From 81fe625a6205e9a0a103e76bed13e4701205cf97 Mon Sep 17 00:00:00 2001 From: Rafaël Carré Date: Thu, 27 Nov 2008 21:07:54 +0000 Subject: Sansa Clip: grey lib support (not calibrated yet) Declare HAVE_LCD_INVERT Put the framebuffer into IRAM git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19249 a1c6a512-1295-4272-9138-f99709370657 --- .../target/arm/as3525/sansa-clip/lcd-as-clip.S | 99 ++++++++++++++++++++++ .../target/arm/as3525/sansa-clip/lcd-ssd1303.c | 30 ++++--- 2 files changed, 117 insertions(+), 12 deletions(-) create mode 100644 firmware/target/arm/as3525/sansa-clip/lcd-as-clip.S (limited to 'firmware/target/arm/as3525') diff --git a/firmware/target/arm/as3525/sansa-clip/lcd-as-clip.S b/firmware/target/arm/as3525/sansa-clip/lcd-as-clip.S new file mode 100644 index 0000000000..aab46861ba --- /dev/null +++ b/firmware/target/arm/as3525/sansa-clip/lcd-as-clip.S @@ -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 diff --git a/firmware/target/arm/as3525/sansa-clip/lcd-ssd1303.c b/firmware/target/arm/as3525/sansa-clip/lcd-ssd1303.c index f1e1c24b85..703b7e1307 100644 --- a/firmware/target/arm/as3525/sansa-clip/lcd-ssd1303.c +++ b/firmware/target/arm/as3525/sansa-clip/lcd-ssd1303.c @@ -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. -- cgit v1.2.3