//*****************************************************************************
//
//! Starts playback of a block of PCM audio samples.
//!
//! \param pvData is a pointer to the audio data to play.
//! \param ulLength is the length of the data in bytes.
//! \param pfnCallback is a function to call when this buffer has be played.
//!
//! This function starts the playback of a block of PCM audio samples. If
//! playback of another buffer is currently ongoing, its playback is cancelled
//! and the buffer starts playing immediately.
//!
//! \return 0 if the buffer was accepted, returns non-zero if there was no
//! space available for this buffer.
//
//*****************************************************************************
unsigned long
SoundBufferPlay(const void *pvData, unsigned long ulLength,
tBufferCallback pfnCallback)
{
unsigned long ulChannel;
unsigned long ulDMASetting;
//
// Must disable I2S interrupts during this time to prevent state problems.
//
ROM_IntDisable(INT_I2S0);
//
// Save the buffer information.
//
g_sBuffers[g_ulPlaying].pulData = (const unsigned long *)pvData;
g_sBuffers[g_ulPlaying].ulSize = ulLength;
g_sBuffers[g_ulPlaying].pfnBufferCallback = pfnCallback;
//
// Configure the I2S TX DMA channel.
// Program it to only use burst transfer. The arb size is 8 to
// match the FIFO trigger level (set above).
// The transfer size is 32 bits, from the TX buffer to the
// TX FIFO.
//
ROM_uDMAChannelAttributeEnable(UDMA_CHANNEL_I2S0TX,
(UDMA_ATTR_USEBURST |
UDMA_ATTR_HIGH_PRIORITY));
if(g_ulPlaying)
{
ulChannel = UDMA_CHANNEL_I2S0TX | UDMA_ALT_SELECT;
}
else
{
ulChannel = UDMA_CHANNEL_I2S0TX | UDMA_PRI_SELECT;
}
if(g_usChannels == 1)
{
if(g_usBitsPerSample == 8)
{
ulDMASetting = UDMA_SIZE_8 | UDMA_SRC_INC_8 |
UDMA_DST_INC_NONE | UDMA_ARB_4;
}
else
{
ulDMASetting = UDMA_SIZE_16 | UDMA_SRC_INC_16 |
UDMA_DST_INC_NONE | UDMA_ARB_4;
//
// Modify the DMA transfer is 16 bits.
//
g_sBuffers[g_ulPlaying].ulSize >>= 1;
}
}
else
{
if(g_usBitsPerSample == 8)
void
HardwareSerial::primeTransmit(unsigned long ulBase)
{
//
// Do we have any data to transmit?
//
if(!TX_BUFFER_EMPTY)
{
//
// Disable the UART interrupt. If we don't do this there is a race
// condition which can cause the read index to be corrupted.
//
ROM_IntDisable(g_ulUARTInt[uartModule]);
//
// Yes - take some characters out of the transmit buffer and feed
// them to the UART transmit FIFO.
//
while(!TX_BUFFER_EMPTY)
{
while(ROM_UARTSpaceAvail(ulBase) && !TX_BUFFER_EMPTY) {
ROM_UARTCharPutNonBlocking(ulBase,
txBuffer[txReadIndex]);
txReadIndex = (txReadIndex + 1) % SERIAL_BUFFER_SIZE;
}
}
//
// Reenable the UART interrupt.
//
ROM_IntEnable(g_ulUARTInt[uartModule]);
}
}
//---- INT Handlers ----//
void Timer0BIntHandler(void)
{
//
// Clear the timer interrupt flag.
//
ROM_TimerIntClear(TIMER0_BASE, TIMER_TIMB_TIMEOUT);
//
// Update the periodic interrupt counter.
//
g_ui32Counter++;
//
// Once NUMBER_OF_INTS interrupts have been received, turn off the
// TIMER0B interrupt.
//
if(g_ui32Counter == NUMBER_OF_INTS)
{
//
// Disable the Timer0B interrupt.
//
ROM_IntDisable(INT_TIMER0B);
//
// Turn off Timer0B interrupt.
//
ROM_TimerIntDisable(TIMER0_BASE, TIMER_TIMB_TIMEOUT);
//
// Clear any pending interrupt flag.
//
ROM_TimerIntClear(TIMER0_BASE, TIMER_TIMB_TIMEOUT);
}
}
void
AcquireStop(void)
{
tLogRecord pRecord;
//pRecord.usItemMask = (unsigned short)15;
//pRecord.sItems[0]=rcount;
//pRecord.sItems[1]=rcount;
//pRecord.sItems[2]=rcount;
//pRecord.sItems[3]=rcount;
//USBStickWriteRecord(&pRecord);
//USBStickWriteRecord(&pRecord);
// Disable ADC interrupts
//
ROM_IntDisable(INT_ADC0SS2);
ROM_ADCSequenceDisable(ADC0_BASE, SEQUENCER);
ROM_TimerDisable(TIMER0_BASE,TIMER_A);
//ROM_IntMasterDisable();
// ROM_IntDisable(INT_TIMER1A);
// ROM_TimerIntDisable(TIMER1_BASE, TIMER_TIMA_TIMEOUT);
// ROM_TimerDisable(TIMER1_BASE, TIMER_A);
//USBStickCloseFile();
}
//*****************************************************************************
//
//! Stops playback of the current sound stream.
