Software Shorts

FPGA utility converts report file to OrCAD library part

The SymorCAD utility in the compressed, concatenated ZIPfile attached to EDN BBS /DI_SIG #1378 accepts the output of Xilinx's FPGA fitter (APR or PPR) and creates an OrCAD library part complete with power and configuration pins. The ZIPfile contains source, executables, and examples that you can convert to FPGAs other than Xilinx's XC3000 and XC4000 series.

The PLD specification attached to EDN BBS /DI_SIG #1379 contains a GAL20V8 specification that provides presettable wait states for program memory, local and global data memory, and I/O devices, as well as a clock for the TMS320C25's serial port.

Clear-speech algorithm uses sigma-delta modulation

The sigma-delta modulation technique in the compressed ZIPfile attached to EDN BBS /DI_SIG #1356 generates clear-sounding audio from a PC's speaker. The material includes source, executable, and examples.