From 4c7e6af00cacab1d2bdc466310929d6840d6019a Mon Sep 17 00:00:00 2001 From: sowgro Date: Mon, 8 Sep 2025 10:21:02 -0400 Subject: Create working printf --- project/Core/Src/Homework/printf.c | 21 +++++++++++++++++++++ project/Core/Src/main.c | 8 ++++---- 2 files changed, 25 insertions(+), 4 deletions(-) create mode 100644 project/Core/Src/Homework/printf.c (limited to 'project/Core/Src') 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 +#include +#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() ; } -- cgit v1.2.3