【道生物联TKB-620开发板试用】GPS模块定位数据发送端实现

1.立项

本来我提交的试用项目是农业大棚传感器数据无线化，但是农业大棚项目内有温湿度数据，有坛友已经实现，我要是在做一个同样的，有重复之嫌，遂拿出另外一个Idea来实现，这个Ideal主要是为了实现无人机野外飞丢找寻，本人本身是一个飞友。现在某宝上是基于4G来实现。4G使用时需要流量卡支持，需要额外掏一笔流量费。其次如果在4G信号覆盖不了的地方飞丢，这玩意就失去了作用，我要实现一个基于Sub-1G无线方案的，在任何地方飞丢都可以找到你的无人机。

2.准备材料

TKB-620开发板*2

Ulox neo-7n8*1 ，支持nmea-183输出，使用$GPRMC定位信息
3.代码实现
GPS模块使用开发板上STM32F103RC的UART5接口(对应开发板上的J18)，注意此接口不支持DMA。

串口配置和GPS数据解析如下:

`

static uint8_t  gpsUartDmaRxBuf[GPS_DMA_RX_BUF_SIZE];
uint16_t point1 = 0;
GpsData_t gpsData;


void parseGpsBuffer(void);
void errorLog(int num);
void GPSUartInit(uint32_t baudrate)     //UART5
{
    GPIO_InitTypeDef  GPIO_InitStructure;
    USART_InitTypeDef USART_InitStructure;
    NVIC_InitTypeDef NVIC_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC|RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO, ENABLE); // 使能USART5，GPIOC时钟
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART5, ENABLE);


    USART_DeInit(UART5);  //复位串口5
    //USART5_TX   PC12
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12; //PC12
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;	//复用推挽输出
    GPIO_Init(GPIOC, &GPIO_InitStructure); //初始化PC12
    //USART5_RX	  PD2
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//上拉输入
    GPIO_Init(GPIOD, &GPIO_InitStructure);  //初始化PB11

    // USART 初始化
    USART_InitStructure.USART_BaudRate            = baudrate;
    USART_InitStructure.USART_WordLength          = USART_WordLength_8b;            // Data bits: 8
    USART_InitStructure.USART_StopBits            = USART_StopBits_1;               // Stop bits: 1
    USART_InitStructure.USART_Parity              = USART_Parity_No;                // 无奇偶检验位
    USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; // 无硬件数据流控制
    USART_InitStructure.USART_Mode                = USART_Mode_Rx | USART_Mode_Tx;  // 收发模式
    USART_Init(UART5, &USART_InitStructure);
    USART_ITConfig(UART5, USART_IT_RXNE, ENABLE);                                   // 开启串口接收空闲中断
    //USART_ITConfig(UART5,USART_IT_TC,ENABLE); 
    //WorkUartDmaRxInit();
    //WorkUartDmaTxInit();
    NVIC_InitStructure.NVIC_IRQChannel = UART5_IRQn;          // UART5中断通道
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;  // 抢占优先级
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;         // 子优先级
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);  
    memset(gpsUartDmaRxBuf, 0, GPS_DMA_RX_BUF_SIZE);      
    point1 = 0;     
    USART_Cmd(UART5, ENABLE);


}

void parseGpsBuffer()
{
	char *subString;
	char *subStringNext;
	char i = 0;
    char usefullBuffer[2]; 
    double temp;
    // printf("**************\\\\r\\\\n");
    // printf("%s\\\\n",gpsData.GPS_Buffer);		
	if (gpsData.isGetData)
	{
		gpsData.isGetData = false;

