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nuttx/configs/pic32mx7mmb/README.txt
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configs/pic32mx7mmb README
===============================
This README file discusses the port of NuttX to the Mikroelektronika PIC32MX7
Multimedia Board (MMB). See http://www.mikroe.com/ for further information.
Contents
========
PIC32MX795F512L Pin Out
Toolchains
Creating Compatible NuttX HEX files
Serial Console
LEDs
PIC32MX Configuration Options
Configurations
PIC32MX795F512L Pin Out
=======================
LEFT SIDE, TOP-TO-BOTTOM (if pin 1 is in upper left)
--- ---------------------------------- -------------------------- -----------------------------------------------
PIN CONFIGURATIONS SIGNAL NAME ON-BOARD CONNECTIONS
(Family Data Sheet Table 1-1) (PIC32MX7 Schematic)
--- ---------------------------------- -------------------------- -----------------------------------------------
1 RG15/AERXERR AERXERR LAN8720A RXERR
2 VDD VCC3 ---
3 PMD5/RE5 PMPD5 TFT display, HDR1 pin 13
4 PMD6/RE6 PMPD6 TFT display, HDR1 pin 12
5 PMD7/RE7 PMPD7 TFT display, HDR1 pin 11
6 RC1/T2CK LCD_RST TFT display
7 RC2/AC2TX/T3CK EE_CS# M25P80 CS
8 RC3/AC2RX/T4CK ACL_CS# ADXL345 CS and VCC
9 RC4/SDI1/T5CK SDI1 SPI1 data IN
10 PMA5/CN8/ECOL/RG6/SCK2/U3RTS/U6TX RG6 ?
11 PMA4/CN9/ECRS/RG7/SDA4/SDI2/U3RX SD_CD# SD Connector
12 PMA3/AECRSDV/AERXDV/CN10/ECRSDV/ AECRSDV LAN8720A SRS_DIV
ERXDV/RG8/SCL4/SDO2/U3TX
13 MCLR MCLR Debug connector
14 PMA2/AEREFCLK/AERXCLK/CN11/ AEREFCLK LAN8720A INT
EREFCLK/ERXCLK/RG9/SS2/U3CTS/
U6RX
15 VSS (grounded) ---
16 VDD VCC3 ---
17 RA0/TMS LED-0 LED0 (pulled up), HDR2 pin 26
18 AERXD0/INT1/RE8 AERXD0 LAN8720A RXD0
19 AERXD1/INT2/RE9 AERXD1 LAN8720A RXD1
20 AN5/C1IN+/CN7/RB5/VBUSON RB5 HDR1 pin 28
21 AN4/C1IN-/CN6/RB4 CDC_CS# ?
22 AN3/C2IN+/CN5/RB3 JOY-D Joystick D, HDR1 pin 21
23 AN2/C2IN-/CN4/RB2 JOY-C Joystick C, HDR1 pin 22
24 AN1/CN3/PGEC1/RB1 JOY-B Joystick B, HDR1 pin 23
25 AN0/CN2/PGED1/RB0 JOY-A Joystick A, HDR1 pin 24
BOTTOM SIDE, LEFT-TO-RIGHT (if pin 1 is in upper left)
--- ---------------------------------- -------------------------- -----------------------------------------------
PIN CONFIGURATIONS SIGNAL NAME ON-BOARD CONNECTIONS
(Family Data Sheet Table 1-1) (PIC32MX7 Schematic)
--- ---------------------------------- -------------------------- -----------------------------------------------
26 AN6/OCFA/PGEC2/RB6 PGC2 Debugger interface
27 AN7/PGED2/RB7 PGD2 Debugger interface
28 PMA7/AERXD2/CVREF-/RA9 SD_CD# SD Connector
29 PMA6/AERXD3/CVREF+/RA10/VREF+ JOY-CP Joystick CP, HDR1 pin 25
30 AVDD VCC3 ---
31 AVSS (grounded) ---
32 AN8/C1OUT/RB8 TEMP MCP9700A VOUT
33 AN9/C2OUT/RB9 USB-PSW USB soft-connect pull-up, HDR2 pin 3
34 PMA13/AN10/RB10/CVREFOUT LCD-YD TFT display
35 PMA12/AETXERR/AN11/ERXERR/RB11 LCD-XR TFT display
36 VSS (grounded) ---
37 VDD P32_VDD ---
38 RA1/TCK LED-1 LED1 (pulled up), HDR2 pin 27
39 AC1TX/RF13/SCK4/U2RTS/U5TX SCK3A WM873ASEDS BCLK, HDR2 pin 21
