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README.txt |
boards/mips/pic32mx/sure-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 NOTE: I see that Sure Electronics shows both of these boards at end-of-Life (EOL). So I assume that these boards will no longer be generally available. This work should still be useful, however, for other PIC32MX4-based boards (2012-5-27). Contents ======== PIC32MX440F512H Pin Out Toolchains Loading NuttX with PICkit2 LCD1602 PIC32MX Configuration Options Configurations PIC32MX440F512H Pin Out ======================= DB_DP11215 PIC32 Storage Demo Board ----------------------------------- PIC32MX440F512H 64-Pin QFN (USB) Pin Out as used on the DB_DP11215 PIC32 Storage Demo Board. 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, SOIC) 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, SOIC) 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 DB-DP11212 PIC32 General Purpose Demo Board ------------------------------------------- PIC32MX440F512H 64-Pin QFN (USB) Pin Out as used on the DB-DP11212 PIC32 General Purpose Demo Board LEFT SIDE, TOP-TO-BOTTOM (if pin 1 is in upper left) PIN NAME SIGNAL NOTES ---- ----------------------------- -------------- ------------------------------- 1 PMD5/RE5 PMPD5 Display, JP1-12, DB5 2 PMD6/RE6 PMPD6 Display, JP1-13, DB6 3 PMD7/RE7 PMPD7 Display, JP1-14, DB7 4 SCK2/PMA5/CN8/RG6 SCK FLASH (U4) SCK* 5 SDI2/PMA4/CN9/RG7 SDI FLASH (U4) SO* 6 SDO2/PMA3/CN10/RG8 SDO FLASH (U4) SI* 7 MCLR\ PIC_MCLR Pulled high, J2-1, ICSP 8 SS2/PMA2/CN11/RG9 N/C Not connected 9 Vss Grounded 10 Vdd +3.3V --- 11 Vbuson/AN5/CN7/RB5 RB5 LCD SEG5 (F), U5-10 12 AN4/CN6/RB4 RB4 LCD SEG4 (E), U5-1 13 AN3/CN5/RB3 RB3 LCD SEG3 (D), U5-2 14 AN2/CN4/RB2 RB2 LCD SEG2 (C), U5-4 15 PGEC1/AN1/Vref-/CN3/RB1 RB1 LCD SEG1 (B), U5-7 16 PGED1/AN0/VREF+/CVREF+/PMA6/ RB0 LCD SEG0 (A), U5-11 CN2/RB0 *FLASH (U4, SOIC) 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 J2-5, ICSP 18 PGED2/AN7/RB7 PIC_PGD2 J2-4, ICSP 19 AVdd +3.3V --- 20 AVss Grounded 21 AN8/U2CTS/RB8 RB8 LCD SEG6 (G), U5-5 22 AN9/PMA7/RB9 RB9 LCD SEG7 (DP), U5-3 23 TMS/AN10/PMA13/RB10 UTIL_WP FLASH (U4) WP* 24 TDO/AN11/PMA12/RB11 UTIL_CS FLASH (U4) CS* 25 Vss Grounded 26 Vdd +3.3V --- 27 TCK/AN12/PMA11/RB12 N/C Not connected 28 TDI/AN13/PMA10/RB13 N/C Not connected 29 AN14/U2RTS/PMA1/RB14 temp_AD temp_AD 30 AN15/PMA0/CN12/RB15 PMPA0 Display, JP1-4, RS 31 SDA2/U2RX/PMA9/CN17/RF4 SDA LM75/SO, U3-1, SDA 32 SCL2/U2TX/PMA8/CN18/RF5 SCL LM75/SO, U3-2, SCL *FLASH (U4, SOIC) 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 RD0 LCD DIG1, U5-12 45 IC4/PMCS1/PMA14/RD11 PMCS1 Display, JP1-6, E 44 SCL1/PMCS2/PMA15 RD10 LCD DIG2, U5-9 43 SDA1/RD9 RD9 LCD DIG3, U5-8 42 RTCC/RD8 RD8 LCD DIG4, U5-6 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+ MCU_D+ USB connectors via PHY 36 D- MCU_D- USB connectors via PHY 35 Vusb +3.3V --- 34 Vbus +5V_DUSB 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/RD4 PMPD4 Display, JP1-11, DB4 63 PMPD3/RD3 PMPD3 Display, JP1-10, DB3 62 PMPD2/RD2 PMPD2 Display, JP1-9, DB2 61 PMPD1/RD1 PMPD1 Display, JP1-8, DB1 60 PMPD0/RE0 PMPD0 Display, JP1-7, DB0 59 RF1 Key3 SW3-1 58 RF0 Key2 SW2-1 57 ENVREG ENVREG Pulled high 56 Vcap/Vddcore VDDCORE Capacitors to ground 55 CN16/RD7 N/C Not connected 54 CN15/RD6 Key5 SW5-1 53 PMRD/CN14/RD5 PMPRD --- 52 OC5/PMWR/CN13/RD4 PWM2 Used to control backlight level (Vo) 51 U1TX/OC4/RD3 N/C Not connected 50 U1RX/OC3/RD2 N/C Not connected 49 OC2/RD1 PWM1 Used to control backlight level (K) Toolchains ========== MPLAB/C32 --------- 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 toolchain 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. C32 Toolchain Options: CONFIG_MIPS32_TOOLCHAIN_MICROCHIPW - MicroChip full toolchain