diff options
author | JF <jf@codingfield.com> | 2020-02-23 21:09:11 +0100 |
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committer | JF <jf@codingfield.com> | 2020-02-23 21:09:11 +0100 |
commit | 0aa1803ea22b119401bcd2e4d9d5278e8386f151 (patch) | |
tree | d7c6f7073430a2e3984b390ab0b4e12dc693be83 /src/drivers | |
parent | f07ffab4c1fa876e8da9a1bcc895ecf0dfa75acf (diff) |
Enable watchdog, and issue a WDT reset when the button is pushed for more than 7s.
Diffstat (limited to 'src/drivers')
-rw-r--r-- | src/drivers/Watchdog.cpp | 60 | ||||
-rw-r--r-- | src/drivers/Watchdog.h | 17 |
2 files changed, 77 insertions, 0 deletions
diff --git a/src/drivers/Watchdog.cpp b/src/drivers/Watchdog.cpp new file mode 100644 index 00000000..b0dc12e5 --- /dev/null +++ b/src/drivers/Watchdog.cpp @@ -0,0 +1,60 @@ +#include <mdk/nrf52.h> +#include <mdk/nrf52_bitfields.h> +#include <nrf_soc.h> +#include "Watchdog.h" +using namespace Pinetime::Drivers; + + +void Watchdog::Setup(uint8_t timeoutSeconds) { + NRF_WDT->CONFIG &= ~(WDT_CONFIG_SLEEP_Msk << WDT_CONFIG_SLEEP_Pos); + NRF_WDT->CONFIG |= (WDT_CONFIG_HALT_Run << WDT_CONFIG_SLEEP_Pos); + + NRF_WDT->CONFIG &= ~(WDT_CONFIG_HALT_Msk << WDT_CONFIG_HALT_Pos); + NRF_WDT->CONFIG |= (WDT_CONFIG_HALT_Pause << WDT_CONFIG_HALT_Pos); + + /* timeout (s) = (CRV + 1) / 32768 */ + // JF : 7500 = 7.5s + uint32_t crv = (((timeoutSeconds*1000u) << 15u) / 1000) - 1; + NRF_WDT->CRV = crv; + + /* Enable reload requests */ + NRF_WDT->RREN = (WDT_RREN_RR0_Enabled << WDT_RREN_RR0_Pos); +} + +void Watchdog::Start() { + NRF_WDT->TASKS_START = 1; +} + +void Watchdog::Kick() { + NRF_WDT->RR[0] = WDT_RR_RR_Reload; +} + +Watchdog::ResetReasons Watchdog::ResetReason() { + uint32_t resetReason; + sd_power_reset_reason_get(&resetReason); + sd_power_reset_reason_clr(0xFFFFFFFF); + if(resetReason & 0x01) return ResetReasons::ResetPin; + if((resetReason >> 1) & 0x01) return ResetReasons::Watchdog; + if((resetReason >> 2) & 0x01) return ResetReasons::SoftReset; + if((resetReason >> 3) & 0x01) return ResetReasons::CpuLockup; + if((resetReason >> 16) & 0x01) return ResetReasons::SystemOff; + if((resetReason >> 17) & 0x01) return ResetReasons::LpComp; + if((resetReason >> 18) & 0x01) return ResetReasons::DebugInterface; + if((resetReason >> 19) & 0x01) return ResetReasons::NFC; + return ResetReasons::HardReset; +} + +const char *Watchdog::ResetReasonToString(Watchdog::ResetReasons reason) { + switch(reason) { + case ResetReasons::ResetPin: return "Reset pin"; + case ResetReasons::Watchdog: return "Watchdog"; + case ResetReasons::DebugInterface: return "Debug interface"; + case ResetReasons::LpComp: return "LPCOMP"; + case ResetReasons::SystemOff: return "System OFF"; + case ResetReasons::CpuLockup: return "CPU Lock-up"; + case ResetReasons::SoftReset: return "Soft reset"; + case ResetReasons::NFC: return "NFC"; + case ResetReasons::HardReset: return "Hard reset"; + default: return "Unknown"; + } +} diff --git a/src/drivers/Watchdog.h b/src/drivers/Watchdog.h new file mode 100644 index 00000000..da192d9e --- /dev/null +++ b/src/drivers/Watchdog.h @@ -0,0 +1,17 @@ +#pragma once + +namespace Pinetime { + namespace Drivers { + class Watchdog { + public: + enum class ResetReasons { ResetPin, Watchdog, SoftReset, CpuLockup, SystemOff, LpComp, DebugInterface, NFC, HardReset }; + void Setup(uint8_t timeoutSeconds); + void Start(); + void Kick(); + + ResetReasons ResetReason(); + static const char* ResetReasonToString(ResetReasons reason); + + }; + } +} |