v1.7.0 to optimize code for setInterval

### Releases v1.7.0

1. Optimize code for setInterval() of SAMD21 TC3. Check [setInterval on a running timer results in a period significantly longer than the specified period #17](#17)
2. Update `Packages_Patches`

CONTRIBUTING.md

@@ -15,7 +15,7 @@ If you don't find anything, please [open a new issue](https://github.com/khoih-p
 Please ensure to specify the following:
 
 * Arduino IDE version (e.g. 1.8.19) or Platform.io version
-* `SAMD` Core Version (e.g. Arduino SAMD core v1.8.12, Adafruit SAMD core v1.7.7, Seeed Studio SAMD v1.8.2, Sparkfun SAMD v1.8.1)
+* `SAMD` Core Version (e.g. Arduino SAMD core v1.8.13, Adafruit SAMD core v1.7.10, Seeed Studio SAMD v1.8.2, Sparkfun SAMD v1.8.1)
 * Contextual information (e.g. what you were trying to achieve)
 * Simplest possible steps to reproduce
 * Anything that might be relevant in your opinion, such as:
@@ -27,9 +27,9 @@ Please ensure to specify the following:
 
 ```
 Arduino IDE version: 1.8.19
-Arduino SAMD Core Version 1.8.12
+Arduino SAMD Core Version 1.8.13
 OS: Ubuntu 20.04 LTS
-Linux xy-Inspiron-3593 5.4.0-96-generic #109-Ubuntu SMP Wed Jan 12 16:49:16 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
+Linux xy-Inspiron-3593 5.13.0-40-generic #45~20.04.1-Ubuntu SMP Mon Apr 4 09:38:31 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
 
 Context:
 I encountered a crash while trying to use the Timer Interrupt.
@@ -50,3 +50,4 @@ There are usually some outstanding feature requests in the [existing issues list
 ### Sending Pull Requests
 
 Pull Requests with changes and fixes are also welcome!
+

README.md

@@ -155,15 +155,12 @@ The catch is **your function is now part of an ISR (Interrupt Service Routine),
 
  1. [`Arduino IDE 1.8.19+` for Arduino](https://github.com/arduino/Arduino). [![GitHub release](https://img.shields.io/github/release/arduino/Arduino.svg)](https://github.com/arduino/Arduino/releases/latest)
  2. [`Arduino SAMD core 1.8.13+`](https://github.com/arduino/ArduinoCore-samd) for SAMD ARM Cortex-M0+ boards. [![GitHub release](https://img.shields.io/github/release/arduino/ArduinoCore-samd.svg)](https://github.com/arduino/ArduinoCore-samd/releases/latest)
- 3. [`Adafruit SAMD core 1.7.9+`](https://github.com/adafruit/ArduinoCore-samd) for SAMD ARM Cortex-M0+ and M4 boards (Nano 33 IoT, etc.). [![GitHub release](https://img.shields.io/github/release/adafruit/ArduinoCore-samd.svg)](https://github.com/adafruit/ArduinoCore-samd/releases/latest)
+ 3. [`Adafruit SAMD core 1.7.10+`](https://github.com/adafruit/ArduinoCore-samd) for SAMD ARM Cortex-M0+ and M4 boards (Nano 33 IoT, etc.). [![GitHub release](https://img.shields.io/github/release/adafruit/ArduinoCore-samd.svg)](https://github.com/adafruit/ArduinoCore-samd/releases/latest)
  4. [`Seeeduino SAMD core 1.8.2+`](https://github.com/Seeed-Studio/ArduinoCore-samd) for SAMD21/SAMD51 boards (XIAO M0, Wio Terminal, etc.). [![Latest release](https://img.shields.io/github/release/Seeed-Studio/ArduinoCore-samd.svg)](https://github.com/Seeed-Studio/ArduinoCore-samd/releases/latest/)
  5. [`Sparkfun SAMD core 1.8.1+`](https://github.com/sparkfun/Arduino_Boards) for SAMD21/SAMD51 boards (SparkFun_RedBoard_Turbo, SparkFun_SAMD51_Thing_Plus, etc.).
  6. [`Blynk library 1.0.1`](https://github.com/blynkkk/blynk-library/releases). [![Latest release](https://img.shields.io/github/release/blynkkk/blynk-library.svg)](https://github.com/blynkkk/blynk-library/releases/latest/) to use with some examples. Don't use Blynk beta versions.
  7. To use with some examples, depending on which Ethernet card you're using:
-   - [`Ethernet library v2.0.0+`](https://github.com/arduino-libraries/Ethernet) for W5100, W5200 and W5500.  [![GitHub release](https://img.shields.io/github/release/arduino-libraries/Ethernet.svg)](https://github.com/arduino-libraries/Ethernet/releases/latest)
-   - [`EthernetLarge library v2.0.0+`](https://github.com/OPEnSLab-OSU/EthernetLarge) for W5100, W5200 and W5500.
-   - [`Ethernet2 library v1.0.4+`](https://github.com/khoih-prog/Ethernet2) for W5500. [![GitHub release](https://img.shields.io/github/release/adafruit/Ethernet2.svg)](https://github.com/adafruit/Ethernet2/releases/latest)
-   - [`Ethernet3 library v1.5.5+`](https://github.com/sstaub/Ethernet3) for W5500/WIZ550io/WIZ850io/USR-ES1 with Wiznet W5500 chip. [![GitHub release](https://img.shields.io/github/release/sstaub/Ethernet3.svg)](https://github.com/sstaub/Ethernet3/releases/latest)
+   - [`Ethernet_Generic library v2.1.0+`](https://github.com/khoih-prog/Ethernet_Generic) for W5100, W5200 and W5500/WIZ550io/WIZ850io/USR-ES1 with Wiznet W5500 chip.  [![GitHub release](https://img.shields.io/github/release/khoih-prog/Ethernet_Generic.svg)](https://github.com/khoih-prog/Ethernet_Generic/releases/latest)
