/**
* \brief Low power application entry point.
*
* \return Unused (ANSI-C compatibility).
*/
int main(void)
{
/* Initialize the SAM system */
sysclk_init();
g_ul_current_mck = sysclk_get_cpu_hz();
board_init();
/* Initialize the console uart */
configure_console();
/* Output example information */
puts(STRING_HEADER);
/* Initialize the chip for the power consumption test */
init_chip();
/* Set default clock and re-configure UART */
set_default_working_clock();
reconfigure_console(g_ul_current_mck, CONF_UART_BAUDRATE);
/* Test core consumption */
test_core();
while (1) {
}
}
/**
* \brief Test wait mode.
*/
static void test_wait_mode(void)
{
puts(STRING_WAIT);
#if SAMG55
/* Wait for the transmission done before changing clock */
while (!usart_is_tx_empty(CONSOLE_UART)) {
}
#else
/* Wait for the transmission done before changing clock */
while (!uart_is_tx_empty(CONSOLE_UART)) {
}
#endif
/* Configure fast RC oscillator */
pmc_switch_mck_to_sclk(PMC_MCKR_PRES_CLK_1);
#if (SAMG)
pmc_switch_mainck_to_fastrc(CKGR_MOR_MOSCRCF_8_MHz);
#else
pmc_switch_mainck_to_fastrc(CKGR_MOR_MOSCRCF_4_MHz);
#endif
pmc_switch_mck_to_mainck(PMC_PCK_PRES_CLK_1);
#if (SAMG)
g_ul_current_mck = 8000000; /* 8MHz */
#else
g_ul_current_mck = 4000000; /* 4MHz */
#endif
/* Disable unused clock to save power */
pmc_osc_disable_xtal(0);
example_disable_pll();
/* Set wakeup input for fast startup */
example_set_wakeup_from_wait_mode();
/* Enter into wait Mode */
pmc_enable_waitmode();
/* Set default clock and re-configure UART */
set_default_working_clock();
reconfigure_console(g_ul_current_mck, CONF_UART_BAUDRATE);
puts("Exit from wait Mode.\r");
}
/**
* \brief Test sleep Mode.
*/
static void test_sleep_mode(void)
{
/* Configure button for waking up sleep mode */
configure_button();
/* Select clock for sleep mode */
user_change_clock(STRING_SLEEP);
/* Disable UART */
pmc_disable_periph_clk(CONSOLE_UART_ID);
/* Enter into sleep Mode */
pmc_enable_sleepmode(0);
/* Set default clock and re-configure UART */
set_default_working_clock();
reconfigure_console(g_ul_current_mck, CONF_UART_BAUDRATE);
puts("Exit from sleep Mode.\r");
}
/**
* \brief Test active mode.
*/
static void test_active_mode(void)
{
/* Configure button for exiting from active mode */
configure_button();
g_ul_button_pressed = 0;
/* Select clock for active mode */
user_change_clock(STRING_ACTIVE);
/* Test active mode */
do {
/* Run Fibonacci calculation, n = 10 (may be changed) */
fib(10);
} while (!g_ul_button_pressed);
/* Set default clock and re-configure UART */
set_default_working_clock();
reconfigure_console(g_ul_current_mck, CONF_UART_BAUDRATE);
puts("Exit from active mode.\r");
}