Introduction

SysConfig is a tool that helps simplify the configuration of your application on a SimpleLink device.

The basic idea of SysConfig is to allow intuitive and natural configuration of key components in an application. The SysConfig tool will generate source code to configure these components (e.g. TI Drivers, stacks, etc.) based on the settings in the SysConfig configuration file (i.e. .syscfg). This generated code is then included in the application. For example, SysConfig will create and fill in all the 'C' structures needed by the TI Driver modules.

This lab is an introduction to SysConfig and will focus on its integration with TI Drivers modules (e.g. UART, I2C, etc.). Additional labs will be available for other key components (e.g. Networking stacks, BLE stack, etc.) but this lab is considered the starting point to understand and learn the power of SysConfig.

SysConfig is not dependent on an RTOS, compiler toolchain, or IDE. Additionally SysConfig is available

• with CCS Desktop (which this lab will focus on).
• with CCS Cloud
• as a stand-alone desktop tool
• as a cmdline tool

The tasks in this lab session are targeted to be completed within an hour time frame.

What SysConfig is not

Currently SysConfig is generally focused on generating configuration code. For example, the tool generates the configuration code for TI Drivers, but it does not generate code for the Driver init or open calls. For example, the application writer can use SysConfig to configure an I2C peripheral, but the writer must supply the calls to I2C_init, I2C_open, and I2C_transfer. Please refer to the documentation for each component in SysConfig for more information.

Here's what we'll learn

• Introduction to SysConfig
• Learn how to use SysConfig to configure TI Drivers in your application

Prerequisites

Recommended background reading

• SimpleLink SDK User Guide's SysConfig section
• SysConfig Product Page

Software for development

• Any SimpleLink SDK installed on your computer:
  • SimpleLink CC32XX SDK
  • SimpleLink MSP432 SDK
  • SimpleLink CC13XX-CC26XX SDK
• Desktop Code Composer Studio as specified in the SimpleLink SDK Release Notes

Hardware requirements

You can use this workshop with any cc13xx, CC26xx, CC32xx, MSP432E4, or MSP432P4 LaunchPad Development Kit.

TI Driver Configuration

TI Drivers rely on the application to supply the driver configuration. The majority of this configuration is supplied in 'C' structures and arrays. For example, the below code (generated by SysConfig) sets up a I2C peripheral to be used in a TI Drivers example for the CC3235S_LAUNCHXL board.

/*
 *  =============================== I2C ===============================
 */

#include <ti/drivers/I2C.h>
#include <ti/drivers/i2c/I2CCC32XX.h>
#include <ti/devices/cc32xx/inc/hw_ints.h>
#include <ti/devices/cc32xx/inc/hw_memmap.h>

#define CONFIG_I2C_COUNT 1

I2CCC32XX_Object i2cCC32XXObjects[CONFIG_I2C_COUNT];

const I2CCC32XX_HWAttrsV1 i2cCC32XXHWAttrs[CONFIG_I2C_COUNT] = {
    /* CONFIG_I2C_TMP */
    /* LaunchPad I2C */
    {
        .baseAddr = I2CA0_BASE,
        .intNum = INT_I2CA0,
        .intPriority = (~0),
        .sclTimeout = 0x0,
        .clkPin  = I2CCC32XX_PIN_01_I2C_SCL,
        .dataPin = I2CCC32XX_PIN_02_I2C_SDA
    },
};

const I2C_Config I2C_config[CONFIG_I2C_COUNT] = {
    /* CONFIG_I2C_TMP */
    /* LaunchPad I2C */
    {
        .object = &i2cCC32XXObjects[CONFIG_I2C_TMP],
        .hwAttrs = &i2cCC32XXHWAttrs[CONFIG_I2C_TMP]
    },
};

const uint_least8_t CONFIG_I2C_TMP_CONST = CONFIG_I2C_TMP;
const uint_least8_t I2C_count = CONFIG_I2C_COUNT;

/*
 *  =============================== I2C ===============================
 */

#include <ti/drivers/I2C.h>
#include <ti/drivers/i2c/I2CCC26XX.h>
#include <ti/drivers/power/PowerCC26XX.h>

#include <ti/devices/DeviceFamily.h>
#include DeviceFamily_constructPath(inc/hw_ints.h)
#include DeviceFamily_constructPath(inc/hw_memmap.h)
#include DeviceFamily_constructPath(driverlib/ioc.h)

#define CONFIG_I2C_COUNT 1

/*
 *  ======== i2cCC26xxObjects ========
 */
I2CCC26XX_Object i2cCC26xxObjects[CONFIG_I2C_COUNT];

/*
 *  ======== i2cCC26xxHWAttrs ========
 */
const I2CCC26XX_HWAttrsV1 i2cCC26xxHWAttrs[CONFIG_I2C_COUNT] = {
    /* CONFIG_I2C_0 */
    {
        .baseAddr    = I2C0_BASE,
        .powerMngrId = PowerCC26XX_PERIPH_I2C0,
        .intNum      = INT_I2C_IRQ,
        .intPriority = (~0),
        .swiPriority = 0,
        .sclPin      = CONFIG_GPIO_I2C_0_SCL,
        .sclPinMux   = IOC_PORT_MCU_I2C_MSSCL,
        .sdaPin      = CONFIG_GPIO_I2C_0_SDA,
        .sdaPinMux   = IOC_PORT_MCU_I2C_MSSDA
    },
};

