Satoru Yoshida
test interruptIn feature with 555 timer
Dependencies: ClockControl PowerControl mbed
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Frequency_counter
by 
Satoru Yoshida
Test interruptIn function with using LMC555 timer IC
LPC 1768 自身が持つタイマー割り込み機能を使わずに、 あえて外部のタイマー IC 555 からの信号で周期的に割り込みするテスト。
下記の回路例では、555 の output 端子が 約 10 秒周期のうち、0.3 秒間 Low になるはず。 ただし、コンデンサーおよび抵抗の誤差の影響があり、実測値は約７秒周期
C を 47μ から 330 μ に変えると約１分前後で周期的に割り込みがかかります。
なるべく配線が交差しないように部品配置してみた例
History
test interrupt by 555
2014-05-11, by strysd [Sun, 11 May 2014 07:29:02 +0000] rev 8
test interrupt by 555
sync libraries
2013-11-06, by strysd [Wed, 06 Nov 2013 07:38:20 +0000] rev 7
sync libraries
separate defines
2013-08-11, by strysd [Sun, 11 Aug 2013 08:34:00 +0000] rev 6
separate defines
change interrupt mode and wait time
2013-06-04, by strysd [Tue, 04 Jun 2013 06:14:19 +0000] rev 5
change interrupt mode and wait time
define constants
2013-06-03, by strysd [Mon, 03 Jun 2013 15:04:08 +0000] rev 4
define constants
define range of not ready
2013-06-03, by strysd [Mon, 03 Jun 2013 12:36:37 +0000] rev 3
define range of not ready
remove unneeded pulldown
2013-06-01, by strysd [Sat, 01 Jun 2013 07:49:57 +0000] rev 2
remove unneeded pulldown
first commit
2013-06-01, by strysd [Sat, 01 Jun 2013 05:44:10 +0000] rev 1
first commit
Can read pulses on the pin and convert them into frequency count
2013-02-03, by Neel [Sun, 03 Feb 2013 21:06:02 +0000] rev 0
Can read pulses on the pin and convert them into frequency count