40 AC1RX/RF12/SS4/U2CTS/U5RX LRC WM873ASEDS DACLRC
41 PMA11/AECRS/AN12/ERXD0/RB12 LCD-YU TFT display
42 PMA10/AECOL/AN13/ERXD1/RB13 LCD-XL TFT display
43 PMA1/AETXD3/AN14/ERXD2/PMALH/RB14 LCD-CS# TFT display, HDR2 pin 3
44 PMA0/AETXD2/AN15/CN12/ERXD3/OCFB/ PMPA0/AN15/OCFB/CN12
PMALL/RB15
45 VSS (grounded) ---
46 VDD P32_VDD ---
47 AETXD0/CN20/RD14/SS3/U1CTS/U4RX AETXD0 LAN8720A TXD0
48 AETXD1/CN21/RD15/SCK3/U1RTS/U4TX AETXD1 LAN8720A TXD1
49 PMA9/CN17/RF4/SDA5/SDI4/U2RX SDI3A WM873ASEDS ADCDAT, HDR2 pin 19
50 PMA8/CN18/RF5/SCL5/SDO4/U2TX SDO3A WM873ASEDS DACDAT, HDR2 pin 20
RIGHT SIDE, TOP-TO-BOTTOM (if pin 1 is in upper left)
--- ---------------------------------- -------------------------- -----------------------------------------------
PIN CONFIGURATIONS SIGNAL NAME ON-BOARD CONNECTIONS
(Family Data Sheet Table 1-1) (PIC32MX7 Schematic)
--- ---------------------------------- -------------------------- -----------------------------------------------
75 VSS (grounded)
74 CN0/RC14/SOSCO/T1CK SOSC0 32.768kHz Oscillator
73 CN1/RC13/SOSCI SOSC1 32.768kHz Oscillator
72 OC1/INT0/RD0/SDO1 SDO1M SPI1 data out
71 PMA14/AEMDC/EMDC/IC4/PMCS1/RD11 AEMDC LAN8720A MDC
70 PMA15/IC3/PMCS2/RD10/SCK1 SCK1M SPI1 clock
69 IC2/RD9/SS1 LED-2 LED2 (pulled up), HDR2 pin 28
68 AEMDIO/EMDIO/IC1/RD8/RTCC AEMDIO LAN8720A MDIO
67 AETXEN/INT4/RA15/SDA1 AETXN LAN8720A TXEN
66 AETXCLK/INT3/RA14/SCL1 RA14 HDR2 pin 14
65 VSS (grounded) ---
64 CLKO/OSC2/RC15 8MHz crystal
63 CLKI/OSC1/RC12 8MHz crystal
62 VDD VCC3 ---
61 RA5/TDO RA5 HDR2 pin 13
60 RA4/TDI RA4 HDR2 pin 12
59 RA3/SDA2 SDA2 I2C2 SDA, 24AA01 SDA
58 RA2/SCL2 SCL2 I2C2 SCL, 24AA01 SCL
57 D+/RG2 USBDP USB device
56 D-/RG3 USBDM USB device
55 VUSB VCC3 ---
54 VBUS USB_DET USB device
53 RF8/SCL3/SDO3/U1TX U1TX RS-232
52 RF2/SDA3/SDI3/U1RX U2RX RS-232
51 RF3/USBID USB-ID USB device
TOP SIDE, LEFT-TO-RIGHT (if pin 1 is in upper left)
--- ---------------------------------- -------------------------- -----------------------------------------------
PIN CONFIGURATIONS SIGNAL NAME ON-BOARD CONNECTIONS
(Family Data Sheet Table 1-1) (PIC32MX7 Schematic)
--- ---------------------------------- -------------------------- -----------------------------------------------
100 PMD4/RE4 PMPD4 TFT display, HDR1 pin 14
99 PMD3/RE3 PMPD3 TFT display, HDR1 pin 15
98 PMD2/RE2 PMPD2 TFT display, HDR1 pin 16
97 RG13/TRD0 TRD0 HDR2 pin 7
96 RG12/TRD1 TRD1 HDR2 pin 8
95 RG14/TRD2 TRD2 HDR2 pin 9
94 PMD1/RE1 PMPD1 TFT display, HDR1 pin 17
93 PMD0/RE0 PMPD0 TFT display, HDR1 pin 18
92 RA7/TRD3 TRD3 HDR2 pin 10
91 RA6/TRCLK TRCLK HDR2 pin 6
90 PMD8/C2RX/RG0 PMPD8 TFT display, HDR1 pin 10
89 PMD9/C2TX/ETXERR/RG1 PMPD9 TFT display, HDR1 pin 9
88 PMD10/C1TX/ETXD0/RF1 PMPD10 TFT display, HDR1 pin 8
87 PMD11/C1RX/ETXD1/RF0 PMPD11 TFT display, HDR1 pin 7
86 VDD P32_VDD ---
85 VCAP/VCORE (capacitor to ground) ---
84 PMD15/CN16/ETXCLK/RD7 PMPD15 TFT display, HDR1 pin 3