/*
 *  ======== I2C_config ========
 */
const I2C_Config I2C_config[CONFIG_I2C_COUNT] = {
    /* CONFIG_I2C_0 */
    {
        .object      = &i2cCC26xxObjects[CONFIG_I2C_0],
        .hwAttrs     = &i2cCC26xxHWAttrs[CONFIG_I2C_0]
    },
};

const uint_least8_t CONFIG_I2C_0_CONST = CONFIG_I2C_0;
const uint_least8_t I2C_count = CONFIG_I2C_COUNT;

This approach minimizes runtime allocation and overall footprint of the application.

The following two sections show the two ways this configuration is supplied

• SysConfig: source code is generated based on configuration in SysConfig
• Legacy: application supplies the source code

SysConfig Approach

With SysConfig, the configuration of the TI Drivers is the same, but instead of having the application writer supply the 'C' structures/arrays (Legacy Approach below), the SysConfig tool generates the 'C' code for you instead. Let's take a look at how this is reflected in the empty drivers projects.

The .syscfg file in a project holds all the configuration for the TI Drivers that will be used by the application. As part of the build, SysConfig will parse the .syscfg file and generate the needed 'C' structures/arrays for the TI Drivers.

• CC32xx
• CC13xx and CC26xx

The Generated Source folder also contains the generated source files. It was provided to allow a user to quickly see the generated files instead of going into the Debug directory.

Let's look a bit closer at some of the files in the Debug\syscfg directory:

• ti_drivers_config.c/.h: Driver configuration source files that will be compiled and linked into the application.
• ti_sysbios_config.c/.h: TI-RTOS7 (SysBios) configuration source files that will be compiled and linked into the application (if present).
• ti_devices_config.c: Device configuration file (CCFG) that will be compiled and linked into the application (if present).
• ti_utils_build_linker.cmd.genlibs: Additional linker file for the project. More details on this later.
• syscfg_c.rov.xs: Brings in additional Runtime Object Views (if present). More details on this later.

Then if you peek into ti_drivers_config.c for this example, we only see the configuration that is needed for the application (e.g. no I2C configuration since the empty example does not use I2C).

   /*
    *  ======== ti_drivers_config.c ========
    *  Configured TI-Drivers module definitions
    *
    *  DO NOT EDIT - This file is generated for the CC3235S_LAUNCHXL
    *  by the SysConfig tool.
    */

   #include <stddef.h>

   #ifndef DeviceFamily_CC3220
   #define DeviceFamily_CC3220
   #endif

   #include <ti/devices/DeviceFamily.h>

   #include "ti_drivers_config.h"

   /*
    *  =============================== GPIO ===============================
    */

   #include <ti/drivers/GPIO.h>
   #include <ti/drivers/gpio/GPIOCC32XX.h>

   /*
    *  ======== gpioPinConfigs ========
    *  Array of Pin configurations
    */
   GPIO_PinConfig gpioPinConfigs[] = {
       /* CONFIG_GPIO_LED_0 : LaunchPad Blue LED */
       GPIOCC32XX_GPIO_09 | GPIO_CFG_OUT_STD | GPIO_CFG_OUT_STR_MED | GPIO_CFG_OUT_LOW,
   };

   /*
    *  ======== gpioCallbackFunctions ========
    *  Array of callback function pointers
    *
    *  NOTE: Unused callback entries can be omitted from the callbacks array to
    *  reduce memory usage by enabling callback table optimization
    *  (GPIO.optimizeCallbackTableSize = true)
    */
   GPIO_CallbackFxn gpioCallbackFunctions[] = {
       /* CONFIG_GPIO_LED_0 : LaunchPad Blue LED */
       NULL,
   };

   /*
    *  ======== GPIOCC32XX_config ========
    */
   const GPIOCC32XX_Config GPIOCC32XX_config = {
       .pinConfigs = (GPIO_PinConfig *)gpioPinConfigs,
       .callbacks = (GPIO_CallbackFxn *)gpioCallbackFunctions,
       .numberOfPinConfigs = 1,
       .numberOfCallbacks = 1,
       .intPriority = (~0)
   };