for Windows CONFIG_MIPS32_TOOLCHAIN_MICROCHIPL - MicroChip full toolchain for Linux CONFIG_MIPS32_TOOLCHAIN_MICROCHIPW_LITE - MicroChip "Lite" toolchain for Windows CONFIG_MIPS32_TOOLCHAIN_MICROCHIPL_LITE - MicroChip "Lite" toolchain for Linux CONFIG_MIPS32_TOOLCHAIN_PINGUINOL - Pinquino toolchain for Linux CONFIG_MIPS32_TOOLCHAIN_PINGUINOW - Pinquino toolchain for Windows CONFIG_MIPS32_TOOLCHAIN_MICROCHIPOPENL - Microchip open toolchain for Linux CONFIG_MIPS32_TOOLCHAIN_GNU_ELF - General mips-elf toolchain for Linux NOTE: The "Lite" versions of the toolchain does not support C++. Also certain optimization levels are not supported by the "Lite" toolchain. MicrochipOpen ------------- An alternative, build-it-yourself toolchain is available here: http://sourceforge.net/projects/microchipopen/ . These tools were last updated circa 2010. NOTE: C++ support still not available in this toolchain. Building MicrochipOpen (on Linux) 1) Get the build script from this location: http://microchipopen.svn.sourceforge.net/viewvc/microchipopen/ccompiler4pic32/buildscripts/trunk/ 2) Build the code using the build script, for example: ./build.sh -b v105_freeze This will check out the selected branch and build the tools. 3) Binaries will then be available in a subdirectory with a name something like pic32-v105-freeze-20120622/install-image/bin (depending on the current data and the branch that you selected. Note that the tools will have the prefix, mypic32- so, for example, the compiler will be called mypic32-gcc. Penguino mips-elf Toolchain --------------------------- Another option is the mips-elf toolchain used with the Penguino project. This is a relatively current mips-elf GCC and should provide free C++ support as well. This toolchain can be downloaded from the Penguino website: http://wiki.pinguino.cc/index.php/Main_Page#Download . See also boards/mirtoo/README.txt. There is an experimental (untested) configuration for the Mirtoo platform in that directory. MPLAB/C32 vs MPLABX/X32 ----------------------- It appears that Microchip is phasing out the MPLAB/C32 toolchain and replacing it with MPLABX and XC32. At present, the XC32 toolchain is *not* compatible with the NuttX build scripts. Here are some of the issues that I see when trying to build with XC32: 1) Make.def changes: You have to change the tool prefix: CROSSDEV=xc32- 2) debug.ld/release.ld: The like expect some things that are not present in the current linker scripts (or are expected with different names). Here are some partial fixes: Rename: kseg0_progmem to kseg0_program_mem Rename: kseg1_datamem to kseg1_data_mem Even then, there are more warnings from the linker and some undefined symbols for non-NuttX code that resides in the unused Microchip libraries. You will have to solve at least this undefined symbol problem if you want to used the XC32 toolchain. 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. 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/pic32/mkpichex: ---------------------- There is a simple tool in the NuttX tools/pic32 directory that can be used to solve both issues with the nuttx.hex file. But, first, you must build the tool: cd tools/pic32 make -f Makefile.host Now you will have an executable 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: export PATH = ??? # Add the NuttX tools/pic32 directory 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. This procedure is automatically performed at the end of a build. LCD1602 ======= The on-board LCD is a 2x16 segment LCD and appears to be compatible with the LCD1602 and is treated like an LCD1602 LCD here. LCD pin mapping --------------------- ---------- ---------------------------------- PIC32 Sure JP1 Sure Signal Description PIN SIGNAL NAME PIN