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-
- #include <stdint.h>
- #include <stdbool.h>
- #include "nrf.h"
- #include "nrf_erratas.h"
- #include "system_nrf52820.h"
- #define __SYSTEM_CLOCK_64M (64000000UL)
- #if defined ( __CC_ARM )
- uint32_t SystemCoreClock __attribute__((used)) = __SYSTEM_CLOCK_64M;
- #elif defined ( __ICCARM__ )
- __root uint32_t SystemCoreClock = __SYSTEM_CLOCK_64M;
- #elif defined ( __GNUC__ )
- uint32_t SystemCoreClock __attribute__((used)) = __SYSTEM_CLOCK_64M;
- #endif
- void SystemCoreClockUpdate(void)
- {
- SystemCoreClock = __SYSTEM_CLOCK_64M;
- }
- void SystemInit(void)
- {
-
- if (nrf52_errata_36()){
- NRF_CLOCK->EVENTS_DONE = 0;
- NRF_CLOCK->EVENTS_CTTO = 0;
- NRF_CLOCK->CTIV = 0;
- }
-
- if (nrf52_errata_66()){
- NRF_TEMP->A0 = NRF_FICR->TEMP.A0;
- NRF_TEMP->A1 = NRF_FICR->TEMP.A1;
- NRF_TEMP->A2 = NRF_FICR->TEMP.A2;
- NRF_TEMP->A3 = NRF_FICR->TEMP.A3;
- NRF_TEMP->A4 = NRF_FICR->TEMP.A4;
- NRF_TEMP->A5 = NRF_FICR->TEMP.A5;
- NRF_TEMP->B0 = NRF_FICR->TEMP.B0;
- NRF_TEMP->B1 = NRF_FICR->TEMP.B1;
- NRF_TEMP->B2 = NRF_FICR->TEMP.B2;
- NRF_TEMP->B3 = NRF_FICR->TEMP.B3;
- NRF_TEMP->B4 = NRF_FICR->TEMP.B4;
- NRF_TEMP->B5 = NRF_FICR->TEMP.B5;
- NRF_TEMP->T0 = NRF_FICR->TEMP.T0;
- NRF_TEMP->T1 = NRF_FICR->TEMP.T1;
- NRF_TEMP->T2 = NRF_FICR->TEMP.T2;
- NRF_TEMP->T3 = NRF_FICR->TEMP.T3;
- NRF_TEMP->T4 = NRF_FICR->TEMP.T4;
- }
-
-
- if (nrf52_errata_136()){
- if (NRF_POWER->RESETREAS & POWER_RESETREAS_RESETPIN_Msk){
- NRF_POWER->RESETREAS = ~POWER_RESETREAS_RESETPIN_Msk;
- }
- }
-
-
- #if (__FPU_USED == 1)
- SCB->CPACR |= (3UL << 20) | (3UL << 22);
- __DSB();
- __ISB();
- #endif
-
- #if defined (CONFIG_GPIO_AS_PINRESET)
- if (((NRF_UICR->PSELRESET[0] & UICR_PSELRESET_CONNECT_Msk) != (UICR_PSELRESET_CONNECT_Connected << UICR_PSELRESET_CONNECT_Pos)) ||
- ((NRF_UICR->PSELRESET[1] & UICR_PSELRESET_CONNECT_Msk) != (UICR_PSELRESET_CONNECT_Connected << UICR_PSELRESET_CONNECT_Pos))){
- NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Wen << NVMC_CONFIG_WEN_Pos;
- while (NRF_NVMC->READY == NVMC_READY_READY_Busy){}
- NRF_UICR->PSELRESET[0] = 18;
- while (NRF_NVMC->READY == NVMC_READY_READY_Busy){}
- NRF_UICR->PSELRESET[1] = 18;
- while (NRF_NVMC->READY == NVMC_READY_READY_Busy){}
- NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Ren << NVMC_CONFIG_WEN_Pos;
- while (NRF_NVMC->READY == NVMC_READY_READY_Busy){}
- NVIC_SystemReset();
- }
- #endif
- SystemCoreClockUpdate();
- }
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