kopia lustrzana https://github.com/micropython/micropython
62 wiersze
2.1 KiB
C
62 wiersze
2.1 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2019 Glenn Ruben Bakke
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <stdbool.h>
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#include "nrf.h"
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#include "nrf52840_bitfields.h"
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bool uicr_REGOUT0_erased() {
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if (NRF_UICR->REGOUT0 == 0xFFFFFFFFUL) {
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return true;
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}
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return false;
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}
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void board_modules_init0(void)
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{
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if (uicr_REGOUT0_erased()) {
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// Wait for pending NVMC operations to finish.
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while (NRF_NVMC->READY != NVMC_READY_READY_Ready);
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// Enable write mode in NVMC.
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NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Wen;
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while (NRF_NVMC->READY != NVMC_READY_READY_Ready);
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// Write 3v3 value to UICR->REGOUT0.
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NRF_UICR->REGOUT0 = (UICR_REGOUT0_VOUT_3V3 & UICR_REGOUT0_VOUT_Msk) << UICR_REGOUT0_VOUT_Pos;
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while (NRF_NVMC->READY != NVMC_READY_READY_Ready);
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// Enable read mode in NVMC.
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NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Ren;
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while (NRF_NVMC->READY != NVMC_READY_READY_Ready);
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// Reset to apply the update.
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NVIC_SystemReset();
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}
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}
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