NAME(s) --------------------- ---------- ---------------------------------- 34 Vbus 1. +5V +5V VBUS device mode To GND via capacitor 2. GND GND 49 RD1 3. Vo Transistor circuit driven by PWM2 44 PMA0/AN15/RB15 4. RS PMA0, Selects registers 53 PMRD/RD5 5. RW PMRD/PMWR, Selects read or write 45 PMPCS1/RD11 6. E Starts data read/write 60 PMD0/RE0 7. DB0 PMD0 61 PMD1/RE1 8. DB1 PMD1 62 PMD2/RE2 9. DB2 PMD2 63 PMD3/RE3 10. DB3 PMD3 64 PMD4/RE4 11. DB4 PMD4 1 PMD5/RE5 12. DB5 PMD5 2 PMD6/RE6 13. DB6 PMD6 3 PMD7/RE7 14. DB7 PMD7 15. A +5V_DUSB 46 INT0/RD0 16. K Transistor circuit driven by PWM1 --------------------- ---------- ---------------------------------- Vbus power also requires Vbuson/AN5/RB5 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 boards/ 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_RAM_SIZE - Describes the installed DRAM (CPU SRAM in this case): CONFIG_RAM_SIZE=(32*1024) (32Kb) There is an additional 32Kb of SRAM in AHB SRAM banks 0 and 1. CONFIG_RAM_START - The start address of installed DRAM CONFIG_RAM_START=0xa0000000 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. 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 sub-directory and can be selected as follow: tools/configure.sh sure-pic32mx:<subdir> Where <subdir> is one of the following sub-directories. NOTE: These configurations use the mconf-based configuration tool. To change any of these configurations using that tool, you should: a. Build and install the kconfig-mconf tool. See nuttx/README.txt see additional README.txt files in the NuttX tools repository. b. Execute 'make menuconfig' in nuttx/ in order to start the reconfiguration process. Configuration sub-directories ----------------------------- Where <subdir> is one of the following: nsh: ==== Description. ------------ Configures the NuttShell (nsh) located at apps/examples/nsh. The Configuration enables only the serial NSH interface. Notes. ----- 1. By default, this configuration uses an older Microchip C32 toolchain for Windows (the newer ones seem to be incompatible) and builds under Cygwin (or probably MSYS). That can easily be reconfigured, of course. Build Setup: CONFIG_HOST_WINDOWS=y : Builds under Windows CONFIG_WINDOWS_CYGWIN=y : Using Cygwin System Type: CONFIG_MIPS32_TOOLCHAIN_MICROCHIPW_LITE=y : Older C32 toolchain 2. USB Configurations. Several USB device configurations can be enabled and included as NSH built-in built in functions. All require the following basic setup in your .config to enable USB device support: Drivers: CONFIG_USBDEV=y : Enable basic USB device support System Type -> PIC32MX Peripheral Support: CONFIG_PIC32MX_USBDEV=y : Enable PIC32 USB device support system/cdcacm - The system/cdcacm program can be included as an function by dding the following to the NuttX configuration file: Application Configuration->Examples: CONFIG_SYSTEM_CDCACM=y : Select apps/system/cdcacm and defining the following in your .config file: Drivers->USB Device Driver Support CONFIG_CDCACM=y : Enable the CDCACM device system/usbmsc - To enable the USB mass storage class (MSC)device, you would need to add the following to the NuttX configuration file. However, this device cannot work until support for the SD card is also incorporated. Drivers->USB Device Driver Support CONFIG_USBMSC=y : Enables the USB MSC class Application Configuration->Examples: CONFIG_SYSTEM_USBMSC=y : Enhables apps/system/usbmsc 3. SD Card Support. Support for the on-board, SPI-based SD card is available but is not yet functional (at least at the time of this writing). SD card support can be enabled for testing by simply enabling SPI2 support in the configuration file: System Type -> PIC32MX Peripheral Support: CONFIG_PIC32MX_SPI2=y : Enable SPI2 Drivers: CONFIG_MMCSD=y : MMC/SD