SLAS191A Datasheet, PDF (33/86 Pages) Texas Instruments – Starter Kit Evaluation Kit Manual

;****************************************************************************
; Section in EPROM
;****************************************************************************
.sect “PrepLCD”, EPROM_orig
;––– Prepare LCD and Basic timer
PrepLCD MOV.B
#–1h,LCDM
;LCD : Analog generator on Low
;
impedance 4 Mux active
;
all outputs are Seg
MOV.B
#057h,BTCTL
; Basic Timer : SSEL=0 DIV=0 Reset=1
; ACLK
; 32768/256 = 128 Hz
; (7.8 ms debounce time)
; LCD frame frequency @ 4 Mux: 64 Hz
BIS.B
#BTME,ME2
; Enable basic timer module
BIC.B
#040h,BTCTL
; Basic Timer reset disabled
BIS.B
#BTIE,IE2
; enable basic timer interrupt
MOV.B
#lcd_ival,lcd_timer ; load SW lcd timer
CALL
#show_cir
; clear LCD
EINT
; enable interrupts
;––– clear LCD
.sect “show_clr:”,EPROM_orig+50h
show_clr
MOV
#15, r5
; clear display memory
show_clrl
MOV.b
#0, LCD1–1(r5)
DEC
r5
JNz
show_clr1
RET
;****************************************************************************
; Basic Timer Interrupt routine
;****************************************************************************
.sect
“Int_BT” ,EPROM_orig+100h
Int_BT
; Basic Timer 128 Hz (7.8 ms)
DEC.B
lcd_timer
; decrement SW lcd-timer
JNZ
Int_BT_end
; !0 : no action
BIC
#CPUOFF,0 (SP)
; Clear CPUoff Bit
MOV.B
#lcd_ival,lcd_timer ; =0 : load again
Int_BT_end
RETI
Figure 1–23. EPROM LCD and Interrupt Routine
Now these routines can be used in any other program. This section does not have to be downloaded again,
even if the STK/EVK is disconnected from the power supply.
To load a program using the HyperTerminal, double click the terminal icon in the MSP-STK/EVK430 program
group in the Windows Program Manager. The HyperTerminal window appears as follows in Figure 1–24.
1–27