| BlueNRG-1 Peripherals drivers Examples

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WDG_Wakeup_main.c File Reference

This example demonstrates how to us the watchdog timer to periodically wake-up the system from the standby mode. More...

`#include "BlueNRG1.h"`
`#include "SDK_EVAL_Config.h"`

Go to the source code of this file.

## Macros

#define | RC32K_FREQ 32768
#define | RELOAD_TIME(sec) ((sec*RC32K_FREQ)-3)

## Functions

void | WDG_Configuration (void)
| NVIC configuration. More...
int | main (void)
| Main program code. More...

## Detailed Description

This example demonstrates how to us the watchdog timer to periodically wake-up the system from the standby mode.

# ATOLLIC project

To use the project with ATOLLIC TrueSTUDIO for ARM, please follow the instructions below:

1. Open the ATOLLIC TrueSTUDIO for ARM and select File->Import... Project menu.
2. Select Existing Projects into Workspace.
3. Select the ATOLLIC project
4. Select desired configuration to build from Project->Manage Configurations
5. Select Project->Rebuild Project. This will recompile and link the entire application
6. To download the binary image, please connect STLink to JTAG connector in your board (if available).
7. Select Project->Download to download the related binary image.
8. Alternatively, open the BlueNRG1 GUI, put the board in bootloader mode and download the built binary image.

# KEIL project

To use the project with KEIL uVision 5 for ARM, please follow the instructions below:

1. Open the KEIL uVision 5 for ARM and select Project->Open Project menu.
2. Open the KEIL project `...\Project\BlueNRG1_Periph_Examples\WDG\WakeUp\MDK-ARM\WakeUp.uvprojx`
3. Select desired configuration to build
4. Select Project->Rebuild all target files. This will recompile and link the entire application
5. To download the binary image, please connect STLink to JTAG connector in your board (if available).
6. Select Project->Download to download the related binary image.
7. Alternatively, open the BlueNRG1 GUI, put the board in bootloader mode and download the built binary image.

# IAR project

To use the project with IAR Embedded Workbench for ARM, please follow the instructions below:

1. Open the Embedded Workbench for ARM and select File->Open->Workspace menu.
2. Open the IAR project `...\Project\BlueNRG1_Periph_Examples\WDG\WakeUp\EWARM\WakeUp.eww`
3. Select desired configuration to build
4. Select Project->Rebuild All. This will recompile and link the entire application
5. To download the binary image, please connect STLink to JTAG connector in your board (if available).
6. Select Project->Download and Debug to download the related binary image.
7. Alternatively, open the BlueNRG1 GUI, put the board in bootloader mode and download the built binary image.

## Project configurations

- `Release` - Release configuration

# Boards supported

- `STEVAL-IDB007V1`

# Power configuration settings

STEVAL-IDB007V1
Jumper name |  | Description
JP1 | JP2 |
ON 1-2 | ON 2-3 | USB supply power
ON 2-3 | ON 1-2 | The supply voltage must be provided through battery pins.
ON 1-2 |  | USB supply power to STM32L1, JP2 pin 2 external power to BlueNRG1

# Jumper settings

STEVAL-IDB007V1
Jumper name | Description
JP1 | 1-2: to provide power from USB (JP2:2-3). 2-3: to provide power from battery holder (JP2:1-2)
JP2 | 1-2: to provide power from battery holder (JP1:2-3). 2-3: to provide power from USB (JP1:1-2). Pin2 to VDD to provide external power supply to BlueNRG-1 (JP1: 1-2)
JP3 | pin 1 and 2 UART RX and TX of MCU. pin 3 GND.
JP4 | Fitted: to provide VBLUE to BlueNRG1. It can be used also for current measurement.
JP5 | Fitted : TEST pin to VBLUE. Not fitted: TEST pin to GND

# Pin settings

PIN name | STEVAL-IDB007V1
ADC1 | Not Used
ADC2 | Not Used
IO0 | Not Used
IO1 | Not Used
IO11 | Not Used
IO12 | Not Used
IO13 | Not Used
IO14 | Not Used
IO2 | Not Used
IO3 | Not Used
IO4 | Not Used
IO5 | Not Used
IO6 | Drive the LED DL1
IO7 | Not Used
IO8 | Not Used
TEST1 | Not Used

# LEDs description

LED name | STEVAL-IDB007V1
DL1 | Toggle
DL2 | Not Used
DL3 | Not Used
DL4 | Power

# Buttons description

BUTTON name | STEVAL-IDB007V1
PUSH1 | Not Used
PUSH2 | Not Used
RESET | Reset BlueNRG1

# Usage

The watchdog timer is a 32-bit down counter that divides the clock input (32.768 kHz) to produce an interrupt. A watchdog interrupt is generated each time the counter reaches zero. The counter is then reloaded with the content of the WDT_LR register. If the interrupt status flag is not cleared and a new interrupt is generated then the watchdog could generate a reset to reboot the system.

This example demonstrates the possibility to use the watchdog to periodically wake up the system from the standby mode using the watchdog interrupt.

The watchdog is configured to generate the interrupt with period of 1s. Then the watchdog is enabled and the system is switched to the standby mode. As soon as the watchdog interrupt is generated the system is waked up the LED1, IO6 pin, state is changed and the device enter the standby mode again. Therefore, the IO6 pin is toggled each 1s.

Definition in file WDG_Wakeup_main.c.