83 PMD14/CN15/ETXEN/RD6 PMPD14 TFT display, HDR1 pin 4
82 CN14/PMRD/RD5 PMPRD
81 CN13/OC5/PMWR/RD4 PMPWR
80 PMD13/CN19/ETXD3/RD13 PMPD13 TFT display, HDR1 pin 5
79 PMD12/ETXD2/IC5/RD12 PMPD12 TFT display, HDR1 pin 6
78 OC4/RD3 RD3 HDR2 pin 5
77 OC3/RD2 LCD_BLED LCD backlight LED
76 OC2/RD1 RD1 HDR2 pin 11
Toolchains
==========
I am using the free, LITE version of the PIC32MX toolchain available
for download from the microchip.com web site. I am using the Windows
version. The MicroChip toolchain is the only toolchaing currently
supported in these configurations, but it should be a simple matter to
adapt to other toolchains by modifying the Make.defs file include in
each configuration.
Toolchain Options:
CONFIG_PIC32MX_MICROCHIPW - MicroChip full toolchain for Windows
CONFIG_PIC32MX_MICROCHIPL - MicroChip full toolchain for Linux
CONFIG_PIC32MX_MICROCHIPW_LITE - MicroChip LITE toolchain for Windows
CONFIG_PIC32MX_MICROCHIPL_LITE - MicroChip LITE toolchain for Linux
Windows Native Toolchains
NOTE: There are several limitations to using a Windows based toolchain in a
Cygwin environment. The three biggest are:
1. The Windows toolchain cannot follow Cygwin paths. Path conversions are
performed automatically in the Cygwin makefiles using the 'cygpath' utility
but you might easily find some new path problems. If so, check out 'cygpath -w'
2. Windows toolchains cannot follow Cygwin symbolic links. Many symbolic links
are used in Nuttx (e.g., include/arch). The make system works around these
problems for the Windows tools by copying directories instead of linking them.
But this can also cause some confusion for you: For example, you may edit
a file in a "linked" directory and find that your changes had no effect.
That is because you are building the copy of the file in the "fake" symbolic
directory. If you use a Windows toolchain, you should get in the habit of
making like this:
make clean_context all
An alias in your .bashrc file might make that less painful.
3. Dependencies are not made when using Windows versions of the GCC. This is
because the dependencies are generated using Windows pathes which do not
work with the Cygwin make.
Support has been added for making dependencies with the windows-native toolchains.
That support can be enabled by modifying your Make.defs file as follows:
- MKDEP = $(TOPDIR)/tools/mknulldeps.sh
+ MKDEP = $(TOPDIR)/tools/mkdeps.sh --winpaths "$(TOPDIR)"
If you have problems with the dependency build (for example, if you are not
building on C:), then you may need to modify tools/mkdeps.sh
Powering the Board
==================
[To be provided]
Creating Compatible NuttX HEX files
===================================
Intel Hex Format Files:
-----------------------
When NuttX is built it will produce two files in the top-level NuttX
directory:
1) nuttx - This is an ELF file, and
2) nuttx.hex - This is an Intel Hex format file. This is controlled by
the setting CONFIG_INTELHEX_BINARY in the .config file.
