/*!
 * \file      sx1262mbxcas-board.c
 *
 * \brief     Target board SX1262MBXCAS shield driver implementation
 *
 * \copyright Revised BSD License, see section \ref LICENSE.
 *
 * \code
 *                ______                              _
 *               / _____)             _              | |
 *              ( (____  _____ ____ _| |_ _____  ____| |__
 *               \____ \| ___ |    (_   _) ___ |/ ___)  _ \
 *               _____) ) ____| | | || |_| ____( (___| | | |
 *              (______/|_____)_|_|_| \__)_____)\____)_| |_|
 *              (C)2013-2017 Semtech
 *
 * \endcode
 *
 * \author    Miguel Luis ( Semtech )
 *
 * \author    Gregory Cristian ( Semtech )
 */
#include <stdlib.h>
#include "project_config.h"
#include "delay.h"
#include "radio.h"
#include "sx126x-board.h"
#include "HAL_SPI.h"
#include "stdio.h"

typedef struct __softTimer_s{
	uint8_t isRun;		//0停止，1运行
	uint32_t delayMs;	//定时器需要多长时间后唤醒
	uint32_t startMs;	//定时器开始时间
}SoftTimer_t;

static DioIrqHandler *dio1IrqCallback=NULL;	//记录DIO1的回调函数句柄
static uint32_t timer_count=0;
static SoftTimer_t txTimerHandle,rxTimerHandle;

/* 初始化sx126x需要用到的GPIO初始化，将 BUSY 引脚设置为输入模式
 */
void SX126xIoInit( void )
{
	uint8_t u8_ret=255;
	GPIO_InitTypeDef  GPIO_InitStructure;

	//初始化BUSY为上拉输入模式
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB|RCC_APB2Periph_GPIOC|RCC_APB2Periph_GPIOE, ENABLE);	    //使能指定端口时钟
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;	 //IO口速度为50MHz，这里不用传参，直接写死用最大速度50MHZ
	GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IPU;//上拉输入
	GPIO_InitStructure.GPIO_Pin = RADIO_DIO4_BUSY_PIN;
	GPIO_Init(RADIO_DIO4_BUSY_PORT, &GPIO_InitStructure);	//初始化GPIO
	
	//下面这几个引脚没用用到，设置为浮空输入模式
	GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING;//浮空输入
	
	GPIO_InitStructure.GPIO_Pin = RADIO_DIO0_TXEN_PIN;
	GPIO_Init(RADIO_DIO0_TXEN_PORT, &GPIO_InitStructure);	//初始化GPIO

	GPIO_InitStructure.GPIO_Pin = RADIO_DIO2_PIN;
	GPIO_Init(RADIO_DIO2_PORT, &GPIO_InitStructure);	//初始化GPIO
	
	GPIO_InitStructure.GPIO_Pin = RADIO_DIO3_PIN;
	GPIO_Init(RADIO_DIO3_PORT, &GPIO_InitStructure);	//初始化GPIO
	
	GPIO_InitStructure.GPIO_Pin = RADIO_DIO5_RXEN_PIN;
	GPIO_Init(RADIO_DIO5_RXEN_PORT, &GPIO_InitStructure);	//初始化GPIO
	
	u8_ret=Spi1Init();
	if(u8_ret){
		printf("spi1 init error\r\n");
	}else{
		printf("SX126xIoInit init sucess\r\n");
	}
}

/* 初始化 DIO1
 * 将DIO1设置为外部中断(上升沿触发)，并且回调函数为 dioIrq 函数原型 void RadioOnDioIrq( void* context )
 */
void SX126xIoIrqInit( DioIrqHandler dioIrq )
{
	GPIO_InitTypeDef  GPIO_InitStructure;
	EXTI_InitTypeDef EXTI_InitStructure;
 	NVIC_InitTypeDef NVIC_InitStructure;
	
	dio1IrqCallback=dioIrq;
	
	//gpio(DIO1)初始化为下拉输入模式
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOE|RCC_APB2Periph_GPIOB, ENABLE);	    //使能指定端口时钟
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;	 //IO口速度为50MHz，这里不用传参，直接写死用最大速度50MHZ
	GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IPD;//下拉输入
	GPIO_InitStructure.GPIO_Pin = RADIO_DIO1_PIN;
	GPIO_Init(RADIO_DIO1_PORT, &GPIO_InitStructure);	//初始化GPIO
	
