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[bsp][mchp] update README.md

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# 1. Microchip BSP Introduction
# Microchip BSP
## 1. Microchip BSP Introduction
Supported Microchip SAM (ARM Cortex-Mx Core) MCU is as following：
## ARM Cortex-M23 Series
### ARM Cortex-M23 Series
- saml10 | 3.3V Cortex-M23 with ultra low power
- saml11 | 3.3V Cortex-M23 with ultra low power and trust-zone
## ARM Cortex-M0+ Series
### ARM Cortex-M0+ Series
- samc21 | 5V Cortex-M0+ with 2 CAN-FD support
- saml21 | 3.3V low power Cortex-M0+
- samd21 | 3.3V industrial level Cortex-M0+
## ARM Cortex-M4 Series
### ARM Cortex-M4 Series
- same54 | 3.3V 120MHz Cortex-M4F core with CAN-FD/USB/Ethernet support
## ARM Cortex-M7 Series
### ARM Cortex-M7 Series
- same70 | 3.3V 300MHz Cortex-M7 core with CAN-FD/High speed USB/Ethernet support
## Directory description：
### Directory description：
* applications:
* user main function entrance,
* driver example - like i2c, can, adc ...
@ -29,197 +36,195 @@ Supported Microchip SAM (ARM Cortex-Mx Core) MCU is as following：
* MCU BSP files - startup file, peripheral drivers, configuation headers and linker script
* generated from start.atmel.com - DO NOT modify it
# 2. RT-Thread porting guide of Microchip SAM MCU
## 2. RT-Thread porting guide of Microchip SAM MCU
## 2.1 Configure project BSP on Atmel Start
### 2.1 Configure project BSP on Atmel Start
* Visit <https://start.atmel.com/#> and click CREATE NEW PROJECT.
Visit <https://start.atmel.com/#> and click CREATE NEW PROJECT.
![](doc/2-1-1-atmel-start-online.png)
* Input MCU part number and then select device, click CREATE NEW PROJECT.
Input MCU part number and then select device, click CREATE NEW PROJECT.
![](doc/2-1-2-atmel-start-newproject.png)
* Add STDIO and other driver/middleware to project.
Add STDIO and other driver/middleware to project.
![](doc/2-1-3-atmel-start-add-STDIO.png)
* Configure STDIO driver.
Configure STDIO driver.
![](doc/2-1-4-atmel-start-driver-stdio.png)
* Configure CAN module clock.
Configure CAN module clock.
![](doc/2-1-5-atmel-start-can-clock.png)
* Configure CAN module driver.
Configure CAN module driver.
![](doc/2-1-6-atmel-start-driver-can0.png)
![](doc/2-1-6-atmel-start-driver-can1.png)
* Add LED pin description.
Add LED pin description.
![](doc/2-1-8-atmel-start-add-LED0.png)
* Rename project.
Rename project.
![](doc/2-1-7-atmel-start-rename-project.png)
* Save project configuration.
Save project configuration.
![](doc/2-1-9-atmel-start-save-configuration.png)
* Export project source code.
Export project source code.
![](doc/2-1-10-atmel-start-export-project.png)
## 2.2 Add project to RT-Thread source code
### 2.2 Add project to RT-Thread source code
* Link: <https://github.com/RT-Thread/rt-thread> and download RT souce code.
Link: <https://github.com/RT-Thread/rt-thread> and download RT souce code.
![](doc/2-2-1-atmel-start-download-RT-Thread.png)
* Unzip downloaded RT-Thread and SAME70 CAN Example
Unzip downloaded RT-Thread and SAME70 CAN Example
![](doc/2-2-2-atmel-start-unzip-file.png)
* Enter rt-thread-xxx/bsp/microchip directory and copy same70 folder and rename it to same70q20.
Enter *rt-thread-xxx/bsp/microchip* directory and copy **same70** folder and rename it to **same70q20**.
![](doc/2-2-3-atmel-start-copy-file.png)
* Enter same70q20 directory and remove all files except SConscript file.
Enter same70q20 directory and remove all files except SConscript file.
![](doc/2-2-4-atmel-start-remove-old-files.png)
* Copy all files from SAME70 CAN Example to rt-thread-xxx/bsp/microchip/same70q20/bsp.
Copy all files from SAME70 CAN Example to rt-thread-xxx/bsp/microchip/same70q20/bsp.
![](doc/2-2-5-atmel-start-copy-files.png)
* Modify rt-thread-xxx\bsp\microchip\same70q20\rtconfig.py.
Modify rt-thread-xxx\bsp\microchip\same70q20\rtconfig.py.
![](doc/2-2-6-atmel-start-modify-file0.png)
* Modify rt-thread-xxx\bsp\microchip\same70q20\bsp\SConscript.
Modify rt-thread-xxx\bsp\microchip\same70q20\bsp\SConscript.
![](doc/2-2-6-atmel-start-modify-file1.png)
* Modify rt-thread-xxx\bsp\microchip\same70q20\bsp\same70b\gcc\gcc\same70q20b_flash.ld.
Modify rt-thread-xxx\bsp\microchip\same70q20\bsp\same70b\gcc\gcc\same70q20b_flash.ld.
![](doc/2-2-6-atmel-start-modify-file2.png)
* Modify rt-thread-xxx\bsp\microchip\same70q20\bsp\same70b\gcc\gcc\startup_same70q20b.c.
Modify rt-thread-xxx\bsp\microchip\same70q20\bsp\same70b\gcc\gcc\startup_same70q20b.c.