   /*
    *  =============================== Power ===============================
    */
   #include <ti/drivers/Power.h>
   #include <ti/drivers/power/PowerCC32XX.h>
   #include <ti/devices/cc32xx/driverlib/prcm.h>
   #include "ti_drivers_config.h"

   extern void PowerCC32XX_initPolicy(void);
   extern void PowerCC32XX_sleepPolicy(void);
   PowerCC32XX_ParkInfo parkInfo[];
   /*
    *  This structure defines the configuration for the Power Manager.
    */
   const PowerCC32XX_ConfigV1 PowerCC32XX_config = {
       .policyInitFxn             = PowerCC32XX_initPolicy,
       .policyFxn                 = PowerCC32XX_sleepPolicy,
       .enterLPDSHookFxn          = NULL,
       .resumeLPDSHookFxn         = NULL,
       .enablePolicy              = false,
       .enableGPIOWakeupLPDS      = true,
       .enableGPIOWakeupShutdown  = true,
       .enableNetworkWakeupLPDS   = true,
       .wakeupGPIOSourceLPDS      = PRCM_LPDS_GPIO13,
       .wakeupGPIOTypeLPDS        = PRCM_LPDS_FALL_EDGE,
       .wakeupGPIOFxnLPDS         = NULL,
       .wakeupGPIOFxnLPDSArg      = 0,
       .wakeupGPIOSourceShutdown  = PRCM_HIB_GPIO13,
       .wakeupGPIOTypeShutdown    = PRCM_HIB_RISE_EDGE,
       .ramRetentionMaskLPDS      = PRCM_SRAM_COL_1|PRCM_SRAM_COL_2|PRCM_SRAM_COL_3|PRCM_SRAM_COL_4,
       .keepDebugActiveDuringLPDS = false,
       .ioRetentionShutdown       = PRCM_IO_RET_GRP_0|PRCM_IO_RET_GRP_1|PRCM_IO_RET_GRP_2|PRCM_IO_RET_GRP_3,
       .pinParkDefs               = parkInfo,
       .numPins                   = 31
   };


   #include <ti/drivers/power/PowerCC32XX.h>

   /*
    * This table defines the parking state to be set for each parkable pin
    * during LPDS. (Device resources must be parked during LPDS to achieve maximum
    * power savings.)  If the pin should be left unparked, specify the state
    * PowerCC32XX_DONT_PARK.  For example, for a UART TX pin, the device
    * will automatically park the pin in a high state during transition to LPDS,
    * so the Power Manager does not need to explictly park the pin.  So the
    * corresponding entries in this table should indicate PowerCC32XX_DONT_PARK.
    */
   PowerCC32XX_ParkInfo parkInfo[] = {
   /*        PIN                    PARK STATE              Pin Alias
      -----------------  ------------------------------     ---------------*/

     {PowerCC32XX_PIN01, PowerCC32XX_WEAK_PULL_DOWN_STD},   /* GP10 */
     {PowerCC32XX_PIN02, PowerCC32XX_WEAK_PULL_DOWN_STD},   /* GP11 */
     {PowerCC32XX_PIN03, PowerCC32XX_WEAK_PULL_DOWN_STD},   /* GP12 */
     {PowerCC32XX_PIN04, PowerCC32XX_WEAK_PULL_DOWN_STD},   /* GP13 */
     {PowerCC32XX_PIN05, PowerCC32XX_WEAK_PULL_DOWN_STD},   /* GP14 */
     {PowerCC32XX_PIN06, PowerCC32XX_WEAK_PULL_DOWN_STD},   /* GP15 */
     {PowerCC32XX_PIN07, PowerCC32XX_WEAK_PULL_DOWN_STD},   /* GP16 */
     {PowerCC32XX_PIN08, PowerCC32XX_WEAK_PULL_DOWN_STD},   /* GP17 */
     {PowerCC32XX_PIN13, PowerCC32XX_WEAK_PULL_DOWN_STD},
     {PowerCC32XX_PIN15, PowerCC32XX_WEAK_PULL_DOWN_STD},   /* GP22 */
     {PowerCC32XX_PIN16, PowerCC32XX_WEAK_PULL_DOWN_STD},   /* TDI */
     {PowerCC32XX_PIN17, PowerCC32XX_WEAK_PULL_DOWN_STD},   /* TDO */
     {PowerCC32XX_PIN18, PowerCC32XX_WEAK_PULL_DOWN_STD},   /* GP28 */
     {PowerCC32XX_PIN19, PowerCC32XX_WEAK_PULL_DOWN_STD},   /* TCK */
     {PowerCC32XX_PIN20, PowerCC32XX_WEAK_PULL_DOWN_STD},   /* TMS */
     {PowerCC32XX_PIN21, PowerCC32XX_WEAK_PULL_DOWN_STD},   /* SOP2 */
     {PowerCC32XX_PIN29, PowerCC32XX_WEAK_PULL_DOWN_STD},
     {PowerCC32XX_PIN30, PowerCC32XX_WEAK_PULL_DOWN_STD},
     {PowerCC32XX_PIN45, PowerCC32XX_WEAK_PULL_DOWN_STD},   /* GP31 */
     {PowerCC32XX_PIN50, PowerCC32XX_WEAK_PULL_DOWN_STD},   /* GP00 */
     {PowerCC32XX_PIN52, PowerCC32XX_WEAK_PULL_DOWN_STD},   /* GP32 */
     {PowerCC32XX_PIN53, PowerCC32XX_WEAK_PULL_DOWN_STD},   /* GP30 */
     {PowerCC32XX_PIN55, PowerCC32XX_WEAK_PULL_UP_STD},   /* GP01 */
     {PowerCC32XX_PIN57, PowerCC32XX_WEAK_PULL_UP_STD},   /* GP02 */
     {PowerCC32XX_PIN58, PowerCC32XX_WEAK_PULL_DOWN_STD},   /* GP03 */
     {PowerCC32XX_PIN59, PowerCC32XX_WEAK_PULL_DOWN_STD},   /* GP04 */
     {PowerCC32XX_PIN60, PowerCC32XX_WEAK_PULL_DOWN_STD},   /* GP05 */
     {PowerCC32XX_PIN61, PowerCC32XX_WEAK_PULL_DOWN_STD},   /* GP06 */
     {PowerCC32XX_PIN62, PowerCC32XX_WEAK_PULL_DOWN_STD},   /* GP07 */
     {PowerCC32XX_PIN63, PowerCC32XX_WEAK_PULL_DOWN_STD},   /* GP08 */
     {PowerCC32XX_PIN64, PowerCC32XX_WEAK_PULL_DOWN_STD},   /* GP09 */
   };


