I2CTargetMSPM0.h

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/*!****************************************************************************
 *  @file       I2CTargetMSPM0.h
 *
 *  @brief      I2CTarget driver implementation for a MSPM0 device I2C
 *              target.
 *
 *  @defgroup   I2CTargetMSPM0 I2C driver APIs
 *
 *  @note       All calls should go through the generic I2CTarget API.
 *
 *  # Driver Include #
 *  The I2CTarget header file should be included in an application as follows:
 *  @code
 *  #include <ti/drivers/I2CTarget.h>
 *  #include <ti/drivers/i2c/I2CTargetMSPM0.h>
 *  @endcode
 *
 *  Refer to @ref I2CTarget.h for a complete description of APIs.
 *
 *  # Overview
 *  The generic I2CTarget API is normally used in application code,
 *  for example, @ref I2CTarget_open(). Do not use APIs in this header file
 *  directly. The board file will define the device specific config, and casting
 *  in the general API will ensure that the correct device specific functions
 *  are called.
 *
 *  ## General Behavior
 *  Before using the I2C in MSPM0:
 *   - The I2CTarget driver is initialized by calling I2CTarget_init().
 *   - The I2C HW is configured and system dependencies are declared (e.g. IOs,
 *     power, etc.) by calling I2CTarget_open().
 *   - The I2CTarget driver starts acting on I2C bus activities after calling
 *     @ref I2CTarget_start().
 *
 *  ## Power Management
 *  The Power drivers are yet to implement but the behavior should follow like the information given here.
 *  The I2CTargetMSPM0 driver sets a power constraint when @ref I2CTarget_start()
 *  is called to keep the device out of standby; so when all tasks are blocked, the device will
 *  enter idle mode instead of standby. When the application calls @ref I2CTarget_stop(), the
 *  the power constraint to prohibit standby is released.
 *  The following statements are valid:
 *    - After I2CTarget_open() call: I2C peripheral is enabled in target mode, but the device can
 *      enter standby. The device will need to be woken up (for example on GPIO or timer events)
 *      before I2C bus activity can be processed.
 *    - After I2CTarget_start() call: I2C events will trigger the user callback function. The device
 *      might enter idle, but not standby.
 *    - After I2C_stop() call: Same as after I2CTarget_open() call.
 *    - After I2C_close() call: I2C peripheral is disabled.
 *
 * ## Supported Functions
 *  @note All calls should go through the generic API.
 *
 *  @anchor ti_drivers_I2CTARGETMSPM0_USE_CASES
 *  # Use Cases
 *  See generic API for examples.
 *
 ******************************************************************************
 */
/* clang-format off */

#ifndef ti_drivers_I2CTargetMSPM0__include
#define ti_drivers_I2CTargetMSPM0__include

#include <stdint.h>
#include <stdbool.h>

#include <ti/driverlib/dl_i2c.h>
#include <ti/drivers/I2CTarget.h>

#ifdef POWER_MANAGEMENT_MSPM0
#include <ti/drivers/Power.h>
#endif

#ifdef __cplusplus
extern "C" {
#endif

typedef struct
{
    I2CTARGET_BASE_HWATTRS 
    /* SDA pin PINCM index and mux */
    uint8_t sdaPincm; 
    uint8_t sdaPinIndex;  
    uint32_t sdaPinMux;   
    /* SCL pin PINCM index and mux */
    uint8_t sclPincm;    
    uint8_t sclPinIndex; 
    uint32_t sclPinMux;  
#ifdef POWER_MANAGEMENT_MSPM0
    /* I2C peripheral's Power driver ID */
    PowerMSPM0_Resource powerMngrId;
#endif
    DL_I2C_CLOCK clockSource; 
    DL_I2C_CLOCK_DIVIDE clockDivider; 
    DL_I2C_RX_FIFO_LEVEL rxIntFifoThr; 
    DL_I2C_TX_FIFO_LEVEL txIntFifoThr; 
    bool isClockStretchingEnabled; 
    bool isAnalogGlitchFilterEnabled; 
    uint16_t i2cClk;               
} I2CTargetMSPM0_HWAttrs;

typedef struct
{
    I2CTARGET_BASE_OBJECT
#ifdef POWER_MANAGEMENT_MSPM0
    /* I2C power notification */
    void *i2cPostFxn;
    Power_NotifyObj i2cPostObj;
#endif
} I2CTargetMSPM0_Object;

static bool I2CBaseValid(I2C_Regs *i2c)
{
    return ((i2c == (I2C_Regs *) I2C0_BASE)||(i2c == (I2C_Regs *) I2C1_BASE));
}

#define I2CTARGET_INT_FLAGS (   DL_I2C_INTERRUPT_TARGET_TXFIFO_EMPTY | \
                                DL_I2C_INTERRUPT_TARGET_RX_DONE | \
                                DL_I2C_INTERRUPT_TARGET_TXFIFO_TRIGGER | \
                                DL_I2C_INTERRUPT_TARGET_RXFIFO_TRIGGER | \
                                DL_I2C_INTERRUPT_TARGET_START | \
                                DL_I2C_INTERRUPT_TARGET_STOP)

#ifdef __cplusplus
}
#endif

#endif /* ti_drivers_I2CTargetMSPM0__include */
/* clang-format on */