stm32纯汇编LCD显示

只看该作者 · 2015-5-24 13:15

板子是正点原子的miniSTM32开发板，读液晶返回的ID是4535（程序中没用读液晶代码）。

程序实现时钟初始化、IO设置、LCD初始化、LCD画背景色、LCD显示字符几个部分。

红底蓝子大概在中间位置显示：
STM32ASM
YJMWXWX
2015-05-21
程序不大，搞了两天才弄出来。程序代码极其不规范，没有利用堆栈传送数据等
工具链 gcc-arm-none-eabi

   .thumb
      .syntax unified

.section .data
lcdcsh:
.short 0x0000,0x0001,0x0015,0x0030,0x009a,0x0010,0x0011,0x0020,0x0010,0x3428,0x0012,0x0002,0x0013,0x1038,0x0012,0x0012,0x0010,0x3420,0x0013,0x3038,0x0030,0x0000,0x0031,0x0402,0x0032,0x0307,0x0033,0x0304,0x0034,0x0004,0x0035,0x0401,0x0036,0x0707,0x0037,0x0305,0x0038,0x0610,0x0039,0x0610,0x0001,0x0100,0x0002,0x0300,0x0003,0x1030,0x0008,0x0808,0x000a,0x0008,0x0060,0x2700,0x0061,0x00001,0x0090,0x13e,0x0092,0x0100,0x0093,0x0100,0x00a0,0x3000,0x00a3,0x0010,0x0007,0x0001,0x0007,0x0021,0x0007,0x0023,0x0007,0x0033,0x0007,0x0133

shijian: .ascii "2015-05-21"
AYJMWXWX:  .ascii "YJMWXWX"
ASTM32ASM: .ascii "STM32ASM"

