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Problem in interfacing C files withan assembly file in uVision2 IDE

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Read-Only Author Reny Rymond Posted 17-Jun-2006 10:16 GMT Toolset C51	Problem in interfacing C files withan assembly file in uVision2 IDE Reny Rymond I've tried to process the data obtained from the host(PC) (which is obtained using C code)using certain assembler functions to speed up the data transfer.I'm using CY68013A-FX2LP controller. I did the following : In C code(globally) unsigned char d_low; extern void write(void) In assembly code extrn DATA(d_low) public write cseg at 2000h write: mov dptr,#4000h mov a,d_low movx @dptr,a ret END But the data I send couldn't read back correctly...Can anyone pls tell me the solution?

Read-Only Author Reinhard Keil Posted 19-Jun-2006 07:00 GMT Toolset C51	RE: Problem in interfacing C files withan assembly file in uVision2 IDE Reinhard Keil Your code looks OK to me. Remains the question: is there memory available at CODE 0x2000 / XDATA 0x4000. Maybe this helps a bit: http://www.keil.com/support/docs/1671.htm