    - [`EthernetENC library v2.0.2+`](https://github.com/jandrassy/EthernetENC) for ENC28J60. [![GitHub release](https://img.shields.io/github/release/jandrassy/EthernetENC.svg)](https://github.com/jandrassy/EthernetENC/releases/latest). **New and Better**
    - [`UIPEthernet library v2.0.11+`](https://github.com/UIPEthernet/UIPEthernet) for ENC28J60. [![GitHub release](https://img.shields.io/github/release/UIPEthernet/UIPEthernet.svg)](https://github.com/UIPEthernet/UIPEthernet/releases/latest)
  7. To use with some examples
@@ -193,7 +190,7 @@ Another way to install is to:
 
 1. Install [VS Code](https://code.visualstudio.com/)
 2. Install [PlatformIO](https://platformio.org/platformio-ide)
-3. Install [**SAMD_TimerInterrupt** library](https://platformio.org/lib/show/11396/SAMD_TimerInterrupt) or [**SAMD_TimerInterrupt** library](https://platformio.org/lib/show/11412/SAMD_TimerInterrupt) by using [Library Manager](https://platformio.org/lib/show/11412/SAMD_TimerInterrupt/installation). Search for **SAMD_TimerInterrupt** in [Platform.io Author's Libraries](https://platformio.org/lib/search?query=author:%22Khoi%20Hoang%22)
+3. Install [**SAMD_TimerInterrupt** library](https://registry.platformio.org/libraries/khoih-prog/SAMD_TimerInterrupt) by using [Library Manager](https://registry.platformio.org/libraries/khoih-prog/SAMD_TimerInterrupt/installation). Search for **SAMD_TimerInterrupt** in [Platform.io Author's Libraries](https://platformio.org/lib/search?query=author:%22Khoi%20Hoang%22)
 4. Use included [platformio.ini](platformio/platformio.ini) file from examples to ensure that all dependent libraries will installed automatically. Please visit documentation for the other options and examples at [Project Configuration File](https://docs.platformio.org/page/projectconf.html)
 
 ---
@@ -203,13 +200,13 @@ Another way to install is to:
 
 #### 1. For Arduino SAMD boards
 
- ***To be able to compile, run and automatically detect and display BOARD_NAME on Arduino SAMD (Nano-33-IoT, etc) boards***, you have to copy the whole [Arduino SAMD Packages_Patches](Packages_Patches/arduino/hardware/samd/1.8.12) directory into Arduino SAMD directory (~/.arduino15/packages/arduino/hardware/samd/1.8.12).
+ ***To be able to compile, run and automatically detect and display BOARD_NAME on Arduino SAMD (Nano-33-IoT, etc) boards***, you have to copy the whole [Arduino SAMD Packages_Patches](Packages_Patches/arduino/hardware/samd/1.8.13) directory into Arduino SAMD directory (~/.arduino15/packages/arduino/hardware/samd/1.8.13).
 
 #### For core version v1.8.10+
 
-Supposing the Arduino SAMD version is 1.8.12. Now only one file must be copied into the directory:
+Supposing the Arduino SAMD version is 1.8.13. Now only one file must be copied into the directory:
 
-- `~/.arduino15/packages/arduino/hardware/samd/1.8.12/platform.txt`
+- `~/.arduino15/packages/arduino/hardware/samd/1.8.13/platform.txt`
 
 Whenever a new version is installed, remember to copy this files into the new version directory. For example, new version is x.yy.zz
 
@@ -242,13 +239,13 @@ Whenever the above-mentioned compiler error issue is fixed with the new Arduino
 
 #### 2. For Adafruit SAMD boards
 
- ***To be able to compile, run and automatically detect and display BOARD_NAME on Adafruit SAMD (Itsy-Bitsy M4, etc) boards***, you have to copy the whole [Adafruit SAMD Packages_Patches](Packages_Patches/adafruit/hardware/samd/1.7.6) directory into Adafruit samd directory (~/.arduino15/packages/adafruit/hardware/samd/1.7.6). 
+ ***To be able to compile, run and automatically detect and display BOARD_NAME on Adafruit SAMD (Itsy-Bitsy M4, etc) boards***, you have to copy the whole [Adafruit SAMD Packages_Patches](Packages_Patches/adafruit/hardware/samd/1.7.9) directory into Adafruit samd directory (~/.arduino15/packages/adafruit/hardware/samd/1.7.9). 
 
-Supposing the Adafruit SAMD core version is 1.7.6. This file must be copied into the directory:
+Supposing the Adafruit SAMD core version is 1.7.9. This file must be copied into the directory:
 
-- `~/.arduino15/packages/adafruit/hardware/samd/1.7.6/platform.txt`
-- `~/.arduino15/packages/adafruit/hardware/samd/1.7.6/cores/arduino/Print.h`
-- `~/.arduino15/packages/adafruit/hardware/samd/1.7.6/cores/arduino/Print.cpp`
+- `~/.arduino15/packages/adafruit/hardware/samd/1.7.9/platform.txt`
+- `~/.arduino15/packages/adafruit/hardware/samd/1.7.9/cores/arduino/Print.h`
+- `~/.arduino15/packages/adafruit/hardware/samd/1.7.9/cores/arduino/Print.cpp`
 
 Whenever a new version is installed, remember to copy this file into the new version directory. For example, new version is x.yy.zz
 This file must be copied into the directory:
@@ -540,7 +537,7 @@ While software timer, **programmed for 2s, is activated after 7.937s !!!**. Then
 
