On Fri, May 06, 2005 at 08:51:17PM +0200, Marcel Ovidiu Achim wrote:
Hi all,
I am using eCos on an Atmel EB55 board. For an application I need to
store data into the on board flash device. My compiled code seams to
do an unaligned access to the on board flash which is enabled by the
NCS0 line.
This is a very simple code for a better understanding.
// Set the EBI_CSR0 register for 16 bit access etc.
HAL_WRITE_UINT32(0xFFE00000, 0x010030A1);
// Write 0xAA to address 0x555 of into the flash device.
// Note: this is not the whole prog. seq.
HAL_WRITE_UINT16(0x01000000 + 0x555, 0xAA);
I don't think this is allowed. You have to do 16 bit accesses on 16
bit aligned addresses. Maybe you want to do:
HAL_WRITE_UINT8(0x01000000 + 0x555, 0xAA);
HAL_WRITE_UINT8(0x01000000 + 0x556, 0x00);
which will acheive the same but will do it in a legal way.
Andrew