TUSB422: UFP mode is stuck during initialization phase

Here there is our UFP configuration:

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#define PORT0 0
#define PDO1 0
#define PDO2 1

#define USB_VID 0x0451
#define USB_PID 0x0422
#define USB_BCD_DEVICE 0x0 /* device-defined revision number */

const tcpc_config_t typec_config[NUM_TCPC_DEVICES] =
{
[PORT0].intf = SMBUS_MASTER0,
[PORT0].slave_addr = TUSB422_SLAVE_ADDR_NC,
[PORT0].flags = TC_FLAGS_TRY_SNK,
[PORT0].role = ROLE_SNK,
[PORT0].rp_val = RP_HIGH_CURRENT,
};

const usb_pd_port_config_t pd_config[NUM_TCPC_DEVICES] =
{
[PORT0].usb_comm_capable = true,
[PORT0].usb_suspend_supported = false,
[PORT0].externally_powered = false,
[PORT0].dual_role_data = false,
[PORT0].unchunked_msg_support = false, /* Always false for TUSB422 */

[PORT0].num_src_pdos = 0,
[PORT0].num_snk_pdos = 1,
/* vSafe5V Sink PDO */
[PORT0].snk_caps[PDO1].SupplyType = SUPPLY_TYPE_FIXED,
[PORT0].snk_caps[PDO1].MinV = PDO_VOLT(5000),
[PORT0].snk_caps[PDO1].MaxV = 0, /* N/A */
[PORT0].snk_caps[PDO1].MaxOperatingCurrent = PDO_CURR(3000),
[PORT0].snk_caps[PDO1].MinOperatingCurrent = PDO_CURR(100),
[PORT0].snk_caps[PDO1].OperationalCurrent = PDO_CURR(3000),
[PORT0].snk_caps[PDO1].MaxOperatingPower = 0, /* N/A */
[PORT0].snk_caps[PDO1].MinOperatingPower = 0, /* N/A */
[PORT0].snk_caps[PDO1].OperationalPower = 0, /* N/A */

[PORT0].higher_capability = false,
[PORT0].giveback_flag = false,
[PORT0].no_usb_suspend = true,
[PORT0].fast_role_swap_support = FR_SWAP_NOT_SUPPORTED,
[PORT0].pdo_priority = PRIORITY_VOLTAGE,

[PORT0].auto_accept_swap_to_dfp = false,
[PORT0].auto_accept_swap_to_ufp = false,
[PORT0].auto_accept_swap_to_source = false,
[PORT0].auto_accept_swap_to_sink = false,
[PORT0].auto_accept_vconn_swap = false,

[PORT0].multi_function_preferred = true,
[PORT0].ufp_alt_mode_entry_timeout_enable = true,
[PORT0].id_header_vdo = (0x6C000000 + USB_VID),
[PORT0].cert_stat_vdo = 0,
[PORT0].product_vdo = ((uint32_t)USB_PID << 16) | USB_BCD_DEVICE,

[PORT0].num_product_type_vdos = 1,
[PORT0].product_type_vdos[0] = 0xB100001B,
[PORT0].product_type_vdos[1] = 0,
[PORT0].product_type_vdos[2] = 0,
[PORT0].num_svids = 1,
[PORT0].svids[0] = 0xFF01,
[PORT0].svids[1] = 0,
[PORT0].svids[2] = 0,
[PORT0].modes[0] = 0x080845,
[PORT0].modes[1] = 0,
[PORT0].modes[2] = 0,
};
------------

Can you spot any mistake in this configuration?

will assign to right person

Very good, waiting for your feedback.


In the mean time let me give you more details:

- our i2c interface runs with 1 MHz clock (i2c interface works fine and we can see data on the CC lines)

- we are using TUSB422 as UFP

- we are planning to enable Alternate Mode

- we would like to get Display Port and usb3 available after the Power Delivery protocol exchange

- we are planning to use a microcontroller without external power, Vbus coming from the usb-c is the main one. [if we send the hard_reset message it doesn't work because the power low]

Hope it will help to understand our scenario.


Can you help us to sort out this problem?

Morning,

Thanks for coming back to me.

Do you guys have any news about that?

I you require more details, please let me know.

vbusin = 5V
cc1 is in the range of 0 to 200 mV
cc2 is in the range of 1.6 to 1.8V

200mV seems high for unused CC pin. It should always be near GND. If you flip the orientation of USB-C cable, does voltage on CC1 and CC2 swap?

yes, they swap

while experimenting,
we have edited the TI library and we have changed from HARD_RESET to SOFT_RESET command (after PE_SNK_WAIT_FOR_CAPS timeout).
But it did not change much.

Any suggestion?

Hi,

does the microcontroller software work using UFP Alternate Mode?

Hi,

Is this the reference design you are using?  

USB-C™ to DisplayPort Active Cable Reference Design

If not, could you please tell me what reference design you are using?  This will help me determine what MCU code is appropriate for your application.

Also, could you send me your current MCU code in a zip file?

Thanks,