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DShot timing improvements #149

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DShot timing improvements #149

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51923fe
corrected dshot bidir timing for L431. Timer @40MHz --> 2.75e-6s*40MH…
NightHawk32 Dec 18, 2024
3e1a695
switched from MSI to HSI for L431, now having better timings and more…
NightHawk32 Dec 18, 2024
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2 changes: 1 addition & 1 deletion Mcu/l431/Src/IO.c
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Original file line number Diff line number Diff line change
Expand Up @@ -68,7 +68,7 @@ void sendDshotDma()
IC_TIMER_REGISTER->CCMR1 = 0x60;
IC_TIMER_REGISTER->CCER = 0x3;
IC_TIMER_REGISTER->PSC = output_timer_prescaler;
IC_TIMER_REGISTER->ARR = 115;
IC_TIMER_REGISTER->ARR = 110;

IC_TIMER_REGISTER->EGR |= TIM_EGR_UG;
#ifdef USE_TIMER_3_CHANNEL_1
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10 changes: 4 additions & 6 deletions Mcu/l431/Src/peripherals.c
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Original file line number Diff line number Diff line change
Expand Up @@ -71,17 +71,15 @@ void SystemClock_Config(void)
#endif

#else
LL_RCC_MSI_Enable();
LL_RCC_HSI_Enable();

/* Wait till MSI is ready */
while(LL_RCC_MSI_IsReady() != 1)
while(LL_RCC_HSI_IsReady() != 1)
{

}
LL_RCC_MSI_EnableRangeSelection();
LL_RCC_MSI_SetRange(LL_RCC_MSIRANGE_6);
LL_RCC_MSI_SetCalibTrimming(0);
LL_RCC_PLL_ConfigDomain_SYS(LL_RCC_PLLSOURCE_MSI, LL_RCC_PLLM_DIV_1, 40, LL_RCC_PLLR_DIV_2);
LL_RCC_HSI_SetCalibTrimming(16);
LL_RCC_PLL_ConfigDomain_SYS(LL_RCC_PLLSOURCE_HSI, LL_RCC_PLLM_DIV_1, 10, LL_RCC_PLLR_DIV_2);
#endif

LL_RCC_PLL_EnableDomain_SYS();
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