——來自迪文開發(fā)者論壇

本期為大家推送迪文開發(fā)者論壇獲獎開源案例——基于T5L智能屏的汽車抬頭顯示器方案。該方案采用COF智能屏，通過T5L CAN接口，實時獲取汽車OBDII診斷接口的數(shù)據(jù)，并將接收到的車速和轉速數(shù)據(jù)同步顯示在屏幕上，為駕駛員在行車過程中提供直觀、便捷的視覺輔助。

UI素材展示

GUI工程設計 C51工程設計

通過T5L CAN接口，獲取車速和轉速數(shù)據(jù)，部分參考代碼如下：

void main(void){ T5LInit(); T0_Init(); // 定時器0初始化 EA = 1; //等待上電穩(wěn)定 TimerExtDelayMs(2000); GaugeViewInit(); while (1) { //obdii系統(tǒng)進入識別 if (ObdiiSysEnter()) { break; } } //HUD功能主入口 GaugeViewFunc();}
void GaugeViewFunc(void){ uint8_t rawDataBuff[256]; uint8_t resultBuff[5]; float vehicleSpeed = 0; float rotateSpeed = 0; uint32_t tempData = 0; while (1) { memset(rawDataBuff, 0, 256); // 讀取轉速 if (ObdiiReadPid(rawDataBuff, 2, 0x01, 0x0C)) { ObdiiLdsCalResult(0x0C, rawDataBuff, resultBuff); tempData = resultBuff[3]; tempData = resultBuff[2] + (tempData << 8); tempData = resultBuff[1] + (tempData << 8); tempData = resultBuff[0] + (tempData << 8); rotateSpeed = (float)tempData; GaugeViewRotateSpeedSet(rotateSpeed); } memset(rawDataBuff, 0, 256); // 讀取車速 if (ObdiiReadPid(rawDataBuff, 2, 0x01, 0x0D)) { ObdiiLdsCalResult(0x0D, rawDataBuff, resultBuff); tempData = resultBuff[3]; tempData = resultBuff[2] + (tempData << 8); tempData = resultBuff[1] + (tempData << 8); tempData = resultBuff[0] + (tempData << 8); vehicleSpeed = (float)tempData; GaugeViewPointerSet((uint8_t)vehicleSpeed); GaugeViewVehicleSpeedSet(vehicleSpeed); } }}void GaugeViewFunc(void){ uint8_t rawDataBuff[256]; uint8_t resultBuff[5]; float vehicleSpeed = 0; float rotateSpeed = 0; uint32_t tempData = 0; while (1) { memset(rawDataBuff, 0, 256); // 讀取轉速 if (ObdiiReadPid(rawDataBuff, 2, 0x01, 0x0C)) { ObdiiLdsCalResult(0x0C, rawDataBuff, resultBuff); tempData = resultBuff[3]; tempData = resultBuff[2] + (tempData << 8); tempData = resultBuff[1] + (tempData << 8); tempData = resultBuff[0] + (tempData << 8); rotateSpeed = (float)tempData; GaugeViewRotateSpeedSet(rotateSpeed); } memset(rawDataBuff, 0, 256); // 讀取車速 if (ObdiiReadPid(rawDataBuff, 2, 0x01, 0x0D)) { ObdiiLdsCalResult(0x0D, rawDataBuff, resultBuff); tempData = resultBuff[3]; tempData = resultBuff[2] + (tempData << 8); tempData = resultBuff[1] + (tempData << 8); tempData = resultBuff[0] + (tempData << 8); vehicleSpeed = (float)tempData; GaugeViewPointerSet((uint8_t)vehicleSpeed); GaugeViewVehicleSpeedSet(vehicleSpeed); } }}