天然气管道,贵州都市网,完美国际颜色代码
硬件说明：
如原理图所示，
103的pa10 pa11分别接cp2102usb转串口芯片的txd rxd引脚。cp2102芯片是将串口和电脑usb接口进行了转接，方便应用灵活。
片上串口驱动代码如下。
我要评论 1 #include "usart.h"
2 #include "stm32f10x_usart.h"
3
4 #if system_support_ucos
5 #include "includes.h" //ucos
6 #endif
7
8 #if 1
9 #pragma import(__use_no_semihosting)
10
11 struct __file
12 {
13 int handle;
14
15 };
16
17 file __stdout;
18 _sys_exit(int x)
19 {
20 x = x;
21 }
22
23 int fputc(int ch, file *f)
24 {
25 while(usart_getflagstatus(usart1,usart_flag_tc)==reset);
26 usart_senddata(usart1,(uint8_t)ch);
27 return ch;
28 }
29 #endif
30
31
32 #if en_usart1_rx
33 //´®¿ú1öð¶ï·þîñ³ìðò
34 //×¢òâ,¶áè¡usartx->sräü±üãâäªãûæäãîµä´íîó
35 u8 usart_rx_buf[usart_rec_len]; //½óêõ»º³å,×î´óusart_rec_len¸ö×ö½ú.
36
37
38
39 u16 usart_rx_sta=0; //receiving status marker
40
41 void usart1_irqhandler(void)
42 {
43
44 u8 res;
45 #ifdef os_critical_method
46 osintenter();
47 #endif
48 if(usart_getitstatus(usart1, usart_it_rxne) != reset) //½óêõöð¶ï(½óêõµ½µäêý¾ý±øðëêç0x0d 0x0a½áî²)
49 {
50 res =usart_receivedata(usart1);//(usart1->dr); //¶á衽óêõµ½µäêý¾ý
51
52 if((usart_rx_sta&0x8000)==0)//½óêõî´íê³é
53 {
54 if(usart_rx_sta&0x4000)//½óêõµ½áë0x0d
55 {
56 if(res!=0x0a)usart_rx_sta=0;//½óêõ´íîó,öøð⿪ê¼
57 else usart_rx_sta|=0x8000; //½óêõíê³éáë
58 }
59 else //»¹ã»êõµ½0x0d
60 {
61 if(res==0x0d)usart_rx_sta|=0x4000;
62 else
63 {
64 usart_rx_buf[usart_rx_sta&0x3fff]= res;
65 usart_rx_sta++;
66 if(usart_rx_sta>(usart_rec_len-1))usart_rx_sta=0;//½óêõêý¾ý´íîó,öøð⿪꼽óêõ
67 }
68 }
69 }
70
71 }
72 #ifdef os_critical_method
73 osintexit();
74 #endif
75 }
76 #endif
77
78 //a11 rx a10 tx
79
80 void uart_init()
81 {
82
83
84 gpio_inittypedef gpio_initstructure;
85 usart_inittypedef usart_initstructure;
86 nvic_inittypedef nvic_initstructure;
87
88 rcc_apb2periphclockcmd(rcc_apb2periph_usart1|rcc_apb2periph_gpioa, enable); //ê¹äüusart1£¬gpioaê±öó
89 usart_deinit(usart1); //¸´î»´®¿ú1
90
91 gpio_initstructure.gpio_pin = gpio_pin_10; //pc.10
92 gpio_initstructure.gpio_speed = gpio_speed_50mhz;
93 gpio_initstructure.gpio_mode = gpio_mode_af_pp; //¸´óãíæíìêä³ö
94 gpio_init(gpioa, &gpio_initstructure); //³õê¼»¯pa9
95
96
97 gpio_initstructure.gpio_pin = gpio_pin_11;
98 gpio_initstructure.gpio_mode = gpio_mode_in_floating;//¸¡¿õêäèë
99 gpio_init(gpioa, &gpio_initstructure); //³õê¼»¯pa10
100 usart_initstructure.usart_baudrate = 9600;//ò»°ãéèöãîª9600;
101 usart_initstructure.usart_wordlength = usart_wordlength_8b;//×ö³¤îª8î»êý¾ý¸ñê½
102 usart_initstructure.usart_stopbits = usart_stopbits_1;//ò»¸öí£ö¹î»
103 usart_initstructure.usart_parity = usart_parity_no;//îþææå¼ð£ñéî»
104 usart_initstructure.usart_hardwareflowcontrol = usart_hardwareflowcontrol_none;//îþó²¼þêý¾ýá÷¿øöæ
105 usart_initstructure.usart_mode = usart_mode_rx | usart_mode_tx; //êõ·¢ä£ê½
106
107 usart_init(usart1, &usart_initstructure); //³õê¼»¯´®¿ú
108 #if en_usart1_rx //èç¹ûê¹äüáë½óêõ
109 //usart1 nvic åäöã
110 nvic_initstructure.nvic_irqchannel = usart1_irqn;
111 nvic_initstructure.nvic_irqchannelpreemptionpriority=3 ;//çàõ¼óåï輶3
112 nvic_initstructure.nvic_irqchannelsubpriority = 3; //×óóåï輶3
113 nvic_initstructure.nvic_irqchannelcmd = enable; //irqí¨µàê¹äü
114 nvic_init(&nvic_initstructure); //¸ù¾ýö¸¶¨µä²îêý³õê¼»¯vic¼ä´ææ÷
115
116 usart_itconfig(usart1, usart_it_rxne, enable);//¿ªæôöð¶ï
117 #endif
118 usart_cmd(usart1, enable); //ê¹äü´®¿ú
119
120 }
1 #ifndef __usart_h 2 #define __usart_h 3 #include "sys.h" 4 #include "stdio.h" 5 6 ////////////////////////////////////////////////////////////////////////////////// 7 #define usart_rec_len 200 8 #define en_usart1_rx 1 9 10 extern u8 usart_rx_buf[usart_rec_len]; 11 extern u16 usart_rx_sta; 12 13 void uart_init(); 14 15 #endif
1 #include "sys.h"
2 #include "usart.h"
3 #include "delay.h"
4
5 #define led0 paout(8)// ds0
6 #define led1 pbout(1)// ds1
7 #define led2 pbout(3)// ds1
8 #define led3 paout(11)// ds1
9
10 int main(void)
11 {
12
13 u8 t=0;
14 u8 y=0;
15 stm32_clock_init(9);
16 delay_init(72);
17 uart_init();
18
19 while(1)
20 {
21 printf("t999:%d\n",t);
22 delay_ms(1000);
23 t++;
24 if(y ==4)y=0;
25 switch(y)
26 {
27 case 0: led0 = 1;led1 =0; led2 =0; led3=0;break;
28 case 1: led1 = 1;led0 =0; led2 =0; led3=0; break;
29 case 2: led2 = 1;led0 =0; led1 =0; led3=0;break;
30 case 3: led3 = 1;led1 =0; led0 =0; led2=0;break;
31 }
32 y++;
33 }
34
35 return 0;
36 }
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