Kenji Arai
[Updated on OS6] TimerEvent is no longer existing!! Checked TimerEvent function on os5 latest version. Result is okay on FRDM-K64F but STM32 series are NOT okay e.g. Nucleo-L152RE, -F446RE, -L432KC and so on. This TimerEvent is using SoftSerial library and works well on old os2 but not OS5 latest version STM32 series Mbed board.
Forum discussion.
https://forums.mbed.com/t/how-to-port-software-serial-to-os5-6/12641
https://forums.mbed.com/t/softserial-problem-l432kc/8288
Diff: main.cpp
- Revision:
- 0:0a78edc7ac85
- Child:
- 1:3e3b7ec1f33d
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Tue May 12 01:15:04 2020 +0000
@@ -0,0 +1,67 @@
+/*
+ * Mbed-OS5 & OS-2
+ * Check EventTimer behavior
+ *
+ * Copyright (c) 2020 Kenji Arai / JH1PJL
+ * http://www7b.biglobe.ne.jp/~kenjia/
+ * https://os.mbed.com/users/kenjiArai/
+ * Revised: May 12th, 2020
+ * Revised: May 12th, 2020
+ */
+
+#include "mbed.h"
+
+class FlexTicker: public TimerEvent
+{
+public:
+ void attach(void(*fptr)(void)) { _function = Callback<void()>(fptr);}
+ void detach() { remove();}
+ void setNext(int delay) { insert(event.timestamp + delay);}
+ void prime() { event.timestamp = us_ticker_read();}
+protected:
+ virtual void handler() { _function.call();}
+ unsigned int _delay;
+ Callback<void()> _function;
+};
+
+DigitalOut led(LED1);
+FlexTicker tk;
+
+#define TARGET_TIME 50 // 50us
+
+volatile uint32_t num;
+uint32_t time_data[10];
+
+// call by TimerEvent
+void pulse_out(void)
+{
+ led = 1;
+ num++;
+ time_data[num] = us_ticker_read();
+ if (num < 10) {
+ tk.setNext(TARGET_TIME);
+ }
+ led = 0;
+}
+
+int main()
+{
+ printf("MBED_MAJOR_VERSION = %d, ", MBED_MAJOR_VERSION);
+ printf("MINOR = %d, ", MBED_MINOR_VERSION);
+ printf("PATCH = %d\r\n", MBED_PATCH_VERSION);
+ tk.attach(&pulse_out);
+ while(true) {
+ led = 1;
+ num = 0;
+ time_data[0] = us_ticker_read();
+ tk.prime();
+ led = 0;
+ tk.setNext(TARGET_TIME);
+ thread_sleep_for(500);
+ //wait_ms(500);
+ for (uint32_t i = 0; i < 9; i++) {
+ printf("%d=%4d, ", i, time_data[i+1] - time_data[i]);
+ }
+ printf("No=time[us]\r\n");
+ }
+}