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Group21_Lab07
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This commit is contained in:
Sanyog Nevase Nevase 2024-10-10 20:27:33 +05:30
parent 73455674fa
commit b5e4501940
1 changed files with 44 additions and 53 deletions
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97
main.c
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@ -12,122 +12,113 @@ void GPIO_PORT_F_init(void)
GPIO_PORTF_PUR_R = 0x11; // PORTF PF0 and PF4 IS PULLED UP GPIO_PORTF_PUR_R = 0x11; // PORTF PF0 and PF4 IS PULLED UP
NVIC_EN0_R |= 1 << 30; NVIC_EN0_R |= 1 << 30;
GPIO_PORTF_IS_R = 0x00; // Make it edge-sensitive GPIO_PORTF_IS_R = 0x00; // Make it edge-sensitive
GPIO_PORTF_IBE_R = 0x00; // Trigger on one edge GPIO_PORTF_IBE_R = 0x00; // Trigger on one edge
GPIO_PORTF_IEV_R = 0x00; // Falling edge event GPIO_PORTF_IEV_R = 0x00; // Falling edge event
GPIO_PORTF_IM_R |= 0x11; // Unmask interrupts for PF0 and PF4 GPIO_PORTF_IM_R |= 0x11; // Unmask interrupts for PF0 and PF4
} }
void GPIO_PORT_B_init(void) void GPIO_PORT_B_init(void)
{ {
SYSCTL_RCGCGPIO_R |= 0x02; // Enable clock to GPIOB SYSCTL_RCGCGPIO_R |= 0x02; // Enable clock to GPIOB
SYSCTL_RCGCUART_R |= 0x02; // Enable UART1 clock SYSCTL_RCGCUART_R |= 0x02; // Enable UART1 clock
GPIO_PORTB_DEN_R |= 0x03; // Enable PB0, PB1 as digital GPIO_PORTB_DEN_R |= 0x03; // Enable PB0, PB1 as digital
GPIO_PORTB_AFSEL_R |= 0x03; // Enable alternate function on PB0, PB1 GPIO_PORTB_AFSEL_R |= 0x03; // Enable alternate function on PB0, PB1
GPIO_PORTB_PCTL_R = (GPIO_PORTB_PCTL_R & 0xFFFFFF00) | 0x00000011; // Set PB0, PB1 for UART GPIO_PORTB_PCTL_R = (GPIO_PORTB_PCTL_R & 0xFFFFFF00) | 0x00000011; // Set PB0, PB1 for UART
UART1_CTL_R &= ~0x01; // Disable UART1 during setup UART1_CTL_R &= ~0x01; // Disable UART1 during setup
UART1_IBRD_R = 104; // Set integer part of baud rate (for 9600 baud at 16 MHz clock) UART1_IBRD_R = 104; // Set integer part of baud rate (for 9600 baud at 16 MHz clock)
UART1_FBRD_R = 11; // Set fractional part of baud rate UART1_FBRD_R = 11; // Set fractional part of baud rate
UART1_LCRH_R = 0x62; // 8-bit, odd parity, 1 stop bit UART1_LCRH_R = 0x62; // 8-bit, odd parity, 1 stop bit
UART1_CC_R = 0x00; // Use system clock UART1_CC_R = 0x00; // Use system clock
UART1_CTL_R |= 0x301; // Enable UART1, RX, and TX UART1_CTL_R |= 0x301; // Enable UART1, RX, and TX
} }
void UART1_WRITE(char data) void UART1_WRITE(char data)
{ {
while (UART1_FR_R & 0x20); // Wait until TX FIFO is not full while (UART1_FR_R & 0x20); // Wait until TX FIFO is not full
UART1_DR_R = data; // Write data to UART data register UART1_DR_R = data; // Write data to UART data register
} }
char UART1_READ(void) char UART1_READ(void)
{ {
while (UART1_FR_R & 0x10); // Wait until RX FIFO is not empty while (UART1_FR_R & 0x10); // Wait until RX FIFO is not empty
return (char)UART1_DR_R; // Return received data return (char)UART1_DR_R; // Return received data
} }
#define STCTRL *((volatile uint32_t *) 0xE000E010) // control and status #define STCTRL *((volatile uint32_t *) 0xE000E010) // control and status
#define STRELOAD *((volatile uint32_t *) 0xE000E014) // reload value #define STRELOAD *((volatile uint32_t *) 0xE000E014) // reload value
#define STCURRENT *((volatile uint32_t *) 0xE000E018) // current value #define STCURRENT *((volatile uint32_t *) 0xE000E018) // current value
#define CLOCK_HZ 16000000 // CLOCK FREQUENCY OF EK-TM4C123GXL #define CLOCK_HZ 16000000 // CLOCK FREQUENCY
