| .. _cc2650_sensortag: |
| |
| CC2650 SensorTag |
| ################ |
| |
| Overview |
| ******** |
| |
| The SimpleLink CC2650 SensorTag is a Texas Instruments board based |
| on the CC2650 wireless MCU. It contains multiple sensors and provides |
| Bluetooth and IEEE 802.15.4 connectivity. |
| |
| .. image:: img/sensortag.jpg |
| :width: 600px |
| :height: 600px |
| :align: center |
| :alt: TI SensorTag v2 |
| |
| Features |
| ======== |
| |
| * CC2650 low-power wireless MCU: Bluetooth + IEEE 802.15.4 connectivity |
| * Autonomous low-power sensor controller |
| * Autonomous radio controller |
| * Program, debug, and serial line through "DevPack" JTAG probe's USB port |
| * Power from DevPack USB or batteries |
| * 2 buttons and 2 LEDs for user interaction |
| |
| Hardware |
| ******** |
| |
| The SensorTag board provides the following hardware: |
| |
| * CC2650 SoC in RGZ (7x7mm) 48 pins format package |
| * Programmable Cortex-M3 CPU, clocked at 48MHz |
| * Proprietary sensor controller |
| * 12-bit ADC, 200ks/s |
| * 2 comparators |
| * SPI + I2C digital interfaces for sensors |
| * Programmable with register-based interface |
| * Cortex-M0 "RF Core" radio controller |
| * 4KB of dedicated SRAM |
| * Single transceiver, with modem and frequency synthesizer |
| * Programmable with register-based interface |
| * 128KB flash |
| * 20KB SRAM |
| * 8KB cache |
| * SPI |
| * I2C |
| * I2S |
| * UART |
| * 31 GPIOs |
| * 4 32-bit timers |
| * True Random Number Generator |
| * Real Time Clock |
| * Watchdog timer |
| * 32 channels DMA controller |
| * 10 sensors: ambient light, digital microphone, magnetic sensor, humidity, |
| pressure, accelerometer, gyroscope, magnetometer, object temperature and |
| ambient temperature |
| |
| Supported features |
| ================== |
| |
| The following SensorTag features are currently supported: |
| |
| +-----------+------------+------------------------------------+ |
| | Interface | Controller | Driver/Component | |
| +===========+============+====================================+ |
| | NVIC | on-chip | Nested Vector Interrupt Controller | |
| +-----------+------------+------------------------------------+ |
| | UART | on-chip | serial port polling | |
| +-----------+------------+------------------------------------+ |
| | GPIO | on-chip | gpio | |
| +-----------+------------+------------------------------------+ |
| | PINMUX | on-chip | pinmux | |
| +-----------+------------+------------------------------------+ |
| |
| Connections and IOs |
| =================== |
| |
| The SensorTag has one GPIO controller, along with a flexible pin |
| multiplexer. In practice, the pins are routed as described in |
| :file:`boards/arm/cc2650_sensortag/board.h`; the most commonly used being: |
| |
| +----------------+---------------+----------------------+ |
| | Physical pin # | Digital I/O # | Signal | |
| +================+===============+======================+ |
| | 5 | DIO_0 | BUTTON_2 (right) | |
| +----------------+---------------+----------------------+ |
| | 9 | DIO_4 | BUTTON_1 (left) | |
| +----------------+---------------+----------------------+ |
| | 10 | DIO_5 | SDA | |
| +----------------+---------------+----------------------+ |
| | 11 | DIO_6 | SCL | |
| +----------------+---------------+----------------------+ |
| | 16 | DIO_10 | LED_1 (red) | |
| +----------------+---------------+----------------------+ |
| | 21 | DIO_15 | LED_2 (green) | |
| +----------------+---------------+----------------------+ |
| | 27 | DIO_17 | SCLK | |
| +----------------+---------------+----------------------+ |
| | 28 | DIO_18 | MISO | |
| +----------------+---------------+----------------------+ |
| | 29 | DIO_19 | MOSI | |
| +----------------+---------------+----------------------+ |
| | 31 | DIO_21 | BUZZER | |
