During the development and testing of ADAS, we often encounter display problems with floating-point numbers. The storage of floating-point numbers in ECUs often uses 4 bytes. Many people who encounter such problems directly search the Internet for floating-point number processing software or web tools to display floating-point numbers. This adds unnecessary workload and manual entry process to the development and testing process.
In fact, CAPL comes with a function to handle floating-point numbers, and you only need to write a small program to solve it perfectly. Go directly to the source code:
byte data[4]; // four-byte floating point number
dword temp;
temp = data[0] << 24;
temp += data[1] << 16;
temp += data[2] << 8;
temp += data[3]; // Convert the array to four-byte data
floatValue = interpretAsFloat(temp); // The floating-point number conversion function provided in CAPL converts the dword type to the floating-point number type
@floatdata = (double )floatValue; // Here the floating-point number is cast to double type,
Assign value to system variables and then need to define a double type variable floatdata in environment->system variables (the definition of floating-point numbers in environment->system variables only has double type).
Next, you can define a control in the Panel, and then attach the variable floatdata. In this way, floating point numbers can be displayed in the Panel.
Useful friends are welcome to collect and like!