#define SYSTICK_RELOAD_VALUE(us) ((CLOCK_HZ / 1000000) * (us) - 1) // SYSTICK RELOAD VALUE #define SYSTICK_RELOAD_VALUE(us) ((CLOCK_HZ / 1000000) * (us) - 1) // SYSTICK RELOAD VALUE
void systick_setting(void) // SYSTICK SETUP FUNCTION
void systick_setting(void) // SYSTICK SETUP FUNCTION
{ {
STRELOAD = SYSTICK_RELOAD_VALUE(1000); // RELOAD VALUE FOR 1ms STRELOAD = SYSTICK_RELOAD_VALUE(1000); // RELOAD VALUE FOR 1ms
STCTRL |= (1 << 0) | (1 << 2); // Enable SysTick with system clock STCTRL |= (1 << 0) | (1 << 2); // Enable SysTick with system clock
STCURRENT = 0; // Clear current value STCURRENT = 0; // Clear current value
} }
void delay(int us) //DEFINING DELAY FUNCTION void delay(int us) // DEFINING DELAY FUNCTION
{ {
STRELOAD = SYSTICK_RELOAD_VALUE(us); // RELOAD VALUE FOR REQUIRED DELAY STRELOAD = SYSTICK_RELOAD_VALUE(us); // RELOAD VALUE FOR REQUIRED DELAY
STCURRENT = 0; // Clear STCURRENT STCURRENT = 0; // Clear STCURRENT
STCTRL |= (1 << 0) | (1 << 2); // Enable SysTick STCTRL |= (1 << 0) | (1 << 2); // Enable SysTick
while ((STCTRL & (1 << 16)) == 0); // Wait until flag is set while ((STCTRL & (1 << 16)) == 0); // Wait until flag is set
STCTRL &= 0x0; // Stop the timer STCTRL &= 0x0; // Stop the timer
} }
void STATUS_LED(char received_data) void STATUS_LED(char received_data)
{ {
if (received_data == 0xAA) if (received_data == 0xAA)
{ {
GPIO_PORTF_DATA_R |= 0x08; // Turn on Green LED (PF3) GPIO_PORTF_DATA_R |= 0x08; // Turn on Green LED (PF3)
GPIO_PORTF_DATA_R &= ~0x04; // Turn off Blue LED (PF2) GPIO_PORTF_DATA_R &= ~0x04; // Turn off Blue LED (PF2)
} }
else if (received_data == 0xF0) else if (received_data == 0xF0)
{ {
GPIO_PORTF_DATA_R |= 0x04; // Turn on Blue LED (PF2) GPIO_PORTF_DATA_R |= 0x04; // Turn on Blue LED (PF2)
GPIO_PORTF_DATA_R &= ~0x08; // Turn off Green LED (PF3) GPIO_PORTF_DATA_R &= ~0x08; // Turn off Green LED (PF3)
} }
else else
{ {
GPIO_PORTF_DATA_R |= 0x02; GPIO_PORTF_DATA_R |= 0x02;
} }
//delay(500000);
//GPIO_PORTF_DATA_R &= 0x00; // Turn on Green LED (PF3)
} }
void GPIOF_interruptHandler(void) // Interrupt handler for GPIO Port F void GPIOF_interruptHandler(void) // Interrupt handler for GPIO Port F
{ {
//delay(200000); // Debounce delay if (GPIO_PORTF_RIS_R & 0x10) // Check if PF4 caused the interrupt
// Check PF4 (Switch 2)
if (GPIO_PORTF_RIS_R & 0x10) // Check if PF4 caused the interrupt
{ {
//GPIO_PORTF_DATA_R |= 0x02; // Toggle RED LED (PF1)
//delay(500000);
UART1_WRITE(0xF0); UART1_WRITE(0xF0);
STATUS_LED(UART1_READ()); STATUS_LED(UART1_READ());
//GPIO_PORTF_DATA_R = 0x00; // Toggle RED LED (PF1) GPIO_PORTF_ICR_R = 0x10; // Clear interrupt flag for PF4
GPIO_PORTF_ICR_R = 0x10; // Clear interrupt flag for PF4
} }
// Check PF0 (Switch 1) if (GPIO_PORTF_RIS_R & 0x01) // Check if PF0 caused the interrupt
if (GPIO_PORTF_RIS_R & 0x01) // Check if PF0 caused the interrupt
{ {
//GPIO_PORTF_DATA_R |= 0x04; // Toggle RED LED (PF1)
//delay(500000);
UART1_WRITE(0xAA); UART1_WRITE(0xAA);
//GPIO_PORTF_DATA_R = 0x00;
STATUS_LED(UART1_READ()); STATUS_LED(UART1_READ());
GPIO_PORTF_ICR_R = 0x01; // Clear interrupt flag for PF0 GPIO_PORTF_ICR_R = 0x01; // Clear interrupt flag for PF0
} }
} }
int main(void) // MAIN FUNCTION
int main(void) // MAIN FUNCTION
{ {
GPIO_PORT_F_init(); // GPIO INITIALISATION FUNCTION GPIO_PORT_F_init(); // GPIO INITIALISATION FUNCTION
GPIO_PORT_B_init(); GPIO_PORT_B_init();
systick_setting(); // SYSTICK SETUP systick_setting(); // SYSTICK SETUP
while (1) while (1)
{ {
STATUS_LED(UART1_READ()); STATUS_LED(UART1_READ());