Sizhe Lin
/
missile_command_Sizhe_Lin
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Dependencies: 4DGL-uLCD-SE SDFileSystem mbed wave_player
Fork of
missile_command
by 
ECE 2035 TA
Diff: segment_display/segment_driver.s
- Revision:
- 0:532cb55d6136
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/segment_display/segment_driver.s Wed Oct 29 01:21:34 2014 +0000
@@ -0,0 +1,183 @@
+ AREA segment_driver, CODE, READONLY
+;--------------------OVERVIEW------------------------
+; This file contains ARM Assembly language functions to
+; drive a 7-segment LED Display (Kingbright SA03-11HDB).
+; This library uses a switch statement on the input
+; register (R0) to set or clear each corresponding lead
+; of the display. NOTE: The 7 Segments of the LED display
+; must be connected to pins p11 - p17 of the mbed digital
+; I/O. For further help with understanding this file,
+; please refer to files:
+; dig_in.s
+; dig_out.s
+;------------------------------------------------------
+; Import function locations so that C compiler can find it and link
+ IMPORT dig_out_P11
+ IMPORT P11_write
+ IMPORT dig_out_P12
+ IMPORT P12_write
+ IMPORT dig_out_P13
+ IMPORT P13_write
+ IMPORT dig_out_P14
+ IMPORT P14_write
+ IMPORT dig_out_P15
+ IMPORT P15_write
+ IMPORT dig_out_P16
+ IMPORT P16_write
+ IMPORT dig_out_P17
+ IMPORT P17_write
+; Export function location so that C compiler can find it and link
+ EXPORT seg_driver_initialize
+seg_driver_initialize ;CLEAR DISPLAY
+ PUSH {LR}
+ BL dig_out_P11
+ BL dig_out_P12
+ BL dig_out_P13
+ BL dig_out_P14
+ BL dig_out_P15
+ BL dig_out_P16
+ BL dig_out_P17
+ MOV R0,#1
+ BL P11_write
+ BL P12_write
+ BL P13_write
+ BL P14_write
+ BL P15_write
+ BL P16_write
+ BL P17_write
+ POP {LR}
+ BX LR
+
+; Export function location so that C compiler can find it and link
+ EXPORT seg_driver
+seg_driver ;SWITCH STATEMENT
+ PUSH {LR}
+ ADR R2,switchpool
+ LDR PC,[R2,R0,LSL #2]
+ ALIGN
+switchpool
+ DCD case0
+ DCD case1
+ DCD case2
+ DCD case3
+ DCD case4
+ DCD case5
+ DCD case6
+ DCD case7
+ DCD case8
+ DCD case9
+case0
+ MOV R0,#0
+ BL P11_write
+ BL P12_write
+ BL P13_write
+ BL P14_write
+ BL P15_write
+ BL P16_write
+ MOV R0,#1
+ BL P17_write
+ B end
+case1
+ MOV R0,#0
+ BL P12_write
+ BL P13_write
+ MOV R0,#1
+ BL P11_write
+ BL P14_write
+ BL P15_write
+ BL P16_write
+ BL P17_write
+ B end
+case2
+ MOV R0,#0
+ BL P11_write
+ BL P12_write
+ BL P14_write
+ BL P15_write
+ BL P17_write
+ MOV R0,#1
+ BL P13_write
+ BL P16_write
+ B end
+case3
+ MOV R0,#0
+ BL P11_write
+ BL P12_write
+ BL P13_write
+ BL P14_write
+ BL P17_write
+ MOV R0,#1
+ BL P15_write
+ BL P16_write
+ B end
+case4
+ MOV R0,#0
+ BL P12_write
+ BL P13_write
+ BL P16_write
+ BL P17_write
+ MOV R0,#1
+ BL P11_write
+ BL P14_write
+ BL P15_write
+ B end
+case5
+ MOV R0,#0
+ BL P11_write
+ BL P13_write
+ BL P14_write
+ BL P16_write
+ BL P17_write
+ MOV R0,#1
+ BL P12_write
+ BL P15_write
+ B end
+case6
+ MOV R0,#0
+ BL P11_write
+ BL P13_write
+ BL P14_write
+ BL P15_write
+ BL P16_write
+ BL P17_write
+ MOV R0,#1
+ BL P12_write
+ B end
+case7
+ MOV R0,#0
+ BL P11_write
+ BL P12_write
+ BL P13_write
+ MOV R0,#1
+ BL P14_write
+ BL P15_write
+ BL P16_write
+ BL P17_write
+ B end
+case8
+ MOV R0,#0
+ BL P11_write
+ BL P12_write
+ BL P13_write
+ BL P14_write
+ BL P15_write
+ BL P16_write
+ BL P17_write
+ B end
+case9
+ MOV R0,#0
+ BL P11_write
+ BL P12_write
+ BL P13_write
+ BL P16_write
+ BL P17_write
+ MOV R0,#1
+ BL P14_write
+ BL P15_write
+ B end
+end
+ POP {LR}
+ BX LR
+;
+ END
+
\ No newline at end of file