The PICkit tool wants an Intel Hex format file to burn into FLASH. However,
there is a problem with the generated nutt.hex: The tool expects the nuttx.hex
file to contain physical addresses. But the nuttx.hex file generated from the
top-level make will have address in the KSEG0 and KSEG1 regions.
tools/mkpichex:
---------------
There is a simple tool in the configs/pic32mx7mmb/tools directory
that can be used to solve both issues with the nuttx.hex file. But,
first, you must build the the tools:
cd configs/pic32mx7mmb/tools
make
Now you will have an excecutable file call mkpichex (or mkpichex.exe on
Cygwin). This program will take the nutt.hex file as an input, it will
convert all of the KSEG0 and KSEG1 addresses to physical address, and
it will write the modified file, replacing the original nuttx.hex.
To use this file, you need to do the following things:
. ./setenv.sh # Source setenv.sh. Among other this, this script
# will add configs/pic32mx7mmb/tools to your
# PATH variable
make # Build nuttx and nuttx.hex
mkpichex $PWD # Convert addresses in nuttx.hex. $PWD is the path
# to the top-level build directory. It is the only
# required input to mkpichex.
Serial Console
==============
UART1 is connected to the on-board RS-232 connector
LEDs
====
The Mikroelektronika PIC32MX7 MMB has 3 user LEDs labeled LED0-2 in the
schematics:
--- ----- ---------------------------------------------------------
PIN Board Notes
--- ----- ---------------------------------------------------------
RA0 LED0 Pulled-up, low value illuminates
RA1 LED1 Pulled-up, low value illuminates
RD9 LED2 Pulled-up, low value illuminates
RA9 LED4 Not available for general use*, indicates MMC/SD activity
--- LED5 Not controllable by software, indicates power-on
* RA9 is also the SD chip select. It will illuminate whenever the SD card
is selected. If SD is not used, then LED4 could also be used as a user-
controlled LED.
If CONFIG_ARCH_LEDS is defined, then NuttX will control these LEDs as follows:
ON OFF
------------------------- ---- ---- ---- ---- ---- ----
LED0 LED1 LED2 LED0 LED1 LED2
------------------------- ---- ---- ---- ---- ---- ----
LED_STARTED 0 OFF OFF OFF --- --- ---
LED_HEAPALLOCATE 1 ON OFF N/C --- --- ---
LED_IRQSENABLED 2 OFF ON N/C --- --- ---
LED_STACKCREATED 3 ON ON N/C --- --- ---
LED_INIRQ 4 N/C N/C ON N/C N/C OFF
LED_SIGNAL 4 N/C N/C ON N/C N/C OFF
LED_ASSERTION 4 N/C N/C ON N/C N/C OFF
LED_PANIC 5 ON N/C N/C OFF N/C N/C
PIC32MX Configuration Options
=============================
General Architecture Settings:
CONFIG_ARCH - Identifies the arch/ subdirectory. This should
be set to:
CONFIG_ARCH=mips
CONFIG_ARCH_family - For use in C code:
CONFIG_ARCH_MIPS=y
CONFIG_ARCH_architecture - For use in C code:
CONFIG_ARCH_MIPS32=y
CONFIG_ARCH_CHIP - Identifies the arch/*/chip subdirectory
CONFIG_ARCH_CHIP=pic32mx
CONFIG_ARCH_CHIP_name - For use in C code to identify the exact
chip:
CONFIG_ARCH_CHIP_PIC32MX795F512L=y
CONFIG_ARCH_BOARD - Identifies the configs subdirectory and
hence, the board that supports the particular chip or SoC.
CONFIG_ARCH_BOARD=pic32mx7mmb
CONFIG_ARCH_BOARD_name - For use in C code
CONFIG_ARCH_BOARD_PIC32MX7MMB=y
CONFIG_ARCH_LOOPSPERMSEC - Must be calibrated for correct operation
of delay loops
CONFIG_ENDIAN_BIG - define if big endian (default is little
endian)
CONFIG_DRAM_SIZE - Describes the installed DRAM (CPU SRAM in this case):
CONFIG_DRAM_SIZE=(32*1024) (32Kb)
There is an additional 32Kb of SRAM in AHB SRAM banks 0 and 1.
CONFIG_DRAM_START - The start address of installed DRAM
CONFIG_DRAM_START=0x10000000
CONFIG_DRAM_END - Last address+1 of installed RAM
CONFIG_DRAM_END=(CONFIG_DRAM_START+CONFIG_DRAM_SIZE)
CONFIG_ARCH_IRQPRIO - The PIC32MXx supports interrupt prioritization
CONFIG_ARCH_IRQPRIO=y
CONFIG_ARCH_LEDS - Use LEDs to show state. Unique to boards that
have LEDs
CONFIG_ARCH_INTERRUPTSTACK - This architecture supports an interrupt
stack. If defined, this symbol is the size of the interrupt
stack in bytes. If not defined, the user task stacks will be
used during interrupt handling.
