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
F1C100S分成FIQ、IRQ兩種中斷，EXT_INT是FIQ中斷，其餘都是IRQ中斷，比較特別的地方是可以透過設定INT_FORCE(INTC_FF_REG)，強制觸發IRQ中斷
暫存器
Number代表第幾個bit，如：UART2是3，因此，要Enable UART2中斷的話，則需要設定bit-3(INTC_EN_REG0|= (1 << 3))，Vector代表中斷觸發的來源，也就是儲存在INTC_VECTOR_REG的數值，如：UART2是0x000c，因此，UART2中斷觸發後，INTC_VECTOR_REG內容就是0x000c
main.s
.global _start
.equiv PIO_BASE, 0x01c20800
.equiv INTC_BASE, 0x01c20400
.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 INTC_BASE_ADDR_REG, 0x04
.equiv INTC_PEND_REG0, 0x10
.equiv INTC_PEND_REG1, 0x14
.equiv INTC_EN_REG0, 0x20
.equiv INTC_EN_REG1, 0x24
.equiv INTC_MASK_REG0, 0x30
.equiv INTC_MASK_REG1, 0x34
.equiv INTC_RESP_REG0, 0x40
.equiv INTC_RESP_REG1, 0x44
.equiv INTC_FF_REG0, 0x50
.equiv INTC_FF_REG1, 0x54
.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 .
ldr pc, _irq
b .
_irq: .word irq_handler
irq_handler:
eor r6, #0x1f
ldr r0, =INTC_BASE
ldr r1, =0x00000000
str r1, [r0, #INTC_FF_REG0]
ldr r1, =0xffffffff
str r1, [r0, #INTC_PEND_REG0]
subs pc, lr, #4
reset:
mrc p15, 0, r0, c1, c0, 0
bic r0, #(1 << 13)
mcr p15, 0, r0, c1, c0, 0
adr r0, _vector
mrc p15, 0, r2, c1, c0, 0
ands r2, r2, #(1 << 13)
ldreq r1, =0x00000000
ldrne r1, =0xffff0000
ldmia r0!, {r2-r8, r10}
stmia r1!, {r2-r8, r10}
ldmia r0!, {r2-r8, r10}
stmia r1!, {r2-r8, r10}
mrs r0, cpsr
bic r0, #0x80
msr cpsr_c, r0
ldr r0, =INTC_BASE
ldr r1, =(1 << 3)
str r1, [r0, #INTC_EN_REG0]
ldr r1, =0x00000000
str r1, [r0, #INTC_MASK_REG0]
bl lcd_init
mov r6, #0
0:
mov r0, r6
bl lcd_color
ldr r0, =INTC_BASE
ldr r1, =(1 << 3)
str r1, [r0, #INTC_FF_REG0]
b 0b
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
完成
