v1.101 using float for interval

### Releases v1.10.1

1. Using `float` instead of `ulong` for interval
2. Prevent overflow of SAMD51 TCx by flagging error

README.md

@@ -617,7 +617,7 @@ While software timer, **programmed for 2s, is activated after 7.937s !!!**. Then
 
 ```
 Starting ISR_Timer_Complex_WiFiNINA on SAMD_NANO_33_IOT
-SAMDTimerInterrupt v1.10.0
+SAMDTimerInterrupt v1.10.1
 CPU Frequency = 48 MHz
 [TISR] SAMDTimerInterrupt: F_CPU (MHz) = 48 , TIMER_HZ = 48
 [TISR] TC_Timer::startTimer _Timer = 0x 42002c00 , TC3 = 0x 42002c00
@@ -682,7 +682,7 @@ The following is the sample terminal output when running example [**TimerInterru
 
 ```
 Starting TimerInterruptTest on ITSYBITSY_M4
-SAMDTimerInterrupt v1.10.0
+SAMDTimerInterrupt v1.10.1
 CPU Frequency = 48 MHz
 [TISR] SAMDTimerInterrupt: F_CPU (MHz) = 120 , TIMER_HZ = 48
 [TISR] TC_Timer::startTimer _Timer = 0x 0x4101c000 , TC3 = 0x 0x4101c000
@@ -760,7 +760,7 @@ The following is the sample terminal output when running example [**Argument_Non
 
 ```
 Starting Argument_None on SAMD_NANO_33_IOT
-SAMDTimerInterrupt v1.10.0
+SAMDTimerInterrupt v1.10.1
 CPU Frequency = 48 MHz
 [TISR] SAMDTimerInterrupt: F_CPU (MHz) = 48 , TIMER_HZ = 48
 [TISR] TC_Timer::startTimer _Timer = 0x 42002c00 , TC3 = 0x 42002c00
@@ -810,7 +810,7 @@ In this example, 16 independent ISR Timers are used, yet utilized just one Hardw
 
 ```
 Starting ISR_16_Timers_Array on SAMD_NANO_33_IOT
-SAMDTimerInterrupt v1.10.0
+SAMDTimerInterrupt v1.10.1
 CPU Frequency = 48 MHz
 [TISR] SAMDTimerInterrupt: F_CPU (MHz) = 48 , TIMER_HZ = 48
 [TISR] TC_Timer::startTimer _Timer = 0x 42002c00 , TC3 = 0x 42002c00
@@ -934,7 +934,7 @@ The following is the sample terminal output when running example [Change_Interva
 
 ```
 Starting Change_Interval on SAMD_NANO_33_IOT
-SAMDTimerInterrupt v1.10.0
+SAMDTimerInterrupt v1.10.1
 CPU Frequency = 48 MHz
 [TISR] SAMDTimerInterrupt: F_CPU (MHz) = 48 , TIMER_HZ = 48
 [TISR] TC_Timer::startTimer _Timer = 0x 42002c00 , TC3 = 0x 42002c00
@@ -998,7 +998,7 @@ The following is the sample terminal output when running example [RepeatedAttach
 
 ```
 Starting RepeatedAttachInterrupt_uS on SEEED_XIAO_M0
-SAMDTimerInterrupt v1.10.0
+SAMDTimerInterrupt v1.10.1
 CPU Frequency = 48 MHz
 [TISR] _period = 19995 , frequency = 50.01
 [TISR] SAMDTimerInterrupt: F_CPU (MHz) = 48 , TIMER_HZ = 48
@@ -1065,7 +1065,7 @@ The following is the sample terminal output when running example [SAMD21_MultiTi
 
 ```
 Starting SAMD21_MultiTimers on SAMD_NANO_33_IOT
-SAMDTimerInterrupt v1.10.0
+SAMDTimerInterrupt v1.10.1
 CPU Frequency = 48 MHz
 [TISR] _period = 20000.00 , frequency = 50.00
 [TISR] _timerNumber = 0
@@ -1181,6 +1181,7 @@ Submit issues to: [SAMD_TimerInterrupt issues](https://github.com/khoih-prog/SAM
