How do I convert 51 code to STM32 driver code?

赵玉田

How do I convert 51 code to STM32 driver code? [Copy link]

From: Embedded from 0 to 1 Author: Programmer Xiaoha

Origin of the problem

User Q&A

NOKIA 5110 Screen

The Nokia5110 screen is a very classic LCD display module. When Xiaoha was playing with microcontrollers, there were not many LCD modules to choose from, generally speaking, they were LCD1602 and LCD12864. In my opinion at the time, the Nokia5110 screen was a very advanced LCD screen.

Nokia 5110 screen is a liquid crystal display module used in 5110, 6150, 6100 and other series of mobile phones. Domestic manufacturers also produce similar compatible products.

In addition to mobile phones, this product can also be widely used in display systems of various portable devices, single-chip microcomputer control display, human-computer interaction interface display, data acquisition display and other electronic design occasions.

Nokia 5110 mobile phone

Specifications

Working voltage: DC3.3-5.0V

Screen color: monochrome

Resolution: 84*48, Characters: 6*8 characters, 6 lines of characters can be displayed, 14 characters per line

Communication mode: serial SPI interface

LCD module: LPH7366

Application: Single chip microcomputer detection information display, human-computer interaction interface development and other electronic designs

Dimensions: 45x43x1.6mm

Pin Definition

name	meaning
CLK	Serial clock line
DIN	Serial Data Line
DC	Data/Instruction Select
CE	Chip Select
RST	Reset
VCC	Power input (3.3V and 5V are both available)
BL	Backlight control terminal
GND	Ground

Module Schematic

A module schematic found on the Internet

Actual hardware connection

Nokia 5110	STM32 side
CLK	PC3
DIN	PC2
DC	PC1
CE	PC0
RST	PC5
VCC	3.3V
BL	3.3V
GND	GND

Module size

Program transplantation

Xiao Ha Ge has used a 51 single-chip microcomputer to drive this LCD screen before. In actual use, only five IO pins are needed to drive it.

Let's see today, if you can't find the routines for the chip you are using on the Internet, and there are only routines for other chips, how do you refer to them? Let's transplant them.

Copy driver files

Copy the driver file of the LCD screen to the HARDWARE directory under the STM32 project, and add the file to the STM32 project.

Add GPIO initialization function

voidlcd_gpio_init(void)
{
GPIO_InitTypeDefGPIO_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC,ENABLE);

GPIO_InitStructure.GPIO_Pin=GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_5;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_Init(GPIOC,&GPIO_InitStructure);
}

Modify the macro definition of GPIO operation

//51单片机
//sbitLCD_RST=P0^0;
//sbitLCD_CE=P0^1;
//sbitLCD_DC=P0^2;
//sbitLCD_DIN=P0^3;
//sbitLCD_CLK=P0^4;

//STM32单片机
#defineLCD_RSTPCout(5)
#defineLCD_CEPCout(0)
#defineLCD_DCPCout(1)
#defineLCD_DINPCout(2)
#defineLCD_CLKPCout(3)

Modify the 1us delay

#defineWait1usdelay_us(1)

Function Call

//Nokia5110初始化
lcd_gpio_init();
lcd_init();
lcd_clear();//清屏幕

lcd_string(0,0,"Time:");

Compile the program, there is no error, download the program, and find that the preset content can be displayed normally on the screen, proving that the driver has been successfully transplanted.

Source code acquisition/material acquisition

Test the Demo source code.

5110测试工程 网文版本 20211212.zip (428.02 KB, downloads: 2)

2022-8-3 16:25 上传

点击文件名下载附件

Summarize

This test used Dupont cables. Although Dupont cables are convenient, once they are touched, the screen display output disappears. I can only plug and unplug them again and reset the microcontroller. I am speechless.

Also, please note that sometimes, the contact of the DuPont wire is not very good. When testing the program, you must first ensure that the contact of the DuPont wire is good. If you are not sure, you can use the buzzer mode of the multimeter to test whether the two ends of each pin are conductive.

How is it? It is quite simple, right? If you have STM32 code, you can convert it to 51 MCU code in the same way.

lugl4313820

Those who are still using this display are also big names in microcontrollers. I remember using this screen 6 years ago.

秦天qintian0303

In fact, the main problem is the adaptation of C language code between various microcontrollers, high portability, this would be fun if it were assembled

吾妻思萌

I've learned a lot. This is really informative.

luominxdy

I have learned a lot... This really broadens my horizons~······