sambuc/raspberrypi
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

adding video01 video framebuffer basics

Browse Source
This commit is contained in:
dwelch67
2014-01-31 14:50:06 -05:00
parent e775dd3081
commit b83adce143
7 changed files with 943 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

68
video01/Makefile Normal file
View File

@@ -0,0 +1,68 @@
ARMGNU ?= arm-none-eabi
COPS = -Wall -O2 -nostdlib -nostartfiles -ffreestanding
gcc : kernel.img
all : gcc clang
clean :
rm -f *.o
rm -f *.bin
rm -f *.hex
rm -f *.elf
rm -f *.list
rm -f *.img
rm -f *.bc
rm -f *.clang.s
vectors.o : vectors.s
$(ARMGNU)-as vectors.s -o vectors.o
video01.o : video01.c image_data.h
$(ARMGNU)-gcc $(COPS) -c video01.c -o video01.o
periph.o : periph.c
$(ARMGNU)-gcc $(COPS) -c periph.c -o periph.o
kernel.img : loader vectors.o periph.o video01.o
$(ARMGNU)-ld vectors.o periph.o video01.o -T loader -o video01.elf
$(ARMGNU)-objdump -D video01.elf > video01.list
$(ARMGNU)-objcopy video01.elf -O ihex video01.hex
$(ARMGNU)-objcopy video01.elf -O binary kernel.img
LOPS = -Wall -m32 -emit-llvm
LLCOPS0 = -march=arm
LLCOPS1 = -march=arm -mcpu=arm1176jzf-s
LLCOPS = $(LLCOPS1)
COPS = -Wall -O2 -nostdlib -nostartfiles -ffreestanding
OOPS = -std-compile-opts
clang : video01.bin
video01.bc : video01.c image_data.h
clang $(LOPS) -c video01.c -o video01.bc
periph.bc : periph.c
clang $(LOPS) -c periph.c -o periph.bc
video01.clang.elf : loader vectors.o video01.bc periph.bc
llvm-link periph.bc video01.bc -o video01.nopt.bc
opt $(OOPS) video01.nopt.bc -o video01.opt.bc
#llc $(LLCOPS) video01.opt.bc -o video01.clang.s
#$(ARMGNU)-as video01.clang.s -o video01.clang.o
llc $(LLCOPS) -filetype=obj video01.opt.bc -o video01.clang.o
$(ARMGNU)-ld -o video01.clang.elf -T loader vectors.o video01.clang.o
$(ARMGNU)-objdump -D video01.clang.elf > video01.clang.list
video01.bin : video01.clang.elf
$(ARMGNU)-objcopy video01.clang.elf video01.clang.bin -O binary

7
video01/README Normal file
View File

@@ -0,0 +1,7 @@
See the top level README file for more information on documentation
and how to run these programs.
Raspberry Pi video frame buffer basics.

483
video01/image_data.h Normal file
View File

File diff suppressed because one or more lines are too long

12
video01/loader Normal file
View File

@@ -0,0 +1,12 @@
MEMORY
{
ram : ORIGIN = 0x8000, LENGTH = 0x1000000
}
SECTIONS
{
.text : { *(.text*) } > ram
.bss : { *(.bss*) } > ram
}

