Diff: freq_counter.h

Revision:

4:9a726b997366

Parent:

3:61bea8bfe404

diff -r 61bea8bfe404 -r 9a726b997366 freq_counter.h
--- a/freq_counter.h	Wed Oct 22 00:35:23 2014 +0000
+++ b/freq_counter.h	Tue Aug 04 03:59:07 2020 +0000
@@ -2,17 +2,12 @@
  * mbed Library program
  *      Frequency Counter Hardware relataed program
  *
- * Copyright (c) 2014 Kenji Arai / JH1PJL
- *  http://www.page.sannet.ne.jp/kenjia/index.html
- *  http://mbed.org/users/kenjiArai/
- *      Created: October   18th, 2014
- *      Revised: October   22nd, 2014
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
- * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
- * AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
- * DAMAGES OR OTHER  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * Copyright (c) 2014,'20 Kenji Arai / JH1PJL
+ *  http://www7b.biglobe.ne.jp/~kenjia/
+ *  https://os.mbed.com/users/kenjiArai/
+ *      Additional functions and modification
+ *      started: October   18th, 2014
+ *      Revised: August     4th, 2020
  */
 
 #ifndef        MBED_F_COUNTER
@@ -26,21 +21,21 @@
  *           No way to change pin asｓign and timer module,
  *      mbed LPC1768  -> p30,
  *      mbed LPC1114FN28 -> dp14,
- *      Nucleo F401RE & Nucleo F411RE -> PA_0/A0
+ *      Nucleo F401RE,F411RE & F446RE -> PA_0/A0
  *
  * @code
  * #include "mbed.h"
  * #include "freq_counter.h"
  *
- * F_COUNTER fc(p30);       // for LPC1768
+ * //F_COUNTER fc(p30);     // for LPC1768
  * //F_COUNTER fc(dp14);    // for LPC1114
- * //F_COUNTER fc(PA_0);    // for F401 & F411
+ * F_COUNTER fc(PA_0);    // for F401,F411,F446
  *
  * int main() {
  *   uint32_t frequency = 0;
  *
  *   while(true) {
- *      freqency = fc.read_frequency(1.0);  // gate time: 1 sec
+ *      freqency = fc.read_frequency(1000000);  // gate time: 1 sec
  *      printf("%d [Hz]", frequency);
  *   }
  * }
@@ -56,15 +51,17 @@
     F_COUNTER(PinName f_in);
 
     /** Read measured frequency
-      * @param gate time
+      * @param gate time (uSec) gate = 1sec -> set 1000000
       * @return measured frequency
       */
-    uint32_t read_frequency(float gate_time);
+    uint32_t read_frequency(uint32_t gate_time);
 
 protected:
     DigitalIn _pin;
+    Timer _t;
 
     void initialize(void);
+    uint32_t rd_frq(uint32_t gate_time);
 
 private:
     uint32_t freq;