|
|||||||||||
Technical Support Support Resources
Product Information |
MCB2300: Using LPC2378 Ethernet Memory as RAMInformation in this knowledgebase article applies to:
QUESTIONMy application does not require Ethernet connectivity, and I want to use the additional 16 Mbytes of memory at 0x7FE00000 as data RAM available on the LPC2378 device. I enabled the Ethernet RAM as follows: PCONP |= 0x40000000; /* Enable Ethernet RAM Block */ but when I debug my application. I get Data Abort(DAbt) exceptions that point to the Ethernet RAM. What can cause this? ANSWERYou are enabling the Ethernet RAM block in your C code, which means it was not enabled during the application startup initialization code. Because the LPC2378 disables this RAM during a reset, you must enable it in the LPC2300.S startup module. To do this, add the following code to the start of the Reset_Handler routine: ; Reset Handler EXPORT Reset_Handler Reset_Handler PCONP EQU 0xE01FC0C4 ; Power Control for Peripherals LDR R0, =PCONP LDR R1, [R0] ORRS R1, R1, #0x40000000 ; Turn on Ethernet RAM Block STR R1, [R0] . . . Now the initialization code can access the Ethernet RAM. MORE INFORMATIONSEE ALSO
Last Reviewed: Thursday, February 11, 2021 | ||||||||||
|
Arm’s Privacy Policy has been updated. By continuing to use our site, you consent to Arm’s Privacy Policy. Please review our Privacy Policy to learn more about our collection, use and transfers
of your data.