今天用HT1621液晶模块显示一路AD的值。代码外设配置用MCC生成，我们这里开启调试串口和一路ADC。串口配置：9600,N,8,1 启用printf重定向
ADC 用RC3对应的ANC3 ，主意数据格式为右对齐，一开始我选择的左对齐，然后发现与生成的代码里面的算法不匹配，
参考电压选择VDD。软件触发模式~
我们模拟IIC来启动HT1621：
其中HT6121代码如下：
h文件：
/*
* File: HT1621.h
* Author: Administrator
*
* Created on February 21, 2021, 9:01 AM
*/
#ifndef HT1621_H
#define HT1621_H
#ifdef __cplusplus
extern "C" {
#endif
#include <xc.h>
//HT1621??
#define BIAS 0x52 //0b1000 0101 0010 1/3duty 4com
#define SYSDIS 0X00 //0b1000 0000 0000 ???????LCD?????
#define SYSEN 0X02 //0b1000 0000 0010 ???????
#define LCDOFF 0X04 //0b1000 0000 0100 ?LCD??
#define LCDON 0X06 //0b1000 0000 0110 ??LCD??
#define XTAL 0x28 //0b1000 0010 1000 ?????
#define RC256 0X30 //0b1000 0011 0000 ????
#define WDTDIS1 0X0A //0b1000 0000 1010 ?????
void Ht1621Wr_Data(unsigned char Data,unsigned char cnt) ;
void Ht1621WrCmd(unsigned char Cmd) ;
void Ht1621WrOneData(unsigned char Addr,unsigned char Data);
void Ht1621WrAllData(unsigned char Addr,unsigned char *p,unsigned char cnt);
void Ht1621_Init(void) ;
void Display(void) ;
void Display_lcd_dot(void) ;
void data_convertor(unsigned long adc_value) ;
#ifdef __cplusplus
}
#endif
#endif /* HT1621_H */
#include "HT1621.h"
#include "pin_manager.h"
unsigned int tmp;
unsigned int n1, n2, n3, n4;
unsigned char DispTab[]={0xEB,0x0A,0xAD,0x8F,0x4E,0xC7,0xE7,0x8A,0xEF,0xCF,0x85,0xEE, 0x67, 0xE1,0x2F,0xE5,0xE4};
//??????
void Ht1621_CS_0() { HT1621_CS_SetLow() ;} //
void Ht1621_CS_1() { HT1621_CS_SetHigh() ;}
void Ht1621_WR_0() { HT1621_WR_SetLow();} //
void Ht1621_WR_1() { HT1621_WR_SetHigh();}
void Ht1621_DAT_0() { HT1621_DATA_SetLow();} //
void Ht1621_DAT_1() { HT1621_DATA_SetHigh();}
void Ht1621_GND_0() { HT1621_GND_SetLow();} //
void Ht1621_GND_1() { HT1621_GND_SetLow();}
void Ht1621_VCC_0() { HT1621_VCC_SetLow();} //
void Ht1621_VCC_1() { HT1621_VCC_SetHigh();}
/*******************************************************************************
****????:
****????:1621?????
****??:V1.0
****??:14-2-2014
****????:Data-?????? cnt-????????
****????:
****??:
********************************************************************************/
void Ht1621Wr_Data(unsigned char Data,unsigned char cnt)
{
unsigned char i;
for (i=0;i<cnt;i++)
{
Ht1621_WR_0();
if((Data & 0x80)==0x80)
{Ht1621_DAT_1();}
else
{Ht1621_DAT_0();}
Ht1621_WR_1();
Data<<=1;
}
}
/*******************************************************************************
****????:
****????:1621?????
****??:V1.0
****??:14-2-2014
****????:Cmd ??
****????:
****??:
********************************************************************************/
void Ht1621WrCmd(unsigned char Cmd)
{
Ht1621_CS_0();
Ht1621Wr_Data(0x80,4); //??????100
Ht1621Wr_Data(Cmd,8); //??????
Ht1621_CS_1();
}
/*******************************************************************************
****????:
****????:1621???????
****??:V1.0
****??:14-2-2014
****????:Addr--?? Data--??
****????:
****??:
********************************************************************************/
void Ht1621WrOneData(unsigned char Addr,unsigned char Data)
{
Ht1621_CS_0();
Ht1621Wr_Data(0xa0,3); //??????101
Ht1621Wr_Data(Addr<<2,6); //??????
