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49 lines
728 B
C
49 lines
728 B
C
/*
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* printf2.c
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*
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* Created on: Mar 1, 2016
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* Author: peter
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*/
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#include "stm32l4xx_hal.h"
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#include <stdio.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include "config.h"
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void USART_putc(USART_TypeDef* USARTx, char c)
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{
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while ( !(USARTx->ISR & USART_ISR_TXE) )
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;
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USARTx->TDR = c;
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}
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void USART_puts(USART_TypeDef* USARTx, const char *s)
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{
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for ( int i = 0; s[i] != 0; ++i )
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USART_putc(USARTx, s[i]);
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}
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char __buffer[128];
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#if ENABLE_VAR_ARGS
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void printf2(const char *format, ...)
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{
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va_list list;
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va_start(list, format);
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vsnprintf(__buffer, sizeof __buffer, format, list);
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va_end(list);
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USART_puts(USART1, __buffer);
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}
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#else
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void printf2(const char *s)
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{
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USART_puts(USART1, s);
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}
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#endif
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