   #include <ti/drivers/Board.h>

   /*
    *  ======== Board_initHook ========
    *  Perform any board-specific initialization needed at startup.  This
    *  function is declared weak to allow applications to override it if needed.
    */
   void __attribute__((weak)) Board_initHook(void)
   {
   }

   /*
    *  ======== Board_init ========
    *  Perform any initialization needed before using any board APIs
    */
   void Board_init(void)
   {
       /* ==== /ti/drivers/Power initialization ==== */
       PRCMCC3200MCUInit();
       Power_init();

       Board_initHook();
   }

    /*
     *  ======== ti_drivers_config.c ========
     *  Configured TI-Drivers module definitions
     *
     *  DO NOT EDIT - This file is generated for the CC26X2R1_LAUNCHXL
     *  by the SysConfig tool.
     */

    #include <stddef.h>
    #include <stdint.h>

    #ifndef DeviceFamily_CC26X2
    #define DeviceFamily_CC26X2
    #endif

    #include <ti/devices/DeviceFamily.h>

    #include "ti_drivers_config.h"

    /*
     *  =============================== GPIO ===============================
     */

    #include <ti/drivers/GPIO.h>
    #include <ti/drivers/gpio/GPIOCC26XX.h>

    /* The range of pins available on this device */
    const uint_least8_t GPIO_pinLowerBound = 0;
    const uint_least8_t GPIO_pinUpperBound = 30;

    /*
     *  ======== gpioPinConfigs ========
     *  Array of Pin configurations
     */
    GPIO_PinConfig gpioPinConfigs[31] = {
        GPIO_CFG_NO_DIR, /* DIO_0 */
        GPIO_CFG_NO_DIR, /* DIO_1 */
        GPIO_CFG_NO_DIR, /* DIO_2 */
        GPIO_CFG_NO_DIR, /* DIO_3 */
        GPIO_CFG_NO_DIR, /* DIO_4 */
        GPIO_CFG_NO_DIR, /* DIO_5 */
        GPIO_CFG_OUTPUT_INTERNAL | GPIO_CFG_OUT_STR_MED | GPIO_CFG_OUT_LOW, /* CONFIG_GPIO_LED_0 */
        GPIO_CFG_NO_DIR, /* DIO_7 */
        GPIO_CFG_NO_DIR, /* DIO_8 */
        GPIO_CFG_NO_DIR, /* DIO_9 */
        GPIO_CFG_NO_DIR, /* DIO_10 */
        GPIO_CFG_NO_DIR, /* DIO_11 */
        GPIO_CFG_NO_DIR, /* DIO_12 */
        GPIO_CFG_NO_DIR, /* DIO_13 */
        GPIO_CFG_NO_DIR, /* DIO_14 */
        GPIO_CFG_NO_DIR, /* DIO_15 */
        GPIO_CFG_NO_DIR, /* DIO_16 */
        GPIO_CFG_NO_DIR, /* DIO_17 */
        GPIO_CFG_NO_DIR, /* DIO_18 */
        GPIO_CFG_NO_DIR, /* DIO_19 */
        GPIO_CFG_NO_DIR, /* DIO_20 */
        GPIO_CFG_NO_DIR, /* DIO_21 */
        GPIO_CFG_NO_DIR, /* DIO_22 */
        GPIO_CFG_NO_DIR, /* DIO_23 */
        GPIO_CFG_NO_DIR, /* DIO_24 */
        GPIO_CFG_NO_DIR, /* DIO_25 */
        GPIO_CFG_NO_DIR, /* DIO_26 */
        GPIO_CFG_NO_DIR, /* DIO_27 */
        GPIO_CFG_NO_DIR, /* DIO_28 */
        GPIO_CFG_NO_DIR, /* DIO_29 */
        GPIO_CFG_NO_DIR, /* DIO_30 */
    };

    /*
     *  ======== gpioCallbackFunctions ========
     *  Array of callback function pointers
     *  Change at runtime with GPIO_setCallback()
     */
    GPIO_CallbackFxn gpioCallbackFunctions[31];

    /*
     *  ======== gpioUserArgs ========
     *  Array of user argument pointers
     *  Change at runtime with GPIO_setUserArg()
     *  Get values with GPIO_getUserArg()
     */
    void* gpioUserArgs[31];

    const uint_least8_t CONFIG_GPIO_LED_0_CONST = CONFIG_GPIO_LED_0;

