TUSB422: Sink profile negotiation

Devan Lippman

Part Number: TUSB422

Hello,

I'm trying set up a TUSB422 device to sink at higher voltages. Something appears to be incorrect in the negotiation.

I see the capabilities message and corresponding Request message as follows:

Rx msg len: 12-bytes, type: 1 (SRC_CAPS)
MsgID: 0
rx_buf: 0x2c 91 01 08 2c c1 03 00 fa b0 04 00
PE_SNK_EVALUATE_CAPABILITY
$$$tcpm_connection_state_machine: state_change = 0, state = 0xa.
timer_cancel_no_response
PDO[0] = 0x0801912c
Remote SRC_CAPS externally powered bit is set.
PDO-1 Fixed, 5000 - 5000 mV, 3000 mA, 15000 mW
PDO[1] = 0x0003c12c
PDO-2 Fixed, 12000 - 12000 mV, 3000 mA, 36000 mW
PDO[2] = 0x0004b0fa
PDO-3 Fixed, 15000 - 15000 mV, 2500 mA, 37500 mW
PDO-3 0x0004b0fa selected
selected_snk_pdo_idx: 2
PE_SNK_SELECT_CAPABILITY
Tx msg_type: 2 (REQUEST), sop: 0, ndo: 1
buf[0-2]: 0x06 42 10

After this though I am not seeing any Accept, Reject or Ready Message. Instead the low voltage Alert appears to fire:

->P0 IRQ: 0x012a
Lo-Voltage alarm
Hard Reset Rx'd.
PE_SNK_TRANSITION_TO_DEFAULT

Is there actually any way to see in SW stack that the message was sent correctly (ie TUSB422 received GoodCRC)?

Full log output attached

Fullscreen PDNegotiationFailed.txt Download

 ________  _________  ____ ___  ___
/_  __/ / / / __/ _ )/ / /|_  ||_  |
 / / / /_/ /\ \/ _  /_  _/ __// __/
/_/  \____/___/____/ /_//____/____/

PD Stack v0.98
=====================================
TCPM Init
UNATTACHED_SRC
Port[0]: addr: 0x20, DRP, Rp: 3.0A, Flags: Try-SNK.
VID: 0x0451
PID: 0x0422
DID: 0x0100
REV: 0x02
PD Init
TUSB Init Complete
->P0 IRQ: 0x0002
*****TCPC_ALERT_POWER_STATUS****
pwr_status = 0x00
$$$tcpm_connection_state_machine: state_change = 1, state = 0x0.
SRC VBUS off.
tcpm_source_vbus_disable()SNK VBUS off.
tcpm_hal_vbus_disable(port, VBUS_SNK);
tcpm_set_voltage_alarm_hi: 25575mV
tcpm_set_voltage_alarm_lo: 800mV
tcpm_set_sink_disconnect_threshold: 0mV
PE_UNATTACHED
tcpm_mux_controlMux: Disable
pe_dummy_state_entry
->P0 IRQ: 0x0100
Lo-Voltage alarm
$$$tcpm_connection_state_machine: state_change = 0, state = 0x0.
        Random Number:

27 F4 AC 3E 69 C8 96 5F  64 48 78 D8 57 6F 44 0A  |  '..>i.._dHx.WoD.

94 51 0D D2 D6 D9 2A 89  37 13 DB 0E 78 8E 4D 58  |  .Q....*.7...x.MX

        Random Number:

A3 5E 30 67 07 1E 34 AD  EC A5 CF 90 72 65 2E A5  |  .^0g..4.....re..

47 C9 AF BE 98 FA 87 59  59 86 15 AF 8D 9C 1E 2F  |  G......YY....../

        Random Number:

6B 5F 84 69 62 5C B1 9D  14 C6 70 05 F6 29 8A 7D  |  k_.ib\....p..).}

70 FE 16 E9 27 03 0F 20  0F DD E8 C5 20 F9 9A 01  |  p...'.. .... ...

        Random Number:

22 5B 5A 50 3C B0 D1 F2  B6 D8 22 A7 6F A2 42 22  |  "[ZP<.....".o.B"

59 60 D9 AB 63 CD 08 DB  3B D3 E8 C6 48 3B 14 D9  |  Y`..c...;...H;..

