方式一
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- #include "stdio.h" `* B4 n- a0 v6 R4 o2 M, w
- /* USER CODE END Includes */0 K5 J9 M* G9 x( @( V( I$ a6 G
; R" g2 i) d W% }" ~6 d- /* Private typedef -----------------------------------------------------------*/
. u( Q$ F: S/ { - /* USER CODE BEGIN PTD */
6 D5 H6 o* @+ m. Z! m1 D# n1 ?5 [ - #ifdef __GNUC__
* ~% k) m9 G; k0 o, g# E! s - #define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
8 q2 r5 g$ a: ^: z3 t5 _/ E - #else0 ]2 |% E; k! ]5 U4 |" x7 B
- #define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f): ]& }# [$ ^* X+ O( a. C4 Z6 R' `9 U
- #endif% v% _! M2 j+ Y5 k: ]
- PUTCHAR_PROTOTYPE
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& e& F7 a) I9 }; B - //此处用的是USART2' ]$ |# b6 |' `
- //你在使用时仅仅需要把’USART2‘改成你的串口就可以了
, a3 | X+ o3 V# T* L - while ((USART2->SR & 0X40) == 0);
" r) [, V. m) ^! M e - USART2->DR = (uint8_t) ch;' \9 _2 L$ N$ ^6 _- I
- return ch;
* q" c' ~* s% v, a# l - }
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方式二
1 M2 E) v6 _5 L' ~% w) @- #include "stdio.h"//别忘了% f0 b, j9 E2 V e+ G1 ?, Q# z
- 4 |# D8 r& |3 F$ n: z
- #ifdef __GNUC__
2 h# K, H7 y6 V+ n9 M$ F$ b. Z - #define PUTCHAR_PROTOTYPE int __io_putchar(int ch)( b6 Q! O J2 c2 x- d6 J4 k
- #else
. A: r- |! Y, |% g - #define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
7 M+ e- w: D8 P, B6 M4 H7 u - #endif
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- PUTCHAR_PROTOTYPE
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- //同样USART2改为你的串口1 h3 [( L# A2 n1 \7 _9 N f! M
- HAL_UART_Transmit(&huart2, (uint8_t*)&ch,1,HAL_MAX_DELAY);3 Z$ E$ A, w* o# [
- return ch;2 r `* ~" W9 h$ B( Y
- }
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打印浮点数据如何操作?
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8 d1 j: g+ S+ P# C( P, f! V4 W) p1、右键->属性- @) o6 b! F0 a- P0 F+ N: o
2、设置
; y+ S/ g: B+ X7 T3 k3、Miscellaneous
5 a" l% M$ G3 J+ i6 \$ x- Z% S/ @4、输入 -u_printf_float/ x: H% V0 Q; j3 c, z7 d1 B0 B: o
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