Repository: incubator-mynewt-core Updated Branches: refs/heads/develop 60c1d227d -> f55051b2c
http://git-wip-us.apache.org/repos/asf/incubator-mynewt-core/blob/f55051b2/hw/mcu/nordic/nrf52xxx/src/system_nrf52.c ---------------------------------------------------------------------- diff --git a/hw/mcu/nordic/nrf52xxx/src/system_nrf52.c b/hw/mcu/nordic/nrf52xxx/src/system_nrf52.c new file mode 100644 index 0000000..ab24c21 --- /dev/null +++ b/hw/mcu/nordic/nrf52xxx/src/system_nrf52.c @@ -0,0 +1,311 @@ +/* Copyright (c) 2012 ARM LIMITED + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * * Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * + * * Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * * Neither the name of ARM nor the names of its contributors may be used to + * endorse or promote products derived from this software without specific + * prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER + * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#include <stdint.h> +#include <stdbool.h> +#include "bsp/cmsis_nvic.h" +#include "nrf.h" +#include "system_nrf52.h" + +/*lint ++flb "Enter library region" */ + +#define __SYSTEM_CLOCK_64M (64000000UL) + +static bool errata_16(void); +static bool errata_31(void); +static bool errata_32(void); +static bool errata_36(void); +static bool errata_37(void); +static bool errata_57(void); +static bool errata_66(void); +static bool errata_108(void); + + +#if defined ( __CC_ARM ) + uint32_t SystemCoreClock __attribute__((used)) = __SYSTEM_CLOCK_64M; +#elif defined ( __ICCARM__ ) + __root uint32_t SystemCoreClock = __SYSTEM_CLOCK_64M; +#elif defined ( __GNUC__ ) + uint32_t SystemCoreClock __attribute__((used)) = __SYSTEM_CLOCK_64M; +#endif + +void SystemCoreClockUpdate(void) +{ + SystemCoreClock = __SYSTEM_CLOCK_64M; +} + +void SystemInit(void) +{ + /* Workaround for Errata 16 "System: RAM may be corrupt on wakeup from CPU IDLE" found at the Errata document + for your device located at https://infocenter.nordicsemi.com/ */ + if (errata_16()){ + *(volatile uint32_t *)0x4007C074 = 3131961357ul; + } + + /* Workaround for Errata 31 "CLOCK: Calibration values are not correctly loaded from FICR at reset" found at the Errata document + for your device located at https://infocenter.nordicsemi.com/ */ + if (errata_31()){ + *(volatile uint32_t *)0x4000053C = ((*(volatile uint32_t *)0x10000244) & 0x0000E000) >> 13; + } + + /* Workaround for Errata 32 "DIF: Debug session automatically enables TracePort pins" found at the Errata document + for your device located at https://infocenter.nordicsemi.com/ */ + if (errata_32()){ + CoreDebug->DEMCR &= ~CoreDebug_DEMCR_TRCENA_Msk; + } + + /* Workaround for Errata 36 "CLOCK: Some registers are not reset when expected" found at the Errata document + for your device located at https://infocenter.nordicsemi.com/ */ + if (errata_36()){ + NRF_CLOCK->EVENTS_DONE = 0; + NRF_CLOCK->EVENTS_CTTO = 0; + NRF_CLOCK->CTIV = 0; + } + + /* Workaround for Errata 37 "RADIO: Encryption engine is slow by default" found at the Errata document + for your device located at https://infocenter.nordicsemi.com/ */ + if (errata_37()){ + *(volatile uint32_t *)0x400005A0 = 0x3; + } + + /* Workaround for Errata 57 "NFCT: NFC Modulation amplitude" found at the Errata document + for your device located at https://infocenter.nordicsemi.com/ */ + if (errata_57()){ + *(volatile uint32_t *)0x40005610 = 0x00000005; + *(volatile uint32_t *)0x40005688 = 0x00000001; + *(volatile uint32_t *)0x40005618 = 0x00000000; + *(volatile uint32_t *)0x40005614 = 0x0000003F; + } + + /* Workaround for Errata 66 "TEMP: Linearity specification not met with default settings" found at the Errata document + for your device located at https://infocenter.nordicsemi.com/ */ + if (errata_66()){ + NRF_TEMP->A0 = NRF_FICR->TEMP.A0; + NRF_TEMP->A1 = NRF_FICR->TEMP.A1; + NRF_TEMP->A2 = NRF_FICR->TEMP.A2; + NRF_TEMP->A3 = NRF_FICR->TEMP.A3; + NRF_TEMP->A4 = NRF_FICR->TEMP.A4; + NRF_TEMP->A5 = NRF_FICR->TEMP.A5; + NRF_TEMP->B0 = NRF_FICR->TEMP.B0; + NRF_TEMP->B1 = NRF_FICR->TEMP.B1; + NRF_TEMP->B2 = NRF_FICR->TEMP.B2; + NRF_TEMP->B3 = NRF_FICR->TEMP.B3; + NRF_TEMP->B4 = NRF_FICR->TEMP.B4; + NRF_TEMP->B5 = NRF_FICR->TEMP.B5; + NRF_TEMP->T0 = NRF_FICR->TEMP.T0; + NRF_TEMP->T1 = NRF_FICR->TEMP.T1; + NRF_TEMP->T2 = NRF_FICR->TEMP.T2; + NRF_TEMP->T3 = NRF_FICR->TEMP.T3; + NRF_TEMP->T4 = NRF_FICR->TEMP.T4; + } + + /* Workaround for Errata 108 "RAM: RAM content cannot be trusted upon waking up from System ON Idle or System OFF mode" found at the Errata document + for your device located at https://infocenter.nordicsemi.com/ */ + if (errata_108()){ + *(volatile uint32_t *)0x40000EE4 = *(volatile uint32_t *)0x10000258 & 0x0000004F; + } + + /* Enable the FPU if the compiler used floating point unit instructions. __FPU_USED is a MACRO defined by the + * compiler. Since the FPU consumes energy, remember to disable FPU use in the compiler if floating point unit + * operations are not used in your code. */ + #if (__FPU_USED == 1) + SCB->CPACR |= (3UL << 20) | (3UL << 22); + __DSB(); + __ISB(); + #endif + + /* Configure NFCT pins as GPIOs if NFCT is not to be used in your code. If CONFIG_NFCT_PINS_AS_GPIOS is not defined, + two GPIOs (see Product Specification to see which ones) will be reserved for NFC and will not be available as + normal GPIOs. */ + #if defined (CONFIG_NFCT_PINS_AS_GPIOS) + if ((NRF_UICR->NFCPINS & UICR_NFCPINS_PROTECT_Msk) == (UICR_NFCPINS_PROTECT_NFC << UICR_NFCPINS_PROTECT_Pos)){ + NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Wen << NVMC_CONFIG_WEN_Pos; + while (NRF_NVMC->READY == NVMC_READY_READY_Busy){} + NRF_UICR->NFCPINS &= ~UICR_NFCPINS_PROTECT_Msk; + while (NRF_NVMC->READY == NVMC_READY_READY_Busy){} + NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Ren << NVMC_CONFIG_WEN_Pos; + while (NRF_NVMC->READY == NVMC_READY_READY_Busy){} + NVIC_SystemReset(); + } + #endif + + /* Configure GPIO pads as pPin Reset pin if Pin Reset capabilities desired. If CONFIG_GPIO_AS_PINRESET is not + defined, pin reset will not be available. One GPIO (see Product Specification to see which one) will then be + reserved for PinReset and not available as normal GPIO. */ + #if defined (CONFIG_GPIO_AS_PINRESET) + if (((NRF_UICR->PSELRESET[0] & UICR_PSELRESET_CONNECT_Msk) != (UICR_PSELRESET_CONNECT_Connected << UICR_PSELRESET_CONNECT_Pos)) || + ((NRF_UICR->PSELRESET[1] & UICR_PSELRESET_CONNECT_Msk) != (UICR_PSELRESET_CONNECT_Connected << UICR_PSELRESET_CONNECT_Pos))){ + NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Wen << NVMC_CONFIG_WEN_Pos; + while (NRF_NVMC->READY == NVMC_READY_READY_Busy){} + NRF_UICR->PSELRESET[0] = 21; + while (NRF_NVMC->READY == NVMC_READY_READY_Busy){} + NRF_UICR->PSELRESET[1] = 21; + while (NRF_NVMC->READY == NVMC_READY_READY_Busy){} + NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Ren << NVMC_CONFIG_WEN_Pos; + while (NRF_NVMC->READY == NVMC_READY_READY_Busy){} + NVIC_SystemReset(); + } + #endif + + /* Enable SWO trace functionality. If ENABLE_SWO is not defined, SWO pin will be used as GPIO (see Product + Specification to see which one). */ + #if defined (ENABLE_SWO) + CoreDebug->DEMCR |= CoreDebug_DEMCR_TRCENA_Msk; + NRF_CLOCK->TRACECONFIG |= CLOCK_TRACECONFIG_TRACEMUX_Serial << CLOCK_TRACECONFIG_TRACEMUX_Pos; + NRF_P0->PIN_CNF[18] = (GPIO_PIN_CNF_DRIVE_H0H1 << GPIO_PIN_CNF_DRIVE_Pos) | (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos) | (GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos); + #endif + + /* Enable Trace functionality. If ENABLE_TRACE is not defined, TRACE