//............................................................................
void BSP_init(int argc, char *argv[]) {
// set the system clock as specified in lm3s_config.h (20MHz from PLL)
SystemInit();
// enable clock to the peripherals used by the application
SYSCTL->RCGC2 |= (1 << 0) | (1 << 2); // enable clock to GPIOA & C
__NOP(); // wait after enabling clocks
__NOP();
__NOP();
// configure the LED and push button
GPIOC->DIR |= USER_LED; // set direction: output
GPIOC->DEN |= USER_LED; // digital enable
GPIOC->DATA_Bits[USER_LED] = 0; // turn the User LED off
GPIOC->DIR &= ~PUSH_BUTTON; // set direction: input
GPIOC->DEN |= PUSH_BUTTON; // digital enable
Display96x16x1Init(1); // initialize the OLED display
Display96x16x1StringDraw("Dining Philos", 0, 0);
Display96x16x1StringDraw("0 ,1 ,2 ,3 ,4", 0, 1);
if (QS_INIT((void *)0) == 0) { // initialize the QS software tracing
Q_ERROR();
}
(void)argc; // avoid compiler warning about unused parameters
(void)argv;
}
void Task_Display( void *pvParameters ) {
char TimeString[24];
int Task1_Status;
portTickType TaskStartTime;
//
// Initialize the OLED display and write status.
//
Display96x16x1Init(true);
Display96x16x1StringDraw( "Eduardo", 0, 0 );
//
// Set up periodic execution
//
TaskStartTime = xTaskGetTickCount();
while ( 1 ) {
Task1_Status = sprintf( TimeString, "Time: %d", xPortSysTickCount );
Task1_Status = Task1_Status;
Display96x16x1StringDraw( TimeString, 0, 8 );
// vTaskDelay( 500 );
vTaskDelayUntil( &TaskStartTime, 500 );
}
}
//............................................................................
void BSP_init(void) {
// set the system clock as specified in lm3s_config.h (20MHz from PLL)
SystemInit();
// enable clock to the peripherals used by the application
SYSCTL->RCGC2 |= 1U | (1U << 2); // enable clock to GPIOA & C
__NOP(); // wait after enabling clocks
__NOP();
__NOP();
// configure the LED and push button
GPIOC->DIR |= USER_LED; // set direction: output
GPIOC->DEN |= USER_LED; // digital enable
GPIOC->DATA_Bits[USER_LED] = 0U; // turn the User LED off
GPIOC->DIR &= ~PUSH_BUTTON; // set direction: input
GPIOC->DEN |= PUSH_BUTTON; // digital enable
Display96x16x1Init(1U); // initialize the OLED display
Display96x16x1StringDraw(&"Dining Philos"[0], 0U, 0U);
Display96x16x1StringDraw(&"0 ,1 ,2 ,3 ,4"[0], 0U, 1U);
Q_ALLEGE(QS_INIT(static_cast<void *>(0)));
QS_OBJ_DICTIONARY(&l_SysTick_Handler);
QS_OBJ_DICTIONARY(&l_GPIOPortA_IRQHandler);
QS_USR_DICTIONARY(PHILO_STAT);
}
//*****************************************************************************
//
// Print "Hello world!" to the LCD on the Stellaris evaluation board.
//
//*****************************************************************************
int
main(void)
{
//
// Set the clocking to run directly from the crystal.
//
SysCtlClockSet(SYSCTL_SYSDIV_1 | SYSCTL_USE_OSC | SYSCTL_OSC_MAIN |
SYSCTL_XTAL_6MHZ);
//
// Initialize the OLED display.
//
Display96x16x1Init(false);
//
// Hello!
//
Display96x16x1StringDraw("Hello World!", 0, 0);
//
// Finished.
//
while(1)
{
}
}
//*****************************************************************************
//
// This example demonstrates the use of the watchdog timer.
//
//*****************************************************************************
int
main(void)
{
//
// Set the clocking to run directly from the crystal.
//
SysCtlClockSet(SYSCTL_SYSDIV_1 | SYSCTL_USE_OSC | SYSCTL_OSC_MAIN |
SYSCTL_XTAL_6MHZ);
//
// Initialize the OLED display and write status.
//
Display96x16x1Init(false);
Display96x16x1StringDraw("Watchdog example", 0, 0);
//
// Enable the peripherals used by this example.
