main.s
參考資料：
http://nano.lichee.pro/
https://mangopi.org/mangopi_r
https://www.allwinnertech.com/index.php?c=product&a=index&pid=4
由於FC3000掌機的LED並非由F1C100S控制，因此，司徒只好把屏的控制當作第一個LED練習，LCD腳位如下：
| LCD BK | PE6 |
| LCD RST | PE11 |
| LCD CS | PD21 |
| LCD RS | PD19 |
| LCD WR | PD18 |
| LCD DB11 | PD13 |
| LCD DB12 | PD14 |
| LCD DB13 | PD15 |
| LCD DB14 | PD16 |
| LCD DB15 | PD17 |
| LCD DB5 | PD6 |
| LCD DB6 | PD7 |
| LCD DB7 | PD8 |
| LCD DB8 | PD10 |
| LCD DB9 | PD11 |
| LCD DB10 | PD12 |
| LCD DB0 | PD1 |
| LCD DB1 | PD2 |
| LCD DB2 | PD3 |
| LCD DB3 | PD4 |
| LCD DB4 | PD5 |
暫存器
main.s
.global _start
.equiv PIO_BASE, 0x01c20800
.equiv PD, (0x24 * 3)
.equiv PE, (0x24 * 4)
.equiv PIO_CFG0, 0x00
.equiv PIO_CFG1, 0x04
.equiv PIO_CFG2, 0x08
.equiv PIO_DATA, 0x10
.equiv LCD_CS, (1 << 21)
.equiv LCD_RD, (1 << 20)
.equiv LCD_RS, (1 << 19)
.equiv LCD_WR, (1 << 18)
.equiv LCD_RST, (1 << 11)
.equiv LCD_BL, (1 << 6)
.arm
.text
_start:
.long 0xea000016
.byte 'e', 'G', 'O', 'N', '.', 'B', 'T', '0'
.long 0, __spl_size
.byte 'S', 'P', 'L', 2
.long 0, 0
.long 0, 0, 0, 0, 0, 0, 0, 0
.long 0, 0, 0, 0, 0, 0, 0, 0
_vector:
b reset
b .
b .
b .
b .
b .
b .
b .
reset:
ldr r4, =PIO_BASE + PD
ldr r1, =0x11111111
str r1, [r4, #PIO_CFG0]
str r1, [r4, #PIO_CFG1]
ldr r1, =0x00111111
str r1, [r4, #PIO_CFG2]
ldr r4, =PIO_BASE + PE
ldr r1, [r4, #PIO_CFG0]
bic r1, #0xf000000
orr r1, #0x1000000
str r1, [r4, #PIO_CFG0]
ldr r1, [r4, #PIO_CFG1]
bic r1, #0xf000
orr r1, #0x1000
str r1, [r4, #PIO_CFG1]
ldr r4, =PIO_BASE + PD
ldr r1, =0xffffffff
str r1, [r4, #PIO_DATA]
ldr r4, =PIO_BASE + PE
ldr r1, =0xffffffff
str r1, [r4, #PIO_DATA]
bl lcd_rst
ldr r0, =0x800
bl lcd_cmd
ldr r0, =0x100
bl lcd_dat
ldr r0, =0x1000
bl lcd_cmd
ldr r0, =0x700
bl lcd_dat
ldr r0, =0x1800
bl lcd_cmd
ldr r0, =0xc002
bl lcd_dat
ldr r0, =0x2000
bl lcd_cmd
ldr r0, =0x0
bl lcd_dat
ldr r0, =0x4000
bl lcd_cmd
ldr r0, =0x1200
bl lcd_dat
ldr r0, =0x4800
bl lcd_cmd
ldr r0, =0x0
bl lcd_dat
ldr r0, =0x5000
bl lcd_cmd
ldr r0, =0x0
bl lcd_dat
ldr r0, =0x6000
bl lcd_cmd
ldr r0, =0x0
bl lcd_dat
ldr r0, =0x6800
bl lcd_cmd
ldr r0, =0x0
bl lcd_dat
ldr r0, =0x7800
bl lcd_cmd
ldr r0, =0x0
bl lcd_dat
ldr r0, =0x8000
bl lcd_cmd
ldr r0, =0x0
bl lcd_dat
ldr r0, =0x8800
bl lcd_cmd
ldr r0, =0x3800
bl lcd_dat
ldr r0, =0x9000
bl lcd_cmd
ldr r0, =0x0
bl lcd_dat
ldr r0, =0x9800
bl lcd_cmd
ldr r0, =0x0
bl lcd_dat
ldr r0, =0x3800
bl lcd_cmd
ldr r0, =0x800
bl lcd_dat