		for (i = 0 ; i <= 6 ; i++)
		{
			if (i == 0)
			{
				if ((subString = strstr(gpsData.GPS_Buffer, ",")) == NULL)
				{
                    errorLog(1);
                }	
			}
			else
			{
				subString++;
				if ((subStringNext = strstr(subString, ",")) != NULL)
				{					
					switch(i)
					{
						case 1:
                            memcpy(gpsData.UTCTime, subString, subStringNext - subString);       
                            break;	
						case 2:
                            memcpy(usefullBuffer, subString, subStringNext - subString);
                            break;	
						case 3:
                            memcpy(gpsData.latitude, subString, subStringNext - subString);
                            temp = atof(gpsData.latitude);
                            gpsData.dLatitude = nmea_ndeg2degree(temp);
                            sprintf(gpsData.latitude,"%.3f",gpsData.dLatitude); 
                            break;	
						case 4:
                            memcpy(gpsData.N_S, subString, subStringNext - subString);
                            break;	
						case 5:
                            memcpy(gpsData.longitude, subString, subStringNext - subString);
                            temp = atof(gpsData.longitude);
                            gpsData.dLongitude = nmea_ndeg2degree(temp);
                            sprintf(gpsData.longitude,"%.3f",gpsData.dLongitude); 
                            break;	
						case 6:
                            memcpy(gpsData.E_W, subString, subStringNext - subString);
                            break;
						default:
                            break;
					}

					subString = subStringNext;
					gpsData.isParseData = true;
					if(usefullBuffer[0] == 'A')      //有效数据
                    {
                        gpsData.isUsefull = true;
                    }
					else if(usefullBuffer[0] == 'V')   //无效数据
                    {
                        gpsData.isUsefull = false;
                        break;       //无效数据的话退出解析
                    }                    

				}
				else
				{
					errorLog(2);	
				}
			}


		}
	}
}

void errorLog(int num)
{
	printf("ERROR%d\\\\r\\\\n",num);	
}
void UART5_IRQHandler(void)                	//串口5中断服务程序
{
	u8 Res;

	if(USART_GetITStatus(UART5, USART_IT_RXNE) != RESET) 
	{
		Res =UART5->DR;//(USART1->DR);	//读取接收到的数据
	
	    if(Res == '$')
	    {
		    point1 = 0;	
	    }
	    gpsUartDmaRxBuf[point1++] = Res;

	    if(gpsUartDmaRxBuf[0] == '$' && gpsUartDmaRxBuf[4] == 'M' && gpsUartDmaRxBuf[5] == 'C')			//确定是否收到"GPRMC/GNRMC"这一帧数据
	    {
		    if(Res == '\\\\n')									   
		    {
			    memset(gpsData.GPS_Buffer, 0, GPS_Buffer_Length);      //清空
			    memcpy(gpsData.GPS_Buffer, gpsUartDmaRxBuf, point1); 	//保存数据
			    gpsData.isGetData = true;
			    point1 = 0;
			    memset(gpsUartDmaRxBuf, 0, GPS_DMA_RX_BUF_SIZE);      //清空				
		    }				
	    }	
	    if(point1 >= GPS_DMA_RX_BUF_SIZE)
	    {
		    point1 = GPS_DMA_RX_BUF_SIZE;
	    }
    }
}

OLED菜单代码:

`

show_param_t show_param[] = 
 {
	{
		.screenIdx    = 0,
		.screen_param = 
		{
			{.x_base = 0, .y_base = 0, .string = "1.Rate Mode: 6",   .modifyPos = 12, .modify = 1},
			{.x_base = 0, .y_base = 1, .string = "  Freq:473100000", .modifyPos = 7,  .modify = 1},
			{.x_base = 0, .y_base = 2, .string = "  Txp:15",         .modifyPos = 6,  .modify = 1},
			{.x_base = 0, .y_base = 3, .string = "  Tx Count:100",   .modifyPos = 11, .modify = 0},
			{.x_base = 0, .y_base = 4, .string = "  WakeOnRadio:N ", .modifyPos = 14, .modify = 1},
			{.x_base = 0, .y_base = 5, .string = "                ", .modifyPos = 11, .modify = 0},
			{.x_base = 0, .y_base = 6, .string = "                ", .modifyPos = 14, .modify = 0},
			{.x_base = 0, .y_base = 7, .string = "                ", .modifyPos = 14, .modify = 0},
		}
	},

