不知道為何在full running 下只行中斷, 而在行step 才跳回主程式。

main()
{TPM2SC = 0x57;
  TPM2C0SC = 0x14;
  TPM2MOD = 0xf424;
.............

interrupt void tpm2ch0_i()
{
  scnt--;
  WriteLCDString( 1, string );
  if (scnt == 0) scnt=10;
  TPM2SC=0x57;
  TPM2C0SC = 0x14;
  return;
}