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74 lines
2.0 KiB
C
74 lines
2.0 KiB
C
/*
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* Copyright (C) 2016 Freie Universität Berlin
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @ingroup cpu_nrf5x_common
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* @ingroup drivers_periph_flashpage
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* @{
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*
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* @file
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* @brief Low-level flash page driver implementation
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*
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* @author Hauke Petersen <hauke.petersen@fu-berlin.de>
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*
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* @}
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*/
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#include "cpu.h"
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#include "assert.h"
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#include "periph/flashpage.h"
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#ifndef NRF_NVMC
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#define NRF_NVMC NRF_NVMC_S
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#endif
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void flashpage_erase(unsigned page)
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{
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assert(page < (int)FLASHPAGE_NUMOF);
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uint32_t *page_addr = (uint32_t *)flashpage_addr(page);
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/* erase given page */
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NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Een;
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#ifndef NRF_NVMC_S
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NRF_NVMC->ERASEPAGE = (uint32_t)page_addr;
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#else
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/* NRF_NVMC->ERASEPAGE doesn't exist on nRF9160 family, the proper
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way to erase a page is to write 0xFFFFFFFF in the first 32-bit
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word of the page to erase it (see Chap 4.4.2 from nRF9160 datasheet ) */
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*page_addr = UINT32_MAX;
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#endif
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while (NRF_NVMC->READY == 0) {}
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}
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void flashpage_write(void *target_addr, const void *data, size_t len)
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{
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/* assert multiples of FLASHPAGE_WRITE_BLOCK_SIZE are written and no less of
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that length. */
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assert(!(len % FLASHPAGE_WRITE_BLOCK_SIZE));
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/* ensure writes are aligned */
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assert(!(((unsigned)target_addr % FLASHPAGE_WRITE_BLOCK_ALIGNMENT) ||
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((unsigned)data % FLASHPAGE_WRITE_BLOCK_ALIGNMENT)));
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/* ensure the length doesn't exceed the actual flash size */
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assert(((unsigned)target_addr + len) <
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(CPU_FLASH_BASE + (FLASHPAGE_SIZE * FLASHPAGE_NUMOF)) + 1);
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uint32_t *page_addr = target_addr;
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const uint32_t *data_addr = data;
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NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Wen;
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for (unsigned i = 0; i < (len / FLASHPAGE_WRITE_BLOCK_SIZE); i++) {
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*page_addr++ = data_addr[i];
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}
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/* finish up */
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NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Ren;
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}
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