->P0 IRQ: 0x0001
CC status = 0x10
$$$tcpm_connection_state_machine: state_change = 0, state = 0x0.
->P0 IRQ: 0x0001
CC status = 0x13
ATTACH_WAIT_SNK
$$$tcpm_connection_state_machine: state_change = 1, state = 0x3.
timeout_cc_debounce CC status = 0x13
ATTACHED_SNK
$$$tcpm_connection_state_machine: state_change = 1, state = 0xa.
SRC current: 3.0A
tcpm_set_voltage_alarm_lo: 4000mV
-> SNK VBUS.
tcpm_hal_vbus_enable(port, VBUS_SNK);
PE_SNK_STARTUP
tcpm_mux_controlMux: USB
PE_SNK_DISCOVERY
PE_SNK_WAIT_FOR_CAPS
tcpm_set_voltage_alarm_lo: 4000mV
Enable PD Rx: SOP'=0, SOP"=0
->P0 IRQ: 0x0002
*****TCPC_ALERT_POWER_STATUS****
pwr_status = 0x0c
VBUS present
$$$tcpm_connection_state_machine: state_change = 0, state = 0xa.
->P0 IRQ: 0x0004
PD Rx
Rx msg len: 12-bytes, type: 1 (SRC_CAPS)
MsgID: 0
rx_buf: 0x2c 91 01 08 2c c1 03 00 fa b0 04 00
PE_SNK_EVALUATE_CAPABILITY
$$$tcpm_connection_state_machine: state_change = 0, state = 0xa.
timer_cancel_no_response
PDO[0] = 0x0801912c
Remote SRC_CAPS externally powered bit is set.
PDO-1 Fixed, 5000 - 5000 mV, 3000 mA, 15000 mW
PDO[1] = 0x0003c12c
PDO-2 Fixed, 12000 - 12000 mV, 3000 mA, 36000 mW
PDO[2] = 0x0004b0fa
PDO-3 Fixed, 15000 - 15000 mV, 2500 mA, 37500 mW
PDO-3 0x0004b0fa selected
selected_snk_pdo_idx: 2
PE_SNK_SELECT_CAPABILITY
Tx msg_type: 2 (REQUEST), sop: 0, ndo: 1
buf[0-2]: 0x06 42 10
->P0 IRQ: 0x012a
Lo-Voltage alarm
Hard Reset Rx'd.
PE_SNK_TRANSITION_TO_DEFAULT
*****TCPC_ALERT_POWER_STATUS****
pwr_status = 0x08
VBUS not present
UNATTACHED_SNK
$$$tcpm_connection_state_machine: state_change = 1, state = 0x1.
SRC VBUS off.
tcpm_source_vbus_disable()SNK VBUS off.
tcpm_hal_vbus_disable(port, VBUS_SNK);
tcpm_set_voltage_alarm_hi: 25575mV
tcpm_set_voltage_alarm_lo: 800mV
tcpm_set_sink_disconnect_threshold: 0mV
PE_UNATTACHED
tcpm_mux_controlMux: Disable
pe_dummy_state_entry
->P0 IRQ: 0x0101
Lo-Voltage alarm
CC status = 0x30
$$$tcpm_connection_state_machine: state_change = 0, state = 0x1.
->P0 IRQ: 0x0001
CC status = 0x13
ATTACH_WAIT_SNK
$$$tcpm_connection_state_machine: state_change = 1, state = 0x3.
timeout_cc_debounce CC status = 0x13
$$$tcpm_connection_state_machine: state_change = 0, state = 0x3.
->P0 IRQ: 0x0002
*****TCPC_ALERT_POWER_STATUS****
pwr_status = 0x08
VBUS not present
$$$tcpm_connection_state_machine: state_change = 0, state = 0x3.
->P0 IRQ: 0x0002
*****TCPC_ALERT_POWER_STATUS****
pwr_status = 0x0c
VBUS present
ATTACHED_SNK
$$$tcpm_connection_state_machine: state_change = 1, state = 0xa.
SRC current: 3.0A
tcpm_set_voltage_alarm_lo: 4000mV
-> SNK VBUS.
tcpm_hal_vbus_enable(port, VBUS_SNK);
PE_SNK_STARTUP
tcpm_mux_controlMux: USB
PE_SNK_DISCOVERY
PE_SNK_WAIT_FOR_CAPS
tcpm_set_voltage_alarm_lo: 4000mV
Enable PD Rx: SOP'=0, SOP"=0
->P0 IRQ: 0x0004
PD Rx
Rx msg len: 12-bytes, type: 1 (SRC_CAPS)
MsgID: 0
rx_buf: 0x2c 91 01 08 2c c1 03 00 fa b0 04 00
PE_SNK_EVALUATE_CAPABILITY
$$$tcpm_connection_state_machine: state_change = 0, state = 0xa.
timer_cancel_no_response
PDO[0] = 0x0801912c
Remote SRC_CAPS externally powered bit is set.
PDO-1 Fixed, 5000 - 5000 mV, 3000 mA, 15000 mW
PDO[1] = 0x0003c12c
PDO-2 Fixed, 12000 - 12000 mV, 3000 mA, 36000 mW
PDO[2] = 0x0004b0fa
PDO-3 Fixed, 15000 - 15000 mV, 2500 mA, 37500 mW
PDO-3 0x0004b0fa selected
selected_snk_pdo_idx: 2
PE_SNK_SELECT_CAPABILITY
Tx msg_type: 2 (REQUEST), sop: 0, ndo: 1
buf[0-2]: 0x06 42 10
->P0 IRQ: 0x012a
Lo-Voltage alarm
Hard Reset Rx'd.
PE_SNK_TRANSITION_TO_DEFAULT
*****TCPC_ALERT_POWER_STATUS****
pwr_status = 0x08
VBUS not present
UNATTACHED_SNK
