Compact Flash Card

[Altera_Forum]

Hi ecos community, 

 I have a Nios dev board (Stratix edition) running an eCos application that logs data onto a Compact Flash card.  My application runs well, but I am trying to improve it in the way it deals with the Compact Flash card.  I would like my application to be able to get info on the CF card, ie card size, card maker, free space etc. I suspect the CF driver does not support this at present, but if it does I would like to know how.  Also, the CF driver supports interrupt driven card insertion functionality for card initialization, but on my board this does not work, as far as I can tell no interrupt is generated when a card is inserted. If anyone has experience in this area I would like to hear about it.  More detail follows...  From the API the following code should allow access to CF info:  error = cyg_io_lookup("/dev/cfa/1",&cf_handle); // get handle to CF error = cyg_io_get_config(&cf_handle,0,xbuf,&len);  but the function alt_avalon_cf_get_config in altera_avalon_cf.c is just an empty stub, however the line of execution never appears to reach this code.  Is there anyone else out there using CF cards?  Peter

[Altera_Forum]

There was a mistake in the second line of code, the correct code is below: 

 error = cyg_io_lookup("/dev/cfa/1",&cf_handle); // get handle to CF error = cyg_io_get_config(cf_handle,0,xbuf,&len); // call for info, if any

[Altera_Forum]

The following code fragments are a first attempt at providing access to CF information. The alt_avalon_cf_get_config stub is filled out and eCos cleaned and rebuilt. 

 // fill out stub in altera_avalon_cf.c // Altera Avalon compact flash driver   alt_avalon_cf_get_config(disk_channel *chan,   cyg_uint32 key,  const void *xbuf, //cyg_disk_info_t;  cyg_uint32 *len) {   cyg_disk_info_t *info = chan->info; // info is a pointer  cyg_disk_info_t *buf = (cyg_disk_info_t *) xbuf;    cyg_disk_identify_t *ident = &chan->info->ident;   Cyg_ErrNo res = ENOERR;    D("alt_avalon_cf_get_config\n");  if (!chan->init)  return -EINVAL;  if (*len < sizeof(cyg_disk_info_t))  return -EINVAL;    *buf = *info;  *len = sizeof(cyg_disk_info_t);    //D((" serial = &#39;%s&#39;\n", ident->serial));   //D((" firmware rev = &#39;%s&#39;\n", ident->firmware_rev));   D(" model num = &#39;%s&#39;\n", ident->model_num);   D(" block_size = %d\n", info->block_size);  D(" blocks_num = %d\n", info->blocks_num);    return res; }   Here is a code fragment to access the info. In this case the block size, number of blocks and CF model string.  //------------------------------------------------------ // code to access CF info // use API call &#39;cyg_io_get_config&#39;  // information on the CF card cyg_disk_info_t cf_info;  char cf_model[20];  // later on...   { // get CF card info  cyg_io_handle_t cf_handle;  void *xbuf = (void *)&cf_info; //cyg_disk_info_t  Cyg_ErrNo error;    cyg_uint32 len = sizeof(cyg_disk_info_t);    error = cyg_io_lookup("/dev/cfa/1", &cf_handle);  if(error!=0) printf("lookup error:%i\n",error);    else   {   error = cyg_io_get_config(cf_handle,0,xbuf,&len); //  printf("cf get_config error: %i %i\n",error,-EINVAL); // should get -EINVAL    //cf_info_ptr = *(cyg_disk_info_t *)xbuf;  // get useful info  block_size = cf_info.block_size;  blocks_num = cf_info.blocks_num;  strncpy(cf_model,cf_info.ident.model_num,16);  printf("block size:%i num_blocks:%i %s\n"  ,cf_info.block_size,cf_info.blocks_num,cf_model);    }  Looks like I get to answer my own questions.