Display given number
This commit is contained in:
unlockable
139
20display_num.asm
Normal file
139
20display_num.asm
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@@ -0,0 +1,139 @@
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.text
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#initialize $sp
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lui $sp, 0x4000
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addi $sp, $sp, 0x7ff
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# load digit to mem
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lui $s0, 0x4000
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addi $s0, $s0, 0x20
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#0
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addi $s1, $zero, 0x3f
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sw $s1, 0($s0)
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#1
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addi $s1, $zero, 0x6
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sw $s1, 4($s0)
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#2
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addi $s1, $zero, 0x5b
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sw $s1, 8($s0)
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#3
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addi $s1, $zero, 0x4f
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sw $s1, 12($s0)
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#4
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addi $s1, $zero, 0x66
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sw $s1, 16($s0)
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#5
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addi $s1, $zero, 0x6d
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sw $s1, 20($s0)
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#6
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addi $s1, $zero, 0x7d
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sw $s1, 24($s0)
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#7
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addi $s1, $zero, 0x7
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sw $s1, 28($s0)
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#8
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addi $s1, $zero, 0x7f
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sw $s1, 32($s0)
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#9
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addi $s1, $zero, 0x6f
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sw $s1, 36($s0)
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#A
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addi $s1, $zero, 0x77
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sw $s1, 40($s0)
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#B
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addi $s1, $zero, 0x7c
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sw $s1, 44($s0)
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#C
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addi $s1, $zero, 0x58
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sw $s1, 48($s0)
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#D
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addi $s1, $zero, 0x5e
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sw $s1, 52($s0)
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#E
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addi $s1, $zero, 0x79
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sw $s1, 56($s0)
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#F
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addi $s1, $zero, 0x71
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sw $s1, 60($s0)
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lui $s1, 0x4000
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addi $s1, $s1, 0x10
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addi $s0, $zero, 0xa80
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main_loop:
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addi $s0, $s0, 1
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addi $a0, $s0, 0
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addi $a1, $s1, 0
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jal display_number
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j main_loop
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# a0 is the number to be displayed, a1 is the bcd control addr
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display_number:
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addi $sp, $sp, -32
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sw $ra, 4($sp)
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sw $s0, 8($sp)
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sw $s1, 12($sp)
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sw $s2, 16($sp)
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sw $s3, 20($sp)
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sw $s4, 24($sp)
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sw $s5, 28($sp)
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sw $s6, 32($sp)
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# s0 is the number to be displayed
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addi $s0, $a0, 0
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# s1 is the bcd_control addr
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addi $s1, $a1, 0
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# s2 is the base addr for display digit
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lui $s2, 0x4000
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addi $s2, $s2, 0x20
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# s3 is the counter for a complete scan of 4 digit
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addi $s3, $zero, 0x2ed4
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all_digit_scan_loop:
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# s4 is the num being shifted gradually
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addi $s4, $s0, 0
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# s6 is the enable digit
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addi $s6, $zero, 0x100
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addi $s5, $zero, 4
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single_digit_loop:
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# get a digit
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andi $t0, $s4, 0xf
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# digit * 4 is the memory shift
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sll $t0, $t0, 2
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add $t0, $s2, $t0
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lw $t0, 0($t0)
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or $t0, $t0, $s6
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sw $t0, 0($s1)
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srl $s4, $s4, 4
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sll $s6, $s6, 1
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# jal wait_for_digit_time
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addi $t0, $zero, 0x00ff
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wait_time_loop:
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addi $t0, $t0, -1
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bgtz $t0, wait_time_loop
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addi $s5, $s5, -1
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bgtz $s5, single_digit_loop
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# end of single digit loop
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# ** depends on the clock **
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# four digit, 83.42us.
