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Sansa Clip: grey lib support (not calibrated yet)

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Declare HAVE_LCD_INVERT
Put the framebuffer into IRAM

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19249 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Rafaël Carré 2008-11-27 21:07:54 +00:00
parent 6d34e33b94
commit 81fe625a62
5 changed files with 142 additions and 12 deletions
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21
apps/plugins/lib/grey_core.c
View file

@ -207,6 +207,27 @@ static const unsigned char lcdlinear[256] = {
};
#define LCD_SCANRATE 51 /* Hz */
#elif defined SANSA_CLIP /* NOT verified */
static const unsigned char lcdlinear[256] = {
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127,
128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143,
144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175,
176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191,
192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207,
208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223,
224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239,
240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 254, 255
};
#define LCD_SCANRATE 78 /* Hz */
#else /* not yet calibrated targets - generic linear mapping */
/* TODO: calibrate iFP7xx */
static const unsigned char lcdlinear[256] = {

1
firmware/SOURCES
View file

@ -1068,6 +1068,7 @@ target/arm/pcm-telechips.c
#ifdef SANSA_CLIP
#ifndef SIMULATOR
target/arm/as3525/sansa-clip/lcd-ssd1303.c
target/arm/as3525/sansa-clip/lcd-as-clip.S
target/arm/as3525/sansa-clip/button-clip.c
target/arm/as3525/sansa-clip/backlight-clip.c
target/arm/as3525/as3525-codec.c

5
firmware/export/config-clip.h
View file

@ -61,6 +61,9 @@
/* define this if you can flip your LCD */
#define HAVE_LCD_FLIP
/* define this if you can invert the pixels */
#define HAVE_LCD_INVERT
/* Define this if your LCD can set contrast */
#define HAVE_LCD_CONTRAST
@ -68,7 +71,7 @@
#define MAX_CONTRAST_SETTING 50
#define DEFAULT_CONTRAST_SETTING 30
/* #define IRAM_LCDFRAMEBUFFER IDATA_ATTR *//* put the lcd frame buffer in IRAM */
#define IRAM_LCDFRAMEBUFFER IDATA_ATTR /* put the lcd frame buffer in IRAM */
#define CONFIG_KEYPAD SANSA_CLIP_PAD

99
firmware/target/arm/as3525/sansa-clip/lcd-as-clip.S Normal file
View file

@ -0,0 +1,99 @@
/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2008 by Jens Arnold
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "as3525.h"
.text
.align 2
.global lcd_grey_data
.type lcd_grey_data,%function
/* A high performance function to write grey phase data to the display,
* one or multiple pixels.
*
* Arguments:
* r0 - pixel value data address
* r1 - pixel phase data address
* r2 - pixel block count
*
* Register usage:
* r3/r4 - current block of phases
* r5/r6 - current block of values
* r7 - lcd data accumulator
* r8 - phase signs mask
* lr - lcd bridge address
*/
lcd_grey_data:
stmfd sp!, {r4-r8, lr}
mov r8, #0x80
orr r8, r8, r8, lsl #8
orr r8, r8, r8, lsl #16
ldr lr, =GPIOA_BASE
mov r3, #(1<<5)
str r3, [lr, #(4*(1<<5))] @ set pin D/C# of LCD controller (data)
ldr lr, =DBOP_BASE
.greyloop:
ldmia r1, {r3-r4} /* Fetch 8 pixel phases */
ldmia r0!, {r5-r6} /* Fetch 8 pixel values */
mov r7, #0xff
tst r3, #0x80
biceq r7, r7, #0x80
tst r3, #0x8000
biceq r7, r7, #0x40
tst r3, #0x800000
biceq r7, r7, #0x20
tst r3, #0x80000000
biceq r7, r7, #0x10
bic r3, r3, r8
add r3, r3, r5
tst r4, #0x80
biceq r7, r7, #0x08
tst r4, #0x8000
biceq r7, r7, #0x04
tst r4, #0x800000
biceq r7, r7, #0x02
tst r4, #0x80000000
biceq r7, r7, #0x01
bic r4, r4, r8
add r4, r4, r6
stmia r1!, {r3-r4}
orr r7, r7, r7, lsl #8 @ we set 15:13 to the MSb and 3:0 to the LSb
strh r7, [lr, #0x10] @ DBOP_DOUT
1:
ldr r5, [lr, #0xC] @ DBOP_STAT
ands r5, r5, #(1<<10) @ wait until push fifo empties
beq 1b
subs r2, r2, #1
bne .greyloop
ldmfd sp!, {r4-r8, pc}
.size lcd_grey_data,.-lcd_grey_data

28
firmware/target/arm/as3525/sansa-clip/lcd-ssd1303.c
View file

@ -88,6 +88,7 @@ void lcd_write_command(int byte)
GPIOA_PIN(5) = 0;
/* Write command */
/* Only bits 15:12 and 3:0 of DBOP_DOUT are meaningful */
DBOP_DOUT = (byte << 8) | byte;
/* While push fifo is not empty */
@ -103,6 +104,7 @@ void lcd_write_data(const fb_data* p_bytes, int count)
while (count--)
{
/* Write pixels */
/* Only bits 15:12 and 3:0 of DBOP_DOUT are meaningful */
DBOP_DOUT = (*p_bytes << 8) | *p_bytes;
p_bytes++; /* next packed pixels */
@ -266,26 +268,30 @@ void lcd_blit_mono(const unsigned char *data, int x, int by, int width,
}
}
/* Helper function for lcd_grey_phase_blit(). */
void lcd_grey_data(unsigned char *values, unsigned char *phases, int count);
/* Performance function that works with an external buffer
note that by and bheight are in 8-pixel units! */
void lcd_blit_grey_phase(unsigned char *values, unsigned char *phases,
int x, int by, int width, int bheight, int stride)
{
/* TODO */
#if 0
if(!display_on)
return;
#endif
(void)values;
(void)phases;
(void)x;
(void)by;
(void)width;
(void)bheight;
(void)stride;
stride <<= 3; /* 8 pixels per block */
/* Copy display bitmap to hardware */
while (bheight--)
{
lcd_write_command (LCD_CNTL_PAGE | (by++ & 0xf));
lcd_write_command (LCD_CNTL_HIGHCOL | (((x+2+xoffset)>>4) & 0xf));
lcd_write_command (LCD_CNTL_LOWCOL | ((x+2+xoffset) & 0xf));
lcd_grey_data(values, phases, width);
values += stride;
phases += stride;
}
}
/* Update the display.