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.