CONFIG_ARCH_STACKDUMP - Do stack dumps after assertions
CONFIG_ARCH_LEDS - Use LEDs to show state. Unique to board architecture.
CONFIG_ARCH_CALIBRATION - Enables some build in instrumentation that
cause a 100 second delay during boot-up. This 100 second delay
serves no purpose other than it allows you to calibratre
CONFIG_ARCH_LOOPSPERMSEC. You simply use a stop watch to measure
the 100 second delay then adjust CONFIG_ARCH_LOOPSPERMSEC until
the delay actually is 100 seconds.
PIC32MX Configuration
CONFIG_PIC32MX_MVEC - Select muli- vs. single-vectored interrupts
Individual subsystems can be enabled:
CONFIG_PIC32MX_WDT - Watchdog timer
CONFIG_PIC32MX_T2 - Timer 2 (Timer 1 is the system time and always enabled)
CONFIG_PIC32MX_T3 - Timer 3
CONFIG_PIC32MX_T4 - Timer 4
CONFIG_PIC32MX_T5 - Timer 5
CONFIG_PIC32MX_IC1 - Input Capture 1
CONFIG_PIC32MX_IC2 - Input Capture 2
CONFIG_PIC32MX_IC3 - Input Capture 3
CONFIG_PIC32MX_IC4 - Input Capture 4
CONFIG_PIC32MX_IC5 - Input Capture 5
CONFIG_PIC32MX_OC1 - Output Compare 1
CONFIG_PIC32MX_OC2 - Output Compare 2
CONFIG_PIC32MX_OC3 - Output Compare 3
CONFIG_PIC32MX_OC4 - Output Compare 4
CONFIG_PIC32MX_OC5 - Output Compare 5
CONFIG_PIC32MX_I2C1 - I2C 1
CONFIG_PIC32MX_I2C2 - I2C 2
CONFIG_PIC32MX_I2C3 - I2C 3
CONFIG_PIC32MX_I2C4 - I2C 4
CONFIG_PIC32MX_I2C5 - I2C 5
CONFIG_PIC32MX_SPI1 - SPI 1
CONFIG_PIC32MX_SPI2 - SPI 2
CONFIG_PIC32MX_SPI3 - SPI 3
CONFIG_PIC32MX_SPI4 - SPI 4
CONFIG_PIC32MX_UART1 - UART 1
CONFIG_PIC32MX_UART2 - UART 2
CONFIG_PIC32MX_UART3 - UART 3
CONFIG_PIC32MX_UART4 - UART 4
CONFIG_PIC32MX_UART5 - UART 5
CONFIG_PIC32MX_UART6 - UART 6
CONFIG_PIC32MX_ADC - ADC 1
CONFIG_PIC32MX_PMP - Parallel Master Port
CONFIG_PIC32MX_CM1 - Comparator 1
CONFIG_PIC32MX_CM2 - Comparator 2
CONFIG_PIC32MX_RTCC - Real-Time Clock and Calendar
CONFIG_PIC32MX_DMA - DMA
CONFIG_PIC32MX_FLASH - FLASH
CONFIG_PIC32MX_USBDEV - USB device
CONFIG_PIC32MX_USBHOST - USB host
CONFIG_PIC32MX_CAN1 - Controller area network 1
CONFIG_PIC32MX_CAN2 - Controller area network 2
CONFIG_PIC32MX_ETHERNET - Ethernet
PIC32MX Configuration Settings
DEVCFG0:
CONFIG_PIC32MX_DEBUGGER - Background Debugger Enable. Default 3 (disabled). The
value 2 enables.
CONFIG_PIC32MX_ICESEL - In-Circuit Emulator/Debugger Communication Channel Select
Default 1 (PG2)
CONFIG_PIC32MX_PROGFLASHWP - Program FLASH write protect. Default 0xff (disabled)
CONFIG_PIC32MX_BOOTFLASHWP - Default 1 (disabled)
CONFIG_PIC32MX_CODEWP - Default 1 (disabled)
DEVCFG1: (All settings determined by selections in board.h)
DEVCFG2: (All settings determined by selections in board.h)
DEVCFG3:
CONFIG_PIC32MX_USBIDO - USB USBID Selection. Default 1 if USB enabled
(USBID pin is controlled by the USB module), but 0 (GPIO) otherwise.