//!
//! This function immediately stops playback of the current sound stream. As
//! a result, the output is changed directly to the mid-point, possibly
//! resulting in a pop or click. It is then ramped down to no output,
//! eliminating the current draw through the amplifier and speaker.
//!
//! \return None.
//
//*****************************************************************************
void
SoundStop(void)
{
//
// See if playback is in progress.
//
if((g_sSoundState.ui32Flags != 0) &&
(HWREGBITW(&g_sSoundState.ui32Flags, SOUND_FLAG_SHUTDOWN) == 0))
{
//
// Temporarily disable the timer interrupt.
//
ROM_IntDisable(INT_TIMER5A);
//
// Clear the sound flags and set the shutdown flag (to try to avoid a
// pop, though one may still occur based on the current position of the
// output waveform).
//
g_sSoundState.ui32Flags = 0;
HWREGBITW(&g_sSoundState.ui32Flags, SOUND_FLAG_SHUTDOWN) = 1;
//
// Set the shutdown step to the first.
//
g_sSoundState.i32Step = g_sSoundState.ui32Period / 2;
//
// Reenable the timer interrupt.
//
ROM_IntEnable(INT_TIMER5A);
}
}
void stop_Timer0B(void)
{
ROM_IntDisable(INT_TIMER0B);
ROM_TimerIntDisable(TIMER0_BASE, TIMER_TIMB_TIMEOUT);
ROM_TimerIntClear(TIMER0_BASE, TIMER_TIMB_TIMEOUT);
}
void
HardwareSerial::setModule(unsigned long module)
{
ROM_UARTIntDisable(UART_BASE, UART_INT_RX | UART_INT_RT);
ROM_IntDisable(g_ulUARTInt[uartModule]);
uartModule = module;
begin(baudRate);
}
char stop()
{
ROM_IntMasterDisable();
ROM_IntDisable(INT_TIMER0A);
ROM_TimerIntClear(TIMER0_BASE, TIMER_TIMA_TIMEOUT);
ROM_TimerIntDisable(TIMER0_BASE, TIMER_TIMA_TIMEOUT);
ROM_TimerDisable(TIMER0_BASE, TIMER_A);
ROM_GPIOPinIntClear(GPIO_PORTB_BASE, 0xff);
ROM_GPIOPinIntDisable(GPIO_PORTB_BASE, 0xff);
ROM_IntDisable(INT_GPIOB);
ROM_IntPendClear(INT_TIMER0A);
ROM_IntPendClear(INT_GPIOB);
sampling = SAMPLING_OFF;
tick = 0;
led(0,1,0);
return STATE_GET_COMMAND;
}
/*
Set up I2C pins and clock slow/fast
rate400 true = 400KHz, false 100KHz
*/
void MasterI2C0Disable(int rate400)
{
//
// Enable the I2C interrupt.
//
ROM_IntDisable(INT_I2C0); // already done via I2CIntRegister
//
// Enable the I2C master interrupt.
//
ROM_I2CMasterIntDisable(I2C0_MASTER_BASE);
}
void HardwareSerial::end()
{
unsigned long ulInt = ROM_IntMasterDisable();
flushAll();
//
// If interrupts were enabled when we turned them off, turn them
// back on again.
//
if(!ulInt)
{
ROM_IntMasterEnable();
}
ROM_IntDisable(g_ulUARTInt[uartModule]);
ROM_UARTIntDisable(UART_BASE, UART_INT_RX | UART_INT_RT);
}
//*****************************************************************************
//
// This is the main example program. It checks to see that the interrupts are
// processed in the correct order when they have identical priorities,
// increasing priorities, and decreasing priorities. This exercises interrupt
// preemption and tail chaining.
//
//*****************************************************************************
int
main(void)
{
uint_fast8_t ui8Error;
uint32_t ui32SysClock;
//
// Run from the PLL at 120 MHz.
//
ui32SysClock = MAP_SysCtlClockFreqSet((SYSCTL_XTAL_25MHZ |
SYSCTL_OSC_MAIN | SYSCTL_USE_PLL |
SYSCTL_CFG_VCO_480), 120000000);
//
// Configure the device pins.
//
PinoutSet();
//
// Initialize the display driver.
//
Kentec320x240x16_SSD2119Init(ui32SysClock);
//
// Initialize the graphics context.
//
GrContextInit(&g_sContext, &g_sKentec320x240x16_SSD2119);
//
// Draw the application frame.
//
FrameDraw(&g_sContext, "interrupts");
//
// Put the status header text on the display.
//
GrContextFontSet(&g_sContext, g_psFontCm20);
GrStringDrawCentered(&g_sContext, "Active: Pending: ", -1,
GrContextDpyWidthGet(&g_sContext) / 2, 150, 0);
//
// Configure the B3, L1 and L0 to be outputs to indicate entry/exit of one
// of the interrupt handlers.