	//中断配置
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);	//使能复用功能时钟
	//GPIOE.2 中断线以及中断初始化配置   上升沿触发
  GPIO_EXTILineConfig(GPIO_PortSourceGPIOE, GPIO_PinSource8);
	EXTI_InitStructure.EXTI_Line=EXTI_Line8;
	EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;	
	EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;	//上升沿触发
	EXTI_InitStructure.EXTI_LineCmd = ENABLE;
	EXTI_Init(&EXTI_InitStructure);	 	//根据EXTI_InitStruct中指定的参数初始化外设EXTI寄存器

	//设置中断优先级
	NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn;			//使能按键WK_UP所在的外部中断通道
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x02;	//抢占优先级2， 
	NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x03;					//子优先级3
	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;								//使能外部中断通道
	NVIC_Init(&NVIC_InitStructure);
	EXTI_ClearITPendingBit(EXTI_Line8);  //清除LINE11上的中断标志位 
}

//在中断回调函数中回调 void SX126xIoIrqInit( DioIrqHandler dioIrq ) 中注册的 dioIrq 回调
void EXTI9_5_IRQHandler(void){
//	printf("enter irq\r\n");
	if(GPIO_ReadInputDataBit(RADIO_DIO1_PORT,RADIO_DIO1_PIN)){
//		printf("DIO1 irq\r\n");
		if(NULL!=dio1IrqCallback){
			dio1IrqCallback(NULL);
		}
		EXTI_ClearITPendingBit(EXTI_Line8);//清除中断标志位
	}
}

void SX126xIoDeInit( void )
{
    //GPIO去初始化代码
}

//复位按键功能
void SX126xReset( void )
{
	GPIO_InitTypeDef  GPIO_InitStructure;

	SX126xDelayMs( 10 );
	
	//将RST输出低电平
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);	    //使能指定端口时钟
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;	 //IO口速度为50MHz，这里不用传参，直接写死用最大速度50MHZ
	GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP;	//推挽输出
	GPIO_InitStructure.GPIO_Pin = RADIO_nRESET_PIN;
	GPIO_Init(RADIO_nRESET_PORT, &GPIO_InitStructure);	//初始化GPIO
	GPIO_WriteBit( RADIO_nRESET_PORT, RADIO_nRESET_PIN,Bit_RESET);	//RST设为低电平输出
	
	SX126xDelayMs( 20 );
	
	//将RST设置为上拉输入模式
	GPIO_WriteBit( RADIO_nRESET_PORT, RADIO_nRESET_PIN,Bit_SET);	//RST设为低电平输出
	GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IPU;
	GPIO_Init(RADIO_nRESET_PORT, &GPIO_InitStructure);	//初始化GPIO
	
	SX126xDelayMs( 10 );
}

//读取Busy引脚电平状态
void SX126xWaitOnBusy( void )
{
	uint32_t u32_count=0;
	
	while( GPIO_ReadInputDataBit(RADIO_DIO4_BUSY_PORT,RADIO_DIO4_BUSY_PIN) == 1 ){
		if(u32_count++>1000){
			printf("wait busy pin timeout\r\n");
			u32_count=0;
		}
		SX126xDelayMs(1);
	}
}

//设置SPI的NSS引脚电平，0低电平，非零高电平
void SX126xSetNss(uint8_t lev ){
	if(lev){
		GPIO_SetBits(RADIO_NSS_PORT,RADIO_NSS_PIN);	//输出高电平
	}else{
		GPIO_ResetBits(RADIO_NSS_PORT,RADIO_NSS_PIN);	//输出低电平
	}
}

//spi传输一个字节的数据
uint8_t SX126xSpiInOut(uint8_t data){
	return HALSpi1InOut(data);
}

//检查频率是否符合要求，如果不需要判断则可以直接返回true
bool SX126xCheckRfFrequency( uint32_t frequency )
{
    // Implement check. Currently all frequencies are supported
    return true;
}

//毫秒延时
void SX126xDelayMs(uint32_t ms){
	delay_ms(ms);
}

//tx/rx定时器操作

//定时器3中断服务程序
//tx定时结束需要回调 RadioOnTxTimeoutIrq
//rx定时结束需要回调 RadioOnRxTimeoutIrq
void TIM3_IRQHandler(void)   //TIM3中断
{
	uint32_t diffMs=0;
	
	if (TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET){
		timer_count++;
		TIM_ClearITPendingBit(TIM3, TIM_IT_Update  );  //清除TIMx更新中断标志
		//printf("\r\n timer 3 IrqErrorCode_t\r\n");
		//printf("timer_count=%d\r\n",timer_count);
		
