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Altera_Forum's avatar
Altera_Forum
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13 years ago

Configuring TSE & Nichestack

I have Quartus&SBT 11.1, and a board with PHY 83848. I cannot bring up the eth interface with simple socket example. SOPC configuration is good (i hope), but i can't initialize the software: ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

Ok, it seems that dev->descriptor_base is referred to a global variable set it up at alt_sys_init.c by calling a macro that it's defined in altera_avalon_sgdma.h: 

#define ALTERA_AVALON_SGDMA_INSTANCE(name, dev)                         
static alt_sgdma_dev dev =                                              
{                                                                       
  ALT_LLIST_ENTRY,                                                      
  name##_NAME,                                                          
  ((void *)(name##_BASE)),                                              
  ((alt_u32 *) 0x0),                                                    \
  ((alt_u32) 0x0),                                                      
  ((alt_u32) 0x0),                                                      
  ((alt_sgdma_descriptor *) 0x0),                                       
  ((alt_sgdma_descriptor *) 0x0),                                       
  ((void *) 0x0),                                                       
  ((void *) 0x0),                                                       
  ((alt_u16) 0x0)                                                       
};

Plase note that i'm using external descriptor memory.

Bold line is descriptor_base and it's not touched in code after this initialization.

However, if i put the descritor base inside bold line, it stucks again in dma loop, but dev->descritor_base is now correct.

Question: descriptor_base should be the same value for sgdma tx and rx?