//*****************************************************************************
//
// Initialize and operate the data logger.
//
//*****************************************************************************
int
main(void)
{
tContext sDisplayContext, sBufferContext;
uint32_t ui32HibIntStatus, ui32SysClock, ui32LastTickCount;
bool bSkipSplash;
uint8_t ui8ButtonState, ui8ButtonChanged;
uint_fast8_t ui8X, ui8Y;
//
// 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.
//
MAP_FPULazyStackingEnable();
//
// Set the clocking to run at 50 MHz.
//
MAP_SysCtlClockSet(SYSCTL_SYSDIV_4 | SYSCTL_USE_PLL | SYSCTL_XTAL_16MHZ |
SYSCTL_OSC_MAIN);
ui32SysClock = MAP_SysCtlClockGet();
//
// Initialize locals.
//
bSkipSplash = false;
ui32LastTickCount = 0;
//
// Initialize the data acquisition module. This initializes the ADC
// hardware.
//
AcquireInit();
//
// Enable access to the hibernate peripheral. If the hibernate peripheral
// was already running then this will have no effect.
//
MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_HIBERNATE);
//
// Check to see if the hiberate module is already active and if so then
// read the saved configuration state. If both are okay, then proceed
// to check and see if we are logging data using sleep mode.
//
if(HibernateIsActive() && !GetSavedState(&g_sConfigState))
{
//
// Read the status of the hibernate module.
//
ui32HibIntStatus = HibernateIntStatus(1);
//
// If this is a pin wake, that means the user pressed the select
// button and we should terminate the sleep logging. In this case
// we will fall out of this conditional section, and go through the
// normal startup below, but skipping the splash screen so the user
// gets immediate response.
//
if(ui32HibIntStatus & HIBERNATE_INT_PIN_WAKE)
{
//
// Clear the interrupt flag so it is not seen again until another
// wake.
//
HibernateIntClear(HIBERNATE_INT_PIN_WAKE);
bSkipSplash = true;
}
//
// Otherwise if we are waking from hibernate and it was not a pin
// wake, then it must be from RTC match. Check to see if we are
// sleep logging and if so then go through an abbreviated startup
// in order to collect the data and go back to sleep.
//
else if(g_sConfigState.ui32SleepLogging &&
(ui32HibIntStatus & HIBERNATE_INT_RTC_MATCH_0))
{
//
// Start logger and pass the configuration. The logger should
// configure itself to take one sample.
//
AcquireStart(&g_sConfigState);
g_iLoggerState = eSTATE_LOGGING;
//
// Enter a forever loop to run the acquisition. This will run
// until a new sample has been taken and stored.
//
while(!AcquireRun())
{
}
//
// Getting here means that a data acquisition was performed and we
// can now go back to sleep. Save the configuration and then
// activate the hibernate.
//
SetSavedState(&g_sConfigState);
//
// Set wake condition on pin-wake or RTC match. Then put the
// processor in hibernation.
//
HibernateWakeSet(HIBERNATE_WAKE_PIN | HIBERNATE_WAKE_RTC);
HibernateRequest();
//
// Hibernating takes a finite amount of time to occur, so wait
// here forever until hibernate activates and the processor
// power is removed.
//
for(;;)
{
}
}
//
// Otherwise, this was not a pin wake, and we were not sleep logging,
// so just fall out of this conditional and go through the normal
// startup below.
//
}
else
{
//
// In this case, either the hibernate module was not already active, or
// the saved configuration was not valid. Initialize the configuration
// to the default state and then go through the normal startup below.
//
GetDefaultState(&g_sConfigState);
}
//
// Enable the Hibernate module to run.
//
HibernateEnableExpClk(SysCtlClockGet());
//
// The hibernate peripheral trim register must be set per silicon
// erratum 2.1
//
HibernateRTCTrimSet(0x7FFF);
//
// Start the RTC running. If it was already running then this will have
// no effect.
//
HibernateRTCEnable();
//
// In case we were sleep logging and are now finished (due to user
// pressing select button), then disable sleep logging so it doesnt
// try to start up again.
