185 lines
6.4 KiB
Plaintext
185 lines
6.4 KiB
Plaintext
README for the XMC4500 Relax
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============================
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The directory provides board support for the Infineon XMC4500 Relax v1
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boards. There are to variants of this board: There is a Lite version
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that has fewer features, for example, no 32.768KHz crystal.
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The current configurations support only the Lite version of the board.
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Status
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======
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2017-03-21: The XMC4500 Relax boots into NSH, provides the NSH prompt,
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and the LEDs are working. But there is a problem with serial input.
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The most likely reason for this is there are no serial RX interripts.
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Serial Console
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==============
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Be default, UART0 (aka, USIC0, channel 0) is used as the serial console.
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The RX and TX pins is available:
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RX - P1.4, Connector X2, pin 17
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TX - P1.5, Connector X2, pin 16
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GND - Available on pins 1-4 of either connector X1 or X2
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VDD3.3 - Available on pins 37-38 of either connector X1 or X2
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VDD5 - Available on pins 39-40 of either connector X1 or X2
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A TTL to RS-232 converter or a USB TTL-to-USB serial adaptor is required.
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The notion of what is TX and what is RX depends on your point of view.
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With the TTL to RS-232 converter, I connect pin 17 to the pin labeled
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TX on the converter and pin 16 to the RX pin on the converter.
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LEDs
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====
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The XMC4500 Relax Lite v1 board has two LEDs:
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LED1 P1.1 High output illuminates
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LED2 P1.0 High output illuminates
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If CONFIG_ARCH_LEDS is not defined, then the user can control the LEDs in
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any way. The definitions provided in the board.h header file can be used
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to access individual LEDs.
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These LEDs are not used by the board port unless CONFIG_ARCH_LEDS is
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defined. In that case, the usage by the board port is defined in
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include/board.h and src/sam_autoleds.c. The LEDs are used to encode
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OS-related events as follows:
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SYMBOL Meaning LED state
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LED1 LED2
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------------------ ------------------------ ------ ------
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LED_STARTED NuttX has been started OFF OFF
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LED_HEAPALLOCATE Heap has been allocated OFF OFF
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LED_IRQSENABLED Interrupts enabled OFF OFF
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LED_STACKCREATED Idle stack created ON OFF
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LED_INIRQ In an interrupt No change
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LED_SIGNAL In a signal handler No change
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LED_ASSERTION An assertion failed No change
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LED_PANIC The system has crashed N/C Blinking
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LED_IDLE MCU is is sleep mode Not used
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Thus if LED1 is statically on, NuttX has successfully booted and is,
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apparently, running normally. If LED2 is flashing at approximately
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2Hz, then a fatal error has been detected and the system has halted.
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Buttons
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=======
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The XMC4500 Relax Lite v1 board has two buttons:
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BUTTON1 P1.14 Low input sensed when button pressed
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BUTTON2 P1.15 Low input sensed when button pressed
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Configurations
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==============
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Information Common to All Configurations
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----------------------------------------
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Each XMC4500 Relax configuration is maintained in a sub-directory and
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can be selected as follow:
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.tools/configure.sh xmc5400-relax:<subdir>
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See '.tools/configure.sh -h' for a list of all options. The most typical
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are -l to select the Linux host or -c to select the Windows Cygwin host.
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Before starting the build, make sure that your PATH environment variable
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includes the correct path to your toolchain.
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And then build NuttX by simply typing the following. At the conclusion of
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the make, the nuttx binary will reside in an ELF file called, simply, nuttx.
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make
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The <subdir> that is provided above as an argument to the tools/configure.sh
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must be is one of the following.
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NOTES:
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1. These configurations use the mconf-based configuration tool. To
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change any of these 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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see additional README.txt files in the NuttX tools repository.
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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. Unless stated otherwise, all configurations generate console
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output on UART0 (aka USIC0, channel 0) as described above under
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"Serial Console". The relevant configuration settings are listed
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below:
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CONFIG_XMC4_USIC0=y
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CONFIG_XMC4_USIC0_CHAN0_ISUART=y
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CONFIG_XMC4_USIC0_CHAN1_NONE=y
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CONFIG_UART0_SERIALDRIVER=y
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CONFIG_UART0_SERIAL_CONSOLE=y
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CONFIG_UART0_RXBUFSIZE=256
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CONFIG_UART0_TXBUFSIZE=256
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CONFIG_UART0_BAUD=115200
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CONFIG_UART0_BITS=8
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CONFIG_UART0_PARITY=0
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CONFIG_UART0_2STOP=0
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3. All of these configurations are set up to build under Windows using
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the "GNU Tools for ARM Embedded Processors" that is maintained by
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ARM (unless stated otherwise in the description of the configuration).
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https://developer.arm.com/open-source/gnu-toolchain/gnu-rm
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That toolchain selection can easily be reconfigured using
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'make menuconfig'. Here are the relevant current settings:
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Build Setup:
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CONFIG_HOST_WINDOWS=y : Window environment
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CONFIG_WINDOWS_CYGWIN=y : Cywin under Windows
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System Type -> Toolchain:
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CONFIG_ARMV7M_TOOLCHAIN_GNU_EABI=y : GNU ARM EABI toolchain
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Configuration sub-directories
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-----------------------------
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nsh:
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Configures the NuttShell (nsh) located at examples/nsh. This
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configuration is focused on low level, command-line driver testing. It
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has no network.
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NOTES:
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1. NSH built-in applications are supported.
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Binary Formats:
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CONFIG_BUILTIN=y : Enable support for built-in programs
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Application Configuration:
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CONFIG_NSH_BUILTIN_APPS=y : Enable starting apps from NSH command line
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SPI
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===
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Using MAX6675 Thermocouple
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--------------------------
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There is a board support to use a MAX6675 connected to SPI2. In other to use
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it you need to enable these options:
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CONFIG_XMC4_USIC=y
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CONFIG_XMC4_USCI_UART=y
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CONFIG_XMC4_USCI_SPI=y
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CONFIG_XMC4_SPI2=y
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CONFIG_XMC4_USIC1=y
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CONFIG_XMC4_USIC1_CHAN0_ISSPI=y
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CONFIG_XMC4_USIC1_CHAN1_ISUART=y
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CONFIG_UART3_SERIAL_CONSOLE=y
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CONFIG_SENSORS_MAX6675=y
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These are the used SPI pins: SCLK = P0.11, MISO = P0.4 and CS = P0.2
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