项目工程框架

项目驱动文件这个见过，三个main文件真的是开了眼，一个main代表一个核吗？

按照以往对实现LED闪烁的流程，一般是先配置时钟、再配置IO、延时，实现反转效果。

Blinky_LED.c

在驱动文件里：

/*********************************************************************************************************************/
/*-----------------------------------------------------Includes------------------------------------------------------*/
/*********************************************************************************************************************/
#include "IfxPort.h"
#include "Bsp.h"

/*********************************************************************************************************************/
/*------------------------------------------------------Macros-------------------------------------------------------*/
/*********************************************************************************************************************/
#define LED         &MODULE_P00,5                                           /* LED: Port, Pin definition            */
#define WAIT_TIME   500                                                     /* Wait time constant in milliseconds   */

/*********************************************************************************************************************/
/*---------------------------------------------Function Implementations----------------------------------------------*/
/*********************************************************************************************************************/
/* This function initializes the port pin which drives the LED */
void initLED(void)
{
    /* Initialization of the LED used in this example */
    IfxPort_setPinModeOutput(LED, IfxPort_OutputMode_pushPull, IfxPort_OutputIdx_general);

    /* Switch OFF the LED (low-level active) */
    IfxPort_setPinHigh(LED);
}

/* This function toggles the port pin and wait 500 milliseconds */
void blinkLED(void)
{
    IfxPort_togglePin(LED);                                                     /* Toggle the state of the LED      */
    waitTime(IfxStm_getTicksFromMilliseconds(BSP_DEFAULT_TIMER, WAIT_TIME));    /* Wait 500 milliseconds            */
}

Bsp.h

这个看名字都可以猜出来，板级支持包。

默认系统定时器 MODULE_STM0 模式：

#ifndef BSP_DEFAULT_TIMER
/** Defined the default timer used */
#define BSP_DEFAULT_TIMER (&MODULE_STM0)
#endif

一些中断函数，使能或者不使能，甚至还可以返回中断的一些状态。

IFX_INLINE boolean areInterruptsEnabled(void);
IFX_INLINE boolean disableInterrupts(void);
IFX_INLINE void    enableInterrupts(void);
IFX_INLINE void    restoreInterrupts(boolean enabled);
IFX_INLINE void    forceDisableInterrupts(void);

还有一些系统定时器函数，非常有意思，有的可以查看你的程序运行了多长时间，有的可以查看程序距离结束还有多久……

/** \addtogroup library_srvsw_sysse_bsp_bsp
 * \{ */
/** \name Time APIs
 * \{ */
IFX_INLINE Ifx_TickTime addTTime(Ifx_TickTime a, Ifx_TickTime b);
IFX_INLINE Ifx_TickTime elapsed(Ifx_TickTime since);
IFX_INLINE Ifx_TickTime getDeadLine(Ifx_TickTime timeout);
IFX_INLINE Ifx_TickTime getTimeout(Ifx_TickTime deadline);
IFX_EXTERN void         initTime(void);
IFX_INLINE boolean      isDeadLine(Ifx_TickTime deadLine);
IFX_INLINE Ifx_TickTime now(void);
IFX_INLINE Ifx_TickTime nowWithoutCriticalSection(void);
IFX_INLINE boolean      poll(volatile boolean *test, Ifx_TickTime timeout);
IFX_INLINE Ifx_TickTime timingNoInterruptEnd(Ifx_TickTime since, boolean interruptEnabled);
IFX_INLINE Ifx_TickTime timingNoInterruptStart(boolean *interruptEnabled);
IFX_INLINE void         wait(Ifx_TickTime timeout);
IFX_EXTERN void         waitPoll(void);
IFX_EXTERN void         waitTime(Ifx_TickTime timeout);

/** Prototype for wait() functions */
typedef void (*WaitTimeFunction)(Ifx_TickTime timeout);

然后就是一些IO口的配置函数

#define PIN_DRIVER_STRONG_SHARP IfxPort_PadDriver_cmosAutomotiveSpeed1
#define Pin_setState(pin, mode)                            IfxPort_setPinState((pin)->port, (pin)->pinIndex, (mode))
#define Pin_setGroupState(pin, mask, data)                 IfxPort_setGroupState((pin)->port, (pin)->pinIndex, (mask), (data))
#define Pin_setMode(pin, mode)                             IfxPort_setPinMode((pin)->port, (pin)->pinIndex, (mode))
#define Pin_setDriver(pin, mode)                           IfxPort_setPinPadDriver((pin)->port, (pin)->pinIndex, (mode))
#define Pin_setStateHigh(pin)                              IfxPort_setPinHigh((pin)->port, (pin)->pinIndex)
#define Pin_setStateLow(pin)                               IfxPort_setPinLow((pin)->port, (pin)->pinIndex)
#define Pin_getState(pin)                                  IfxPort_getPinState((pin)->port, (pin)->pinIndex)
#define Pin_setGroupModeOutput(pin, mask, mode, outputIdx) IfxPort_setGroupModeOutput((pin)->port, (pin)->pinIndex, (mask), (mode), (outputIdx))
#define Pin_setGroupModeInput(pin, mask, mode)             IfxPort_setGroupModeInput((pin)->port, (pin)->pinIndex, (mask), (mode))
#define Pin_setGroupState(pin, mask, data)                 IfxPort_setGroupState((pin)->port, (pin)->pinIndex, (mask), (data))
#define Pin_getGroupState(pin, mask)                       IfxPort_getGroupState((pin)->port, (pin)->pinIndex, (mask))
#define Pin_enableEmgStop(pin)                             IfxPort_enableEmergencyStop((pin)->port, (pin)->pinIndex)