CONFIG_PIC32MX_VBUSIO - USB VBUSON Selection (Default 1 if USB enabled
(VBUSON pin is controlled by the USB module, but 0 (GPIO) otherwise.
CONFIG_PIC32MX_WDENABLE - Enabled watchdog on power up. Default 0 (watchdog
can be enabled later by software).
The priority of interrupts may be specified. The value ranage of
priority is 4-31. The default (16) will be used if these any of these
are undefined.
CONFIG_PIC32MX_CTPRIO - Core Timer Interrupt
CONFIG_PIC32MX_CS0PRIO - Core Software Interrupt 0
CONFIG_PIC32MX_CS1PRIO - Core Software Interrupt 1
CONFIG_PIC32MX_INT0PRIO - External Interrupt 0
CONFIG_PIC32MX_INT1PRIO - External Interrupt 1
CONFIG_PIC32MX_INT2PRIO - External Interrupt 2
CONFIG_PIC32MX_INT3PRIO - External Interrupt 3
CONFIG_PIC32MX_INT4PRIO - External Interrupt 4
CONFIG_PIC32MX_FSCMPRIO - Fail-Safe Clock Monitor
CONFIG_PIC32MX_T1PRIO - Timer 1 (System timer) priority
CONFIG_PIC32MX_T2PRIO - Timer 2 priority
CONFIG_PIC32MX_T3PRIO - Timer 3 priority
CONFIG_PIC32MX_T4PRIO - Timer 4 priority
CONFIG_PIC32MX_T5PRIO - Timer 5 priority
CONFIG_PIC32MX_IC1PRIO - Input Capture 1
CONFIG_PIC32MX_IC2PRIO - Input Capture 2
CONFIG_PIC32MX_IC3PRIO - Input Capture 3
CONFIG_PIC32MX_IC4PRIO - Input Capture 4
CONFIG_PIC32MX_IC5PRIO - Input Capture 5
CONFIG_PIC32MX_OC1PRIO - Output Compare 1
CONFIG_PIC32MX_OC2PRIO - Output Compare 2
CONFIG_PIC32MX_OC3PRIO - Output Compare 3
CONFIG_PIC32MX_OC4PRIO - Output Compare 4
CONFIG_PIC32MX_OC5PRIO - Output Compare 5
CONFIG_PIC32MX_I2C1PRIO - I2C 1
CONFIG_PIC32MX_I2C2PRIO - I2C 2
CONFIG_PIC32MX_I2C3PRIO - I2C 3
CONFIG_PIC32MX_I2C4PRIO - I2C 4
CONFIG_PIC32MX_I2C5PRIO - I2C 5
CONFIG_PIC32MX_SPI2PRIO - SPI 2
CONFIG_PIC32MX_UART1PRIO - UART 1
CONFIG_PIC32MX_UART2PRIO - UART 2
CONFIG_PIC32MX_CN - Input Change Interrupt
CONFIG_PIC32MX_ADCPRIO - ADC1 Convert Done
CONFIG_PIC32MX_PMPPRIO - Parallel Master Port
CONFIG_PIC32MX_CM1PRIO - Comparator 1
CONFIG_PIC32MX_CM2PRIO - Comparator 2
CONFIG_PIC32MX_FSCMPRIO - Fail-Safe Clock Monitor
CONFIG_PIC32MX_RTCCPRIO - Real-Time Clock and Calendar
CONFIG_PIC32MX_DMA0PRIO - DMA Channel 0
CONFIG_PIC32MX_DMA1PRIO - DMA Channel 1
CONFIG_PIC32MX_DMA2PRIO - DMA Channel 2
CONFIG_PIC32MX_DMA3PRIO - DMA Channel 3
CONFIG_PIC32MX_DMA4PRIO - DMA Channel 4
CONFIG_PIC32MX_DMA5PRIO - DMA Channel 5
CONFIG_PIC32MX_DMA6PRIO - DMA Channel 6
CONFIG_PIC32MX_DMA7PRIO - DMA Channel 7
CONFIG_PIC32MX_FCEPRIO - Flash Control Event
CONFIG_PIC32MX_USBPRIO - USB
PIC32MXx specific device driver settings. NOTE: For the Ethernet
starter kit, there is no RS-232 connector (even with the MEB). See
discussion above ("") for information about how you can configure
an external MAX2232 board to get a serial console.