//
SysCtlPeripheralEnable(SYSCTL_PERIPH_WDOG0);
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOC);
//
// Enable processor interrupts.
//
IntMasterEnable();
//
// Set GPIO C5 as an output. This drives an LED on the board that will
// toggle when a watchdog interrupt is processed.
//
GPIOPinTypeGPIOOutput(GPIO_PORTC_BASE, GPIO_PIN_5);
//
// Enable the watchdog interrupt.
//
IntEnable(INT_WATCHDOG);
//
// Set the period of the watchdog timer.
//
WatchdogReloadSet(WATCHDOG0_BASE, SysCtlClockGet());
//
// Enable reset generation from the watchdog timer.
//
WatchdogResetEnable(WATCHDOG0_BASE);
//
// Enable the watchdog timer.
//
WatchdogEnable(WATCHDOG0_BASE);
//
// Loop forever while the LED winks as watchdog interrupts are handled.
//
while(1)
{
}
}
//*****************************************************************************
//
// This example demonstrates how to send a string of data to the UART.
//
//*****************************************************************************
int
main(void)
{
//
// Set the clocking to run directly from the crystal.
//
SysCtlClockSet(SYSCTL_SYSDIV_1 | SYSCTL_USE_OSC | SYSCTL_OSC_MAIN |
SYSCTL_XTAL_6MHZ);
//
// Initialize the OLED display and write status.
//
Display96x16x1Init(false);
Display96x16x1StringDraw("UART echo: UART0", 0, 0);
Display96x16x1StringDraw("115,200, 8-N-1", 6, 1);
//
// Enable the peripherals used by this example.
//
SysCtlPeripheralEnable(SYSCTL_PERIPH_UART0);
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);
//
// Enable processor interrupts.
//
IntMasterEnable();
//
// Set GPIO A0 and A1 as UART pins.
//
GPIOPinTypeUART(GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_1);
//
// Configure the UART for 115,200, 8-N-1 operation.
//
UARTConfigSetExpClk(UART0_BASE, SysCtlClockGet(), 115200,
(UART_CONFIG_WLEN_8 | UART_CONFIG_STOP_ONE |
UART_CONFIG_PAR_NONE));
//
// Enable the UART interrupt.
//
IntEnable(INT_UART0);
UARTIntEnable(UART0_BASE, UART_INT_RX | UART_INT_RT);
//
// Prompt for text to be entered.
//
UARTSend((unsigned char *)"Enter text: ", 12);
//
// Loop forever echoing data through the UART.
//
while(1)
{
}
}
//*****************************************************************************
//
// This function initializes the display task. It should be called from the
// application initialization code.
//
//*****************************************************************************
void
DisplayTaskInit(void *pvParam)
{
//
// Initialize the display driver and turn the display on.
//
Display96x16x1Init(false);
Display96x16x1DisplayOn();
}
//*****************************************************************************
//
// 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.
//
SysCtlClockSet(SYSCTL_SYSDIV_1 | SYSCTL_USE_OSC | SYSCTL_OSC_MAIN |
SYSCTL_XTAL_6MHZ);
//
// Enable the peripherals used by this example.
//
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);
//
// Initialize the OLED display and write status.
//
Display96x16x1Init(false);
Display96x16x1StringDraw("Act: Pend: ", 0, 1);
//
// Configure the first three pins of GPIO port D to be outputs to indicate
// entry/exit of one of the interrupt handlers.
//
GPIOPinTypeGPIOOutput(GPIO_PORTD_BASE,
GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_2);
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.
//
SysTickPeriodSet(SysCtlClockGet());
SysTickEnable();
//
// Reset the error indicator.
//
ulError = 0;
//
// Enable interrupts to the processor.
//
IntMasterEnable();
//
// Enable the interrupts.
//
IntEnable(INT_GPIOA);
IntEnable(INT_GPIOB);
IntEnable(INT_GPIOC);
//
// Indicate that the equal interrupt priority test is beginning.
//
Display96x16x1StringDraw("Equal Priority ", 0, 0);
//
// Set the interrupt priorities so they are all equal.
//
IntPrioritySet(INT_GPIOA, 0x00);
IntPrioritySet(INT_GPIOB, 0x00);
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.
//
Display96x16x1StringDraw("Dec. Priority ", 0, 0);
//
// Set the interrupt priorities so that they are decreasing (i.e. C > B >
// A).