		//处理tx定时器
		if(txTimerHandle.isRun){
			if(timer_count>=txTimerHandle.startMs){
				diffMs=timer_count-txTimerHandle.startMs;
			}else{//溢出了
				diffMs=0xffffffff - txTimerHandle.startMs + timer_count;
			}
			if(diffMs>txTimerHandle.delayMs){
				//计时结束
				//printf("----------------- tx timer irq ---------------\r\n");
				SX126xTxTimerStop();
				txTimerHandle.startMs=timer_count;
				RadioOnTxTimeoutIrq(NULL);	//tx定时结束需要回调 RadioOnTxTimeoutIrq
			}
		}
		
		//处理rx定时器
		if(rxTimerHandle.isRun){
			if(timer_count>=rxTimerHandle.startMs){
				diffMs=timer_count-rxTimerHandle.startMs;
			}else{//溢出了
				diffMs=0xffffffff - rxTimerHandle.startMs + timer_count;
			}
			if(diffMs>rxTimerHandle.delayMs){
				//计时结束
				//printf("----------------- rx timer irq ---------------\r\n");
				SX126xRxTimerStop();
				rxTimerHandle.startMs=timer_count;
				RadioOnRxTimeoutIrq(NULL);	//rx定时结束需要回调 RadioOnRxTimeoutIrq
			}
		}
	}
}

//初始化定时器(这里用TIM3定时器模拟出了两个ms定时器)
//tx定时结束需要回调 RadioOnTxTimeoutIrq
//rx定时结束需要回调 RadioOnRxTimeoutIrq
void SX126xTimerInit(void){
	TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
	NVIC_InitTypeDef NVIC_InitStructure;

	//使能TIM3
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); //时钟使能
 
	//TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE ); //使能指定的TIM3中断,允许更新中断

	//中断优先级NVIC设置
	NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;  //TIM3中断
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;  //先占优先级0级
	NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;  //从优先级3级
	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道被使能
	NVIC_Init(&NVIC_InitStructure);  //初始化NVIC寄存器
	
	//定时器TIM3初始化
	TIM_TimeBaseStructure.TIM_Period = 10; //设置在下一个更新事件装入活动的自动重装载寄存器周期的值	
	TIM_TimeBaseStructure.TIM_Prescaler =SystemCoreClock/10000; //设置用来作为TIMx时钟频率除数的预分频值(1s10000次，也就是1次0.1ms)
	TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //设置时钟分割:TDTS = Tck_tim
	TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //TIM向上计数模式
	TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); //根据指定的参数初始化TIMx的时间基数单位
	
	//关闭软件定时器
	txTimerHandle.isRun=0;
	rxTimerHandle.isRun=0;
	
	TIM_Cmd(TIM3, ENABLE);  //使能TIMx
	TIM_ClearITPendingBit(TIM3, TIM_IT_Update  );  //清除TIMx更新中断标志
	TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE ); //使能指定的TIM2中断,允许更新中断
}

void SX126xSetTxTimerValue(uint32_t nMs){
	//printf("[%s()-%d]set timer out %d ms\r\n",__func__,__LINE__,nMs);
	txTimerHandle.delayMs=nMs;
}

void SX126xTxTimerStart(void){
	//printf("[%s()-%d]start timer\r\n",__func__,__LINE__);
	txTimerHandle.startMs=timer_count;
	txTimerHandle.isRun=1;
}

void SX126xTxTimerStop(void){
	//printf("[%s()-%d]stop timer\r\n",__func__,__LINE__);
	txTimerHandle.isRun=0;
}

void SX126xSetRxTimerValue(uint32_t nMs){
	//printf("[%s()-%d]set timer out %d ms\r\n",__func__,__LINE__,nMs);
	rxTimerHandle.delayMs=nMs;
}

void SX126xRxTimerStart(void){
	//printf("[%s()-%d]start timer\r\n",__func__,__LINE__);
	rxTimerHandle.startMs=timer_count;
	rxTimerHandle.isRun=1;
}

void SX126xRxTimerStop(void){
	//printf("[%s()-%d]stop timer\r\n",__func__,__LINE__);
	rxTimerHandle.isRun=0;
}