Gaviar (小志掌機) >> Assembly
LCD
參考資訊：
1. ws2812c
2. Delay_slot
3. FlatHeadBro
LCD電路
main.s
.global _start
.equ GPIO_BASE, 0x02000000
.equ PD_CFG0, 0x0090
.equ PD_CFG1, 0x0094
.equ PD_CFG2, 0x0098
.equ PD_DAT, 0x00a0
.equ LCD_RST, (1 << 0)
.equ LCD_WR, (1 << 18)
.equ LCD_RS, (1 << 19)
.equ LCD_RD, (1 << 20)
.equ LCD_CS, (1 << 21)
.equ LCD_BL, (1 << 22)
.equ _250MS, 50000000
.equ _500MS, 100000000
.equ _1S, 200000000
.text
.long 0x4000006f
.byte 'e','G','O','N','.','B','T','0'
.long 0x5F0A6C39
.long 0x8000
.long 0, 0
.long 0, 0, 0, 0, 0, 0, 0, 0
.long 0, 0, 0, 0, 0, 0, 0, 0
.org 0x0400
_start:
li t0, 0x11111111
li a0, GPIO_BASE + PD_CFG0
sw t0, 0(a0)
li a0, GPIO_BASE + PD_CFG1
sw t0, 0(a0)
li a0, GPIO_BASE + PD_CFG2
sw t0, 0(a0)
li t0, 0xffffffff
li a0, GPIO_BASE + PD_DAT
sw t0, 0(a0)
jal lcd_rst
li t0, 0xb2
jal lcd_cmd
li t0, 0x5c
jal lcd_dat
li t0, 0x5c
jal lcd_dat
li t0, 0x00
jal lcd_dat
li t0, 0x33
jal lcd_dat
li t0, 0x33
jal lcd_dat
li t0, 0xb7
jal lcd_cmd
li t0, 0x35
jal lcd_dat
li t0, 0x21
jal lcd_cmd
li t0, 0x11
jal lcd_cmd
li t0, _250MS
jal delay
li t0, 0xe0
jal lcd_cmd
li t0, 0xd0
jal lcd_dat
li t0, 0x06
jal lcd_dat
li t0, 0x0b
jal lcd_dat
li t0, 0x07
jal lcd_dat
li t0, 0x07
jal lcd_dat
li t0, 0x24
jal lcd_dat
li t0, 0x2e
jal lcd_dat
li t0, 0x32
jal lcd_dat
li t0, 0x46
jal lcd_dat
li t0, 0x37
jal lcd_dat
li t0, 0x13
jal lcd_dat
li t0, 0x13
jal lcd_dat
li t0, 0x2d
jal lcd_dat
li t0, 0x33
jal lcd_dat
li t0, 0xe1
jal lcd_cmd
li t0, 0xd0
jal lcd_dat
li t0, 0x02
jal lcd_dat
li t0, 0x06
jal lcd_dat
li t0, 0x09
jal lcd_dat
li t0, 0x08
jal lcd_dat
li t0, 0x05
jal lcd_dat
li t0, 0x29
jal lcd_dat
li t0, 0x44
jal lcd_dat
li t0, 0x42
jal lcd_dat
li t0, 0x38
jal lcd_dat
li t0, 0x14
jal lcd_dat
li t0, 0x14
jal lcd_dat
li t0, 0x2a
jal lcd_dat
li t0, 0x30
jal lcd_dat
li t0, 0x36
jal lcd_cmd
li t0, 0xb0
jal lcd_dat
li t0, 0x2a
jal lcd_cmd
li t0, 0x00
jal lcd_dat
li t0, 0x00
jal lcd_dat
li t0, 0x01
jal lcd_dat
li t0, 0x3f
jal lcd_dat
li t0, 0x2b
jal lcd_cmd
li t0, 0x00
jal lcd_dat
li t0, 0x00
jal lcd_dat
li t0, 0x00
jal lcd_dat
li t0, 0xef
jal lcd_dat
li t0, 0x3a
jal lcd_cmd
li t0, 0x55
jal lcd_dat
li t0, 0x29
jal lcd_cmd
li t0, 0x2c
jal lcd_cmd
li t6, 320 * 80
red:
li t0, 0xf800
jal lcd_dat
addi t6, t6, -1
bgtz t6, red
li t6, 320 * 80
green:
li t0, 0x7e0
jal lcd_dat
addi t6, t6, -1
bgtz t6, green
li t6, 320 * 80
blue:
li t0, 0x1f
jal lcd_dat
addi t6, t6, -1
bgtz t6, blue
1:
j 1b
lcd_wr:
li a0, GPIO_BASE + PD_DAT
li t4, 0x00ff
and t2, t0, t4
li t4, 0xff00
and t3, t0, t4
sll t2, t2, 1
sll t3, t3, 2
move t5, t1
or t5, t5, t2
or t5, t5, t3
sw t5, 0(a0)
li t0, LCD_WR
or t5, t5, t0
sw t5, 0(a0)
jr ra
lcd_dat:
move a1, ra
li t1, LCD_RS | LCD_RD | LCD_BL | LCD_RST
jal lcd_wr
jr a1
lcd_cmd:
move a1, ra
li t1, LCD_RD | LCD_BL | LCD_RST
jal lcd_wr
jr a1
lcd_rst:
move a1, ra
li t0, 0x00000000
li a0, GPIO_BASE + PD_DAT
sw t0, 0(a0)
li t0, _250MS
jal delay
li t0, 0xffffffff
li a0, GPIO_BASE + PD_DAT
sw t0, 0(a0)
li t0, _250MS
jal delay
jr a1
delay:
addi t0, t0, -1
bgtz t0, delay
jr ra
.end
完成