	{
		.screenIdx = 1,
		.screen_param = 
		{
			{.x_base = 0, .y_base = 0, .string = "2.Tx Count:100",   .modifyPos = 11, .modify = 0},
			{.x_base = 0, .y_base = 1, .string = "  Send:0",         .modifyPos = 7,  .modify = 1},
			{.x_base = 0, .y_base = 2, .string = "  Rate Mode:13",   .modifyPos = 12, .modify = 1},
			{.x_base = 0, .y_base = 3, .string = "  Freq:473100000", .modifyPos = 7,  .modify = 1},
			{.x_base = 0, .y_base = 4, .string = "  Txp:15",         .modifyPos = 6,  .modify = 1},
			{.x_base = 0, .y_base = 5, .string = "             ",    .modifyPos = 11, .modify = 0},
			{.x_base = 0, .y_base = 6, .string = "             ",    .modifyPos = 11, .modify = 0},
			{.x_base = 0, .y_base = 7, .string = "             ",    .modifyPos = 11, .modify = 0},
		}
	},

	{
		.screenIdx = 2,
		.screen_param = 
		{
			{.x_base = 0, .y_base = 0, .string = "3.Rssi:-80 ",      .modifyPos = 7,  .modify = 0},
			{.x_base = 0, .y_base = 1, .string = "  Snr:20   ",      .modifyPos = 6,  .modify = 0},
			{.x_base = 0, .y_base = 2, .string = "  Rx Count:100",   .modifyPos = 11, .modify = 0},
			{.x_base = 0, .y_base = 3, .string = "  Loss:100%",      .modifyPos = 7,  .modify = 0},
			{.x_base = 0, .y_base = 4, .string = "  Rate Mode:13",   .modifyPos = 12, .modify = 1},
			{.x_base = 0, .y_base = 5, .string = "  Freq:473100000", .modifyPos = 7,  .modify = 1},
			{.x_base = 0, .y_base = 6, .string = "  Txp:15",         .modifyPos = 6,  .modify = 1}
		}
	},

	{
		.screenIdx = 3,
		.screen_param = 
		{
			{.x_base = 0, .y_base = 0, .string = "4.RF Ver:2.0.0  ", .modifyPos = 9, .modify = 0},
			{.x_base = 0, .y_base = 1, .string = "  McuVer:2.0.3 ",  .modifyPos = 9, .modify = 0},
			{.x_base = 0, .y_base = 2, .string = "                ", .modifyPos = 8, .modify = 0},
			{.x_base = 0, .y_base = 3, .string = "                ", .modifyPos = 9, .modify = 0}
		}
	},
	{
		.screenIdx = 4,
		.screen_param = 
		{
			{.x_base = 0, .y_base = 0, .string = "5.GPS Display   ", .modifyPos = 0, .modify = 0},
			{.x_base = 0, .y_base = 1, .string = "Longitudes:     ", .modifyPos = 0, .modify = 0},
			{.x_base = 0, .y_base = 2, .string = "Invalid", .modifyPos = 0, .modify = 0},
			{.x_base = 0, .y_base = 3, .string = "Latitude:", .modifyPos = 0, .modify = 0},
			{.x_base = 0, .y_base = 4, .string = "Invalid", .modifyPos = 0, .modify = 0},
		}
	}
};

OLED显示代码:

`

void ScreenRefresh(void)
{
	u8  screenIdx;
	u8  str[12];
	u8  rowIdx;
	u8  modifyPos = 0;
	u8  xPos      = 0;
	u8  yPos      = 0;
	u8 *pStr      = NULL;
    if(gpsData.isUsefull&&sys_param.screenIdx==4)   //gps主动刷新
	{
	    sys_param.screen_refresh = 1;
	}
	if (!sys_param.screen_refresh) 
	{
		return;
	} 
	else
	{
		sys_param.screen_refresh = 0;
	}

