/**
* initialize rtc module
**/
void rtc_init(void)
{
// Hibernate RTC Trim according to:
// http://e2e.ti.com/support/microcontrollers/tiva_arm/f/908/p/259103/907463
// otherwise it skips every 65th second
HibernateEnableExpClk(SysCtlClockGet());
HibernateClockConfig(HIBERNATE_OSC_LOWDRIVE);
SysCtlDelay(SysCtlClockGet()*3);
HibernateRTCTrimSet(0x7FFF);
HibernateRTCSet(0);
HibernateRTCEnable();
}
void init_RTC()
{
#ifdef USE_I2C_RTC
initI2C0();
#else
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_HIBERNATE);
HibernateEnableExpClk(ROM_SysCtlClockGet());
HibernateClockConfig(HIBERNATE_OSC_LOWDRIVE);
HibernateRTCEnable();
updateTime();
init_limits_rtc();
#endif
}
/*****************************************************
* Function: init_Hibernation
* Description: Initialize hibernation module
* Input: NONE
* Output: NONE
*****************************************************/
void init_Hibernation(void)
{
SysCtlPeripheralEnable(SYSCTL_PERIPH_HIBERNATE); // Enable hibernation module
HibernateEnableExpClk(SysCtlClockGet()); // Enable clocking to the hibernation module
HibernateClockConfig(HIBERNATE_OSC_LOWDRIVE); // Configure the clock source for hibernation module
HibernateGPIORetentionEnable(); // Retain GPIO state during hibernation
// HibernateRTCEnable(); // Enable the RTC
// HibernateRTCSet(0); // Clear the RTC time
//HibernateRTCMatchSet(0, HibernateRTCGet() + 5); // Set the match 0 register for 5 seconds from now
HibernateWakeSet(HIBERNATE_WAKE_PIN); // Configure to wake on button press or RTC match
// HIBERNATE_WAKE_PIN | HIBERNATE_WAKE_RTC
// Clear any pending status.
//
int status = HibernateIntStatus(0); // Clear any pending status
HibernateIntClear(status);
}
//*****************************************************************************
//
// 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
