Create working printf

3 files changed, 38 insertions, 4 deletions

diff --git a/project/Core/Inc/Homework/printf.h b/project/Core/Inc/Homework/printf.h
new file mode 100644
index 0000000..48952dc
--- /dev/null
+++ b/project/Core/Inc/Homework/printf.h
@@ -0,0 +1,13 @@
+/*
+ * printf.h
+ *
+ *  Created on: Sep 5, 2025
+ *      Author: sowgro
+ */
+
+#ifndef INC_ACTIVITIES_PRINTF_H_
+#define INC_ACTIVITIES_PRINTF_H_
+
+int printf(const char *format, ...);
+
+#endif /* INC_ACTIVITIES_PRINTF_H_ */
diff --git a/project/Core/Src/Homework/printf.c b/project/Core/Src/Homework/printf.c
new file mode 100644
index 0000000..56216ad
--- /dev/null
+++ b/project/Core/Src/Homework/printf.c
@@ -0,0 +1,21 @@
+/*
+ * printf.c
+ *
+ *  Created on: Sep 5, 2025
+ *      Author: sowgro
+ */
+
+#include <stdio.h>
+#include <stdarg.h>
+#include "UART.h"
+#include "printf.h"
+
+char buffer[80];
+int printf(const char *format, ...) {
+	va_list args;
+	va_start(args, format);
+	int n = vsprintf(buffer, format, args);
+	va_end(args);
+	USART_Write(USART2, (unsigned char *) buffer, n);
+	return n;
+}
diff --git a/project/Core/Src/main.c b/project/Core/Src/main.c
index c2147cd..f8709f3 100644
--- a/project/Core/Src/main.c
+++ b/project/Core/Src/main.c
@@ -18,11 +18,11 @@ int main(void){
 	LED_Init();
 	UART2_Init();
 	
-	char buffer[64];
-	int n = sprintf(buffer, "Hello\n\r");
-	USART_Write(USART2, (unsigned char *) buffer, n);
+	int a = 1;
+	int b = 2;
+	printf("Hello %i %i \n\r", a, b);
 
 	// application run function
-//	run_demo() ;
+	//	run_demo() ;
 }