CONFIG_UARTn_SERIAL_CONSOLE - selects the UARTn for the
console and ttys0 (default is the UART0).
CONFIG_UARTn_RXBUFSIZE - Characters are buffered as received.
This specific the size of the receive buffer
CONFIG_UARTn_TXBUFSIZE - Characters are buffered before
being sent. This specific the size of the transmit buffer
CONFIG_UARTn_BAUD - The configure BAUD of the UART. Must be
CONFIG_UARTn_BITS - The number of bits. Must be either 7 or 8.
CONFIG_UARTn_PARTIY - 0=no parity, 1=odd parity, 2=even parity
CONFIG_UARTn_2STOP - Two stop bits
PIC32MX specific PHY/Ethernet device driver settings
CONFIG_PHY_KS8721 - Selects the Micrel KS8721 PHY
CONFIG_PHY_DP83848C - Selects the National Semiconduction DP83848C PHY
CONFIG_PHY_LAN8720 - Selects the SMSC LAN8720 PHY
CONFIG_PHY_AUTONEG - Enable auto-negotion
CONFIG_PHY_SPEED100 - Select 100Mbit vs. 10Mbit speed.
CONFIG_PHY_FDUPLEX - Select full (vs. half) duplex
CONFIG_NET_NTXDESC - Configured number of Tx descriptors. Default: 2
CONFIG_NET_NRXDESC - Configured number of Rx descriptors. Default: 4
CONFIG_NET_PRIORITY - Ethernet interrupt priority. The is default is
the higest priority.
CONFIG_NET_WOL - Enable Wake-up on Lan (not fully implemented).
CONFIG_NET_DUMPPACKET - Dump all received and transmitted packets.
Also needs CONFIG_DEBUG.
CONFIG_NET_REGDEBUG - Enabled low level register debug. Also needs
CONFIG_DEBUG.
CONFIG_NET_HASH - Enable receipt of near-perfect match frames.
CONFIG_NET_MULTICAST - Enable receipt of multicast (and unicast) frames.
Automatically set if CONFIG_NET_IGMP is selected.
Related DEVCFG3 Configuration Settings:
CONFIG_PIC32MX_FETHIO: Ethernet I/O Pin Selection bit:
1 = Default Ethernet I/O Pins
0 = Alternate Ethernet I/O Pins
CONFIG_PIC32MX_FMIIEN: Ethernet MII Enable bit
1 = MII enabled
0 = RMII enabled
PIC32MXx USB Device Configuration
PIC32MXx USB Host Configuration (the PIC32MX does not support USB Host)
Configurations
==============
Each PIC32MX configuration is maintained in a sudirectory and can be
selected as follow:
cd tools
./configure.sh pic32mx7mmb/<subdir>
cd -
. ./setenv.sh
Where <subdir> is one of the following:
ostest:
=======
Description.
------------
This configuration directory, performs a simple OS test using
apps/examples/ostest.
Serial Output.
--------------
The OS test produces all of its test output on the serial console.
This configuration has UART1 enabled as a serial console.
nsh:
====
Description.
------------
This is the NuttShell (NSH) using the NSH startup logic at
apps/examples/nsh.
Serial Output.
--------------
The OS test produces all of its test output on the serial console.
This configuration has UART1 enabled as a serial console.
USB Configuations.
-----------------
Several USB device configurations can be enabled and included
as NSH built-in built in functions.
To use USB device, connect the starter kit to the host using a cable
with a Type-B micro-plug to the starter kit<69>s micro-A/B port J5, located
on the bottom side of the starter kit. The other end of the cable
must have a Type-A plug. Connect it to a USB host. Jumper JP2 should be
removed.
All USB device configurations require the following basic setup in
your NuttX configuration file to enable USB device support:
CONFIG_USBDEV=y : Enable basic USB device support
CONFIG_PIC32MX_USBDEV=y : Enable PIC32 USB device support
examples/usbterm - This option can be enabled by uncommenting
the following line in the appconfig file:
CONFIGURED_APPS += examples/usbterm
And by enabling one of the USB serial devices:
CONFIG_PL2303=y : Enable the Prolifics PL2303 emulation
CONFIG_CDCACM=y : or the CDC/ACM serial driver (not both)
examples/cdcacm - The examples/cdcacm program can be included as an
function by uncommenting the following line in the appconfig file:
CONFIGURED_APPS += examples/cdcacm
and defining the following in your .config file:
CONFIG_CDCACM=y : Enable the CDCACM device
examples/usbstorage - There are some hooks in the appconfig file
to enable the USB mass storage device. However, this device cannot
work until support for the SD card is also incorporated.