//
GPIOPinTypeGPIOOutput(GPIO_A_BASE, GPIO_A_PIN);
GPIOPinTypeGPIOOutput(GPIO_B_BASE, GPIO_B_PIN);
GPIOPinTypeGPIOOutput(GPIO_C_BASE, GPIO_C_PIN);
GPIOPinWrite(GPIO_A_BASE, GPIO_A_PIN, 0);
GPIOPinWrite(GPIO_B_BASE, GPIO_B_PIN, 0);
GPIOPinWrite(GPIO_C_BASE, GPIO_C_PIN, 0);
//
// Set up and enable the SysTick timer. It will be used as a reference
// for delay loops in the interrupt handlers. The SysTick timer period
// will be set up for 100 times per second.
//
ROM_SysTickPeriodSet(ui32SysClock / 100);
ROM_SysTickEnable();
//
// Reset the error indicator.
//
ui8Error = 0;
//
// Enable interrupts to the processor.
//
ROM_IntMasterEnable();
//
// Enable the interrupts.
//
ROM_IntEnable(INT_GPIOA);
ROM_IntEnable(INT_GPIOB);
ROM_IntEnable(INT_GPIOC);
//
// Indicate that the equal interrupt priority test is beginning.
//
GrStringDrawCentered(&g_sContext, "Equal Priority", -1,
GrContextDpyWidthGet(&g_sContext) / 2, 60, 1);
//
// Set the interrupt priorities so they are all equal.
//
ROM_IntPrioritySet(INT_GPIOA, 0x00);
ROM_IntPrioritySet(INT_GPIOB, 0x00);
ROM_IntPrioritySet(INT_GPIOC, 0x00);
//
// Reset the interrupt flags.
//
g_ui32GPIOa = 0;
g_ui32GPIOb = 0;
g_ui32GPIOc = 0;
g_ui32Index = 1;
//
// Trigger the interrupt for GPIO C.
//
HWREG(NVIC_SW_TRIG) = INT_GPIOC - 16;
//
// Put the current interrupt state on the LCD.
//
DisplayIntStatus();
//
// Verify that the interrupts were processed in the correct order.
//
if((g_ui32GPIOa != 3) || (g_ui32GPIOb != 2) || (g_ui32GPIOc != 1))
{
ui8Error |= 1;
}
//
// Wait two seconds.
//
Delay(2);
//
// Indicate that the decreasing interrupt priority test is beginning.
//
GrStringDrawCentered(&g_sContext, " Decreasing Priority ", -1,
GrContextDpyWidthGet(&g_sContext) / 2, 60, 1);
//
// Set the interrupt priorities so that they are decreasing (i.e. C > B >
// A).
//
ROM_IntPrioritySet(INT_GPIOA, 0x80);
ROM_IntPrioritySet(INT_GPIOB, 0x40);
ROM_IntPrioritySet(INT_GPIOC, 0x00);
//
// Reset the interrupt flags.
//
g_ui32GPIOa = 0;
g_ui32GPIOb = 0;
g_ui32GPIOc = 0;
g_ui32Index = 1;
//
// Trigger the interrupt for GPIO C.
//
HWREG(NVIC_SW_TRIG) = INT_GPIOC - 16;
//
// Put the current interrupt state on the display.
//
DisplayIntStatus();
//
// Verify that the interrupts were processed in the correct order.
//
if((g_ui32GPIOa != 3) || (g_ui32GPIOb != 2) || (g_ui32GPIOc != 1))
{
ui8Error |= 2;
}
//
// Wait two seconds.
//
Delay(2);
//
// Indicate that the increasing interrupt priority test is beginning.
//
GrStringDrawCentered(&g_sContext, " Increasing Priority ", -1,
GrContextDpyWidthGet(&g_sContext) / 2, 60, 1);
//
// Set the interrupt priorities so that they are increasing (i.e. C < B <
// A).
//
ROM_IntPrioritySet(INT_GPIOA, 0x00);
ROM_IntPrioritySet(INT_GPIOB, 0x40);
ROM_IntPrioritySet(INT_GPIOC, 0x80);
//
// Reset the interrupt flags.
//
g_ui32GPIOa = 0;
g_ui32GPIOb = 0;
g_ui32GPIOc = 0;
g_ui32Index = 1;
//
// Trigger the interrupt for GPIO C.
//
HWREG(NVIC_SW_TRIG) = INT_GPIOC - 16;
//
// Put the current interrupt state on the display.
//
DisplayIntStatus();
//
// Verify that the interrupts were processed in the correct order.
//
if((g_ui32GPIOa != 1) || (g_ui32GPIOb != 2) || (g_ui32GPIOc != 3))
{
ui8Error |= 4;
}
//
// Wait two seconds.
//
Delay(2);
//
// Disable the interrupts.
//
ROM_IntDisable(INT_GPIOA);
ROM_IntDisable(INT_GPIOB);
ROM_IntDisable(INT_GPIOC);
//
// Disable interrupts to the processor.
//
ROM_IntMasterDisable();
//
// Print out the test results.
