188 lines
6.4 KiB
Plaintext
188 lines
6.4 KiB
Plaintext
configs/pic32mz-starterkit README
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===============================
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This README file discusses the port of NuttX to the Microchip PIC32MZ
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Embedded Connectivity (EC) Starter Kit. There are two configurations of the
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starter kit:
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1) The PIC32MZ Embedded Connectivity Starter Kit based on the
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PIC32MZ2048ECH144-I/PH chip (DM320006), and
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2) The PIC32MZ Embedded Connectivity Starter Kit based on the
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PIC32MZ2048ECM144-I/PH w/Crypto Engine (DM320006-C)
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See www.microchip.com for further information.
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Key features of the PIC32MZ Starter Kit include;
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* On-board crystal or oscillator for precision microcontroller clocking
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(24 MHz).
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* 32 kHz oscillator for RTCC and Timer1 (optional).
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* Three push button switches for user-defined inputs.
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* Three user-defined indicator LEDs.
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* USB Type A receptacle connectivity for PIC32 host-based applications.
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* USB Type micro-AB receptacle for OTG and USB device connectivity for
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PIC32 OTG/device-based applications.
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* Daughter board connectors for flexible Ethernet PHY options.
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* 50 MHz Ethernet PHY oscillator.
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* External 4 GB SQI memory for expanded memory applications.
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* PIC24FJ256GB106 USB microcontroller for on-board debugging.
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* USB connectivity for on-board debugger communications.
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* Regulated +3.3V power supply for powering the starter kit through USB or
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expansion board.
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* Connector for various expansion boards.
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The PIC32MZ starter kit comes complete with a LAN8740 PHY daughter board.
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Contents
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========
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On Board Debug Support
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Creating Compatible NuttX HEX files
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Serial Console
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LEDs
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Configurations
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On Board Debug Support
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======================
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The starter kit includes a PIC24FJ256GB106 USB microcontroller that
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provides debugger connectivity over USB. The PIC24FJ256GB106 is hard-wired
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to the PIC32 device to provide protocol translation through the I/O pins
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of the PIC24FJ256GB106 to the ICSP™ pins of the PIC32 device.
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If MPLAB® REAL ICE™ or MPLAB ICD 3 is used with the starter kit,
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disconnect the onboard debugger from the PIC32 device by removing the
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jumper JP2. When the on-board debugger is required, replace the jumper
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JP2. When the jumper JP2 is installed, pin 1 must be connected to pin 3
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and pin 2 must be connected to pin 4.
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Creating Compatible NuttX HEX files
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===================================
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Intel Hex Format Files:
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-----------------------
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When NuttX is built it will produce two files in the top-level NuttX
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directory:
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1) nuttx - This is an ELF file, and
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2) nuttx.hex - This is an Intel Hex format file. This is controlled by
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the setting CONFIG_INTELHEX_BINARY in the .config file.
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The PICkit tool wants an Intel Hex format file to burn into FLASH. However,
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there is a problem with the generated nutt.hex: The tool expects the nuttx.hex
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file to contain physical addresses. But the nuttx.hex file generated from the
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top-level make will have address in the KSEG0 and KSEG1 regions.
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tools/pic32mx/mkpichex:
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----------------------
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There is a simple tool in the NuttX tools/pic32mx directory that can be
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used to solve both issues with the nuttx.hex file. But, first, you must
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build the tool:
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cd tools/pic32mx
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make
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Now you will have an excecutable file call mkpichex (or mkpichex.exe on
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Cygwin). This program will take the nutt.hex file as an input, it will
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convert all of the KSEG0 and KSEG1 addresses to physical address, and
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it will write the modified file, replacing the original nuttx.hex.
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To use this file, you need to do the following things:
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. ./setenv.sh # Source setenv.sh. Among other this, this script
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# will add the NuttX tools/pic32mx directory to your
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# PATH variable
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make # Build nuttx and nuttx.hex
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mkpichex $PWD # Convert addresses in nuttx.hex. $PWD is the path
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# to the top-level build directory. It is the only
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# required input to mkpichex.
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Serial Console
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==============
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To be provided
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LEDs and Buttons
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================
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LEDs
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----
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The PIC32MZ Ethernet Starter kit has 3 user LEDs labelled LED1-3 on the
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board:
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PIN LED Notes
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--- ----- -------------------------
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RH0 LED1 High illuminates (RED)
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RH1 LED3 High illuminates (YELLOW)
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RH2 LED2 High illuminates (GREEN)
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If CONFIG_ARCH_LEDS is defined, then NuttX will control these LEDs as
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follows:
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ON OFF
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------------------------- ---- ---- ---- ---- ---- ----
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LED1 LED2 LED3 LED1 LED2 LED3
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------------------------- ---- ---- ---- ---- ---- ----
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LED_STARTED 0 OFF OFF OFF --- --- ---
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LED_HEAPALLOCATE 1 ON OFF N/C --- --- ---
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LED_IRQSENABLED 2 OFF ON N/C --- --- ---
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LED_STACKCREATED 3 ON ON N/C --- --- ---
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LED_INIRQ 4 N/C N/C ON N/C N/C OFF
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LED_SIGNAL 4 N/C N/C ON N/C N/C OFF
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LED_ASSERTION 4 N/C N/C ON N/C N/C OFF
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LED_PANIC 5 ON N/C N/C OFF N/C N/C
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Buttons
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-------
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The PIC32MZ Ethernet Starter kit has 3 user push buttons labelled SW1-3 on
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the board:
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PIN LED Notes
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---- ---- -------------------------
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RB12 SW1 Active-low
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RB13 SW2 Active-low
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RB14 SW3 Active-low
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The switches do not have any debounce circuitry and require internal pull-
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up resistors. When Idle, the switches are pulled high (+3.3V), and they
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are grounded when pressed.
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Configurations
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==============
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Each PIC32MZ configuration is maintained in a sub-directory and can be
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selected as follow:
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cd tools
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./configure.sh pic32mz-starterkit/<subdir>
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cd -
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. ./setenv.sh
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Where <subdir> is one of the following:
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nsh:
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This is the NuttShell (NSH) using the NSH startup logic at
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apps/examples/nsh.
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NOTES:
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1. This configuration uses the mconf-based configuration tool. To
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change this configurations using that tool, you should:
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a. Build and install the kconfig-mconf tool. See nuttx/README.txt
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and misc/tools/
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b. Execute 'make menuconfig' in nuttx/ in order to start the
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reconfiguration process.
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2. Serial Output
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The OS test produces all of its test output on the serial console.
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This configuration has UART1 enabled as a serial console. I have
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been unable to get this UART work on the MEB. But on the Expansion
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I/O board, this maps to RX = J11 pin 41 and TX = J11 pin 43
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