67 lines
1.6 KiB
C
67 lines
1.6 KiB
C
#include <stdint.h>
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#include <stdbool.h>
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#include "tm4c123gh6pm.h"
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void UART7_init(void);
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void UART7_write(char data);
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char UART7_read(void);
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void PortE_init(void);
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void LED_Control(char);
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int main(void)
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{
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char recievedchar;
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UART7_init(); // UART 7 Initialization
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PortE_Init(); // PORT E Initialization
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while(1)
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{
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recievedchar = UART7_read(); // Read a character from the UART
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UART0_Write(receivedChar); // Give the character back to UART
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LED_Control(receivedChar); // LED Control based on UART input
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}
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}
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void UART7_init(void)
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{
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SYSCTL_RCGCUART_R |= 0x80; // Enable clock to UART7
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SYSCTL_RCGCGPIO_R |= 0x10 // Enable clock to Port E for UART7
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// UART7 TX/RX on PE1/PE0
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GPIO_PORTE_AFSEL_R |= 0x03; // Enable alt function on PE0, PE1
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GPIO_PORTE_DEN_R |= 0x03; // Enable digital on PE0, PE1
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GPIO_PORTE_PCTL_R |= 0x11; // Configure PE0 and PE1 for UART
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GPIO_PORTE_AMSEL_R &= ~0x03; // Disable analog on PE0, PE1
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// UART7 initialization
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UART0_CTL_R &= ~0x01; // Disable UART0
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UART0_IBRD_R = 104; // Baud rate = 9600, Integer Baud Rate Divisor
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UART0_FBRD_R = 11; // Fractional Baud Rate Divisor
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UART0_LCRH_R = 0x70; // 8-bit, no parity, 1-stop bit, enable FIFOs
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UART0_CTL_R |= 0x301; // Enable UART0, TX, RX
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}
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char UART0_Read(void) {
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while((UART0_FR_R & 0x10) != 0); // Wait until RXFE is 0 (receive FIFO not empty)
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return UART0_DR_R & 0xFF; // Read the received character
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}
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