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| // ESP32-S3 Microsecond Counters: 32/64-bit, read/write | |
| // 4 full 64bit usec counters (read/write) and one 32 bit freerunning counter | |
| // | |
| // Two ways to get a microsecond timestamp: | |
| // | |
| // 1. Very fast, but returns only the lower 32 bits | |
| // 2. Full 64-bit timestamp, slightly slower | |
| // | |
| // For simplicity, this example uses the Arduino framework. | |
| // |
vvb333007
/ gist:d3ef7e1fce628507ae2ceb92bd8aea0c
Created
May 19, 2026 03:18
32bit and 64bit microseconds counters on ESP32-S3. Undocumented.
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| // Example for ESP32-S3: two ways to read a microsecond timestamp. | |
| // | |
| // 1. Very fast, but returns only the lower 32 bits | |
| // 2. Full 64-bit timestamp, slightly slower | |
| // | |
| // For simplicity, this example uses the Arduino framework. | |
| // | |
| // vvb333007@gmail.com | |
| // | |
| // |
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| // Intercept DebugInterrupt and call a handler written in C (Xtensa, windowed ABI) | |
| // | |
| // Interrupt handlers for levels 4, 5, 6 and 7 must be written in assembly. | |
| // This is because the system does not invoke them like a regular C function. | |
| // This file contains an assembly adapter that calls regular C code. | |
| // | |
| #ifdef __XTENSA__ | |
| #include <xtensa/coreasm.h> |