e5dfd805e6
Add support for LPC40xx family chips
* Corrected a few peripheral definitions and pin functions for the LPC17xx family.
Added configuration options, chip definitions, and additional pin functions for the LPC40xx family.
Added board configurations for Embedded Artists LPC4088 Quickstart board and LPC4088 Developer's kit. These configurations are still something of a work in progress. In particular, the LCD functionality is untested.
* First pass rename in *.c and *.h files.
* Renamed LPC17XX to LPC17XX_40XX in config files
* Rplaced LPC17xx with LPC17xx/LPC40xx in .c files
* Replaced LPC17xx with LPC17xx/LPC40xx in .h files
* Updated some documentation
* Working on moving directories
* moved arch/arm/src/lpc17xx and arch/arm/include/lpc17xx to lpc17xx_40xx
* Renamed LPC17_* constants / configuration options to LPC17_40_*
* Updated chip family name defines
* Renamed some chip-specific files
* Updated references to renamed files
* Updated references to lpc17_ to lpc17_40_
* Renamed source files from lpc17_* to lpc17_40_*
* Clean up white space
Approved-by: Gregory Nutt <gnutt@nuttx.org>
271 lines
9.3 KiB
Plaintext
271 lines
9.3 KiB
Plaintext
README
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^^^^^^
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README for NuttX port to the mbed.org LPC1768 board (http://mbed.org/)
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Contents
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^^^^^^^^
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mbed Configuration Options
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USB Host Configuration
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Configurations
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mbed 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=lpc17xx
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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_LPC1768=y
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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=mbed (for the mbed.org board)
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CONFIG_ARCH_BOARD_name - For use in C code
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CONFIG_ARCH_BOARD_MBED=y
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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 (CPU SRAM in this case):
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CONFIG_RAM_SIZE=(32*1024) (32Kb)
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There is an additional 32Kb of SRAM in AHB SRAM banks 0 and 1.
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CONFIG_RAM_START - The start address of installed DRAM
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CONFIG_RAM_START=0x10000000
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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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Individual subsystems can be enabled:
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CONFIG_LPC17_40_MAINOSC=y
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CONFIG_LPC17_40_PLL0=y
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CONFIG_LPC17_40_PLL1=n
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CONFIG_LPC17_40_ETHERNET=n
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CONFIG_LPC17_40_USBHOST=n
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CONFIG_LPC17_40_USBOTG=n
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CONFIG_LPC17_40_USBDEV=n
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CONFIG_LPC17_40_UART0=y
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CONFIG_LPC17_40_UART1=n
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CONFIG_LPC17_40_UART2=n
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CONFIG_LPC17_40_UART3=n
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CONFIG_LPC17_40_CAN1=n
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CONFIG_LPC17_40_CAN2=n
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CONFIG_LPC17_40_SPI=n
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CONFIG_LPC17_40_SSP0=n
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CONFIG_LPC17_40_SSP1=n
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CONFIG_LPC17_40_I2C0=n
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CONFIG_LPC17_40_I2C1=n
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CONFIG_LPC17_40_I2S=n
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CONFIG_LPC17_40_TMR0=n
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CONFIG_LPC17_40_TMR1=n
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CONFIG_LPC17_40_TMR2=n
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CONFIG_LPC17_40_TMR3=n
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CONFIG_LPC17_40_RIT=n
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CONFIG_LPC17_40_PWM0=n
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CONFIG_LPC17_40_MCPWM=n
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CONFIG_LPC17_40_QEI=n
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CONFIG_LPC17_40_RTC=n
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CONFIG_LPC17_40_WDT=n
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CONFIG_LPC17_40_ADC=n
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CONFIG_LPC17_40_DAC=n
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CONFIG_LPC17_40_GPDMA=n
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CONFIG_LPC17_40_FLASH=n
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LPC17xx/LPC40xx 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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LPC17xx/LPC40xx specific CAN device driver settings. These settings all
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require CONFIG_CAN:
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CONFIG_CAN_EXTID - Enables support for the 29-bit extended ID. Default
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Standard 11-bit IDs.
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CONFIG_LPC17_40_CAN1_BAUD - CAN1 BAUD rate. Required if CONFIG_LPC17_40_CAN1
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is defined.
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CONFIG_LPC17_40_CAN2_BAUD - CAN1 BAUD rate. Required if CONFIG_LPC17_40_CAN2
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is defined.
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CONFIG_LPC17_40_CAN1_DIVISOR - CAN1 is clocked at CCLK divided by this
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number. (the CCLK frequency is divided by this number to get the CAN
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clock). Options = {1,2,4,6}. Default: 4.
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CONFIG_LPC17_40_CAN2_DIVISOR - CAN2 is clocked at CCLK divided by this
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number. (the CCLK frequency is divided by this number to get the CAN
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clock). Options = {1,2,4,6}. Default: 4.
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CONFIG_LPC17_40_CAN_TSEG1 - The number of CAN time quanta in segment 1.
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Default: 6
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CONFIG_LPC17_40_CAN_TSEG2 = the number of CAN time quanta in segment 2.
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Default: 7
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LPC17xx/LPC40xx specific PHY/Ethernet device driver settings. These setting
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also require CONFIG_NET and CONFIG_LPC17_40_ETHERNET.