//
g_sConfigState.ui32SleepLogging = 0;
SetSavedState(&g_sConfigState);
//
// Initialize the display driver.
//
CFAL96x64x16Init();
//
// Initialize the buttons driver.
//
ButtonsInit();
//
// Pass the restored state to the menu system.
//
MenuSetState(&g_sConfigState);
//
// Enable the USB peripheral
//
MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_USB0);
//
// Configure the required pins for USB operation.
//
MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOG);
MAP_GPIOPinConfigure(GPIO_PG4_USB0EPEN);
MAP_GPIOPinTypeUSBDigital(GPIO_PORTG_BASE, GPIO_PIN_4);
MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOL);
MAP_GPIOPinTypeUSBAnalog(GPIO_PORTL_BASE, GPIO_PIN_6 | GPIO_PIN_7);
MAP_GPIOPinTypeUSBAnalog(GPIO_PORTB_BASE, GPIO_PIN_0 | GPIO_PIN_1);
//
// Erratum workaround for silicon revision A1. VBUS must have pull-down.
//
if(CLASS_IS_BLIZZARD && REVISION_IS_A1)
{
HWREG(GPIO_PORTB_BASE + GPIO_O_PDR) |= GPIO_PIN_1;
}
//
// Initialize the USB stack mode and pass in a mode callback.
//
USBStackModeSet(0, eUSBModeOTG, ModeCallback);
//
// Initialize the stack to be used with USB stick.
//
USBStickInit();
//
// Initialize the stack to be used as a serial device.
//
USBSerialInit();
//
// Initialize the USB controller for dual mode operation with a 2ms polling
// rate.
//
USBOTGModeInit(0, 2000, g_pui8HCDPool, HCD_MEMORY_SIZE);
//
// Initialize the menus module. This module will control the user
// interface menuing system.
//
MenuInit(WidgetActivated);
//
// Configure SysTick to periodically interrupt.
//
g_ui32TickCount = 0;
MAP_SysTickPeriodSet(ui32SysClock / CLOCK_RATE);
MAP_SysTickIntEnable();
MAP_SysTickEnable();
//
// Initialize the display context and another context that is used
// as an offscreen drawing buffer for display animation effect
//
GrContextInit(&sDisplayContext, &g_sCFAL96x64x16);
GrContextInit(&sBufferContext, &g_sOffscreenDisplayA);
//
// Show the splash screen if we are not skipping it. The only reason to
// skip it is if the application was in sleep-logging mode and the user
// just waked it up with the select button.
//
if(!bSkipSplash)
{
const uint8_t *pui8SplashLogo = g_pui8Image_TI_Black;
//
// Draw the TI logo on the display. Use an animation effect where the
// logo will "slide" onto the screen. Allow select button to break
// out of animation.
//
for(ui8X = 0; ui8X < 96; ui8X++)
{
if(ButtonsPoll(0, 0) & SELECT_BUTTON)
{
break;
}
GrImageDraw(&sDisplayContext, pui8SplashLogo, 95 - ui8X, 0);
}
//
// Leave the logo on the screen for a long duration. Monitor the
// buttons so that if the user presses the select button, the logo
// display is terminated and the application starts immediately.
//
while(g_ui32TickCount < 400)
{
if(ButtonsPoll(0, 0) & SELECT_BUTTON)
{
break;
}
}
//
// Extended splash sequence
//
if(ButtonsPoll(0, 0) & UP_BUTTON)
{
for(ui8X = 0; ui8X < 96; ui8X += 4)
{
GrImageDraw(&sDisplayContext,
g_ppui8Image_Splash[(ui8X / 4) & 3],
(int32_t)ui8X - 96L, 0);
GrImageDraw(&sDisplayContext, pui8SplashLogo, ui8X, 0);
MAP_SysCtlDelay(ui32SysClock / 12);
}
MAP_SysCtlDelay(ui32SysClock / 3);
pui8SplashLogo = g_ppui8Image_Splash[4];
GrImageDraw(&sDisplayContext, pui8SplashLogo, 0, 0);
MAP_SysCtlDelay(ui32SysClock / 12);
}
//
// Draw the initial menu into the offscreen buffer.
