/******************************************************************************
* @brief Main function
*
*****************************************************************************/
int main(void)
{
/* Initialize chip - handle erratas */
CHIP_Init( );
/* Initialize clocks and oscillators */
cmuSetup( );
/* Initialize UART peripheral */
uartSetup( );
/* Initialize Development Kit in EBI mode */
BSP_Init(BSP_INIT_DEFAULT);
/* Enable RS-232 transceiver on Development Kit */
BSP_PeripheralAccess(BSP_RS232_UART, true);
/* When DVK is configured, and no more DVK access is needed, the interface can safely be disabled to save current */
BSP_Disable();
/* Write welcome message to UART */
uartPutData((uint8_t*) welcomeString, welLen);
/* Eternal while loop
* CPU will sleep during Rx and Tx. When a byte is transmitted, an interrupt
* wakes the CPU which copies the next byte in the txBuf queue to the
* UART TXDATA register.
*
* When the predefined termiation character is received, the all pending
* data in rxBuf is copied to txBuf and echoed back on the UART */
while (1)
{
/* Wait in EM1 while UART transmits */
EMU_EnterEM1();
/* Check if RX buffer has overflowed */
if (rxBuf.overflow)
{
rxBuf.overflow = false;
uartPutData((uint8_t*) overflowString, ofsLen);
}
/* Check if termination character is received */
if (rxBuf.data[(rxBuf.wrI - 1) % BUFFERSIZE] == TERMINATION_CHAR)
{
/* Copy received data to UART transmit queue */
uint8_t tmpBuf[BUFFERSIZE];
int len = uartGetData(tmpBuf, 0);
uartPutData(tmpBuf, len);
}
}
}
/**************************************************************************//**
* @brief Main function
*****************************************************************************/
int main(void)
{
const int msDelay=100;
char displayString[8];
LCD_AnimInit_TypeDef anim = {
true,
0x00,
lcdAnimShiftNone,
0x03,
lcdAnimShiftLeft,
lcdAnimLogicOr
};
LCD_FrameCountInit_TypeDef fc = {
true,
2, /* Update each 2nd frame */
lcdFCPrescDiv1,
};
/* Chip errata */
CHIP_Init();
/* Configure push button interrupts */
BSP_Init(BSP_INIT_DK_SPI);
/* If first word of user data page is non-zero, enable eA Profiler trace */
BSP_TraceProfilerSetup();
/* Initialize DK interrupt enable */
DkIrqInit();
/* Initialize GPIO interrupt */
GpioIrqInit();
/* Setup SysTick Timer for 1 msec interrupts */
if (SysTick_Config(SystemCoreClockGet() / 1000)) while (1) ;
/* Initialize LCD controller */
SegmentLCD_Init(false);
/* Run countdown for user to select energy mode */
msCountDown = 4000; /* milliseconds */
eMode = 0;
while(msCountDown > 0)
{
if ( eMode >=3 && eMode<=4) {
sprintf(displayString, "EM%d", eMode);
SegmentLCD_Write(displayString);
}
switch( eMode )
{
case 0:
SegmentLCD_Write("EM0 32M");
break;
case 1:
SegmentLCD_Write("EM1 32M");