support CONFIG_MMCSD_SPI=y : SPI-based MMC/SD support File Systems: CONFIG_FS_FAT=y : FAT file system : Other FAT options Debug output for testing the SD card can be enabled using: Build Setup: CONFIG_DEBUG_FEATURES=y : Enable debug features CONFIG_DEBUG_INFO=y : Enable verbose debug output CONFIG_DEBUG_FS=y : Enable file system debug CONFIG_DEBUG_SPI=y : Enable SPI debug 4. To enable LCD1602 support: Device Drivers ->LCD Driver Support: CONFIG_LCD=y : Enable LCD menus CONFIG_LCD_LCD1602=y : Select LCD1602 CONFIG_LCD_MAXCONTRAST=255 : (Or any large-ish value that you prefer) CONFIG_LCD_MAXPOWER=255 : (Or any large-ish value that you prefer) Library Routines: CONFIG_LIBC_SLCDCODEC=y : Enable the SLCD CODEC NOTE that is is not necessary to select the PMP peripheral; this LCD driver is a bit-bang driver that just happens to use the PMP pins as GPIOS. To enable apps/examples/slcd to test the LCD: Application Configuration -> NSH Library: CONFIG_NSH_ARCHINIT=y : Needed to initialize the SLCD Application Configuration -> Examples: CONFIG_EXAMPLES_SLCD=y : Enable apps/examples/slcd use /dev/lcd1602 CONFIG_EXAMPLES_SLCD_DEVNAME="/dev/lcd1602" To enable LCD debug output: Build Setup -> Debug Options: CONFIG_DEBUG_FEATURES=y : Enable debug features CONFIG_DEBUG_INFO=y : Enable verbose debug output CONFIG_DEBUG_LCD=y : Enable LCD debug output NOTES: 2013-05-27: The LCD1602 has been verified on the DB-DP11212 using this configuration. It has not been used with the usbnsh configuration or with the DB-11112 board. It looks to me like the connection to the LCD1602 is identical on the DB-11112 and so I would expect that to work. At this point in time, testing of the SLCD is very limited because there is not much in apps/examples/slcd. Basically driver with a working test setup and ready to be tested and debugged. usbnsh: ======= Description. ------------ This is another NSH example. If differs from the 'nsh' configuration above in that this configurations uses a USB serial device for console I/O. This configuration was created to support the "DB-DP11212 PIC32 General Purpose Demo Board" which has no easily accessible serial port. However, as of this writing, the configuration has set for the "DB_DP11215 PIC32 Storage Demo Board" and has only be testing on that board. Notes. ----- 1. By default, this configuration uses an older Microchip C32 toolchain for Windows (the newer ones seem to be incompatible) and builds under Cygwin (or probably MSYS). That can easily be reconfigured, of course. Build Setup: CONFIG_HOST_WINDOWS=y : Builds under Windows CONFIG_WINDOWS_CYGWIN=y : Using Cygwin System Type: CONFIG_MIPS32_TOOLCHAIN_MICROCHIPW_LITE=y : Older C32 toolchain 2. Comparison to nsh Below summarizes the key configuration differences between the 'nsh' and the 'upnsh' configurations: CONFIG_USBDEV=y : NuttX USB device support is enabled CONFIG_PIC32MX_USBDEV=y : The PIC32MX USB device driver is built CONFIG_DEV_CONSOLE=n : /dev/console does not exist on power up CONFIG_UART1_SERIAL_CONSOLE=n : There is no serial console CONFIG_UART2_SERIAL_CONSOLE=n : CONFIG_CDCACM=y : The CDC/ACM serial device class is enabled CONFIG_CDCACM_CONSOLE=y : The CDC/ACM serial device is the console 3. Using the Prolifics PL2303 Emulation You could also use the non-standard PL2303 serial device instead of the standard CDC/ACM serial device by changing: Drivers->USB Device Driver Support CONFIG_CDCACM=n : Disable the CDC/ACM serial device class CONFIG_CDCACM_CONSOLE=n : The CDC/ACM serial device is NOT the console CONFIG_PL2303=y : The Prolifics PL2303 emulation is enabled CONFIG_PL2303_CONSOLE=y : The PL2303 serial device is the console Why would you want to use a non-standard USB serial driver? You might to use the PL2303 driver with a Windows host because it should automatically install the PL2303 driver (you might have to go through some effort to get Windows to recognize the CDC/ACM device). 