system.h

/*
 * MIT License
 *
 * Copyright (c) 2020 Joey Castillo
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
 
#include <stdint.h>
#include <stdbool.h>
#include <stddef.h>
#include "sam.h"
 
#pragma once
 
#if __EMSCRIPTEN__
 
typedef int tc_instance_details_t;
typedef int tcc_instance_details_t;
typedef int sercom_instance_details_t;
 
#else
 
typedef struct {
    Tc* tc;
    uint32_t clock_enable_mask;
    uint8_t gclk_id;
} tc_instance_details_t;
 
typedef struct {
    Tcc* tcc;
    uint32_t clock_enable_mask;
    uint8_t gclk_id;
} tcc_instance_details_t;
 
typedef struct {
    Sercom* sercom;
    uint32_t clock_enable_mask;
    uint8_t gclk_id;
    uint8_t interrupt_line;
} sercom_instance_details_t;
 
#endif
 
extern const tc_instance_details_t TC_Peripherals[];
extern const uint8_t Num_TC_Instances;
extern const uint8_t TC_First_Index;
 
extern const tcc_instance_details_t TCC_Peripherals[];
extern const uint8_t Num_TCC_Instances;
 
extern const sercom_instance_details_t SERCOM_Peripherals[];
extern const uint8_t Num_SERCOM_Instances;
 
 
void sys_init(void);
 
uint32_t get_cpu_frequency(void);
 
bool set_cpu_frequency(uint32_t freq);
 
void _enable_48mhz_gclk1(void);
 
void _enter_standby_mode(void);