    /*
     *  ======== GPIO_config ========
     */
    const GPIO_Config GPIO_config = {
        .configs = (GPIO_PinConfig *)gpioPinConfigs,
        .callbacks = (GPIO_CallbackFxn *)gpioCallbackFunctions,
        .userArgs = gpioUserArgs,
        .intPriority = (~0)
    };

    /*
     *  =============================== Power ===============================
     */
    #include <ti/drivers/Power.h>
    #include <ti/drivers/power/PowerCC26X2.h>
    #include "ti_drivers_config.h"

    extern void PowerCC26XX_standbyPolicy(void);
    extern bool PowerCC26XX_calibrate(unsigned int);

    const PowerCC26X2_Config PowerCC26X2_config = {
        .enablePolicy             = true,
        .policyInitFxn            = NULL,
        .policyFxn                = PowerCC26XX_standbyPolicy,
        .calibrateFxn             = PowerCC26XX_calibrate,
        .calibrateRCOSC_LF        = true,
        .calibrateRCOSC_HF        = true,
        .enableTCXOFxn            = NULL
    };

    #include <stdbool.h>

    #include <ti/devices/cc13x2_cc26x2/driverlib/ioc.h>
    #include <ti/devices/cc13x2_cc26x2/driverlib/cpu.h>

    #include <ti/drivers/GPIO.h>

    /* Board GPIO defines */
    #define BOARD_EXT_FLASH_SPI_CS      20
    #define BOARD_EXT_FLASH_SPI_CLK     10
    #define BOARD_EXT_FLASH_SPI_MOSI    9
    #define BOARD_EXT_FLASH_SPI_MISO    8


    /*
     *  ======== Board_sendExtFlashByte ========
     */
    void Board_sendExtFlashByte(uint8_t byte)
    {
        uint8_t i;

        /* SPI Flash CS */
        GPIO_write(BOARD_EXT_FLASH_SPI_CS, 0);

        for (i = 0; i < 8; i++) {
            GPIO_write(BOARD_EXT_FLASH_SPI_CLK, 0); /* SPI Flash CLK */

            /* SPI Flash MOSI */
            GPIO_write(BOARD_EXT_FLASH_SPI_MOSI, (byte >> (7 - i)) & 0x01);
            GPIO_write(BOARD_EXT_FLASH_SPI_CLK, 1);  /* SPI Flash CLK */

            /*
             * Waste a few cycles to keep the CLK high for at
             * least 45% of the period.
             * 3 cycles per loop: 8 loops @ 48 Mhz = 0.5 us.
             */
            CPUdelay(8);
        }

        GPIO_write(BOARD_EXT_FLASH_SPI_CLK, 0);  /* CLK */
        GPIO_write(BOARD_EXT_FLASH_SPI_CS, 1);  /* CS */

        /*
         * Keep CS high at least 40 us
         * 3 cycles per loop: 700 loops @ 48 Mhz ~= 44 us
         */
        CPUdelay(700);
    }

    /*
     *  ======== Board_wakeUpExtFlash ========
     */
    void Board_wakeUpExtFlash(void)
    {
        /* SPI Flash CS*/
        GPIO_setConfig(BOARD_EXT_FLASH_SPI_CS, GPIO_CFG_OUTPUT | GPIO_CFG_OUT_HIGH | GPIO_CFG_OUT_STR_MED);

        /*
         *  To wake up we need to toggle the chip select at
         *  least 20 ns and ten wait at least 35 us.
         */

        /* Toggle chip select for ~20ns to wake ext. flash */
        GPIO_write(BOARD_EXT_FLASH_SPI_CS, 0);
        /* 3 cycles per loop: 1 loop @ 48 Mhz ~= 62 ns */
        CPUdelay(1);
        GPIO_write(BOARD_EXT_FLASH_SPI_CS, 1);
        /* 3 cycles per loop: 560 loops @ 48 Mhz ~= 35 us */
        CPUdelay(560);
    }

    /*
     *  ======== Board_shutDownExtFlash ========
     */
    void Board_shutDownExtFlash(void)
    {
        /*
         *  To be sure we are putting the flash into sleep and not waking it,
         *  we first have to make a wake up call
         */
        Board_wakeUpExtFlash();

        /* SPI Flash CS*/
        GPIO_setConfig(BOARD_EXT_FLASH_SPI_CS, GPIO_CFG_OUTPUT | GPIO_CFG_OUT_HIGH | GPIO_CFG_OUT_STR_MED);
        /* SPI Flash CLK */
        GPIO_setConfig(BOARD_EXT_FLASH_SPI_CLK, GPIO_CFG_OUTPUT | GPIO_CFG_OUT_LOW | GPIO_CFG_OUT_STR_MED);
        /* SPI Flash MOSI */
        GPIO_setConfig(BOARD_EXT_FLASH_SPI_MOSI, GPIO_CFG_OUTPUT | GPIO_CFG_OUT_LOW | GPIO_CFG_OUT_STR_MED);
        /* SPI Flash MISO */
        GPIO_setConfig(BOARD_EXT_FLASH_SPI_MISO, GPIO_CFG_IN_PD);

        uint8_t extFlashShutdown = 0xB9;