4. Since this configuration is current set for the "DB_DP11215 PIC32 Storage Demo Board," UART2 is available and is configured to used as the SYSLOG device. That means that all debug output will be directed out UART2. Debug output is not enabled by default, however, so these settings do nothing until you enable debug output. Device Drivers -> System Logging Device Options: CONFIG_SYSLOG_CHAR=y CONFIG_SYSLOG_DEVPATH="/dev/ttyS0" System Type -> PIC32MX Peripheral Support: CONFIG_PIC32MX_UART2=y : Enable UART2 Device Drivers -> Serial Driver Support: CONFIG_UART2_2STOP=0 : UART2 configuration CONFIG_UART2_BAUD=115200 CONFIG_UART2_BITS=8 CONFIG_UART2_PARITY=0 CONFIG_UART2_RXBUFSIZE=64 CONFIG_UART2_TXBUFSIZE=64 NOTE: Using the SYSLOG to get debug output has limitations. Among those are that you cannot get debug output from interrupt handlers. So, in particularly, debug output is not a useful way to debug the USB device controller driver. Instead, use the USB monitor with USB debug off and USB trance on (see below). 5. Enabling USB monitor SYSLOG output. If tracing is enabled, the USB device will save encoded trace output in in-memory buffer; if the USB monitor is enabled, that trace buffer will be periodically emptied and dumped to the system logging device (UART2 in this configuration): Device Drivers -> "USB Device Driver Support: CONFIG_USBDEV_TRACE=y : Enable USB trace feature CONFIG_USBDEV_TRACE_NRECORDS=256 : Buffer 256 records in memory Application Configuration -> NSH LIbrary: CONFIG_NSH_USBDEV_TRACE=n : No builtin tracing from NSH CONFIG_NSH_ARCHINIT=y : Automatically start the USB monitor Application Configuration -> System NSH Add-Ons: CONFIG_USBMONITOR=y : Enable the USB monitor daemon CONFIG_USBMONITOR_STACKSIZE=2048 : USB monitor daemon stack size CONFIG_USBMONITOR_PRIORITY=50 : USB monitor daemon priority CONFIG_USBMONITOR_INTERVAL=1 : Dump trace data every second CONFIG_USBMONITOR_TRACEINIT=y : Enable TRACE output CONFIG_USBMONITOR_TRACECLASS=y CONFIG_USBMONITOR_TRACETRANSFERS=y CONFIG_USBMONITOR_TRACECONTROLLER=y CONFIG_USBMONITOR_TRACEINTERRUPTS=y NOTE: USB debug output also be enabled in this case. Both will appear on the serial SYSLOG output. However, the debug output will be asynchronous with the trace output and, hence, difficult to interpret. 6. If you want to try this configuration on the DB-DP11212 PIC32 General Purpose Demo Board", here are the changes that you should make: Board Configuration: CONFIG_ARCH_DBDP11215=n : Disable the DB-DP11215 CONFIG_ARCH_DBDP11212=y : Enable the DB-DP11212 CONFIG_ARCH_LEDS=n : The DB-DP11212 has no LEDs System Type -> PIC32MX Peripheral Support: CONFIG_PIC32MX_UART2=n : Disable UART2 The SYSLOG output on UART2 cannot by used. You have two choices, first, you can simply disable the SYSLOG device. Then 1) debug output will come the USB console, and 2) all debug output prior to connecting the USB console will be lost: The second options is to configure a RAM SYSLOG device. This is a circular buffer that accumulated debug output in memory. The contents of the circular buffer can be dumped from the NSH command line using the 'dmesg' command. Device Drivers -> System Logging Device Options: CONFIG_RAMLOG=y : Enable the RAM-based logging feature. CONFIG_RAMLOG_SYSLOG=y : This enables the RAM-based logger as the system logger. Logging is currently can be set up to use any amount of memory (here 8KB): CONFIG_RAMLOG_BUFSIZE=8192 STATUS: 2013-7-4: This configuration was last verified. 7. See the notes for the nsh configuration. Most also apply to the usbnsh configuration as well.