parent 14f1ac4764
commit 553a14f21d
3 changed files with 259 additions and 1 deletions
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2
lib/stm32/l1/Makefile
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@@ -33,7 +33,7 @@ CFLAGS = -Os -g \
-ffunction-sections -fdata-sections -MD -DSTM32L1
# ARFLAGS = rcsv
ARFLAGS = rcs
OBJS = crc.o desig.o flash.o rcc.o usart.o dma.o
OBJS = crc.o desig.o flash.o rcc.o usart.o dma.o lcd.o
OBJS += crc_common_all.o dac_common_all.o
OBJS += dma_common_l1f013.o
OBJS += gpio_common_all.o gpio_common_f0234.o

42
lib/stm32/l1/lcd.c Normal file
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@@ -0,0 +1,42 @@
/*
* This file is part of the libopencm3 project.
*
* Copyright (C) 2014 Nikolay Merinov <nikolay.merinov@member.fsf.org>
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include <libopencm3/stm32/l1/lcd.h>
void lcd_enable(void)
{
LCD_CR |= LCD_CR_LCDEN;
while ((LCD_SR & LCD_SR_ENS) == 0);
}
void lcd_wait_step_up_ready(void)
{
while ((LCD_SR & LCD_SR_RDY) == 0);
}
void lcd_wait_for_update_ready(void)
{
while ((LCD_SR & LCD_SR_UDR) != 0);
}
void lcd_update(void)
{
LCD_SR |= LCD_SR_UDR;
}