319 lines
12 KiB
Plaintext
319 lines
12 KiB
Plaintext
README
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^^^^^^
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README for NuttX port to the Stellaris LMS38962 Evaluation Kit
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Contents
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^^^^^^^^
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Stellaris LMS38962 Evaluation Kit
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OLED
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USB Device Controller Functions
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Stellaris LM3S8962 Evaluation Kit Configuration Options
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Configurations
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Stellaris LMS38962 Evaluation Kit
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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The Stellaris LM3S8962 Evaluation Board includes the following features:
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o Stellaris LM3S8962 microcontroller with fully-integrated 10/100 embedded
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Ethernet controller
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o Simple setup; USB cable provides serial communication, debugging, and
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power
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o OLED graphics display with 128 x 96 pixel resolution
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o User LED, navigation switches, and select pushbuttons
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o Magnetic speaker
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o LM3S8962 I/O available on labeled break-out pads
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o Standard ARM® 20-pin JTAG debug connector with input and output modes
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o USB interface for debugging and power supply
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o MicroSD card slot
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Features of the LM3S8962 Microcontroller
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o 32-bit RISC performance using ARM® Cortex™-M3 v7M architecture
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– 50-MHz operation
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– Hardware-division and single-cycle-multiplication
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– Integrated Nested Vectored Interrupt Controller (NVIC)
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– 42 interrupt channels with eight priority levels
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o 256 KB single-cycle flash
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o 64 KB single-cycle SRAM
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o Four general-purpose 32-bit timers
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o Integrated Ethernet MAC and PHY
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o Three fully programmable 16C550-type UARTs
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o Four 10-bit channels (inputs) when used as single-ended inputs
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o Two independent integrated analog comparators
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o Two I2C modules
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o Three PWM generator blocks
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– One 16-bit counter
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– Two comparators
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– Produces two independent PWM signals
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– One dead-band generator
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o Two QEI modules with position integrator for tracking encoder position
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o 0 to 42 GPIOs, depending on user configuration
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o On-chip low drop-out (LDO) voltage regulator
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GPIO Usage
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PIN SIGNAL EVB Function
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--- ----------- ---------------------------------------
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26 PA0/U0RX Virtual COM port receive
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27 PA1/U0TX Virtual COM port transmit
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10 PD0/IDX0 SD card chip select
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11 PD1/PWM1 Sound
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30 PA4/SSI0RX SD card data out
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31 PA5/SSI0TX SD card and OLED display data in
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28 PA2/SSI0CLK SD card and OLED display clock
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22 PC7/PHB0 OLED display data/control select
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29 PA3/SSI0FSS OLED display chip select
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73 PE1/PWM5 Down switch
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74 PE2/PHB1 Left switch
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72 PE0/PWM4 Up switch
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75 PE3/PHA1 Right switch
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61 PF1/IDX1 Select switch
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47 PF0/PWM0 User LED
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23 PC6/CCP3 Enable +15 V
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OLED
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^^^^
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The Evaluation Kit includes an OLED graphics display. Features:
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- RiT P14201 series display
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- 128 columns by 96 rows
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- 4-bit, 16-level gray scale.
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- High-contrast (typ. 500:1)
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- Excellent brightness (120 cd/m2)
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- Fast 10 us response.
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The OLED display has a built-in controller IC with synchronous serial and
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parallel interfaces (SSD1329). Synchronous serial (SSI) is used on the EVB.
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The SSI port is shared with the microSD card slot.
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- PC7: OLED display data/control select (D/Cn)
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- PA3: OLED display chip select (CSn)
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NOTE: Newer versions of the LM3S8962 Evaluation Kit has an OSAM 128x64x4 OLED
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display. Some tweaks to drivers/lcd/p14201.c would be required to support that
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LCD.
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USB Device Controller Functions
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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Device Overview
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An FT2232 device from Future Technology Devices International Ltd manages
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USB-to-serial conversion. The FT2232 is factory configured by Luminary
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Micro to implement a JTAG/SWD port (synchronous serial) on channel A and
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a Virtual COM Port (VCP) on channel B. This feature allows two simultaneous
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communications links between the host computer and the target device using
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a single USB cable. Separate Windows drivers for each function are provided
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on the Documentation and Software CD.
