Add some lm3s6965 board specifics
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2657 42af7a65-404d-4744-a932-0658087f49c3
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@ -3,6 +3,80 @@ README
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README for NuttX port to the Stellaris LMS36965 Evaluation Kit
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Contents
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^^^^^^^^
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Stellaris LMS36965 Evaluation Kit
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Development Environment
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GNU Toolchain Options
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IDEs
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NuttX buildroot Toolchain
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USB Device Controller Functions
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Stellaris LM3S6965 Evaluation Kit Configuration Options
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Configurations
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Stellaris LMS36965 Evaluation Kit
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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The Stellaris LM3S6965 Evaluation Board includes the following features:
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o Stellaris LM3S6965 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 LM3S6965 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 LM3S6965 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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Development Environment
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^^^^^^^^^^^^^^^^^^^^^^^
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@ -139,63 +213,36 @@ NuttX buildroot Toolchain
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detailed PLUS some special instructions that you will need to follow if you are
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building a Cortex-M3 toolchain for Cygwin under Windows.
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Ethernet-Bootloader
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^^^^^^^^^^^^^^^^^^^
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NOTE: This is an OABI toolchain.
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Here are some notes about using the Luminary Ethernet boot-loader built
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into the Stellaris LM3S6965 Evaluation Kit.
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USB Device Controller Functions
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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Device Overview
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Built-In Application:
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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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- The board has no fixed IP address but uses DHCP to get an address.
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I used a D-link router; I can use a web browser to surf to the D-link
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web page to get the address assigned by DHCP.
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A small serial EEPROM holds the FT2232 configuration data. The EEPROM is not
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accessible by the LM3S6965 microcontroller. For full details on FT2232
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operation, go to www.ftdichip.com.
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- Then you can use this IP address in your browser to surf to the evaluation
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board. It presents several interesting pages -- the most important is
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the page called "Firmware Update". That page includes instructions on
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how to download code to the evaluation board.
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USB to JTAG/SWD
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- After you burn the first program, you lose this application. Then you
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will probably be better off connected directly to the Stellaris LM3S6965
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Evaluation Kit or through a switch (The router caused problems for me
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during downloads).
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The FT2232 USB device performs JTAG/SWD serial operations under the control
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of the debugger. A CPLD (U2) multiplexes SWD and JTAG functions and, when
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working in SWD mode, provides direction control for the bidirectional data
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line.
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Using the Ethernet Bootloader:
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Virtual COM Port
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- You will need the "LM Flash Programmer application". You can get that
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program from the Luminary web site. There is a link on the LM3S6918 page.
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- Is there any documentation for using the bootloader? Yes and No: There
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is an application note covering the bootloader on the Luminary site, but
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it is not very informative.
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- Are there any special things I have to do in my code, other than setting
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the origin to 0x0000:2000 (APP_START_ADDRESS)? No. The bootloader assumes
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that you have a vector table at that address . The bootloader does the
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following each time it boots (after you have downloaded the first valid
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application):
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o The bootloader sets the vector table register to the APP_START_ADDRESS,
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o It sets the stack pointer to the address at APP_START_ADDRESS, and then
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o Jumps to the address at APP_START_ADDRESS+4.
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- You can force the bootloader to skip starting the application and stay
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in the update mode. You will need to do this in order to download a new
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application. You force the update mode by holding the user button on the
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Stellaris LM3S6965 Evaluation Kit while resetting the board. The user
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button is GPIOA, pin 6 (call FORCED_UPDATE_PIN in the bootloader code).
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- Note 1: I had to remove my D-Link router from the configuration in order
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to use the LM Flash Programmer (the Bootloader issues BOOTP requests to
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communicate with the LM Flash Programmer, my router was responding to
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these BOOTP requests and hosing the download). It is safer to connect
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via a switch or via an Ethernet switch.
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- Note 2: You don't need the router's DHCPD server in the download
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configuration; the Luminary Flash Programmer has the capability of
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temporarily assigning the IP address to the Stellaris LM3S6965 Evaluation
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Kit via BOOTP.
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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 LM3S6965 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 LM3S6965 Evaluation Kit Configuration Options
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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@ -89,7 +89,7 @@
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/* LED definitions ******************************************************************/
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/* The Eagle-100 has only one user LED: Port E, Bit 1. Below is the mapping of this
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/* The LMS36965 Eval Kit has only one user LED: Port F, Bit 0. Below is the mapping of this
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* single LED. From this single LED, we can get the following information:
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*
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* OFF Steady: The system has failed to boot to the point of enabling interrupts
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@ -65,11 +65,33 @@
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/* LM3S6965 Eval Kit ***************************************************************/
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/* GPIO for microSD card chip select */
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/* GPIO Usage
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*
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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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*/
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/* GPIO for microSD card chip select */
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#define SDCCS_GPIO (GPIO_FUNC_OUTPUT | GPIO_PADTYPE_STDWPU | GPIO_STRENGTH_4MA | \
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GPIO_VALUE_ONE | GPIO_PORTG | 1)
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#define LED_GPIO (GPIO_FUNC_OUTPUT | GPIO_VALUE_ONE | GPIO_PORTE | 1)
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GPIO_VALUE_ONE | GPIO_PORTD | 0)
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#define LED_GPIO (GPIO_FUNC_OUTPUT | GPIO_VALUE_ONE | GPIO_PORTF | 0)
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/************************************************************************************
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* Public Functions
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