Hi
I want to run RAM retention sample example with sd_app_evt_wait(void) .is it possible? is it require soft device to load first? I have included S110 soft device of nrf51 but it is giving me error as
1)Error[Pe223]: function "sd_app_evt_wait" declared implicitly E:\NRF51\nRF51_SDK_10.0.0_dc26b5e\examples\peripheral\ram_retention\power_save.c 87
2)Error[Pe223]: function "APP_ERROR_CHECK" declared implicitly E:\NRF51\nRF51_SDK_10.0.0_dc26b5e\examples\peripheral\ram_retention\power_save.c 88
this is the same sample code with only one modification: Please help me in this regards.
/* Copyright (c) 2014 Nordic Semiconductor. All Rights Reserved.
*
* The information contained herein is property of Nordic Semiconductor ASA.
* Terms and conditions of usage are described in detail in NORDIC
* SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT.
*
* Licensees are granted free, non-transferable use of the information. NO
* WARRANTY of ANY KIND is provided. This heading must NOT be removed from
* the file.
*
*/
/** @file
* @defgroup ram_retention_example_main main.c
* @{
* @ingroup ram_retention_example
* @brief RAM Retention Example Application main file.
*
* This file contains the source code for a sample application using RAM retention.
*
*/
#include <stdbool.h>
#include <stdint.h>
#include "bsp.h"
#include "nrf_delay.h"
#include "nrf_gpio.h"
#define RAM_MEMORY_TEST_ADDRESS (0x20002000UL) /**< Address in RAM where test word (RAM_MEMORY_TEST_WORD) is written before System OFF and checked after System RESET.*/
#define RAM_MEMORY_TEST_WORD (0xFEEDBEEFUL) /**< Test word that is written to RAM address RAM_MEMORY_TEST_ADDRESS. */
#define RESET_MEMORY_TEST_BYTE (0x0DUL) /**< Known sequence written to a special register to check if this wake up is from System OFF. */
#define MAX_TEST_ITERATIONS (1) /**< Maximum number of iterations this example will run. */
#define SUCCESS_OUTPUT_VALUE (0xAB) /**< If RAM retention is tested for MAX_TEST_ITERATIONS, this value will be given as output.*/
#ifdef BSP_BUTTON_0
#define PIN_GPIO_WAKEUP BSP_BUTTON_0 /**< Wake up pin number. */
#endif
#ifndef PIN_GPIO_WAKEUP
#error "Please indicate wake up pin"
#endif
#ifdef BSP_LED_0
#define READY_PIN_NUMBER BSP_LED_0 /**< Pin number for output. */
#endif
#ifndef READY_PIN_NUMBER
#error "Please indicate output pin"
#endif
#ifdef BSP_LED_1
#define SUCCESS_PIN_NUMBER BSP_LED_1 /**< Pin number for output. */
#endif
#ifndef SUCCESS_PIN_NUMBER
#error "Please indicate output pin"
#endif
/** @brief Function for handling HardFaults. In case something went wrong
* or System OFF did not work and reached the end of the program.
*/
void HardFault_Handler()
{
LEDS_ON(LEDS_MASK);
// Loop forever.
while (true)
{
// Do nothing.
}
}
/** @brief Function for indicating failure.
*/
static void display_failure(void)
{
LEDS_ON(LEDS_MASK);
// Loop forever.
while (true)
{
// Do nothing.
}
}
static void power_manage(void)
{
uint32_t err_code = sd_app_evt_wait();
APP_ERROR_CHECK(err_code);
}
/**
* @brief Function for application main entry.
*/
int main(void)
{
uint32_t * volatile p_ram_test = (uint32_t *)RAM_MEMORY_TEST_ADDRESS;
uint32_t loop_count = 0;
LEDS_CONFIGURE(LEDS_MASK);
LEDS_OFF(LEDS_MASK);
// This pin is used for waking up from System OFF and is active low, enabling sense capabilities.
nrf_gpio_cfg_sense_input(PIN_GPIO_WAKEUP, BUTTON_PULL, NRF_GPIO_PIN_SENSE_LOW);
// Workaround for PAN_028 rev1.1 anomaly 22 - System: Issues with disable System OFF mechanism
nrf_delay_ms(1);
// Check if the system woke up from System OFF mode by reading the NRF_POWER->GPREGRET register which has
// retained the value written before going to System OFF. Below is the layout for usage for
// NRF_POWER->GPREGRET register.
// BITS | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0
// --------------------------------------------------------------------
// | SPECIAL_SEQUENCE | LOOP_COUNT
// --------------------------------------------------------------------
///
if ((NRF_POWER->GPREGRET >> 4) == RESET_MEMORY_TEST_BYTE)
{
// Take the loop_count value.
loop_count = (uint8_t)(NRF_POWER->GPREGRET & 0xFUL);
NRF_POWER->GPREGRET = 0;
if (loop_count >= (uint8_t)MAX_TEST_ITERATIONS)
{
// clear GPREGRET register before exit.
NRF_POWER->GPREGRET = 0;
LEDS_ON(1 << SUCCESS_PIN_NUMBER);
while (true)
{
power_manage();
}
}
if (*p_ram_test != RAM_MEMORY_TEST_WORD)
{
display_failure();
}
*p_ram_test = 0;
}
// Write the known sequence + loop_count to the GPREGRET register.
loop_count++;
NRF_POWER->GPREGRET = ( (RESET_MEMORY_TEST_BYTE << 4) | loop_count);
// Write the known value to the known address in RAM, enable RAM retention, set System OFF, and wait
// for GPIO wakeup from external source.
LEDS_ON(1 << READY_PIN_NUMBER);
nrf_delay_ms(1000);
// Switch on both RAM banks when in System OFF mode.
NRF_POWER->RAMON |= (POWER_RAMON_OFFRAM0_RAM0On << POWER_RAMON_OFFRAM0_Pos) |
(POWER_RAMON_OFFRAM1_RAM1On << POWER_RAMON_OFFRAM1_Pos);
// Write test word to RAM memory.
*p_ram_test = RAM_MEMORY_TEST_WORD;
LEDS_OFF(LEDS_MASK);
// Enter System OFF and wait for wake up from GPIO detect signal.
NRF_POWER->SYSTEMOFF = 0x1;
// This code will only be reached if System OFF did not work and will trigger a hard-fault which will
// be handled in HardFault_Handler(). If wake the up condition is already active while System OFF is triggered,
// then the system will go to System OFF and wake up immediately with a System RESET.
display_failure();
}
/** @} */
