Bug Fixed / Improved Coldfire Lite V3.2

Improved Coldfire Lite V3.2
Updated for Codewarrior 7.2!

During the time I have been using Coldfire Lite in my iMetaf project, I have encountered a number of issues that frequently caused lockups in the application. I managed to fix these issues and made the fixed version of Coldfire Lite available here, so other users can benefit also.

I sent the modifications to Freescale to make them official, but they seem uninterested...

There are a couple of functional enhancements too. For a full list of changes see below.

To find the changes in the code, use the "Compare files" function in Codewarrior (Search → Compare files). Under "Source", choose the root path of the ORIGINAL version of Coldfire Lite V3.2. Under "Destination", select the PATCHED version. Now click "Compare". A window will appear containing a list of files that differ between source and destination. Double-click the files to view the differences in the source code.

Download :

Original version, compile with stack parameter passing (STD_ABI), only works when compiled with Codewarrior for Coldfire Processors versions 7.0.x and 7.1.x

Coldfire Lite V3.2 with patches and functional improvements, dated 2010-05-08, with stack parameter passing

Version modified to use register parameter passing, intended to be compiled with Codewarrior for Coldfire Processors versions 7.2.x, but can also be compiled with older versions when the project settings are set to register parameter passing (REG_ABI), and REG_ABI versions of the libraries are used where applicable.

Coldfire Lite V3.2 with patches and functional improvements, dated 2010-05-08, with register parameter passing

Important note:
Coldfire Lite V3.2 with register parameter passing works fine when compiled with Codewarrior 7.2, but in my project I have experienced problems when using the TCP protocol when setting the compiler optimisation level >1. At levels 0 or 1 everything worked as expected. This problem did not occur when the exact same application was compiled with Codewarrior 7.1.2 (compiled with REG_ABI setting) at any optimisation level, so I suspect a problem with code optimisation in CW7.2 must be the cause.
Update 2010.06.19: the Codewarrior 7.2.1 patch did not fix this problem.

LIST OF CHANGES MADE BY MARC VANDENHENDE, 2010-05-08

mii.h

Added some extra register definitions that are specific to the PHY devices used in the M52259DEMOKIT (KSZ8014) and M52259EVB (DP83640)

MCF52259_sysinit.c

Small bug fix in KSZ8041 PHY initialisation (bug was not harmful to proper functionality).
PHY initialisation now automatically recognises KSZ8041 / DP83640 devices, and can be extended for use with other PHY devices.

LIST OF CHANGES MADE BY MARC VANDENHENDE, 2010-02-15

*.lcf

Updated to reflect some of the comments in TN268.pdf

mcf5xxx_lo.s
cksum.s
tk_util.s

Modified for register based parameter passing

LIST OF CHANGES MADE BY MARC VANDENHENDE, 2009-10-12

MCF52235_sysinit.c

Added basic initialisation code for RTC

MCF52259_sysinit.c

Added basic initialisation code for RTC
Minibus initialisation only for M52259EVB, not for DEMO board

MCF52259_RTC.h

Bug fix : MCF_RTC_RTCGOCU and MCF_RTC_RTCGOCL macros were defined as 16 bit registers. While they actually are 16 bit registers, they must be defined/accessed as 32 bit registers!

stdlib.c

Bug fix in memcmp added, see: http://forums.freescale.com/freescale/board/message?board.id=CFCOMM&thread.id=806

LIST OF CHANGES MADE BY MARC VANDENHENDE, 2009-05-07

MCF52235_sysinit.c

PHY interrupt disabled (interrupt caused reset when ethernet disconnected).

MCF52259_evb_iflash.lcf

Commented out mram definition to allow linking on Codewarrior Special Edition version.

MCF52259_sysinit.c

Original code only contains initialization for M52259EVB PHY (DP83640). Since this PHY is different from the M52259DEMO PHY (KSZ8014), the original code did not work on the DEMO board. Code has been added to initialize the PHY of the demo board (via conditional compilation). Code has also been modified to use the basic PHY registers as much as possible, to improve compatibility between different PHY types.

timeouts.c

Code added to automatically restart DHCP when:

Link returns after being disconnected
DHCP status not in the BOUND state for more than a minute

m_udp.c

Changed MINSOCKET to start at 49152, see http://forums.freescale.com/freescale/board/message?board.id=CFCOMM&thread.id=6321

dhcsetup.c

Added functionality related to auto restarting DHCP.

MENULIB.C

Changed FEC register numbers to their corresponding defined names. (No functional changes)

RESHOST.C

Some cticks wrap around fixes.

TCPAPI.C

Added a timeout to m_connect. Otherwise the system will hang when the connection attempt fails.

TCPUTIL.C

Changed NEXTLPORT_LL to 49152, see http://forums.freescale.com/freescale/board/message?board.id=CFCOMM&thread.id=6321

DHCPCLNT.C

Added function to read back the state of DHCP from external code. Used to check if in BOUND state by the DHCP auto restart routines.

DNSCLNT.C

Fix to make dnc_lookup only return an IP address when there is actually one available. Originally this would also return a (false) IP address when there was no reply from the DNS server or if a fake URL was entered.

+ some more cticks wrap around fixes.

Back to main page

Page updated 2010.06.19