#include "includes.h"

// Modbus(RS485接口）工作模式：单向发送，向上位机发送数据, 每30秒向上位机发送一个心跳。

// modbus通讯处理
#pragma pack(push, 1)

// RF串口发送帧的循环缓冲
#define MODBUS_SENDM_DATA_COUNT 512
loopbuff_t Modbus_SendM;
uint8_t Modbus_SendM_Data[sizeof(ext_data_t) * (MODBUS_SENDM_DATA_COUNT + 1)] = {0};
// RF串口接收的消息通知
SemaphoreHandle_t	   Modbus_SendQ = NULL;    // 二值信号量句柄

#pragma pack(pop)

// 发送心跳报文缓冲
#define HEART_SENDBUFF_SIZE 64
uint8_t Heart_sendBuff[HEART_SENDBUFF_SIZE];

// 发送数据报文缓冲
uint8_t Modbus_sendBuff[TASK_SENDBUFF_SIZE];

static void RS485_SendDataByte(uint8_t *pu8TxBuf, uint32_t u32WriteBytes)
{
    /* Send data */
    UART_Transmit(&huart4, pu8TxBuf, u32WriteBytes);
}

void Modbus_Open()
{
	// 创建消息队列
	LoopBuff_Create(&Modbus_SendM, sizeof(ext_data_t), MODBUS_SENDM_DATA_COUNT, 0, (uint32_t) Modbus_SendM_Data);

	// 创建信号量
	Modbus_SendQ = xSemaphoreCreateBinary();
}

uint8_t pack_heart_send_data()
{
	uint8_t i;
	uint16_t crc;
	
	// 打包上报数据（按modbus从机响应的格式）
	memset(Heart_sendBuff, 0, HEART_SENDBUFF_SIZE);
	i = 0;
	
	// PSN
	memmove(Heart_sendBuff + i, dcBuff.configBottle.PSN, 6);
	i += 6;
	
	Heart_sendBuff[i++] = 0x02;	// 命令码：心跳

	// 数据长度：先预设为0，最后再修改，位置为Heart_sendBuff[7]
	Heart_sendBuff[i++] = 0;
	
	// 硬件版本
	Heart_sendBuff[i++] = dcBuff.powerInfo.hardVer.minor;
	// 软件版本
	Heart_sendBuff[i++] = dcBuff.powerInfo.softVer.minor;
	// 软件日期
	Heart_sendBuff[i++] = dcBuff.powerInfo.softDate.year;
	Heart_sendBuff[i++] = dcBuff.powerInfo.softDate.month;
	Heart_sendBuff[i++] = dcBuff.powerInfo.softDate.day;

	// 射频自检状态
	Heart_sendBuff[i++] = RF_initStatus;
	// 网口自检状态
	Heart_sendBuff[i++] = Ethernet_initStatus;
	// 网络连接状态
	Heart_sendBuff[i++] = Ethernet_IsConnected();
	// GPRS入网状态
	Heart_sendBuff[i++] = dcBuff.dtuData.networked;
	// GPRS信号强度
	Heart_sendBuff[i++] = dcBuff.dtuData.rssi;
	// GPRS连接状态
	Heart_sendBuff[i++] = dcBuff.dtuData.connected;
	
	// 保留备用
	i += 41;
	
	// 修改数据长度
	Heart_sendBuff[7] = i - 8;
	
	// 校验码
	crc = MODBUS_RTU_CRC16((uint8_t *) Heart_sendBuff, i);
	*(uint16_t *)(Heart_sendBuff + i) = htons(crc);
	i += 2;
	// 结束符
	Heart_sendBuff[i++] = 0x0d;
	Heart_sendBuff[i++] = 0x0a;
	
	return i;
}

// 任务主体
void Modbus_Task(void *p_arg)
{
	uint8_t i;
	uint32_t heartTick = 0;
	ext_data_t Gprs;

	while(TRUE)
	{
		// 本任务读取发送队列的记录
		// 这条语句用于任务切换（让其它任务有机会得到执行）
		xSemaphoreTake(Modbus_SendQ, 1000);

		if(IsTickOut(heartTick))
		{
			heartTick = GetDelayTick(30000); // 30秒以后再发
			
			// TODO: 发送心跳到上位机，不等待返回
//			i = pack_heart_send_data();
//			RS485_SendDataByte(Heart_sendBuff, i);
		}
		
		if(LoopBuff_GetCount(&Modbus_SendM))
		{
			// 取数据
			memmove(&Gprs, LoopBuff_GetDataPtr(&Modbus_SendM, Modbus_SendM.info.rdPtr), sizeof(ext_data_t));
			LoopBuff_RemoveItems(&Modbus_SendM, 1);
			i = pack_modbus_tran_data(&Gprs);

			// TODO: 发送数据到上位机，不等待返回
			RS485_SendDataByte(Modbus_sendBuff, i);
		}
	}
}