422 lines
8.3 KiB
NASM
422 lines
8.3 KiB
NASM
.text
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addi sp, zero, 2000 #内存堆栈初始化
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#############################################################
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#走马灯测?,测试addi,andi,slli,srli,srai,or,ori,nor,ecall LED按走马灯方式来回显示数据
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#############################################################
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.text
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START:
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addi s0,zero,1
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slli s3, s0, 31 # s3=0x80000000
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srai s3, s3, 31 # s3=0xFFFFFFFF
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add s0,zero,zero # s0=0
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addi s2,zero,12
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addi s6,zero,8 #走马灯计数
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zmd_loop:
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addi s0, s0, 1 #计算下一个走马灯的数
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andi s0, s0, 15
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#######################################
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addi t0,zero,8
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addi t1,zero,1
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left:
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slli s3, s3, 4 #走马灯左移
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or s3, s3, s0
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add a0,zero,s3 # display s3
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addi a7,zero,34 # system call for LED display
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ecall # display
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sub t0,t0,t1
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bne t0,zero,left
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#######################################
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addi s0, s0, 1 #计算下一个走马灯的数
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addi t6,zero,15
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and s0, s0, t6
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slli s0, s0, 28
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addi t0,zero,8
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addi t1,zero,1
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zmd_right:
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srli s3, s3, 4 #走马灯右移
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or s3, s3, s0
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add a0,zero,s3 # display s3
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addi a7,zero,34 # system call for LED display
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ecall # display
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sub t0,t0,t1
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bne t0,zero,zmd_right
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srli s0, s0, 28
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#######################################
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sub s6,s6,t1
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beq s6,zero, exit
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j zmd_loop
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exit:
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add t0,zero,zero
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xori t0,t0,-1 #test nor ori
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slli t0,t0,16
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ori t0,t0,-1
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add a0,zero,t0 # display t0
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addi a7,zero,34 # system call for LED display
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ecall # display
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j START # loop forever
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#InteruptProgram1:
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#############################################################################################
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# exceptoin 1
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# 使用?s6? s5?s4?s3?s0?a0?a7
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#############################################################################################
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################# 保护现场
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InteruptProgram1:
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sw t0, 0(sp) #保护t0现场
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addi sp, sp, 4
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sw t3, 0(sp) #保护t3现场
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addi sp, sp, 4
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sw s1, 0(sp) #保护s1现场
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addi sp, sp, 4
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sw a7, 0(sp)
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addi sp, sp, 4
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sw a0, 0(sp)
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addi sp, sp, 4
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sw s0, 0(sp)
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addi sp, sp, 4
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sw s3, 0(sp)
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addi sp, sp, 4
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sw s4, 0(sp)
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addi sp, sp, 4
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sw s5, 0(sp)
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addi sp, sp, 4
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sw s6, 0(sp)
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addi sp, sp, 4
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csrrsi s6,0x41,0 #s6=uepc
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sw s6, 0(sp) #uepc压栈保护
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addi sp, sp, 4
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################# 开中断
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csrrsi zero,0x4,1 #ustatus.MIE=1
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################# DIVU测试
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addi t0,zero,2 # /2
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addi s1,zero, 0x11
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slli s1,s1,8
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addi s1,s1,0x11
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slli s1,s1,16
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add a0,zero,s1
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addi a7,zero,34
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ecall
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addi t3,zero,28 #ѭ������
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divu_branch:
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divu s1,s1,t0 #����ָ��
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add a0,zero,s1
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addi a7,zero,34
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ecall #�����ǰֵ
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addi t3,t3, -1
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bne t3,zero,divu_branch #ѭ��
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addi a7,zero,10
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################# 中断服务
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addi s6,zero,1 #中断?1,2,3 不同中断号显示值不一样
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addi s4,zero,3 #循环次数初始值
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addi s5,zero,1 #计数器累加值
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IntLoop1:
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add s0,zero,s6
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IntLeftShift1:
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slli s0, s0, 4
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or s3,s0,s4
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add a0,zero,s3 #display s0
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addi a7,zero,34 # display hex
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ecall
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bne s0, zero, IntLeftShift1
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sub s4,s4,s5 #循环次数递减
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bne s4, zero, IntLoop1
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################# 关中断
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csrrci zero,0x4,1 #ustatus.MIE=0
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################# 恢复现场
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addi sp, sp, -4
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lw s6, 0(sp)
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csrrw zero,0x41,s6 #uepc=s6
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addi sp, sp, -4
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lw s6, 0(sp)
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addi sp, sp, -4
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lw s5, 0(sp)
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addi sp, sp, -4
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lw s4, 0(sp)
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addi sp, sp, -4
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lw s3, 0(sp)
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addi sp, sp, -4
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lw s0, 0(sp)
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addi sp, sp, -4
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lw a0, 0(sp)
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addi sp, sp, -4
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lw a7, 0(sp)
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addi sp, sp, -4
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lw s1, 0(sp) #恢复s1现场
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addi sp, sp, -4
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lw t3, 0(sp) #恢复t3现场
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addi sp, sp, -4
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lw t0, 0(sp) #恢复t0现场
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################ 中断返回
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uret #同步开中断，uepc-->pc
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#InteruptProgram2:
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#############################################################################################
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# exceptoin 2
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# 使用?s6? s5?s4?s3?s0?a0?a7
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#############################################################################################
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################# 保护现场
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InteruptProgram2:
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sw t1, 0(sp) #保护t1现场
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addi sp, sp, 4
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sw t3, 0(sp) #保护t3现场
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addi sp, sp, 4
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sw s1, 0(sp) #保护s1现场
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addi sp, sp, 4
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sw s2, 0(sp) #保护s2现场
