测试串口usart1的printf输出。
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' z1 f- b5 c0 L一、硬件部分
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( t; ?, f" ]; r1 ^$ L1 H; R1.1、电路图串口部分
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" s B3 r# V; O" D+ A板载仿真器上的虚拟串口连接到开发板的PE5和PE6引脚。# i& R; N! p4 z. Z
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1.2、串口端口映射2 N0 [5 u) k$ j5 Y
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7 l. i( S" E9 \; L1 i$ ?- z二、程序部分6 `# t% e/ ?' K. f3 @
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2.1、usart.c4 k+ O4 Q+ l. P/ X8 Z2 Q6 ~
- #include "main.h"
2 T# ^* Z; q. q" \3 v6 a - #include "usart/usart.h"
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D) L" T5 I1 T% }# S- e7 }" Y Z2 e" ?- UART_HandleTypeDef g_usart1_handle;
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5 F3 j# t4 G( S6 s+ U1 r5 Y' ]8 Q/ H- int fputc(int ch, FILE *f)
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+ N$ b0 U Q' a4 c$ e - while ((USART_UX->ISR & 0X40) == 0);
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- USART_UX->TDR = (uint8_t)ch;
5 k1 O$ O2 s2 i! G1 A - return ch;3 l# z4 U8 `8 c( C
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9 n7 V1 w6 z" q8 J [- void usart_init(uint32_t baudrate)
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- GPIO_InitTypeDef gpio_init_struct;
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- USART_UX_CLK_ENABLE();
, f1 y: B/ S! B: K- \ - USART_TX_GPIO_CLK_ENABLE();
; _% Z" @7 x4 M8 f; |, r - USART_RX_GPIO_CLK_ENABLE(); % N0 \( `2 Y: Y$ y, g. u
- gpio_init_struct.Pin = USART_TX_GPIO_PIN; + G% F" b8 V4 X+ S# x, C
- gpio_init_struct.Mode = GPIO_MODE_AF_PP; m, p1 D* ]! J% m5 K* H; W
- gpio_init_struct.Pull = GPIO_PULLUP;
$ _7 ^7 f/ W2 u; x$ U- Q! A - gpio_init_struct.Speed = GPIO_SPEED_FREQ_HIGH;
; D* G9 I) O# }1 ^& _; p/ i - gpio_init_struct.Alternate = USART_TX_GPIO_AF;
" A4 W3 j# a0 u: R' G& i1 ] - HAL_GPIO_Init(USART_TX_GPIO_PORT, &gpio_init_struct);
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- gpio_init_struct.Pin = USART_RX_GPIO_PIN;
! o$ s" _0 j: w, v - gpio_init_struct.Alternate = USART_RX_GPIO_AF;
5 |5 \! u: u. E7 p* X8 ~ - HAL_GPIO_Init(USART_RX_GPIO_PORT, &gpio_init_struct);
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- g_usart1_handle.Instance = USART_UX;
* n% f' i% I' ?" _0 n4 M$ k - g_usart1_handle.Init.BaudRate = baudrate;
' }; s" b4 L$ Y9 z4 P) D. k - g_usart1_handle.Init.WordLength = UART_WORDLENGTH_8B;
: n; N( d( r% w, o+ h% t% r& J - g_usart1_handle.Init.StopBits = UART_STOPBITS_1; ! e1 o+ n, o+ E4 I% D# m
- g_usart1_handle.Init.Parity = UART_PARITY_NONE;
" U% X4 w' h* ^& O+ f5 r - g_usart1_handle.Init.HwFlowCtl = UART_HWCONTROL_NONE;
# P* q0 p0 W# a3 l0 B$ ]- l - g_usart1_handle.Init.Mode = UART_MODE_TX_RX;
: A: b# a, c; z! J, d. [( x9 q - HAL_UART_Init(&g_usart1_handle);
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2.2、usart.h- g3 o4 x4 {$ M1 u' Y5 U
- #ifndef _USART_H) e/ N4 j6 l( ]
- #define _USART_H
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- #include "stdio.h"* j( V T% T8 F7 Z2 h
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- #define USART_TX_GPIO_PORT GPIOE
* Y" F4 n# B8 L; A f7 l4 d! F - #define USART_TX_GPIO_PIN GPIO_PIN_5) a O2 [5 u- C" S) E& w- g+ l
- #define USART_TX_GPIO_AF GPIO_AF7_USART1
8 a# ^9 u* F# y) [ - #define USART_TX_GPIO_CLK_ENABLE() do{ __HAL_RCC_GPIOE_CLK_ENABLE(); }while(0) , e# U# o# ?7 x8 w6 m9 _8 M7 k# w
2 c4 I, L' F& ? X$ W: ?+ T5 n- #define USART_RX_GPIO_PORT GPIOE
, G- G: R7 Y2 R- n - #define USART_RX_GPIO_PIN GPIO_PIN_66 K: `8 D& i# u
- #define USART_RX_GPIO_AF GPIO_AF7_USART19 H r" _: a( Y: @
- #define USART_RX_GPIO_CLK_ENABLE() do{ __HAL_RCC_GPIOE_CLK_ENABLE(); }while(0) - G! M+ G& U) E. y: v# p7 J( ]
: t, v0 p" k9 Z4 B- #define USART_UX USART1
: z1 v; x8 E5 ^) `% A - #define USART_UX_CLK_ENABLE() do{ __HAL_RCC_USART1_CLK_ENABLE(); }while(0) : O) s. C" c4 O8 ^: ]
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- void usart_init(uint32_t baudrate);
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- #endif
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2.3、main.c
8 U9 H& B$ P. a! ?- int main(void)5 O0 m; J. f, ^
- {
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- X- v A5 x& u( F" q$ p }+ y0 H( Q* ~- /* USER CODE BEGIN 1 */+ v& V7 H: C! M' ]- d
$ `; \* c2 u+ S8 G4 S" C- /* USER CODE END 1 */, d2 V8 g2 Y& ?