 13. Add functions `attachInterruptInterval_MS()` and `setInterval_MS()`
 14. Avoid conflict with Servo library. Check [Cannot use TimerInterrupt_Generic Library in the same time than Servo Library #11](https://github.com/khoih-prog/TimerInterrupt_Generic/discussions/11)
 15. Prevent overflow of TCx by flagging error
+16. Using float instead of ulong for interval
 
 ---
 ---

changelog.md

@@ -12,6 +12,7 @@
 ## Table of Contents
 
 * [Changelog](#changelog)
+  * [Releases v1.10.1](#releases-v1101)
   * [Releases v1.10.0](#releases-v1100)
   * [Releases v1.9.0](#releases-v190)
   * [Releases v1.8.0](#releases-v180)
@@ -32,10 +33,15 @@
 
 ## Changelog
 
+### Releases v1.10.1
+
+1. Using float instead of ulong for interval
+2. Prevent overflow of SAMD51 TCx by flagging error
+
 ### Releases v1.10.0
 
 1. Avoid conflict with Servo library. Check [Cannot use TimerInterrupt_Generic Library in the same time than Servo Library #11](https://github.com/khoih-prog/TimerInterrupt_Generic/discussions/11)
-2. Prevent overflow of TCx by flagging error
+2. Prevent overflow of SAMD21 TCx by flagging error
 3. Modify all examples
 4. Update `Packages_Patches`
 

library.json

@@ -1,6 +1,6 @@
 {
   "name": "SAMD_TimerInterrupt",
-  "version": "1.10.0",
+  "version": "1.10.1",
   "keywords": "timing, device, control, timer, interrupt, hardware, isr, isr-based, hardware-timer, isr-timer, isr-based-timer, mission-critical, accuracy, precise, non-blocking, samd, samd21, samd51, nano-33-iot",
   "description": "This library enables you to use Interrupt from Hardware Timers on SAMD-based boards. It now supports 16 ISR-based timers, while consuming only 1 Hardware Timer. Timers' interval is very long (ulong millisecs). The most important feature is they're ISR-based timers. Therefore, their executions are not blocked by bad-behaving functions or tasks. This important feature is absolutely necessary for mission-critical tasks. These hardware timers, using interrupt, still work even if other functions are blocking. Moreover, they are much more precise (certainly depending on clock frequency accuracy) than other software timers using millis() or micros(). That's necessary if you need to measure some data requiring better accuracy. SAMD21 now can use 6 Timers",
   "authors":

library.properties

@@ -1,5 +1,5 @@
 name=SAMD_TimerInterrupt
-version=1.10.0
+version=1.10.1
 author=Khoi Hoang <khoih.prog@gmail.com>
 maintainer=Khoi Hoang <khoih.prog@gmail.com>
 sentence=This library enables you to use Interrupt from Hardware Timers on SAMD-based boards such as SAMD21 Nano-33-IoT, Adafruit SAMD51 Itsy-Bitsy M4, SeeedStudio XIAO, Sparkfun SAMD51_MICROMOD, etc.

