/*********************************************************************//**
* @brief c_entry: Main program body
* @param[in] None
* @return None
**********************************************************************/
void c_entry (void)
{
EXTI_InitTypeDef EXTICfg;
/* Initialize debug via UART0
* – 115200bps
* – 8 data bit
* – No parity
* – 1 stop bit
* – No flow control
*/
debug_frmwrk_init();
// print welcome screen
print_menu();
/* Initialize EXT pin and registers
* P2.10 as /EINT0
*/
PINSEL_ConfigPin(2,10,1);
EXTI_Init();
EXTICfg.EXTI_Line = EXTI_EINT0;
/* edge sensitive */
EXTICfg.EXTI_Mode = EXTI_MODE_EDGE_SENSITIVE;
EXTICfg.EXTI_polarity = EXTI_POLARITY_LOW_ACTIVE_OR_FALLING_EDGE;
EXTI_ClearEXTIFlag(EXTI_EINT0);
EXTI_Config(&EXTICfg);
NVIC_SetPriorityGrouping(4);
NVIC_SetPriority(EINT0_IRQn, 0);
NVIC_EnableIRQ(EINT0_IRQn);
_DBG_("Press '1' to enter system in deep sleep mode.\n\r"\
"If you want to wake-up the system, press INT/WAKE-UP button.");
while(_DG !='1')
{
_DBG_("I'm waiting...\n\r");
}
_DBG_("I'm sleeping...");
// Enter target deep sleep mode
CLKPWR_DeepSleep();
SystemInit();
debug_frmwrk_init();
// MCU will be here after waking up
_DBG_("\n\r-------- I'm wake up! -------- ");
while (1);
}
/*********************************************************************//**
* @brief c_entry: Main program body
* @param[in] None
* @return int
**********************************************************************/
int c_entry (void)
{
/* Initialize debug via UART0
* – 115200bps
* – 8 data bit
* – No parity
* – 1 stop bit
* – No flow control
*/
debug_frmwrk_init();
// print welcome screen
print_menu();
// Init WDT, IRC OSC, interrupt mode, timeout = 2000000 us = 2s
WDT_Init(WDT_CLKSRC_IRC, WDT_MODE_INT_ONLY);
_DBG_("Press '1' to enter system in Deep Sleep mode");
while(_DG !='1');
NVIC_EnableIRQ(WDT_IRQn);
WDT_Start(WDT_TIMEOUT);
_DBG_("Enter Deep Sleep mode!");
_DBG_("Wait 2s for WDT wake-up system...");
/*---------- Disable and disconnect the main PLL0 before enter into Deep-Sleep
* or Power-Down mode <according to errata.lpc1768-16.March.2010> ------------
*/
LPC_SC->PLL0CON &= ~(1<<1); /* Disconnect the main PLL (PLL0) */
LPC_SC->PLL0FEED = 0xAA; /* Feed */
LPC_SC->PLL0FEED = 0x55; /* Feed */
while ((LPC_SC->PLL0STAT & (1<<25)) != 0x00); /* Wait for main PLL (PLL0) to disconnect */
LPC_SC->PLL0CON &= ~(1<<0); /* Turn off the main PLL (PLL0) */
LPC_SC->PLL0FEED = 0xAA; /* Feed */
LPC_SC->PLL0FEED = 0x55; /* Feed */
while ((LPC_SC->PLL0STAT & (1<<24)) != 0x00); /* Wait for main PLL (PLL0) to shut down */
/*------------Then enter into PowerDown mode ----------------------------------*/
// Enter target power down mode
CLKPWR_DeepSleep();
SystemInit();
debug_frmwrk_init();
_DBG_("\n\rSystem wake-up!\n\r");
while(1);
return 1;
}