//
GrStringDrawCentered(&g_sContext, " Interrupt Priority ", -1,
GrContextDpyWidthGet(&g_sContext) / 2, 60, 1);
if(ui8Error)
{
GrStringDrawCentered(&g_sContext, " Equal: P Inc: P Dec: P ",
-1, GrContextDpyWidthGet(&g_sContext) / 2, 150, 1);
if(ui8Error & 1)
{
GrStringDrawCentered(&g_sContext, " F ", -1, 113, 150, 1);
}
if(ui8Error & 2)
{
GrStringDrawCentered(&g_sContext, " F ", -1, 187, 150, 1);
}
if(ui8Error & 4)
{
GrStringDrawCentered(&g_sContext, " F ", -1, 272, 150, 1);
}
}
else
{
GrStringDrawCentered(&g_sContext, " Success! ", -1,
GrContextDpyWidthGet(&g_sContext) / 2, 150, 1);
}
//
// Flush the display.
//
GrFlush(&g_sContext);
//
// Loop forever.
//
while(1)
{
}
}
//*****************************************************************************
//
// This is the main example program. It checks to see that the interrupts are
// processed in the correct order when they have identical priorities,
// increasing priorities, and decreasing priorities. This exercises interrupt
// preemption and tail chaining.
//
//*****************************************************************************
int
main(void)
{
uint32_t ui32Error;
//
// 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);
//
// Enable the peripherals used by this example.
//
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOE);
//
// Initialize the UART.
//
ConfigureUART();
UARTprintf("\033[2JInterrupts\n");
//
// Configure the PB0-PB2 to be outputs to indicate entry/exit of one
// of the interrupt handlers.
//
ROM_GPIOPinTypeGPIOOutput(GPIO_PORTE_BASE, GPIO_PIN_1 | GPIO_PIN_2 |
GPIO_PIN_3);
ROM_GPIOPinWrite(GPIO_PORTE_BASE, GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_3, 0);
//
// Set up and enable the SysTick timer. It will be used as a reference
// for delay loops in the interrupt handlers. The SysTick timer period
// will be set up for one second.
//
ROM_SysTickPeriodSet(ROM_SysCtlClockGet());
ROM_SysTickEnable();
//
// Reset the error indicator.
//
ui32Error = 0;
//
// Enable interrupts to the processor.
//
ROM_IntMasterEnable();
//
// Enable the interrupts.
//
ROM_IntEnable(INT_GPIOA);
ROM_IntEnable(INT_GPIOB);
ROM_IntEnable(INT_GPIOC);
//
// Indicate that the equal interrupt priority test is beginning.
//
UARTprintf("\nEqual Priority\n");
//
// Set the interrupt priorities so they are all equal.
//
ROM_IntPrioritySet(INT_GPIOA, 0x00);
ROM_IntPrioritySet(INT_GPIOB, 0x00);
ROM_IntPrioritySet(INT_GPIOC, 0x00);
//
// Reset the interrupt flags.
//
g_ui32GPIOa = 0;
g_ui32GPIOb = 0;
g_ui32GPIOc = 0;
g_ui32Index = 1;
//
// Trigger the interrupt for GPIO C.
//
HWREG(NVIC_SW_TRIG) = INT_GPIOC - 16;
//
// Put the current interrupt state on the LCD.
//
DisplayIntStatus();
//
// Verify that the interrupts were processed in the correct order.
//
if((g_ui32GPIOa != 3) || (g_ui32GPIOb != 2) || (g_ui32GPIOc != 1))
{
ui32Error |= 1;
}
//
// Wait two seconds.
//
Delay(2);
//
// Indicate that the decreasing interrupt priority test is beginning.
//
UARTprintf("\nDecreasing Priority\n");
//
// Set the interrupt priorities so that they are decreasing (i.e. C > B >
// A).
//
ROM_IntPrioritySet(INT_GPIOA, 0x80);
ROM_IntPrioritySet(INT_GPIOB, 0x40);
ROM_IntPrioritySet(INT_GPIOC, 0x00);
//
// Reset the interrupt flags.
//
g_ui32GPIOa = 0;
g_ui32GPIOb = 0;
g_ui32GPIOc = 0;
g_ui32Index = 1;
//
// Trigger the interrupt for GPIO C.
//
HWREG(NVIC_SW_TRIG) = INT_GPIOC - 16;
//
// Put the current interrupt state on the UART.
//
DisplayIntStatus();
//
// Verify that the interrupts were processed in the correct order.
//
if((g_ui32GPIOa != 3) || (g_ui32GPIOb != 2) || (g_ui32GPIOc != 1))
{
ui32Error |= 2;
}
//
// Wait two seconds.
//
Delay(2);
//
// Indicate that the increasing interrupt priority test is beginning.
//
UARTprintf("\nIncreasing Priority\n");
//
// Set the interrupt priorities so that they are increasing (i.e. C < B <
// A).
//
ROM_IntPrioritySet(INT_GPIOA, 0x00);
ROM_IntPrioritySet(INT_GPIOB, 0x40);
ROM_IntPrioritySet(INT_GPIOC, 0x80);
//
// Reset the interrupt flags.