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addi sp, sp, 4
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sw a7, 0(sp)
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addi sp, sp, 4
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sw a0, 0(sp)
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addi sp, sp, 4
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sw s0, 0(sp)
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addi sp, sp, 4
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sw s3, 0(sp)
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addi sp, sp, 4
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sw s4, 0(sp)
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addi sp, sp, 4
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sw s5, 0(sp)
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addi sp, sp, 4
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sw s6, 0(sp)
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addi sp, sp, 4
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csrrsi s6,0x41,0 #s6=uepc
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sw s6, 0(sp) #uepc压栈保护
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addi sp, sp, 4
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################# 开中断
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csrrsi zero,0x4,1 #ustatus.MIE=1
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################# BLT测试
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addi s1,zero,-15 #初始值
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blt_branch:
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add a0,zero,s1
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addi a7,zero,34
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ecall #输出当前值
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addi s1,s1,1
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blt s1,zero,blt_branch #当前指令
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addi a7,zero,10
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################# 中断服务
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addi s6,zero,2 #中断?1,2,3 不同中断号显示值不一样
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addi s4,zero,3 #循环次数初始值
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addi s5,zero,1 #计数器累加值
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IntLoop2:
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add s0,zero,s6
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IntLeftShift2:
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slli s0, s0, 4
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or s3,s0,s4
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add a0,zero,s3 #display s0
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addi a7,zero,34 # display hex
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ecall
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bne s0, zero, IntLeftShift2
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sub s4,s4,s5 #循环次数递减
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bne s4, zero, IntLoop2
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################# 关中断
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csrrci zero,0x4,1 #ustatus.MIE=0
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################# 恢复现场
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addi sp, sp, -4
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lw s6, 0(sp)
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csrrw zero,0x41,s6 #uepc=s6
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addi sp, sp, -4
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lw s6, 0(sp)
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addi sp, sp, -4
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lw s5, 0(sp)
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addi sp, sp, -4
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lw s4, 0(sp)
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addi sp, sp, -4
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lw s3, 0(sp)
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addi sp, sp, -4
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lw s0, 0(sp) #恢复s0现场
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addi sp, sp, -4
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lw a0, 0(sp)
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addi sp, sp, -4
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lw a7, 0(sp)
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addi sp, sp, -4
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lw s2, 0(sp) #恢复s2现场
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addi sp, sp, -4
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lw s1, 0(sp) #恢复s1现场
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addi sp, sp, -4
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lw t3, 0(sp) #恢复t3现场
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addi sp, sp, -4
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lw t1, 0(sp) #恢复t1现场
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################ 中断返回
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uret #同步开中断，uepc-->pc
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#InteruptProgram3:
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#############################################################################################
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# exceptoin 3
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# 使用?s6? s5?s4?s3?s0?a0?a7
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#############################################################################################
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################# 保护现场
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InteruptProgram3:
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sw s1, 0(sp) #保护s1现场
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addi sp, sp, 4
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sw a7, 0(sp)
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addi sp, sp, 4
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sw a0, 0(sp)
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addi sp, sp, 4
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sw s0, 0(sp)
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addi sp, sp, 4
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sw s3, 0(sp)
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addi sp, sp, 4
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sw s4, 0(sp)
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addi sp, sp, 4
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sw s5, 0(sp)
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addi sp, sp, 4
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sw s6, 0(sp)
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addi sp, sp, 4
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csrrsi s6,0x41,0 #s6=uepc
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sw s6, 0(sp) #uepc压栈保护
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addi sp, sp, 4
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################# 开中断
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csrrsi zero,0x4,1 #ustatus.MIE=1
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################# SB测试
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addi t1,zero,0 #init_addr
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addi t3,zero,32 #counter
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#sb写入 01,02,03,04
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addi s1,zero, 0x00 #
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addi s2,zero, 0x01 #
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sb_store:
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sb s1,(t1)
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add a0,zero,s1
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addi a7,zero,34 # system call for print
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ecall # print
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add s1,s1,s2 #data +1
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addi t1,t1,1 # addr ++
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addi t3,t3,-1 #counter
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bne t3,zero,sb_store
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addi t3,zero,8
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addi t1,zero,0 # addr
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sb_branch:
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lw s1,(t1) #读出数据
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add a0,zero,s1
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addi a7,zero,34 # system call for print
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ecall # print
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addi t1,t1,4
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addi t3,t3, -1
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bne t3,zero,sb_branch
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addi a7,zero,10 # system call for exit
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################# 中断服务
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addi s6,zero,3 #中断?1,2,3 不同中断号显示值不一样
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addi s4,zero,3 #循环次数初始值
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addi s5,zero,1 #计数器累加值
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IntLoop3:
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add s0,zero,s6
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IntLeftShift3:
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slli s0, s0, 4
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or s3,s0,s4
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add a0,zero,s3 #display s0
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addi a7,zero,34 # display hex
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ecall
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bne s0, zero, IntLeftShift3
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sub s4,s4,s5 #循环次数递减
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bne s4, zero, IntLoop3
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################# 关中断
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csrrci zero,0x4,1 #ustatus.MIE=0
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################# 恢复现场
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addi sp, sp, -4
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lw s6, 0(sp)
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csrrw zero,0x41,s6 #uepc=s6
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addi sp, sp, -4
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lw s6, 0(sp)
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addi sp, sp, -4
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lw s5, 0(sp)
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addi sp, sp, -4
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lw s4, 0(sp)
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addi sp, sp, -4
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lw s3, 0(sp)
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addi sp, sp, -4
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lw s0, 0(sp)
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addi sp, sp, -4
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lw a0, 0(sp)
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addi sp, sp, -4
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lw a7, 0(sp)
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addi sp, sp, -4
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lw s1, 0(sp) #恢复s1现场
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################ 中断返回
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uret #同步开中断，uepc-->pc
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