I am testing the Atmel SAM R21 on the Xplained Pro development board. According to Atmel one can achieve 2 µA to 20 µA. However, I always get currents greater than or equal to 450 µA. I measure the current at the current measurement connectors.
This is my simple test program:
Code: Select all
#include "conf_board.h"
#include "avr2025_mac.h"
#include "delay.h"
#include <asf.h>
int main(void) {
irq_initialize_vectors();
system_init();
delay_init();
wpan_init();
system_set_sleepmode(SYSTEM_SLEEPMODE_STANDBY);
system_sleep();
}
Thank you in advance!
Dominik
conf_clocks.h:
Code: Select all
#include <clock.h>
#ifndef CONF_CLOCKS_H_INCLUDED
# define CONF_CLOCKS_H_INCLUDED
/* System clock bus configuration */
# define CONF_CLOCK_CPU_CLOCK_FAILURE_DETECT false
# define CONF_CLOCK_FLASH_WAIT_STATES 2
# define CONF_CLOCK_CPU_DIVIDER SYSTEM_MAIN_CLOCK_DIV_1
# define CONF_CLOCK_APBA_DIVIDER SYSTEM_MAIN_CLOCK_DIV_1
# define CONF_CLOCK_APBB_DIVIDER SYSTEM_MAIN_CLOCK_DIV_1
# define CONF_CLOCK_APBC_DIVIDER SYSTEM_MAIN_CLOCK_DIV_1
/* SYSTEM_CLOCK_SOURCE_OSC8M configuration - Internal 8MHz oscillator */
# define CONF_CLOCK_OSC8M_PRESCALER SYSTEM_OSC8M_DIV_1
# define CONF_CLOCK_OSC8M_ON_DEMAND true
# define CONF_CLOCK_OSC8M_RUN_IN_STANDBY true
/* SYSTEM_CLOCK_SOURCE_XOSC configuration - External clock/oscillator */
# define CONF_CLOCK_XOSC_ENABLE false
# define CONF_CLOCK_XOSC_EXTERNAL_CRYSTAL SYSTEM_CLOCK_EXTERNAL_CRYSTAL
# define CONF_CLOCK_XOSC_EXTERNAL_FREQUENCY 12000000UL
# define CONF_CLOCK_XOSC_STARTUP_TIME SYSTEM_XOSC_STARTUP_32768
# define CONF_CLOCK_XOSC_AUTO_GAIN_CONTROL true
# define CONF_CLOCK_XOSC_ON_DEMAND true
# define CONF_CLOCK_XOSC_RUN_IN_STANDBY false
/* SYSTEM_CLOCK_SOURCE_XOSC32K configuration - External 32KHz crystal/clock
* oscillator */
# define CONF_CLOCK_XOSC32K_ENABLE false
# define CONF_CLOCK_XOSC32K_EXTERNAL_CRYSTAL SYSTEM_CLOCK_EXTERNAL_CRYSTAL
# define CONF_CLOCK_XOSC32K_STARTUP_TIME SYSTEM_XOSC32K_STARTUP_65536
# define CONF_CLOCK_XOSC32K_AUTO_AMPLITUDE_CONTROL true
# define CONF_CLOCK_XOSC32K_ENABLE_1KHZ_OUPUT false
# define CONF_CLOCK_XOSC32K_ENABLE_32KHZ_OUTPUT true
# define CONF_CLOCK_XOSC32K_ON_DEMAND true
# define CONF_CLOCK_XOSC32K_RUN_IN_STANDBY false
/* SYSTEM_CLOCK_SOURCE_OSC32K configuration - Internal 32KHz oscillator */
