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README.txt
configs/pic32mx README
=====================
This README file discusses the port of NuttX to the "Advanced USB Storage
Demo Board," Model DB-DP11215, from Sure Electronics
(http://www.sureelectronics.net/). This board features the MicroChip
PIC32MX440F512H. See also http://www.sureelectronics.net/goods.php?id=1168
for further information about the Sure DB-DP11215 board.
DB_DP11215 PIC32 Storage Demo Board
- PIC32MX44F512H
- SD card slot
- RS-2323 Interface
- USB (MINI-B)
- 2x16 LCD display
- Three tactile switches
- Four user LEDs
Also available (but not yet supported).
DB-DP11212 PIC32 General Purpose Demo Board
- PIC32MX44F512H
- LM75A temperature sensor and temperature resistor (NTC-SMD thermistor)
- SPI FLASH: AT25DF041A
- USB (MINI-B)
- 2x16 LCD display
- 4 digit, 8 segment LED display
- Three tactile switches
- Four user LEDs
Contents
========
PIC32MX440F512H Pin Out
Toolchains
Loading NuttX with PICkit2
PIC32MX Configuration Options
Configurations
PIC32MX440F512H Pin Out
=======================
PIC32MX440F512H 64-Pin QFN (USB) Pin Out.
LEFT SIDE, TOP-TO-BOTTOM (if pin 1 is in upper left)
PIN NAME SIGNAL NOTES
---- ----------------------------- -------------- -------------------------------
1 PMD5/RE5 PMPD5 Display, JP1-12, DB4
2 PMD6/RE6 PMPD6 Display, JP1-13, DB6
3 PMD7/RE7 PMPD7 Display, JP1-14, DB7
4 SCK2/PMA5/CN8/RG6 SCK SD connector SCK, FLASH (U1) SCK*
5 SDI2/PMA4/CN9/RG7 SDI SD connector DO, FLASH (U1) SO*
6 SDO2/PMA3/CN10/RG8 SDO SD connector DI, FLASH (U1) SI*
7 MCLR\ PIC_MCLR Pulled high, J7-1, ICSP
8 SS2/PMA2/CN11/RG9 UTIL_CS FLASH (U1) CS*
9 Vss Grounded
10 Vdd +3.3V ---
11 AN5/C1IN+/Vbuson/CN7/RB5 Vbuson/AN5/RB5 To USB VBUS circuitry
12 AN4/C1IN-/CN6/RB4 SW_OK SW3, Pull high, low means SW3 closed
13 AN3/C2IN+/CN5/RB3 SW_UP SW1, Pull high, low means SW1 closed
14 AN2/C2IN-/CN4/RB2 SW_Down SW2, Pull high, low means SW2 closed
15 PGEC1/AN1/Vref-/CVref-/CN3/ ADC_SENSE_SWITCHED_+VBUS To USB VBUS circuitry
RB1
16 PGED1/AN0/VREF+/CVREF+/PMA6/ N/C Not connected
CN2/RB0
*FLASH (U1, SOIOC) not populated
BOTTOM SIDE, LEFT-TO-RIGHT (if pin 1 is in upper left)
PIN NAME SIGNAL NOTES
---- ----------------------------- -------------- -------------------------------
17 PGEC2/AN6/OCFA/RB6 PIC_PGC2 J7-5, ICSP
18 PGED2/AN7/RB7 PIC_PGD2 J7-4, ICSP
19 AVdd +3.3V ---
20 AVss Grounded
21 AN8/U2CTS/C1OUT/RB8 N/C Not connected
22 AN9/C2OUT/PMA7/RB9 N/C Not connected
23 TMS/AN10/CVREFOUT/PMA13/RB10 UTIL_WP FLASH (U1) WP*
24 TDO/AN11/PMA12//RB11 SD_CS SD connector CS
25 Vss Grounded
26 Vdd +3.3V ---
27 TCK/AN12/PMA11/RB12 SD_CD SD connector CD
28 TDI/AN13/PMA10/RB13 SD_WD SD connector WD
29 AN14/U2RTS/PMALH/PMA1/RB14 N/C Not connected
30 AN15/OCFB/PMALL/PMA0/CN12/ PMPA0 Display, JP1-4, RS
RB15
31 SDA2/U2RX/PMA9/CN17/RF4 RXD2_MCU J5 DB9 via RS232 driver
32 SCL2/U2TX/PMA8/CN18/RF5 TXD2_MCU J5 DB9 via RS232 driver
*FLASH (U1, SOIOC) not populated
RIGHT SIDE, TOP-TO-BOTTOM (if pin 1 is in upper left)
PIN NAME SIGNAL NOTES
---- ----------------------------- -------------- -------------------------------
48 SOSCO/T1CK/CN0/RC14 SOSCO 32.768KHz XTAL (Y1)
47 SOSCI/CN1/RC13 SOSCI 32.768KHz XTAL (Y1)
46 OC1/INT0/RD0 PWM1 Used to control backlight level (K)
45 IC4/PMCS1/PMA14/INT4/RD11 PMPCS1 Display, JP1-6, E
44 SCL1/IC3/PMCS2/PMA15/INT3/ USB_OPT USB PHY
RD10
