| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| #include <mcu/cortex_m4.h> |
| #include "hal/hal_nvreg.h" |
| #include "nrf.h" |
| |
| /* There are two GPREGRET registers on the NRF52 */ |
| #define HAL_NVREG_MAX (2) |
| |
| /* GPREGRET registers only save the 8 lsbits */ |
| #define HAL_NVREG_WIDTH_BYTES (1) |
| |
| static volatile uint32_t *regs[HAL_NVREG_MAX] = { |
| &NRF_POWER->GPREGRET, |
| &NRF_POWER->GPREGRET2 |
| }; |
| |
| void |
| hal_nvreg_write(unsigned int reg, uint32_t val) |
| { |
| if(reg < HAL_NVREG_MAX) { |
| *regs[reg] = val; |
| } |
| } |
| |
| uint32_t |
| hal_nvreg_read(unsigned int reg) |
| { |
| uint32_t val = 0; |
| |
| if(reg < HAL_NVREG_MAX) { |
| val = *regs[reg]; |
| } |
| |
| return val; |
| } |
| |
| unsigned int hal_nvreg_get_num_regs(void) |
| { |
| return HAL_NVREG_MAX; |
| } |
| |
| unsigned int hal_nvreg_get_reg_width(void) |
| { |
| return HAL_NVREG_WIDTH_BYTES; |
| } |