//
IntPrioritySet(INT_GPIOA, 0x80);
IntPrioritySet(INT_GPIOB, 0x40);
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 |= 2;
}
//
// Wait two seconds.
//
Delay(2);
//
// Indicate that the increasing interrupt priority test is beginning.
//
Display96x16x1StringDraw("Inc. Priority ", 0, 0);
//
// Set the interrupt priorities so that they are increasing (i.e. C < B <
// A).
//
IntPrioritySet(INT_GPIOA, 0x00);
IntPrioritySet(INT_GPIOB, 0x40);
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 LCD.
//
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.
//
IntDisable(INT_GPIOA);
IntDisable(INT_GPIOB);
IntDisable(INT_GPIOC);
//
// Disable interrupts to the processor.
//
IntMasterDisable();
//
// Print out the test results.
//
Display96x16x1StringDraw("Int Priority ", 0, 0);
if(ulError)
{
Display96x16x1StringDraw("=: P >: P <: P", 0, 1);
if(ulError & 1)
{
Display96x16x1StringDraw("F", 18, 1);
}
if(ulError & 2)
{
Display96x16x1StringDraw("F", 54, 1);
}
if(ulError & 4)
{
Display96x16x1StringDraw("F", 90, 1);
}
}
else
{
Display96x16x1StringDraw("Success. ", 0, 1);
}
//
// Finished.
//
while(1)
{
}
}
//*****************************************************************************
//
// This example demonstrates how to configure MPU regions for different levels
// of memory protection. The following memory map is set up:
//
// 0000.0000 - 0000.1C00 - rgn 0: executable read-only, flash
// 0000.1C00 - 0000.2000 - rgn 0: no access, flash (disabled sub-region 7)
// 2000.0000 - 2000.1000 - rgn 1: read-write, RAM
// 2000.1000 - 2000.1400 - rgn 2: read-only, RAM (disabled sub-rgn 4 of rgn 1)
// 2000.1400 - 2000.2000 - rgn 1: read-write, RAM
// 4000.0000 - 4001.0000 - rgn 3: read-write, peripherals
// 4001.0000 - 4002.0000 - rgn 3: no access (disabled sub-region 1)
// 4002.0000 - 4006.0000 - rgn 3: read-write, peripherals
// 4006.0000 - 4008.0000 - rgn 3: no access (disabled sub-region 6, 7)
// E000.E000 - E000.F000 - rgn 4: read-write, NVIC
//
// The example code will attempt to perform the following operations and check
// the faulting behavior:
//
// - write to flash (should fault)
// - read from the disabled area of flash (should fault)
// - read from the read-only area of RAM (should not fault)
// - write to the read-only section of RAM (should fault)
//
//*****************************************************************************
int
main(void)
{
unsigned int bFail = 0;
//
// Set the clocking to run directly from the crystal.
//
SysCtlClockSet(SYSCTL_SYSDIV_1 | SYSCTL_USE_OSC | SYSCTL_OSC_MAIN |
SYSCTL_XTAL_8MHZ);
//
// Initialize the OLED display and write status.
//
Display96x16x1Init(false);
Display96x16x1StringDraw("MPU example", 12, 0);
//
// Configure an executable, read-only MPU region for flash. It is an 8 KB
// region with the last 1 KB disabled to result in a 7 KB executable
// region. This region is needed so that the program can execute from
// flash.
//
MPURegionSet(0, FLASH_BASE,
MPU_RGN_SIZE_8K |
MPU_RGN_PERM_EXEC |
MPU_RGN_PERM_PRV_RO_USR_RO |
MPU_SUB_RGN_DISABLE_7 |
MPU_RGN_ENABLE);
//
// Configure a read-write MPU region for RAM. It is an 8 KB region. There
// is a 1 KB sub-region in the middle that is disabled in order to open up
// a hole in which different permissions can be applied.
//
MPURegionSet(1, SRAM_BASE,
MPU_RGN_SIZE_8K |
MPU_RGN_PERM_NOEXEC |
MPU_RGN_PERM_PRV_RW_USR_RW |
MPU_SUB_RGN_DISABLE_4 |
MPU_RGN_ENABLE);
//
// Configure a read-only MPU region for the 1 KB of RAM that is disabled in
// the previous region. This region is used for demonstrating read-only
// permissions.