lcdmabiao:
.byte 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x00,0x00,0x18,0x18,0x00,0x00,0x00,0x48,0x6C,0x24,0x12,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x24,0x24,0x24,0x7F,0x12,0x12,0x12,0x7F,0x12,0x12,0x12,0x00,0x00,0x00,0x00,0x08,0x1C,0x2A,0x2A,0x0A,0x0C,0x18,0x28,0x28,0x2A,0x2A,0x1C,0x08,0x08,0x00,0x00,0x00,0x22,0x25,0x15,0x15,0x15,0x2A,0x58,0x54,0x54,0x54,0x22,0x00,0x00,0x00,0x00,0x00,0x0C,0x12,0x12,0x12,0x0A,0x76,0x25,0x29,0x11,0x91,0x6E,0x00,0x00,0x00,0x06,0x06,0x04,0x03,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x40,0x20,0x10,0x10,0x08,0x08,0x08,0x08,0x08,0x08,0x10,0x10,0x20,0x40,0x00,0x00,0x02,0x04,0x08,0x08,0x10,0x10,0x10,0x10,0x10,0x10,0x08,0x08,0x04,0x02,0x00,0x00,0x00,0x00,0x00,0x08,0x08,0x6B,0x1C,0x1C,0x6B,0x08,0x08,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x08,0x08,0x08,0x08,0x7F,0x08,0x08,0x08,0x08,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x06,0x06,0x04,0x03,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFE,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x06,0x06,0x00,0x00,0x00,0x00,0x80,0x40,0x40,0x20,0x20,0x10,0x10,0x08,0x08,0x04,0x04,0x02,0x02,0x00,0x00,0x00,0x00,0x18,0x24,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x24,0x18,0x00,0x00,0x00,0x00,0x00,0x08,0x0E,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x3E,0x00,0x00,0x00,0x00,0x00,0x3C,0x42,0x42,0x42,0x20,0x20,0x10,0x08,0x04,0x42,0x7E,0x00,0x00,0x00,0x00,0x00,0x3C,0x42,0x42,0x20,0x18,0x20,0x40,0x40,0x42,0x22,0x1C,0x00,0x00,0x00,0x00,0x00,0x20,0x30,0x28,0x24,0x24,0x22,0x22,0x7E,0x20,0x20,0x78,0x00,0x00,0x00,0x00,0x00,0x7E,0x02,0x02,0x02,0x1A,0x26,0x40,0x40,0x42,0x22,0x1C,0x00,0x00,0x00,0x00,0x00,0x38,0x24,0x02,0x02,0x1A,0x26,0x42,0x42,0x42,0x24,0x18,0x00,0x00,0x00,0x00,0x00,0x7E,0x22,0x22,0x10,0x10,0x08,0x08,0x08,0x08,0x08,0x08,0x00,0x00,0x00,0x00,0x00,0x3C,0x42,0x42,0x42,0x24,0x18,0x24,0x42,0x42,0x42,0x3C,0x00,0x00,0x00,0x00,0x00,0x18,0x24,0x42,0x42,0x42,0x64,0x58,0x40,0x40,0x24,0x1C,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x18,0x18,0x00,0x00,0x00,0x00,0x18,0x18,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x08,0x00,0x00,0x00,0x00,0x00,0x08,0x08,0x04,0x00,0x00,0x00,0x40,0x20,0x10,0x08,0x04,0x02,0x04,0x08,0x10,0x20,0x40,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7F,0x00,0x00,0x00,0x7F,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x02,0x04,0x08,0x10,0x20,0x40,0x20,0x10,0x08,0x04,0x02,0x00,0x00,0x00,0x00,0x00,0x3C,0x42,0x42,0x46,0x40,0x20,0x10,0x10,0x00,0x18,0x18,0x00,0x00,0x00,0x00,0x00,0x1C,0x22,0x5A,0x55,0x55,0x55,0x55,0x2D,0x42,0x22,0x1C,0x00,0x00,0x00,0x00,0x00,0x08,0x08,0x18,0x14,0x14,0x24,0x3C,0x22,0x42,0x42,0xE7,0x00,0x00,0x00,0x00,0x00,0x1F,0x22,0x22,0x22,0x1E,0x22,0x42,0x42,0x42,0x22,0x1F,0x00,0x00,0x00,0x00,0x00,0x7C,0x42,0x42,0x01,0x01,0x01,0x01,0x01,0x42,0x22,0x1C,0x00,0x00,0x00,0x00,0x00,0x1F,0x22,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x22,0x1F,0x00,0x00,0x00,0x00,0x00,0x3F,0x42,0x12,0x12,0x1E,0x12,0x12,0x02,0x42,0x42,0x3F,0x00,0x00,0x00,0x00,0x00,0x3F,0x42,0x12,0x12,0x1E,0x12,0x12,0x02,0x02,0x02,0x07,0x00,0x00,0x00,0x00,0x00,0x3C,0x22,0x22,0x01,0x01,0x01,0x71,0x21,0x22,0x22,0x1C,0x00,0x00,0x00,0x00,0x00,0xE7,0x42,0x42,0x42,0x42,0x7E,0x42,0x42,0x42,0x42,0xE7,0x00,0x00,0x00,0x00,0x00,0x3E,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x3E,0x00,0x00,0x00,0x00,0x00,0x7C,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x11,0x0F,0x00,0x00,0x00,0x77,0x22,0x12,0x0A,0x0E,0x0A,0x12,0x12,0x22,0x22,0x77,0x00,0x00,0x00,0x00,0x00,0x07,0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x42,0x7F,0x00,0x00,0x00,0x00,0x00,0x77,0x36,0x36,0x36,0x36,0x2A,0x2A,0x2A,0x2A,0x2A,0x6B,0x00,0x00,0x00,0x00,0x00,0xE3,0x46,0x46,0x4A,0x4A,0x52,0x52,0x52,0x62,0x62,0x47,0x00,0x00,0x00,0x00,0x00,0x1C,0x22,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x22,0x1C,0x00,0x00,0x00,0x00,0x00,0x3F,0x42,0x42,0x42,0x42,0x3E,0x02,0x02,0x02,0x02,0x07,0x00,0x00,0x00,0x00,0x00,0x1C,0x22,0x41,0x41,0x41,0x41,0x41,0x4D,0x53,0x32,0x1C,0x60,0x00,0x00,0x00,0x00,0x3F,0x42,0x42,0x42,0x3E,0x12,0x12,0x22,0x22,0x42,0xC7,0x00,0x00,0x00,0x00,0x00,0x7C,0x42,0x42,0x02,0x04,0x18,0x20,0x40,0x42,0x42,0x3E,0x00,0x00,0x00,0x00,0x00,0x7F,0x49,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x1C,0x00,0x00,0x00,0x00,0x00,0xE7,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x3C,0x00,0x00,0x00,0x00,0x00,0xE7,0x42,0x42,0x22,0x24,0x24,0x14,0x14,0x18,0x08,0x08,0x00,0x00,0x00,0x00,0x00,0x6B,0x49,0x49,0x49,0x49,0x55,0x55,0x36,0x22,0x22,0x22,0x00,0x00,0x00,0x00,0x00,0xE7,0x42,0x24,0x24,0x18,0x18,0x18,0x24,0x24,0x42,0xE7,0x00,0x00,0x00,0x00,0x00,0x77,0x22,0x22,0x14,0x14,0x08,0x08,0x08,0x08,0x08,0x1C,0x00,0x00,0x00,0x00,0x00,0x7E,0x21,0x20,0x10,0x10,0x08,0x04,0x04,0x42,0x42,0x3F,0x00,0x00

