[参考译文] PROCESSOR-SDK-J784S4：GPIO API 使用情况

https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1477804/processor-sdk-j784s4-gpio-api-usage

工具/软件：

大家好：

我正在尝试使用 TDA4 上的 GPIO API 来测试外部看门狗。
以下是我基于在论坛上其他主题中看到的代码的相关代码：

#define PADCONFIG_34      0x0011C088
#define WKUP_PADCONFIG_23 0x4301C05C
#define WKUP_PADCONFIG_41 0x4301C0A4

#define MCU_WDT_WDI_PIN   (38U)
#define MCU_WDT_WDO_PIN   (34U)

#define SYS_MCU_PWRDN_PIN (55U)


static void watchdog_isr(void)
{
    App_ConsolePrintf("Watchdog triggered!\n");

    // Make rising edge on SYS_MCU_PWRDN pin
    GPIOPinWrite_v0(CSL_WKUP_GPIO0_BASE, SYS_MCU_PWRDN_PIN, GPIO_PIN_LOW);
    GPIOPinWrite_v0(CSL_WKUP_GPIO0_BASE, SYS_MCU_PWRDN_PIN, GPIO_PIN_HIGH);
}

GPIO_PinConfig gpioPinConfigs[] = {
    GPIO_DEVICE_CONFIG(0, MCU_WDT_WDO_PIN) |
    GPIO_CFG_IN_INT_FALLING | GPIO_CFG_INPUT,

    GPIO_DEVICE_CONFIG(0, MCU_WDT_WDI_PIN) |
    GPIO_CFG_OUTPUT,

    GPIO_DEVICE_CONFIG(0, SYS_MCU_PWRDN_PIN) |
    GPIO_CFG_OUTPUT
};

GPIO_CallbackFxn callbacks[] = {
    watchdog_isr,
    NULL,
    NULL
};

GPIO_v0_Config GPIO_v0_config = {
    gpioPinConfigs,
    callbacks,
    sizeof(gpioPinConfigs) / sizeof(gpioPinConfigs[0]),
    sizeof(callbacks) / sizeof(callbacks[0]),
    ~0
};

void AppGPIOPadConfig()
{
    *(uint32_t*)PADCONFIG_34      = 0x00060007;
    *(uint32_t*)WKUP_PADCONFIG_23 = 0x00010007;
    *(uint32_t*)WKUP_PADCONFIG_41 = 0x00010007;
}


///////////////////////////////////////////////////////////

    GPIO_v0_HwAttrs gpio_cfg;
    GPIO_socGetInitCfg(0, &gpio_cfg);
    gpio_cfg.baseAddr = CSL_WKUP_GPIO0_BASE;
    (gpio_cfg.intCfg[0]).intcMuxNum = INVALID_INTC_MUX_NUM;
    (gpio_cfg.intCfg[0]).intcMuxInEvent = 0;
    (gpio_cfg.intCfg[0]).intcMuxOutEvent = 0;
    GPIO_socSetInitCfg(0, &gpio_cfg);

    GPIO_init();

    //GPIO_setCallback(0, watchdog_isr);
    GPIO_enableInt(0);

    AppGPIOPadConfig();

    GPIOSetDirMode_v0(CSL_WKUP_GPIO0_BASE, MCU_WDT_WDI_PIN, GPIO_DIRECTION_OUTPUT);
    GPIOPinWrite_v0(CSL_WKUP_GPIO0_BASE, MCU_WDT_WDI_PIN, GPIO_PIN_HIGH);

    //GPIOSetDirMode_v0(CSL_WKUP_GPIO0_BASE, MCU_WDT_WDO_PIN, GPIO_DIRECTION_INPUT);

    GPIOSetDirMode_v0(CSL_WKUP_GPIO0_BASE, SYS_MCU_PWRDN_PIN, GPIO_DIRECTION_OUTPUT);

    // Attempt to activate callback manually
    GPIO_toggle(0);
    Osal_delay(20);
    GPIO_toggle(0);

    for (uint32_t i = 0; i < 20; i++)
    {
        App_ConsolePrintf("\nNotifying watchdog...\n");

        // Make a falling edge on WDI and assert it back
        GPIOPinWrite_v0(CSL_WKUP_GPIO0_BASE, MCU_WDT_WDI_PIN, GPIO_PIN_LOW);
        GPIOPinWrite_v0(CSL_WKUP_GPIO0_BASE, MCU_WDT_WDI_PIN, GPIO_PIN_HIGH);

        Osal_delay(1000);
    }

    App_ConsolePrintf("\nStopped notifications. Waiting for watchog to trigger.\n");

    GPIOPinWrite_v0(CSL_WKUP_GPIO0_BASE, SYS_MCU_PWRDN_PIN, GPIO_PIN_LOW);
    Osal_delay(50);
    GPIOPinWrite_v0(CSL_WKUP_GPIO0_BASE, SYS_MCU_PWRDN_PIN, GPIO_PIN_HIGH);