Using the Twiddler 4
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t4_errorcodes
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Table of Contents
Twiddler 4 Error Codes
In the event of product damage, part failure or firmware issue, the Twiddler will go into an Error state and blink red. Decoding the blinks will allow you to pinpoint the issue.
The LEDs are named when looking at the Twiddler 4 in an upright position.
[LED 1] [LED 2] [LED 3]
First, there is a rapidly flashing LED pattern; followed by a slow-blinking numbered code. Take note of which LEDs are blinking red, they indicate the type of error that is occurring.
1st pattern – Rapid Flashing indicating type of failure
| LED 1 | LED 2 | LED 3 | Error Type |
|---|---|---|---|
| RED | 1: Hardware | ||
| RED | 2: Software | ||
| RED | RED | 3: Bluetooth | |
| RED | 4: Initialization |
2nd pattern – Slow Flashing indicating failure point
Hardware (L3)
| L1 | L2 | L3 | Failure Point |
|---|---|---|---|
| R | ERR_HW_I2SINIT | ||
| R-R | ERR_HW_I2C_WR | ||
| R-R-R | ERR_HW_I2C_RDS | ||
| R-R-R-R | ERR_HW_PAW_INIT |
Software (L2)
| L1 | L2 | L3 | Failure Point |
|---|---|---|---|
| R | ERR_SW_APPHANDLER |
Bluetooth (L2 & L3)
| L1 | L2 | L3 | Failure Point |
|---|---|---|---|
| R | ERR_BLE_ADV_START | ||
| R-R | ERR_BLE_ADV_PEER_ADDR_REPLY | ||
| R-R-R | ERR_BLE_ADV_WHITELIST_REPLY | ||
| R | ERR_BLE_PM_ID_LIST | ||
| R | R | ERR_BLE_PM_WHITELIST_GET | |
| R | R-R | ERR_BLE_PM_WHITELIST_SET | |
| R | R-R-R | ERR_BLE_PM_DATA_BONDING_LOAD | |
| R | R-R-R-R | ERR_BLE_PM_DEVICE_IDENTITIES_SET | |
| R | R-R-R-R-R | ERR_BLE_PM_PEERS_DELETE | |
| R-R | ERR_BLE_EVT_GAPCONNECTED_QWR_CONN_HANDLE_ASSIGN | ||
| R-R | R | ERR_BLE_EVT_GAP_PHY_REQ_PHY_UPDATE | |
| R-R | R-R | ERR_BLE_EVT_GATTC_TIMEOUT_DISCONNECT | |
| R-R | R-R-R | ERR_BLE_EVT_GATTS_TIMEOUT_DISCONNECT | |
| R-R | R-R-R-R | ERR_BLE_EVT_HIDS_OUTP_REP_GET | |
| R-R-R | ERR_BLE_ERRORHANDLER_HIDS | ||
| R-R-R | R | ERR_BLE_ERRORHANDLER_PARAMS | |
| R-R-R | R-R | ERR_BLE_ERRORHANDLER_NRF_QWR | |
| R-R-R | R-R-R | ERR_BLE_ERRORHANDLER_ADV |
Initialization (L1)
| L1 | L2 | L3 | Failure Point |
|---|---|---|---|
| R | ERR_INIT_I2C_INIT | ||
| R-R | ERR_INIT_NRF_DRV_CLK_INIT | ||
| R-R-R | ERR_INIT_NRF_PWR_MGMT_INIT | ||
| R | ERR_INIT_BLE_GAP_NAME_SET | ||
| R | R | ERR_INIT_BLE_GAP_APPEARANCE_SET | |
| R | R-R | ERR_INIT_BLE_GAP_PCCP_SET | |
| R | R-R-R | ERR_INIT_BLE_DIS_INIT | |
| R | R-R-R-R | ERR_INIT_BLE_BAS_INIT | |
| R | R-R-R-R-R | ERR_INIT_BLE_QWR_INIT | |
| R | R | ERR_INIT_BLE_GAP_PARAMS | |
| R | R | R | ERR_INIT_BLE_GATT |
| R | R | R-R | ERR_INIT_BLE_CONN_PARAMS_INIT |
| R | R | R-R-R | ERR_INIT_BLE_HIDS |
| R | R | R-R-R-R | ERR_INIT_BLE_ADV_INIT |
| R | R | R-R-R-R-R | ERR_INIT_BLE_NRF_SDH_EN_REQ |
| R | R-R | ERR_INIT_BLE_NRF_SDH_BLE_DEFAULT_CFG_SET | |
| R | R-R | R | ERR_INIT_BLE_NRF_SDH_BLE_EN |
| R | R-R | R-R | ERR_INIT_BLE_PM_INIT |
| R | R-R | R-R-R | ERR_INIT_BLE_PM_SEC_PARAMS_SET |
| R | R-R | R-R-R-R | ERR_INIT_BLE_PM_REGISTER |
| R-R | ERR_INIT_APP_USBD_INIT | ||
| R-R | R | ERR_INIT_APP_USBD_CLASS_APPEND_MOUSE | |
| R-R | R-R | ERR_INIT_APP_USBD_CLASS_APPEND_KB | |
| R-R | R-R-R | ERR_INIT_APP_USBD_CLASS_APPEND_MSD | |
| R-R | R-R-R-R | ERR_INIT_APP_USBD_CLASS_APPEND_CONSUMER | |
| R-R | R-R-R-R-R | ERR_INIT_APP_USBD_POWER_EVTS_EN | |
| R-R-R | ERR_INIT_APP_TIMER_INIT | ||
| R-R-R | R | ERR_INIT_APP_TIMER_CREATE | |
| R-R-R | R-R | ERR_INIT_APP_TIMER_START |
Error Example
Test Case: Power up device WITHOUT connecting U3 (PAW OFN) to J4
Expected Blink Pattern:
- R,G,B then,
- L3 blinking rapidly indicating a hardware fault,
- then L3 blinking Slowly 4 times indicating ERR_HW_PAW_INIT.
t4_errorcodes.1729890037.txt.gz · Last modified: by eric