T32CM11_wdog.h

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#ifndef T32CM11_WDOG_H_
#define T32CM11_WDOG_H_
 
#include "tr_hal_platform.h"
 
 
 
#define CHIP_MEMORY_MAP_WDOG_BASE     (0xA0900000UL) 
 
 
typedef struct
{
    // this is the value the watchdog timer starts at, and counts down from
    __IO  uint32_t   initial_value;         // 0x00
 
    // this is the CURRENT value of the timer
    __IO  uint32_t   current_value;         // 0x04
 
    // this enables the wdog, interrupt, reset, prescalar and can lock settings
    __IO  uint32_t   control;               // 0x08
 
    // write 0x0000A5A5 to pet the watchdog and reset the counter to initial value
    __IO  uint32_t   reset_watchdog;        // 0x0C
 
    // this counts wdog resets up to 255
    __IO  uint32_t   reset_counter;         // 0x10
 
    // clears active interrupt
    __IO  uint32_t   interrupt_clear;       // 0x14
 
    // when current value gets to this value the interrupt will fire
    __IO  uint32_t   interrupt_on_value;    // 0x18
 
    // there needs to be at least this much time passed before the wdog timer can be reset
    __IO  uint32_t   min_time_before_reset; // 0x18
 
} WDOG_REGISTERS_T;
 
// *****************************************************************
// these defines help when dealing with the INITIAL VALUE (0x00)
 
// we set the minimum value to be at least 1 second
// if we are using a prescalar of 1024
#define TR_HAL_WDOG_MINIMUM_INITIAL_VALUE 40000
 
 
// *****************************************************************
// these defines help when dealing with the CONTROL REGISTER (0x08)
 
// bit 1 = lockout bit (disables changes when set)
#define TR_HAL_WDOG_CTRL_LOCKOUT            0x01
// bits 2,3,4 = clock prescalar
#define TR_HAL_WDOG_CTRL_CLK_PRESCALAR_1    0x00
#define TR_HAL_WDOG_CTRL_CLK_PRESCALAR_16   0x04
#define TR_HAL_WDOG_CTRL_CLK_PRESCALAR_256  0x08
#define TR_HAL_WDOG_CTRL_CLK_PRESCALAR_32   0x0C
#define TR_HAL_WDOG_CTRL_CLK_PRESCALAR_128  0x10
#define TR_HAL_WDOG_CTRL_CLK_PRESCALAR_1024 0x14
#define TR_HAL_WDOG_CTRL_CLK_PRESCALAR_4096 0x18
// need to test this and see if it is really the same result as 0x18
#define TR_HAL_WDOG_CTRL_CLK_PRESCALAR_ALSO_4096  0x1C
// bit 5 = reset enabled
#define TR_HAL_WDOG_CTRL_RESET_ENABLED      0x20
#define TR_HAL_WDOG_CTRL_RESET_DISABLED     0x00
// bit 6 = interrupt enabled
#define TR_HAL_WDOG_CTRL_INTERRUPT_ENABLED  0x40
#define TR_HAL_WDOG_CTRL_INTERRUPT_DISABLED 0x00
// bit 7 = watchdog enabled
#define TR_HAL_WDOG_CTRL_TIMER_ENABLED      0x80
#define TR_HAL_WDOG_CTRL_TIMER_DISABLED     0x00
 
 
// *****************************************************************
// these defines help when dealing with the RESET WATCHDOG REGISTER (0x0C)
#define TR_HAL_WDOG_RESET_WATCHDOG_VALUE 0xA5A5
 
// *****************************************************************
// these defines help when dealing with the RESET_COUNTER REGISTER (0x10)
#define TR_HAL_WDOG_CLEAR_RESET_COUNTER 0x01
 
// *****************************************************************
// these defines help when dealing with the INTERRUPT CLEAR REGISTER (0x14)
#define TR_HAL_WDOG_CLEAR_INTERRUPT 0x01
 
// *****************************************************************
// these defines help when dealing with the MIN TIME BEFORE RESET REGISTER (0x18)
#define TR_HAL_WDOG_DEFAULT_MIN_TIME_BEFORE_RESET 0
 
