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WICED Studio Wi-Fi Combo

towa_2281366
New Contributor II

Hi,

Hi, i'm using WICED-Studio-6.2  & CYW43438A1 for my project,  it works fine and ready for mass production now. 

For some reason, i need to  pre-burn a 4 bytes vendor specific data to the OTP region which could be read back in my program.

wl cisdump before burn:

pastedImage_3.png

With reference of "OTP Programming and NVRAM Development in SDIO Mode .pdf" , i burned

some bytes to 2 modules with command: wl cisupdate xx xx

wl cisdump after burn of (modue_1):

pastedImage_4.png

wl cisdump after burn (module_2):

pastedImage_5.png

  

My question is : How can i read the data back in my program ? I tried wwd_wifi_get_iovar_value with tag string like "vendid" or "customvar1" , but both failed.

Thanks!!!

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1 Solution
PriyaM_16
Moderator
Moderator

There is a provision to pass length parameter in cisdump to dump particular bytes but it is not working.

As a workaround, we can modify cisdump function and print only the contents which are required. Please refer the attached file for wlu_cisread_offset() function which takes the offset and no. of bytes as argument and prints the data. You can copy the same data into a buffer and access it in your application

static int

wlu_cisread_offset(void *wl, cmd_t *cmd, char **argv)

{

#if defined(_CFE_)

return CFE_ERR_UNSUPPORTED;

#elif defined(_HNDRTE_) || defined(__IOPOS__)

return 0;

#else

char *bufp, *endptr;

int ret = 0;

uint32 off;

uint32 updatelen;

uint32 i;

cis_rw_t cish;

UNUSED_PARAMETER(cmd);

/* validate arg count */

if (!*++argv || !argv[1])

return BCME_USAGE_ERROR;

/* grab byte offset */

off = (uint32)strtol(argv[0], &endptr, 0);

if (*endptr != '\0')

return BCME_USAGE_ERROR;

updatelen = (uint32)strtol(argv[1], NULL, 0);

fprintf(stderr, "number of digits to be read:%d and offset:%d\n", updatelen, off);

    /* check for a length argument */

    if (updatelen & 1) {

        printf("Invalid byte count %d, must be even\n", updatelen);

        ret = BCME_BADARG;

        goto done;

    }

/* Prepare the read info */

cish.source = 0; cish.byteoff = 0; cish.nbytes = 0;

/* set up the buffer and do the get */

memset(buf, 0, WLC_IOCTL_MAXLEN);

    strcpy(buf, "cisdump");

    bufp = buf + strlen("cisdump") + 1;

    memcpy(bufp, (char*)&cish, sizeof(cish));

    bufp += sizeof(cish);

    ret = wl_get(wl, WLC_GET_VAR, buf, (int)((int)(bufp - buf) + (SROM_MAX)));

    if (ret < 0) {

        fprintf(stderr, "Failed cisdump request: %d\n", ret);

        goto done;

    }

    /* pull off the cis_rw_t */

    bufp = buf;

    memcpy((char*)&cish, bufp, sizeof(cish));

    cish.source = dtoh32(cish.source);

    cish.byteoff = dtoh32(cish.byteoff);

    cish.nbytes = dtoh32(cish.nbytes);

    /* move past to the data */

   bufp += sizeof(cish);

    printf("Source: %d (%s)\n", cish.source,

          (cish.source == WLC_CIS_DEFAULT) ? "Built-in default" :

          (cish.source == WLC_CIS_SROM) ? "External SPROM" :

          (cish.source == WLC_CIS_OTP) ? "Internal OTP" : "Unknown?");

    fprintf(stderr, "Printing the data at offset: %d\n", off);

    for (i = off; i < (updatelen + off); i++) {

        if ((i % 😎 == 0)

            printf("\n");

        printf("0x%02x ", (uint8)bufp);

    }

    printf("\n");

done:

return ret;

#endif /* _CFE_ */

}

For testing purpose use the attached file and use the following command:

> wl cisread_offset 10 4

number of digits to be read:4 and offset:10

Source: 2 (Internal OTP)

Printing the data at offset: 10

0x83 0xab 0x80 0x02

View solution in original post

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1 Reply
PriyaM_16
Moderator
Moderator

There is a provision to pass length parameter in cisdump to dump particular bytes but it is not working.

As a workaround, we can modify cisdump function and print only the contents which are required. Please refer the attached file for wlu_cisread_offset() function which takes the offset and no. of bytes as argument and prints the data. You can copy the same data into a buffer and access it in your application

static int

wlu_cisread_offset(void *wl, cmd_t *cmd, char **argv)

{

#if defined(_CFE_)

return CFE_ERR_UNSUPPORTED;

#elif defined(_HNDRTE_) || defined(__IOPOS__)

return 0;

#else

char *bufp, *endptr;

int ret = 0;

uint32 off;

uint32 updatelen;

uint32 i;

cis_rw_t cish;

UNUSED_PARAMETER(cmd);

/* validate arg count */

if (!*++argv || !argv[1])

return BCME_USAGE_ERROR;

/* grab byte offset */

off = (uint32)strtol(argv[0], &endptr, 0);

if (*endptr != '\0')

return BCME_USAGE_ERROR;

updatelen = (uint32)strtol(argv[1], NULL, 0);

fprintf(stderr, "number of digits to be read:%d and offset:%d\n", updatelen, off);

    /* check for a length argument */

    if (updatelen & 1) {

        printf("Invalid byte count %d, must be even\n", updatelen);

        ret = BCME_BADARG;

        goto done;

    }

/* Prepare the read info */

cish.source = 0; cish.byteoff = 0; cish.nbytes = 0;

/* set up the buffer and do the get */

memset(buf, 0, WLC_IOCTL_MAXLEN);

    strcpy(buf, "cisdump");

    bufp = buf + strlen("cisdump") + 1;

    memcpy(bufp, (char*)&cish, sizeof(cish));

    bufp += sizeof(cish);

    ret = wl_get(wl, WLC_GET_VAR, buf, (int)((int)(bufp - buf) + (SROM_MAX)));

    if (ret < 0) {

        fprintf(stderr, "Failed cisdump request: %d\n", ret);

        goto done;

    }

    /* pull off the cis_rw_t */

    bufp = buf;

    memcpy((char*)&cish, bufp, sizeof(cish));

    cish.source = dtoh32(cish.source);

    cish.byteoff = dtoh32(cish.byteoff);

    cish.nbytes = dtoh32(cish.nbytes);

    /* move past to the data */

   bufp += sizeof(cish);

    printf("Source: %d (%s)\n", cish.source,

          (cish.source == WLC_CIS_DEFAULT) ? "Built-in default" :

          (cish.source == WLC_CIS_SROM) ? "External SPROM" :

          (cish.source == WLC_CIS_OTP) ? "Internal OTP" : "Unknown?");

    fprintf(stderr, "Printing the data at offset: %d\n", off);

    for (i = off; i < (updatelen + off); i++) {

        if ((i % 😎 == 0)

            printf("\n");

        printf("0x%02x ", (uint8)bufp);

    }

    printf("\n");

done:

return ret;

#endif /* _CFE_ */

}

For testing purpose use the attached file and use the following command:

> wl cisread_offset 10 4

number of digits to be read:4 and offset:10

Source: 2 (Internal OTP)

Printing the data at offset: 10

0x83 0xab 0x80 0x02

View solution in original post

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