CC2652P7: OSAL SNV erase multi Customer's NV IDs

Hi !

Flash has two sections that the user can interact with : Simple NV (SNV) Area and Application’s Non Volatile Storage (NVS) Area. SNV Area is used by the Bluetooth stack to store bonding information, but for small amount of data (below 100 bytes).

Since you want to store 1 kB of data, we recommend using the NVS Area. The NVS has API function for reading, writing and erasing memory, and more, which would fit your needs. You could define a new NVS area in SysConfig, and use the API to write, read and erase your data.

You can read more about how to handle the flash in the chapter about Flash memory in the User Guide.

Kind regards,
Maxence

Hi Maxence,

Lea said:

but for small amount of data (below 100 bytes).

I have already increased the NV storage size.

Lea said:

Since you want to store 1 kB of data, we recommend using the NVS Area. The NVS has API function for reading, writing and erasing memory, and more, which would fit your needs. You could define a new NVS area in SysConfig, and use the API to write, read and erase your data.

To work around the NVS issue, I erased the flash and loaded the image via UniFlash, then performed an initial reset of the board. However, the flash read status and data appeared to be incorrect. A subsequent reset of the board the same incorrect results.

NVS_Handle nvsHandle;
NVS_Attrs regionAttrs;
NVS_Params nvsParams;
uint8_t rgbVal[4];
uint8_t rgbVal2[4];

void rgbVal_Init(void) {
//--------------------//

  NVS_init();
  NVS_Params_init(&nvsParams);

  nvsHandle = NVS_open(CONFIG_NVS_0, &nvsParams);
  if (nvsHandle == NULL) {
    while (1) {}
  }

  NVS_getAttrs(nvsHandle, &regionAttrs);

  uint16_t status = SUCCESS;
  uint16_t status2 = SUCCESS;

  status = osal_snv_read(NVID_GPWM, NVGPWM_SIZE, (uint8_t *)&rgbVal);
  status2 = NVS_read(nvsHandle, 0, (uint8_t *)&rgbVal2, 4);
  
  Log_info2("read status %x, %x", status, status2);
  Log_info4("dbg  %x, %x, %x, %x", rgbVal[0], rgbVal[1], rgbVal[2], rgbVal[3]);
  Log_info4("dbg2  %x, %x, %x, %x", rgbVal2[0], rgbVal2[1], rgbVal2[2], rgbVal2[3]);
  
  if (status != SUCCESS) {
    rgbVal[IDX_R_LED] = StatePWM_Val[STATE_POWER_ON_INIT][IDX_R_LED];
    rgbVal[IDX_G_LED] = StatePWM_Val[STATE_POWER_ON_INIT][IDX_G_LED];
    rgbVal[IDX_B_LED] = StatePWM_Val[STATE_POWER_ON_INIT][IDX_B_LED];
    rgbVal[IDX_W_LED] = StatePWM_Val[STATE_POWER_ON_INIT][IDX_W_LED];
    status = osal_snv_write(NVID_GPWM, NVGPWM_SIZE, (uint8_t *)&rgbVal);
  } // !SUCCESS

  if (status2 != SUCCESS) {
    rgbVal2[IDX_R_LED] = 0xAA;
    rgbVal2[IDX_G_LED] = 0xBB;
    rgbVal2[IDX_B_LED] = 0xCC;
    rgbVal2[IDX_W_LED] = 0xDD;
    status2 = NVS_write(nvsHandle, 0, (uint8_t *)rgbVal2, 4, NVS_WRITE_POST_VERIFY);
  }

  Log_info2("write status %x, %x", status, status2);
  Log_info4("dbg  %x, %x, %x, %x", rgbVal[0], rgbVal[1], rgbVal[2], rgbVal[3]);
  Log_info4("dbg2  %x, %x, %x, %x", rgbVal2[0], rgbVal2[1], rgbVal2[2], rgbVal2[3]);

  NVS_close(nvsHandle);
  
} // void rgbVal_Init(void)

Best regards,

Bank

Hi,

Is it possible that your CONFIG_NVS_0 is overwritten by CONFIG_NVSINTERNAL or CONFIG_NVSINTERNAL ?
Could you send me sysconfig screenshot of those configs ?

Kind regards,
Maxence

Hi Maxence,

FYI

Best regards,

Bank

Hi,

Sorry for the late reply. Could you check if you can write into the NVS and then read it right after to see if this works ? Your problem right now is that the NVS value is not conserved after a power cycle, right ?

Here's the code you could use :

NVS_Handle nvsHandle;
NVS_Attrs regionAttrs;
NVS_Params nvsParams;

void rgbVal_Init(void) {
//--------------------//

  NVS_init();
  NVS_Params_init(&nvsParams);

  nvsHandle = NVS_open(CONFIG_NVS_0, &nvsParams);
  if (nvsHandle == NULL) {
    while (1) {}
  }

  NVS_getAttrs(nvsHandle, &regionAttrs);
  
  uint16_t status = SUCCESS;
  
  uint8_t dataArray[4] = {0xCA, 0xFE, 0xBE, 0xEF};
  status = NVS_write(nvsHandle, 0, (uint8_t *)dataArray, 4, NVS_WRITE_POST_VERIFY);

  Log_info2("write status %x", status);

  uint8_t dataArrayRead[4] = {0x00, 0x00, 0x00, 0x00};
  status = NVS_read(nvsHandle, 0, (uint8_t *)dataArrayRead, 4);
  
  Log_info2("read status %x", status);
  Log_info2("values read : %x, %x, %x, %x", 
    dataArrayRead[0], dataArrayRead[1], dataArrayRead[2], dataArrayRead[3]);
  
  NVS_close(nvsHandle);
  
} // void rgbVal_Init(void)

Kind regards,
Maxence