lcd_uart_171.c

软件模拟串口收发

/*
项目：软件串口LCD显示器
芯片：HR7P171F8S1 内部16M
功能：
软件读取串口数据
显示LCD数据码
发送端字符串数据格式
senfm
n,m为高位和低位显示的十进制值对应的字符串
*/

#include <hic.h>
#include "ir.h"

//输入
#define KEY_1		PA1
#define KEY_2		PA0

//输出
#define	LED_A		PB0			//数码管脚位
#define	LED_B		PB1
#define	LED_C		PB2
#define	LED_D		PB3
#define	LED_E		PB4
#define	LED_F		PB5
#define	LED_G		PB6
#define LED_DP		PB7

#define	LED_D1		PC0			//数码管共阳极
#define	LED_D2		PA7
#define	LED_D3		PA6
#define	LED_D4		PC1

#define UART_TX		PA2			//软件串口输出
#define UART_RX		PA4			//软件串口输入

#define LED_ON		1
#define LED_OFF		0

#define UART_LOW	0
#define UART_HIGH	1

#define KEY_PRESS_COUNT		20
#define	KEY_DOWN			0
#define	KEY_UP				1


uint8 digi_index;				//数码管位数值
uint8 single_digi;				//每一位数码管显示数值

uint8 delay_count;

uint8 lcd_buf_h;
uint8 lcd_buf_l;

uint8 ucc;
uint8 uci;
uint8 ucb[10];
uint8 ucbi;
uint8 rx_buf;

bool rx_start;
bool rx_valid;
bool rx_buf_end;

uint8 rx_user_flag;
uint8 rx_user_buf[8];
uint8 rx_user_index;

bool tx_end;
uint16 tx_buf;

uint8 key_count1;
uint8 key_count2;

uint8 key_value;		//位操作，从低到高，最多8个按键
uint8 key_value_old;

uint8 source_index;

void Clr_Ram_Asm()
{
	__asm{
	SECTION0
RAM_INI
	MOVI	0X20
	MOVA	IAA
CLR_SECTION0
	CLR		IAD
	INC		IAA,1
	JBS		IAA,7
	GOTO	CLR_SECTION0
	
	MOVI	0XA0
	MOVA	IAA
CLR_SECTION1
	CLR		IAD
	INC		IAA,1
	JBC		IAA,7
	GOTO	CLR_SECTION1
    };
}

void Init_Config()
{
	OSCC = 0B01110000;		//芯片内部晶振频率16M
	ACPC = 0x07;			//关闭模拟比较器
	
	PAT = 0B00111011;
	PBT = 0B00000000;
	PCT = 0B11111100;
	PA = 0B11000000;
	PB = 0B00000000;
	PC = 0B00000011;

	N_PAPU = 0B11111100;

	
	ADSEL = 0B11111111;
	
	BSET = 0x00;
	INTC0 = 0;
	T8N = 0;
	T8NIF = 0;
	T8NIE = 1;
	GIE_GIEH = 1;

	lcd_buf_h = 0x12;
	lcd_buf_l = 0x34;
}

void delay()
{
	while(delay_count)
	{
		__Asm CWDT;
		delay_count--;
	}
}

void show_lcd()
{	
	for(digi_index = 0; digi_index < 4; digi_index++)
	{
		PB = 0xFF;
		if(digi_index == 0)
		{
			LED_D1 = LED_ON;
			single_digi = (lcd_buf_h>>4)&0x0F;
		}
		else if(digi_index == 1)
		{
			LED_D2 = LED_ON;
			single_digi = lcd_buf_h&0x0F;
		}
		else if(digi_index == 2)
		{
			LED_D3 = LED_ON;
			single_digi = (lcd_buf_l>>4)&0x0F;
		}
		else if(digi_index == 3)
		{
			LED_D4 = LED_ON;
			single_digi = lcd_buf_l&0x0F;
		}
		delay_count = 200;

		if(single_digi == 0)
		{
			PB = 0B11000000;
		}
		else if(single_digi == 1)
		{
			PB = 0B11111001;
		}
		else if(single_digi == 2)
		{
			PB = 0B10100100;
		}
		else if(single_digi == 3)
		{
			PB = 0B10110000;
		}
		else if(single_digi == 4)
		{
			PB = 0B10011001;
		}
		else if(single_digi == 5)
		{
			PB = 0B10010010;
		}
		else if(single_digi == 6)
		{
			PB = 0B10000010;
		}
		else if(single_digi == 7)
		{
			PB = 0B11111000;
		}
		else if(single_digi == 8)
		{
			PB = 0B10000000;
		}
		else if(single_digi == 9)
		{
			PB = 0B10010000;
		}
		else if(single_digi == 10)		//A
		{
			PB = 0B10001000;
		}
		else if(single_digi == 11)		//b
		{
			PB = 0B10000011;
		}
		else if(single_digi == 12)		//C
		{
			PB = 0B11000110;
		}
		else if(single_digi == 13)		//d
		{
			PB = 0B10100001;
		}
		else if(single_digi == 14)		//E
		{
			PB = 0B10000110;
		}
		else if(single_digi == 15)		//F
		{
			PB = 0B10001110;
		}
		
		delay();
		LED_D1 = LED_OFF;
		LED_D2 = LED_OFF;
		LED_D3 = LED_OFF;
		LED_D4 = LED_OFF;
		delay_count = 2;
		delay();
	}
}