| +----------------+---------------+----------------------+ |
| | 41 | DIO_28 | UART_RX | |
| +----------------+---------------+----------------------+ |
| | 42 | DIO_29 | UART_TX | |
| +----------------+---------------+----------------------+ |
| |
| System Clock |
| ============ |
| |
| The CC2650 clocks its Cortex-M3 CPU through a 48MHz internal oscillator |
| by default. 2 system clocks, a high-frequency one and a low-frequency one, |
| are available to clock the CPU and the peripherals. |
| Available clock sources for them are: |
| |
| * 48MHz internal oscillator |
| * 24MHz internal oscillator |
| * 32KHz internal oscillator |
| * 32.768KHz external oscillator |
| |
| Programming and debugging |
| ************************* |
| |
| The ROM in the CC2650 contains a proprietary bootloader, executed |
| before the program stored on flash. The bootloader looks at a special |
| configuration area expected to be written at the end of flash, the |
| CCFG ("Customer Configuration" area). A 32-bit word in this area, |
| *IMAGE_VALID_CONF*, needs to be 0 in order for the bootloader to actually |
| pass control to your program. You can find more information on the CCFG |
| in the `CC2650 reference manual`_, section 9.1. The current CC2650 port |
| for Zephyr already does this by default; if you wish to check or modify |
| the CCFG content, see :file:`arch/arm/soc/ti_simplelink/cc2650/soc.c`. |
| |
| Building |
| ======== |
| |
| You can build an application in the usual way. Here is an example for |
| the :ref:`hello_world` application. |
| |
| .. zephyr-app-commands:: |
| :zephyr-app: samples/hello_world |
| :board: cc2650_sensortag |
| :goals: build flash |
| |
| Flashing |
| ======== |
| |
| The CC2650 SensorTag can be flashed using a XDS110 JTAG device, the "DevPack", |
| designed to plug on it. For now, flashing with it is not supported |
| within Zephyr. However, you can use Uniflash, a TI proprietary tool, to do |
| the job for now. |
| |
| .. note:: |
| Uniflash comes with some firmware for the "DevPeck" XDS110 JTAG probe. |
| Different versions of Uniflash may have different firmware version. |
| Currently, the most stable version is the 3.4. You should be able |
| to grab it here: |
| http://processors.wiki.ti.com/index.php/CCS_UniFlash_v3.4.1_Release_Notes |
| |
| To update the "DevPack", reach the installation path of Uniflash 3.4, |
| then to the :file:`ccs_base/common/uscif/xds110/` subdirectory. |
| Then follow the :file:`ReadMe.txt`'s instructions: |
| |
| .. code-block:: console |
| |
| $ ./xdsdfu -m |
| $ ./xdsdfu -f firmware.bin -r |
| |
| The green LED of the "DevPack" should blink repeatedly during the |
| operation, then light up again upon completion. |
| |
| Debugging |
| ========= |
| |
| Debugging can be done with OpenOCD 0.10, which is supported |
| by the Zephyr SDK since v0.9.2. A basic configuration file for the |
| SensorTag board would be: |
| |
| .. code-block:: console |
| |
| source [find interface/cmsis-dap.cfg] |
| transport select jtag |
| gdb_memory_map enable |
| gdb_flash_program enable |
| source [find target/cc26xx.cfg] |
| adapter_khz 5000 |
| |
| Copy this in a file named ``ti-sensortag.cfg``, located in the |
| :file:`scripts/board` subdirectory of your local OpenOCD installation path. |
| When you wish to launch the OpenOCD server, just type: |
| |
| .. code-block:: console |
| |
| $ openocd -f board/ti-sensortag.cfg |
| |
| References |
| ********** |
| |
| TI CC2650 datasheet: |
| http://www.ti.com/lit/ds/symlink/cc2650.pdf |
| |
| CC2650 reference manual: |
| http://www.ti.com/lit/ug/swcu117g/swcu117g.pdf |
| |
| Uniflash 3.4 release notes: |
| http://processors.wiki.ti.com/index.php/CCS_UniFlash_v3.4.1_Release_Notes |
| |
| .. _CC2650 reference manual: |
| http://www.ti.com/lit/ug/swcu117g/swcu117g.pdf |