//
g_ui32GPIOa = 0;
g_ui32GPIOb = 0;
g_ui32GPIOc = 0;
g_ui32Index = 1;
//
// Trigger the interrupt for GPIO C.
//
HWREG(NVIC_SW_TRIG) = INT_GPIOC - 16;
//
// Put the current interrupt state on the UART.
//
DisplayIntStatus();
//
// Verify that the interrupts were processed in the correct order.
//
if((g_ui32GPIOa != 1) || (g_ui32GPIOb != 2) || (g_ui32GPIOc != 3))
{
ui32Error |= 4;
}
//
// Wait two seconds.
//
Delay(2);
//
// Disable the interrupts.
//
ROM_IntDisable(INT_GPIOA);
ROM_IntDisable(INT_GPIOB);
ROM_IntDisable(INT_GPIOC);
//
// Disable interrupts to the processor.
//
ROM_IntMasterDisable();
//
// Print out the test results.
//
UARTprintf("\nInterrupt Priority =: %s >: %s <: %s\n",
(ui32Error & 1) ? "Fail" : "Pass",
(ui32Error & 2) ? "Fail" : "Pass",
(ui32Error & 4) ? "Fail" : "Pass");
//
// Loop forever.
//
while(1)
{
}
}
//*****************************************************************************
//
// This is the main example program. It checks to see that the interrupts are
// processed in the correct order when they have identical priorities,
// increasing priorities, and decreasing priorities. This exercises interrupt
// preemption and tail chaining.
//
//*****************************************************************************
int
main(void)
{
unsigned long ulError;
//
// Set the clocking to run directly from the crystal.
//
ROM_SysCtlClockSet(SYSCTL_SYSDIV_1 | SYSCTL_USE_OSC | SYSCTL_OSC_MAIN |
SYSCTL_XTAL_16MHZ);
//
// Enable the peripherals used by this example.
//
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
//
// Initialize the UART.
//
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);
GPIOPinConfigure(GPIO_PA0_U0RX);
GPIOPinConfigure(GPIO_PA1_U0TX);
ROM_GPIOPinTypeUART(GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_1);
UARTStdioInit(0);
UARTprintf("\033[2JInterrupts\n");
//
// Configure the F0, D1 and D2 to be outputs to indicate entry/exit of one
// of the interrupt handlers.
//
ROM_GPIOPinTypeGPIOOutput(GPIO_PORTB_BASE,
GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_2);
ROM_GPIOPinWrite(GPIO_PORTB_BASE, GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_2, 0);
//
// Set up and enable the SysTick timer. It will be used as a reference
// for delay loops in the interrupt handlers. The SysTick timer period
// will be set up for one second.
//
ROM_SysTickPeriodSet(ROM_SysCtlClockGet());
ROM_SysTickEnable();
//
// Reset the error indicator.
//
ulError = 0;
//
// Enable interrupts to the processor.
//
ROM_IntMasterEnable();
//
// Enable the interrupts.
//
ROM_IntEnable(INT_GPIOA);
ROM_IntEnable(INT_GPIOB);
ROM_IntEnable(INT_GPIOC);
//
// Indicate that the equal interrupt priority test is beginning.
//
UARTprintf("\nEqual Priority\n");
//
// Set the interrupt priorities so they are all equal.
//
ROM_IntPrioritySet(INT_GPIOA, 0x00);
ROM_IntPrioritySet(INT_GPIOB, 0x00);
ROM_IntPrioritySet(INT_GPIOC, 0x00);
//
// Reset the interrupt flags.
//
g_ulGPIOa = 0;
g_ulGPIOb = 0;
g_ulGPIOc = 0;
g_ulIndex = 1;
//
// Trigger the interrupt for GPIO C.
//
HWREG(NVIC_SW_TRIG) = INT_GPIOC - 16;
//
// Put the current interrupt state on the LCD.
//
DisplayIntStatus();
//
// Verify that the interrupts were processed in the correct order.
//
if((g_ulGPIOa != 3) || (g_ulGPIOb != 2) || (g_ulGPIOc != 1))
{
ulError |= 1;
}
//
// Wait two seconds.
//
Delay(2);
//
// Indicate that the decreasing interrupt priority test is beginning.
//
UARTprintf("\nDecreasing Priority\n");
//
// Set the interrupt priorities so that they are decreasing (i.e. C > B >
// A).
//
ROM_IntPrioritySet(INT_GPIOA, 0x80);
ROM_IntPrioritySet(INT_GPIOB, 0x40);
ROM_IntPrioritySet(INT_GPIOC, 0x00);
//
// Reset the interrupt flags.
//
g_ulGPIOa = 0;
g_ulGPIOb = 0;
g_ulGPIOc = 0;
g_ulIndex = 1;
//
// Trigger the interrupt for GPIO C.
//
HWREG(NVIC_SW_TRIG) = INT_GPIOC - 16;
//
// Put the current interrupt state on the UART.
//
DisplayIntStatus();
//
// Verify that the interrupts were processed in the correct order.
//
if((g_ulGPIOa != 3) || (g_ulGPIOb != 2) || (g_ulGPIOc != 1))
{
ulError |= 2;
}
//
// Wait two seconds.