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Debugging with JTAG/SWD
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The FT2232 USB device performs JTAG/SWD serial operations under the control
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of the debugger or the Luminary Flash Programmer. It also operate as an
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In-Circuit Debugger Interface (ICDI), allowing debugging of any external
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target board. Debugging modes:
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MODE DEBUG FUNCTION USE SELECTED BY
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1 Internal ICDI Debug on-board LM3S8962 Default Mode
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microcontroller over USB
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interface.
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2 ICDI out to JTAG/SWD The EVB is used as a USB Connecting to an external
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header to SWD/JTAG interface to target and starting debug
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an external target. software. The red Debug Out
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LED will be ON.
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3 In from JTAG/SWD For users who prefer an Connecting an external
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header external debug interface debugger to the JTAG/SWD
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(ULINK, JLINK, etc.) with header.
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the EVB.
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Virtual COM Port
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The Virtual COM Port (VCP) allows Windows applications (such as HyperTerminal)
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to communicate with UART0 on the LM3S8962 over USB. Once the FT2232 VCP
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driver is installed, Windows assigns a COM port number to the VCP channel.
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Stellaris LM3S8962 Evaluation Kit Configuration Options
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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CONFIG_ARCH - Identifies the arch/ subdirectory. This should
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be set to:
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CONFIG_ARCH=arm
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CONFIG_ARCH_family - For use in C code:
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CONFIG_ARCH_ARM=y
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CONFIG_ARCH_architecture - For use in C code:
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CONFIG_ARCH_CORTEXM3=y
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CONFIG_ARCH_CHIP - Identifies the arch/*/chip subdirectory
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CONFIG_ARCH_CHIP=lm
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CONFIG_ARCH_CHIP_name - For use in C code to identify the exact
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chip:
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CONFIG_ARCH_CHIP_LM3S8962
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CONFIG_ARCH_BOARD - Identifies the configs subdirectory and
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hence, the board that supports the particular chip or SoC.
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CONFIG_ARCH_BOARD=lm3s8962-ek (for the Stellaris LM3S8962 Evaluation Kit)
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CONFIG_ARCH_BOARD_name - For use in C code
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CONFIG_ARCH_BOARD_LM3S8962EK
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CONFIG_ARCH_LOOPSPERMSEC - Must be calibrated for correct operation
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of delay loops
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CONFIG_ENDIAN_BIG - define if big endian (default is little
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endian)
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CONFIG_RAM_SIZE - Describes the installed DRAM (SRAM in this case):
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CONFIG_RAM_SIZE=0x00010000 (64Kb)
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CONFIG_RAM_START - The start address of installed DRAM
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CONFIG_RAM_START=0x20000000
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CONFIG_ARCH_LEDS - Use LEDs to show state. Unique to boards that
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have LEDs
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CONFIG_ARCH_INTERRUPTSTACK - This architecture supports an interrupt
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stack. If defined, this symbol is the size of the interrupt
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stack in bytes. If not defined, the user task stacks will be
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used during interrupt handling.
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CONFIG_ARCH_STACKDUMP - Do stack dumps after assertions
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CONFIG_ARCH_LEDS - Use LEDs to show state. Unique to board architecture.
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CONFIG_ARCH_CALIBRATION - Enables some build in instrumentation that
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cause a 100 second delay during boot-up. This 100 second delay
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serves no purpose other than it allows you to calibratre
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CONFIG_ARCH_LOOPSPERMSEC. You simply use a stop watch to measure
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the 100 second delay then adjust CONFIG_ARCH_LOOPSPERMSEC until
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the delay actually is 100 seconds.
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There are configurations for disabling support for interrupts GPIO ports.
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GPIOJ must be disabled because it does not exist on the LM3S8962.
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Additional interrupt support can be disabled if desired to reduce memory
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footprint.
