Msp430 上的 RAM 内存不足

Question

I ran out of RAM on my MSP430 because I am getting this message;

Error[e16]: Segment DATA16_Z (size: 0x638 align: 0x1) is too long for segment definition. At least 0x44 more bytes needed. The problem occurred while  
processing the segment placement command "-Z(DATA)DATA16_I,DATA16_Z,DATA16_N=0200-_SYS_RAM_END", where at the moment of placement  
the available memory ranges were "CODE:20b-7ff" 
   Reserved ranges relevant to this placement: 
   200-7ff              DATA16_I 
Error while running Linker 

So I found that the problem is due to these static variables within one of my functions;

  static float circularBufferTemp[CIRC_BUFF_WIDTH_SCH3] = {0};
  static float circularBufferHumi[CIRC_BUFF_WIDTH_SCH3] = {0};
  static UCHAR indexMeasTemp = 0;
  static UCHAR indexMeasHumi = 0;

Now the question is; How can I avoid this problem considering that I have to save those variables inside that function every time it is called by my application code?

Answer 1

You may consider:

• Compress your data. As your data are sensor data you might consider, for instance, to save deltas instead of full values.
• Reduce buffer and increase frequence of data processing.
• Depending of your application you can consider to use flash and/or fram. Erasing is slow but writing is not that slow. Erase operation usually can be carried on asynchronously.