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authorGravatar Cliff L. Biffle <cliff@oxide.computer> 2020-05-24 17:19:57 -0700
committerGravatar Cliff L. Biffle <cliff@oxide.computer> 2020-05-24 17:19:57 -0700
commit97141b951b044bd4a06478454a179d633f28d148 (patch)
tree6283febb39959b153502e95f5dbba327875c52b9 /src/macros.rs
parentfc19f3e1588e7486716667dbd0db37c6dc41d0ed (diff)
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ITM: don't test reserved bits in is_fifo_ready
On ARMv7-M, bits 31:1 of the value read from STIMx are reserved, so comparing them against zero is a bad idea. On ARMv8-M, bit 1 has been repurposed to indicate DISABLED. This means that the is_fifo_ready impl hangs forever when ITM is disabled on a Cortex-M33 (for example). Changed to test only the FIFOREADY bit.
Diffstat (limited to 'src/macros.rs')
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