Defined Constants and Types for the STM32L4xx Independent Watchdog Timer More...
Modules | |
| IWDG Key Values | |
| IWDG prescaler divider | |
| IWDG Status Register Values | |
Macros | |
| #define | IWDG_KR MMIO32(IWDG_BASE + 0x00) |
| Key Register (IWDG_KR) More... | |
| #define | IWDG_PR MMIO32(IWDG_BASE + 0x04) |
| Prescaler register (IWDG_PR) More... | |
| #define | IWDG_RLR MMIO32(IWDG_BASE + 0x08) |
| Reload register (IWDG_RLR) More... | |
| #define | IWDG_SR MMIO32(IWDG_BASE + 0x0c) |
| Status register (IWDG_SR) More... | |
| #define | IWDG_PR_LSB 0 |
| #define | IWDG_WINR MMIO32(IWDG_BASE + 0x10) |
| Window Register (IWDG_WINR) More... | |
Functions | |
| void | iwdg_start (void) |
| IWDG Enable Watchdog Timer. More... | |
| void | iwdg_set_period_ms (uint32_t period) |
| IWDG Set Period in Milliseconds. More... | |
| bool | iwdg_reload_busy (void) |
| IWDG Get Reload Register Status. More... | |
| bool | iwdg_prescaler_busy (void) |
| IWDG Get Prescaler Register Status. More... | |
| void | iwdg_reset (void) |
| IWDG reset Watchdog Timer. More... | |
Detailed Description
Defined Constants and Types for the STM32L4xx Independent Watchdog Timer
- Version
- 1.0.0
- Date
- 18 December 2017
LGPL License Terms libopencm3 License
Macro Definition Documentation
◆ IWDG_KR
Key Register (IWDG_KR)
Definition at line 40 of file iwdg_common_all.h.
◆ IWDG_PR
Prescaler register (IWDG_PR)
Definition at line 43 of file iwdg_common_all.h.
◆ IWDG_PR_LSB
| #define IWDG_PR_LSB 0 |
Definition at line 70 of file iwdg_common_all.h.
◆ IWDG_RLR
Reload register (IWDG_RLR)
Definition at line 46 of file iwdg_common_all.h.
◆ IWDG_SR
Status register (IWDG_SR)
Definition at line 49 of file iwdg_common_all.h.
◆ IWDG_WINR
Window Register (IWDG_WINR)
Definition at line 48 of file iwdg_common_v2.h.
Function Documentation
◆ iwdg_prescaler_busy()
| bool iwdg_prescaler_busy | ( | void | ) |
IWDG Get Prescaler Register Status.
- Returns
- boolean: TRUE if the prescaler register is busy and unavailable for loading a new period value.
Definition at line 135 of file iwdg_common_all.c.
References IWDG_SR, and IWDG_SR_PVU.
Referenced by iwdg_set_period_ms().
◆ iwdg_reload_busy()
| bool iwdg_reload_busy | ( | void | ) |
IWDG Get Reload Register Status.
- Returns
- boolean: TRUE if the reload register is busy and unavailable for loading a new count value.
Definition at line 123 of file iwdg_common_all.c.
References IWDG_SR, and IWDG_SR_RVU.
Referenced by iwdg_set_period_ms().
◆ iwdg_reset()
| void iwdg_reset | ( | void | ) |
IWDG reset Watchdog Timer.
The watchdog timer is reset. The counter restarts from the value in the reload register.
Definition at line 147 of file iwdg_common_all.c.
References IWDG_KR, and IWDG_KR_RESET.
Referenced by iwdg_set_period_ms().
◆ iwdg_set_period_ms()
| void iwdg_set_period_ms | ( | uint32_t | period | ) |
IWDG Set Period in Milliseconds.
The countdown period is converted into count and prescale values. The maximum period is 32.76 seconds; values above this are truncated. Periods less than 1ms are not supported by this library.
A delay of up to 5 clock cycles of the LSI clock (about 156 microseconds) can occasionally occur if the prescale or preload registers are currently busy loading a previous value.
- Parameters
-
[in] period uint32_t Period in milliseconds (< 32760) from a watchdog reset until a system reset is issued.
Definition at line 73 of file iwdg_common_all.c.
References COUNT_LENGTH, COUNT_MASK, IWDG_KR, IWDG_KR_UNLOCK, IWDG_PR, iwdg_prescaler_busy(), iwdg_reload_busy(), iwdg_reset(), and IWDG_RLR.
◆ iwdg_start()
| void iwdg_start | ( | void | ) |
IWDG Enable Watchdog Timer.
The watchdog timer is started. The timeout period defaults to 512 milliseconds unless it has been previously defined.
Definition at line 54 of file iwdg_common_all.c.
References IWDG_KR, and IWDG_KR_START.