IfxPort.h

这个也是，看名字就可以大致猜出来，Port端口，关于端口的一些结构体参数、功能定义什么的。

如：

输入模式：

/** \brief Ifx_P output modification modes definition.
 */
typedef enum
{
    IfxPort_InputMode_undefined    = -1,//不定义
    IfxPort_InputMode_noPullDevice = 0 << 3,//？
        IfxPort_InputMode_pullDown = 1U << 3,//下拉
        IfxPort_InputMode_pullUp   = 2U << 3  //上拉 /**< \brief  */
} IfxPort_InputMode;

输出模式：

/** \brief Pin output mode definition
 */
typedef enum
{
    IfxPort_OutputMode_pushPull      = 0x10U << 3,
        IfxPort_OutputMode_openDrain = 0x18U << 3,
        IfxPort_OutputMode_none      = 0
} IfxPort_OutputMode;

初始化的：

/** \addtogroup IfxLld_Port_Std_DataStructures
 * \{ */
/** \brief Defines a pin
 */
typedef struct
{
    Ifx_P *port;
    uint8  pinIndex;
} IfxPort_Pin;

/** \brief To configure pins
 */
typedef struct
{
    Ifx_P            *port;
    uint8             pinIndex;
    IfxPort_OutputIdx mode;
    IfxPort_PadDriver padDriver;
} IfxPort_Pin_Config;

等等……

还有各种函数，非常细，具体的可以去查看这个头文件。

Cpu0_Main.c

*********************************************************************************************************************/
 /*\title Blinky LED
 * \abstract An LED is blinking based on the timing given by a wait function.
 * \description A wait function is used to add delays between switching on and switching off an LED
 *              on port pin P00.5.
 *
 * \name Blinky_LED_1_KIT_TC275_LK
 * \version V1.0.2
 * \board AURIX TC275 lite Kit, KIT_AURIX_TC275_LITE, TC27xTP_D-Step
 * \keywords AURIX, Blinky_LED_1, Blinky, LED, Lite
 * \documents https://www.infineon.com/aurix-expert-training/Infineon-AURIX_Blinky_LED_1_KIT_TC275_LK-TR-v01_00_02-EN.pdf
 * \documents https://www.infineon.com/aurix-expert-training/TC27D_iLLD_UM_1_0_1_12_0.chm
 * \lastUpdated 2021-06-29
 *********************************************************************************************************************/
#include "Ifx_Types.h"
#include "IfxCpu.h"
#include "IfxScuWdt.h"
#include "Blinky_LED.h"

IfxCpu_syncEvent g_cpuSyncEvent = 0;//用于事件同步

int core0_main(void)
{
    IfxCpu_enableInterrupts();
    
    /* !!WATCHDOG0 AND SAFETY WATCHDOG ARE DISABLED HERE!!
     * Enable the watchdogs and service them periodically if it is required
     */
    IfxScuWdt_disableCpuWatchdog(IfxScuWdt_getCpuWatchdogPassword());
    IfxScuWdt_disableSafetyWatchdog(IfxScuWdt_getSafetyWatchdogPassword());
    
    /* Wait for CPU sync event 等待CPU进行事件同步*/
    IfxCpu_emitEvent(&g_cpuSyncEvent);		//CPU发起事件
    IfxCpu_waitEvent(&g_cpuSyncEvent, 1);	//等待事件
    
    initLED();  /* Initialize the LED port pin      */

    while(1)
    {
        blinkLED(); /* Make the LED blink           */
    }
    return (1);//返回1，也是我没想到的
}

IfxCpu.h

CPU基本功能

如：

CPU状态模式

/** \addtogroup IfxLld_Cpu_Std_Enum
 * \{ */
/** \brief Enumeration for the Cpu mode
 */
typedef enum
{
    IfxCpu_CoreMode_halt,//挂起
    IfxCpu_CoreMode_run,//运行
    IfxCpu_CoreMode_idle,//待机
    IfxCpu_CoreMode_sleep,//睡眠
    IfxCpu_CoreMode_stby,//？
    IfxCpu_CoreMode_unknown//未知
} IfxCpu_CoreMode;

先去看看手册，有些功能不是很懂