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- /* MCU Configuration--------------------------------------------------------*/9 D0 w3 ?# U: a8 v+ s5 M
- HAL_Init();
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/ t. `0 A- o6 k- /* USER CODE BEGIN Init */
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- /* USER CODE END Init */
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- /* Configure the system clock */
6 ]9 h1 f% q8 E8 a) g - SystemClock_Config();6 S) U p! x9 h8 h7 X
9 x7 {* A( [) h- /* Configure the peripherals common clocks */
0 B9 w0 B$ H# x' n) l - PeriphCommonClock_Config();
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- /* USER CODE BEGIN SysInit */5 j+ b1 ?/ N% m6 q5 J. E, ]
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- /* USER CODE END SysInit */
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- /* Initialize all configured peripherals */4 y2 ?% ^; c) X# k
- // MX_GPIO_Init();
, P1 ~4 C7 P4 y' i7 Z - // MX_ADC1_Init();
" g) R8 W" g: y1 J - // MX_CSI_Init();
- ~0 n) e+ M4 I( i4 U$ P* v - // MX_I2C1_Init();$ G, a! H% s3 e2 R* }
- // MX_I2C2_Init();' I# S: s1 U) r Q& `( J5 J
- // MX_ICACHE_Init();& x2 ?' t0 M% H5 \1 w
- // MX_MDF1_Init();
s8 h6 y$ e3 Z3 m7 w- \/ R - // MX_SAI1_Init();3 K+ m8 |( M5 N% a2 Q! A
- // MX_SDMMC2_SD_Init();
$ S, \9 L1 h. |8 v2 L7 z) @ - // MX_UCPD1_Init();% K( O7 Z" ^5 P, ?" p
- // MX_USART1_UART_Init();
" y# x! b- O Z1 T - // MX_USB1_OTG_HS_USB_Init();
0 q+ ^) d5 k9 l5 l4 x5 h ~ - // MX_USB2_OTG_HS_HCD_Init();4 e# z6 Z( l& K, d1 P! W" c
- // MX_XSPI1_Init(); Z( e- \& a5 [; U
- // MX_XSPI2_Init();% s- S5 J( h7 R' t, T2 J2 C. s8 A
- /* USER CODE BEGIN 2 *// m) K/ i8 w+ t7 D+ I
- usart_init(115200);5 z7 N9 \* o2 M" N2 ]/ ~* }5 s
- init_led();
* e- `! H2 d! @/ I* x$ Y! y W - /* USER CODE END 2 */4 t* c7 l9 r: K+ b- i
! ~7 }$ M" }( Z8 t) f- /* Infinite loop */
6 Q0 e% ]9 [: q+ C! Z+ ` - /* USER CODE BEGIN WHILE */
% G% n7 }" l; m) B0 r% R4 `3 m - while (1)
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9 C5 P) W% |, K# X! Y* {5 b - /* USER CODE END WHILE */. p- t3 n- `( Y& t6 l
4 {' J: q t2 `9 r( A- /* USER CODE BEGIN 3 */! p- S4 j$ z( W4 R: x+ f Y
- printf(" usart1 printf test! \r\n");
; y+ k- o- e% C$ U$ p - led1_tog();( G$ K8 }7 N9 \" l, }" B& S
- led2_tog(); L( q' [1 Q; l5 h5 W1 Q r3 x
- //HAL_GPIO_TogglePin(LED1_GPIO_Port, LED1_Pin);7 v9 M5 F- y1 U g2 J7 @. @
- //HAL_GPIO_TogglePin(LED2_GPIO_Port, LED2_Pin);
" k0 z0 e- S( b- w9 s3 {- B0 R - /* Insert delay 200 ms */. ~7 j9 C; m4 _! i) |! U F, F
- HAL_Delay(200);9 }3 [+ C. @+ o& d ]
- }
4 t/ \& G' I4 p - /* USER CODE END 3 */
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( X* a8 g! g, C/ X& `三、运行结果
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9 Z! G" B4 F# n* w* t仿真运行后,串口输出
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0 L- f7 k; s$ S& r" Y% K# q四、附件
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1 w- ?9 K3 l7 \: ]. |* \源代码:
stm32n6570_cubemx_prj_printf.rar
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