//
SlideMenuDraw(&g_sMenuWidget, &sBufferContext, 0);
//
// Now, draw both the TI logo splash screen (from above) and the initial
// menu on the screen at the same time, moving the coordinates so that
// the logo "slides" off the display and the menu "slides" onto the
// display.
//
for(ui8Y = 0; ui8Y < 64; ui8Y++)
{
GrImageDraw(&sDisplayContext, pui8SplashLogo, 0, -ui8Y);
GrImageDraw(&sDisplayContext, g_pui8OffscreenBufA, 0, 63 - ui8Y);
}
}
//
// Add the menu widget to the widget tree and send an initial paint
// request.
//
WidgetAdd(WIDGET_ROOT, (tWidget *)&g_sMenuWidget);
WidgetPaint(WIDGET_ROOT);
//
// Set the focus handle to the menu widget. Any button events will be
// sent to this widget
//
g_ui32KeyFocusWidgetHandle = (uint32_t)&g_sMenuWidget;
//
// Forever loop to run the application
//
while(1)
{
//
// Each time the timer tick occurs, process any button events.
//
if(g_ui32TickCount != ui32LastTickCount)
{
//
// Remember last tick count
//
ui32LastTickCount = g_ui32TickCount;
//
// Read the debounced state of the buttons.
//
ui8ButtonState = ButtonsPoll(&ui8ButtonChanged, 0);
//
// Pass any button presses through to the widget message
// processing mechanism. The widget that has the button event
// focus (probably the menu widget) will catch these button events.
//
if(BUTTON_PRESSED(SELECT_BUTTON, ui8ButtonState, ui8ButtonChanged))
{
SendWidgetKeyMessage(WIDGET_MSG_KEY_SELECT);
}
if(BUTTON_PRESSED(UP_BUTTON, ui8ButtonState, ui8ButtonChanged))
{
SendWidgetKeyMessage(WIDGET_MSG_KEY_UP);
}
if(BUTTON_PRESSED(DOWN_BUTTON, ui8ButtonState, ui8ButtonChanged))
{
SendWidgetKeyMessage(WIDGET_MSG_KEY_DOWN);
}
if(BUTTON_PRESSED(LEFT_BUTTON, ui8ButtonState, ui8ButtonChanged))
{
SendWidgetKeyMessage(WIDGET_MSG_KEY_LEFT);
}
if(BUTTON_PRESSED(RIGHT_BUTTON, ui8ButtonState, ui8ButtonChanged))
{
SendWidgetKeyMessage(WIDGET_MSG_KEY_RIGHT);
}
}
//
// Tell the OTG library code how much time has passed in milliseconds
// since the last call.
//
USBOTGMain(GetTickms());
//
// Call functions as needed to keep the host or device mode running.
//
if(g_iCurrentUSBMode == eUSBModeDevice)
{
USBSerialRun();
}
else if(g_iCurrentUSBMode == eUSBModeHost)
{
USBStickRun();
}
//
// If in the logging state, then call the logger run function. This
// keeps the data acquisition running.
//
if((g_iLoggerState == eSTATE_LOGGING) ||
(g_iLoggerState == eSTATE_VIEWING))
{
if(AcquireRun() && g_sConfigState.ui32SleepLogging)
{
//
// If sleep logging is enabled, then at this point we have
// stored the first data item, now save the state and start
// hibernation. Wait for the power to be cut.
//
SetSavedState(&g_sConfigState);
HibernateWakeSet(HIBERNATE_WAKE_PIN | HIBERNATE_WAKE_RTC);
HibernateRequest();
for(;;)
{
}
}
//
// If viewing instead of logging then request a repaint to keep
// the viewing window updated.
//
if(g_iLoggerState == eSTATE_VIEWING)
{
WidgetPaint(WIDGET_ROOT);
}
}
//
// If in the saving state, then save data from flash storage to
// USB stick.
//
if(g_iLoggerState == eSTATE_SAVING)
{
//
// Save data from flash to USB
//
FlashStoreSave();
//
// Return to idle state
//
g_iLoggerState = eSTATE_IDLE;
}
//
// If in the erasing state, then erase the data stored in flash.