	OLED_Clear();
	screenIdx = sys_param.screenIdx;
	rowIdx    = sys_param.rowIdx % SHOW_LINE_MAX;

	switch (screenIdx) 
	{
	case 0:
		// p0
		sprintf((char *)str, "%d", sys_param.rateMode);
		modifyPos = show_param[screenIdx].screen_param[0].modifyPos;
		memset(&show_param[screenIdx].screen_param[0].string[modifyPos], ' ', 16 - modifyPos);
		memcpy(&show_param[screenIdx].screen_param[0].string[modifyPos], str, strlen((char *)str));
		xPos = show_param[screenIdx].screen_param[0].x_base;
		yPos = show_param[screenIdx].screen_param[0].y_base;
		pStr = show_param[screenIdx].screen_param[0].string;
		OLED_ShowString(xPos, yPos, pStr, (rowIdx == yPos) && sys_param.rowSelected ? 0 : 1);
		// p1
		sprintf((char *)str, "%d", sys_param.freq);
		modifyPos = show_param[screenIdx].screen_param[1].modifyPos;
		memset(&show_param[screenIdx].screen_param[1].string[modifyPos], ' ', 16 - modifyPos);
		memcpy(&show_param[screenIdx].screen_param[1].string[modifyPos], str, strlen((char *)str));
		xPos = show_param[screenIdx].screen_param[1].x_base;
		yPos = show_param[screenIdx].screen_param[1].y_base;
		pStr = show_param[screenIdx].screen_param[1].string;
		OLED_ShowString(xPos, yPos, pStr, (rowIdx == yPos) && sys_param.rowSelected ? 0 : 1);
		// p2
		sprintf((char *)str, "%d", sys_param.txpIdx);
		modifyPos = show_param[screenIdx].screen_param[2].modifyPos;
		memset(&show_param[screenIdx].screen_param[2].string[modifyPos], ' ', 16 - modifyPos);
		memcpy(&show_param[screenIdx].screen_param[2].string[modifyPos], str, strlen((char *)str));
		xPos = show_param[screenIdx].screen_param[2].x_base;
		yPos = show_param[screenIdx].screen_param[2].y_base;
		pStr = show_param[screenIdx].screen_param[2].string;
		OLED_ShowString(xPos, yPos, pStr, (rowIdx == yPos) && sys_param.rowSelected ? 0 : 1);
		// p3
		sprintf((char *)str, "%d", sys_param.txTargetCnt);
		modifyPos = show_param[screenIdx].screen_param[3].modifyPos;
		memset(&show_param[screenIdx].screen_param[3].string[modifyPos], ' ', 16 - modifyPos);
		memcpy(&show_param[screenIdx].screen_param[3].string[modifyPos], str, strlen((char *)str));
		xPos = show_param[screenIdx].screen_param[3].x_base;
		yPos = show_param[screenIdx].screen_param[3].y_base;
		pStr = show_param[screenIdx].screen_param[3].string;
		OLED_ShowString(xPos, yPos, pStr, (rowIdx == yPos) && sys_param.rowSelected ? 0 : 1);
		// p4
		modifyPos = show_param[screenIdx].screen_param[4].modifyPos;
		memset(&show_param[screenIdx].screen_param[4].string[modifyPos], ' ', 16 - modifyPos);
		memcpy(&show_param[screenIdx].screen_param[4].string[modifyPos],
			   sys_param.worType == WOR_TYPE_NONE ? "N" : sys_param.worType == WOR_TYPE_MASTER ? "M" : "S", 1);
		xPos = show_param[screenIdx].screen_param[4].x_base;
		yPos = show_param[screenIdx].screen_param[4].y_base;
		pStr = show_param[screenIdx].screen_param[4].string;
		OLED_ShowString(xPos, yPos, pStr, (rowIdx == yPos) && sys_param.rowSelected ? 0 : 1);
		// p5
		xPos = show_param[screenIdx].screen_param[5].x_base;
		yPos = show_param[screenIdx].screen_param[5].y_base;
		pStr = show_param[screenIdx].screen_param[5].string;
		OLED_ShowString(xPos, yPos, pStr, (rowIdx == yPos) && sys_param.rowSelected ? 0 : 1);
		// p6
		xPos = show_param[screenIdx].screen_param[6].x_base;
		yPos = show_param[screenIdx].screen_param[6].y_base;
		pStr = show_param[screenIdx].screen_param[6].string;
		OLED_ShowString(xPos, yPos, pStr, (rowIdx == yPos) && sys_param.rowSelected ? 0 : 1);
		// p7
		xPos = show_param[screenIdx].screen_param[7].x_base;
		yPos = show_param[screenIdx].screen_param[7].y_base;
		pStr = show_param[screenIdx].screen_param[7].string;
		OLED_ShowString(xPos, yPos, pStr, (rowIdx == yPos) && sys_param.rowSelected ? 0 : 1);
		break;

