Easy-Downloader V1.1 with SDCC

文章摘要：The batch file s.bat contains, path=c:\sdcc\bin sdcc writer1.c packihx writer1.ihx>writer1.hex The output machine code is hex file with *.ihx extension. We can use a tool, packihx to convert such hex file with *.ihx to *.hex easily. The ez4.1 is suitable for programming the hex file into a 20-pin

Easy-Downloader V1.1 with SDCC,标签：电路图讲解,电路图练习,http://www.88dzw.com

The batch file s.bat contains,

path=c:\sdcc\bin
sdcc writer1.c
packihx writer1.ihx>writer1.hex

The output machine code is hex file with *.ihx extension. We can use a tool, packihx to convert such hex file with *.ihx to *.hex easily.

The ez4.1 is suitable for programming the hex file into a 20-pin microcontrollers, 89C2051/4051. Since the hex file produced by sdcc is not sorted from low address to high address. The old version, EZ31 has bug for such hex file. So I recommened to use EZ4.1 for program loading.

 

schematic:  

Layout in pdf:    

c compiler for 8051:   

firmware:  

HEX file:    

EZDL4:  

orcad files (schematic, layout):    

gerber file:    

资料下载.rar

Errata

• 18 March 2004: found hardware schematic error at MAX232. The error is that pin 2 on the D-SUB 9 connector must be connected to pin 13 on the MAX232, not pin 8. The error had reported by Henrik Olesen, student at the University of Southern Denmark.
  
  Below picture shows how to modify the pcb!
  
  

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