ldr r0, =0x8000
bl lcd_cmd
ldr r0, =0x8682
bl lcd_dat
ldr r0, =0x8800
bl lcd_cmd
ldr r0, =0x3e60
bl lcd_dat
ldr r0, =0x9000
bl lcd_cmd
ldr r0, =0xc080
bl lcd_dat
ldr r0, =0x9800
bl lcd_cmd
ldr r0, =0x603
bl lcd_dat
ldr r0, =0x4820
bl lcd_cmd
ldr r0, =0xf000
bl lcd_dat
ldr r0, =0x5820
bl lcd_cmd
ldr r0, =0x7000
bl lcd_dat
ldr r0, =0x20
bl lcd_cmd
ldr r0, =0x0
bl lcd_dat
ldr r0, =0x820
bl lcd_cmd
ldr r0, =0x0
bl lcd_dat
ldr r0, =0x8020
bl lcd_cmd
ldr r0, =0x0
bl lcd_dat
ldr r0, =0x8820
bl lcd_cmd
ldr r0, =0x3d00
bl lcd_dat
ldr r0, =0x9020
bl lcd_cmd
ldr r0, =0x2000
bl lcd_dat
ldr r0, =0xa820
bl lcd_cmd
ldr r0, =0x2a00
bl lcd_dat
ldr r0, =0xb020
bl lcd_cmd
ldr r0, =0x2000
bl lcd_dat
ldr r0, =0xb820
bl lcd_cmd
ldr r0, =0x3b00
bl lcd_dat
ldr r0, =0xc020
bl lcd_cmd
ldr r0, =0x1000
bl lcd_dat
ldr r0, =0xc820
bl lcd_cmd
ldr r0, =0x3f00
bl lcd_dat
ldr r0, =0xe020
bl lcd_cmd
ldr r0, =0x1500
bl lcd_dat
ldr r0, =0xe820
bl lcd_cmd
ldr r0, =0x2000
bl lcd_dat
ldr r0, =0x8040
bl lcd_cmd
ldr r0, =0x0
bl lcd_dat
ldr r0, =0x8840
bl lcd_cmd
ldr r0, =0x78e0
bl lcd_dat
ldr r0, =0x9040
bl lcd_cmd
ldr r0, =0x0
bl lcd_dat
ldr r0, =0x9840
bl lcd_cmd
ldr r0, =0xf920
bl lcd_dat
ldr r0, =0x60
bl lcd_cmd
ldr r0, =0x714
bl lcd_dat
ldr r0, =0x860
bl lcd_cmd
ldr r0, =0x800
bl lcd_dat
ldr r0, =0x5060
bl lcd_cmd
ldr r0, =0x0
bl lcd_dat
ldr r0, =0x80
bl lcd_cmd
ldr r0, =0x0
bl lcd_dat
ldr r0, =0x880
bl lcd_cmd
ldr r0, =0x0
bl lcd_dat
ldr r0, =0x1080
bl lcd_cmd
ldr r0, =0x0
bl lcd_dat
ldr r0, =0x1880
bl lcd_cmd
ldr r0, =0x0
bl lcd_dat
ldr r0, =0x2080
bl lcd_cmd
ldr r0, =0x0
bl lcd_dat
ldr r0, =0x2880
bl lcd_cmd
ldr r0, =0x0
bl lcd_dat
ldr r0, =0x8080
bl lcd_cmd
ldr r0, =0x8000
bl lcd_dat
ldr r0, =0x9080
bl lcd_cmd
ldr r0, =0x600
bl lcd_dat
ldr r0, =0x1800
bl lcd_cmd
ldr r0, =0x4020
bl lcd_dat
ldr r0, =0x3800
bl lcd_cmd
ldr r0, =0x9920
bl lcd_dat
ldr r0, =0x8040
bl lcd_cmd
ldr r0, =0x0
bl lcd_dat
ldr r0, =0x8840
bl lcd_cmd
ldr r0, =0x78e0
bl lcd_dat
ldr r0, =0x9040
bl lcd_cmd
ldr r0, =0x0
bl lcd_dat
ldr r0, =0x9840
bl lcd_cmd
ldr r0, =0xf920
bl lcd_dat
ldr r0, =0x20
bl lcd_cmd
ldr r0, =0x78e0
bl lcd_dat
ldr r0, =0x820
bl lcd_cmd
ldr r0, =0x0
bl lcd_dat
ldr r0, =0x1020
bl lcd_cmd
ldr r4, =320*80
ldr r5, =0x1f
0:
mov r0, r5
bl lcd_dat
subs r4, #1
bne 0b
ldr r4, =320*80
ldr r5, =0x7e0
0:
mov r0, r5
bl lcd_dat
subs r4, #1
bne 0b
ldr r4, =320*80
ldr r5, =0xf800
0:
mov r0, r5
bl lcd_dat
subs r4, #1
bne 0b
b .
