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NiLe_4796031
Level 2
Level 2
10 replies posted 5 replies posted 5 questions asked

Based on example CE222046, I'm trying to use BLE 2M PHY. SetPhy fails with 0x2A, which if I followed the documentation correctly means:
"2.42 DIFFERENT TRANSACTION COLLISION (0x2A)

The Different Transaction Collision error code indicates that an LMP transaction or LL Procedure was started that collides with an ongoing transaction."

The reality is that I want to always force 2M and never have a 1M connection. Ideally we'd advertise using 2M PHY. We do use Cy_BLE_SetDefaultPhy() in the handler for CY_BLE_EVT_STACK_ON.

The Cy_BLE_SetPhy() is called from inside the ble callback for CY_BLE_EVT_DATA_LENGTH_CHANGE, same as the example code. Here's the relevant code in my callback:

        case CY_BLE_EVT_DATA_LENGTH_CHANGE: {

            debug_string("data length change\r\n");

            cy_stc_ble_data_length_change_event_param_t *param = (cy_stc_ble_data_length_change_event_param_t *)event_param;

            debug_string("rx = ");

            debug_int32(param->connMaxRxOctets);

            debug_string(", tx = ");

            debug_int32(param->connMaxTxOctets);

            debug_string(" bytes\r\nrx = ");

            debug_int32(param->connMaxRxTime);

            debug_string(", tx = ");

            debug_int32(param->connMaxTxTime);

            debug_string("\r\n");

            static cy_stc_ble_set_phy_info_t phyParam;

            phyParam.bdHandle = key_info.SecKeyParam.bdHandle;

            phyParam.allPhyMask = CY_BLE_PHY_NO_PREF_MASK_NONE;  // Require our pref for both TX and RX.

            phyParam.phyOption = 0;

            phyParam.rxPhyMask = CY_BLE_PHY_MASK_LE_2M;

            phyParam.txPhyMask = CY_BLE_PHY_MASK_LE_2M;

            Cy_BLE_EnablePhyUpdateFeature();

            cy_en_ble_api_result_t api_result = Cy_BLE_SetPhy(&phyParam);

            if (api_result != CY_BLE_SUCCESS) {

                debug_string("failed to set phy to 2m\r\n");

                debug_int32(api_result);

                debug_string("\r\n");

            }

            break;

        }

        case CY_BLE_EVT_SET_PHY_COMPLETE: {

            debug_string("set phy complete\r\n");

            cy_stc_ble_events_param_generic_t *param = (cy_stc_ble_events_param_generic_t *)event_param;

            debug_string("status = ");

            debug_int32(param->status);

            debug_string("\r\n");

            Cy_BLE_GetPhy(notify_packet.connHandle.bdHandle);

            break;

        }

        case CY_BLE_EVT_PHY_UPDATE_COMPLETE: {

            debug_string("phy update complete\r\n");

            cy_stc_ble_events_param_generic_t *param = (cy_stc_ble_events_param_generic_t *)event_param;

            cy_stc_ble_phy_param_t *phy_params = (cy_stc_ble_phy_param_t *)param->eventParams;

            if (param->status == 0) {

                debug_string("new phy: ");

                debug_int8(phy_params->txPhyMask);

                debug_int8(phy_params->rxPhyMask);

                debug_string("\r\n");

            } else {

                debug_string("failed, status = ");

                debug_int32(param->status);

                debug_string("\r\n");

            }

            Cy_BLE_GetPhy(notify_packet.connHandle.bdHandle);

            break;

        }

        case CY_BLE_EVT_GET_PHY_COMPLETE: {

            debug_string("get phy complete\r\n");

            cy_stc_ble_events_param_generic_t *param = (cy_stc_ble_events_param_generic_t *)event_param;

            cy_stc_ble_phy_param_t *phy_params = (cy_stc_ble_phy_param_t *)param->eventParams;

            debug_string("get phy: ");

            debug_int8(phy_params->txPhyMask);

            debug_int8(phy_params->rxPhyMask);

            debug_string("\r\n");

            break;

        }

The output from those debugs:

set phy complete

status = 00000000

get phy complete

get phy: 0101

data length change

rx = 0000001B, tx = 000000FB bytes

rx = 00000148, tx = 00000848

set phy complete

status = 0000002A

get phy complete

get phy: 0101

data length change

rx = 0000001B, tx = 000000FB bytes

rx = 00000148, tx = 00000848

set phy complete

status = 00000000

get phy complete

get phy: 0101

phy update complete

failed, status = 00000023

get phy complete

get phy: 0101

Why does the first "set phy complete" come with a status of 0x2A? Why does the first phy update show a status of 0x23?

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1 Reply
Yugandhar
Moderator
Moderator
Moderator
1000 replies posted 5 likes given First comment on blog

Hello NiLe_4796031 ,

Please check your application with the CE222046_Throughput_Measurement example project from the PSoC Creator and let me know your observations. If you are still facing the issue then please share your complete project.

Thanks,
P Yugandhar.

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