STM32单片机RS485通讯程序资料 -

#include "./SYSTEM/sys/sys.h"
#include "./SYSTEM/usart/usart.h"
#include "./SYSTEM/delay/delay.h"
#include "./USMART/usmart.h"
#include "./BSP/LED/led.h"
#include "./BSP/LCD/lcd.h"
#include "./BSP/KEY/key.h"
#include "./BSP/RS485/rs485.h"
int main(void)
{
uint8_t key;
uint8_t i = 0, t = 0;
uint8_t cnt = 0;
uint8_t rs485buf[5];
HAL_Init(); /* 初始化HAL库 */
sys_stm32_clock_init(RCC_PLL_MUL9); /* 设置时钟, 72Mhz */
delay_init(72); /* 延时初始化 */
usart_init(115200); /* 串口初始化为115200 */
usmart_dev.init(72); /* 初始化USMART */
led_init(); /* 初始化LED */
lcd_init(); /* 初始化LCD */
key_init(); /* 初始化按键 */
rs485_init(9600); /* 初始化RS485 */
lcd_show_string(30, 50, 200, 16, 16, "STM32", RED);
lcd_show_string(30, 70, 200, 16, 16, "RS485 TEST", RED);
lcd_show_string(30, 90, 200, 16, 16, "ATOM@ALIENTEK", RED);
lcd_show_string(30, 110, 200, 16, 16, "KEY0:Send", RED); /* 显示提示信息 */
lcd_show_string(30, 130, 200, 16, 16, "Count:", RED); /* 显示当前计数值 */
lcd_show_string(30, 150, 200, 16, 16, "Send Data:", RED); /* 提示发送的数据 */
lcd_show_string(30, 190, 200, 16, 16, "Receive Data:", RED);/* 提示接收到的数据 */
while (1)
{
key = key_scan(0);
if (key == KEY0_PRES) /* KEY0按下,发送一次数据 */
{
for (i = 0; i < 5; i++)
{
rs485buf[i] = cnt + i; /* 填充发送缓冲区 */
lcd_show_xnum(30 + i * 32, 170, rs485buf[i], 3, 16, 0X80, BLUE); /* 显示数据 */
}
rs485_send_data(rs485buf, 5); /* 发送5个字节 */
}
rs485_receive_data(rs485buf, &key);
if (key) /* 接收到有数据 */
{
if (key > 5) key = 5; /* 最大是5个数据. */
for (i = 0; i < key; i++)
{
lcd_show_xnum(30 + i * 32, 210, rs485buf[i], 3, 16, 0X80, BLUE); /* 显示数据 */
}
}
t++;
delay_ms(10);
if (t == 20)
{
LED0_TOGGLE(); /* LED0闪烁, 提示系统正在运行 */
t = 0;
cnt++;
lcd_show_xnum(30 + 48, 130, cnt, 3, 16, 0X80, BLUE); /* 显示数据 */
}
}
}

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