//
if(g_iLoggerState == eSTATE_ERASING)
{
//
// Save data from flash to USB
//
FlashStoreErase();
//
// Return to idle state
//
g_iLoggerState = eSTATE_IDLE;
}
//
// If in the flash reporting state, then show the report of the amount
// of used and free flash memory.
//
if(g_iLoggerState == eSTATE_FREEFLASH)
{
//
// Report free flash space
//
FlashStoreReport();
//
// Return to idle state
//
g_iLoggerState = eSTATE_IDLE;
}
//
// If we are exiting the clock setting widget, that means that control
// needs to be given back to the menu system.
//
if(g_iLoggerState == eSTATE_CLOCKEXIT)
{
//
// Give the button event focus back to the menu system
//
g_ui32KeyFocusWidgetHandle = (uint32_t)&g_sMenuWidget;
//
// Send a button event to the menu widget that means the left
// key was pressed. This signals the menu widget to deactivate
// the current child widget (which was the clock setting wigdet).
// This will cause the menu widget to slide the clock set widget
// off the screen and resume control of the display.
//
SendWidgetKeyMessage(WIDGET_MSG_KEY_LEFT);
g_iLoggerState = eSTATE_IDLE;
}
//
// Process any new messages that are in the widget queue. This keeps
// the user interface running.
//
WidgetMessageQueueProcess();
}
}
//*****************************************************************************
//
// Main function performs init and manages system.
//
// Called automatically after the system and compiler pre-init sequences.
// Performs system init calls, restores state from hibernate if needed and
// then manages the application context duties of the system.
//
//*****************************************************************************
int
main(void)
{
uint32_t ui32Status;
uint32_t ui32ResetCause;
int32_t i32CommandStatus;
//
// Enable stacking for interrupt handlers. This allows floating-point
// instructions to be used within interrupt handlers, but at the expense of
// extra stack usage.
//
ROM_FPUEnable();
ROM_FPUStackingEnable();
//
// Set the system clock to run at 40Mhz off PLL with external crystal as
// reference.
//
ROM_SysCtlClockSet(SYSCTL_SYSDIV_5 | SYSCTL_USE_PLL | SYSCTL_XTAL_16MHZ |
SYSCTL_OSC_MAIN);
//
// Enable the hibernate module
//
SysCtlPeripheralEnable(SYSCTL_PERIPH_HIBERNATE);
//
// Enable and Initialize the UART.
//
ConfigureUART();
UARTprintf("Welcome to the Tiva C Series TM4C123G LaunchPad!\n");
UARTprintf("Type 'help' for a list of commands\n");
UARTprintf("> ");
//
// Determine why system reset occurred and respond accordingly.
//
ui32ResetCause = SysCtlResetCauseGet();
SysCtlResetCauseClear(ui32ResetCause);
if(ui32ResetCause == SYSCTL_CAUSE_POR)
{
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)
{
UARTprintf("Hibernate Wake Pin Wake Event\n");
UARTprintf("> ");
//
// Recover the application state variables from battery backed
// hibernate memory. Set ui32Mode to normal.
//
HibernateDataGet((uint32_t*) &g_sAppState,
sizeof(tAppState) / 4 + 1);
g_sAppState.ui32Mode = APP_MODE_NORMAL;
}
//
// Wake was due to RTC match
//
else if(ui32Status & HIBERNATE_INT_RTC_MATCH_0)
{
UARTprintf("Hibernate RTC Wake Event\n");
UARTprintf("> ");
//
// Recover the application state variables from battery backed
// hibernate memory. Set ui32Mode to briefly flash the RGB.
//
HibernateDataGet((uint32_t*) &g_sAppState,
sizeof(tAppState) / 4 + 1);
g_sAppState.ui32Mode = APP_MODE_HIB_FLASH;
}
}
else
{
//
// Reset was do to a cold first time power up.
//
UARTprintf("Power on reset. Hibernate not active.\n");
UARTprintf("> ");
g_sAppState.ui32Mode = APP_MODE_NORMAL;
g_sAppState.fColorWheelPos = 0;
g_sAppState.fIntensity = APP_INTENSITY_DEFAULT;
g_sAppState.ui32Buttons = 0;
}
}
else
{
//
// External Pin reset or other reset event occured.
