OTP

[中文]

1 Functional Overview

• For theoretical background on OTP, see: OTP Driver

Note

• By default, OTP is enabled on the CP side, but not on the AP side. If users need to use OTP on AP, they must manually enable OTP configuration.

2 Code Paths

• Demo path:

  ap\components\bk_cli\cli_otp.c

• Driver source path:

  ap\middleware\driver\otp\otp_driver_v1_1.c

Note

• otp_driver_v1_1.c: OTP driver implementation

• cli_otp.c: OTP feature test command implementation

3 Key OTP Data Structures

typedef enum{
    OTP_READ_WRITE = 0,
    OTP_READ_ONLY,
    OTP_NO_ACCESS,
} otp_privilege_t;

typedef enum{
    OTP_BUSY = 0x1,
    OTP_ERROR = 0x2,
    OTP_WARNING = 0x4,
    OTP_WRONG = 0x8,
    OTP_FORBID = 0x10,
} otp_status_t;

Description: - OTP permissions include: Read/Write, Read-Only, No Access, corresponding to command parameters 0/1/2.

• OTP status information includes: Busy, Error, Warning, Wrong, Forbidden, corresponding to parameters 1/2/4/8/16.

4 CLI Command Overview

Demo macro configuration dependencies:

NAME	Description	File	Value
CONFIG_OTP_V1	Enable OTP	ap\middleware\soc\bk7236\bk7236.defconfig	n
CONFIG_OTP_TEST	Enable OTP test command	ap\middleware\soc\bk7236\bk7236.defconfig	n

Supported CLI Commands:

Command	Param	Description
otp_apb self_test	none	self-test of OTP function in ATE mode
otp_apb read_permission [item_id]	item_id: item id	Check the read permission in the OTP1 area
otp_apb write_permission [item_id][permission]	item_id: item id	Update the write permissions in the OTP1 section
	permission: RW/RO/NA
otp_apb read [item_id][size]	item_id: item id	Read the data content in the OTP1 area
	size: size of each item
otp_apb write [item_id][size][data]	item_id: item id	Update the data content in the OTP1 area
	size: size of each item
	data: need write data
otp_ahb self_test	none	self-test of OTP function in ATE mode
otp_ahb read_permission [item_id]	item_id: item id	Check the read permission in the OTP2 area
otp_ahb write_permission [item_id][permission]	item_id: item id	Update the write permissions in the OTP1 section
	permission: RW/RO/NA
otp_ahb read [item_id][size]	item_id: item id	Read the data content in the OTP1 area
	size: size of each item
otp_ahb write [item_id][size][data]	item_id: item id	Update the data content in the OTP1 area
	size: size of each item
	data: need write data