//
Delay(2);
//
// Indicate that the increasing interrupt priority test is beginning.
//
UARTprintf("\nIncreasing Priority\n");
//
// Set the interrupt priorities so that they are increasing (i.e. C < B <
// A).
//
ROM_IntPrioritySet(INT_GPIOA, 0x00);
ROM_IntPrioritySet(INT_GPIOB, 0x40);
ROM_IntPrioritySet(INT_GPIOC, 0x80);
//
// Reset the interrupt flags.
//
g_ulGPIOa = 0;
g_ulGPIOb = 0;
g_ulGPIOc = 0;
g_ulIndex = 1;
//
// Trigger the interrupt for GPIO C.
//
HWREG(NVIC_SW_TRIG) = INT_GPIOC - 16;
//
// Put the current interrupt state on the UART.
//
DisplayIntStatus();
//
// Verify that the interrupts were processed in the correct order.
//
if((g_ulGPIOa != 1) || (g_ulGPIOb != 2) || (g_ulGPIOc != 3))
{
ulError |= 4;
}
//
// Wait two seconds.
//
Delay(2);
//
// Disable the interrupts.
//
ROM_IntDisable(INT_GPIOA);
ROM_IntDisable(INT_GPIOB);
ROM_IntDisable(INT_GPIOC);
//
// Disable interrupts to the processor.
//
ROM_IntMasterDisable();
//
// Print out the test results.
//
UARTprintf("\nInterrupt Priority =: %s >: %s <: %s\n",
(ulError & 1) ? "Fail" : "Pass",
(ulError & 2) ? "Fail" : "Pass",
(ulError & 4) ? "Fail" : "Pass");
//
// Finished.
//
while(1)
{
}
}
//*****************************************************************************
//
// This is the main example program. It checks to see that the interrupts are
// processed in the correct order when they have identical priorities,
// increasing priorities, and decreasing priorities. This exercises interrupt
// preemption and tail chaining.
//
//*****************************************************************************
int
main(void)
{
tRectangle sRect;
uint_fast8_t ui8Error;
//
// 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);
//
// Enable the peripherals used by this example.
//
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);
//
// Initialize the display driver.
//
CFAL96x64x16Init();
//
// Initialize the graphics context and find the middle X coordinate.
//
GrContextInit(&g_sContext, &g_sCFAL96x64x16);
//
// Fill the top part of the screen with blue to create the banner.
//
sRect.i16XMin = 0;
sRect.i16YMin = 0;
sRect.i16XMax = GrContextDpyWidthGet(&g_sContext) - 1;
sRect.i16YMax = 9;
GrContextForegroundSet(&g_sContext, ClrDarkBlue);
GrRectFill(&g_sContext, &sRect);
//
// Change foreground for white text.
//
GrContextForegroundSet(&g_sContext, ClrWhite);
//
// Put the application name in the middle of the banner.
//
GrContextFontSet(&g_sContext, g_psFontFixed6x8);
GrStringDrawCentered(&g_sContext, "interrupts", -1,
GrContextDpyWidthGet(&g_sContext) / 2, 4, 0);
GrContextFontSet(&g_sContext, g_psFontFixed6x8);
//
// Put the status header text on the display.
//
GrStringDraw(&g_sContext, "Active:", -1, 6, 32, 0);
GrStringDraw(&g_sContext, "Pending:", -1, 0, 44, 0);
//
// Configure the PB0-PB2 to be outputs to indicate entry/exit of one
// of the interrupt handlers.
//
ROM_GPIOPinTypeGPIOOutput(GPIO_PORTD_BASE, GPIO_PIN_0 | GPIO_PIN_1 |
GPIO_PIN_3);
ROM_GPIOPinWrite(GPIO_PORTD_BASE, GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_2, 0);
//
// Set up and enable the SysTick timer. It will be used as a reference
// for delay loops in the interrupt handlers. The SysTick timer period
// will be set up for one second.
//
ROM_SysTickPeriodSet(ROM_SysCtlClockGet());
ROM_SysTickEnable();
//
// Reset the error indicator.
//
ui8Error = 0;
//
// Enable interrupts to the processor.
//
ROM_IntMasterEnable();
//
// Enable the interrupts.
//
ROM_IntEnable(INT_GPIOA);
ROM_IntEnable(INT_GPIOB);
ROM_IntEnable(INT_GPIOC);
//
// Indicate that the equal interrupt priority test is beginning.
//
GrStringDrawCentered(&g_sContext, "Equal Pri", -1,
GrContextDpyWidthGet(&g_sContext) / 2, 20, 1);
//
// Set the interrupt priorities so they are all equal.
//
ROM_IntPrioritySet(INT_GPIOA, 0x00);
ROM_IntPrioritySet(INT_GPIOB, 0x00);
ROM_IntPrioritySet(INT_GPIOC, 0x00);
//
// Reset the interrupt flags.
//
g_ui32GPIOa = 0;
g_ui32GPIOb = 0;
g_ui32GPIOc = 0;
g_ui32Index = 1;
//
// Trigger the interrupt for GPIO C.
