//*****************************************************************************
//
// Uses the fColorWheelPos variable to update the color mix shown on the RGB
//
// This function is called when system has decided it is time to enter
// Hibernate. This will prepare the hibernate peripheral, save the system
// state and then enter hibernate mode.
//
//*****************************************************************************
void
AppHibernateEnter(void)
{
//
// Alert UART command line users that we are going to hibernate
//
UARTprintf("Entering Hibernate...\n");
//
// Prepare Hibernation Module
//
HibernateGPIORetentionEnable();
HibernateRTCSet(0);
HibernateRTCEnable();
HibernateRTCMatchSet(0, 5);
HibernateWakeSet(HIBERNATE_WAKE_PIN | HIBERNATE_WAKE_RTC);
//
// Store state information to battery backed memory
// since sizeof returns number of bytes we convert to words and force
// a rounding up to next whole word.
//
HibernateDataSet((uint32_t*)&g_sAppState, sizeof(tAppState)/4+1);
//
// Disable the LED for 100 milliseconds to let user know we are
// ready for hibernate and will hibernate on relase of buttons
//
RGBDisable();
SysCtlDelay(SysCtlClockGet()/3/10);
RGBEnable();
//
// Wait for wake button to be released prior to going into hibernate
//
while(g_sAppState.ui32Buttons & RIGHT_BUTTON)
{
//
//Delay for about 300 clock ticks to allow time for interrupts to
//sense that button is released
//
SysCtlDelay(100);
}
//
// Disable the LED for power savings and go to hibernate mode
//
RGBDisable();
HibernateRequest();
}
//*****************************************************************************
//
//! This is the hibernate module handler.
//! When the RTC timer expires, an interrupt is generated and the the GPS
//! data is parsed and logged.
//!
//! If the Wake button is pressed, low power mode is disabled.
//! A reset/power cycle is required to re-enable low power mode after Wake has
//! been pressed.
//
//*****************************************************************************
void lowPowerMode(int delaySeconds) {
uint32_t ui32Status;
//
// Set the RTC to 0 or an initial value. The RTC can be set once when the
// system is initialized after the cold startup and then left to run. Or
// it can be initialized before every hibernate.
//
HibernateRTCSet(0);
//
// Set the match 0 register for 30 seconds from now.
//
HibernateRTCMatchSet(0, HibernateRTCGet() + delaySeconds);
//
// Clear any pending status.
//
ui32Status = HibernateIntStatus(0);
HibernateIntClear(ui32Status);
//
// Save the program state information. The state information is stored in
// the pui32NVData[] array. It is not necessary to save the full 16 words
// of data, only as much as is actually needed by the program.
//
HibernateDataSet(&lowPowerOn, 1);
//
// Configure to wake on RTC match or when wake button is pressed.
//
HibernateWakeSet(HIBERNATE_WAKE_RTC | HIBERNATE_WAKE_PIN);
//
// Request hibernation. The following call may return because it takes a
// finite amount of time for power to be removed.
//
HibernateRequest();
//
// Spin here to wait for the power to be removed.
//
for(;;)
{
}
} // End function lowPowerMode
/**************************
YOSEMIT XOLALPA ROSALES
PROF. VENKI
CPE403
TIVAC-LAB06
**************************/
int main(void)
{
SysCtlClockSet(SYSCTL_SYSDIV_5|SYSCTL_USE_PLL|SYSCTL_XTAL_16MHZ|SYSCTL_OSC_MAIN);
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);
GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE, GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3);
GPIOPinWrite(GPIO_PORTF_BASE,GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3, 0x08);
SysCtlPeripheralEnable(SYSCTL_PERIPH_HIBERNATE);
HibernateEnableExpClk(SysCtlClockGet());
HibernateGPIORetentionEnable();
SysCtlDelay(64000000);
HibernateRTCSet(0);
HibernateRTCEnable();
HibernateRTCMatchSet(0,5);
HibernateWakeSet(HIBERNATE_WAKE_PIN | HIBERNATE_WAKE_RTC);
GPIOPinWrite(GPIO_PORTF_BASE,GPIO_PIN_3, 0x00);
HibernateRequest();
while(1)
{
}
}
//*****************************************************************************
//
// Run the hibernate example. Use a loop to put the microcontroller into
// hibernate mode, and to wake up based on time. Also allow the user to cause
// it to hibernate and/or wake up based on button presses.
