README
^^^^^^
README for NuttX port to the u-blox C027 dev board.
The board is intended for prototyping software for u-blox cellular modems (SARA
or LISA families) and the u-blox GPS receiver (MAX-7Q, MAX-M8Q, or other,
depending on board revision).
This board features the LPC1768 MCU and is related to the Embedded Artists' base
board with the NXP the LPCXpresso daughter board, see
configs/lpcxpresso-lpc1768/README.txt.
The board also features an embedded USB debugger.
Contents
^^^^^^^^
u-blox C027 Board
Configurations
u-blox C027 Board
^^^^^^^^^^^^^^^^^
Pin Description Connector On Board
-------------------------------- --------- --------------
P0[0]/RD1/TXD3/SDA1 D14 TXD3/SDA1
P0[1]/TD1/RXD3/SCL1 D15 RXD3/SCL1
P0[2]/TXD0/AD0[7] USBTXD
P0[3]/RXD0/AD0[6] USBRXD
P0[4]/I2SRX-CLK/RD2/CAP2.0 CANRD CAN_RX2
P0[5]/I2SRX-WS/TD2/CAP2.1 CANTD CAN_TX2
P0[6]/I2SRX_SDA/SSEL1/MAT2[0] CANS SSEL1
P0[7]/I2STX_CLK/SCK1/MAT2[1] MDMUSBDET
P0[8]/I2STX_WS/MISO1/MAT2[2] MDMLVLOE
P0[9]/I2STX_SDA/MOSI1/MAT2[3] MDMILVLOE
P0[10]/TXD2/SDA2 GPSTXD
P0[11]/RXD2/SCL2 GPSRXD
P0[15]/TXD1/SCK0/SCK MDMTXD
P0[16]/RXD1/SSEL0/SSEL MDMRXD
P0[17]/CTS1/MISO0/MISO MDMCTS
P0[18]/DCD1/MOSI0/MOSI MDMDCD
P0[19]/DSR1/SDA1 MDMDCR
P0[20]/DTR1/SCL1 MDMDTR
P0[21]/RI1/MCIPWR/RD1 MDMRI
P0[22]/RTS1/TD1 MDMRTS
P0[23]/AD0[0]/I2SRX_CLK/CAP3[0] A0 I2S_CLK
P0[24]/AD0[1]/I2SRX_WS/CAP3[1] A1 I2S_WS
P0[25]/AD0[2]/I2SRX_SDA/TXD3 A2 I2S_SDA
P0[26]/AD0[3]/AOUT/RXD3 A3 AD0.3/AOUT
P0[27]/SDA0/USB_SDA GPSSDA
P0[28]/SCL0 GPSSCL
P0[29]/USB_D+ MDMUSBDP
P0[30]/USB_D- MDMUSBDM
P1[0]/ENET_TXD0 ENET_TXD0
P1[1]/ENET_TXD1 ENET_TXD1
P1[4]/ENET_TX_EN ENET_TX_EN
P1[8]/ENET_CRS ENET_CRS
P1[9]/ENET_RXD0 ENET_RXD0
P1[10]/ENET_RXD1 ENET_RXD1
P1[14]/ENET_RX_ER ENET_RX_ER
P1[15]/ENET_REF_CLK ENET_REF_CLK
P1[16]/ENET_MDC ENET_MDC
P1[17]/ENET_MDIO ENET_MDIO
P1[18]/USB_UP_LED/PWM1[1]/CAP1[0] GPSRST
P1[19]/MC0A/USB_PPWR/N_CAP1.1 GPSPPS
P1[20]/MCFB0/PWM1.2/SCK0 D13 PWM1.2/SCK0
P1[21]/MCABORT/PWM1.3/SSEL0 D10 PWM1.3/SSEL0
P1[22]/MC0B/USB-PWRD/MAT1.0 GPSINT
P1[23]/MCFB1/PWM1.4/MISO0 D12 PWM1.4/MISO0
P1[24]/MCFB2/PWM1.5/MOSI0 D11 PWM1.5/MOSI0
P1[25]/MC1A/MAT1.1 ETH_LED_LNK
P1[26]/MC1B/PWM1.6/CAP0.0 ETH_LED_SPD
P1[27]/CLKOUT/USB-OVRCR-N/CAP0.1 ETH_OSC_EN
P1[28]/MC2A/PCAP1.0/MAT0.0 ETH_RST
P1[29]/MC2B/PCAP1.1/MAT0.1 GPSEN
P1[30]/VBUS/AD0[4] A4 AD0.4
P1[31]/SCK1/AD0[5] A5 AD0.5
P2[0]/PWM1.1/TXD1 D3 PWM1.1
P2[1]/PWM1.2/RXD1 D5 PWM1.2
P2[2]/PWM1.3/CTS1/TRACEDATA[3] D6 PWM1.3
P2[3]/PWM1.4/DCD1/TRACEDATA[2] D9 PWM1.4
P2[4]/PWM1.5/DSR1/TRACEDATA[1] D8 PWM1.5
P2[5]/PWM1[6]/DTR1/TRACEDATA[0] MDMEN
P2[6]/PCAP1[0]/RI1/TRACECLK MDMPWRON
P2[7]/RD2/RTS1 MDMGPIO1
P2[8]/TD2/TXD2 MDMRST
P2[9]/USB_CONNECT/RXD2 MDMUSBCON
P2[10]/EINT0/NMI ISP_PAD
P2[11]/EINT1/I2STX_CLK D7 EINT1
P2[12]/EINT2/I2STX_WS D4 EINT2
P2[13]/EINT3/I2STX_SDA D2 EINT3
P3[25]/MAT0.0/PWM1.2 LED
P4[28]/RX-MCLK/MAT2.0/TXD3 D0 TXD3
P4[29]/TX-MCLK/MAT2.1/RXD3 D1 RXD3
Configurations
^^^^^^^^^^^^^^
nsh
---
The nsh configuration allows to test the modem and the GPS receiver. The modem
can be tested in either the internal TCP/IP stack mode or with the NuttX TCP/IP
stack and pppd.
Modem starts in power-down mode and has to be switched on, e.g., using the nsh
command:
nsh> ubloxmodem on
To connect using the NuttX TCP/IP stack, use pppd. At the time of writing the
pppd app is located in apps/examples/pppd and requires setting correct login
details in the source code.
To connect using the internal u-blox TCP/IP stack, use the chat app. Its
configuration is done in configs/u-blox-c027/nsh/defconfig and can be adjusted
using 'make menuconfig'.
The NuttX u-blox modem driver is included like this:
CONFIG_MODEM=y
CONFIG_MODEM_U_BLOX=y
The nsh app that allows power control is included with the default configuration
as follows:
CONFIG_EXAMPLES_UBLOXMODEM=y
CONFIG_EXAMPLES_UBLOXMODEM_TTY_DEVNODE="/dev/ttyS1"
CONFIG_EXAMPLES_UBLOXMODEM_DEVNODE="/dev/ubxmdm"
The modem driver uses two device nodes. The TTY device is the modem terminal,
while the other device is used for general control via GPIO such as power
control. At the moment only one modem is supported, and the corresponding device
control node is /dev/ubxmdm.
The chat app allows to run scripts. A few such scripts are preset in the
defconfig:
CONFIG_EXAMPLES_CHAT_PRESET[0..3]:
0 - set up the provider context with username and password,
1 - connect to the provider,
2 - open a TCP socket to the u-blox test server,
3 - test the TCP socket server operation and close the socket.