//
MPURegionSet(2, SRAM_BASE + 0x1000,
MPU_RGN_SIZE_1K |
MPU_RGN_PERM_NOEXEC |
MPU_RGN_PERM_PRV_RO_USR_RO |
MPU_RGN_ENABLE);
//
// Configure a read-write MPU region for peripherals. The region is 512 KB
// total size, with several sub-regions disabled to prevent access to areas
// where there are no peripherals. This region is needed because the
// program needs access to some peripherals.
//
MPURegionSet(3, 0x40000000,
MPU_RGN_SIZE_512K |
MPU_RGN_PERM_NOEXEC |
MPU_RGN_PERM_PRV_RW_USR_RW |
MPU_SUB_RGN_DISABLE_1 |
MPU_SUB_RGN_DISABLE_6 |
MPU_SUB_RGN_DISABLE_7 |
MPU_RGN_ENABLE);
//
// Configure a read-write MPU region for access to the NVIC. The region is
// 4 KB in size. This region is needed because NVIC registers are needed
// in order to control the MPU.
//
MPURegionSet(4, NVIC_BASE,
MPU_RGN_SIZE_4K |
MPU_RGN_PERM_NOEXEC |
MPU_RGN_PERM_PRV_RW_USR_RW |
MPU_RGN_ENABLE);
//
// Need to clear the NVIC fault status register to make sure there is no
// status hanging around from a previous program.
//
g_ulFaultStatus = HWREG(NVIC_FAULT_STAT);
HWREG(NVIC_FAULT_STAT) = g_ulFaultStatus;
//
// Enable the MPU fault.
//
IntEnable(FAULT_MPU);
//
// Enable the MPU. This will begin to enforce the memory protection
// regions. The MPU is configured so that when in the hard fault or NMI
// exceptions, a default map will be used. Neither of these should occur
// in this example program.
//
MPUEnable(MPU_CONFIG_HARDFLT_NMI);
//
// Attempt to write to the flash. This should cause a protection fault due
// to the fact that this region is read-only.
//
g_ulMPUFaultCount = 0;
HWREG(0x100) = 0x12345678;
//
// Verify that the fault occurred, at the expected address.
//
if(!((g_ulMPUFaultCount == 1) &&
(g_ulFaultStatus == 0x82) &&
(g_ulMMAR == 0x100)))
{
bFail = 1;
}
//
// The MPU was disabled when the previous fault occurred, so it needs to be
// re-enabled.
//
MPUEnable(MPU_CONFIG_HARDFLT_NMI);
//
// Attempt to read from the disabled section of flash, the upper 1 KB of
// the 8 KB region.
//
g_ulMPUFaultCount = 0;
g_ulValue = HWREG(0x1C10);
//
// Verify that the fault occurred, at the expected address.
//
if(!((g_ulMPUFaultCount == 1) &&
(g_ulFaultStatus == 0x82) &&
(g_ulMMAR == 0x1C10)))
{
bFail = 1;
}
//
// The MPU was disabled when the previous fault occurred, so it needs to be
// re-enabled.
//
MPUEnable(MPU_CONFIG_HARDFLT_NMI);
//
// Attempt to read from the read-only area of RAM, the middle 1 KB of the
// 8 KB region.
//
g_ulMPUFaultCount = 0;
g_ulValue = HWREG(0x20001040);
//
// Verify that the RAM read did not cause a fault.
//
if(g_ulMPUFaultCount != 0)
{
bFail = 1;
}
//
// The MPU should not have been disabled since the last access was not
// supposed to cause a fault. But if it did cause a fault, then the MPU
// will be disabled, so re-enable it here anyway, just in case.
//
MPUEnable(MPU_CONFIG_HARDFLT_NMI);
//
// Attempt to write to the read-only area of RAM, the middle 1 KB of the
// 8 KB region.
//
g_ulMPUFaultCount = 0;
HWREG(0x20001060) = 0xabcdef00;
//
// Verify that the RAM write caused a fault.
//
if(!((g_ulMPUFaultCount == 1) &&
(g_ulFaultStatus == 0x82) &&
(g_ulMMAR == 0x20001060)))
{
bFail = 1;
}
//
// Display the results of the example program.
