3520d8e90e
The LCD driver is unified and lcd_send_command now takes 2 arguments : the command and its argument.
If there is no argument, it's set to 0 and a NOP command is issued
If there is more than one argument (set X/Y address), the 2nd argument is sent as a 2nd command, and a NOP command is issued after it.
Benefit : c200v2 transfers the command and the argument in one 16 bits transfer
Performance should not be affected since commands without argument are only used in lcd_init() and lcd_enable()
lcd_send_data() now transfers whole lines (or columns) instead of single pixels
yuv is disabled for c200v2 for now
Some buttons can be read, including left button (bit 6 of DBOP_DIN), but for some reason they have no effect in rockbox: to be investigated
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21321 a1c6a512-1295-4272-9138-f99709370657
134 lines
3.8 KiB
C
134 lines
3.8 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id: button-e200v2.c 19035 2008-11-07 05:31:05Z jdgordon $
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*
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* Copyright (C) 2006 by Barry Wardell
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "system.h"
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#include "button-target.h"
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#include "button.h"
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#include "backlight.h"
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#include "powermgmt.h"
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unsigned short _dbop_din = 0;
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/* in the lcd driver */
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extern bool lcd_button_support(void);
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static bool hold_button = false;
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#ifndef BOOTLOADER
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static bool hold_button_old = false;
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#endif
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void button_init_device(void)
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{
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GPIOA_DIR &= ~(1<<3);
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}
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bool button_hold(void)
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{
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return hold_button;
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}
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static void button_read_dbop(void)
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{
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/* Set up dbop for input */
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DBOP_CTRL |= (1<<19); /* Tri-state DBOP on read cycle */
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DBOP_CTRL &= ~(1<<16); /* disable output (1:write enabled) */
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DBOP_TIMPOL_01 = 0xe167e167; /* Set Timing & Polarity regs 0 & 1 */
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DBOP_TIMPOL_23 = 0xe167006e; /* Set Timing & Polarity regs 2 & 3 */
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int i = 50;
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while(i--) asm volatile ("nop\n");
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DBOP_CTRL |= (1<<15); /* start read */
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while (!(DBOP_STAT & (1<<16))); /* wait for valid data */
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_dbop_din = DBOP_DIN; /* Read dbop data*/
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/* Reset dbop for output */
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DBOP_TIMPOL_01 = 0x6e167; /* Set Timing & Polarity regs 0 & 1 */
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DBOP_TIMPOL_23 = 0xa167e06f; /* Set Timing & Polarity regs 2 & 3 */
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DBOP_CTRL |= (1<<16); /* Enable output (0:write disable) */
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DBOP_CTRL &= ~(1<<19); /* Tri-state when no active write */
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}
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/*
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* Get button pressed from hardware
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*/
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int button_read_device(void)
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{
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int delay;
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int dir_save_c = 0;
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int afsel_save_c = 0;
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int btn = BUTTON_NONE;
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/* Save the current direction and afsel */
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dir_save_c = GPIOC_DIR;
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afsel_save_c = GPIOC_AFSEL;
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GPIOC_AFSEL &= ~(1<<6|1<<5|1<<4|1<<3);
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GPIOC_DIR |= (1<<6|1<<5|1<<4|1<<3);
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/* These should not be needed with button event interupts */
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/* they are necessary now to clear out lcd data */
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GPIOC_PIN(6) = (1<<6);
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GPIOC_PIN(5) = (1<<5);
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GPIOC_PIN(4) = (1<<4);
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GPIOC_PIN(3) = (1<<3);
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GPIOC_DIR &= ~(1<<6|1<<5|1<<4|1<<3);
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delay = 100;
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while(delay--)
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asm volatile("nop\n");
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/* direct GPIO connections */
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if (GPIOA_PIN(3))
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btn |= BUTTON_POWER;
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if (!GPIOC_PIN(6))
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btn |= BUTTON_RIGHT;
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if (!GPIOC_PIN(5))
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btn |= BUTTON_UP;
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if (!GPIOC_PIN(4))
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btn |= BUTTON_SELECT;
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if (!GPIOC_PIN(3))
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btn |= BUTTON_DOWN;
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/* return to settings needed for lcd */
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GPIOC_DIR = dir_save_c;
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GPIOC_AFSEL = afsel_save_c;
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if(lcd_button_support())
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button_read_dbop();
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if(_dbop_din & (1<<6))
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btn |= BUTTON_LEFT;
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#ifndef BOOTLOADER
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/* light handling */
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if (hold_button != hold_button_old)
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{
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hold_button_old = hold_button;
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backlight_hold_changed(hold_button);
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}
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#endif /* BOOTLOADER */
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return btn;
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}
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