LCD1602开始--麒麟座OK

LCD1602
每行显示16个字符一共2行
DB0--PB5
DB1--PB6
DB2--PB7
DB3--PB8
DB4--PB9
DB5--PC0
DB6--PC1
DB7--PC2
控制
使能PB4---------------- --[1--延时--0完成使能]
数据/命令选择 PC6 --- [1-数据 0-命令]
读/写选择 PA11------ [1-读 0-写]

分析一个数据过来比如11001010
那么分配一下
DB0--PB5--0
DB1--PB6--1
DB2--PB7--0
DB3--PB8--1
DB4--PB9--0
DB5--PC0--0
DB6--PC1--1
DB7--PC2--1
代码如何写呢？一个数据过来需要分割2部分5BIT去PB 3BIT去PC
void Lcd1602_SendByte(unsigned char byte)
{
   unsigned short value = 0;

   value = GPIO_ReadOutputData(GPIOB);                   //读取GPIOB的数据
   value &= ~(0x001F << 5);                           //清除bit5~8
   value |= ((unsigned short)byte & 0x001F) << 5;       //将要写入的数据取低5位并左移5位
   GPIO_Write(GPIOB, value);                           //写入GPIOB

   value = GPIO_ReadOutputData(GPIOC);                   //读取GPIOC的数据
   value &= ~(0x0007 << 0);                           //清除bit0~2
   value |= ((unsigned short)byte & 0x00E0) >> 5;       //将要写入的数据取高3位并右移5位
   GPIO_Write(GPIOC, value);                           //写入GPIOC

DelayUs(10);
}
可以看到用了value整体处理而不是一个一个去控制，因为设计好了，你看
先   value = GPIO_ReadOutputData(GPIOB);   //读取GPIOB的数据它包含了PB的全部引脚比如PB3它现在是高电平在亮灯的话那么PB3就是1 一起读出来是unsigned short
在   value &= ~(0x001F << 5);   //清除bit5~8 因为我们用的是PB56789 把我们控制的操作不会干扰PB3的LED
在 value |= ((unsigned short)byte & 0x001F) << 5;       //其实这句话才体现了不会干扰PB3的LED 其他位置不变在约定的地方|进去了byte参数的部分
在   GPIO_Write(GPIOB, value);                           //完成目标控制并且不干扰别的管脚

可以看到这个依赖硬件的设计管脚尽量靠在一起操作方便

开始流程：
初始化--全部设置为output--开始初始化程序--
Lcd1602_WriteCom(0x38);
DelayXms(5);
Lcd1602_WriteCom(0x38);
DelayXms(5);
Lcd1602_WriteCom(0x38);
Lcd1602_WriteCom_Busy(0x38);
Lcd1602_WriteCom_Busy(0x08);
Lcd1602_WriteCom_Busy(0x01);
Lcd1602_WriteCom_Busy(0x06);
Lcd1602_WriteCom_Busy(0x0c);
--开始显示

关键函数Lcd1602_SendByte开始分析

GPIO的库函数控制做个小测试吧

+++++++++++++++++++mcube+++在开始+++

https://www.cnblogs.com/will-king0308/p/8656077.html

8个数据

pa0 1 2 3 4 5 6 7-----D0 1 2 3 4 5 6 7

这样直接连接

另外3个需要编程的

pB7---rs

pb6--rw

pb5-e

供电

1---背光走3.3VSTM32板子

2---LCD上电用USB GNB+5V 3.3V 因为5V是开机的 3.3v是三号脚对比的

最后上图是比较好看的

开始逻辑 8+3 全部的编程IO都是基础的GPIO_Mode_Out_PP

+++++++++++++++++麒麟座OK+++++++++

可以直接运行

如果麒麟座第一次烧录以后此后STLINK无法连接无法KEIL烧录用3。3V拉一下R7也就是BOOT0

目前BOOT 0 1 都是GND的你板子下电 usbhub一起供电关闭

短接R7和3.3V 上电就可以烧录了

第一步提供US延时利用tim

void MX_TIM2_Init(void)
{htim2.Instance = TIM2;htim2.Init.Prescaler = 72-1;htim2.Init.CounterMode = TIM_COUNTERMODE_UP;htim2.Init.Period = 1000-1;

void TIM2_Delay(int us)
{uint16_t differ=us;if(differ>999)return;HAL_TIM_Base_Start(&htim2);__HAL_TIM_SET_COUNTER(&htim2,0);while(__HAL_TIM_GET_COUNTER(&htim2) < differ);HAL_TIM_Base_Stop(&htim2);
}