//
if(bFail)
{
Display96x16x1StringDraw("Failure!", 24, 1);
}
else
{
Display96x16x1StringDraw("Success!", 24, 1);
}
//
// Disable the MPU, so there are no lingering side effects if another
// program is run.
//
MPUDisable();
//
// Finished.
//
while(1)
{
}
}
//*****************************************************************************
//
// This example demonstrates how to setup the PWM block to generate signals.
//
//*****************************************************************************
int
main(void)
{
unsigned long ulPeriod;
//
// Set the clocking to run directly from the crystal.
//
SysCtlClockSet(SYSCTL_SYSDIV_1 | SYSCTL_USE_OSC | SYSCTL_OSC_MAIN |
SYSCTL_XTAL_6MHZ);
SysCtlPWMClockSet(SYSCTL_PWMDIV_1);
//
// Initialize the OLED display.
//
Display96x16x1Init(false);
//
// Clear the screen and thell the user what is happening.
//
Display96x16x1StringDraw("Generating PWM", 6, 0);
Display96x16x1StringDraw("on PD0 and PD1", 6, 1);
//
// Enable the peripherals used by this example.
//
SysCtlPeripheralEnable(SYSCTL_PERIPH_PWM0);
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);
//
// Set GPIO D0 and D1 as PWM pins. They are used to output the PWM0 and
// PWM1 signals.
//
GPIOPinTypePWM(GPIO_PORTD_BASE, GPIO_PIN_0 | GPIO_PIN_1);
//
// Compute the PWM period based on the system clock.
//
ulPeriod = SysCtlClockGet() / 50000;
//
// Set the PWM period to 50 kHz.
//
PWMGenConfigure(PWM0_BASE, PWM_GEN_0,
PWM_GEN_MODE_UP_DOWN | PWM_GEN_MODE_NO_SYNC);
PWMGenPeriodSet(PWM0_BASE, PWM_GEN_0, ulPeriod);
//
// Set PWM0 to a duty cycle of 25% and PWM1 to a duty cycle of 75%.
//
PWMPulseWidthSet(PWM0_BASE, PWM_OUT_0, ulPeriod / 4);
PWMPulseWidthSet(PWM0_BASE, PWM_OUT_1, ulPeriod * 3 / 4);
//
// Enable the PWM0 and PWM1 output signals.
//
PWMOutputState(PWM0_BASE, PWM_OUT_0_BIT | PWM_OUT_1_BIT, true);
//
// Enable the PWM generator.
//
PWMGenEnable(PWM0_BASE, PWM_GEN_0);
//
// Loop forever while the PWM signals are generated.
//
while(1)
{
}
}
//*****************************************************************************
//
// The main application. It configures the board and then enters a loop
// to show messages on the display and blink the LEDs.
//
//*****************************************************************************
int
main(void)
{
unsigned long ulPHYMR0;
unsigned long ulNextTickLED = 0;
unsigned long ulNextTickDisplay = 0;
unsigned long ulDisplayState = 0;
//
// Set the clocking to directly from the crystal
//
ROM_SysCtlClockSet(SYSCTL_SYSDIV_1 | SYSCTL_USE_OSC | SYSCTL_OSC_MAIN |
SYSCTL_XTAL_16MHZ);
//
// Since the Ethernet is not used, power down the PHY to save battery.
//
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_ETH);
ulPHYMR0 = ROM_EthernetPHYRead(ETH_BASE, PHY_MR0);
ROM_EthernetPHYWrite(ETH_BASE, PHY_MR0, ulPHYMR0 | PHY_MR0_PWRDN);
//
// Initialize the board display
//
Display96x16x1Init(true);
//
// Initialize the GPIO used for the LEDs, and then turn one LED on
// and the other off
//
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);
ROM_GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE, GPIO_PIN_4 | GPIO_PIN_5);
ROM_GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_4, 0);
ROM_GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_5, GPIO_PIN_5);
//
// Set up and enable the SysTick timer to use as a time reference.
// It will be set up for a 100 ms tick.
//
ROM_SysTickPeriodSet(ROM_SysCtlClockGet() / 10);
ROM_SysTickEnable();
ROM_SysTickIntEnable();
//
// Enter loop to run forever, blinking LEDs and printing messages to
// the display
//
for(;;)
{
//
// If LED blink period has timed out, then toggle LEDs.
