HT1621驱动

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一、HT1621

1) DATASHEET

2) 个人描述

HT1621是LCD屏幕的驱动电路芯片，负责点亮LCD屏上的灯，一个HT1621能驱动很多不同的LCD屏幕

3)容易混淆的概念:

Ps：LCD屏幕是屏幕，屏幕驱动芯片是芯片，HT1621 ≠ LCD屏幕

二、代码驱动

1.驱动代码(.c文件)

驱动代码GPIO控制理解为模拟I2C即可

 #define CS_HIGH  #define CS_LOW #define WR_HIGH  #define WR_LOW  #define DATA_HIGH  #define DATA_LOW  #define BIAS 0x50  #define SYS_EN 0X02  #define LCD_ON 0X06  #define RC256 0X30  #define WDT_DIS 0x0a #define TIME_DIS 0X08 static void ht1621write_data_LOW(uint8_t data,uint8_t n_bit) { 
      uint8_t current; for( current = 0 ; current < n_bit ; current++) { 
      WR_LOW; Delay(2); if( (data & 0x01) == 1) DATA_HIGH; else DATA_LOW; Delay(2); WR_HIGH; data >>= 1; Delay(2); } } static void ht1621write_data(uint8_t data,uint8_t n_bit) { 
      uint8_t current; for( current = 0 ; current < n_bit ; current++) { 
      WR_LOW; Delay(2); if(((data & 0x80) >> 7) == 1) DATA_HIGH; else DATA_LOW; Delay(2); WR_HIGH; data <<= 1; Delay(2); } } static void ht1621write_cmd(uint8_t cmd) { 
      CS_LOW; Delay(2); ht1621write_data(0x80,4); ht1621write_data(cmd,8); Delay(2); CS_HIGH; } void ht1621write_val(uint8_t addr , uint8_t data) { 
      addr <<= 2; CS_LOW; Delay(2); ht1621write_data(0xA0,3); ht1621write_data(addr,6); ht1621write_data_LOW(data,4); Delay(2); CS_HIGH; } void HT1621_INIT( void *pvParameters ) { 
      CS_HIGH; WR_HIGH; DATA_HIGH; ht1621write_cmd(BIAS); ht1621write_cmd(RC256); ht1621write_cmd(WDT_DIS); ht1621write_cmd(TIME_DIS); ht1621write_cmd(SYS_EN); ht1621write_cmd(LCD_ON); } 

2.驱动LCD屏幕

//思路程序模板举例 int i; for(i = 0 ; i < SEG_MAX; i++) { 
      if( i > 0 ) ht1621write_val(i-1,0xF); ht1621write_val(i,0x0); delay(5s); } //加个延时，就能看清每个地址对应的字段了