# define CONF_CLOCK_OSC32K_ENABLE true
# define CONF_CLOCK_OSC32K_STARTUP_TIME SYSTEM_OSC32K_STARTUP_130
# define CONF_CLOCK_OSC32K_ENABLE_1KHZ_OUTPUT true
# define CONF_CLOCK_OSC32K_ENABLE_32KHZ_OUTPUT true
# define CONF_CLOCK_OSC32K_ON_DEMAND true
# define CONF_CLOCK_OSC32K_RUN_IN_STANDBY true
/* SYSTEM_CLOCK_SOURCE_DFLL configuration - Digital Frequency Locked Loop */
# define CONF_CLOCK_DFLL_ENABLE true
# define CONF_CLOCK_DFLL_LOOP_MODE SYSTEM_CLOCK_DFLL_LOOP_MODE_CLOSED
# define CONF_CLOCK_DFLL_ON_DEMAND false
# define CONF_CLOCK_DFLL_RUN_IN_STANDBY false
/* DFLL open loop mode configuration */
# define CONF_CLOCK_DFLL_FINE_VALUE (512)
/* DFLL closed loop mode configuration */
# define CONF_CLOCK_DFLL_SOURCE_GCLK_GENERATOR GCLK_GENERATOR_2
# define CONF_CLOCK_DFLL_MULTIPLY_FACTOR (48000000 / 32768)
# define CONF_CLOCK_DFLL_QUICK_LOCK true
# define CONF_CLOCK_DFLL_TRACK_AFTER_FINE_LOCK true
# define CONF_CLOCK_DFLL_KEEP_LOCK_ON_WAKEUP true
# define CONF_CLOCK_DFLL_ENABLE_CHILL_CYCLE true
# define CONF_CLOCK_DFLL_MAX_COARSE_STEP_SIZE (0x1f / 4)
# define CONF_CLOCK_DFLL_MAX_FINE_STEP_SIZE (0xff / 4)
/* SYSTEM_CLOCK_SOURCE_DPLL configuration - Digital Phase-Locked Loop */
# define CONF_CLOCK_DPLL_ENABLE false
# define CONF_CLOCK_DPLL_ON_DEMAND true
# define CONF_CLOCK_DPLL_RUN_IN_STANDBY false
# define CONF_CLOCK_DPLL_LOCK_BYPASS false
# define CONF_CLOCK_DPLL_WAKE_UP_FAST false
# define CONF_CLOCK_DPLL_LOW_POWER_ENABLE false
# define CONF_CLOCK_DPLL_LOCK_TIME SYSTEM_CLOCK_SOURCE_DPLL_LOCK_TIME_DEFAULT
# define CONF_CLOCK_DPLL_REFERENCE_CLOCK SYSTEM_CLOCK_SOURCE_DPLL_REFERENCE_CLOCK_XOSC32K
# define CONF_CLOCK_DPLL_FILTER SYSTEM_CLOCK_SOURCE_DPLL_FILTER_DEFAULT
# define CONF_CLOCK_DPLL_REFERENCE_FREQUENCY 32768
# define CONF_CLOCK_DPLL_REFERENCE_DIVIDER 1
# define CONF_CLOCK_DPLL_OUTPUT_FREQUENCY 48000000
/* DPLL GCLK reference configuration */
# define CONF_CLOCK_DPLL_REFERENCE_GCLK_GENERATOR GCLK_GENERATOR_1
/* DPLL GCLK lock timer configuration */
# define CONF_CLOCK_DPLL_LOCK_GCLK_GENERATOR GCLK_GENERATOR_1
/* Set this to true to configure the GCLK when running clocks_init. If set to
* false, none of the GCLK generators will be configured in clocks_init(). */
# define CONF_CLOCK_CONFIGURE_GCLK true
/* Configure GCLK generator 0 (Main Clock) */
# define CONF_CLOCK_GCLK_0_ENABLE true
# define CONF_CLOCK_GCLK_0_RUN_IN_STANDBY false
# define CONF_CLOCK_GCLK_0_CLOCK_SOURCE SYSTEM_CLOCK_SOURCE_DFLL
# define CONF_CLOCK_GCLK_0_PRESCALER 1
# define CONF_CLOCK_GCLK_0_OUTPUT_ENABLE false
<all other clock generators are disabled>