//
HWREG(NVIC_SW_TRIG) = INT_GPIOC - 16;
//
// Put the current interrupt state on the LCD.
//
DisplayIntStatus();
//
// Verify that the interrupts were processed in the correct order.
//
if((g_ui32GPIOa != 3) || (g_ui32GPIOb != 2) || (g_ui32GPIOc != 1))
{
ui8Error |= 1;
}
//
// Wait two seconds.
//
Delay(2);
//
// Indicate that the decreasing interrupt priority test is beginning.
//
GrStringDrawCentered(&g_sContext, " Decreasing Pri ", -1,
GrContextDpyWidthGet(&g_sContext) / 2, 20, 1);
//
// Set the interrupt priorities so that they are decreasing (i.e. C > B >
// A).
//
ROM_IntPrioritySet(INT_GPIOA, 0x80);
ROM_IntPrioritySet(INT_GPIOB, 0x40);
ROM_IntPrioritySet(INT_GPIOC, 0x00);
//
// Reset the interrupt flags.
//
g_ui32GPIOa = 0;
g_ui32GPIOb = 0;
g_ui32GPIOc = 0;
g_ui32Index = 1;
//
// Trigger the interrupt for GPIO C.
//
HWREG(NVIC_SW_TRIG) = INT_GPIOC - 16;
//
// Put the current interrupt state on the CSTN.
//
DisplayIntStatus();
//
// Verify that the interrupts were processed in the correct order.
//
if((g_ui32GPIOa != 3) || (g_ui32GPIOb != 2) || (g_ui32GPIOc != 1))
{
ui8Error |= 2;
}
//
// Wait two seconds.
//
Delay(2);
//
// Indicate that the increasing interrupt priority test is beginning.
//
GrStringDrawCentered(&g_sContext, " Increasing Pri ", -1,
GrContextDpyWidthGet(&g_sContext) / 2, 20, 1);
//
// Set the interrupt priorities so that they are increasing (i.e. C < B <
// A).
//
ROM_IntPrioritySet(INT_GPIOA, 0x00);
ROM_IntPrioritySet(INT_GPIOB, 0x40);
ROM_IntPrioritySet(INT_GPIOC, 0x80);
//
// Reset the interrupt flags.
//
g_ui32GPIOa = 0;
g_ui32GPIOb = 0;
g_ui32GPIOc = 0;
g_ui32Index = 1;
//
// Trigger the interrupt for GPIO C.
//
HWREG(NVIC_SW_TRIG) = INT_GPIOC - 16;
//
// Put the current interrupt state on the CSTN.
//
DisplayIntStatus();
//
// Verify that the interrupts were processed in the correct order.
//
if((g_ui32GPIOa != 1) || (g_ui32GPIOb != 2) || (g_ui32GPIOc != 3))
{
ui8Error |= 4;
}
//
// Wait two seconds.
//
Delay(2);
//
// Disable the interrupts.
//
ROM_IntDisable(INT_GPIOA);
ROM_IntDisable(INT_GPIOB);
ROM_IntDisable(INT_GPIOC);
//
// Disable interrupts to the processor.
//
ROM_IntMasterDisable();
//
// Print out results if error occurred.
//
if(ui8Error)
{
GrStringDraw(&g_sContext, "Equal: P ", -1, 0, 32, 1);
GrStringDraw(&g_sContext, " Inc: P ", -1, 0, 44, 1);
GrStringDraw(&g_sContext, " Dec: P ", -1, 0, 56, 1);
if(ui8Error & 1)
{
GrStringDraw(&g_sContext, "F ", -1, 42, 32, 1);
}
if(ui8Error & 2)
{
GrStringDraw(&g_sContext, "F ", -1, 42, 44, 1);
}
if(ui8Error & 4)
{
GrStringDraw(&g_sContext, "F ", -1, 42, 56, 1);
}
}
else
{
GrStringDrawCentered(&g_sContext, " Success! ", -1,
GrContextDpyWidthGet(&g_sContext) / 2, 20, 1);
}
//
// Flush the display.
//
GrFlush(&g_sContext);
//
// Loop forever.
//
while(1)
{
}
}
//*****************************************************************************
//
// This is the main example program. It checks to see that the interrupts are
// processed in the correct order when they have identical priorities,
// increasing priorities, and decreasing priorities. This exercises interrupt
// preemption and tail chaining.
//
//*****************************************************************************
int
main(void)
{
uint_fast8_t ui8Error;
//
// Run from the PLL at 120 MHz.
//
g_ui32SysClock = MAP_SysCtlClockFreqSet((SYSCTL_XTAL_25MHZ |
SYSCTL_OSC_MAIN | SYSCTL_USE_PLL |
SYSCTL_CFG_VCO_480), 120000000);
//
// Configure the device pins.
//
PinoutSet(false, false);
//
// Configure the UART.
//
ConfigureUART();
//
// Configure the B3, L1 and L0 to be outputs to indicate entry/exit of one
// of the interrupt handlers.
