最近做了一个项目用到了HT1621,电路图+datasheet+code
HT1621B datasheet
#include "ht1621.h"
void ht1621_send_high_order_data(UCHAR data, UCHAR len)
{
UCHAR i;
for (i=0; i<len; i++)
{
if((data&0x80) == 0)
{
Set_Port_Val(HT_DATA, 0);
}
else
{
Set_Port_Val(HT_DATA, 1);
}
Set_Port_Val(HT_WR, 0);
Delay(4);
Set_Port_Val(HT_WR, 1);
data <<= 1;
}
}
void ht1621_send_low_order_data(UCHAR data, UCHAR len)
{
UCHAR i;
for (i=0; i<len; i++)
{
if((data&0x01) == 0)
{
Set_Port_Val(HT_DATA, 0);
}
else
{
Set_Port_Val(HT_DATA, 1);
}
Set_Port_Val(HT_WR, 0);
Delay(4);
Set_Port_Val(HT_WR, 1);
data >>= 1;
}
}
void ht1621_send_cmd(UCHAR command)
{
Set_Port_Val(HT_CS, 0);
ht1621_send_high_order_data(0x80, 4);
ht1621_send_high_order_data(command, 8);
Set_Port_Val(HT_CS, 1);
}
void ht1621_write(UCHAR addr, UCHAR data)
{
Set_Port_Val(HT_CS, 0);
ht1621_send_high_order_data(0xA0, 3);
ht1621_send_high_order_data(addr<<2, 6);
ht1621_send_low_order_data(data, 8);
Set_Port_Val(HT_CS, 1);
}
void ht1621_write_all(UCHAR addr, UCHAR *p, UCHAR len)
{
UCHAR i;
Set_Port_Val(HT_CS, 0);
ht1621_send_high_order_data(0xA0, 3);
ht1621_send_high_order_data(addr<<2, 6);
for (i=0; i<len; i++, p++)
{
ht1621_send_low_order_data(*p, 8);
}
Set_Port_Val(HT_CS, 1);
}
void ht1621_clr_all_display()
{
UCHAR i;
UCHAR addr = 0;
for (i=0; i<16; i++)
{
ht1621_write(addr, 0x00);
addr += 2;
}
}
void ht1621_all_display()
{
UCHAR i;
UCHAR addr = 0;
for (i=0; i<16; i++)
{
ht1621_write(addr, 0xFF);
addr += 2;
}
}
void ht1621_init()
{
ht1621_send_cmd(HT_SYS_EN);
ht1621_send_cmd(HT_RCOSC);
ht1621_send_cmd(HT_BISA_COM);
ht1621_send_cmd(HT_LCD_ON);
}
void set_lcd_on()
{
ht1621_send_cmd(HT_LCD_ON);
}
void set_lcd_off()
{
ht1621_send_cmd(HT_LCD_OFF);
}
#ifndef _HT1621_H
#define _HT1621_H
#define HT_BISA_COM 0x52 //(1<<1) | (0<<3) | (1<<4) | (0<<5) | (1<<6) | (0<<7) | (0<<8) | (0<<9) | (0<<10) | (1<<11)
#define HT_LCD_OFF 0x04 //(0<<1) | (1<<2) | (0<<4) | (0<<5) | (0<<6) | (0<<7) | (0<<8) | (0<<9) | (0<<10) | (1<<11)
#define HT_LCD_ON 0x06 //(1<<1) | (1<<2) | (0<<4) | (0<<5) | (0<<6) | (0<<7) | (0<<8) | (0<<9) | (0<<10) | (1<<11)
#define HT_WRITE_CMD 0x80 //(0<<0) | (0<<1) | (1<<2) | (0<<3) | (1<<4) | (0<<5) | (1<<6) | (0<<7) | (1<<8)
#define HT_WRITE_DATA 0xA0
#define HT_SYS_EN 0x02
#define HT_RCOSC 0x30
#endif