151
video01/periph.c Normal file
View File

@@ -0,0 +1,151 @@
//-------------------------------------------------------------------------
//-------------------------------------------------------------------------
extern void PUT32 ( unsigned int, unsigned int );
extern void PUT16 ( unsigned int, unsigned int );
extern void PUT8 ( unsigned int, unsigned int );
extern unsigned int GET32 ( unsigned int );
extern void BRANCHTO ( unsigned int );
extern void dummy ( unsigned int );
#define ARM_TIMER_CTL 0x2000B408
#define ARM_TIMER_CNT 0x2000B420
#define GPFSEL1 0x20200004
#define GPSET0 0x2020001C
#define GPCLR0 0x20200028
#define GPPUD 0x20200094
#define GPPUDCLK0 0x20200098
#define AUX_ENABLES 0x20215004
#define AUX_MU_IO_REG 0x20215040
#define AUX_MU_IER_REG 0x20215044
#define AUX_MU_IIR_REG 0x20215048
#define AUX_MU_LCR_REG 0x2021504C
#define AUX_MU_MCR_REG 0x20215050
#define AUX_MU_LSR_REG 0x20215054
#define AUX_MU_MSR_REG 0x20215058
#define AUX_MU_SCRATCH 0x2021505C
#define AUX_MU_CNTL_REG 0x20215060
#define AUX_MU_STAT_REG 0x20215064
#define AUX_MU_BAUD_REG 0x20215068
//GPIO14 TXD0 and TXD1
//GPIO15 RXD0 and RXD1
//------------------------------------------------------------------------
unsigned int uart_lcr ( void )
{
return(GET32(AUX_MU_LSR_REG));
}
//------------------------------------------------------------------------
unsigned int uart_recv ( void )
{
while(1)
{
if(GET32(AUX_MU_LSR_REG)&0x01) break;
}
return(GET32(AUX_MU_IO_REG)&0xFF);
}
//------------------------------------------------------------------------
unsigned int uart_check ( void )
{
if(GET32(AUX_MU_LSR_REG)&0x01) return(1);
return(0);
}
//------------------------------------------------------------------------
void uart_send ( unsigned int c )
{
while(1)
{
if(GET32(AUX_MU_LSR_REG)&0x20) break;
}
PUT32(AUX_MU_IO_REG,c);
}
//------------------------------------------------------------------------
void uart_flush ( void )
{
while(1)
{
if((GET32(AUX_MU_LSR_REG)&0x100)==0) break;
}
}
//------------------------------------------------------------------------
void hexstrings ( unsigned int d )
{
//unsigned int ra;
unsigned int rb;
unsigned int rc;
rb=32;
while(1)
{
rb-=4;
rc=(d>>rb)&0xF;
if(rc>9) rc+=0x37; else rc+=0x30;
uart_send(rc);
if(rb==0) break;
}
uart_send(0x20);
}
//------------------------------------------------------------------------
void hexstring ( unsigned int d )
{
hexstrings(d);
uart_send(0x0D);
uart_send(0x0A);
}
//------------------------------------------------------------------------
void uart_init ( void )
{
unsigned int ra;
PUT32(AUX_ENABLES,1);
PUT32(AUX_MU_IER_REG,0);
PUT32(AUX_MU_CNTL_REG,0);
PUT32(AUX_MU_LCR_REG,3);
PUT32(AUX_MU_MCR_REG,0);
PUT32(AUX_MU_IER_REG,0);
PUT32(AUX_MU_IIR_REG,0xC6);
PUT32(AUX_MU_BAUD_REG,270);
ra=GET32(GPFSEL1);
ra&=~(7<<12); //gpio14
ra|=2<<12; //alt5
ra&=~(7<<15); //gpio15
ra|=2<<15; //alt5
PUT32(GPFSEL1,ra);
PUT32(GPPUD,0);
for(ra=0;ra<150;ra++) dummy(ra);
PUT32(GPPUDCLK0,(1<<14)|(1<<15));
for(ra=0;ra<150;ra++) dummy(ra);
PUT32(GPPUDCLK0,0);
PUT32(AUX_MU_CNTL_REG,3);
}
//------------------------------------------------------------------------
void timer_init ( void )
{
//0xF9+1 = 250
//250MHz/250 = 1MHz
PUT32(ARM_TIMER_CTL,0x00F90000);
PUT32(ARM_TIMER_CTL,0x00F90200);
}
//-------------------------------------------------------------------------
unsigned int timer_tick ( void )
{
return(GET32(ARM_TIMER_CNT));
}
//-------------------------------------------------------------------------
//-------------------------------------------------------------------------
//-------------------------------------------------------------------------
//
// Copyright (c) 2012 David Welch dwelch@dwelch.com
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
//-------------------------------------------------------------------------

55
video01/vectors.s Normal file
View File

@@ -0,0 +1,55 @@
;@-------------------------------------------------------------------------
;@-------------------------------------------------------------------------
.globl _start
_start:
mov sp,#0x8000
bl notmain
hang: b hang
.globl PUT32
PUT32:
str r1,[r0]
bx lr
.globl PUT16
PUT16:
strh r1,[r0]
bx lr
.globl PUT8
PUT8:
strb r1,[r0]
bx lr
.globl GET32
GET32:
ldr r0,[r0]
bx lr
.globl GETPC
GETPC:
mov r0,lr
bx lr
.globl dummy
dummy:
bx lr
;@-------------------------------------------------------------------------
;@-------------------------------------------------------------------------
;@-------------------------------------------------------------------------
;@
;@ Copyright (c) 2012 David Welch dwelch@dwelch.com
;@
;@ Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
;@
;@ The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
;@
;@ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
;@
;@-------------------------------------------------------------------------