//
//*****************************************************************************
int
main(void)
{
uint32_t ui32Idx;
uint32_t ui32Status = 0;
uint32_t ui32HibernateCount = 0;
tContext sContext;
tRectangle sRect;
//
// Enable lazy stacking for interrupt handlers. This allows floating-point
// instructions to be used within interrupt handlers, but at the expense of
// extra stack usage.
//
ROM_FPULazyStackingEnable();
//
// Set the clocking to run directly from the crystal.
//
ROM_SysCtlClockSet(SYSCTL_SYSDIV_1 | SYSCTL_USE_OSC | SYSCTL_OSC_MAIN |
SYSCTL_XTAL_16MHZ);
//
// Initialize the UART.
//
ConfigureUART();
//
// Initialize the OLED display
//
CFAL96x64x16Init();
//
// Initialize the graphics context.
//
GrContextInit(&sContext, &g_sCFAL96x64x16);
//
// Fill the top 24 rows of the screen with blue to create the banner.
//
sRect.i16XMin = 0;
sRect.i16YMin = 0;
sRect.i16XMax = GrContextDpyWidthGet(&sContext) - 1;
sRect.i16YMax = 9;
GrContextForegroundSet(&sContext, ClrDarkBlue);
GrRectFill(&sContext, &sRect);
//
// Change foreground for white text.
//
GrContextForegroundSet(&sContext, ClrWhite);
//
// Put the application name in the middle of the banner.
//
GrContextFontSet(&sContext, g_psFontFixed6x8);
GrStringDrawCentered(&sContext, "hibernate", -1,
GrContextDpyWidthGet(&sContext) / 2, 4, 0);
//
// Initialize the buttons driver
//
ButtonsInit();
//
// Set up systick to generate interrupts at 100 Hz.
//
ROM_SysTickPeriodSet(ROM_SysCtlClockGet() / 100);
ROM_SysTickIntEnable();
ROM_SysTickEnable();
//
// Enable the Hibernation module.
//
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_HIBERNATE);
//
// Print wake cause message on display.
//
GrStringDrawCentered(&sContext, "Wake due to:", -1,
GrContextDpyWidthGet(&sContext) / 2, Row(2) + 4,
true);
//
// Check to see if Hibernation module is already active, which could mean
// that the processor is waking from a hibernation.
//
if(HibernateIsActive())
{
//
// Read the status bits to see what caused the wake.
//
ui32Status = HibernateIntStatus(0);
HibernateIntClear(ui32Status);
//
// Wake was due to the push button.
//
if(ui32Status & HIBERNATE_INT_PIN_WAKE)
{
GrStringDrawCentered(&sContext, "BUTTON", -1,
GrContextDpyWidthGet(&sContext) / 2,
Row(3) + 4, true);
}
//
// Wake was due to RTC match
//
else if(ui32Status & HIBERNATE_INT_RTC_MATCH_0)
{
GrStringDrawCentered(&sContext, "TIMEOUT", -1,
GrContextDpyWidthGet(&sContext) / 2,
Row(3) + 4, true);
}
//
// Wake is due to neither button nor RTC, so it must have been a hard
// reset.
//
else
{
GrStringDrawCentered(&sContext, "RESET", -1,
GrContextDpyWidthGet(&sContext) / 2,
Row(3) + 4, true);
}
//
// If the wake is due to button or RTC, then read the first location
// from the battery backed memory, as the hibernation count.
//
if(ui32Status & (HIBERNATE_INT_PIN_WAKE | HIBERNATE_INT_RTC_MATCH_0))
{
HibernateDataGet(&ui32HibernateCount, 1);
}
}
//
// Enable the Hibernation module. This should always be called, even if
// the module was already enabled, because this function also initializes
// some timing parameters.
//
HibernateEnableExpClk(ROM_SysCtlClockGet());
//
// If the wake was not due to button or RTC match, then it was a reset.
//
if(!(ui32Status & (HIBERNATE_INT_PIN_WAKE | HIBERNATE_INT_RTC_MATCH_0)))
{
//
// Configure the module clock source.
//
HibernateClockConfig(HIBERNATE_OSC_LOWDRIVE);
//
// Finish the wake cause message.
//
GrStringDrawCentered(&sContext, "RESET", -1,
GrContextDpyWidthGet(&sContext) / 2,
Row(3) + 4, true);
//
// Wait a couple of seconds in case we need to break in with the
// debugger.