src/SAMDTimerInterrupt.h

@@ -16,7 +16,7 @@
   Based on BlynkTimer.h
   Author: Volodymyr Shymanskyy
   
-  Version: 1.10.0
+  Version: 1.10.1
 
   Version  Modified By   Date      Comments
   -------  -----------  ---------- -----------
@@ -33,6 +33,7 @@
   1.8.0    K.Hoang      07/05/2022 Scrap the buggy code in v1.7.0 for TC3
   1.9.0    K.Hoang      08/05/2022 Add TC4, TC5, TCC1 and TCC2 Timers to SAMD21
   1.10.0   K.Hoang      29/09/2022 Avoid conflict with Servo library. Modify all examples. Prevent overflow of TCx
+  1.10.1   K.Hoang      30/09/2022 Using float instead of ulong for interval. Prevent overflow of SAMD51 TCx
 *****************************************************************************************************************************/
 /*
   SAMD21

src/SAMDTimerInterrupt.hpp

@@ -15,8 +15,8 @@
   Copyright (c) 2010 OTTOTECNICA Italy
   Based on BlynkTimer.h
   Author: Volodymyr Shymanskyy
-  
-  Version: 1.10.0
+
+  Version: 1.10.1
 
   Version  Modified By   Date      Comments
   -------  -----------  ---------- -----------
@@ -33,6 +33,7 @@
   1.8.0    K.Hoang      07/05/2022 Scrap the buggy code in v1.7.0 for TC3
   1.9.0    K.Hoang      08/05/2022 Add TC4, TC5, TCC1 and TCC2 Timers to SAMD21
   1.10.0   K.Hoang      29/09/2022 Avoid conflict with Servo library. Modify all examples. Prevent overflow of TCx
+  1.10.1   K.Hoang      30/09/2022 Using float instead of ulong for interval. Prevent overflow of SAMD51 TCx
 *****************************************************************************************************************************/
 /*
   SAMD21
@@ -155,13 +156,13 @@
 #include "Arduino.h"
 
 #ifndef SAMD_TIMER_INTERRUPT_VERSION
-  #define SAMD_TIMER_INTERRUPT_VERSION            "SAMDTimerInterrupt v1.10.0"
+  #define SAMD_TIMER_INTERRUPT_VERSION            "SAMDTimerInterrupt v1.10.1"
 
   #define SAMD_TIMER_INTERRUPT_VERSION_MAJOR      1
   #define SAMD_TIMER_INTERRUPT_VERSION_MINOR      10
-  #define SAMD_TIMER_INTERRUPT_VERSION_PATCH      0
+  #define SAMD_TIMER_INTERRUPT_VERSION_PATCH      1
 
-  #define SAMD_TIMER_INTERRUPT_VERSION_INT        1010000
+  #define SAMD_TIMER_INTERRUPT_VERSION_INT        1010001
 #endif
 
 #include "TimerInterrupt_Generic_Debug.h"
@@ -245,7 +246,7 @@ class SAMDTimerInterrupt
 
     // interval (in microseconds) and duration (in milliseconds). Duration = 0 or not specified => run indefinitely
     // No params and duration now. To be added in the future by adding similar functions here or to SAMD-hal-timer.c
-    bool setInterval(const unsigned long& interval, timerCallback callback)
+    bool setInterval(const float& interval, timerCallback callback)
     {
       return setFrequency((float) (1000000.0f / interval), callback);
     }
@@ -254,7 +255,7 @@ class SAMDTimerInterrupt
 
     // interval (in milliseconds) and duration (in milliseconds). Duration = 0 or not specified => run indefinitely
     // No params and duration now. To be added in the future by adding similar functions here or to SAMD-hal-timer.c
-    bool setInterval_MS(const unsigned long& interval, timerCallback callback)
+    bool setInterval_MS(const float& interval, timerCallback callback)
     {
       return setFrequency((float) (1000.0f / interval), callback);
     }
@@ -270,7 +271,7 @@ class SAMDTimerInterrupt
 
     // interval (in microseconds) and duration (in milliseconds). Duration = 0 or not specified => run indefinitely
     // No params and duration now. To be added in the future by adding similar functions here or to SAMD-hal-timer.c
-    bool attachInterruptInterval(const unsigned long& interval, timerCallback callback)
+    bool attachInterruptInterval(const float& interval, timerCallback callback)
