MOTOROLA
45
6.7.4
Pulse width measurement mode (mode 4)
The following program illustrates the use of the timer module for input pulse width mea-
surement. The width is measured in this example for the low active period of the input
pulse on the TIO1 pin and is stored in a table (in multiples of the chip operating clock di-
vided by 2).
org x:$100
; define buffer in X memory internal
pulse_width
ds
$100
; measure up to 256 pulses
org p:$16
; this is timer1 interrupt vector address
movep x:TCR1,x:(r0)+
; store width value in table
nop
; second word of the short interrupt
....
org p:main_body
.....
move #pulse_width,r0
; r0 points to start of table
move #$ff,m0
; modulo 100 to wrap around on end of table
movep #$70000000,x:TCSR1
; enable timer interrupts, mode 4 and set INV
; to measure the low active pulse
bset #26,x:IPR
; enable IPL for timer 1
andi #$cf,mr
; remove interrupt masking in status register
bset #31,x:TCSR1
; timer enable
......
; do other tasks
.....
Summary of Contents for DSP96002
Page 3: ...1 2 DSP96002 USER S MANUAL MOTOROLA ...
Page 38: ...MOTOROLA DSP96002 USER S MANUAL 3 15 Figure 3 4 Modulo Arithmetic Unit Block Diagram ...
Page 39: ...3 16 DSP96002 USER S MANUAL MOTOROLA ...
Page 53: ...4 14 DSP96002 USER S MANUAL MOTOROLA ...
Page 76: ...MOTOROLA DSP96002 USER S MANUAL 5 23 Figure 5 8 Address Modifier Summary ...
Page 86: ...6 10 DSP96002 USER S MANUAL MOTOROLA ...
Page 101: ...MOTOROLA DSP96002 USER S MANUAL 7 15 Figure 7 9 HI Block Diagram One Port ...
Page 140: ...7 54 DSP96002 USER S MANUAL MOTOROLA ...
Page 166: ...9 10 DSP96002 USER S MANUAL MOTOROLA ...
Page 181: ...MOTOROLA DSP96002 USER S MANUAL 10 15 Figure 10 8 Program Address Bus FIFO ...
Page 337: ...MOTOROLA DSP96002 USER S MANUAL A 149 ...
Page 404: ...A 216 DSP96002 USER S MANUAL MOTOROLA PC xxxx D ...
Page 460: ...A 272 DSP96002 USER S MANUAL MOTOROLA SIOP Not affected ...
Page 484: ...A 296 DSP96002 USER S MANUAL MOTOROLA SSH PC SSL SR SP 1 SP ...
Page 519: ...MOTOROLA DSP96002 USER S MANUAL A 331 ...
Page 718: ...MOTOROLA DSP96002 USER S MANUAL B 199 ...
Page 871: ... MOTOROLA INC 1994 MOTOROLA TECHNICAL DATA SEMICONDUCTOR M Addendum ...
Page 888: ...MOTOROLA INDEX 1 INDEX ...
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