Revision 0:48ca2f941140, committed 2019-12-30

Comitter:

Joeatsumi

Date:

Mon Dec 30 09:11:49 2019 +0000

Commit message:

20191230

Changed in this revision

diff -r 000000000000 -r 48ca2f941140 main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon Dec 30 09:11:49 2019 +0000
@@ -0,0 +1,60 @@
+//==================================================
+//Reading PWM pulse
+//
+//MPU board: mbed LPC1768
+//2019/10/13 A.Toda
+//==================================================
+#include "mbed.h"
+
+//Port Setting
+InterruptIn reading_port(p15); 
+Serial pc(USBTX, USBRX);    //UART
+
+//==================================================
+//Timer valiables
+//==================================================
+Timer ch_time;//timer for calculate pulse width
+
+double measured_pre_pulse=0.0;
+double measured_pulse=0.0;
+
+//=================================================
+//Functions for rising and falind edge interrution
+//=================================================
+//rise edge
+void rising_edge(){
+    ch_time.reset();//reset timer counter
+    measured_pre_pulse=ch_time.read();
+    
+}
+
+//falling edge
+void falling_edge(){
+    measured_pre_pulse=(ch_time.read()-measured_pre_pulse);
+    pc.printf("The pulse width=%f\r\n",measured_pre_pulse);
+}
+
+//==================================================
+//Main
+//==================================================
+int main() {
+
+    //UART initialization
+    pc.baud(115200);
+    
+    //Logging starts
+    pc.printf("Reading starts.");
+    
+    //timer starts
+    ch_time.start();
+    
+    //declare interrupitons
+    reading_port.rise(rising_edge);
+    reading_port.fall(falling_edge);
+    
+    //while
+    while(1) {
+        wait(0.01);
+    }//while ends
+    
+}//main ends
\ No newline at end of file

diff -r 000000000000 -r 48ca2f941140 mbed.bld
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Mon Dec 30 09:11:49 2019 +0000
@@ -0,0 +1,1 @@
+https://os.mbed.com/users/mbed_official/code/mbed/builds/3a7713b1edbc
\ No newline at end of file