break;
case 2:
SegmentLCD_Write("EM2 32K");
break;
case 3:
SegmentLCD_Write("EM3 ");
break;
case 4:
SegmentLCD_Write("EM4 ");
break;
case 5:
SegmentLCD_Write("EM2+RTC");
break;
case 6:
default:
SegmentLCD_Write("RTC+LCD");
break;
}
SegmentLCD_Number(msCountDown);
Delay(msDelay);
msCountDown -= msDelay;
}
/* Disable components, reenable when needed */
SegmentLCD_Disable();
RTC_Enable(false);
GPIO->IEN = 0x00000000;
NVIC_DisableIRQ(GPIO_EVEN_IRQn);
BSP_Disable();
GpioDisablePins();
/* Go to energy mode and wait for reset */
switch(eMode)
{
case 0:
/* Disable systick timer */
SysTick->CTRL = 0;
/* 32Mhz primes demo - running off HFXO */
CMU_ClockSelectSet(cmuClock_HF, cmuSelect_HFXO);
/* Disable HFRCO, LFRCO and all unwanted clocks */
CMU->OSCENCMD = CMU_OSCENCMD_HFRCODIS;
CMU->OSCENCMD = CMU_OSCENCMD_LFRCODIS;
CMU->HFPERCLKEN0 = 0x00000000;
CMU->HFCORECLKEN0 = 0x00000000;
CMU->LFACLKEN0 = 0x00000000;
CMU->LFBCLKEN0 = 0x00000000;
/* Supress Conditional Branch Target Prefetch */
MSC->READCTRL = MSC_READCTRL_MODE_WS1SCBTP;
{
#define PRIM_NUMS 64
uint32_t i, d, n;
uint32_t primes[PRIM_NUMS];
/* Find prime numbers forever */
while (1)
{
primes[0] = 1;
for (i = 1; i < PRIM_NUMS;)
{
for (n = primes[i - 1] + 1; ; n++)
{
for (d = 2; d <= n; d++)
{
if (n == d)
{
primes[i] = n;
goto nexti;
}
if (n%d == 0) break;
}
}
nexti:
i++;
}
}
}
case 1:
/* Disable systick timer */
SysTick->CTRL = 0;
CMU_ClockSelectSet(cmuClock_HF, cmuSelect_HFXO);
/* Disable HFRCO, LFRCO and all unwanted clocks */
CMU->OSCENCMD = CMU_OSCENCMD_HFRCODIS;
CMU->OSCENCMD = CMU_OSCENCMD_LFRCODIS;
CMU->HFPERCLKEN0 = 0x00000000;
CMU->HFCORECLKEN0 = 0x00000000;
CMU->LFACLKEN0 = 0x00000000;
CMU->LFBCLKEN0 = 0x00000000;
EMU_EnterEM1();
break;
case 2:
/* Enable LFRCO */
CMU->OSCENCMD = CMU_OSCENCMD_LFRCOEN;
/* Disable everything else */
CMU->OSCENCMD = CMU_OSCENCMD_LFXODIS;
CMU->HFPERCLKEN0 = 0x00000000;
CMU->HFCORECLKEN0 = 0x00000000;
CMU->LFACLKEN0 = 0x00000000;
CMU->LFBCLKEN0 = 0x00000000;
EMU_EnterEM2(false);
break;
case 3:
CMU->OSCENCMD = CMU_OSCENCMD_LFXODIS;
CMU->OSCENCMD = CMU_OSCENCMD_LFRCODIS;
CMU->HFPERCLKEN0 = 0x00000000;
CMU->HFCORECLKEN0 = 0x00000000;
CMU->LFACLKEN0 = 0x00000000;
CMU->LFBCLKEN0 = 0x00000000;
EMU_EnterEM3(false);
break;
case 4:
EMU_EnterEM4();
break;
case 5:
/* EM2 + RTC - only briefly wake up to reconfigure each second */
while(1)
{
RTCDRV_Trigger(2000, NULL);
EMU_EnterEM2(false);
}
case 6:
/* EM2 + RTC + LCD */
SegmentLCD_Init(false);
/* Animate LCD */
LCD_FrameCountInit(&fc);
LCD_AnimInit(&anim);
while(1)
{
SegmentLCD_Write("Energy");
/* Sleep in EM2 */
RTCDRV_Trigger(2000, NULL);
EMU_EnterEM2(false);
SegmentLCD_Write("Micro");
/* Sleep in EM2 */
RTCDRV_Trigger(2000, NULL);
EMU_EnterEM2(false);
}
case 7:
break;
}
return 0;
}
