Known Issues

Table of Contents

• Flashing Failure
• For Jetson TX2
• SC7 Incompatibility
• CAN bus error causes flash process to hang

This section describes outstanding issues with the samples.

Flashing Failure

When the SPE binary size is greater than 128-kilobytes, flashing fails. The binary size includes the binary and NVIDIA-specific headers. To workaround this issue follow below steps.

For Jetson TX2

Open file flash_l4t_t186.xml, this file can be found under Linux_for_Tegra directory
Look for SPENAME and SPENAME_b partitions and change their size subsections from 131072 to 262144

SC7 Incompatibility

The SPE binary generated with this SDK is not compatible with NVIDIA^® SC7.

CAN bus error causes flash process to hang

When the CAN transceivers are not connected the CAN transmit part of the driver emits continuous debug prints. This causes a debug UART port ownership issue and a race condition between SPE and BLs, breaking the flashing process.

One way to solve such a problem is to rate-limit or disable the debug messages from tegra-can.c. Specifically, rate-limit or disable the messages from tegra_can_irq_handler() and tegra_add_msg_ctlr_list().

tegra_can_irq_handler() has many if conditions which test various interrupt status bits, but when the CAN transceivers are not connected the function mainly prints debug messages from the if((ir & MIT_IR_PED_MASK) || (ir & MIT_IR_PEA_MASK)) block. Rate-limiting such debug messages with a simple counter, or commenting them out, generally solves the issue.