LCD显示--Ht1621b芯片显示屏驱动

Ht1621b芯片显示屏驱动

关于HT1621b芯片的具体信息能够參考数据手冊上的内容:百度文库HT1621b中文资料

CS : 片选输入接一上拉电阻当/CS 为高电平读写HT1621的数据和命令无效串行接口电路复位当/CS 为低电平和作为输入时读写HT1621的数据和命令有效.

WR : WRITE脉冲输入接一上拉电阻在/WR 信号的上升沿 DATA线上的数据写到HT1621.

DATA : 外接上拉电阻的串行数据输入/输出.

下面为芯片驱动程序(STM8单片机):

#include "stm8s.h"
#include "global.h" /* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
//显示芯片HT1621引脚定义
#define HT1621_CS_PORT GPIOC
#define HT1621_CS_PIN GPIO_PIN_7
#define Ht1621CsHigh (HT1621_CS_PORT->ODR |= (u8)(HT1621_CS_PIN))
#define Ht1621CsLow (HT1621_CS_PORT->ODR &= (u8)(~HT1621_CS_PIN)) #define HT1621_WR_PORT GPIOC
#define HT1621_WR_PIN GPIO_PIN_6
#define Ht1621WrHigh (HT1621_WR_PORT->ODR |= (u8)(HT1621_WR_PIN))
#define Ht1621WrLow (HT1621_WR_PORT->ODR &= (u8)(~HT1621_WR_PIN)) #define HT1621_DATA_PORT GPIOC
#define HT1621_DATA_PIN GPIO_PIN_5
#define Ht1621DataHigh (HT1621_DATA_PORT->ODR |= (u8)(HT1621_DATA_PIN))
#define Ht1621DataLow (HT1621_DATA_PORT->ODR &= (u8)(~HT1621_DATA_PIN)) //LCD屏背光PWM设定
#define BLACK_LIGHT_PORT GPIOD
#define BLACK_LIGHT_PIN GPIO_PIN_3
#define LedPwmDuty(A) TIM2->CCR2H = (u8)((A)>> 8);TIM2->CCR2L = (u8)(A);
#define LedOn() TIM2->CCER1 |= TIM2_CCER1_CC2E
#define LedOff() TIM2->CCER1 &= (~TIM2_CCER1_CC2E) #define COMMAND_CODE 0x80 //命令码
#define WRITE_DATA_CODE 0xa0 //写命令
#define READ_DATA_CODE 0xc0 //读命令
#define DISPLAY_BEGIN_ADDR (0X0F << 2) //显示起始地址
#define SYS_EN 0x02
#define RC_256K 0x30
#define BIAS_13 0x52
#define TONE_ON 0x12 //打开声音输出
#define TONE_OFF 0x10
#define TONE_2K 0xc0
#define TONE_4K 0x80
#define LCD_ON 0x06 /* Private variables ---------------------------------------------------------*/
void Ht1621_WriteCommand(uint8_t Cmd);
void Ht1621_WriteNBit(uint8_t BitCnt, uint8_t wData);
/* Public functions ----------------------------------------------------------*/
void Ht1621_Init(void);
void Ht1621_WriteData(const uint8_t *wDataBuf);
void Ht1621_BuzzerControl(uint8_t RunFlag); /*******************************************************************************
函数:延时函数 ms
參数:
返回值:无
*******************************************************************************/
void Ht1621_Delay(uint8_t ms)
{
unsigned short jj;
for (jj = 1; jj <= ms; jj++)
{
nop();
}
} /*******************************************************************************
函数:HT1621初始化
參数:
返回值:无
*******************************************************************************/
void Ht1621_Init(void)
{
Ht1621_WriteCommand(SYS_EN); //SYS_EN 打开系统振荡器
Ht1621_Delay(5); Ht1621_WriteCommand(RC_256K); //RC_256K 系统时钟源 片内RC振荡器
Ht1621_Delay(5); Ht1621_WriteCommand(BIAS_13); //BIAS13 4个公共口
Ht1621_Delay(5); Ht1621_WriteCommand(TONE_4K); //TONE_2KC0 TONE_4K80
Ht1621_Delay(5); Ht1621_WriteCommand(LCD_ON); //LCD_ON 打开LCD偏压发生器
Ht1621_Delay(5);
} /*******************************************************************************
函数:HT1621 写一字节数据
參数: 写数据的为位数 和 数据
返回值:无
*******************************************************************************/
void Ht1621_WriteNBit(uint8_t wData , uint8_t BitCnt)
{
uint8_t i; for(i=0; i< BitCnt; i++)
{
Ht1621WrLow;
Ht1621_Delay(2); if((wData << i) & 0x80)
{
Ht1621DataHigh;
}
else
{
Ht1621DataLow;
}
Ht1621_Delay(2); Ht1621WrHigh;
Ht1621_Delay(2);
}
} /*******************************************************************************
函数:HT1621 写数据操作(连续写 3位写操作命令+6位地址+ ...数据)
參数: 写数据指针
返回值:无
*******************************************************************************/
void Ht1621_WriteData(const uint8_t *wDataBuf)
{
uint8_t i; Ht1621CsLow;
Ht1621_Delay(2); Ht1621_WriteNBit(WRITE_DATA_CODE, 3);
Ht1621_WriteNBit(DISPLAY_BEGIN_ADDR, 6); //TODO: 20140820 hzg 注意要相应原理图上的起始地址 for(i=0; i<12; i++)
{
Ht1621_WriteNBit(wDataBuf[i], 8);
} Ht1621CsHigh;
Ht1621_Delay(2);
} /*******************************************************************************
函数:HT1621 写命令操作(12位命令数据)
參数: 命令值
返回值:无
*******************************************************************************/
void Ht1621_WriteCommand(uint8_t Cmd)
{
Ht1621CsLow;
Ht1621_Delay(2); Ht1621_WriteNBit(COMMAND_CODE, 4);
Ht1621_WriteNBit(Cmd, 8); Ht1621CsHigh;
Ht1621_Delay(2);
} /*******************************************************************************
函数:HT1621 蜂鸣器输出控制(12位命令数据)
參数: 开关标志
返回值:无
*******************************************************************************/
void Ht1621_BuzzerControl(uint8_t RunFlag)
{
(RunFlag == 0)?Ht1621_WriteCommand(TONE_OFF):Ht1621_WriteCommand(TONE_ON);
}
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