Networking Configuations.
-------------------------
Several Networking configurations can be enabled and included
as NSH built-in built in functions. The following additional
configuration settings are required:
CONFIG_NET=y : Enable networking support
CONFIG_PIC32MX_ETHERNET=y : Enable the PIC32 Ethernet driver
CONFIG_NSH_TELNET=y : Enable the Telnet NSH console (optional)
NOTES:
1. This logic will assume that a network is connected. During its
initialization, it will try to negotiate the link speed. If you have
no network connected when you reset the board, there will be a long
delay (maybe 30 seconds?) before anything happens. That is the timeout
before the networking finally gives up and decides that no network is
available.
2. This example can support an FTP client. In order to build in FTP client
support simply uncomment the following lines in the appconfig file (before
configuring) or in the apps/.config file (after configuring):
#CONFIGURED_APPS += netutils/ftpc
#CONFIGURED_APPS += examples/ftpc
3. This example can support an FTP server. In order to build in FTP server
support simply uncomment the following lines in the appconfig file (before
configuring) or in the apps/.config file (after configuring):
#CONFIGURED_APPS += netutils/ftpd
#CONFIGURED_APPS += examples/ftpd
And enable poll() support in the NuttX configuration file:
CONFIG_DISABLE_POLL=n
Using a RAM disk and the USB MSC device with nsh and nsh2
---------------------------------------------------------
Here is an experimental change to either examples/nsh or examples/nsh2
that will create a RAM disk and attempt to export that RAM disk as a
USB mass storage device.
1. Changes to nuttx/.config
a) Enable support for the PIC32 USB device
-CONFIG_PIC32MX_USBDEV=n
+CONFIG_PIC32MX_USBDEV=y
b) Enable NuttX USB device support
-CONFIG_USBDEV=n
+CONFIG_USBDEV=y
c) Enable the USB MSC class driver
-CONFIG_USBMSC=n
+CONFIG_USBMSC=y
d) Use a RAM disk (instead of an SD card) as the USB MSC logical unit:
-CONFIG_EXAMPLES_USBMSC_DEVPATH1="/dev/mmcsd0"
+CONFIG_EXAMPLES_USBMSC_DEVPATH1="/dev/ram0"
2. Changes to nuttx/.config.
a) Enable building of the examples/usbstorage:
-# CONFIGURED_APPS += examples/usbstorage
+ CONFIGURED_APPS += examples/usbstorage
3. When NSH first comes up, you must manually create the RAM disk
before exporting it:
a) Create a 64Kb RAM disk at /dev/ram0:
nsh> mkrd -s 512 128
b) Put a FAT file system on the RAM disk:
nsh> mkfatfs /dev/ram0
b) Now the 'msconn' command will connect to the host and
export /dev/ram0 as the USB logical unit:
nsh> msconn
NOTE: This modification should be considered experimental. IN the
little testing I have done with it, it appears functional. But the
logic has not been stressed and there could still be lurking issues.
Update. The following was added to the top-level TODO list:
Title: PIC32 USB DRIVER DOES NOT WORK WITH MASS STORAGE CLASS
Description: The PIC32 USB driver either crashes or hangs when used with
the mass storage class when trying to write files to the target
storage device. This usually works with debug on, but does not
work with debug OFF (implying some race condition?)
Here are some details of what I see in debugging:
1. The USB MSC device completes processing of a read request
and returns the read request to the driver.
2. Before the MSC device can even begin the wait for the next
driver, many packets come in at interrupt level. The MSC
device goes to sleep (on pthread_cond_wait) with all of the
read buffers ready (16 in my test case).
3. The pthread_cond_wait() does not wake up. This implies
a problem with pthread_con_wait(?). But in other cases,
the MSC device does wake up, but then immediately crashes
because its stack is bad.
4. If I force the pthread_cond_wait to wake up (by using
pthread_cond_timedwait instead), then the thread wakes
up and crashes with a bad stack.
So far, I have no clue why this is failing.
Status: Open
Priority: High
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