|ARM Technical Support Knowledge Articles|
Applies to: ARM Development Tools
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I have a problem with programming off-chip Flash devices on STMicroelectronics STR7 devices. It seems that the Flash device cannot be correctly addressed.
How can I solve this issue?
ARM devices with off-chip Flash require the external BUS to be configured properly. Do this with an Init File (in Project — Options for Target — Utilities — Init File) which contains the debug commands required to configure the off-chip Flash before the Flash programming is started. The content depends on the off-chip Flash devices used and on the ARM device that you have.
The following file provides the BUS setup on the STR71x for PC0, PC1 and PC2 address windows with a 16-bit BUS.
// A.20..23 on P2.4..7 (Alternate Push-Pull Outputs + enable CS.0/1 P2.0..1) _WDWORD(0xE0005000, (_RDWORD(0xE0005000) | 0x00F3) ); // PC0 _WDWORD(0xE0005004, (_RDWORD(0xE0005004) | 0x00F3) ); // PC1 _WDWORD(0xE0005008, (_RDWORD(0xE0005008) | 0x00F3) ); // PC2
Article last edited on: 2006-08-01 10:51:07
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