mirror of https://github.com/wolfSSL/wolfBoot.git
145 lines
3.5 KiB
C
145 lines
3.5 KiB
C
/* nrf52.c
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*
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* Copyright (C) 2026 wolfSSL Inc.
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*
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* This file is part of wolfBoot.
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*
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* wolfBoot is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* wolfBoot is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
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*/
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#ifdef TARGET_nrf52
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#include <stdint.h>
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#include "image.h"
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#include "nrf52.h"
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#ifdef DEBUG_UART
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#define UARTE_ENABLE_ENABLE 8u
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void uart_init(void)
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{
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UART0_BAUDRATE = BAUD_115200;
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UART0_ENABLE = UARTE_ENABLE_ENABLE;
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}
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static volatile uint8_t uart_tx_buf;
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static void uart_write_char(char c)
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{
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uart_tx_buf = c;
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UART0_EVENT_ENDTX = 0;
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UART0_TXD_PTR = (uint32_t)&uart_tx_buf;
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UART0_TXD_MAXCOUNT = 1;
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UART0_TASK_STARTTX = 1;
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while(UART0_EVENT_ENDTX == 0)
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;
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}
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void uart_write(const char* buf, unsigned int sz)
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{
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uint32_t pos = 0;
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while (sz-- > 0) {
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char c = buf[pos++];
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if (c == '\n') { /* handle CRLF */
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uart_write_char('\r');
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}
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uart_write_char(c);
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}
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}
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#endif /* DEBUG_UART */
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static void RAMFUNCTION flash_wait_complete(void)
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{
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while (NVMC_READY == 0)
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;
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}
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int RAMFUNCTION hal_flash_write(uint32_t address, const uint8_t *data, int len)
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{
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int i = 0;
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uint32_t *src, *dst;
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while (i < len) {
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if ((len - i > 3) && ((((address + i) & 0x03) == 0) && ((((uint32_t)data) + i) & 0x03) == 0)) {
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/* Index by "i" directly: the condition above only guarantees
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* that "address + i" and "data + i" are word aligned, so
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* dst[i >> 2] off the unaligned base would address the wrong
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* word (and fault on a strict-alignment core). */
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src = (uint32_t *)(data + i);
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dst = (uint32_t *)(address + i);
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NVMC_CONFIG = NVMC_CONFIG_WEN;
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flash_wait_complete();
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*dst = *src;
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flash_wait_complete();
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i+=4;
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} else {
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uint32_t val;
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uint8_t *vbytes = (uint8_t *)(&val);
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uint32_t off = ((address + i) % 4);
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dst = (uint32_t *)(address + i - off);
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val = *dst;
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while (off < 4) {
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if (i < len)
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vbytes[off++] = data[i++];
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else
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off++;
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}
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NVMC_CONFIG = NVMC_CONFIG_WEN;
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flash_wait_complete();
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*dst = val;
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flash_wait_complete();
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}
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}
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return 0;
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}
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void RAMFUNCTION hal_flash_unlock(void)
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{
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}
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void RAMFUNCTION hal_flash_lock(void)
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{
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}
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int RAMFUNCTION hal_flash_erase(uint32_t address, int len)
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{
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uint32_t end = address + len - 1;
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uint32_t p;
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for (p = address; p <= end; p += FLASH_PAGE_SIZE) {
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NVMC_CONFIG = NVMC_CONFIG_EEN;
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flash_wait_complete();
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NVMC_ERASEPAGE = p;
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flash_wait_complete();
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}
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return 0;
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}
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void hal_init(void)
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{
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TASKS_HFCLKSTART = 1;
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while(TASKS_HFCLKSTARTED == 0)
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;
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}
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void hal_prepare_boot(void)
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{
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#ifdef WOLFBOOT_RESTORE_CLOCK
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TASKS_HFCLKSTOP = 1;
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#endif
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}
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#endif /* TARGET_nrf52 */
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