掌機 - FC3000 - Assembly - CCU

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

System Bus


Bus Clock Tree


Base Address


暫存器


速度

CPU速度計算公式

PLL = (24MHz*N*K)/(M*P)

N = 30
K = 1
M = 1
P = 1
PLL = (24MHz*30*1)/(1*1) = 720MHz

main.s

    .global _start
     
    .equiv CCU_BASE,  0x01c20000
    .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 PLL_CPU_CTRL_REG,      0x0000
    .equiv PLL_PERIPH_CTRL_REG,   0x0028
    .equiv CPU_CLK_SRC_REG,       0x0050
    .equiv AHB_APB_HCLKC_CFG_REG, 0x0054
    .equiv BUS_CLK_GATING_REG2,   0x0068
    .equiv BUS_SOFT_RST_REG2,     0x02d0
 
    .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, =CCU_BASE
    ldr r1, =(1 << 31) | (29 << 8)
    str r1, [r0, #PLL_CPU_CTRL_REG]
1:
    ldr r1, [r0, #PLL_CPU_CTRL_REG]
    tst r1, #(1 << 28)
    beq 1b
       
    ldr r0, =CCU_BASE
    ldr r1, =(3 << 16)
    str r1, [r0, #CPU_CLK_SRC_REG]

    ldr r0, =0xf800
    bl lcd_color

    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

完成