$$$tcpm_connection_state_machine: state_change = 1, state = 0x1.
SRC VBUS off.
tcpm_source_vbus_disable()SNK VBUS off.
tcpm_hal_vbus_disable(port, VBUS_SNK);
tcpm_set_voltage_alarm_hi: 25575mV
tcpm_set_voltage_alarm_lo: 800mV
tcpm_set_sink_disconnect_threshold: 0mV
PE_UNATTACHED
tcpm_mux_controlMux: Disable
pe_dummy_state_entry
->P0 IRQ: 0x0101
Lo-Voltage alarm
CC status = 0x30
$$$tcpm_connection_state_machine: state_change = 0, state = 0x1.
->P0 IRQ: 0x0001
CC status = 0x13
ATTACH_WAIT_SNK
$$$tcpm_connection_state_machine: state_change = 1, state = 0x3.
timeout_cc_debounce CC status = 0x13
$$$tcpm_connection_state_machine: state_change = 0, state = 0x3.
->P0 IRQ: 0x0002
*****TCPC_ALERT_POWER_STATUS****
pwr_status = 0x08
VBUS not present
$$$tcpm_connection_state_machine: state_change = 0, state = 0x3.
->P0 IRQ: 0x0002
*****TCPC_ALERT_POWER_STATUS****
pwr_status = 0x0c
VBUS present
ATTACHED_SNK
$$$tcpm_connection_state_machine: state_change = 1, state = 0xa.
SRC current: 3.0A
tcpm_set_voltage_alarm_lo: 4000mV
-> SNK VBUS.
tcpm_hal_vbus_enable(port, VBUS_SNK);
PE_SNK_STARTUP
tcpm_mux_controlMux: USB
PE_SNK_DISCOVERY
PE_SNK_WAIT_FOR_CAPS
tcpm_set_voltage_alarm_lo: 4000mV
Enable PD Rx: SOP'=0, SOP"=0
->P0 IRQ: 0x0004
PD Rx
Rx msg len: 12-bytes, type: 1 (SRC_CAPS)
MsgID: 0
rx_buf: 0x2c 91 01 08 2c c1 03 00 fa b0 04 00
PE_SNK_EVALUATE_CAPABILITY
$$$tcpm_connection_state_machine: state_change = 0, state = 0xa.
timer_cancel_no_response
PDO[0] = 0x0801912c
Remote SRC_CAPS externally powered bit is set.
PDO-1 Fixed, 5000 - 5000 mV, 3000 mA, 15000 mW
PDO[1] = 0x0003c12c
PDO-2 Fixed, 12000 - 12000 mV, 3000 mA, 36000 mW
PDO[2] = 0x0004b0fa
PDO-3 Fixed, 15000 - 15000 mV, 2500 mA, 37500 mW
PDO-3 0x0004b0fa selected
selected_snk_pdo_idx: 2
PE_SNK_SELECT_CAPABILITY
Tx msg_type: 2 (REQUEST), sop: 0, ndo: 1
buf[0-2]: 0x06 42 10
->P0 IRQ: 0x012a
Lo-Voltage alarm
Hard Reset Rx'd.
PE_SNK_TRANSITION_TO_DEFAULT
*****TCPC_ALERT_POWER_STATUS****
pwr_status = 0x08
VBUS not present
UNATTACHED_SNK
$$$tcpm_connection_state_machine: state_change = 1, state = 0x1.
SRC VBUS off.
tcpm_source_vbus_disable()SNK VBUS off.
tcpm_hal_vbus_disable(port, VBUS_SNK);
tcpm_set_voltage_alarm_hi: 25575mV
tcpm_set_voltage_alarm_lo: 800mV
tcpm_set_sink_disconnect_threshold: 0mV
PE_UNATTACHED
tcpm_mux_controlMux: Disable
pe_dummy_state_entry
->P0 IRQ: 0x0101
Lo-Voltage alarm
CC status = 0x30
$$$tcpm_connection_state_machine: state_change = 0, state = 0x1.
->P0 IRQ: 0x0001
CC status = 0x13
ATTACH_WAIT_SNK
$$$tcpm_connection_state_machine: state_change = 1, state = 0x3.
timeout_cc_debounce CC status = 0x13
$$$tcpm_connection_state_machine: state_change = 0, state = 0x3.
->P0 IRQ: 0x0002
*****TCPC_ALERT_POWER_STATUS****
pwr_status = 0x08
VBUS not present
$$$tcpm_connection_state_machine: state_change = 0, state = 0x3.
->P0 IRQ: 0x0001
CC status = 0x13
$$$tcpm_connection_state_machine: state_change = 0, state = 0x3.
->P0 IRQ: 0x0001
CC status = 0x10
$$$tcpm_connection_state_machine: state_change = 0, state = 0x3.
->P0 IRQ: 0x8000
422IRQ = 0x10
LFO timer expired!
timeout_pd_debounce CC status = 0x10
UNATTACHED_SRC
$$$tcpm_connection_state_machine: state_change = 1, state = 0x0.
SRC VBUS off.
tcpm_source_vbus_disable()SNK VBUS off.
tcpm_hal_vbus_disable(port, VBUS_SNK);
tcpm_set_voltage_alarm_hi: 25575mV
tcpm_set_voltage_alarm_lo: 800mV
tcpm_set_sink_disconnect_threshold: 0mV
PE_UNATTACHED
tcpm_mux_controlMux: Disable
pe_dummy_state_entry
->P0 IRQ: 0x0100
Lo-Voltage alarm
$$$tcpm_connection_state_machine: state_change = 0, state = 0x0.