第二部IO对应有问题下面是OK的

#define RS_H   HAL_GPIO_WritePin(GPIOC, GPIO_PIN_6, GPIO_PIN_SET);
#define RS_L   HAL_GPIO_WritePin(GPIOC, GPIO_PIN_6, GPIO_PIN_RESET);#define RW_H   HAL_GPIO_WritePin(GPIOA, GPIO_PIN_11, GPIO_PIN_SET);
#define RW_L   HAL_GPIO_WritePin(GPIOA, GPIO_PIN_11, GPIO_PIN_RESET);#define EN_H   HAL_GPIO_WritePin(GPIOB, GPIO_PIN_4, GPIO_PIN_SET);
#define EN_L   HAL_GPIO_WritePin(GPIOB, GPIO_PIN_4, GPIO_PIN_RESET);

全部代码

/* USER CODE BEGIN Header */
/********************************************************************************* @file           : main.c* @brief          : Main program body******************************************************************************* @attention** <h2><center>&copy; Copyright (c) 2021 STMicroelectronics.* All rights reserved.</center></h2>** This software component is licensed by ST under BSD 3-Clause license,* the "License"; You may not use this file except in compliance with the* License. You may obtain a copy of the License at:*                        opensource.org/licenses/BSD-3-Clause********************************************************************************/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "tim.h"
#include "gpio.h"/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes *//* USER CODE END Includes *//* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD *//* USER CODE END PTD *//* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD *//* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM *//* USER CODE END PM *//* Private variables ---------------------------------------------------------*//* USER CODE BEGIN PV *//* USER CODE END PV *//* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP *//* USER CODE END PFP *//* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
void TIM2_Delay(int us)
{uint16_t differ=us;if(differ>999)return;HAL_TIM_Base_Start(&htim2);__HAL_TIM_SET_COUNTER(&htim2,0);while(__HAL_TIM_GET_COUNTER(&htim2) < differ);HAL_TIM_Base_Stop(&htim2);
}
/* USER CODE END 0 */
#define RS_H   HAL_GPIO_WritePin(GPIOC, GPIO_PIN_6, GPIO_PIN_SET);
#define RS_L   HAL_GPIO_WritePin(GPIOC, GPIO_PIN_6, GPIO_PIN_RESET);#define RW_H   HAL_GPIO_WritePin(GPIOA, GPIO_PIN_11, GPIO_PIN_SET);
#define RW_L   HAL_GPIO_WritePin(GPIOA, GPIO_PIN_11, GPIO_PIN_RESET);#define EN_H   HAL_GPIO_WritePin(GPIOB, GPIO_PIN_4, GPIO_PIN_SET);
#define EN_L   HAL_GPIO_WritePin(GPIOB, GPIO_PIN_4, GPIO_PIN_RESET);uint32_t GReadGPIOOutput(GPIO_TypeDef* GPIOx)
{return GPIOx->ODR;}void GWriteGPIOOutput(GPIO_TypeDef* GPIOx,uint32_t value)
{GPIOx->ODR = value;}void Lcd1602_SendByte(unsigned char byte)
{unsigned short value = 0;value = GReadGPIOOutput(GPIOB);                 //读取GPIOB的数据value &= ~(0x001F << 5);                         //清除bit5~8value |= ((unsigned short)byte & 0x001F) << 5;     //将要写入的数据取低5位并左移5位GWriteGPIOOutput(GPIOB, value);                           //写入GPIOBvalue = GReadGPIOOutput(GPIOC);                   //读取GPIOC的数据value &= ~(0x0007 << 0);                         //清除bit0~2value |= ((unsigned short)byte & 0x00E0) >> 5;     //将要写入的数据取高3位并右移5位GWriteGPIOOutput(GPIOC, value);                           //写入GPIOC    TIM2_Delay(10);
}void Lcd1602_WriteCom(unsigned char byte)
{RS_L;RW_L;Lcd1602_SendByte(byte);EN_H;TIM2_Delay(20); EN_L;TIM2_Delay(5);
}void Lcd1602_WriteCom_Busy(unsigned char byte)
{HAL_Delay(2); RS_L;RW_L;Lcd1602_SendByte(byte);EN_H;TIM2_Delay(20); EN_L;TIM2_Delay(5);
}
void Lcd1602_WriteData(unsigned char byte)
{RS_H;RW_L;Lcd1602_SendByte(byte);EN_H;TIM2_Delay(20); EN_L;TIM2_Delay(5);
}
void Lcd1602_Init(void)
{HAL_Delay(15);Lcd1602_WriteCom(0x38);HAL_Delay(5);Lcd1602_WriteCom(0x38);HAL_Delay(5);Lcd1602_WriteCom(0x38);Lcd1602_WriteCom_Busy(0x38);Lcd1602_WriteCom_Busy(0x08);Lcd1602_WriteCom_Busy(0x01);Lcd1602_WriteCom_Busy(0x06);Lcd1602_WriteCom_Busy(0x0c);EN_L;
