int initSleep(){
LPC_SYSCON->PDRUNCFG = BF_PDRUNCFG_RUN; // Initialize power to chip modules
LPC_SYSCON->SYSAHBCLKCTRL = BF_SYSAHBCLKCTRL_RUN; // Initialize clocks
InitGPIOForSleep(); // Set all GPIO as outputs driving low
InitDeepSleep();
return 0;
}
int main(void)
{
LPC_SYSCON->PDRUNCFG = BF_PDRUNCFG_RUN; // Initialize power to chip modules
LPC_SYSCON->SYSAHBCLKCTRL = BF_SYSAHBCLKCTRL_RUN; // Initialize clocks
InitGPIOForSleep(); // Set all GPIO as outputs driving low
InitDeepSleep();
while(1)
{
Wait1mS(PROCDURATION_MS); // Active mode: Do some work
//while(1);
#ifdef FLASH_LED
SetBitsPort0(1<<7); // Turn on LED on LPCXpresso board
#else
SetBitsPort0(1<<6);
#endif
Wait1mS(LEDDURATION_MS); // Active mode: Do some work
// Current consumption is about the same (20% or so) no
// matter what code is running. Sleep mode can be entered
// in idle times to lower it dramatically.
#ifdef FLASH_LED
ClrBitsPort0(1<<7); // Turn off LED on LPCXpresso board
#else
ClrBitsPort0(1<<6);
#endif
EnterDeepSleep();
}
while(1);
}
int main (void)
{
if((*rom)->pPWRD == (void *)0xFFFFFFFF)
{
// This LPC does not have the power API
while(1);
}
LPC_GPIO0->DIR |= (1<<7); //set led direction
LPC_GPIO0->MASKED_ACCESS[(1<<7)] = (0<<7); //turn off the LED
LPC_SYSCON->SYSAHBCLKCTRL = (0xFFFFFFFF & (~(1<<15))); //enable all clocks except the WDT
/* user must select correct PLL input source before calling power/pll routines */
LPC_SYSCON->PDRUNCFG &= ~(1<<5); //power-up the system oscillator
for (i = 0; i != 24000; i++); //wait for it to stabilize
LPC_SYSCON->SYSPLLCLKSEL = 0x01; //system PLL source is the system oscillator
LPC_SYSCON->SYSPLLCLKUEN = 0x00; //update the system PLL source...
LPC_SYSCON->SYSPLLCLKUEN = 0x01; //...
LPC_SYSCON->MAINCLKSEL = 0x01; //main clock source is the PLL input
LPC_SYSCON->MAINCLKUEN = 0x00; //update the main clock source...
LPC_SYSCON->MAINCLKUEN = 0x01; //...
LPC_SYSCON->CLKOUTCLKSEL = 0x03; //CLKOUT = main clock
LPC_SYSCON->CLKOUTUEN = 0x01; //update CLKOUT selection...
LPC_SYSCON->CLKOUTUEN = 0x00; //...
LPC_SYSCON->CLKOUTUEN = 0x01; //...
LPC_SYSCON->CLKOUTDIV = 10; //generate ouptut @ 1/10 rate
LPC_IOCON->PIO0_1 &= ~0x07; //select CLKOUT @ PIO0_1...
LPC_IOCON->PIO0_1 |= 1; //...
//configure CT16B1_MAT0 as a system/10 clock out (P0_21)
// LPC_IOCON->PIO0_21 = (LPC_IOCON->PIO0_21 & ~0x7) | 1; //select CT16B1_MAT0 @ P0_21
LPC_SYSCON->SYSAHBCLKCTRL |= (1<<8); //enable CT16B1 clock
LPC_TMR16B1->TCR = 0x00; //stop the timer
LPC_TMR16B1->TCR = 0x02; //reset the timer
LPC_TMR16B1->TCR = 0x00; //release the reset
LPC_TMR16B1->CTCR = 0x00; //count on peripheral clock rising edges only
LPC_TMR16B1->PR = 0; //max rate (no prescaler)
LPC_TMR16B1->MR0 = 10/2-1; //match output = 1/10 timer's clock
LPC_TMR16B1->MCR = 1<<1; //reset on MR0
LPC_TMR16B1->EMR = 3<<4; //toggle MAT0
LPC_TMR16B1->TCR = 0x01; //let the timer run
/* user must select the correct operating frequency before setting up the PLL */
/* or the voltage regulator and the flash interface setup might not be able */
/* to support application running at higher frequencies */
command[0] = 48; //system freq 48 MHz
// command[1] = PARAM_DEFAULT; //specify system power to default
// command[1] = PARAM_CPU_EXEC; //specify system power for cpu performance run
// command[1] = PARAM_EFFICIENCY; //specify system power for efficiency
command[1] = PARAM_LOW_CURRENT; //specify system power for low active current
(*rom)->pPWRD->set_power(command,result); //set system power
if (result[0] != PARAM_CMD_CUCCESS){ //if a failure is reported...
while(1); //... stay in the loop
}
/* the pll setup routine is searching for a setup based on the specified input */
/* and output frequency and after setting up the main PLL switches main clock */
/* source from PLL in to PLL out */
command[0] = 12000; //PLL's input freq 12000
command[1] = 48000; //CPU's freq 48000
command[2] = CPU_FREQ_EQU; //specify exact frequency
command[3] = 0; //infinitely wait for the PLL to lock
(*rom)->pPWRD->set_pll(command,result); //set the PLL
if ((result[0] != PLL_CMD_CUCCESS)){ //if a failure is reported...
while(1); //... stay in the loop
}
/* before changing the PLL setup main clock source must be switched from */
/* PLL in to PLL out!!! */
while(1){
//48 MHz setup begin
LPC_SYSCON->MAINCLKSEL = 0x01; //main clock source is the PLL input
LPC_SYSCON->MAINCLKUEN = 0x00; //update the main clock source...