Ht1621Wr_Data(Data,4); //???????? 7 6 5 4
Ht1621_CS_1();
}
/*******************************************************************************
****????:
****????:1621???????
****??:V1.0
****??:14-2-2014
****????:Addr--?? p--?? cnt????
****????:
****??:
********************************************************************************/
void Ht1621WrAllData(unsigned char Addr,unsigned char *p,unsigned char cnt)
{
unsigned char i;
Ht1621_CS_0();
Ht1621Wr_Data(0xa0,3); //??????101
Ht1621Wr_Data(Addr<<2,6); //??????
for (i=0;i<cnt;i++)
{
Ht1621Wr_Data(*p,8); //????
p++;
}
Ht1621_CS_1();
}
/*******************************************************************************
****????:
****????:1621?????
****??:V1.0
****??:14-2-2014
****????:
****????:
****??:
********************************************************************************/
void Ht1621_Init(void)
{
Ht1621_GND_0(); //HT1621 power on
Ht1621_VCC_1();
Ht1621WrCmd(BIAS);
Ht1621WrCmd(RC256); //???????
//Ht1621WrCmd(XTAL); //???????
Ht1621WrCmd(SYSDIS);
Ht1621WrCmd(WDTDIS1);
Ht1621WrCmd(SYSEN);
Ht1621WrCmd(LCDON);
}
/*******************************************************************************
****????:
****????:1621????
****??:V1.0
****??:14-2-2014
****????:
****????:
****??:
********************************************************************************/
void Display(void)
{
Ht1621WrOneData(0 , DispTab[n4]);
Ht1621WrOneData(1 , DispTab[n4]<<4);
Ht1621WrOneData(2 , DispTab[n3]);
Ht1621WrOneData(3 , DispTab[n3]<<4);
Ht1621WrOneData(4 , DispTab[n2]);
Ht1621WrOneData(5 , DispTab[n2]<<4);
Ht1621WrOneData(6 , DispTab[n1]);
Ht1621WrOneData(7 , DispTab[n1]<<4);
}
/*******************************************************************************
****????:
****????:??????
****??:V1.0
****??:14-2-2014
****????:Addr--?? Data--??
****????:
****??:
********************************************************************************/
void Display_lcd_dot(void)
{
//Ht1621WrOneData(0 , DispTab[n4]|0x10);//P1
Ht1621WrOneData(2 , DispTab[n3]|0x10); //2P
//Ht1621WrOneData(4 , DispTab[n2]|0x10); //3P
//Ht1621WrOneData(6 , DispTab[n1]|0x10); //4P
}
/*******************************************************************************
****????:
****????:??????
****??:V1.0
****??:14-2-2014
****????:adc_value-???????
****????:
****??:
********************************************************************************/
void data_convertor(unsigned long adc_value)
{
tmp=adc_value; //adc
n4=tmp/1000;
tmp=tmp%1000;
n3=tmp/100;
tmp=tmp%100;
n2=tmp/10;
tmp=tmp%10;
n1=tmp;
}
#include "mcc_generated_files/mcc.h"
#include "mcc_generated_files/HT1621.h"
unsigned char Ht1621Tab[]={0x00,0x00,0x00,0x00};
/*
Main application
*/
void main(void)
{
//unsigned char i=0;
uint16_t u16_adc1_value;
uint16_t VoltageValue;
// initialize the device
SYSTEM_Initialize();
__delay_ms(5000);
Ht1621_Init(); //?????LCD
__delay_ms(5000); //??????
Ht1621WrAllData(0,Ht1621Tab,16);// Clear LCD display
// When using interrupts, you need to set the Global and Peripheral Interrupt Enable bits
// Use the following macros to:
// Enable the Global Interrupts
//INTERRUPT_GlobalInterruptEnable();
// Enable the Peripheral Interrupts
//INTERRUPT_PeripheralInterruptEnable();
// Disable the Global Interrupts
//INTERRUPT_GlobalInterruptDisable();
// Disable the Peripheral Interrupts
//INTERRUPT_PeripheralInterruptDisable();
while (1)
{
//u16_adc1_value=ADC_GetConversion(channel_ANC3);
//u16_adc1_value=ADC_GetConversion(channel_AVSS);
u16_adc1_value=ADC_GetConversion(channel_FVR_BUF1);
VoltageValue=u16_adc1_value*3300UL/1024UL;
data_convertor(VoltageValue);
Display();
Display_lcd_dot();
printf("the ADCVALUE is %d ,the VoltageValue is %d\r\n",u16_adc1_value,VoltageValue);
__delay_ms(1000);
}
}
编译下载代码，分别测试3V3和2.048：
其中，观察了FVR的电压，会从2.049 来回跳到2.056 ，有(2.056-2.049)=0.007V的波动
查看串口输出的信息：
发现采样到的ADC值就相差2个最小单位，0.007/2=0.0035与官方精度(3.3/1024=0.0032)几乎接近。
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