//
SysTickWait(3 * 100);
//
// Allow time for the crystal to power up. This line is separated from
// the above to make it clear this is still needed, even if the above
// delay is removed.
//
SysTickWait(15);
}
//
// Print the count of times that hibernate has occurred.
//
usnprintf(g_pcBuf, sizeof(g_pcBuf), "Hib count=%4u", ui32HibernateCount);
GrStringDrawCentered(&sContext, g_pcBuf, -1,
GrContextDpyWidthGet(&sContext) / 2,
Row(1) + 4, true);
//
// Print messages on the screen about hibernation.
//
GrStringDrawCentered(&sContext, "Select to Hib", -1,
GrContextDpyWidthGet(&sContext) / 2,
Row(4) + 4, true);
GrStringDrawCentered(&sContext, "Wake in 5 s,", -1,
GrContextDpyWidthGet(&sContext) / 2,
Row(5) + 4, true);
GrStringDrawCentered(&sContext, "or press Select", -1,
GrContextDpyWidthGet(&sContext) / 2,
Row(6) + 4, true);
GrStringDrawCentered(&sContext, "for immed. wake.", -1,
GrContextDpyWidthGet(&sContext) / 2,
Row(7) + 4, true);
//
// Clear the button pressed flag, in case it was held down at the
// beginning.
//
bSelectPressed = 0;
//
// Wait for user to press the button.
//
while(!bSelectPressed)
{
//
// Wait a bit before looping again.
//
SysTickWait(10);
}
//
// Tell user to release the button.
//
GrStringDrawCentered(&sContext, " ", -1,
GrContextDpyWidthGet(&sContext) / 2,
Row(4) + 4, true);
GrStringDrawCentered(&sContext, " ", -1,
GrContextDpyWidthGet(&sContext) / 2,
Row(5) + 4, true);
GrStringDrawCentered(&sContext, " ", -1,
GrContextDpyWidthGet(&sContext) / 2,
Row(6) + 4, true);
GrStringDrawCentered(&sContext, " ", -1,
GrContextDpyWidthGet(&sContext) / 2,
Row(7) + 4, true);
GrStringDrawCentered(&sContext, "Release the", -1,
GrContextDpyWidthGet(&sContext) / 2,
Row(5) + 4, true);
GrStringDrawCentered(&sContext, "button.", -1,
GrContextDpyWidthGet(&sContext) / 2,
Row(6) + 4, true);
GrStringDrawCentered(&sContext, " ", -1,
GrContextDpyWidthGet(&sContext) / 2,
Row(7) + 4, true);
//
// Wait for user to release the button.
//
while(bSelectPressed)
{
}
//
// If hibernation count is very large, it may be that there was already
// a value in the hibernate memory, so reset the count.
//
ui32HibernateCount = (ui32HibernateCount > 10000) ? 0 : ui32HibernateCount;
//
// Increment the hibernation count, and store it in the battery backed
// memory.
//
ui32HibernateCount++;
HibernateDataSet(&ui32HibernateCount, 1);
//
// Clear and enable the RTC and set the match registers to 5 seconds in the
// future. Set both to same, though they could be set differently, the
// first to match will cause a wake.
//
HibernateRTCSet(0);
HibernateRTCEnable();
HibernateRTCMatchSet(0, 5);
//
// Set wake condition on pin or RTC match. Board will wake when 5 seconds
// elapses, or when the button is pressed.
//
HibernateWakeSet(HIBERNATE_WAKE_PIN | HIBERNATE_WAKE_RTC);
//
// Request hibernation.
//
HibernateRequest();
//
// Give it time to activate, it should never get past this wait.
//
SysTickWait(100);
//
// Should not have got here, something is wrong. Print an error message to
// the user.
//
sRect.i16XMin = 0;
sRect.i16XMax = 95;
sRect.i16YMin = 0;
sRect.i16YMax = 63;
GrContextForegroundSet(&sContext, ClrBlack);
GrRectFill(&sContext, &sRect);
GrContextForegroundSet(&sContext, ClrWhite);
ui32Idx = 0;
while(g_pcErrorText[ui32Idx])
{
GrStringDraw(&sContext, g_pcErrorText[ui32Idx], -1, Col(0),
Row(ui32Idx), true);
ui32Idx++;
}
//
// Wait for the user to press the button, then restart the app.
//
bSelectPressed = 0;
while(!bSelectPressed)
{
}
//
// Reset the processor.
//
ROM_SysCtlReset();
//
// Finished.
