This directory contains example platform drivers for the Texas Instruments CC2538.
The example platform drivers are intended to present the minimal code necessary to support OpenThread. As a result, the example platform drivers do not necessarily highlight the platform's full capabilities.
Download and install the GNU toolchain for ARM Cortex-M.
In a Bash terminal, follow these instructions to install the GNU toolchain and other dependencies.
$ cd <path-to-openthread> $ ./script/bootstrap
In a Bash terminal, follow these instructions to build the cc2538 examples.
$ cd <path-to-openthread> $ ./bootstrap $ make -f examples/Makefile-cc2538
If your board has a CC2592 range extender front-end IC connected to the CC2538 (e.g. the CC2538-CC2592 EM reference design), you need to initialise this part before reception of radio traffic will work.
Support is enabled in OpenThread by building with CC2592=1:
$ make -f examples/Makefile-cc2538 CC2592=1
The default settings should work for any design following the integration advice given in TI's application report “AN130 - Using CC2592 Front End With CC2538”.
Additional settings can be customised:
CC2592_PA_EN: This specifies which pin (on port C of the CC2538) connects to the CC2592's PA_EN pin. The default is 3 (PC3).CC2592_LNA_EN: This specifies which pin (on port C of the CC2538) connects to the CC2592's LNA_EN pin. The default is 2 (PC2).CC2592_USE_HGM: This defines whether the HGM pin of the CC2592 is under GPIO control or not. If not, it is assumed that the HGM pin is tied to a power rail.CC2592_HGM_PORT: The HGM pin can be connected to any free GPIO. TI recommend using PD2, however if you've used a pin on another GPIO port, you may specify that port (A, B or C) here.CC2592_HGM_PORT: The HGM pin can be connected to any free GPIO. TI recommend using PD2, however if you've used a pin on another GPIO port, you may specify that port (A, B or C) here. Default is D.CC2592_HGM_PIN: The HGM pin can be connected to any free GPIO. TI recommend using PD2, however if you've used a pin on another GPIO pin, you can specify the pin here. Default is 2.CC2592_HGM_DEFAULT_STATE: By default, HGM is enabled at power-on, but you may want to have it default to off, specify CC2592_HGM_DEFAULT_STATE=0 to do so.CC2538_RECEIVE_SENSITIVITY: If you have tied the HGM pin to a power rail, this allows you to calibrate the RSSI values according to the new receive sensitivity. This has no effect if CC2592_USE_HGM=1 (the default).CC2538_RSSI_OFFSET: If you have tied the HGM pin to a power rail, this allows you to calibrate the RSSI values according to the new RSSI offset. This has no effect if CC2592_USE_HGM=1 (the default).If the build completed successfully, the elf files may be found in <path-to-openthread>/output/cc2538/bin.
To flash the images with Flash Programmer 2, the files must have the *.elf extension.
$ cd <path-to-openthread>/output/cc2538/bin $ cp ot-cli ot-cli.elf
To load the images with the serial bootloader, the images must be converted to bin. This is done using arm-none-eabi-objcopy
$ cd <path-to-openthread>/output/cc2538/bin $ arm-none-eabi-objcopy -O binary ot-cli ot-cli.bin
The cc2538-bsl.py script provides a convenient method for flashing a CC2538 via the UART. To enter the bootloader backdoor for flashing, hold down SELECT for CC2538DK (corresponds to logic ‘0’) while you press the Reset button.
/dev/ttyUSB1 (serial port settings: 115200 8-N-1).help for list of commands.> help help channel childtimeout contextreusedelay extaddr extpanid ipaddr keysequence leaderweight masterkey mode netdataregister networkidtimeout networkname panid ping prefix releaserouterid rloc16 route routerupgradethreshold scan start state stop whitelist