167
video01/video01.c Normal file
View File

@@ -0,0 +1,167 @@
//-------------------------------------------------------------------------
//-------------------------------------------------------------------------
// 2 outer corner
// 4
// 6
// 8 TX out
// 10 RX in
// The raspberry pi firmware at the time this was written defaults
// loading at address 0x8000. Although this bootloader could easily
// load at 0x0000, it loads at 0x8000 so that the same binaries built
// for the SD card work with this bootloader. Change the ARMBASE
// below to use a different location.
#include "image_data.h"
extern void PUT32 ( unsigned int, unsigned int );
extern void PUT16 ( unsigned int, unsigned int );
extern void PUT8 ( unsigned int, unsigned int );
extern unsigned int GET32 ( unsigned int );
extern unsigned int GETPC ( void );
extern void BRANCHTO ( unsigned int );
extern void dummy ( unsigned int );
extern void uart_init ( void );
extern unsigned int uart_lcr ( void );
extern void uart_flush ( void );
extern void uart_send ( unsigned int );
extern unsigned int uart_recv ( void );
extern unsigned int uart_check ( void );
extern void hexstring ( unsigned int );
extern void hexstrings ( unsigned int );
extern void timer_init ( void );
extern unsigned int timer_tick ( void );
extern void timer_init ( void );
extern unsigned int timer_tick ( void );
unsigned int MailboxWrite ( unsigned int fbinfo_addr, unsigned int channel )
{
unsigned int mailbox;
mailbox=0x2000B880;
while(1)
{
if((GET32(mailbox+0x18)&0x80000000)==0) break;
}
PUT32(mailbox+0x20,fbinfo_addr+channel);
return(0);
}
unsigned int MailboxRead ( unsigned int channel )
{
unsigned int ra;
unsigned int mailbox;
mailbox=0x2000B880;
while(1)
{
while(1)
{
ra=GET32(mailbox+0x18);
if((ra&0x40000000)==0) break;
}
//hexstrings(ra);
ra=GET32(mailbox+0x00);
//hexstring(ra);
if((ra&0xF)==channel) break;
}
return(ra);
}
//------------------------------------------------------------------------
int notmain ( void )
{
unsigned int ra,rb;
unsigned int ry,rx;
uart_init();
hexstring(0x12345678);
hexstring(GETPC());
timer_init();
PUT32(0x40040000, 640); /* #0 Physical Width */
PUT32(0x40040004, 480); /* #4 Physical Height */
PUT32(0x40040008, 640); /* #8 Virtual Width */
PUT32(0x4004000C, 480); /* #12 Virtual Height */
PUT32(0x40040010, 0); /* #16 GPU - Pitch */
PUT32(0x40040014, 32); /* #20 Bit Depth */
PUT32(0x40040018, 0); /* #24 X */
PUT32(0x4004001C, 0); /* #28 Y */
PUT32(0x40040020, 0); /* #32 GPU - Pointer */
PUT32(0x40040024, 0); /* #36 GPU - Size */
hexstring(MailboxWrite(0x40040000,1));
hexstring(MailboxRead(1));
rb=0x40040000;
for(ra=0;ra<10;ra++)
{
hexstrings(rb); hexstring(GET32(rb));
rb+=4;
}
rb=GET32(0x40040020);
hexstring(rb);
for(ra=0;ra<10000;ra++)
{
PUT32(rb,~((ra&0xFF)<<0));
rb+=4;
}
for(ra=0;ra<10000;ra++)
{
PUT32(rb,~((ra&0xFF)<<8));
rb+=4;
}
for(ra=0;ra<10000;ra++)
{
PUT32(rb,~((ra&0xFF)<<16));
rb+=4;
}
for(ra=0;ra<10000;ra++)
{
PUT32(rb,~((ra&0xFF)<<24));
rb+=4;
}
rb=GET32(0x40040020);
hexstring(rb);
ra=0;
for(ry=0;ry<480;ry++)
{
for(rx=0;rx<480;rx++)
{
PUT32(rb,image_data[ra++]);
rb+=4;
}
for(;rx<640;rx++)
{
PUT32(rb,0);
rb+=4;
}
}
return(0);
}
//-------------------------------------------------------------------------
//-------------------------------------------------------------------------
//-------------------------------------------------------------------------
//
// Copyright (c) 2012 David Welch dwelch@dwelch.com
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
//-------------------------------------------------------------------------