//
while(1)
{
}
}
//*****************************************************************************
//
// This function is called to start an acquisition running. It determines
// which channels are to be logged, enables the ADC sequencers, and computes
// the first RTC match value. This will start the acquisition running.
//
//*****************************************************************************
void
AcquireStart(tConfigState *psConfig)
{
uint32_t ui32Idx, pui32RTC[2], ui32SelectedMask;
//
// Check the parameters
//
ASSERT(psConfig);
if(!psConfig)
{
return;
}
//
// Update the config state pointer, save the selected item mask
//
g_psConfigState = psConfig;
ui32SelectedMask = psConfig->ui16SelectedMask;
//
// Get the logging period from the logger configuration. Split the
// period into seconds and subseconds pieces and save for later use in
// generating RTC match values.
//
g_pui32MatchPeriod[0] = psConfig->ui32Period >> 8;
g_pui32MatchPeriod[1] = (psConfig->ui32Period & 0xFF) << 8;
//
// Determine how many channels are to be logged
//
ui32Idx = ui32SelectedMask;
g_ui32NumItems = 0;
while(ui32Idx)
{
if(ui32Idx & 1)
{
g_ui32NumItems++;
}
ui32Idx >>= 1;
}
//
// Initialize the strip chart manager for a new run. Don't bother with
// the strip chart if we are using viewer mode, or sleep-logging.
//
if((psConfig->ui8Storage != CONFIG_STORAGE_VIEWER) &&
!psConfig->ui32SleepLogging)
{
StripChartMgrInit();
StripChartMgrConfigure(ui32SelectedMask);
}
//
// Configure USB for memory stick if USB storage is chosen
//
if(psConfig->ui8Storage == CONFIG_STORAGE_USB)
{
USBStickOpenLogFile(0);
}
else if(psConfig->ui8Storage == CONFIG_STORAGE_FLASH)
{
//
// Flash storage is to be used, prepare the flash storage module.
// If already sleep-logging, then pass in the saved flash address
// so it does not need to be searched.
//
if(psConfig->ui32SleepLogging)
{
FlashStoreOpenLogFile(psConfig->ui32FlashStore);
}
else
{
//
// Otherwise not sleep logging, so just initialize the flash store,
// this will cause it to search for the starting storage address.
//
FlashStoreOpenLogFile(0);
}
}
//
// Enable the ADC sequencers
//
MAP_ADCSequenceEnable(ADC0_BASE, 0);
MAP_ADCSequenceEnable(ADC1_BASE, 0);
//
// Flush the ADC sequencers to be sure there is no lingering data.
//
MAP_ADCSequenceDataGet(ADC0_BASE, 0, g_pui32ADCData);
MAP_ADCSequenceDataGet(ADC1_BASE, 0, g_pui32ADCData);
//
// Enable ADC interrupts
//
MAP_ADCIntClear(ADC0_BASE, 0);
MAP_ADCIntClear(ADC1_BASE, 0);
MAP_ADCIntEnable(ADC0_BASE, 0);
MAP_IntEnable(INT_ADC0SS0);
//
// If we are not already sleep-logging, then initialize the RTC match.
// If we are sleep logging then this does not need to be set up.
//
if(!psConfig->ui32SleepLogging)
{
//
// Get the current RTC value
//
do
{
pui32RTC[0] = HibernateRTCGet();
pui32RTC[1] = HibernateRTCSSGet();
}
while(pui32RTC[0] != HibernateRTCGet());
//
// Set an initial next match value. Start with the subseconds always
// 0 so the first match value will always be an even multiple of the
// subsecond match. Add 2 seconds to the current RTC just to be clear
// of an imminent rollover. This means that the first match will occur
// between 1 and 2 seconds from now.
//
g_pui32NextMatch[0] = pui32RTC[0] + 2;
g_pui32NextMatch[1] = 0;
//
// Now set the match value
//
HibernateRTCMatchSet(0, g_pui32NextMatch[0]);
HibernateRTCSSMatchSet(0, g_pui32NextMatch[1]);
}
//
// If we are configured to sleep, but not sleeping yet, then enter sleep
// logging mode if allowed.
//
if(psConfig->bSleep && !psConfig->ui32SleepLogging)
{
//
// Allow sleep logging if storing to flash at a period of 1 second
// or greater.