43 U1CTS/SDA1/IC2/INT2/RD9 USB_OPTEN USB PHY
42 RTCC/IC1/INT1/RD8 N/C Not connected
41 Vss Grounded
40 OSC2/CLKO/RC15 OSC2 20MHz XTAL (Y2)
39 OSC1/CLKI/RC12 OSC1 20MHz XTAL (Y2)
38 Vdd +3.3V ---
37 D+/RG2 APPS_D+ USB connectors via PHY
36 D-/RG3 APPS_D- USB connectors via PHY
35 Vusb +3.3V ---
34 Vbus VBUS_DEVICE_MODE Display, USB Mini-B, USB Type A, JP1-1, +5V
33 USBID/RF3 N/C Not connected
TOP SIDE, LEFT-TO-RIGHT (if pin 1 is in upper left)
PIN NAME SIGNAL NOTES
---- ----------------------------- -------------- -------------------------------
64 PMPD4/RE4 PMPD4 Display, JP1-11, DB4
63 PMPD3/RE3 PMPD3 Display, JP1-10, DB3
62 PMPD2/RE2 PMPD2 Display, JP1-9, DB2
61 PMPD1/RE1 PMPD1 Display, JP1-8, DB1
60 PMPD0/RE0 PMPD0 Display, JP1-7, DB0
59 RF1 RF1 Low illuminates LED/R/ERR
58 RF0 RF0 Low illuminates LED/Y/flash
57 ENVREG ENVREG Pulled high
56 Vcap/Vddcore VDDCORE Capactors to ground
55 CN16/RD7 RD7 Low illuminates LED/Y/USB
54 CN15/RD6 RD6 Low illuminates LED/Y/SD
53 PMRD/CN14/RD5 PMPRD Display, JP1-5, R/W
52 OC5/IC5/PMWR/CN13/RD4 N/C Not connected
51 U1TX/OC4/RD3 CP2102_RXD J6-3, UART1 (also CP2102*)
50 U1RX/OC3/RD2 CP2102_TXD J6-2, UART1 (also CP2102*)
49 U1RTS/OC2/RD1 PWM2 Used to control backlight level (Vo)
*USB-to-UART bridge (U1, CP2102) not populated
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
Loading NuttX with PICkit2
==========================
NOTE: You need a PICKit3 if you plan to use the MPLAB debugger! The PICKit2
can, however, still be used to load programs. Instructions for the PICKit3
are similar.
Intel Hex Forma 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/sure-pic32mx/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/sure-pic32mx/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/sure-pic32mx/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.
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_PIC32MX440F512H=y
CONFIG_ARCH_BOARD - Identifies the configs subdirectory and
hence, the board that supports the particular chip or SoC.
CONFIG_ARCH_BOARD=sure-pic32mx
CONFIG_ARCH_DBDP11215 Distinguishes the DB_DP11215 PIC32 Storage
Demo Board
CONFIG_ARCH_DBDP11212 Distingustes the DB-DP11212 PIC32 General
Purpose Demo Board
CONFIG_ARCH_BOARD_name - For use in C code
CONFIG_ARCH_BOARD_SUREPIC32MX=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_SPI2 - SPI 2
CONFIG_PIC32MX_UART1 - UART 1
CONFIG_PIC32MX_UART2 - UART 2
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
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_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_FCEPRIO - Flash Control Event
CONFIG_PIC32MX_USBPRIO - USB
PIC32MXx specific device driver settings. NOTE: For the Sure board,
UART2 is brought out to the DB9 connector and serves as the 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
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 sure-pic32mx/<subdir>
cd -
. ./setenv.sh
Where <subdir> is one of the following:
ostest:
This configuration directory, performs a simple OS test using
apps/examples/ostest.
nsh:
Configures the NuttShell (nsh) located at apps/examples/nsh. The
Configuration enables only the serial NSH interface.
The examples/usbterm program can be included as an NSH built-in
function by defined the following in your .config file:
CONFIG_USBEV=y : Enable basic USB device support
CONFIG_PIC32MX_USBDEV=y : Enable PIC32 USB device support