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CONFIG_ETH0_PHY_KS8721 - Selects Micrel KS8721 PHY
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CONFIG_LPC17_40_PHY_AUTONEG - Enable auto-negotion
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CONFIG_LPC17_40_PHY_SPEED100 - Select 100Mbit vs. 10Mbit speed.
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CONFIG_LPC17_40_PHY_FDUPLEX - Select full (vs. half) duplex
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CONFIG_LPC17_40_EMACRAM_SIZE - Size of EMAC RAM. Default: 16Kb
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CONFIG_LPC17_40_ETH_NTXDESC - Configured number of Tx descriptors. Default: 18
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CONFIG_LPC17_40_ETH_NRXDESC - Configured number of Rx descriptors. Default: 18
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CONFIG_LPC17_40_ETH_WOL - Enable Wake-up on Lan (not fully implemented).
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CONFIG_NET_REGDEBUG - Enabled low level register debug. Also needs
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CONFIG_DEBUG_FEATURES.
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CONFIG_NET_DUMPPACKET - Dump all received and transmitted packets.
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Also needs CONFIG_DEBUG_FEATURES.
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CONFIG_LPC17_40_ETH_HASH - Enable receipt of near-perfect match frames.
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CONFIG_LPC17_40_MULTICAST - Enable receipt of multicast (and unicast) frames.
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Automatically set if CONFIG_NET_MCASTGROUP is selected.
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LPC17xx/LPC40xx USB Device Configuration
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CONFIG_LPC17_40_USBDEV_FRAME_INTERRUPT
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Handle USB Start-Of-Frame events.
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Enable reading SOF from interrupt handler vs. simply reading on demand.
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Probably a bad idea... Unless there is some issue with sampling the SOF
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from hardware asynchronously.
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CONFIG_LPC17_40_USBDEV_EPFAST_INTERRUPT
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Enable high priority interrupts. I have no idea why you might want to
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do that
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CONFIG_LPC17_40_USBDEV_NDMADESCRIPTORS
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Number of DMA descriptors to allocate in SRAM.
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CONFIG_LPC17_40_USBDEV_DMA
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Enable lpc17xx/lpc40xx-specific DMA support
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CONFIG_LPC17_40_USBDEV_NOVBUS
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Define if the hardware implementation does not support the VBUS signal
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CONFIG_LPC17_40_USBDEV_NOLED
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Define if the hardware implementation does not support the LED output
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LPC17xx/LPC40xx USB Host Configuration
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CONFIG_LPC17_40_OHCIRAM_SIZE
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Total size of OHCI RAM (in AHB SRAM Bank 1)
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CONFIG_LP17_USBHOST_NEDS
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Number of endpoint descriptors
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CONFIG_LP17_USBHOST_NTDS
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Number of transfer descriptors
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CONFIG_LPC17_40_USBHOST_TDBUFFERS
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Number of transfer descriptor buffers
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CONFIG_LPC17_40_USBHOST_TDBUFSIZE
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Size of one transfer descriptor buffer
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CONFIG_LPC17_40_USBHOST_IOBUFSIZE
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Size of one end-user I/O buffer. This can be zero if the
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application can guarantee that all end-user I/O buffers
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reside in AHB SRAM.
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USB Host Configuration
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^^^^^^^^^^^^^^^^^^^^^^
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The mbed board can be easily modified to support a USB host interface
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(Remember to add 2 resistors of 15K to D+ and D- pins).
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The NuttShell (NSH) mbed can also be modified in order to support USB
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host operations. To make these modifications, do the following:
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1. First configure to build the NSH configuration from the top-level
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NuttX directory:
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./configure mbed/nsh
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2. Then edit the top-level .config file to enable USB host. Make the
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following changes using 'make menuconfig':
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System Type -> LPC17xx/LPC40xx Peripheral Support
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CONFIG_LPC17_40_USBHOST=y : USB host controller driver support
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Device Drivers -> USB Host Driver Support
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CONFIG_USBHOST=y : USB host support
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CONFIG_USBHOST_ISOC_DISABLE=y : Not needed
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CONFIG_USBHOST_MSC=y : Mass storage class support
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Library Routines
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CONFIG_SCHED_WORKQUEUE=y : Enable worker thread
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When this change is made, NSH should be extended to support USB flash
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devices. When a FLASH device is inserted, you should see a device
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appear in the /dev (pseudo) directory. The device name should be
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like /dev/sda, /dev/sdb, etc. The USB mass storage device, is present
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it can be mounted from the NSH command line like:
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ls /dev
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mount -t vfat /dev/sda /mnt/flash
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Files on the connect USB flash device should then be accessible under
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the mountpoint /mnt/flash.
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Configurations
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^^^^^^^^^^^^^^
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General
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-------
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Each mbed configuration is maintained in a sub-directory and can be selected
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as follow:
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tools/configure.sh mbed/<subdir>
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Where <subdir> is one of the mbed subdirectories described in the
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following paragraph.
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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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Configuration Sub-directories
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-----------------------------
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nsh:
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Configures the NuttShell (nsh) located at examples/nsh. The
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Configuration enables only the serial NSH interfaces. See notes
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above for enabling USB host support in this configuration.
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