//
GPIOPinTypeGPIOOutput(GPIO_A_BASE, GPIO_A_PIN);
GPIOPinTypeGPIOOutput(GPIO_B_BASE, GPIO_B_PIN);
GPIOPinTypeGPIOOutput(GPIO_C_BASE, GPIO_C_PIN);
GPIOPinWrite(GPIO_A_BASE, GPIO_A_PIN, 0);
GPIOPinWrite(GPIO_B_BASE, GPIO_B_PIN, 0);
GPIOPinWrite(GPIO_C_BASE, GPIO_C_PIN, 0);
//
// Set up and enable the SysTick timer. It will be used as a reference
// for delay loops in the interrupt handlers. The SysTick timer period
// will be set up for 100 times per second.
//
ROM_SysTickPeriodSet(g_ui32SysClock / 100);
ROM_SysTickEnable();
//
// Reset the error indicator.
//
ui8Error = 0;
//
// Enable interrupts to the processor.
//
ROM_IntMasterEnable();
//
// Enable the interrupts.
//
ROM_IntEnable(INT_GPIOA);
ROM_IntEnable(INT_GPIOB);
ROM_IntEnable(INT_GPIOC);
//
// Indicate that the equal interrupt priority test is beginning.
//
g_ui32IntMode = EQUAL_PRIORITY;
//
// Set the interrupt priorities so they are all equal.
//
ROM_IntPrioritySet(INT_GPIOA, 0x00);
ROM_IntPrioritySet(INT_GPIOB, 0x00);
ROM_IntPrioritySet(INT_GPIOC, 0x00);
//
// Reset the interrupt flags.
//
g_ui32GPIOa = 0;
g_ui32GPIOb = 0;
g_ui32GPIOc = 0;
g_ui32Index = 1;
//
// Trigger the interrupt for GPIO C.
//
HWREG(NVIC_SW_TRIG) = INT_GPIOC - 16;
//
// Put the current interrupt state on the LCD.
//
DisplayIntStatus();
//
// Verify that the interrupts were processed in the correct order.
//
if((g_ui32GPIOa != 3) || (g_ui32GPIOb != 2) || (g_ui32GPIOc != 1))
{
ui8Error |= 1;
}
//
// Wait two seconds.
//
Delay(2);
//
// Indicate that the decreasing interrupt priority test is beginning.
//
g_ui32IntMode = DECREASING_PRIORITY;
//
// Set the interrupt priorities so that they are decreasing (i.e. C > B >
// A).
//
ROM_IntPrioritySet(INT_GPIOA, 0x80);
ROM_IntPrioritySet(INT_GPIOB, 0x40);
ROM_IntPrioritySet(INT_GPIOC, 0x00);
//
// Reset the interrupt flags.
//
g_ui32GPIOa = 0;
g_ui32GPIOb = 0;
g_ui32GPIOc = 0;
g_ui32Index = 1;
//
// Trigger the interrupt for GPIO C.
//
HWREG(NVIC_SW_TRIG) = INT_GPIOC - 16;
//
// Put the current interrupt state on the UART.
//
DisplayIntStatus();
//
// Verify that the interrupts were processed in the correct order.
//
if((g_ui32GPIOa != 3) || (g_ui32GPIOb != 2) || (g_ui32GPIOc != 1))
{
ui8Error |= 2;
}
//
// Wait two seconds.
//
Delay(2);
//
// Indicate that the increasing interrupt priority test is beginning.
//
g_ui32IntMode = INCREASING_PRIORITY;
//
// Set the interrupt priorities so that they are increasing (i.e. C < B <
// A).
//
ROM_IntPrioritySet(INT_GPIOA, 0x00);
ROM_IntPrioritySet(INT_GPIOB, 0x40);
ROM_IntPrioritySet(INT_GPIOC, 0x80);
//
// Reset the interrupt flags.
//
g_ui32GPIOa = 0;
g_ui32GPIOb = 0;
g_ui32GPIOc = 0;
g_ui32Index = 1;
//
// Trigger the interrupt for GPIO C.
//
HWREG(NVIC_SW_TRIG) = INT_GPIOC - 16;
//
// Put the current interrupt state on the UART.
//
DisplayIntStatus();
//
// Verify that the interrupts were processed in the correct order.
//
if((g_ui32GPIOa != 1) || (g_ui32GPIOb != 2) || (g_ui32GPIOc != 3))
{
ui8Error |= 4;
}
//
// Wait two seconds.
//
Delay(2);
//
// Disable the interrupts.
//
ROM_IntDisable(INT_GPIOA);
ROM_IntDisable(INT_GPIOB);
ROM_IntDisable(INT_GPIOC);
//
// Disable interrupts to the processor.
//
ROM_IntMasterDisable();
//
// Print out the test results.
//
UARTprintf("\033[2J\033[H");
UARTprintf("Interrupts example\n\n");
if(ui8Error)
{
if(ui8Error & 1)
{
UARTprintf("Equal Priority Fail!\n");
}
if(ui8Error & 2)
{
UARTprintf("Decreasing Priority Fail!\n");
}
if(ui8Error & 4)
{
UARTprintf("Increasing Priority Fail!\n");
}
}
else
{
UARTprintf("Success!");
}
//
// Loop forever.
//
while(1)
{
}
}
