http://nano.lichee.pro/
https://mangopi.org/mangopi_r
https://www.allwinnertech.com/index.php?c=product&a=index&pid=4
Work Flow
暫存器
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
Work Flow
暫存器
main.s
.global _start
.equiv PIO_BASE, 0x01c20800
.equiv TIMER_BASE, 0x01c20c00
.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 PORT_CFG0, 0x00
.equiv PORT_DATA, 0x10
.equiv WDOG_IRQ_EN_REG, 0xa0
.equiv WDOG_IRQ_STA_REG, 0xa4
.equiv WDOG_CTRL_REG, 0xb0
.equiv WDOG_CFG_REG, 0xb4
.equiv WDOG_MODE_REG, 0xb8
.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:
bl lcd_init
ldr r0, =TIMER_BASE
ldr r1, =(0xa57 << 1) | 1
str r1, [r0, #WDOG_CTRL_REG]
ldr r1, =1
str r1, [r0, #WDOG_CFG_REG]
ldr r1, =(3 << 4) | 1
str r1, [r0, #WDOG_MODE_REG]
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}
lcd_color:
push {r4, r5, lr}
ldr r4, =320*240
mov r5, r0
0:
mov r0, r5
bl lcd_dat
subs r4, #1
bne 0b
pop {r4, r5, pc}
lcd_init:
push {r4, lr}
ldr r4, =PIO_BASE + PD
ldr r1, [r4, #PIO_CFG0]
bic r1, #0xfffffff0
ldr r2, =0x11111110
orr r1, r2
str r1, [r4, #PIO_CFG0]
ldr r1, [r4, #PIO_CFG1]
bic r1, #0xffffff0f
ldr r2, =0x11111101
orr r1, r2
str r1, [r4, #PIO_CFG1]
ldr r1, [r4, #PIO_CFG2]
bic r1, #0x00ffffff
ldr r2, =0x00111111
orr r1, r2
str r1, [r4, #PIO_CFG2]
ldr r4, =PIO_BASE + PE
ldr r1, [r4, #PIO_CFG0]
bic r1, #0x0f000000
orr r1, #0x01000000
str r1, [r4, #PIO_CFG0]
ldr r1, [r4, #PIO_CFG1]
bic r1, #0x0000f000
orr r1, #0x00001000
str r1, [r4, #PIO_CFG1]
ldr r4, =PIO_BASE + PD
ldr r1, [r4, #PIO_DATA]
ldr r2, =0x003ffdfe
orr r1, r2
str r1, [r4, #PIO_DATA]
ldr r4, =PIO_BASE + PE
ldr r1, [r4, #PIO_DATA]
orr r1, #(1 << 11) | (1 << 6)
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
pop {r4, pc}
.end
P.S. 點亮屏後，等待Watchdog(1秒)去重啟系統，達到閃屏的效果
完成