      .equ STACKINIT,    0x20005000
.equ lcdyanshia,    40000

.section .text
vectors:
      .word STACKINIT
      .word _start + 1
      .word _nmi_handler + 1
      .word _hard_fault  + 1
      .word _memory_fault + 1
      .word _bus_fault + 1
      .word _usage_fault + 1
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0
.word _dingshiqi + 1

_start:

@@AFIO-MAPR 开SWD模式
ldr r0, = 0x40010004
ldr r1, = 0x02000000
str r1, [r0]
shizhong:
ldr r0, = 0x40021000
ldr r1, = 0x14D83
str r1, [r0]
gsszbz:
ldr r2, [r0]
ldr r1, = 0x20000
tst r1, r2          @高速时钟标志位
bne rccchushihua
b gsszbz
rccchushihua:
ldr r0, = 0x40022000
mov r1, # 0x00000032
str r1, [r0]          @FLASH缓冲缓冲开启
ldr r0, = 0x40021004
ldr r1, = 0x1D8400
str r1, [r0]
ldr r0, = 0x40021000
ldr r1, = 0x1033D03
str r1, [r0]
chaxun:
ldr r2, [r0]
ldr r1, = 0x2000000
tst r1, r2
bne rccgg
b chaxun
rccgg:
ldr r0, = 0x40021004
ldr r1, = 0x1D8402
str r1, [r0]
ioshezhi:

   ldr r6, = 0x40021018
      mov r0, 0x39
      str r0, [r6]
@@AFIO-MAPR 开SWD
ldr r0, = 0x40010004
ldr r1, = 0x02000000
str r1, [r0]
ldr r0, = 0x40011000
ldr r1, = 0x33444444
str r1, [r0]
ldr r1, = 0x44444333
str r1, [r0, # 4]
ldr r1, = 0x7c0
str r1, [r0, # 0xc]
ldr r0, = 0x40010C00
ldr r1, = 0x33333333
str r1, [r0]
ldr r1, = 0x33333333
str r1, [r0, # 4]
ldr r1, = 0xffff
str r1, [r0, # 0xc]
ldr r5, = lcdyanshia
mov r6, # 0
mov r2, # 0
lcdchushihua:
add r6, # 1
ldr r0, = lcdcsh
ldrh r4, [r0, r2]
add r2, # 2
ldrh r7, [r0, r2]
add r2, # 2
cmp r6, # 1
beq yanshi1
cmp r6, # 7
beq yanshi1
cmp r6, # 8
beq yanshi1
cmp r6, # 10
beq yanshi1
bl lcdchushihua2