	case 1:
		// p0
		sprintf((char *)str, "%d", sys_param.txTargetCnt);
		modifyPos = show_param[screenIdx].screen_param[0].modifyPos;
		memset(&show_param[screenIdx].screen_param[0].string[modifyPos], ' ', 16 - modifyPos);
		memcpy(&show_param[screenIdx].screen_param[0].string[modifyPos], str, strlen((char *)str));
		xPos = show_param[screenIdx].screen_param[0].x_base;
		yPos = show_param[screenIdx].screen_param[0].y_base;
		pStr = show_param[screenIdx].screen_param[0].string;
		OLED_ShowString(xPos, yPos, pStr, (rowIdx == yPos) && sys_param.rowSelected ? 0 : 1);
		// p1
		sprintf((char *)str, "%d", sys_param.txSentCnt);
		modifyPos = show_param[screenIdx].screen_param[1].modifyPos;
		memset(&show_param[screenIdx].screen_param[1].string[modifyPos], ' ', 16 - modifyPos);
		memcpy(&show_param[screenIdx].screen_param[1].string[modifyPos], str, strlen((char *)str));
		xPos = show_param[screenIdx].screen_param[1].x_base;
		yPos = show_param[screenIdx].screen_param[1].y_base;
		pStr = show_param[screenIdx].screen_param[1].string;
		OLED_ShowString(xPos, yPos, pStr, (rowIdx == yPos) && sys_param.rowSelected ? 0 : 1);
		// p2
		sprintf((char *)str, "%d", sys_param.rateMode);
		modifyPos = show_param[screenIdx].screen_param[2].modifyPos;
		memset(&show_param[screenIdx].screen_param[2].string[modifyPos], ' ', 16 - modifyPos);
		memcpy(&show_param[screenIdx].screen_param[2].string[modifyPos], str, strlen((char *)str));
		xPos = show_param[screenIdx].screen_param[2].x_base;
		yPos = show_param[screenIdx].screen_param[2].y_base;
		pStr = show_param[screenIdx].screen_param[2].string;
		OLED_ShowString(xPos, yPos, pStr, (rowIdx == yPos) && sys_param.rowSelected ? 0 : 1);
		// p3
		sprintf((char *)str, "%d", sys_param.freq);
		modifyPos = show_param[screenIdx].screen_param[3].modifyPos;
		memset(&show_param[screenIdx].screen_param[3].string[modifyPos], ' ', 16 - modifyPos);
		memcpy(&show_param[screenIdx].screen_param[3].string[modifyPos], str, strlen((char *)str));
		xPos = show_param[screenIdx].screen_param[3].x_base;
		yPos = show_param[screenIdx].screen_param[3].y_base;
		pStr = show_param[screenIdx].screen_param[3].string;
		OLED_ShowString(xPos, yPos, pStr, (rowIdx == yPos) && sys_param.rowSelected ? 0 : 1);
		// p4
		sprintf((char *)str, "%d", sys_param.txpIdx);
		modifyPos = show_param[screenIdx].screen_param[4].modifyPos;
		memset(&show_param[screenIdx].screen_param[4].string[modifyPos], ' ', 16 - modifyPos);
		memcpy(&show_param[screenIdx].screen_param[4].string[modifyPos], str, strlen((char *)str));
		xPos = show_param[screenIdx].screen_param[4].x_base;
		yPos = show_param[screenIdx].screen_param[4].y_base;
		pStr = show_param[screenIdx].screen_param[4].string;
		OLED_ShowString(xPos, yPos, pStr, (rowIdx == yPos) && sys_param.rowSelected ? 0 : 1);
		break;

