From 3061ecca3d0fdfb87dabbf5f63c9e06c2a30f53a Mon Sep 17 00:00:00 2001 From: Trygve Laugstøl Date: Thu, 23 Aug 2018 17:08:59 +0200 Subject: o Initial import. --- .../modules/nrfx/mdk/system_nrf51.c | 143 +++++++++++++++++++++ 1 file changed, 143 insertions(+) create mode 100644 thirdparty/nRF5_SDK_15.0.0_a53641a/modules/nrfx/mdk/system_nrf51.c (limited to 'thirdparty/nRF5_SDK_15.0.0_a53641a/modules/nrfx/mdk/system_nrf51.c') diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/modules/nrfx/mdk/system_nrf51.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/modules/nrfx/mdk/system_nrf51.c new file mode 100644 index 0000000..e342441 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/modules/nrfx/mdk/system_nrf51.c @@ -0,0 +1,143 @@ +/* + +Copyright (c) 2009-2018 ARM Limited. All rights reserved. + + SPDX-License-Identifier: Apache-2.0 + +Licensed 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 + + 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. + +NOTICE: This file has been modified by Nordic Semiconductor ASA. + +*/ + +/* NOTE: Template files (including this one) are application specific and therefore expected to + be copied into the application project folder prior to its use! */ + +#include +#include +#include "nrf.h" +#include "system_nrf51.h" + +/*lint ++flb "Enter library region" */ + + +#define __SYSTEM_CLOCK (16000000UL) /*!< nRF51 devices use a fixed System Clock Frequency of 16MHz */ + +static bool is_manual_peripheral_setup_needed(void); +static bool is_disabled_in_debug_needed(void); +static bool is_peripheral_domain_setup_needed(void); + + +#if defined ( __CC_ARM ) + uint32_t SystemCoreClock __attribute__((used)) = __SYSTEM_CLOCK; +#elif defined ( __ICCARM__ ) + __root uint32_t SystemCoreClock = __SYSTEM_CLOCK; +#elif defined ( __GNUC__ ) + uint32_t SystemCoreClock __attribute__((used)) = __SYSTEM_CLOCK; +#endif + +void SystemCoreClockUpdate(void) +{ + SystemCoreClock = __SYSTEM_CLOCK; +} + +void SystemInit(void) +{ + /* If desired, switch off the unused RAM to lower consumption by the use of RAMON register. + It can also be done in the application main() function. */ + + /* Prepare the peripherals for use as indicated by the PAN 26 "System: Manual setup is required + to enable the use of peripherals" found at Product Anomaly document for your device found at + https://www.nordicsemi.com/. The side effect of executing these instructions in the devices + that do not need it is that the new peripherals in the second generation devices (LPCOMP for + example) will not be available. */ + if (is_manual_peripheral_setup_needed()) + { + *(uint32_t volatile *)0x40000504 = 0xC007FFDF; + *(uint32_t volatile *)0x40006C18 = 0x00008000; + } + + /* Disable PROTENSET registers under debug, as indicated by PAN 59 "MPU: Reset value of DISABLEINDEBUG + register is incorrect" found at Product Anomaly document for your device found at + https://www.nordicsemi.com/. There is no side effect of using these instruction if not needed. */ + if (is_disabled_in_debug_needed()) + { + NRF_MPU->DISABLEINDEBUG = MPU_DISABLEINDEBUG_DISABLEINDEBUG_Disabled << MPU_DISABLEINDEBUG_DISABLEINDEBUG_Pos; + } + + /* Execute the following code to eliminate excessive current in sleep mode with RAM retention in nRF51802 devices, + as indicated by PAN 76 "System: Excessive current in sleep mode with retention" found at Product Anomaly document + for your device found at https://www.nordicsemi.com/. */ + if (is_peripheral_domain_setup_needed()){ + if (*(uint32_t volatile *)0x4006EC00 != 1){ + *(uint32_t volatile *)0x4006EC00 = 0x9375; + while (*(uint32_t volatile *)0x4006EC00 != 1){ + } + } + *(uint32_t volatile *)0x4006EC14 = 0xC0; + } +} + + +static bool is_manual_peripheral_setup_needed(void) +{ + if ((((*(uint32_t *)0xF0000FE0) & 0x000000FF) == 0x1) && (((*(uint32_t *)0xF0000FE4) & 0x0000000F) == 0x0)) + { + if ((((*(uint32_t *)0xF0000FE8) & 0x000000F0) == 0x00) && (((*(uint32_t *)0xF0000FEC) & 0x000000F0) == 0x0)) + { + return true; + } + if ((((*(uint32_t *)0xF0000FE8) & 0x000000F0) == 0x10) && (((*(uint32_t *)0xF0000FEC) & 0x000000F0) == 0x0)) + { + return true; + } + if ((((*(uint32_t *)0xF0000FE8) & 0x000000F0) == 0x30) && (((*(uint32_t *)0xF0000FEC) & 0x000000F0) == 0x0)) + { + return true; + } + } + + return false; +} + +static bool is_disabled_in_debug_needed(void) +{ + if ((((*(uint32_t *)0xF0000FE0) & 0x000000FF) == 0x1) && (((*(uint32_t *)0xF0000FE4) & 0x0000000F) == 0x0)) + { + if ((((*(uint32_t *)0xF0000FE8) & 0x000000F0) == 0x40) && (((*(uint32_t *)0xF0000FEC) & 0x000000F0) == 0x0)) + { + return true; + } + } + + return false; +} + +static bool is_peripheral_domain_setup_needed(void) +{ + if ((((*(uint32_t *)0xF0000FE0) & 0x000000FF) == 0x1) && (((*(uint32_t *)0xF0000FE4) & 0x0000000F) == 0x0)) + { + if ((((*(uint32_t *)0xF0000FE8) & 0x000000F0) == 0xA0) && (((*(uint32_t *)0xF0000FEC) & 0x000000F0) == 0x0)) + { + return true; + } + if ((((*(uint32_t *)0xF0000FE8) & 0x000000F0) == 0xD0) && (((*(uint32_t *)0xF0000FEC) & 0x000000F0) == 0x0)) + { + return true; + } + } + + return false; +} + +/*lint --flb "Leave library region" */ -- cgit v1.2.3