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CONFIG_TIVA_GPIOA_IRQS=y
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CONFIG_TIVA_GPIOB_IRQS=y
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CONFIG_TIVA_GPIOC_IRQS=y
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CONFIG_TIVA_GPIOD_IRQS=y
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CONFIG_TIVA_GPIOE_IRQS=y
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CONFIG_TIVA_GPIOF_IRQS=y
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CONFIG_TIVA_GPIOG_IRQS=y
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CONFIG_TIVA_GPIOH_IRQS=y
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CONFIG_TIVA_GPIOJ_IRQS=n << Always
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LM3S8962 specific device driver settings
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CONFIG_UARTn_SERIAL_CONSOLE - selects the UARTn for the
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console and ttys0 (default is the UART0).
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CONFIG_UARTn_RXBUFSIZE - Characters are buffered as received.
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This specific the size of the receive buffer
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CONFIG_UARTn_TXBUFSIZE - Characters are buffered before
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being sent. This specific the size of the transmit buffer
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CONFIG_UARTn_BAUD - The configure BAUD of the UART. Must be
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CONFIG_UARTn_BITS - The number of bits. Must be either 7 or 8.
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CONFIG_UARTn_PARTIY - 0=no parity, 1=odd parity, 2=even parity
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CONFIG_UARTn_2STOP - Two stop bits
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CONFIG_TIVA_SSI0 - Select to enable support for SSI0
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CONFIG_TIVA_SSI1 - Select to enable support for SSI1
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CONFIG_SSI_POLLWAIT - Select to disable interrupt driven SSI support.
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Poll-waiting is recommended if the interrupt rate would be to
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high in the interrupt driven case.
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CONFIG_SSI_TXLIMIT - Write this many words to the Tx FIFO before
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emptying the Rx FIFO. If the SPI frequency is high and this
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value is large, then larger values of this setting may cause
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Rx FIFO overrun errors. Default: half of the Tx FIFO size (4).
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CONFIG_TIVA_ETHERNET - This must be set (along with CONFIG_NET)
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to build the Stellaris Ethernet driver
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CONFIG_TIVA_ETHLEDS - Enable to use Ethernet LEDs on the board.
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CONFIG_TIVA_BOARDMAC - If the board-specific logic can provide
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a MAC address (via tiva_ethernetmac()), then this should be selected.
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CONFIG_TIVA_ETHHDUPLEX - Set to force half duplex operation
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CONFIG_TIVA_ETHNOAUTOCRC - Set to suppress auto-CRC generation
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CONFIG_TIVA_ETHNOPAD - Set to suppress Tx padding
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CONFIG_TIVA_MULTICAST - Set to enable multicast frames
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CONFIG_TIVA_PROMISCUOUS - Set to enable promiscuous mode
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CONFIG_TIVA_BADCRC - Set to enable bad CRC rejection.
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CONFIG_TIVA_DUMPPACKET - Dump each packet received/sent to the console.
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Configurations
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^^^^^^^^^^^^^^
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Each Stellaris LM3S8962 Evaluation Kit configuration is maintained in a
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sub-directory and can be selected as follow:
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cd tools
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./configure.sh lm3s8962-ek/<subdir>
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cd -
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Where <subdir> is one of the following:
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nsh:
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Configures the NuttShell (nsh) located at 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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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. This configuration uses Cygwin under Windows with the NuttX buildroot
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tool chain. This is eaily change by modifying the following:
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CONFIG_HOST_WINDOWS=y
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CONFIG_WINDOWS_CYGWIN=y
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CONFIG_ARMV7M_TOOLCHAIN_BUILDROOT=y
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3. The configuration enables both the serial and telnetd NSH interfaces.
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4. As it is configured now, you MUST have a network connected. Otherwise,
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the NSH prompt will not come up because the Ethernet driver is waiting
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for the network to come up. That is probably a bug in the Ethernet
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driver behavior!
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nx
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An example using the NuttX graphics system (NX). This example
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focuses on general window controls, movement, mouse and keyboard
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input.
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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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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. This configuration uses Cygwin under Windows with the NuttX buildroot
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tool chain. This is eaily change by modifying the following:
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CONFIG_HOST_WINDOWS=y
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CONFIG_WINDOWS_CYGWIN=y
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CONFIG_ARMV7M_TOOLCHAIN_BUILDROOT=y
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