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# 1s / 83.42us = 11988 = (2ed4)hex
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addi $s3, $s3, -1
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bgtz $s3, all_digit_scan_loop
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lw $ra, 4($sp)
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lw $s0, 8($sp)
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lw $s1, 12($sp)
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lw $s2, 16($sp)
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lw $s3, 20($sp)
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lw $s4, 24($sp)
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lw $s5, 28($sp)
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lw $s6, 32($sp)
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addi $sp, $sp, 32
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jr $ra
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86
20display_num.txt
Normal file
86
20display_num.txt
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@@ -0,0 +1,86 @@
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20'd0: instruction <= 32'h3c1d4000;
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20'd1: instruction <= 32'h23bd07ff;
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20'd2: instruction <= 32'h3c104000;
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20'd3: instruction <= 32'h22100020;
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20'd4: instruction <= 32'h2011003f;
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20'd5: instruction <= 32'hae110000;
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20'd6: instruction <= 32'h20110006;
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20'd7: instruction <= 32'hae110004;
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20'd8: instruction <= 32'h2011005b;
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20'd9: instruction <= 32'hae110008;
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20'd10: instruction <= 32'h2011004f;
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20'd11: instruction <= 32'hae11000c;
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20'd12: instruction <= 32'h20110066;
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20'd13: instruction <= 32'hae110010;
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20'd14: instruction <= 32'h2011006d;
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20'd15: instruction <= 32'hae110014;
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20'd16: instruction <= 32'h2011007d;
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20'd17: instruction <= 32'hae110018;
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20'd18: instruction <= 32'h20110007;
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20'd19: instruction <= 32'hae11001c;
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20'd20: instruction <= 32'h2011007f;
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20'd21: instruction <= 32'hae110020;
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20'd22: instruction <= 32'h2011006f;
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20'd23: instruction <= 32'hae110024;
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20'd24: instruction <= 32'h20110077;
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20'd25: instruction <= 32'hae110028;
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20'd26: instruction <= 32'h2011007c;
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20'd27: instruction <= 32'hae11002c;
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20'd28: instruction <= 32'h20110058;
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20'd29: instruction <= 32'hae110030;
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20'd30: instruction <= 32'h2011005e;
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20'd31: instruction <= 32'hae110034;
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20'd32: instruction <= 32'h20110079;
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20'd33: instruction <= 32'hae110038;
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20'd34: instruction <= 32'h20110071;
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20'd35: instruction <= 32'hae11003c;
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20'd36: instruction <= 32'h3c114000;
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20'd37: instruction <= 32'h22310010;
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20'd38: instruction <= 32'h20100a80;
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20'd39: instruction <= 32'h22100001;
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20'd40: instruction <= 32'h22040000;
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20'd41: instruction <= 32'h22250000;
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20'd42: instruction <= 32'h0c00002c;
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20'd43: instruction <= 32'h08000027;
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20'd44: instruction <= 32'h23bdffe0;
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20'd45: instruction <= 32'hafbf0004;
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20'd46: instruction <= 32'hafb00008;
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20'd47: instruction <= 32'hafb1000c;
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20'd48: instruction <= 32'hafb20010;
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20'd49: instruction <= 32'hafb30014;
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20'd50: instruction <= 32'hafb40018;
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20'd51: instruction <= 32'hafb5001c;
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20'd52: instruction <= 32'hafb60020;
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20'd53: instruction <= 32'h20900000;
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20'd54: instruction <= 32'h20b10000;
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20'd55: instruction <= 32'h3c124000;
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20'd56: instruction <= 32'h22520020;
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20'd57: instruction <= 32'h20132ed4;
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20'd58: instruction <= 32'h22140000;
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20'd59: instruction <= 32'h20160100;
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20'd60: instruction <= 32'h20150004;
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20'd61: instruction <= 32'h3288000f;
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20'd62: instruction <= 32'h00084080;
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20'd63: instruction <= 32'h02484020;
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20'd64: instruction <= 32'h8d080000;
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20'd65: instruction <= 32'h01164025;
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20'd66: instruction <= 32'hae280000;
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20'd67: instruction <= 32'h0014a102;
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20'd68: instruction <= 32'h0016b040;
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20'd69: instruction <= 32'h200800ff;
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20'd70: instruction <= 32'h2108ffff;
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20'd71: instruction <= 32'h1d00fffe;
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20'd72: instruction <= 32'h22b5ffff;
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20'd73: instruction <= 32'h1ea0fff3;
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20'd74: instruction <= 32'h2273ffff;
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20'd75: instruction <= 32'h1e60ffee;
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20'd76: instruction <= 32'h8fbf0004;
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20'd77: instruction <= 32'h8fb00008;
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20'd78: instruction <= 32'h8fb1000c;
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20'd79: instruction <= 32'h8fb20010;
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20'd80: instruction <= 32'h8fb30014;
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20'd81: instruction <= 32'h8fb40018;
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20'd82: instruction <= 32'h8fb5001c;
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20'd83: instruction <= 32'h8fb60020;
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20'd84: instruction <= 32'h23bd0020;
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20'd85: instruction <= 32'h03e00008;
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86
20display_num_mars.txt
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86
20display_num_mars.txt
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@@ -0,0 +1,86 @@
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3c1d4000
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23bd07ff
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3c104000
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22100020
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2011003f
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ae110000
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20110006
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ae110004
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2011005b
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ae110008
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2011004f
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ae11000c
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20110066
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ae110010
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2011006d
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ae110014
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2011007d
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ae110018
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20110007
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ae11001c
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2011007f
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ae110020
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2011006f
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ae110024
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20110077
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ae110028
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2011007c
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ae11002c
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20110058
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ae110030
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2011005e
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ae110034
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20110079
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ae110038
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20110071
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ae11003c
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3c114000
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22310010
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20100a80
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22100001
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22040000
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22250000
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0c00002c
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08000027
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23bdffe0
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afbf0004
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afb00008
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afb1000c
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afb20010
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afb30014
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afb40018
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afb5001c
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afb60020
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20900000
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20b10000
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3c124000
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22520020
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20132ed4
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22140000
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20160100
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20150004
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3288000f
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00084080
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02484020
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8d080000
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01164025
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ae280000
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0014a102
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0016b040
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200800ff
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2108ffff
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1d00fffe
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22b5ffff
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1ea0fff3
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2273ffff
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1e60ffee
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8fbf0004
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8fb00008
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8fb1000c
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8fb20010
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8fb30014
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8fb40018
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8fb5001c
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8fb60020
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23bd0020
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03e00008
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