void scan_key_down()
{
	if(KEY_1 == KEY_DOWN)
	{
		key_count1++;
		if(key_count1 >= KEY_PRESS_COUNT)
		{
			key_count1 = KEY_PRESS_COUNT;
			key_value = 1;
		}
	}
	else
	{
		key_count1 = 0;
		key_value &= 0x0E;
	}
	if(KEY_2 == KEY_DOWN)
	{
		key_count2++;
		if(key_count2 >= KEY_PRESS_COUNT)
		{
			key_count2 = KEY_PRESS_COUNT;
			key_value = 2;
		}
	}
	else
	{
		key_count2 = 0;
		key_value &= 0x0D;
	}
	
	if(key_value_old != key_value)
	{
		key_value_old = key_value;
		
		if(0x01 == key_value)
		{
			source_index = 1;
		}
		else if(0x02 == key_value)
		{
			source_index = 2;
		}

		key_value = 0;
	}
}

/*
软件模拟串口发送数据
*/
void sw_uart_tx()
{
	if(tx_buf)
	{
		if(tx_buf & 0x0001)
		{
			UART_TX = 1;
		}
		else
		{
			UART_TX = 0;
		}
		tx_buf >>= 1;
	}
	else
	{
		tx_end = 1;
		UART_TX = 1;
	}
}

/*
开始发送数据
将tx_buf赋值，再调用这个函数
*/
void start_uart_send()
{
	if(tx_end == 1)
	{
		tx_buf <<= 1;
		tx_buf |= 0x0200;
		tx_end = 0;
	}
}

/*
中断定时器里一直调用这个函数
*/
void sw_uart_rx()
{
	//读取数据后用户没有读走，将不再接受新的数据
	if(rx_buf_end == 1)
		return;
	if(UART_RX == UART_LOW)
	{
		if(rx_start == 0)			//第1个低电平开始
		{
			rx_start = 1;
			uci = 0;
		}
		if(rx_start == 1)
		{
			if(ucc < 9)
			{
				ucb[uci] = (0x00|(ucb[uci]>>1));
			}
			if(ucc == 8)
			{
				ucc = 0;
				uci++;
			}
			ucc++;
		}
	}
	else
	{
		if(rx_start == 1)
		{
			if(ucc < 9)
			{
				ucb[uci] = (0x80|(ucb[uci]>>1));
			}
			if(ucc == 8)
			{
				ucc = 0;
				uci++;
			}
			ucc++;
		}
	}

	if(rx_start)
	{
		if(rx_valid)
		{
			if(uci == 9)
			{
				rx_start = 0;
				rx_buf = 0;
				for(ucbi = 1; ucbi < 9; ucbi++)
				{
					if((ucb[ucbi]&0x18) == 0x18)
					{
						rx_buf = 0x80|(rx_buf>>1);
					}
					else
					{
						rx_buf = 0x00|(rx_buf>>1);
					}
					ucb[ucbi] = 0;
				}
				rx_buf_end = 1;
			}
		}
		else
		{
			if(uci == 1)
			{
				if((((ucb[0]|0xE7)&0xff) == 0xE7))
				{
					rx_valid = 1;
				}
				else
				{
					rx_start = 0;
				}
			}
		}
	}
}



void isr() interrupt
{
	//T8中断处理程序
	if(T8NIE&&T8NIF)
 	{
		T8NIF = 0;
		T8N += 60;			//16M 50:105us

		//解码NEC红外遥控码
		ir_decode();
		
		//接受1200bps 8倍采样数据
		sw_uart_rx();
		
		//发送串口数据
		if(tx_end == 0)
			sw_uart_tx();
	}
}


void main()
{
	Clr_Ram_Asm();   //清RAM
	__Asm CWDT;
	Init_Config();

	while(1)
	{
		__Asm CWDT;
		scan_key_down();
		if(source_index == 0)				//显示串口发来的数据
		{
			if(rx_buf_end == 1)
			{
				rx_buf_end = 0;
				rx_user_buf[rx_user_index] = rx_buf;
				rx_user_index++;
				if(rx_buf == 115)					//'s'
				{
					rx_user_index = 0;
				}
			}
			if(rx_user_index >= 4)
			{
				rx_user_index = 0;
				if(rx_user_buf[0] == 101)			//'e'
				{
					lcd_buf_h = rx_user_buf[1];
					if(lcd_buf_h>100)
					{
						lcd_buf_h = lcd_buf_h - (lcd_buf_h/100)*100;
					}
				}
				if(rx_user_buf[2] == 102)			//'f'
				{
					lcd_buf_l = rx_user_buf[3];
					if(lcd_buf_l>100)
					{
						lcd_buf_l = lcd_buf_l - (lcd_buf_l/100)*100;
					}
				}
			}
		}
		else if(source_index == 1)
		{
			if(ir_valid == 1)
			{
				ir_valid = 0;
				lcd_buf_h = addrh;
				lcd_buf_l = addrl;
			}
		}
		else if(source_index == 2)
		{
			if(ir_valid == 1)
			{
				ir_valid = 0;
				lcd_buf_h = ir_keycode1;
				lcd_buf_l = ir_keycode2;
			}
		}

		show_lcd();
	}
}