Frank
5 years ago
1 changed files with 1 additions and 1 deletions
+ 1
- 1
teensy4/startup.c
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| SYST_RVR = (SYSTICK_EXT_FREQ / 1000) - 1; | SYST_RVR = (SYSTICK_EXT_FREQ / 1000) - 1; | ||||
| SYST_CVR = 0; | SYST_CVR = 0; | ||||
| SYST_CSR = SYST_CSR_TICKINT | SYST_CSR_ENABLE; | SYST_CSR = SYST_CSR_TICKINT | SYST_CSR_ENABLE; | ||||
| SCB_SHPR3 = 0x20000000; // Systick = priority 32 | |||||
| SCB_SHPR3 = 0x20200000; // Systick, pendablesrvreq_isr = priority 32; | |||||
| ARM_DEMCR |= ARM_DEMCR_TRCENA; | ARM_DEMCR |= ARM_DEMCR_TRCENA; | ||||
| ARM_DWT_CTRL |= ARM_DWT_CTRL_CYCCNTENA; // turn on cycle counter | ARM_DWT_CTRL |= ARM_DWT_CTRL_CYCCNTENA; // turn on cycle counter | ||||
| systick_cycle_count = ARM_DWT_CYCCNT; // compiled 0, corrected w/1st systick | systick_cycle_count = ARM_DWT_CYCCNT; // compiled 0, corrected w/1st systick |
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