206 lines
7.3 KiB
Plaintext
206 lines
7.3 KiB
Plaintext
README
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^^^^^^
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README for NuttX port to the Stellaris EKK-LM3S9B96 Evaluation Kit
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Contents
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^^^^^^^^
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Stellaris EKK-LM3S9B96 Evaluation Kit
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Stellaris EKK-LM3S9B96 Evaluation Kit Configuration Options
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Configurations
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Stellaris EKK-LM3S9B96 Evaluation Kit
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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The EKK-LM3S9B96 evaluation kit provides the following features:
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o LM3S9B96 high-performance Stellaris microcontroller and large memory
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– 32-bit ARM® Cortex™-M3 core
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– 256 KB single-cycle Flash memory, 96 KB single-cycle SRAM, 23.7 KB single-cycle ROM
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o Ethernet 10/100 port with two LED indicators
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o USB 2.0 Full-Speed OTG port
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o SAFERTOS™ operating system in microcontroller ROM
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o Virtual serial communications port capability
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o Oversized board pads for GPIO access
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o User pushbutton and LED
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o Detachable ICDI board can be used for debugging other Luminary Micro boards
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o Easy to customize
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Features of the LM3S9B96 Microcontroller
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o ARM® Cortex™-M3 architecture
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– 80-MHz operation
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– ARM Cortex SysTick Timer
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– Integrated Nested Vectored Interrupt Controller (NVIC)
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o External Peripheral Interface (EPI)
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o 256 KB single-cycle flash
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o 96 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 Two 10-bit channels (inputs) when used as single-ended inputs
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o Three independent integrated analog comparators
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o Two CAN modules
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o Two I2C modules
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o Two SSI modules
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o Two Watchdog Timers (32-bit)
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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 eight 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 Up to 65 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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66 PB0/USB0ID USBID signal from the USB-On-the-Go
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67 PB1/USB0VBUS USB VBUS input signal from USB-OTG
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92 PB4/GPIO User pushbutton SW2.
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80 PC0/TCK/SWCLK JTAG or SWD clock input
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79 PC1/TMS/SWDIO JTAG TMS input or SWD bidirectional signal SWDIO
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78 PC2/TDI JTAG TDI signal input
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77 PC3/TDO/SWO JTAG TDO output or SWD trace signal SWO output.
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10 PD0/GPIO User LED
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60 PF2/LED1 Ethernet LED1 (yellow)
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59 PF3/LED0 Ethernet LED0 (green)
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83 PH3/USB0EPEN USB-OTG power switch
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76 PH4/USB0PFLT Overcurrent input status from USB-OTG power switch
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Stellaris EKK-LM3S9B96 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_LM3S9B96
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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=ekk-lm3s9b96 (for the Stellaris EKK-LM3S9b96 Evaluation Kit)
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CONFIG_ARCH_BOARD_name - For use in C code
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CONFIG_ARCH_BOARD_EKKLM3S9B96
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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=0x00018000 (96Kb)
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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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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 LM3S9B96.
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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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LM3S9B96 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 EKK-LM3S9b96 Evaluation Kit configuration is maintained in a
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sub-directory and can be selected as follow:
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tools/configure.sh ekk-lm3s9b96/<subdir>
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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. The
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Configuration enables both the serial and telnetd NSH interfaces.
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NOTE: As it is configured now, you MUST have a network connected.
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Otherwise, the NSH prompt will not come up because the Ethernet
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driver is waiting for the network to come up. That is probably
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a bug in the Ethernet driver behavior!
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