C51 Version 9.05 Product Update

 

What's New in C51 Version 9.03

• [Cx51 Compiler]
  • Improved: Evatronix R8051XC2 core now uses the MDU for signed long divisions.
  • Corrected: With OPTIMIZE(8, SIZE) or higher optimization levels there is a potential problem with common code generation of long/float store operations that store constants with different memory types. Example:
    

    int flag;
                    long xdata l;
                    long *pl;
    
                    void main (void)  {
    
      if (flag)  {   l = 0; flag = 1; }   // store with identical constant value but different space
    
      else       { *pl = 0; flag = 1; }   // may create incorrect common blocks }
    

• [LX51 Compiler]
  • Improved: When using Linker Code Packing the gaps in the BANKAREA are not optimized.
  • Corrected: Potential SEGMENT OVERLAPS when using Linker Code Packing on a banking application.
• [New Device Support]
  • Atmel AT80C51RD2, AT89LP213, AT89LP216, AT89LP52, and AT89LP6440 devices.
  • Infineon XC878LM-13F, XC878CLM-13F, XC878LM-16F, XC878CLM-16F, XC874-13F, XC874LM-13F, XC874CM-13F XC874CLM-13F, XC874-16F, XC874LM-16F, XC874CM-16F, XC874CLM-16F, and XC836MT-1F devices.
  • NXP P87C51FA, P87C51FB, P89CV51RB2, P89CV51RC2, P89CV51RD2, P89LPC779, and P87V660X2 devices.
  • Silabs C8051F348, C8051F349, C8051T606, C8051T630, C8051T631, C8051T632, C8051T633, C8051T634, C8051T635, C8051F540, C8051F541, C8051F542, C8051F543, C8051F544, C8051F545, C8051F546, C8051F547, C8051F550, C8051F551, C8051F552, C8051F553, C8051F554, C8051F555, C8051F556, C8051F557, C8051F560, C8051F561, C8051F562, C8051F563, C8051F564, C8051F565, C8051F566, C8051F567, C8051F568, C8051F569, C8051F570, C8051F571, C8051F572, C8051F573, C8051F574, C8051F575, C8051F34A, C8051F34B, C8051F34C, C8051F34D, C8051F716, C8051F717, C8051F980, C8051F981, C8051F982, C8051F983, C8051F985, C8051F986, C8051F987, C8051F988, C8051F989, C8051F990, C8051F991, C8051F996, C8051F997, C8051F800, C8051F801, C8051F802, C8051F803, C8051F804, C8051F805, C8051F806, C8051F807, C8051F808, C8051F809, C8051F810, C8051F811, C8051F812, C8051F813, C8051F814, C8051F815, C8051F816, C8051F817, C8051F818, C8051F819, C8051F820, C8051F821, C8051F822, C8051F823, C8051F824, C8051F825, C8051F826, C8051F827, C8051F828, C8051F829, C8051F830, C8051F831, C8051F832, C8051F833, C8051F834, C8051F835, C8051F901, C8051F902, C8051F911, C8051F912, Si1000, Si1001, Si1002, Si1003, Si1004, Si1005, Si1010, Si1011, Si1012, Si1013, Si1014, Si1015, C8051F520A, C8051F521A, C8051F523A, C8051F524A, C8051F526A, C8051F527A, C8051F530A, C8051F531A, C8051F533A, C8051F534A, C8051F536A, and C8051F537A devices.
  • Teridian Semiconductors 78M6612, 78M6618, and 71M6543 devices.
  • Texas Instruments CC2530F32, CC2530F64, CC2530F128, CC2530F256, CC2531F128, CC2531F256, CC2533F32, CC2533F64, CC2533F96, CC2540F128, and CC2540F256 devices.
• [µVision]
  This C51 release comes with µVision V4.14.16.
  
   

C51 Version 9.02a

The C51 Version 9.02a product update replaces components of your current Tool Set with the latest versions. 