LPC_SYSCON->MAINCLKUEN = 0x01; //...
for (i = 0; i != 10000; i++); //wait for a while
command[0] = 48; //system freq 48 MHz
command[1] = PARAM_LOW_CURRENT; //specify system power for low active current
(*rom)->pPWRD->set_power(command,result); //set system power
if (result[0] != PARAM_CMD_CUCCESS){ //if a failure is reported...
while(1); //... stay in the loop
}
command[0] = 12000; //PLL's input freq 12000
command[1] = 48000; //CPU's freq 48000
command[2] = CPU_FREQ_EQU; //specify exact frequency
command[3] = 0; //infinitely wait for the PLL to lock
(*rom)->pPWRD->set_pll(command,result); //set the PLL
if ((result[0] != PLL_CMD_CUCCESS)){ //if a failure is reported...
while(1); //... stay in the loop
}
for (i = 0; i != 10000; i++);
//48 MHz setup end
fibonacci(30);
LPC_GPIO0->MASKED_ACCESS[(1<<7)]=(1<<7);
Wait1mS(100);
LPC_GPIO0->MASKED_ACCESS[(1<<7)]=(0<<7);
//24 MHz setup begin
LPC_SYSCON->MAINCLKSEL = 0x01; //main clock source is the PLL input
LPC_SYSCON->MAINCLKUEN = 0x00; //update the main clock source...
LPC_SYSCON->MAINCLKUEN = 0x01; //...
for (i = 0; i != 10000; i++); //wait for a while
command[0] = 24; //system freq 24 MHz
command[1] = PARAM_LOW_CURRENT; //specify system power for low active current
(*rom)->pPWRD->set_power(command,result); //set system power
if (result[0] != PARAM_CMD_CUCCESS){ //if a failure is reported...
while(1); //... stay in the loop
}
command[0] = 12000; //PLL's input freq 12000
command[1] = 24000; //CPU's freq 24000
command[2] = CPU_FREQ_EQU; //specify exact frequency
command[3] = 0; //infinitely wait for the PLL to lock
(*rom)->pPWRD->set_pll(command,result); //set the PLL
if ((result[0] != PLL_CMD_CUCCESS)){ //if a failure is reported...
while(1); //... stay in the loop
}
for (i = 0; i != 5000; i++);
//24 MHz setup end
fibonacci(30);
LPC_GPIO0->MASKED_ACCESS[(1<<7)]=(1<<7);
Wait1mS(100);
LPC_GPIO0->MASKED_ACCESS[(1<<7)]=(0<<7);
//18 MHz setup begin
LPC_SYSCON->MAINCLKSEL = 0x01; //main clock source is the PLL input
LPC_SYSCON->MAINCLKUEN = 0x00; //update the main clock source...
LPC_SYSCON->MAINCLKUEN = 0x01; //...
for (i = 0; i != 10000; i++); //wait for a while
command[0] = 18; //system freq 18 MHz
command[1] = PARAM_LOW_CURRENT; //specify system power for low active current
(*rom)->pPWRD->set_power(command,result); //set system power
if (result[0] != PARAM_CMD_CUCCESS){ //if a failure is reported...
while(1); //... stay in the loop
}
command[0] = 12000; //PLL's input freq 12000
command[1] = 18000; //CPU's freq 18000
command[2] = CPU_FREQ_EQU; //specify exact frequency
command[3] = 0; //infinitely wait for the PLL to lock
(*rom)->pPWRD->set_pll(command,result); //set the PLL
if ((result[0] != PLL_CMD_CUCCESS)){ //if a failure is reported...
while(1); //... stay in the loop
}
for (i = 0; i != 3750; i++);
//18 MHz setup end
fibonacci(30);
LPC_GPIO0->MASKED_ACCESS[(1<<7)]=(1<<7);
Wait1mS(100);
LPC_GPIO0->MASKED_ACCESS[(1<<7)]=(0<<7);
//3 MHz setup begin
LPC_SYSCON->MAINCLKSEL = 0x01; //main clock source is the PLL input
LPC_SYSCON->MAINCLKUEN = 0x00; //update the main clock source...
LPC_SYSCON->MAINCLKUEN = 0x01; //...
for (i = 0; i != 10000; i++); //wait for a while
command[0] = 3; //system freq 3 MHz
command[1] = PARAM_LOW_CURRENT; //specify system power for low active current
(*rom)->pPWRD->set_power(command,result); //set system power
if (result[0] != PARAM_CMD_CUCCESS){ //if a failure is reported...
while(1); //... stay in the loop
}
command[0] = 12000; //PLL's input freq 12000
command[1] = 3000; //CPU's freq 3000
command[2] = CPU_FREQ_EQU; //specify exact frequency
command[3] = 0; //infinitely wait for the PLL to lock
(*rom)->pPWRD->set_pll(command,result); //set the PLL
if ((result[0] != PLL_CMD_CUCCESS)){ //if a failure is reported...
while(1); //... stay in the loop
}
for (i = 0; i != 625; i++);
//3 MHz setup end
fibonacci(30);
LPC_GPIO0->MASKED_ACCESS[(1<<7)]=(1<<7);
Wait1mS(100);
LPC_GPIO0->MASKED_ACCESS[(1<<7)]=(0<<7);
InitGPIOForSleep(); // Set all GPIO as outputs driving low
InitDeepSleep();
EnterDeepSleep();
}
}
