lpc_sys.h

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/*
 *     SocialLedge.com - Copyright (C) 2013
 *
 *     This file is part of free software framework for embedded processors.
 *     You can use it and/or distribute it as long as this copyright header
 *     remains unmodified.  The code is free for personal use and requires
 *     permission to use in a commercial product.
 *
 *      THIS SOFTWARE IS PROVIDED "AS IS".  NO WARRANTIES, WHETHER EXPRESS, IMPLIED
 *      OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
 *      MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.
 *      I SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR
 *      CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
 *
 *     You can reach the author of this software at :
 *          p r e e t . w i k i @ g m a i l . c o m
 */

#ifndef LPC_SYS_H__
#define LPC_SYS_H__
#ifdef __cplusplus
extern "C" {
#endif
#include <stdint.h>
#include <stdbool.h>

#include "LPC17xx.h"
#include "fault_registers.h"
#include "rtc.h"
#include "sys_config.h"



typedef enum {
    boot_unknown  = 0,
    boot_power_on = 1,      
    boot_reset    = 2,      
    boot_watchdog = 4,      
    boot_watchdog_recover,  
    boot_brown_out          
} sys_boot_t;

typedef struct
{
    uint32_t used_global; 
    uint32_t used_heap;   
    uint32_t avail_heap;  
    uint32_t avail_sys;   

    uint32_t num_sbrk_calls;  
    uint32_t last_sbrk_size;  
    void*    last_sbrk_ptr;   
    void*    next_malloc_ptr; 
} sys_mem_t;

typedef void (*void_func_t)(void);

typedef char (*char_func_t)(char);



sys_boot_t sys_get_boot_type();  
rtc_t      sys_get_boot_time();  

void sys_set_outchar_func(char_func_t func);

void sys_set_inchar_func(char_func_t func);
void lpc_sys_setup_system_timer(void);

uint64_t sys_get_uptime_us(void);

static inline uint64_t sys_get_uptime_ms(void) { return sys_get_uptime_us() / 1000; }



sys_mem_t sys_get_mem_info();

void sys_get_mem_info_str(char buffer[280]);



static inline void sys_watchdog_feed()
{
    LPC_WDT->WDFEED = 0xAA;
    LPC_WDT->WDFEED = 0x55;
}

static inline void sys_reboot()
{
    LPC_WDT->WDFEED = 0xAA;
    LPC_WDT->WDMOD = 0;
}

static inline void sys_reboot_abnormal(void)
{
    FAULT_EXISTS = FAULT_PRESENT_VAL;
    sys_reboot();
}

static inline void sys_watchdog_enable()
{
    LPC_WDT->WDTC = SYS_CFG_WATCHDOG_TIMEOUT_MS * 1000;

    #if(DEBUG)
        LPC_WDT->WDMOD = 2;
    #else
        LPC_WDT->WDMOD = 3;
    #endif
    sys_watchdog_feed();
}



#ifdef __cplusplus
}
#endif
#endif /* LPC_SYS_H__ */