        Board_sendExtFlashByte(extFlashShutdown);

        GPIO_resetConfig(BOARD_EXT_FLASH_SPI_CS);
        GPIO_resetConfig(BOARD_EXT_FLASH_SPI_CLK);
        GPIO_resetConfig(BOARD_EXT_FLASH_SPI_MOSI);
        GPIO_resetConfig(BOARD_EXT_FLASH_SPI_MISO);
    }


    #include <ti/drivers/Board.h>

    /*
     *  ======== Board_initHook ========
     *  Perform any board-specific initialization needed at startup.  This
     *  function is declared weak to allow applications to override it if needed.
     */
    void __attribute__((weak)) Board_initHook(void)
    {
    }

    /*
     *  ======== Board_init ========
     *  Perform any initialization needed before using any board APIs
     */
    void Board_init(void)
    {
        /* ==== /ti/drivers/Power initialization ==== */
        Power_init();

        /* ==== /ti/devices/CCFG initialization ==== */

        /* ==== /ti/drivers/GPIO initialization ==== */
        /* Setup GPIO module and default-initialise pins */
        GPIO_init();

        Board_shutDownExtFlash();

        Board_initHook();
    }

The SysConfig approach has the following advantages over having the application writer supply source code:

• Adding a driver instance is easier.
• Reduces the number of mistakes since the 'C' code is generated instead of hand-written (or copied/pasted).
• The source files are specifically tailored to your application with SysConfig. With the legacy approach, TI Drivers examples have worst-case coverage (e.g. I2C configuration is present even if not using it).
• SysConfig reduces the number of source files from three to two for TI Driver's configuration.
• Changes between versions are handled more seamlessly. Note: this is not a common occurrence, but annoying when it happens!

Legacy Approach

Projects must supply the needed TI Driver configuration in the Board source files.

Board Files

Here is the empty project from an older SDK for the CC26X2R1_LAUNCHXL. The Board source files that contain the TI Drivers configuration are circled.

Generally, the Board source file are the same for all TI Driver examples for a given board.

Lab: Getting started

For this lab, we are going to import the Empty example from the examples\rtos\<board>\drivers\empty directory. We'll do the following things in the below tasks:

• Investigate the .syscfg file
• Configure the Display module in SysConfig
• Configure the Watchdog module in SysConfig
• Add a button via SysConfig that will stop the tickling/feeding of the Watchdog timer.

The below steps will use simplelink_cc32xx_sdk along with the CC3235S_LAUNCHXL LaunchPad board. So some of the pictures/directory names/line numbers/sizes/etc. might be slightly different if you are using a different board or version.

Task 1 - Importing an Example

Start your Desktop CCS and import the TI-RTOS7 empty project from your SimpleLink SDK.

• CC32xx
• CC13xx and CC26xx

Task 2 - Verifying the Example Works

To test that the software and hardware pre-requisites are fulfilled, we are going to build and run the project before going forward. This will generate among others the ti_drivers_config.c and ti_drivers_config.h files.

1. Our first mission is to build the imported project. Select the project in Project Explorer and choose Project → Build Project from the menu. Notice in the beginning of the application project build log that SysConfig generates the ti_drivers_config.c and ti_drivers_config.h files (which are now in the Debug/syscfg directory).

• CC32xx
• CC13xx and CC26xx

• When the project is built, we are going to make sure that the hardware and debugger work.
  • Make sure the target is connected to the computer via the appropriate USB cable.
  • To start debugging, select Run → Debug, or press F11.
• When the download is finished, press F8 or the green play icon to run.
• You should see an LED toggle every second. Here is the code for the toggling in empty.c. Remember the constant CONFIG_GPIO_LED_0! We'll see where it comes from in the next step...
  Select text

    while (1) {
        sleep(time);
        GPIO_toggle(CONFIG_GPIO_LED_0);
    }
  

  empty :: main()

Task 3 - Exploring SysConfig (Software)

Now that we've confirmed the setup is working, now let's actually look at the SysConfig GUI Tool in CCS. We'll see where the CONFIG_GPIO_LED_0 constant was defined and how the GPIO configuration was done.

• Double-click the empty.syscfg file in the Project Explorer. After a couple seconds you should see this window:

• CC32xx
• CC13xx and CC26xx

• Let's look at a preview of the TI Driver configuration code that is going to be generated by the empty.syscfg file. Select the <> icon on the top right of the SysConfig GUI. Note: all SysConfig generated files can be previewed here. For example the syscfg_c.rov.xs file is generated for viewing non-TI-RTOS modules in Runtime Object View and ti_ndk_config.c file for MSP432E4 Networking configuration.

• CC32xx
• CC13xx and CC26xx

• Click the ti_drivers_config.c file. This opens the preview of the generated ti_drivers_config.c. In later tasks in this lab, you'll see this file updated as we change the TI Driver configuration. As you look at the ti_drivers_config.c, you'll notice it is rather empty (as expected...the project is called Empty after all). Let's look at a couple key items in this file.