	case 2:
		// p0
		sprintf((char *)str, "%d", sys_param.rssi);
		modifyPos = show_param[screenIdx].screen_param[0].modifyPos;
		memset(&show_param[screenIdx].screen_param[0].string[modifyPos], ' ', 16 - modifyPos);
		memcpy(&show_param[screenIdx].screen_param[0].string[modifyPos], str, strlen((char *)str));
		xPos = show_param[screenIdx].screen_param[0].x_base;
		yPos = show_param[screenIdx].screen_param[0].y_base;
		pStr = show_param[screenIdx].screen_param[0].string;
		OLED_ShowString(xPos, yPos, pStr, (rowIdx == yPos) && sys_param.rowSelected ? 0 : 1);

		// p1
		sprintf((char *)str, "%d", sys_param.snr);
		modifyPos = show_param[screenIdx].screen_param[1].modifyPos;
		memset(&show_param[screenIdx].screen_param[1].string[modifyPos], ' ', 16 - modifyPos);
		memcpy(&show_param[screenIdx].screen_param[1].string[modifyPos], str, strlen((char *)str));
		xPos = show_param[screenIdx].screen_param[1].x_base;
		yPos = show_param[screenIdx].screen_param[1].y_base;
		pStr = show_param[screenIdx].screen_param[1].string;
		OLED_ShowString(xPos, yPos, pStr, (rowIdx == yPos) && sys_param.rowSelected ? 0 : 1);

		// p2
		sprintf((char *)str, "%d", sys_param.rx_count);
		modifyPos = show_param[screenIdx].screen_param[2].modifyPos;
		memset(&show_param[screenIdx].screen_param[2].string[modifyPos], ' ', 16 - modifyPos);
		memcpy(&show_param[screenIdx].screen_param[2].string[modifyPos], str, strlen((char *)str));
		xPos = show_param[screenIdx].screen_param[2].x_base;
		yPos = show_param[screenIdx].screen_param[2].y_base;
		pStr = show_param[screenIdx].screen_param[2].string;
		OLED_ShowString(xPos, yPos, pStr, (rowIdx == yPos) && sys_param.rowSelected ? 0 : 1);
		// p3
		sprintf((char *)str, "%.2f%%", sys_param.rxPktLossRate);
		modifyPos = show_param[screenIdx].screen_param[3].modifyPos;
		memset(&show_param[screenIdx].screen_param[3].string[modifyPos], ' ', 16 - modifyPos);
		memcpy(&show_param[screenIdx].screen_param[3].string[modifyPos], str, strlen((char *)str));
		// memcpy(&show_param[screen_index].screen_param[2].string[show_param[screen_index].screen_param[2].change_index], tempdata, tempvalue);
		xPos = show_param[screenIdx].screen_param[3].x_base;
		yPos = show_param[screenIdx].screen_param[3].y_base;
		pStr = show_param[screenIdx].screen_param[3].string;
		OLED_ShowString(xPos, yPos, pStr, (rowIdx == yPos) && sys_param.rowSelected ? 0 : 1);

