unleashed-firmware/firmware/targets/f7/furi_hal/furi_hal_idle_timer.h
Georgii Surkov 01434265f6
[FL-2399, FL-2261] Tickless sleep shenanigans ()
* Disable USART in sleep
* Restore UART state on suspend/resume
* FuriHal: Enable stop mode and add insomnia to I2C and SPI
* Remove IDLE interrupt
* FuriHal: add FPU isr and disable all FPU interrupt, add core2 stop mode configuration on deep sleep
* FuriHal: tie stop mode debug with debug rtc flag
* FuriHal: adjust flash latency on clock switch, tie mcu debug with RTC debug flag
* FuriHal: move resource init to early stage
* Add EXTI pending check, enable debug traps with compile-time flag
* Wrap sleep debug functions in conditional compilation
* Remove erroneous changed
* Do not use CSS, remove it from everywhere
* Enable/disable USB on VBUS connect (prototype)
* FuriHal: add LPMS and DEEPSLEEP magic, workaround state inconsistency between cores
* FuriHal: honor c1 LMPS
* USB mode switch fix
* Applications: add flags and insomnia bypass system
* Correct spelling
* FuriHal: cleanup insomnia usage, reset sleep flags on wakeup, add shutdown api
* FuriHal: extra check on reinit request
* FuriHal: rename gpio_display_rst pin to gpio_display_rst_n
* FuriHal: add debug HAL
* FuriHal: add some magic to core2 reload procedure, fix issue with crash on ble keyboard exit
* FuriHal: cleanup ble glue, add BLE_GLUE_DEBUG flag
* FuriHal: ble reinit API, move os timer to LPTIM1 for deep sleep capability, shutdown that works
* FuriHal: take insomnia while shutdown
* Remove USB switch on/off on VBUS change
* Better tick skew handling
* Improve tick consistency under load
* Add USB_HP dummy IRQ handler
* Move interrupt check closer to sleep
* Clean up includes
* Re-enable Insomnia globally
* FuriHal: enable CSS
* FuriHal: remove questionable core2 clock shenanigans
* FuriHal: use core1 RCC registers in idle timer config
* FuriHal: return back CSS handlers, add lptim isr dispatching

Co-authored-by: Aleksandr Kutuzov <alleteam@gmail.com>
Co-authored-by: nminaylov <nm29719@gmail.com>
2022-04-29 16:29:51 +03:00

58 lines
1.9 KiB
C

#pragma once
#include <stm32wbxx_ll_lptim.h>
#include <stm32wbxx_ll_bus.h>
#include <stm32wbxx_ll_rcc.h>
#include <stdint.h>
// Timer used for tickless idle
#define FURI_HAL_IDLE_TIMER_MAX 0xFFFF
#define FURI_HAL_IDLE_TIMER LPTIM1
#define FURI_HAL_IDLE_TIMER_IRQ LPTIM1_IRQn
static inline void furi_hal_idle_timer_init() {
// Configure clock source
LL_RCC_SetLPTIMClockSource(LL_RCC_LPTIM1_CLKSOURCE_LSE);
// There is a theoretical possibility that we need it
LL_APB1_GRP1_EnableClockSleep(LL_APB1_GRP1_PERIPH_LPTIM1);
// Set interrupt priority and enable them
NVIC_SetPriority(
FURI_HAL_IDLE_TIMER_IRQ, NVIC_EncodePriority(NVIC_GetPriorityGrouping(), 15, 0));
NVIC_EnableIRQ(FURI_HAL_IDLE_TIMER_IRQ);
}
static inline void furi_hal_idle_timer_start(uint32_t count) {
count--;
// Enable timer
LL_LPTIM_Enable(FURI_HAL_IDLE_TIMER);
while(!LL_LPTIM_IsEnabled(FURI_HAL_IDLE_TIMER))
;
// Enable compare match interrupt
LL_LPTIM_EnableIT_CMPM(FURI_HAL_IDLE_TIMER);
// Set compare, autoreload and start counter
// Include some marging to workaround ARRM behaviour
LL_LPTIM_SetCompare(FURI_HAL_IDLE_TIMER, count - 3);
LL_LPTIM_SetAutoReload(FURI_HAL_IDLE_TIMER, count);
LL_LPTIM_StartCounter(FURI_HAL_IDLE_TIMER, LL_LPTIM_OPERATING_MODE_ONESHOT);
}
static inline void furi_hal_idle_timer_reset() {
// Hard reset timer
// THE ONLY RELIABLE WAY to stop it according to errata
LL_LPTIM_DeInit(FURI_HAL_IDLE_TIMER);
// Prevent IRQ handler call
NVIC_ClearPendingIRQ(FURI_HAL_IDLE_TIMER_IRQ);
}
static inline uint32_t furi_hal_idle_timer_get_cnt() {
uint32_t counter = LL_LPTIM_GetCounter(FURI_HAL_IDLE_TIMER);
uint32_t counter_shadow = LL_LPTIM_GetCounter(FURI_HAL_IDLE_TIMER);
while(counter != counter_shadow) {
counter = counter_shadow;
counter_shadow = LL_LPTIM_GetCounter(FURI_HAL_IDLE_TIMER);
}
return counter;
}