lcd1:
cmp r2, # 0x94
bhi tiaochu
b lcdchushihua

yanshi1:
bl lcdchushihua2
bl yanshi
b lcd1
tiaochu:
mov r2, # 0
mov r8, # 0
mov r9, # 0
ldr r10, = 0xf800
xxxxxx:
mov r4, # 0x20
mov r7, r8
bl lcdchushihua2
add r8, # 1
cmp r8, # 240
bne yyyyyy
mov r8, # 0
b tiaochuyanse
yyyyyy:
mov r4, # 0x21
mov r7, r9
bl lcdchushihua2
add r9, # 1
cmp.w r9, # 320
bne xielcd
mov r9, # 0
b xxxxxx
xielcd:
mov r4, # 0x22
mov r7, r10
bl lcdchushihua2
b yyyyyy

lcdchushihua2:
push {r0,r1,r3,r7,lr}
ldr r0, = 0x4001100c
mov r1, # 0x4c0
str r1, [r0]
ldr r3, = 0x40010c0c
str r4, [r3]
mov r1, # 0x440
str r1, [r0]
mov r1, # 0x7c0
str r1, [r0]
mov r1, # 0x5c0
str r1, [r0]
str r7, [r3]
mov r1, # 0x540
str r1, [r0]
mov r1, # 0x7c0
str r1, [r0]
pop {r0,r1,r3,r7,pc}

lcdxiedongxi:
push {r0-r12, lr}
mov r3, # 0
mov r8, # 0
mov r9, # 0
qulcdma:
ldr r11, = lcdmabiao
      ldrb r1, [r0, r3]
add r3, # 1
sub r4, r1, # 32
mov r7, # 16
mul r4, r4, r7
add r11, r4
ldr r1, = 0x20000200
ldr r1, [r1]
cmp r3, r1
bne xiezi
mov r3, # 0
pop {r0-r12, pc}

xiezi:
ldrb r6, [r11, r8]
mov r4, # 0x21
add r7, r8, r2
bl lcdchushihua2
add r8, # 1
cmp r8, # 16
bne  xiezi1
mov r8, # 0
add r12, # 8
cmp r12, # 240
bls qulcdma
mov r12, # 0
add r2, # 32
cmp r2, # 320
bls qulcdma
mov r2, # 0
b qulcdma

xiezi1:
mov r4, # 0x20
add r7, r9, r12
bl lcdchushihua2
add r9, # 1
cmp r9, # 8
bne lcdyu
mov r9, # 0
b xiezi
lcdyu:
tst r6, # 0x01
bne lcdxiezi
lcdxiezi1:
mov r4, # 0x22
movw r7, # 0xf800
bl lcdchushihua2
ror r6, # 1
b xiezi1
lcdxiezi:
mov r4, # 0x22
mov r7, # 0x1f
bl lcdchushihua2
ror r6, # 1
b xiezi1
yanshi:
subs r5, # 1
bne yanshi
ldr r5, = lcdyanshia
bx lr

tiaochuyanse:
ldr r0, = 0x20000200  @ 显示位数
mov r1, # 9
str r1, [r0]
mov r2, # 64          @ 列偏移
mov r12, # 32       @ 行偏移
ldr r0, = ASTM32ASM @ 显示的东西
bl lcdxiedongxi
ldr r0, = 0x20000200
mov r1, # 8
str r1, [r0]
mov r2, # 80
mov r12, # 32
ldr r0, = AYJMWXWX
bl lcdxiedongxi
ldr r0, = 0x20000200
mov r1, # 11
str r1, [r0]
mov r2, # 96
mov r12, # 32
ldr r0, = shijian
bl lcdxiedongxi
xiewandongxi:
b xiewandongxi

_nmi_handler:
bx lr
_hard_fault:
bx lr
_memory_fault:
bx lr
_bus_fault:
bx lr
_usage_fault:
bx lr
_dingshiqi:
bx lr

stm32asm_lcd.zip (13.82 KB)