![](doc/2-2-6-atmel-start-modify-file3.png)
* Alright, now you can use RT-Thread env tools to compile the project.
Alright, now you can use RT-Thread env tools to compile the project.
## 2.3 Compile project with RT-Thread env tools
### 2.3 Compile project with RT-Thread env tools
About RT-Thread env tools, click [Here](https://github.com/RT-Thread/rt-thread/blob/master/documentation/env/env.md).
* Download RT-Thread env tools <https://www.rt-thread.org/download.html#download-rt-thread-env-tool>
Download RT-Thread env tools <https://www.rt-thread.org/download.html#download-rt-thread-env-tool>
![](doc/2-3-1-atmel-start-download-env-tools.png)
* Unzip downloaded file and run env.exe.
Unzip downloaded file and run env.exe.
![](doc/2-3-2-atmel-start-run-env-tools.png)
* Enter your project directory and run scons command to compile it.
Enter your project directory and run scons command to compile it.
![](doc/2-3-3-atmel-start-env-tools-compile.png)
* Compile error you may have and proposed solution.
Compile error you may have and proposed solution.
![](doc/2-3-4-atmel-start-env-tools-errors.png)
* Fix compiling error
Fix compiling error
![](doc/2-3-5-atmel-start-env-tools-fixerrors.png)
* Compiling success
Compiling success
![](doc/2-3-6-atmel-start-env-tools-compiling-OK.png)
* In the following chapter I will show you how to debug RT-Thread with Studio 7.
In the following chapter I will show you how to debug RT-Thread with Studio 7.
# 3. RT-Thread debugging with Microchip IDE
## 3. RT-Thread debugging with Microchip IDE
* Link: <https://www.microchip.com/en-us/tools-resources/develop/microchip-studio>, download & install Microchip Studio 7.
Link: <https://www.microchip.com/en-us/tools-resources/develop/microchip-studio>, download & install Microchip Studio 7.
![](doc/3-1-1-atmel-start-Studio7-download.png)
* Open installed Microchip Studio 7 and open object file for debugging.
Open installed Microchip Studio 7 and open object file for debugging.
![](doc/3-1-2-atmel-start-Studio7-open-objects.png)
* Choose object file, fill project name and select where to save this project.
Choose object file, fill project name and select where to save this project.
![](doc/3-1-3-atmel-start-Studio7-import-debug.png)
* Select the right part number and complete object set up.
Select the right part number and complete object set up.
![](doc/3-1-4-atmel-start-Studio7-select-device.png)
* Object file import complete and you can see related files are linked to project.
Object file import complete and you can see related files are linked to project.
![](doc/3-1-5-atmel-start-Studio7-project-complete.png)
* Right click the project and choose the debug tools in project propertities setting.
Right click the project and choose the debug tools in project propertities setting.
![](doc/3-1-6-atmel-start-Studio7-project-properties.png)
* Choose debugger/programmer and debugger interface - SWD or JTGA.
Choose debugger/programmer and debugger interface - SWD or JTGA.
![](doc/3-1-7-atmel-start-Studio7-select-tools.png)
* Press debugging button and enjoy your debugging journey.
Press debugging button and enjoy your debugging journey.
![](doc/3-1-8-atmel-start-Studio7-start-debugging1.png)
* Debugging start and you can add breakpoint.
Debugging start and you can add breakpoint.
![](doc/3-1-8-atmel-start-Studio7-start-debugging2.png)
* Debugging paused at breakpoint and you can monitor local variables at Watch window.
Debugging paused at breakpoint and you can monitor local variables at Watch window.
![](doc/3-1-8-atmel-start-Studio7-start-debugging3.png)
* Debugging message output.
Debugging message output.
![](doc/3-1-9-atmel-start-rt-thread-run.png)
# 4. Reconfigure MCU BSP
## 4. Reconfigure MCU BSP
* Visit <https://start.atmel.com/#> and upload project configuration.
Visit <https://start.atmel.com/#> and upload project configuration.
![](doc/4-1-1-atmel-start-Studio7-reimport-project.png)
* Now you can reconfigure your project.
Now you can reconfigure your project.
![](doc/4-1-2-atmel-start-Studio7-project-configurtion.png)
# 5. Microchip SAM MCU BSP configuration and user guide
## 5. Microchip SAM MCU BSP configuration and user guide
* Please refer to <ASF4 API Reference Manual> for more details
[ASF4 API Reference Manual](https://ww1.microchip.com/downloads/en/DeviceDoc/50002633B.pdf)
Please refer to [ASF4 API Reference Manual](https://ww1.microchip.com/downloads/en/DeviceDoc/50002633B.pdf) for more details
## 5.1 SAMC2x/E5x/E70 CAN Driver
### 5.1 SAMC2x/E5x/E70 CAN Driver
* CAN driver configuration.
CAN driver configuration.
![](doc/5-1-1-atmel-start-driver-can0.png)
![](doc/5-1-1-atmel-start-driver-can1.png)
* CAN driver user guide - see <ASF4 API Reference Manual.pdf> P121 for more details.
CAN driver user guide - see [ASF4 API Reference Manual](https://ww1.microchip.com/downloads/en/DeviceDoc/50002633B.pdf) P121 for more details.
* To be continued.
To be continued.
# 6. Contact Info
## 6. Contact Info
- [Kevin Liu](https://github.com/klmchp)
* https://github.com/klmchp && kevin.liu.mchp@gmail.com
- [Kevin Liu](https://github.com/klmchp), email: <kevin.liu.mchp@gmail.com>
- [luhuadong](https://github.com/luhuadong), email: <luhuadong@163.com>