over 7 years ago

0 Jorge Llamas (SWAT) over 7 years ago

TI__Expert 7395 points

Hello Devan,

Thanks for your interest in our products.
We have assigned a support engineer and you should be getting a response soon.

Regards,
Jorge

0 Brian Quach over 7 years ago in reply to Jorge Llamas (SWAT)

TI__Expert 4325 points

Hi Devan,

From the log it appears that the after the sink requests the higher power, the source is not honoring the request and sends a hard reset to the sink. The source is supposed to reply with Accept msg to the request, increase the voltage and then send PS Ready msg. I would say this is an issue with the source but hard to say for certain without a PD analyzer trace. Your PD SW version 0.98 is a bit dated. I would suggest downloading the latest and retrying.

Regards,
Brian

0 Devan Lippman over 7 years ago in reply to Brian Quach

Prodigy 130 points

Hi Brian,

Still waiting on my approval for access to SW stack. The trace shows that the sink (TUSB422) never sends anything after the GoodCRC. About 28 ms later there is a Hard Reset on the bus.

Thanks,
Devan

0 Brian Quach over 7 years ago in reply to Devan Lippman

TI__Expert 4325 points

Hi Devan,
I'll check about your access. What msg is 422 sending the GoodCRC for? Last thing I saw in the log was the 422 sending a REQUEST msg so the source should have returned the GoodCRC.
Regards,
Brian

0 Devan Lippman over 7 years ago in reply to Brian Quach

Prodigy 130 points

The GoodCRC is response to the Source_Cap. I see REQUEST in the console log, but its never on the analyzer.

m:s.ms.us	Dur	Len	Err	CC	Role	Message	Data
-0:00.000.834	913.000 us	18 B		1	Source:DFP	[0]Source_Cap	61 31 2C 91 01 08 2C C1 03 00 FA B0 04 00 A6 0E F0 41
0:00.000.000	505.000 us	6 B		1	Sink:UFP	[0]GoodCRC	41 00 BB 6C BB A8
0:00.028.567	283.000 us	0 B		1		Hard Reset
0:00.220.770				2		PD
0:00.244.664				2		PD

0 Brian Quach over 7 years ago in reply to Brian Quach

TI__Expert 4325 points

Devan, I was told you have had SW access since May 30, 2017 and it will expire May 30, 2018.

0 Devan Lippman over 7 years ago in reply to Brian Quach

Prodigy 130 points

Hi Brian,

Can you please confirm that version 0.99 is the current version of the SW which I should be using? The PDlib appears to show no deltas from the image that I am using.

Thanks,
Devan

0 Brian Quach over 7 years ago in reply to Devan Lippman

TI__Expert 4325 points

Hi Devan,

Yes, that's the latest on the site. But I plan to make a update later this week. You should get a notification when it gets uploaded.

Regards,

Brian

0 Brian Quach over 7 years ago in reply to Brian Quach

TI__Expert 4325 points

Hi Devan,
If it still doesn't work, try disabling all debug output. If you are using a UART for debug, it can slow the code down enough to where PD timings are violated.

0 Devan Lippman over 7 years ago in reply to Brian Quach

Prodigy 130 points

That did it, thanks!

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TUSB422: Sink profile negotiation