delay:
push {lr}
0:
subs r0, #1
bne 0b
pop {pc}
lcd_rst:
push {r4, r5, lr}
ldr r4, =PIO_BASE + PE
ldr r5, =0xffffffff
bic r5, #LCD_RST
str r5, [r4, #PIO_DATA]
ldr r0, =10000
bl delay
orr r5, #LCD_RST
str r5, [r4, #PIO_DATA]
ldr r0, =10000
bl delay
pop {r4, r5, pc}
lcd_wr:
push {r4, r5, lr}
ldr r4, =PIO_BASE + PD
and r2, r0, #0x00ff
and r3, r0, #0xff00
lsl r2, #1
lsl r3, #2
eor r5, r5
orr r5, r1
orr r5, r2
orr r5, r3
orr r5, #LCD_RD
str r5, [r4, #PIO_DATA]
orr r5, #LCD_WR
str r5, [r4, #PIO_DATA]
pop {r4, r5, pc}
lcd_dat:
push {lr}
mov r1, #LCD_RS
bl lcd_wr
pop {pc}
lcd_cmd:
push {lr}
mov r1, #0
bl lcd_wr
pop {pc}
.end
main.ld
OUTPUT_FORMAT("elf32-littlearm", "elf32-bigarm", "elf32-littlearm")
OUTPUT_ARCH(arm)
ENTRY(_start)
MEMORY {
ram : ORIGIN = 0x00000000, LENGTH = 32M
}
SECTIONS {
.text :
{
PROVIDE(__spl_start = .);
*(.text*)
PROVIDE(__spl_end = .);
*(.init.text)
*(.exit.text)
*(.glue*)
*(.note.gnu.build-id)
} > ram
PROVIDE(__spl_size = __spl_end - __spl_start);
.rodata ALIGN(8) :
{
PROVIDE(__rodata_start = .);
*(SORT_BY_ALIGNMENT(SORT_BY_NAME(.rodata*)))
PROVIDE(__rodata_end = .);
} > ram
.data ALIGN(8) :
{
PROVIDE(__data_start = .);
*(.data*)
. = ALIGN(8);
PROVIDE(__data_end = .);
PROVIDE(__image_end = .);
} > ram
.bss ALIGN(8) (NOLOAD) :
{
PROVIDE(__bss_start = .);
*(.bss*)
*(.sbss*)
*(COMMON)
. = ALIGN(8);
PROVIDE(__bss_end = .);
} > ram
.stab 0 : { *(.stab) }
.stabstr 0 : { *(.stabstr) }
.stab.excl 0 : { *(.stab.excl) }
.stab.exclstr 0 : { *(.stab.exclstr) }
.stab.index 0 : { *(.stab.index) }
.stab.indexstr 0 : { *(.stab.indexstr) }
.comment 0 : { *(.comment) }
.debug_abbrev 0 : { *(.debug_abbrev) }
.debug_info 0 : { *(.debug_info) }
.debug_line 0 : { *(.debug_line) }
.debug_pubnames 0 : { *(.debug_pubnames) }
.debug_aranges 0 : { *(.debug_aranges) }
}
Makefile
all: arm-none-eabi-as -mcpu=arm9 -o main.o main.s arm-none-eabi-ld -T main.ld -o main.elf main.o arm-none-eabi-objcopy -O binary main.elf main.bin gcc mksunxi.c -o mksunxi ./mksunxi main.bin flash: sudo dd if=main.bin of=/dev/sdX bs=1024 seek=8 clean: rm -rf main.bin main.o main.elf
P.S. sdX是記憶卡的位置，MicroSD前置請保留8MB
編譯
$ make
arm-none-eabi-as -mcpu=arm9 -o main.o main.s
arm-none-eabi-ld -T main.ld -o main.elf main.o
arm-none-eabi-objcopy -O binary main.elf main.bin
gcc mksunxi.c -o mksunxi
./mksunxi main.bin
The bootloader head has been fixed, spl size is 512 bytes.
接著插入MicroSD至PC，修改sdX位置，執行如下命令
$ make flash
sudo dd if=main.bin of=/dev/sdc bs=1024 seek=8
2+0 records in
2+0 records out
2048 bytes (2.0 kB, 2.0 KiB) copied, 0.0435819 s, 47.0 kB/s
將MicroSD插入FC3000，開機即可