     {
       return setFrequency( (float) ( 1000000.0f / interval), callback);
     }
@@ -279,7 +280,7 @@ class SAMDTimerInterrupt
 
     // interval (in milliseconds) and duration (in milliseconds). Duration = 0 or not specified => run indefinitely
     // No params and duration now. To be added in the future by adding similar functions here or to SAMD-hal-timer.c
-    bool attachInterruptInterval_MS(const unsigned long& interval, timerCallback callback)
+    bool attachInterruptInterval_MS(const float& interval, timerCallback callback)
     {
       return setFrequency( (float) ( 1000.0f / interval), callback);
     }
@@ -545,7 +546,7 @@ class SAMDTimerInterrupt
 
     // interval (in microseconds) and duration (in milliseconds). Duration = 0 or not specified => run indefinitely
     // No params and duration now. To be added in the future by adding similar functions here or to SAMD-hal-timer.c
-    bool setInterval(const unsigned long& interval, timerCallback callback)
+    bool setInterval(const float& interval, timerCallback callback)
     {
       return setFrequency((float) (1000000.0f / interval), callback);
     }
@@ -554,7 +555,7 @@ class SAMDTimerInterrupt
 
     // interval (in milliseconds) and duration (in milliseconds). Duration = 0 or not specified => run indefinitely
     // No params and duration now. To be added in the future by adding similar functions here or to SAMD-hal-timer.c
-    bool setInterval_MS(const unsigned long& interval, timerCallback callback)
+    bool setInterval_MS(const float& interval, timerCallback callback)
     {
       return setFrequency((float) (1000.0f / interval), callback);
     }
@@ -570,7 +571,7 @@ class SAMDTimerInterrupt
 
     // interval (in microseconds) and duration (in milliseconds). Duration = 0 or not specified => run indefinitely
     // No params and duration now. To be added in the future by adding similar functions here or to SAMD-hal-timer.c
-    bool attachInterruptInterval(const unsigned long& interval, timerCallback callback)
+    bool attachInterruptInterval(const float& interval, timerCallback callback)
     {
       return setFrequency( (float) ( 1000000.0f / interval), callback);
     }
@@ -579,7 +580,7 @@ class SAMDTimerInterrupt
 
     // interval (in milliseconds) and duration (in milliseconds). Duration = 0 or not specified => run indefinitely
     // No params and duration now. To be added in the future by adding similar functions here or to SAMD-hal-timer.c
-    bool attachInterruptInterval_MS(const unsigned long& interval, timerCallback callback)
+    bool attachInterruptInterval_MS(const float& interval, timerCallback callback)
     {
       return setFrequency( (float) ( 1000.0f / interval), callback);
     }

src/SAMDTimerInterrupt_Impl.h

@@ -15,8 +15,8 @@
   Copyright (c) 2010 OTTOTECNICA Italy
   Based on BlynkTimer.h
   Author: Volodymyr Shymanskyy
-  
-  Version: 1.10.0
+
+  Version: 1.10.1
 
   Version  Modified By   Date      Comments
   -------  -----------  ---------- -----------
@@ -33,6 +33,7 @@
   1.8.0    K.Hoang      07/05/2022 Scrap the buggy code in v1.7.0 for TC3
   1.9.0    K.Hoang      08/05/2022 Add TC4, TC5, TCC1 and TCC2 Timers to SAMD21
   1.10.0   K.Hoang      29/09/2022 Avoid conflict with Servo library. Modify all examples. Prevent overflow of TCx
+  1.10.1   K.Hoang      30/09/2022 Using float instead of ulong for interval. Prevent overflow of SAMD51 TCx
 *****************************************************************************************************************************/
 /*
   SAMD21
@@ -84,6 +85,16 @@
     {    
       TISR_LOGWARN3(F("SAMDTimerInterrupt: F_CPU (MHz) ="), F_CPU/1000000, F(", TIMER_HZ ="), TIMER_HZ/1000000);
