USB EZ-PD™ Type-C

[Anderson_Lin]

Hi All

CYPD3120-40LQXI change to DRP , How to modify FW ?

Attach HEX file : CYPD3120-40LQXI_dp_dongle.hex

[YiZ_31 · Accepted solution]

Hi,

You'll need to manually override the config table in the firmware.

Please check the following example code to change its power role to DRP and add source PDO:

dpm_update_port_config(0, 2, 0, 1, 2);

pd_do_t SRC_PDO[1];

SRC_PDO[0].val = 0x0001912C; //5V 3A (This value can check on xml file created by EZ-PD Configuration Utility)

dpm_update_src_cap(0, 1, SRC_PDO);

dpm_update_src_cap_mask (0, 0x01);

And you need to provide the corresponding power to the VBUS since it is a power source. External code is needed to control the power device like buck boost.

Regards,
Eddie

[Anderson_Lin]

Hi Eddie

Thanks for your response.

dpm_update_port_config(0, 2, 0, 1, 2);

pd_do_t SRC_PDO[1];

dpm_update_src_cap(0, 1, SRC_PDO);

dpm_update_src_cap_mask (0, 0x01);

Please tell me which .C file to new add .

SRC_PDO[0].val = 0x0001912C; //5V 3A (This value can check on xml file created by EZ-PD Configuration Utility)

is completed;you can check "CYPD3120-40LQXI_dp_dongle.hex.zip"

[YiZ_31]

Hi,

You could add them to main function.