 ```
 Starting ISR_Timer_Complex_WiFiNINA on SAMD_NANO_33_IOT
-SAMDTimerInterrupt v1.6.0
+SAMDTimerInterrupt v1.7.0
 CPU Frequency = 48 MHz
 [TISR] SAMDTimerInterrupt: F_CPU (MHz) = 48 , TIMER_HZ = 48
 [TISR] TC_Timer::startTimer _Timer = 0x 42002c00 , TC3 = 0x 42002c00
@@ -605,7 +602,7 @@ The following is the sample terminal output when running example [**TimerInterru
 
 ```
 Starting TimerInterruptTest on ITSYBITSY_M4
-SAMDTimerInterrupt v1.6.0
+SAMDTimerInterrupt v1.7.0
 CPU Frequency = 48 MHz
 [TISR] SAMDTimerInterrupt: F_CPU (MHz) = 120 , TIMER_HZ = 48
 [TISR] TC_Timer::startTimer _Timer = 0x 0x4101c000 , TC3 = 0x 0x4101c000
@@ -683,7 +680,7 @@ The following is the sample terminal output when running example [**Argument_Non
 
 ```
 Starting Argument_None on SAMD_NANO_33_IOT
-SAMDTimerInterrupt v1.6.0
+SAMDTimerInterrupt v1.7.0
 CPU Frequency = 48 MHz
 [TISR] SAMDTimerInterrupt: F_CPU (MHz) = 48 , TIMER_HZ = 48
 [TISR] TC_Timer::startTimer _Timer = 0x 42002c00 , TC3 = 0x 42002c00
@@ -733,7 +730,7 @@ 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 v1.6.0
+SAMDTimerInterrupt v1.7.0
 CPU Frequency = 48 MHz
 [TISR] SAMDTimerInterrupt: F_CPU (MHz) = 48 , TIMER_HZ = 48
 [TISR] TC_Timer::startTimer _Timer = 0x 42002c00 , TC3 = 0x 42002c00
@@ -857,7 +854,7 @@ The following is the sample terminal output when running example [Change_Interva
 
 ```
 Starting Change_Interval on SAMD_NANO_33_IOT
-SAMDTimerInterrupt v1.6.0
+SAMDTimerInterrupt v1.7.0
 CPU Frequency = 48 MHz
 [TISR] SAMDTimerInterrupt: F_CPU (MHz) = 48 , TIMER_HZ = 48
 [TISR] TC_Timer::startTimer _Timer = 0x 42002c00 , TC3 = 0x 42002c00
@@ -921,7 +918,7 @@ The following is the sample terminal output when running example [RepeatedAttach
 
