Compact Flash Card

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.