C4GX kit dev + TSE without external memory

Hi,

I've got something new.

In SOPC I add an onchip memory named onchip_ssram (@ auto assigned at 0x00080000 to 0x00098fff).

I connect this memory to instruction master and data master (nios) and sgdma_rx.m_write and sgdma_tx.m_read.

I set in cpu, exception adresse to onchip_ssram + offset 0x120.

Build it, compile.

Go to SBT refresh, generate BSP and debug.

The program start but break at :

alt_u8 alt_avalon_sgdma_do_sync_transfer(

alt_sgdma_dev *dev,

alt_sgdma_descriptor *desc)

…

…

…

…

…

/* Wait for the descriptor (chain) to complete */

while ( (IORD_ALTERA_AVALON_SGDMA_STATUS(dev->base) &

ALTERA_AVALON_SGDMA_STATUS_BUSY_MSK) );

…

…

in the file altera_avalon_sgdma.c

It wait for sgdma not busy ???

Someone got an explication or idea.

Thanks.