//
UARTprintf("External or other reset\n");
UARTprintf("> ");
//
// Treat this as a cold power up reset without restore from hibernate.
//
g_sAppState.ui32Mode = APP_MODE_NORMAL;
g_sAppState.fColorWheelPos = APP_PI;
g_sAppState.fIntensity = APP_INTENSITY_DEFAULT;
g_sAppState.ui32Buttons = 0;
//
// colors get a default initialization later when we call AppRainbow.
//
}
//
// Initialize clocking for the Hibernate module
//
HibernateEnableExpClk(SysCtlClockGet());
//
// Initialize the RGB LED. AppRainbow typically only called from interrupt
// context. Safe to call here to force initial color update because
// interrupts are not yet enabled.
//
RGBInit(0);
RGBIntensitySet(g_sAppState.fIntensity);
AppRainbow(1);
RGBEnable();
//
// Initialize the buttons
//
ButtonsInit();
//
// Initialize the SysTick interrupt to process colors and buttons.
//
SysTickPeriodSet(SysCtlClockGet() / APP_SYSTICKS_PER_SEC);
SysTickEnable();
SysTickIntEnable();
IntMasterEnable();
//
// spin forever and wait for carriage returns or state changes.
//
while(1)
{
UARTprintf("\n>");
//
// Peek to see if a full command is ready for processing
//
while(UARTPeek('\r') == -1)
{
//
// millisecond delay. A SysCtlSleep() here would also be OK.
//
SysCtlDelay(SysCtlClockGet() / (1000 / 3));
//
// Check for change of mode and enter hibernate if requested.
// all other mode changes handled in interrupt context.
//
if(g_sAppState.ui32Mode == APP_MODE_HIB)
{
AppHibernateEnter();
}
}
//
// a '\r' was detected get the line of text from the user.
//
UARTgets(g_cInput,sizeof(g_cInput));
//
// Pass the line from the user to the command processor.
// It will be parsed and valid commands executed.
//
i32CommandStatus = CmdLineProcess(g_cInput);
//
// Handle the case of bad command.
//
if(i32CommandStatus == CMDLINE_BAD_CMD)
{
UARTprintf("Bad command!\n");
}
//
// Handle the case of too many arguments.
//
else if(i32CommandStatus == CMDLINE_TOO_MANY_ARGS)
{
UARTprintf("Too many arguments for command processor!\n");
}
}
}
//*****************************************************************************
//
// 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)
{
}
}
int main(void) {
// Status of Hibernation module
uint32_t ui32Status = 0;
// Length of time to hibernate
uint32_t hibernationTime = 600;
g_ui32SysClock = SysCtlClockFreqSet((SYSCTL_XTAL_25MHZ |
SYSCTL_OSC_MAIN | SYSCTL_USE_PLL |
SYSCTL_CFG_VCO_480), 120000000);
//*************************************************************************
//! I/O config and setup
//*************************************************************************
SysCtlPeripheralEnable(SYSCTL_PERIPH_UART0); // UART
SysCtlPeripheralEnable(SYSCTL_PERIPH_UART7); // UART
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA); // UART0
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOC); // UART7
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD); // SSI
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPION); // GPIO
SysCtlPeripheralEnable(SYSCTL_PERIPH_SSI2); // SSI
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOK); // GPIO
SysCtlPeripheralEnable(SYSCTL_PERIPH_HIBERNATE);// Hibernation
// UART0 and UART7
GPIOPinConfigure(GPIO_PA0_U0RX);
GPIOPinConfigure(GPIO_PC4_U7RX);
GPIOPinConfigure(GPIO_PA1_U0TX);