		// p4
		sprintf((char *)str, "%d", sys_param.rateMode);
		modifyPos = show_param[screenIdx].screen_param[4].modifyPos;
		memset(&show_param[screenIdx].screen_param[4].string[modifyPos], ' ', 16 - modifyPos);
		memcpy(&show_param[screenIdx].screen_param[4].string[modifyPos], str, strlen((char *)str));
		xPos = show_param[screenIdx].screen_param[4].x_base;
		yPos = show_param[screenIdx].screen_param[4].y_base;
		pStr = show_param[screenIdx].screen_param[4].string;
		OLED_ShowString(xPos, yPos, pStr, (rowIdx == yPos) && sys_param.rowSelected ? 0 : 1);
		// p5
		sprintf((char *)str, "%d", sys_param.freq);
		modifyPos = show_param[screenIdx].screen_param[5].modifyPos;
		memset(&show_param[screenIdx].screen_param[5].string[modifyPos], ' ', 16 - modifyPos);
		memcpy(&show_param[screenIdx].screen_param[5].string[modifyPos], str, strlen((char *)str));
		xPos = show_param[screenIdx].screen_param[5].x_base;
		yPos = show_param[screenIdx].screen_param[5].y_base;
		pStr = show_param[screenIdx].screen_param[5].string;
		OLED_ShowString(xPos, yPos, pStr, (rowIdx == yPos) && sys_param.rowSelected ? 0 : 1);
		// p6
		sprintf((char *)str, "%d", sys_param.txpIdx);
		modifyPos = show_param[screenIdx].screen_param[6].modifyPos;
		memset(&show_param[screenIdx].screen_param[6].string[modifyPos], ' ', 16 - modifyPos);
		memcpy(&show_param[screenIdx].screen_param[6].string[modifyPos], str, strlen((char *)str));
		xPos = show_param[screenIdx].screen_param[6].x_base;
		yPos = show_param[screenIdx].screen_param[6].y_base;
		pStr = show_param[screenIdx].screen_param[6].string;
		OLED_ShowString(xPos, yPos, pStr, (rowIdx == yPos) && sys_param.rowSelected ? 0 : 1);
		break;

	case 3:
		xPos = show_param[screenIdx].screen_param[0].x_base;
		yPos = show_param[screenIdx].screen_param[0].y_base;
		pStr = show_param[screenIdx].screen_param[0].string;
		OLED_ShowString(xPos, yPos, pStr, (rowIdx == yPos) && sys_param.rowSelected ? 0 : 1);

		xPos = show_param[screenIdx].screen_param[1].x_base;
		yPos = show_param[screenIdx].screen_param[1].y_base;
		pStr = show_param[screenIdx].screen_param[1].string;
		OLED_ShowString(xPos, yPos, pStr, (rowIdx == yPos) && sys_param.rowSelected ? 0 : 1);
		break;
	case 4:	
	    if(gpsData.isUsefull)
		{
			xPos = show_param[screenIdx].screen_param[0].x_base;
			yPos = show_param[screenIdx].screen_param[0].y_base;
			pStr = show_param[screenIdx].screen_param[0].string;
			OLED_ShowString(xPos, yPos, pStr, 1);

			xPos = show_param[screenIdx].screen_param[1].x_base;
			yPos = show_param[screenIdx].screen_param[1].y_base;
			pStr = show_param[screenIdx].screen_param[1].string;
			OLED_ShowString(xPos, yPos, pStr, 1);
			//经度
			xPos = show_param[screenIdx].screen_param[2].x_base;
			yPos = show_param[screenIdx].screen_param[2].y_base;
            memset(str,0,12);
			strcat((char *)str, gpsData.E_W);
			strcat((char *)str, ":");
			strcat((char *)str, gpsData.longitude);
			pStr = str;
			OLED_ShowString(xPos, yPos, pStr, 1);
			
			xPos = show_param[screenIdx].screen_param[3].x_base;
			yPos = show_param[screenIdx].screen_param[3].y_base;
			pStr = show_param[screenIdx].screen_param[3].string;
			OLED_ShowString(xPos, yPos, pStr, 1);
			//纬度
			xPos = show_param[screenIdx].screen_param[4].x_base;
			yPos = show_param[screenIdx].screen_param[4].y_base;
			memset(str,0,12);
			strcat((char *)str, gpsData.N_S);
			strcat((char *)str, ":");
			strcat((char *)str, gpsData.latitude);
			pStr = str;
			OLED_ShowString(xPos, yPos, pStr, 1);
			gpsData.isUsefull = false;
		}
		else
		{
			xPos = show_param[screenIdx].screen_param[0].x_base;
			yPos = show_param[screenIdx].screen_param[0].y_base;
			pStr = show_param[screenIdx].screen_param[0].string;
			OLED_ShowString(xPos, yPos, pStr, 1);