 ```
 Starting RepeatedAttachInterrupt_uS on SEEED_XIAO_M0
-SAMDTimerInterrupt v1.6.0
+SAMDTimerInterrupt v1.7.0
 CPU Frequency = 48 MHz
 [TISR] _period = 19995 , frequency = 50.01
 [TISR] SAMDTimerInterrupt: F_CPU (MHz) = 48 , TIMER_HZ = 48
@@ -1029,6 +1026,7 @@ Submit issues to: [SAMD_TimerInterrupt issues](https://github.com/khoih-prog/SAM
 6. Fix `multiple-definitions` linker error
 7. Add support to many more boards, such as `SAMD21E1xA`, `SAMD21G1xA` and`SAMD21J1xA`
 8. Optimize library code by using `reference-passing` instead of `value-passing`
+9. Optimize code for setInterval() of SAMD21 TC3
 
 ---
 ---
@@ -1044,6 +1042,7 @@ Many thanks for everyone for bug reporting, new feature suggesting, testing and
 5. Thanks to [generationmake](https://github.com/generationmake) to make a PR in [change variable period from unsigned long to float #7](https://github.com/khoih-prog/SAMD_TimerInterrupt/pull/7) leading to new release v1.5.0.
 6. Thanks to [Alexander Golovanov](https://github.com/homeodor) to propose a PR in [Add more SAMD21 #10](https://github.com/khoih-prog/SAMD_TimerInterrupt/pull/10) leading to the support of many new boards in new release v1.6.0
 7. Thanks to [Will Powell](https://github.com/WillPowellUk) to report the bug in [Multiple Definition Error Not fixed by swapping src_cpp or src_h with src #9](https://github.com/khoih-prog/SAMD_TimerInterrupt/issues/9) leading to new release v1.6.0.
+8. Thanks to [Dave Hooper](https://github.com/stripwax) to report the bug and propose the fix in [setInterval on a running timer results in a period significantly longer than the specified period #17](https://github.com/khoih-prog/SAMD_TimerInterrupt/issues/17) leading to new release v1.7.0.
 
 
 <table>
@@ -1057,6 +1056,7 @@ Many thanks for everyone for bug reporting, new feature suggesting, testing and
   </tr>
   <tr>
     <td align="center"><a href="https://github.com/WillPowellUk"><img src="https://github.com/WillPowellUk.png" width="100px;" alt="WillPowellUk"/><br /><sub><b>Will Powell</b></sub></a><br /></td>
+    <td align="center"><a href="https://github.com/stripwax"><img src="https://github.com/stripwax.png" width="100px;" alt="stripwax"/><br /><sub><b>Dave Hooper</b></sub></a><br /></td>
   </tr> 
 </table>
 

changelog.md

@@ -12,6 +12,7 @@
 ## Table of Contents
 
 * [Changelog](#changelog)
+  * [Releases v1.7.0](#releases-v170)
   * [Releases v1.6.0](#releases-v160)
   * [Releases v1.5.0](#releases-v150)
   * [Releases v1.4.0](#releases-v140)
@@ -28,6 +29,11 @@
 
 ## Changelog
 
+### Releases v1.7.0
+
+1. Optimize code for setInterval() of SAMD21 TC3. Check [setInterval on a running timer results in a period significantly longer than the specified period #17](https://github.com/khoih-prog/SAMD_TimerInterrupt/issues/17)
+2. Update `Packages_Patches`
+
 ### Releases v1.6.0
 
 1. Fix `multiple-definitions` linker error. Drop `src_cpp` and `src_h` directories

library.json

@@ -1,6 +1,6 @@
 {
   "name": "SAMD_TimerInterrupt",
-  "version": "1.6.0",
+  "version": "1.7.0",
   "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.",
   "authors":

library.properties

@@ -1,5 +1,5 @@
 name=SAMD_TimerInterrupt
-version=1.6.0
+version=1.7.0
 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.

platformio/platformio.ini

@@ -36,6 +36,8 @@ upload_speed = 921600
 
 ; Checks for the compatibility with frameworks and dev/platforms
 lib_compat_mode = strict
+lib_ldf_mode = chain+
+;lib_ldf_mode = deep+
 
 lib_deps =  
 

src/SAMDTimerInterrupt.h

@@ -16,7 +16,7 @@
   Based on BlynkTimer.h
   Author: Volodymyr Shymanskyy
   
-  Version: 1.6.0
+  Version: 1.7.0
 
   Version Modified By   Date      Comments
   ------- -----------  ---------- -----------
@@ -29,6 +29,7 @@
   1.4.0   K.Hoang      02/06/2021 Fix SAMD21 rare bug caused by not fully init Prescaler
   1.5.0   K.Hoang      08/10/2021 Improve frequency precision by using float instead of ulong
   1.6.0   K.Hoang      20/01/2022 Fix `multiple-definitions` linker error. Add support to many more boards
+  1.7.0   K.Hoang      25/04/2022 Optimize code for setInterval() of SAMD21 TC3
 *****************************************************************************************************************************/
 /*
   SAMD21