/*
 * ESPRESSIF MIT License
 *
 * Copyright (c) 2015 <ESPRESSIF SYSTEMS (SHANGHAI) PTE LTD>
 *
 * Permission is hereby granted for use on ESPRESSIF SYSTEMS ESP8266 only, in which case,
 * it is 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 "esp_common.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "pwm.h"

#define PWM_0_OUT_IO_MUX   PERIPHS_IO_MUX_MTDI_U
#define PWM_0_OUT_IO_NUM   12
#define PWM_0_OUT_IO_FUNC  FUNC_GPIO12

#define PWM_1_OUT_IO_MUX   PERIPHS_IO_MUX_MTCK_U
#define PWM_1_OUT_IO_NUM   13
#define PWM_1_OUT_IO_FUNC  FUNC_GPIO13

#define PWM_2_OUT_IO_MUX   PERIPHS_IO_MUX_MTMS_U
#define PWM_2_OUT_IO_NUM   14
#define PWM_2_OUT_IO_FUNC  FUNC_GPIO14

#define PWM_3_OUT_IO_MUX   PERIPHS_IO_MUX_MTDO_U
#define PWM_3_OUT_IO_NUM   15
#define PWM_3_OUT_IO_FUNC  FUNC_GPIO15

//PWM period 500us(2Khz)
#define PWM_PERIOD    (500)

/******************************************************************************
 * FunctionName : user_rf_cal_sector_set
 * Description  : SDK just reversed 4 sectors, used for rf init data and paramters.
 *                We add this function to force users to set rf cal sector, since
 *                we don't know which sector is free in user's application.
 *                sector map for last several sectors : ABCCC
 *                A : rf cal
 *                B : rf init data
 *                C : sdk parameters
 * Parameters   : none
 * Returns      : rf cal sector
*******************************************************************************/
uint32 user_rf_cal_sector_set(void)
{
    flash_size_map size_map = system_get_flash_size_map();
    uint32 rf_cal_sec = 0;

    switch (size_map) {
        case FLASH_SIZE_4M_MAP_256_256:
            rf_cal_sec = 128 - 5;
            break;

        case FLASH_SIZE_8M_MAP_512_512:
            rf_cal_sec = 256 - 5;
            break;

        case FLASH_SIZE_16M_MAP_512_512:
        case FLASH_SIZE_16M_MAP_1024_1024:
            rf_cal_sec = 512 - 5;
            break;

        case FLASH_SIZE_32M_MAP_512_512:
        case FLASH_SIZE_32M_MAP_1024_1024:
            rf_cal_sec = 1024 - 5;
            break;
        case FLASH_SIZE_64M_MAP_1024_1024:
            rf_cal_sec = 2048 - 5;
            break;
        case FLASH_SIZE_128M_MAP_1024_1024:
            rf_cal_sec = 4096 - 5;
            break;
        default:
            rf_cal_sec = 0;
            break;
    }

    return rf_cal_sec;
}
/******************************************************************************
 * FunctionName : user_init
 * Description  : entry of user application, init user function here
 * Parameters   : none
 * Returns      : none
*******************************************************************************/

//pwm out_put io
uint32 io_info[][3] = { 
    { PWM_0_OUT_IO_MUX, PWM_0_OUT_IO_FUNC, PWM_0_OUT_IO_NUM },
    { PWM_1_OUT_IO_MUX, PWM_1_OUT_IO_FUNC, PWM_1_OUT_IO_NUM },
    { PWM_2_OUT_IO_MUX, PWM_2_OUT_IO_FUNC, PWM_2_OUT_IO_NUM },
    { PWM_3_OUT_IO_MUX, PWM_3_OUT_IO_FUNC, PWM_3_OUT_IO_NUM },
};

//dutys table
uint32 dutys[][4] = { 
    {250, 250, 250, 250},
};

//phase table
int phase[][4] = {
    {0, 0, 50, -50},
};

void user_init(void)
{
    printf("SDK version:%s\n", system_get_sdk_version());
    pwm_init(PWM_PERIOD, dutys[0], 4, io_info);
    pwm_set_channel_reverse(0x1<<0);
    pwm_set_phases(phase[0]);
    pwm_start();
    int count = 0;
    while(1) {
        if(count == 20) {
            //channel0, 1 output hight level.
            //channel2, 3 output low level.
            pwm_stop(0x3);
            printf("PWM stop\n");
        } else if(count == 30){
            pwm_start();
            printf("PWM re-start\n");
            count = 0;
        }
        count++;
        vTaskDelay(1000 / portTICK_RATE_MS);
    }
}