Hiroshi Yamaguchi
/
m0-PwmOut
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Revision 0:8926d6546415, committed 2011-12-22
- Comitter:
- yamaguch
- Date:
- Thu Dec 22 04:29:40 2011 +0000
- Commit message:
Changed in this revision
| main.cpp | Show annotated file Show diff for this revision Revisions of this file |
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Thu Dec 22 04:29:40 2011 +0000
@@ -0,0 +1,64 @@
+#include "mbed.h"
+
+/**
+ * PwmOut for M0
+ */
+class M0PwmOut {
+public:
+ M0PwmOut(PinName pwm, float period = 0.001) : pwm(pwm), period(period), duty(0) {
+ this->pwm = 0;
+ }
+
+ void write(float duty) {
+ if (duty <= 0.0) {
+ this->duty = 0;
+ pwm = 0;
+ ticker.detach();
+ } else if (duty >= 1.0) {
+ this->duty = 1;
+ pwm = 1;
+ ticker.detach();
+ } else {
+ this->duty = duty;
+ ticker.attach(this, &M0PwmOut::onTicker, period);
+ }
+ }
+
+ float read() {
+ return duty;
+ }
+
+ void operator=(float value) {
+ write(value);
+ }
+
+ operator float() {
+ return read();
+ }
+private:
+ DigitalOut pwm;
+ Ticker ticker;
+ Timeout timeout;
+ float period;
+ float duty;
+
+ void onTicker() {
+ this->pwm = 1;
+ timeout.attach(this, &M0PwmOut::onTimeout, duty * period);
+ }
+
+ void onTimeout() {
+ this->pwm = 0;
+ }
+};
+
+int main () {
+ M0PwmOut leds[] = {LED1, LED2, LED3, LED4};
+
+ for (int i = 0; i < 600; i++) {
+ for (int j = 0; j < 4; j++)
+ leds[j] = ((i + 5 * j) % 31) / 30.0;
+ wait(0.2);
+ }
+ for (int i = 0; i < 4; i++) leds[i] = 0;
+}