RAM Retention Example Application main file. More...

Macros
#define	RAM_MEMORY_TEST_ADDRESS (0x20002000UL)

#define	RAM_MEMORY_TEST_WORD (0xFEEDBEEFUL)

#define	RESET_MEMORY_TEST_BYTE (0x0DUL)

#define	MAX_TEST_ITERATIONS (1)

#define	SUCCESS_OUTPUT_VALUE (0xAB)

#define	PIN_GPIO_WAKEUP (7)

Functions
void	HardFault_Handler ()
	Function for handling HardFaults. In case something went wrong or System OFF did not work and reached the end of the program.

static void	gpio_config (void)
	Function for configuring I/O pins 8 - 16 as output, and pin 7 as wake up source.

static void	display_failure (void)
	Function for indicating failure by turning on all LEDs.

int	main (void)
	Function for application main entry.

Detailed Description

This file contains the source code for a sample application using RAM retention.

Use board setup A for this example.

Macro Definition Documentation

#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.

#define PIN_GPIO_WAKEUP (7)

GPIO pin configured to wake up system from System OFF on falling edge. It can be connected to a button which is high when not pressed.