       TISR_LOGWARN3(F("TC_Timer::startTimer _Timer = 0x"), String((uint32_t) _SAMDTimer, HEX), F(", TC3 = 0x"), String((uint32_t) TC3, HEX));
+
+      // maxPermittedPeriod = 1,398,101.33us for 48MHz timer clock
+      float maxPermittedPeriod = (65536.0f * 1024) / (TIMER_HZ / 1000000.0f );
+
+      if (_period > maxPermittedPeriod )
+      {
+        TISR_LOGERROR3(F("Max permissible _period (us) ="),  maxPermittedPeriod, F(", current _period (us) ="), _period);
+
+        return false;
+      }
 
       // Enable the TC bus clock, use clock generator 0
       GCLK->PCHCTRL[TC3_GCLK_ID].reg = GCLK_PCHCTRL_GEN_GCLK1_Val | (1 << GCLK_PCHCTRL_CHEN_Pos);
@@ -108,7 +119,7 @@
       TC3_callback  = callback;
 
       setPeriod_TIMER_TC3(_period);
-
+           
       return true;
     }
     else
@@ -273,12 +284,13 @@
     {    
       TISR_LOGDEBUG1(F("_timerNumber ="), _timerNumber);
 
-      // maxPermittedPeriod = 1,398,101.33us for 48MHz clock
-      float maxPermittedPeriod = (65536.0f * 1024) / (F_CPU / 1000000.0f );
+      // maxPermittedPeriod = 1,398,101.33us for 48MHz timer clock
+      float maxPermittedPeriod = (65536.0f * 1024) / (TIMER_HZ / 1000000.0f );
 
       if (_period > maxPermittedPeriod )
       {
         TISR_LOGERROR3(F("Max permissible _period (us) ="),  maxPermittedPeriod, F(", current _period (us) ="), _period);
+
         return false;
       }
 

src/SAMD_ISR_Timer-Impl.h

@@ -19,7 +19,7 @@
   Based on BlynkTimer.h
   Author: Volodymyr Shymanskyy
 
-  Version: 1.10.0
+  Version: 1.10.1
 
   Version  Modified By   Date      Comments
   -------  -----------  ---------- -----------
@@ -36,6 +36,7 @@
   1.8.0    K.Hoang      07/05/2022 Scrap the buggy code in v1.7.0 for TC3
   1.9.0    K.Hoang      08/05/2022 Add TC4, TC5, TCC1 and TCC2 Timers to SAMD21
   1.10.0   K.Hoang      29/09/2022 Avoid conflict with Servo library. Modify all examples. Prevent overflow of TCx
+  1.10.1   K.Hoang      30/09/2022 Using float instead of ulong for interval. Prevent overflow of SAMD51 TCx
 *****************************************************************************************************************************/
 
 #pragma once

src/SAMD_ISR_Timer.h

@@ -19,7 +19,7 @@
   Based on BlynkTimer.h
   Author: Volodymyr Shymanskyy
 
-  Version: 1.10.0
+  Version: 1.10.1
 
   Version  Modified By   Date      Comments
   -------  -----------  ---------- -----------
@@ -36,6 +36,7 @@
   1.8.0    K.Hoang      07/05/2022 Scrap the buggy code in v1.7.0 for TC3
   1.9.0    K.Hoang      08/05/2022 Add TC4, TC5, TCC1 and TCC2 Timers to SAMD21
   1.10.0   K.Hoang      29/09/2022 Avoid conflict with Servo library. Modify all examples. Prevent overflow of TCx
+  1.10.1   K.Hoang      30/09/2022 Using float instead of ulong for interval. Prevent overflow of SAMD51 TCx
 *****************************************************************************************************************************/
 
 #pragma once

src/SAMD_ISR_Timer.hpp

@@ -19,7 +19,7 @@
   Based on BlynkTimer.h
   Author: Volodymyr Shymanskyy
 
-  Version: 1.10.0
+  Version: 1.10.1
 
   Version  Modified By   Date      Comments
   -------  -----------  ---------- -----------
@@ -36,6 +36,7 @@
   1.8.0    K.Hoang      07/05/2022 Scrap the buggy code in v1.7.0 for TC3
   1.9.0    K.Hoang      08/05/2022 Add TC4, TC5, TCC1 and TCC2 Timers to SAMD21
   1.10.0   K.Hoang      29/09/2022 Avoid conflict with Servo library. Modify all examples. Prevent overflow of TCx
+  1.10.1   K.Hoang      30/09/2022 Using float instead of ulong for interval. Prevent overflow of SAMD51 TCx
 *****************************************************************************************************************************/
 
 #pragma once