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Messages - michal_dvorak

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µTasker general / Printing float number without standard C library
« on: June 26, 2009, 02:18:13 PM »
Hello,
 does anybody implemented printing of float numbers without standard C library ? (to avoid problems with dynamic memory allocation).

 We have tried to do, started from standard C library function. We have successfuly tested on ARM7 core in 32bit mode (using JTAG debugger), but when we tested on LPC processor in 16bit Thumb mode, it's not give proper results ...

 Does anybody have any suggestion or have already did the same job?

 thank you

 Michal

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NXPTM LPC2XXX and LPC17XX / Re: Ethernet controller
« on: May 21, 2009, 01:00:26 PM »
Hello Mark,
 finally we have successfuly using LAN8700, but there was some troubles around RX_ER pin on PHY chip. It cannot be pulled high during boot-up sequence, otherwise it's not working properly. But LPC processor has default state pull-up on every pins.
 
 I have question to you - does uTasker use this pin P1_14/Ethernet_RX_ER ?? It seems to me that not, despite of there is some initialization in fnConfigEthernet() function ....
 In RMII description there is written, that it's optional pin.

 thank you for replay, Michal

3
NXPTM LPC2XXX and LPC17XX / Re: Ethernet controller
« on: April 09, 2009, 11:03:30 AM »
Hello Mark,
 we have one project with LPC2387 (My colleague Forrest works on that). Due to costs of PHY DP83848 we would like to change to another vendor of PHY -> LAN8700 from SMSC (it's 3 times cheaper than DP83848). It also supports RMII.
 I would to ask you what is your opinion - if it's lot of work to support LAN8700? The errata on first silicon is on LPC processor or on the PHY DP83848?

 thank you, regards, Michal

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