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wolfTPM/IDE/Espressif
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David Garske 579ec8cc7f Bump copyright year to 2026 and version to 4.0.0 
Release prep for v4.0.0:
- Copyright headers updated 2025 -> 2026 across sources, headers, and examples
- Library version 3.10.0 -> 4.0.0 (libtool 16:8:0 -> 17:0:0)
- configure.ac WOLFSSL_URL http -> https
 		2026-04-22 09:24:55 -07:00
..
VisualGDB Initial Infineon I2C TPM support for Espressif ESP32 2024-05-10 14:16:39 -07:00
components Bump copyright year to 2026 and version to 4.0.0 2026-04-22 09:24:55 -07:00
main Bump copyright year to 2026 and version to 4.0.0 2026-04-22 09:24:55 -07:00
CMakeLists.txt Initial Infineon I2C TPM support for Espressif ESP32 2024-05-10 14:16:39 -07:00
README.md Initial Infineon I2C TPM support for Espressif ESP32 2024-05-10 14:16:39 -07:00
include.am Initial Infineon I2C TPM support for Espressif ESP32 2024-05-10 14:16:39 -07:00
partitions_singleapp_large.csv Initial Infineon I2C TPM support for Espressif ESP32 2024-05-10 14:16:39 -07:00
sdkconfig.defaults SPI Stack Adjustment 2025-12-03 09:28:28 -08:00

README.md

wolfTPM for Espressif

Initial minimum memory requirements: 35KB Stack. See sdkconfig.defaults.

Current memory assigned: 50960

Pin assignments

Note: The following pin assignments are used by default, you can change these in the menuconfig .

SDA SCL
ESP I2C Master I2C_MASTER_SDA I2C_MASTER_SCL
TPM2 Device SDA SCL

For the actual default value of I2C_MASTER_SDA and I2C_MASTER_SCL see Example Configuration in menuconfig.

Note: There's no need to add an external pull-up resistors for SDA/SCL pin, because the driver will enable the internal pull-up resistors.

Troubleshooting

If problems are encountered with the I2C module:

  • Beware that printing to the UART during an I2C transaction may affect timing and cause errors.
  • Ensure the TPM module has been reset after flash updated.
  • Check wiring. SCL to SCL, SDA to SDA. Probably best to ensure GND is connected. Vcc is 3.3v only.
  • Ensure the proper pins are connected on the ESP32. SCL default is GPIO 19; SDA default is GPIO 18.
  • Test with only a single I2C device before testing concurrent with other I2C boards.
  • When using multiple I2C boards, check for appropriate pullups. See data sheet.
  • Reset TPM device again. Press button on TPM SLB9673 eval board or set TPM pin 17 as appropriate.