• [Cx51 Compiler]
  Improved: access to bit-field members with size 1 bit. The compiler uses bit instructions to access such bit-field members. When objects are defined with the bdata memory type, direct bit addressing is used.
  Example:

  struct bf { unsigned char b0:1; unsigned char b1:1; };
  struct bf       a;
  struct bf bdata b;
    :
  if (a.b0 && b.b1)  b.b1 = 0;
  

• [Cx51 Compiler]
  Corrected: multiplication long = int * int is potentially incorrect in Dallas 390 mode.
• [Cx51 Compiler]
  Corrected: explicit cast to unsigned char was ignored with complex address arithmetic.
  Example:

  unsigned char far table[256];
  unsigned char i, v;
    :
  v = table[(unsigned char)(16+i+20)];  // index now truncated to 8-bit
  

• [Cx51 Compiler]
  Corrected: when using conditional operators (? :) in complex parameter lists, there is a potential for unbalanced PUSH / POP instructions. This typically creates a application program crash at the function call.
• [C Run-Time Library]
  Corrected: the function toint did not detect the value range 0x59 - 0x40 as invalid. Now the function returns -1 for these values.
• [C Run-Time Library]
  Corrected: timing of Multiplication Division Unit (MDU) in Evatronix R8051XC2 device is faster and now reflected in the C Library. The MDU timing for int/long multiplication and long division is adjusted.
• [New Supported Devices]
  Infineon XC835MT-2F , XC836-2F , XC836M-1F , XC836M-2F , XC836MT-2F , and XC836T-2F devices.
• [Device Simulation]
  Corrected: SiLabs C8051F41x devices: SMBus simulation when using I²C generator.
• [Device Simulation]
  Corrected: SiLabs C8051F12x devices: automatic page switch for interrupts and timing of timer 2/3/4.
• [Device Simulation]
  Corrected: SiLabs C8051F12x devices: on I²C the receive of more than 256 bytes now generates a stop.
• [Device Simulation]
  Corrected: SiLabs C8051F36x devices: crossbar did not connect the right I/O signals under some circumstances.
• [Device Simulation]
  Corrected: Evatronix T8051: CPU instruction timing.

• [New Supported Devices]
  Infineon XC822T-0F, XC822M-1F, XC822MT-1F, XC824MT-1F, and XC824M-1F devices.
• [Device Support]
  Added: debug support for Infineon XC82X devices.
• [Cx51 Compiler]
  Corrected: when MODDA is used and int numbers are multiplied and assigned to long, the result was potentially incorrect.

C51 v9.00

• [µVision4]
  C51 now includes the new µVision4 IDE.
• [New Supported Devices]
  Evatronix R8051XC(1 DPTR), R8051XC2(1 DPTR), R8051XC2(2 DPTR), R8051XC2(8 DPTR), R8051XC2-A(1 DPTR), R8051XC2-A(2 DPTR), R8051XC2-A(8 DPTR), R8051XC2-AF, R8051XC2-B(1 DPTR), R8051XC2-B(2 DPTR), R8051XC2-B(8 DPTR), and R8051XC2-BF devices.
• [New Supported Devices]
• Nordic nRFLU1P-F16 and nRFLU1P-F32 devices.
• [New Supported Devices]
• NXP P89LPC9361 device.
• [New Supported Devices]
• Silabs C8051F580, C8051F581, C8051F582, C8051F583, C8051F584, C8051F585, C8051F586, C8051F587, C8051F588, C8051F589, C8051F590, and C8051F591 devices.
• [Device Support]
  Corrected device settings for Infineon XC888-6FF, XC888CM-8FF, XC888LM-6FF, XC886-6FF, XC866L-1FR, XC866L-2FR, XC866L-4FR, and XC864-1FRI devices.
• [Device Support]
  Corrected: device settings for Nordic Semiconductor nRF24E1, nRF24E2, nRF9E5, nRF24LU1, and nRF24LE1 devices.
• [Cx51 Compiler]
  Corrected: constant folding of two negative array index values. For example:

  unsigned char arr[512];
  unsigned int i;
  
  i = arr[i-1-5];    // incorrect in C51 V8: arr[i-4] instead of arr[i-6]
  

• Corrected: when using the NOAREGS directive, complex arithmetic with nested calls may create incorrect results. For example:

  #pragma NOAREGS
  
  int result;
  extern char f(unsigned char idx);
  
  result = (f(1)*0x100+f(0)) - (f(3)*0x100+f(2));  // incorrect result. POP destroys value in ACC
  

• [Lx51 Linker]
  Corrected: when using OPTIMIZE(10) or above, there was a potential that common code blocks are called incorrectly. Therefore programs may have operated incorrectly.
• [BL51 Linker/Locater]
  Corrected: when using RTX51 user interrupt functions were overlapping with RTX ISR vectors which resulted in a linker warning.
• [BL51 Linker/Locater]
  Corrected: data overlaying may not work when the last input module contains an interrupt function; the linker incorrectly issues WARNING 16: main uncalled.