}void lcd_char_write(unsigned int x_pos,unsigned int y_pos,unsigned char lcd_dat) /*LCD1602 字符写入*/
{x_pos &= 0x0f; y_pos &= 0x01; if(y_pos==1) x_pos += 0x40;x_pos += 0x80;Lcd1602_WriteCom_Busy(x_pos);Lcd1602_WriteData(lcd_dat);
}#include <stdarg.h>
void Lcd1602_DisString(unsigned char pos, char *fmt,...)
{unsigned char LcdPrintfBuf[33];unsigned char count = 0;unsigned char remain = 0;                 //一行剩余空间va_list ap;unsigned char *pStr = LcdPrintfBuf;va_start(ap,fmt);vsprintf((char *)LcdPrintfBuf, fmt, ap);va_end(ap);remain = 0x8f - pos;                        //这里解决bug，以前只管写16次，这次要根据开始的位置来计算Lcd1602_WriteCom_Busy(pos);while(*pStr != 0){Lcd1602_WriteData(*pStr++);if(++count > remain && pos <= 0x8f){count = 0;Lcd1602_WriteCom_Busy(0xC0);HAL_Delay(1);}}}/*** @brief  The application entry point.* @retval int*/unsigned char temp_table[] ={"TempNow:    .  C"};
unsigned char temp_set_table[]={"MMX:70C IN:     "};
int main(void)
{/* USER CODE BEGIN 1 *//* USER CODE END 1 *//* MCU Configuration--------------------------------------------------------*//* Reset of all peripherals, Initializes the Flash interface and the Systick. */HAL_Init();/* USER CODE BEGIN Init *//* USER CODE END Init *//* Configure the system clock */SystemClock_Config();/* USER CODE BEGIN SysInit *//* USER CODE END SysInit *//* Initialize all configured peripherals */MX_GPIO_Init();MX_TIM2_Init();/* USER CODE BEGIN 2 */
Lcd1602_Init();//       Lcd1602_DisString(0x80, "OneNET-IOT");
//              Lcd1602_DisString(0xC0, "China Mobile");
for(int i=0;i<16;i++)
lcd_char_write(i,0,temp_table[i]);
for(int j=0;j<16;j++)
lcd_char_write(j,1,temp_set_table[j]);/* USER CODE END 2 *//* Infinite loop *//* USER CODE BEGIN WHILE */while (1){/* USER CODE END WHILE */
//HAL_Delay(200);
for(int i=0;i<1000;i++)      TIM2_Delay(200);
HAL_GPIO_TogglePin(LED2_GPIO_Port,LED2_Pin);/* USER CODE BEGIN 3 */}/* USER CODE END 3 */
}/*** @brief System Clock Configuration* @retval None*/
void SystemClock_Config(void)
{RCC_OscInitTypeDef RCC_OscInitStruct = {0};RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};/** Initializes the RCC Oscillators according to the specified parameters* in the RCC_OscInitTypeDef structure.*/RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;RCC_OscInitStruct.HSEState = RCC_HSE_ON;RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;RCC_OscInitStruct.HSIState = RCC_HSI_ON;RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK){Error_Handler();}/** Initializes the CPU, AHB and APB buses clocks*/RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK){Error_Handler();}
}/* USER CODE BEGIN 4 *//* USER CODE END 4 *//*** @brief  This function is executed in case of error occurrence.* @retval None*/
void Error_Handler(void)
{/* USER CODE BEGIN Error_Handler_Debug *//* User can add his own implementation to report the HAL error return state */__disable_irq();while (1){}/* USER CODE END Error_Handler_Debug */
}#ifdef  USE_FULL_ASSERT
/*** @brief  Reports the name of the source file and the source line number*         where the assert_param error has occurred.* @param  file: pointer to the source file name* @param  line: assert_param error line source number* @retval None*/
void assert_failed(uint8_t *file, uint32_t line)
{/* USER CODE BEGIN 6 *//* User can add his own implementation to report the file name and line number,ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) *//* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT *//************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

麒麟座的使用

1---STLINK直接连接103的这个要转接一下

也就是用麒麟座需要自己多一个线

2--每次KEIL烧录失败你需要板子下电短句R7-3.3V然后上电烧录完毕以后在下电上电run

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