init module06

2025-03-15 15:52:43 +01:00
parent 8365a79837
commit 92aa850fb4
7 changed files with 206 additions and 0 deletions
--- a/module06/ex00/uart.c
+++ b/module06/ex00/uart.c
@@ -0,0 +1,77 @@
+#include "header.h"
+
+// MACROS
+// USART
+#define USART_BAUDRATE		115200
+#define INPUT_SIZE			7
+
+// GLOBAL VARIABLES
+
+//
+// FUNCTIONS
+//
+void uart_init() {
+	UBRR0H = (unsigned char) (BAUD_PRESCALER(USART_BAUDRATE) >> 8);					// 20.11.5 : UBRRnL and UBRRnH – USART Baud Rate Registers
+	UBRR0L = (unsigned char) BAUD_PRESCALER(USART_BAUDRATE);
+	UCSR0C = DATA_EIGHT_BIT;														// 20.11.4 : set Frame Format
+	UCSR0B = TRANSMITTER_ENABLED;													// 20.11.3 : enable Receiver, Transmitter, and interrupts
+}
+
+// char uart_rx(void) {
+// 	while (!TEST(UCSR0A, RXC0));												// 20.11.2 : do nothing until there are unread data in the receive buffer (UDRn), (RXCn flag in UCSRnA register set to 1 when buffer has data)
+// 	return UDR0;																	// 20.11.1 : get data in buffer, UDRn – USART I/O Data Register (read and write)
+// }
+
+void uart_tx(char c) {
+	while (!TEST(UCSR0A, UDRE0));												// 20.11.2 : do nothing until UDRn buffer is empty, (UDREn flag in UCSRnA register set to 1 when buffer empty)
+	UDR0 = (unsigned char) c;														// 20.11.1 : Put data into buffer, UDRn – USART I/O Data Register (read and write)
+}
+
+void uart_printstr(const char* str) {
+	while (*str) {
+		uart_tx(*str);
+		str++;
+	}
+}
+
+void uart_printstr_endl(const char* str) {
+	uart_printstr(str);
+	uart_printstr("\r\n");
+}
+
+// ISR(USART_RX_vect) {																// Table 12-6 : we select the code for USART Receive
+// 	char received_char = UDR0;														// read received character
+// 	if (received_char == '\b' || received_char == 127) {							// if backspace is received
+// 		if (input_index <= 0) {
+// 			return;
+// 		}
+// 		if (input_index >= INPUT_SIZE) {
+// 			return;
+// 		}
+// 		remove_last_character();
+// 		input_index--;
+// 		uart_tx('\b');  // Move cursor back
+// 		uart_tx(' ');   // Erase the character on screen
+// 		uart_tx('\b');  // Move cursor back again
+// 	} else if (received_char == '\n' || received_char == '\r') {					// if enter is received
+// 		if (input_index != INPUT_SIZE) {
+// 			return;
+// 		}
+// 		set_color((char *)color_input);
+// 		reset_input();
+// 	} else {																		// any other character
+// 		if (input_index >= INPUT_SIZE) {
+// 			return;
+// 		}
+// 		if (!is_valid_color_input(received_char)) {
+// 			return;
+// 		}
+// 		fill_str(received_char);
+// 		uart_tx(received_char);
+// 		input_index++;
+// 	}
+// }
+
+// ISR(USART_TX_vect) {																// Table 12-6 : we select the code for USART Transmit
+// 	char received_char = UDR0;														// read received character
+// }