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adding blinker03 example for A+

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dwelch
2016-03-16 20:38:03 -04:00
parent 9ddb8b8fb2
commit 97dac0a790
5 changed files with 216 additions and 0 deletions
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69
piaplus/blinker03/Makefile Normal file
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ARMGNU ?= arm-none-eabi
COPS = -Wall -O2 -nostdlib -nostartfiles -ffreestanding
gcc : blinker03.hex blinker03.bin
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.opt.s
vectors.o : vectors.s
$(ARMGNU)-as vectors.s -o vectors.o
blinker03.o : blinker03.c
$(ARMGNU)-gcc $(COPS) -c blinker03.c -o blinker03.o
blinker03.elf : memmap vectors.o blinker03.o
$(ARMGNU)-ld vectors.o blinker03.o -T memmap -o blinker03.elf
$(ARMGNU)-objdump -D blinker03.elf > blinker03.list
blinker03.bin : blinker03.elf
$(ARMGNU)-objcopy blinker03.elf -O binary blinker03.bin
blinker03.hex : blinker03.elf
$(ARMGNU)-objcopy blinker03.elf -O ihex blinker03.hex
LOPS = -Wall -m32 -emit-llvm
LLCOPS = -march=arm -mcpu=arm1176jzf-s
LLCOPS0 = -march=arm
LLCOPS1 = -march=arm -mcpu=arm1176jzf-s
COPS = -Wall -O2 -nostdlib -nostartfiles -ffreestanding
OOPSx = -std-compile-opts
OOPS = -std-link-opts
clang : blinker03.clang.hex blinker03.clang.bin
blinker03.clang.bc : blinker03.c
clang $(LOPS) -c blinker03.c -o blinker03.clang.bc
blinker03.clang.opt.elf : memmap vectors.o blinker03.clang.bc
opt $(OOPS) blinker03.clang.bc -o blinker03.clang.opt.bc
llc $(LLCOPS) blinker03.clang.opt.bc -o blinker03.clang.opt.s
$(ARMGNU)-as blinker03.clang.opt.s -o blinker03.clang.opt.o
$(ARMGNU)-ld -o blinker03.clang.opt.elf -T memmap vectors.o blinker03.clang.opt.o
$(ARMGNU)-objdump -D blinker03.clang.opt.elf > blinker03.clang.opt.list
blinker03.clang.hex : blinker03.clang.opt.elf
$(ARMGNU)-objcopy blinker03.clang.opt.elf blinker03.clang.hex -O ihex
blinker03.clang.bin : blinker03.clang.opt.elf
$(ARMGNU)-objcopy blinker03.clang.opt.elf blinker03.clang.bin -O binary

16
piaplus/blinker03/README Normal file
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See the top level README for information on where to find documentation
for the raspberry pi and the ARM processor inside. Also find information
on how to load and run these programs.
This example is for the pi A+, see other directories for other flavors
of raspberry pi.
This example uses the free running ARM timer, not the 64 bit system
timer as in blinker02 but the so called ARM timer. In free running mode
which is a little different from blinker04 which uses the timer mode.
The system clock appears to come up at 250MHz as documented. Divide that
by 250 to get 1Mhz on this free running ARM timer. Then count to four
million ticks between LED state changes and the led will change state
every four seconds. Count to 20 million, 20 seconds.

82
piaplus/blinker03/blinker03.c Normal file
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//-------------------------------------------------------------------------
//-------------------------------------------------------------------------
extern void PUT32 ( unsigned int, unsigned int );
extern unsigned int GET32 ( unsigned int );
extern void dummy ( unsigned int );
#define ARM_TIMER_LOD 0x2000B400
#define ARM_TIMER_VAL 0x2000B404
#define ARM_TIMER_CTL 0x2000B408
#define ARM_TIMER_DIV 0x2000B41C
#define ARM_TIMER_CNT 0x2000B420
#define SYSTIMERCLO 0x20003004
#define GPFSEL1 0x20200004
#define GPSET0 0x2020001C
#define GPCLR0 0x20200028
#define GPFSEL3 0x2020000C
#define GPFSEL4 0x20200010
#define GPSET1 0x20200020
#define GPCLR1 0x2020002C
//#define TIMEOUT 20000000
#define TIMEOUT 4000000
//-------------------------------------------------------------------------
int notmain ( void )
{
unsigned int ra;
unsigned int rb;
ra=GET32(GPFSEL4);
ra&=~(7<<21);
ra|=1<<21;
PUT32(GPFSEL4,ra);
ra=GET32(GPFSEL3);
ra&=~(7<<15);
ra|=1<<15;
PUT32(GPFSEL3,ra);
PUT32(ARM_TIMER_CTL,0x00F90000);
PUT32(ARM_TIMER_CTL,0x00F90200);
rb=GET32(ARM_TIMER_CNT);
while(1)
{
PUT32(GPSET1,1<<(47-32));
PUT32(GPCLR1,1<<(35-32));
while(1)
{
ra=GET32(ARM_TIMER_CNT);
if((ra-rb)>=TIMEOUT) break;
}
rb+=TIMEOUT;
PUT32(GPCLR1,1<<(47-32));
PUT32(GPSET1,1<<(35-32));
while(1)
{
ra=GET32(ARM_TIMER_CNT);
if((ra-rb)>=TIMEOUT) break;
}
rb+=TIMEOUT;
}
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.
//
//-------------------------------------------------------------------------

11
piaplus/blinker03/memmap Normal file
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MEMORY
{
ram : ORIGIN = 0x8000, LENGTH = 0x1000
}
SECTIONS
{
.text : { *(.text*) } > ram
.bss : { *(.bss*) } > ram
}

38
piaplus/blinker03/vectors.s Normal file
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;@-------------------------------------------------------------------------
;@-------------------------------------------------------------------------
.globl _start
_start:
mov sp,#0x8000
bl notmain
hang: b hang
.globl PUT32
PUT32:
str r1,[r0]
bx lr
.globl GET32
GET32:
ldr r0,[r0]
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.
;@
;@-------------------------------------------------------------------------