pins will be used as GPIOs (see Product + Specification to see which ones). */ + #if defined (ENABLE_TRACE) + CoreDebug->DEMCR |= CoreDebug_DEMCR_TRCENA_Msk; + NRF_CLOCK->TRACECONFIG |= CLOCK_TRACECONFIG_TRACEMUX_Parallel << CLOCK_TRACECONFIG_TRACEMUX_Pos; + NRF_P0->PIN_CNF[14] = (GPIO_PIN_CNF_DRIVE_H0H1 << GPIO_PIN_CNF_DRIVE_Pos) | (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos) | (GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos); + NRF_P0->PIN_CNF[15] = (GPIO_PIN_CNF_DRIVE_H0H1 << GPIO_PIN_CNF_DRIVE_Pos) | (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos) | (GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos); + NRF_P0->PIN_CNF[16] = (GPIO_PIN_CNF_DRIVE_H0H1 << GPIO_PIN_CNF_DRIVE_Pos) | (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos) | (GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos); + NRF_P0->PIN_CNF[18] = (GPIO_PIN_CNF_DRIVE_H0H1 << GPIO_PIN_CNF_DRIVE_Pos) | (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos) | (GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos); + NRF_P0->PIN_CNF[20] = (GPIO_PIN_CNF_DRIVE_H0H1 << GPIO_PIN_CNF_DRIVE_Pos) | (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos) | (GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos); + #endif + + SystemCoreClockUpdate(); + + NVIC_Relocate(); +} + + +static bool errata_16(void) +{ + if ((((*(uint32_t *)0xF0000FE0) & 0x000000FF) == 0x6) && (((*(uint32_t *)0xF0000FE4) & 0x0000000F) == 0x0)){ + if (((*(uint32_t *)0xF0000FE8) & 0x000000F0) == 0x30){ + return true; + } + } + + return false; +} + +static bool errata_31(void) +{ + if ((((*(uint32_t *)0xF0000FE0) & 0x000000FF) == 0x6) && (((*(uint32_t *)0xF0000FE4) & 0x0000000F) == 0x0)){ + if (((*(uint32_t *)0xF0000FE8) & 0x000000F0) == 0x30){ + return true; + } + if (((*(uint32_t *)0xF0000FE8) & 0x000000F0) == 0x40){ + return true; + } + if (((*(uint32_t *)0xF0000FE8) & 0x000000F0) == 0x50){ + return true; + } + } + + return false; +} + +static bool errata_32(void) +{ + if ((((*(uint32_t *)0xF0000FE0) & 0x000000FF) == 0x6) && (((*(uint32_t *)0xF0000FE4) & 0x0000000F) == 0x0)){ + if (((*(uint32_t *)0xF0000FE8) & 0x000000F0) == 0x30){ + return true; + } + } + + return false; +} + +static bool errata_36(void) +{ + if ((((*(uint32_t *)0xF0000FE0) & 0x000000FF) == 0x6) && (((*(uint32_t *)0xF0000FE4) & 0x0000000F) == 0x0)){ + if (((*(uint32_t *)0xF0000FE8) & 0x000000F0) == 0x30){ + return true; + } + if (((*(uint32_t *)0xF0000FE8) & 0x000000F0) == 0x40){ + return true; + } + if (((*(uint32_t *)0xF0000FE8) & 0x000000F0) == 0x50){ + return true; + } + } + + return false; +} + +static bool errata_37(void) +{ + if ((((*(uint32_t *)0xF0000FE0) & 0x000000FF) == 0x6) && (((*(uint32_t *)0xF0000FE4) & 0x0000000F) == 0x0)){ + if (((*(uint32_t *)0xF0000FE8) & 0x000000F0) == 0x30){ + return true; + } + } + + return false; +} + +static bool errata_57(void) +{ + if ((((*(uint32_t *)0xF0000FE0) & 0x000000FF) == 0x6) && (((*(uint32_t *)0xF0000FE4) & 0x0000000F) == 0x0)){ + if (((*(uint32_t *)0xF0000FE8) & 0x000000F0) == 0x30){ + return true; + } + } + + return false; +} + +static bool errata_66(void) +{ + if ((((*(uint32_t *)0xF0000FE0) & 0x000000FF) == 0x6) && (((*(uint32_t *)0xF0000FE4) & 0x0000000F) == 0x0)){ + if (((*(uint32_t *)0xF0000FE8) & 0x000000F0) == 0x50){ + return true; + } + } + + return false; +} + + +static bool errata_108(void) +{ + if ((((*(uint32_t *)0xF0000FE0) & 0x000000FF) == 0x6) && (((*(uint32_t *)0xF0000FE4) & 0x0000000F) == 0x0)){ + if (((*(uint32_t *)0xF0000FE8) & 0x000000F0) == 0x30){ + return true; + } + if (((*(uint32_t *)0xF0000FE8) & 0x000000F0) == 0x40){ + return true; + } + if (((*(uint32_t *)0xF0000FE8) & 0x000000F0) == 0x50){ + return true; + } + } + + return false; +} + + +/*lint --flb "Leave library region" */