  • Generation Disclaimer: At the top, you'll see the disclaimer to not modify this file since it is generated. Any changes made to this file will be wiped out when it is re-generated. We'll show how to modify these generated files later on in this lab. (Spoiler...)
  • Configuration of the LED: The configuration for the LED that this example uses.

  • As changes are made, green shading denotes additions and red shading denotes removed items (we'll see this in action later).

    

    Device/Board Specific

    Since the low level driver configuration is device/board specific, if you are using a different device or board, your generated ti_drivers_config.c will have different names for the constants and data structures than shown here.

• Select the GPIO module in the Software view. Here is the configuration for the LED that the example uses.

• CC32xx
• CC13xx and CC26xx

Where did the LaunchPad Blue LED in the Use Hardware field in the above picture come from?

Next section :)

Where did the LaunchPad LED Red in the Use Hardware field in the above picture come from?

Next section :)

• Use the board view to see which pins of the LaunchPad are used

  
  This view can also be used to configure the project for a custom board (see button "Use Custom Board") and for board or device migration (see button "switch").

• Use the device view to see which pins of the device are used.

  
  This view can also be used for board or device migration (see button "switch").

• Display other useful views such as the Problems, History or Preferences & Actions. Note: the buttons to display all these views might be hidden. If so, click the "More Views" button (i.e. the three dots button) to find them.

  

Task 4 - Exploring SysConfig (Hardware)

1. Select the Hardware view. The hardware components on this LaunchPad are defined under this section.

• CC32xx
• CC13xx and CC26xx

You can see that the LaunchPad Blue LED is currently being used (green check-mark) and the software configuration of it. On the other hand, you can see that the green and red LEDs are not currently in use.

You can see that the LaunchPad LED Red is currently being used (green check-mark) and the software configuration of it. On the other hand, you can see that the LED green and the buttons are not currently in use.

Task 5 - Output via the Display Module

Let's start using SysConfig to configure new things! First let's add a Display_printf to see output via the UART. All SimpleLink LaunchPads have a back-channel UART via the emulation USB cable.

1. Have the ti_drivers_config.c preview open in SysConfig. We can see the Display source code configuration get added when you do the next step!

2. In SysConfig, go back to the Software view, click the + icon next to the Display module and then select XDS110 UART in the Use Hardware drop-down and save the file. When you hit the + icon, you'll see the ti_drivers_config.c file change in the preview.

• CC32xx
• CC13xx and CC26xx

• Now let's add the usage of the Display module into the empty.c file.

  • Add Display.h header

    Select text

    #include <ti/display/Display.h>
    

    empty.c Add in with other #includes

  • Add initialization of the Display instance. Also add a count variable that will be used in the Display_printf.

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    Display_init();
    Display_Handle hSerial = Display_open(Display_Type_UART, NULL);
    uint32_t count = 0;
    

    empty.c :: mainThread() in the function before the while loop.

  • Add the Display_print call into the while loop.

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    while (1) {
       sleep(time);
       GPIO_toggle(CONFIG_GPIO_LED_0);
       Display_printf(hSerial, 1, 0, "LED Toggle %d", count++);
    }
    

    empty.c :: mainThread() the new while loop

• Rebuild/load/run the application.

• Open your favorite terminal application (e.g. PuTTY, CCS Terminal). You'll probably need to use Device Manager (if using Windows) to determine the correct COM port.

  

  with the following settings (note your COM port will most likely be different!).

  

  You should see the output in the terminal session

  

Where do I learn more about the Display module in SysConfig?

The TI Drivers and Display module are covered in the <SimpleLink_SDK_Install_Dir>/docs/tidrivers/tidriversAPIs.html file. You can get to a specific module via SysConfig. In the module view, click the ?

Here is the description text and link for the Display module.

Additionally, if the hover over a configuration field, you generally will get more information about the field.

Task 6 - Add Watchdog

Most production applications include some type of Watchdog timer to help in unexpected behavior. We are going to add a Watchdog timer into the application. We'll keep it simple and not have it restart the application. It will only set a flag to denote that it has expired.

1. In SysConfig, click the + icon next to the Watchdog module and then change the Period to 1500. Remember to save the file!

   

2. Now let's add the usage of the Watchdog module into the empty.c file.

   • Add header and some global variables

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     #include <ti/drivers/Watchdog.h>
     volatile uint8_t serviceFlag = 1;
     volatile uint8_t watchdogExpired = 0;
     Watchdog_Handle watchdogHandle;
     

     empty.c Add in with other #includes

   • Open the Watchdog peripheral

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     Watchdog_init();
     
     Watchdog_Params params;
     Watchdog_Params_init(&params);
     params.callbackFxn = (Watchdog_Callback)watchdogCallback;
     params.resetMode = Watchdog_RESET_OFF;
     
     watchdogHandle = Watchdog_open(CONFIG_WATCHDOG_0, &params);
     if (watchdogHandle == NULL) {
       /* Error opening Watchdog */
       while (1);
     }
     

     empty.c :: mainThread() in the function before the while loop.

