• Why can't I read SBUF?
    The code is like this: #include <reg51.h> void main() { unsigned char ch; SBUF = 0xcc; ch = SBUF ; } I found that the value in ch is always zero,however, when I substituated SBUF with other...
  • Can't read/write to XDATA
    Can anyone help us? When can't get the right informations out of XDATA. We have tried to make a logo on a display, and first we placed all the displaydata in CODE (EPROM), and then the logo looks fine...
  • can't read sbuf on debug
    Hi, how can I read SBUF while debugging? R_serial () interrupt 4 { if(RI) { serialR = SBUF; RI=0; CompDataRx[count]=serialR; count++; } else TI = 0; } when I put any value in SBUF...
  • Can't disable Read Out Protection
    We had run our STM32F207 Hardware over night with a battery. Now the battery is empty and we can't flash the STM32F207 with Ulink Me (of course with proper powersupply). Ulink says: Error: Flash...
  • The Add-on disk is broken (can't be read)
    I want to install PK51 V7.2. The setup program request the add-on disk. However, the add-on disk is broken (can't be read) . How may I get the files in the disk to complete the installation?