			xPos = show_param[screenIdx].screen_param[1].x_base;
			yPos = show_param[screenIdx].screen_param[1].y_base;
			pStr = show_param[screenIdx].screen_param[1].string;
			OLED_ShowString(xPos, yPos, pStr, 1);

			xPos = show_param[screenIdx].screen_param[2].x_base;
			yPos = show_param[screenIdx].screen_param[2].y_base;
			pStr = show_param[screenIdx].screen_param[2].string;
			OLED_ShowString(xPos, yPos, pStr, 1);
			
			xPos = show_param[screenIdx].screen_param[3].x_base;
			yPos = show_param[screenIdx].screen_param[3].y_base;
			pStr = show_param[screenIdx].screen_param[3].string;
			OLED_ShowString(xPos, yPos, pStr, 1);

			xPos = show_param[screenIdx].screen_param[4].x_base;
			yPos = show_param[screenIdx].screen_param[4].y_base;
			pStr = show_param[screenIdx].screen_param[4].string;
			OLED_ShowString(xPos, yPos, pStr, 1);
		}
		break;
	default:
		OLED_ShowString(0, 0, "ERROR SHOW", 1);
		break;
	}
}

GPS定位数据发送:
注意:TK8620发送数据只支持0-9，A-F字符串数据，所以要将-N_S:%s,latitude:%s,E_W:%s,longitude:%s,转换为16进制字符串。

`

void Send_GPS(void)
{
    char cmd[128];
    char temp[64]="";
    char buffer[128];
    if(gpsData.isUsefull)
    {
        memset(cmd,0,128);
        memset(buffer,0,128);
        sprintf(cmd, "AT+SENDB=0001020304"); 
        sprintf(temp, "-N_S:%s,latitude:%s,E_W:%s,longitude:%s,", gpsData.N_S,gpsData.latitude,gpsData.E_W,gpsData.longitude);
        //printf("temp:%s\\\\n",temp);
        Data2Str((uint8_t*)temp,buffer,strlen(temp));
        //printf("buffer:%s\\\\n",buffer);
        strcat(cmd,buffer);
        strcat(cmd,"\\\\r\\\\n");	   
				Send_AtCmd(cmd);
    }
}

主函数实现:

`

int main(void)
{
    OLED_Init();
    OLED_Clear();
    PeripheralInit();
    ExtiInit();            // 初始化外部中断
    ExtiCbRegister(WorCb); // 注册外部中断回调函数
    key_init();
    TimerCbRegister(TIM3, autoSendPeriod);
    printf("*************************************************************\\\\r\\\\n");
    printf("* This is example of async p2p AT demo by using AT CMD      *\\\\r\\\\n");
    printf("* Compile time %s %s                                         \\\\r\\\\n", __DATE__, __TIME__);
    printf("*************************************************************\\\\r\\\\n");
    GPSUartInit(9600); 
    while (1) 
	{
        FSM_Manager();
        parseGpsBuffer();
        printGpsBuffer();
        Send_GPS();    
        ScreenRefresh();
        KeyInfoUpdate();
        if (sys_param.autoSendEn) 
		{
            sys_param.autoSendEn = 0;
            //RF_SendDataOnce();
            Send_GPS_Example();
            if (sys_param.txSentCnt < sys_param.txTargetCnt) 
			{
                TimerInit(TIM3, &(TimerInitCfg){.psc = 36000, .arr = 2000 * SEND_TIMEOUT, .mode = TIMER_CNTMODE_ONESHOT});
            } 
			else 
			{
                sys_param.txTargetCnt = 0;
            }
            sys_param.screen_refresh = 1;
        }

        if (sys_param.wor) 
		{
            sys_param.wor = 0;
            printf("wakeup on radio\\\\r\\\\n");
            sys_param.fsmState = FSM_GET_VER;
            sys_param.rx_count       = 1;
            sys_param.screen_refresh = 1;
        }

    }
}

4.成果展示

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【道生物联TKB-620开发板试用】GPS模块定位数据发送端实现

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