   • Add the Watchdog callback. Note this function is specified in the Watchdog parameters above.

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     void watchdogCallback(uintptr_t unused)
     {
       /* Clear watchdog interrupt flag */
       Watchdog_clear(watchdogHandle);
       watchdogExpired = 1;
       serviceFlag = 1;
     }
     

     empty.c above the mainThread function

   • Add the tickling/feeding of the Watchdog timer and debug output to show that the Watchdog timer expired in the while loop.

     Select text

     while (1) {
        sleep(time);
        GPIO_toggle(CONFIG_GPIO_LED_0);
        Display_printf(hSerial, 1, 0, "LED Toggle %d", count++);
     
        if (watchdogExpired) {
          Display_printf(hSerial, 1, 0, "Watchdog expired!");
          watchdogExpired = 0;
        }
     
        if (serviceFlag) {
          Watchdog_clear(watchdogHandle);
          Display_printf(hSerial, 1, 0, "Cleared WD");
        }
     }
     

     empty.c modified while loop

3. Rebuild/load/run the application.

Task 7 - Add a button

Let's add a button to the application. When pressed, it will disable the tickling/feeding of the Watchdog in the while loop.

1. Have the ti_drivers_config.h preview open in SysConfig. We can see the name of the button get modified as we change it!

2. In SysConfig, let's add a button via the Hardware view instead of Software.

   • CC32xx
   • CC13xx and CC26xx

   • Select Hardware and click the + icon next to LaunchPad User Button SW2 (Left). Make sure to select GPIO.

     

   • Select Hardware and click the + icon next to LaunchPad Button BTN-1 (Left). Make sure to select GPIO.

     

3. Configure the GPIO used by the button

   • CC32xx
   • CC13xx and CC26xx

   • Change the name of the constant to WDBUTTON. Note: you'll see the name change in the ti_drivers_config.h preview window.
   • Select Pull Up for the Pull field and Falling Edge for the Interrupt Trigger.

   • Finally, set the button callback to stopTicklingWatchdog

     

   • Change the name of the constant to WDBUTTON. Note: you'll see the name change in the ti_drivers_config.h preview window.
   • Select None for the Pull field and Falling Edge for the Interrupt Trigger.

   • Finally, set the button callback to stopTicklingWatchdog

     

4. Now let's add the usage of the button into the empty.c file.

   • Add the enabling of the callback. Note the name of the constant is from the SysConfig Name setting.

     Select text

     GPIO_enableInt(WDBUTTON);
     

     empty.c after the GPIO_setConfig

   • Add the callback (note the name must match the SysConfig Callback Function setting).

   Select text

   void stopTicklingWatchdog(uint_least8_t index)
   {
      serviceFlag = 0;
   }
   

   empty.c above the mainThread function

5. Rebuild/load/run the application.

6. Hit BTN-1 (or whatever button you specify) refer to Board.html for details. Your output should denote that the Watchdog did expire.

   

Quiz

Click on the "Show Board" button.

What is this for?

Another way to configure the pins Currently a read-only visual view of the board

Quiz

Click on the "Reserve Peripherals" button.

What is this used for?

Another way to configure the pins To prevent SysConfig to use certain peripherals and GPIOs

(Optional) Task 8 - How to "disable" SysConfig

Great! You have your configuration setup, but you'd like to add some comments in the ti_drivers_config.c or ti_drivers_config.h files or simply "freeze" them. How do you do this?

SysConfig provides a way to exclude from the generation some of the files.

1. Select the <> icon on the top right of the SysConfig GUI.

2. Files can be included or excluded from the generation using the Include in build button.

   

1. Copy the *.c and *.h files you have excluded from build from Debug/syscfg into your project's root directory. Don't try to copy them from the Generated Sources directory. This is just a short-cut to view the files.

2. If you have exluded ti_utils_build_linker.cmd.genlibs, copy ti_utils_build_linker.cmd.genlibs into your project's root directory. Additionally, modify the Project Properties → Build → ARM Linker → File Search Path to include ${PROJECT_LOC}. This is needed to pickup the new location of the generated linker file.

   

3. If you have exluded it, copy syscfg_c.rov.xs into your project's root directory. This file is needed for some modules to show up in Runtime Object View (ROV).

4. Rebuild/load/run the application. It will behave the same except the files will not be re-generated.

(Optional) Task 9 - Moving to a new SDK Version

You have everything configured via SysConfig with a specific version of the SDK and the application is working well...great! What happens when you move to a newer version of the SDK? Here are the high-level steps that you need to do:

1. Install the new SDK and have CCS discover it.

2. Move the working application to the new SDK (refer to the SimpleLink User Guide for details on how to do this).

3. Rebuild the application. This will regenerate the files based on the new content in the new SDK. Please note that SysConfig really has two pieces

   • The SysConfig GUI/cmdline tool (available in CCS or as a stand-alone tool).
   • The meta-data in the SimpleLink SDKs that the SysConfig tool reads to build up the views (e.g. the Display module in the SDK specifies that it supports, UART, Console and LCD).

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.