//
if((psConfig->ui8Storage == CONFIG_STORAGE_FLASH) &&
(psConfig->ui32Period >= 0x100))
{
psConfig->ui32SleepLogging = 1;
}
}
//
// Enable the RTC interrupts from the hibernate module
//
HibernateIntClear(HibernateIntStatus(0));
HibernateIntEnable(HIBERNATE_INT_RTC_MATCH_0 | HIBERNATE_INT_PIN_WAKE);
MAP_IntEnable(INT_HIBERNATE);
//
// Logging data should now start running
//
}
//*****************************************************************************
//
// This is the handler for the RTC interrupt from the hibernate peripheral.
// It occurs on RTC match. This handler will initiate an ADC acquisition,
// which will run all of the ADC sequencers. Then it computes the next
// match value and sets it in the RTC.
//
//*****************************************************************************
void
RTCHandler(void)
{
uint32_t ui32Status, ui32Seconds;
//
// Increment RTC interrupt counter
//
g_pui32RTCInts++;
//
// Clear the RTC interrupts (this can be slow for hib module)
//
ui32Status = HibernateIntStatus(1);
HibernateIntClear(ui32Status);
//
// Read and save the current value of the seconds counter.
//
ui32Seconds = HibernateRTCGet();
//
// If we are sleep logging, then there will be no remembered value for
// the next match value, which is also used as the time stamp when
// data is collected. In this case we will just use the current
// RTC seconds. This is safe because if sleep-logging is used, it
// is only with periods of whole seconds, 1 second or longer.
//
if(g_psConfigState->ui32SleepLogging)
{
g_pui32NextMatch[0] = ui32Seconds;
g_pui32NextMatch[1] = 0;
}
//
// If we are logging data to PC and using a period greater than one
// second, then use special handling. For PC logging, if no data is
// collected, then we must send a keep-alive packet once per second.
//
if((g_psConfigState->ui8Storage == CONFIG_STORAGE_HOSTPC) &&
(g_pui32MatchPeriod[0] > 1))
{
//
// If the current seconds count is less than the match value, that
// means we got the interrupt due to one-second keep alive for the
// host PC.
//
if(ui32Seconds < g_pui32NextMatch[0])
{
//
// Set the next match for one second ahead (next keep-alive)
//
HibernateRTCMatchSet(0, ui32Seconds + 1);
//
// Set flag to indicate that a keep alive packet is needed
//
g_bNeedKeepAlive = true;
//
// Nothing else to do except wait for next keep alive or match
//
return;
}
//
// Else, this is a real match so proceed to below to do a normal
// acquisition.
//
}
//
// Kick off the next ADC acquisition. When these are done they will
// cause an ADC interrupt.
//
MAP_ADCProcessorTrigger(ADC1_BASE, 0);
MAP_ADCProcessorTrigger(ADC0_BASE, 0);
//
// Set the next RTC match. Add the match period to the previous match
// value. We are making an assumption here that there is enough time from
// when the match interrupt occurred, to this point in the code, that we
// are still setting the match time in the future. If the period is too
// long, then we could miss a match and never get another RTC interrupt.
//
g_pui32NextMatch[0] += g_pui32MatchPeriod[0];
g_pui32NextMatch[1] += g_pui32MatchPeriod[1];
if(g_pui32NextMatch[1] > 32767)
{
//
// Handle subseconds rollover
//
g_pui32NextMatch[1] &= 32767;
g_pui32NextMatch[0]++;
}
//
// If logging to host PC at greater than 1 second period, then set the
// next RTC wakeup for 1 second from now. This will cause a keep alive
// packet to be sent to the PC
//
if((g_psConfigState->ui8Storage == CONFIG_STORAGE_HOSTPC) &&
(g_pui32MatchPeriod[0] > 1))
{
HibernateRTCMatchSet(0, ui32Seconds + 1);
}
else
{
//
// Otherwise this is a normal match and the next match should also be a
// normal match, so set the next wakeup to the calculated match time.
//
HibernateRTCMatchSet(0, g_pui32NextMatch[0]);
HibernateRTCSSMatchSet(0, g_pui32NextMatch[1]);
}
//
// Toggle the LED on the board so the user can see that the acquisition
// is running.
//
MAP_GPIOPinWrite(GPIO_PORTG_BASE, GPIO_PIN_2,
~MAP_GPIOPinRead(GPIO_PORTG_BASE, GPIO_PIN_2));
//
// Now exit the int handler. The ADC will trigger an interrupt when
// it is finished, and the RTC is set up for the next match.
//
}