//
if(g_ulTickCount >= ulNextTickLED)
{
//
// Set next LED toggle timeout for 1 second
//
ulNextTickLED += 10;
//
// Toggle the state of each LED
//
ROM_GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_4 | GPIO_PIN_5,
~ROM_GPIOPinRead(GPIO_PORTF_BASE,
GPIO_PIN_4 | GPIO_PIN_5));
}
//
// If display interval has elapsed, then update display state
//
if(g_ulTickCount >= ulNextTickDisplay)
{
//
// Process the display state. Each state, the display does
// something different.
//
// Odd time intervals are used, like 5.3 seconds, to keep the
// display updates out of sync with the LED blinking which is
// happening on a 1 second interval. This is just for cosmetic
// effect, there is no technical reason it needs to be that way.
//
switch(ulDisplayState)
{
//
// Initial state, show TEXAS INSTRUMENTS for 5.3 seconds
//
case 0:
{
Display96x16x1StringDraw("TEXAS", 29, 0);
Display96x16x1StringDraw("INSTRUMENTS", 11, 1);
ulNextTickDisplay += 53;
ulDisplayState = 1;
break;
}
//
// Next, clear display for 1.3 seconds
//
case 1:
{
Display96x16x1Clear();
ulNextTickDisplay += 13;
ulDisplayState = 2;
break;
}
//
// Show STELLARIS for 5.3 seconds
//
case 2:
{
Display96x16x1StringDraw("STELLARIS", 21, 0);
ulNextTickDisplay += 53;
ulDisplayState = 3;
break;
}
//
// Clear the previous message and then show EVALBOT on
// the second line for 5.3 seconds
//
case 3:
{
Display96x16x1Clear();
Display96x16x1StringDraw("EVALBOT", 27, 1);
ulNextTickDisplay += 53;
ulDisplayState = 4;
break;
}
//
// Clear display for 1.3 seconds, then go back to start
//
case 4:
{
Display96x16x1Clear();
ulNextTickDisplay += 13;
ulDisplayState = 0;
break;
}
//
// Default state. Should never get here, but if so just
// go back to starting state.
//
default:
{
ulDisplayState = 0;
break;
}
} // end switch
} // end if
} // end for(;;)
}
//*****************************************************************************
//
// Demonstrate the use of the boot loader.
//
//*****************************************************************************
int
main(void)
{
//
// Set the clocking to run directly from the crystal.
//
SysCtlClockSet(SYSCTL_SYSDIV_1 | SYSCTL_USE_OSC | SYSCTL_OSC_MAIN |
SYSCTL_XTAL_6MHZ);
//
// Enable the UART and GPIO modules.
//
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOC);
SysCtlPeripheralEnable(SYSCTL_PERIPH_UART0);
//
// Make the UART pins be peripheral controlled.
//
GPIOPinTypeUART(GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_1);
//
// Configure the UART for 115,200, 8-N-1 operation.
//
UARTConfigSetExpClk(UART0_BASE, 6000000, 115200,
(UART_CONFIG_WLEN_8 | UART_CONFIG_STOP_ONE |
UART_CONFIG_PAR_NONE));
//
// Initialize the OLED display.
//
Display96x16x1Init(false);
//
// Indicate what is happening.
//
Display96x16x1StringDraw("Boot Loader Two", 0, 0);
Display96x16x1StringDraw("press select", 0, 1);
//
// Enable the GPIO pin to read the select button.
//
GPIODirModeSet(GPIO_PORTC_BASE, GPIO_PIN_4, GPIO_DIR_MODE_IN);
GPIOPadConfigSet(GPIO_PORTC_BASE, GPIO_PIN_4, GPIO_STRENGTH_2MA,
GPIO_PIN_TYPE_STD_WPU);
//
// Wait until the select button has been pressed.
//
while(GPIOPinRead(GPIO_PORTC_BASE, GPIO_PIN_4) != 0)
{
}
//
// Drain any data that may be in the UART fifo.
//
while(UARTCharsAvail(UART0_BASE))
{
UARTCharGet(UART0_BASE);
}
//
// Indicate that the boot loader is being called.
//
Display96x16x1StringDraw("awaiting update", 0, 1);
//
// Call the boot loader so that it will listen for an update on the UART.
//
(*((void (*)(void))(*(unsigned long *)0x2c)))();
//
// The boot loader should take control, so this should never be reached.
// Just in case, loop forever.
//
while(1)
{
}
}