 
// *****************************************************************
// this orients the WDOG_REGISTERS struct with the correct address
// so referencing a field will now read/write the correct WDOG
// register chip address 
#define WDOG_REGISTERS ((WDOG_REGISTERS_T *) CHIP_MEMORY_MAP_WDOG_BASE)
 
 
typedef enum
{
    TR_HAL_WDOG_CLK_PRESCALAR_1    = TR_HAL_WDOG_CTRL_CLK_PRESCALAR_1,
    TR_HAL_WDOG_CLK_PRESCALAR_16   = TR_HAL_WDOG_CTRL_CLK_PRESCALAR_16,
    TR_HAL_WDOG_CLK_PRESCALAR_256  = TR_HAL_WDOG_CTRL_CLK_PRESCALAR_256,
    TR_HAL_WDOG_CLK_PRESCALAR_32   = TR_HAL_WDOG_CTRL_CLK_PRESCALAR_32,
    TR_HAL_WDOG_CLK_PRESCALAR_128  = TR_HAL_WDOG_CTRL_CLK_PRESCALAR_128,
    TR_HAL_WDOG_CLK_PRESCALAR_1024 = TR_HAL_WDOG_CTRL_CLK_PRESCALAR_1024,
    TR_HAL_WDOG_CLK_PRESCALAR_4096 = TR_HAL_WDOG_CTRL_CLK_PRESCALAR_4096,
 
} tr_hal_wdog_prescalar_t;
 
 
 
// value to set for the wdog timer to get one second
// needs to be paired with correct prescalar
#define TR_HAL_WDOG_1_SECOND_TIMER_VALUE 40000
 
// value to set for the prescalar  to get one second
// needs to be paired with correct timer value
#define TR_HAL_WDOG_1_SECOND_PRESCALAR_VALUE TR_HAL_WDOG_CLK_PRESCALAR_1024
 
 
WDOG_REGISTERS_T* tr_hal_wdog_get_register_address(void);
 
#define TR_HAL_WDOG_EVENT_INT_TRIGGERED          0x00000001
 
typedef void (*tr_hal_wdog_event_callback_t) (uint32_t event_bitmask);
 
typedef struct
{
    // **** basic watchdog settings ****
    
    // if this is FALSE nothing else matters, watchdog is DISABLED
    bool watchdog_enabled;
    
    // do we reset when timer hits zero?
    bool reset_enabled;
 
    // initial time and clock prescalar - relates to how fast the timer runs down
    tr_hal_wdog_prescalar_t clock_prescalar;
    uint32_t                initial_value;
 
 
    // **** advanced watchdog settings ****
 
    // should we clear reset counter when initialized
    bool clear_reset_counter_on_init;
    
    // are settings locked
    bool lockout_enabled;
 
    // can configure a minimum time before a second timer reset will work
    uint32_t min_time_before_reset;
 
 
    // **** interrupt settings ****
 
    // if we want to enable an interrupt we also set the time when tyhe interrupt fires
    // when the watchdog timer gets to this time, the interrupt fires
    bool     interrupt_enabled;
    uint32_t interrupt_time_value;
 
    // set the INT priority
    tr_hal_int_pri_t interrupt_priority;
 
    // event callback from HAL to App when the watchdog interrupt
    // if the app doesn't want this, then set it to NULL
    tr_hal_wdog_event_callback_t  event_handler_fx;
 
} tr_hal_wdog_settings_t;
 
 
#define DEFAULT_WDOG_CONFIG                                 \
    {                                                       \
        .watchdog_enabled = true,                           \
        .reset_enabled = true,                              \
        .clock_prescalar = TR_HAL_WDOG_1_SECOND_PRESCALAR_VALUE,  \
        .initial_value = (6 * TR_HAL_WDOG_1_SECOND_TIMER_VALUE),  \
        .clear_reset_counter_on_init = false,               \
        .lockout_enabled = false,                           \
        .min_time_before_reset = TR_HAL_WDOG_DEFAULT_MIN_TIME_BEFORE_RESET,\
        .interrupt_enabled = false,                         \
        .interrupt_time_value = 0,                          \
        .interrupt_priority = TR_HAL_INTERRUPT_PRIORITY_5,  \
        .event_handler_fx = NULL,                           \
    }
 
 
 
 
#endif // T32CM11_WDOG_H_