GPIOPinConfigure(GPIO_PC5_U7TX);
GPIOPinTypeUART(GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_1);
GPIOPinTypeUART(GPIO_PORTC_BASE, GPIO_PIN_4 | GPIO_PIN_5);
// LED indicators
GPIOPinTypeGPIOOutput(GPIO_PORTN_BASE, GPIO_PIN_0 | GPIO_PIN_1);
//
// SD Card Detect (PK3) and GPS Pulse Per Second (PK2)
//
GPIOPinTypeGPIOInput(GPIO_PORTK_BASE, GPIO_PIN_2|GPIO_PIN_3);
// Pulse Per Second input pin config as weak pull-down
GPIOPadConfigSet(GPIO_PORTK_BASE,GPIO_PIN_2,GPIO_STRENGTH_2MA,GPIO_PIN_TYPE_STD_WPD);
// Pulse Per Second input pin config as rising edge triggered interrupt
GPIOIntTypeSet(GPIO_PORTK_BASE,GPIO_PIN_2,GPIO_RISING_EDGE);
// Register Port K as interrupt
GPIOIntRegister(GPIO_PORTK_BASE, PortKIntHandler);
// Enable Port K pin 2 interrupt
GPIOIntEnable(GPIO_PORTK_BASE, GPIO_INT_PIN_2);
//
// Disable PPS pin interrupt by default
//
if(IntIsEnabled(INT_GPIOK)) {
IntDisable(INT_GPIOK);
}
GPIOPinConfigure(GPIO_PD0_SSI2XDAT1);
GPIOPinConfigure(GPIO_PD1_SSI2XDAT0);
GPIOPinConfigure(GPIO_PD2_SSI2FSS);
GPIOPinConfigure(GPIO_PD3_SSI2CLK);
// SD Card Detect (CD) - weak pull-up input
GPIOPadConfigSet(GPIO_PORTK_BASE, GPIO_PIN_3, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_STD_WPU);
// Debug UART output config
UARTConfigSetExpClk(UART0_BASE, g_ui32SysClock, 115200,
(UART_CONFIG_WLEN_8 | UART_CONFIG_STOP_ONE | UART_CONFIG_PAR_NONE));
// GPS UART input config
UARTConfigSetExpClk(UART7_BASE, g_ui32SysClock, 9600,
(UART_CONFIG_WLEN_8 | UART_CONFIG_STOP_ONE | UART_CONFIG_PAR_NONE));
//
// Configure SysTick for a 100Hz interrupt.
//
SysTickPeriodSet(g_ui32SysClock / 100);
SysTickIntEnable();
SysTickEnable();
//
// Floating point enable
//
FPUEnable();
FPULazyStackingEnable();
//
// Clear user LEDs
//
GPIOPinWrite(GPIO_PORTN_BASE, GPIO_PIN_0 | GPIO_PIN_1, 0x00);
//*************************************************************************
//! Hibernation mode checks and setup
//*************************************************************************
//
// 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. Clear the wake
// source so that the device can be put into hibernation again.
//
ui32Status = HibernateIntStatus(0);
HibernateIntClear(ui32Status);
//
// Wake was due to RTC match.
//
if(ui32Status & HIBERNATE_INT_RTC_MATCH_0) {
//
// TODO: add IMU check
//
}
//
// Wake was due to the External Wake pin.
//
else if(ui32Status & HIBERNATE_INT_PIN_WAKE) {
//
// Switch off low power mode
//
lowPowerOn = 0;
}
}
//
// Configure Hibernate module clock.
//
HibernateEnableExpClk(g_ui32SysClock);
//
// If the wake was not due to the above sources, then it was a system
// reset.
//
if(!(ui32Status & (HIBERNATE_INT_PIN_WAKE | HIBERNATE_INT_RTC_MATCH_0))) {
//
// Configure the module clock source.
//
HibernateClockConfig(HIBERNATE_OSC_LOWDRIVE);
}
//
// Enable PPS for a single data log. Interrupt on next PPS logic high.
//
ppsDataLog();
//
// Enable RTC mode.
//
HibernateRTCEnable();
//
// Loop forever
//
while(1) {
//
// If low power mode is set (default), hibernate again
// If not, spin in nested while(1) for faster updates from PPS pin ints.
//
if(lowPowerOn) {
lowPowerMode(hibernationTime);
}
else {
if(!IntIsEnabled(INT_GPIOK)) {
IntEnable(INT_GPIOK);
}
while(1) {
}
}
}
} // End function main