Simon Ford
/
PWMTest
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Diff: main.cpp
- Revision:
- 0:c795e64e9eb0
- Child:
- 1:4115ae4cbc76
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Tue Dec 01 11:01:48 2009 +0000
@@ -0,0 +1,34 @@
+// Testing PWM channel 0 vs channel 1 behaviour, sford
+
+#include "mbed.h"
+
+PwmOut pwm1(p26);
+PwmOut pwm2(p25);
+
+int main() {
+
+ uint32_t t = 10000;
+
+ // set period
+ LPC_PWM1->MR0 = t;
+ LPC_PWM1->LER |= 1 << 0;
+
+ while (1) {
+
+ // set pulsewidth to 100%
+ LPC_PWM1->MR1 = t;
+ LPC_PWM1->MR2 = t;
+ LPC_PWM1->LER |= 0x6;
+
+ // wait for update
+ while (LPC_PWM1->LER);
+
+ // set pulsewidth less than 100%
+ LPC_PWM1->MR1 = t - 500;
+ LPC_PWM1->MR2 = t - 500;
+ LPC_PWM1->LER |= 0x6;
+
+ // wait for update
+ while (LPC_PWM1->LER);
+ }
+}