stm32f103c8t6 IIC端口接lcd1602具体实现程序

以下是使用STM32F103C8T6的I2C接口控制LCD1602的程序实现。

首先，需要在STM32CubeMX中配置I2C引脚和时钟，使能I2C总线。然后，使用HAL库提供的函数来控制LCD1602。

#include "stm32f1xx_hal.h"
#include "lcd1602.h"

I2C_HandleTypeDef hi2c1;

void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_I2C1_Init(void);

int main(void)
{
  HAL_Init();
  SystemClock_Config();
  MX_GPIO_Init();
  MX_I2C1_Init();

  lcd1602_init(&hi2c1);

  lcd1602_write_string(&hi2c1, "Hello, world!");

  while (1)
  {
  }
}

void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  __HAL_RCC_PWR_CLK_ENABLE();
  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);

  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
  RCC_OscInitStruct.HSEState = RCC_HSE_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();
  }

  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();
  }
}

static void MX_I2C1_Init(void)
{
  hi2c1.Instance = I2C1;
  hi2c1.Init.ClockSpeed = 100000;
  hi2c1.Init.DutyCycle = I2C_DUTYCYCLE_2;
  hi2c1.Init.OwnAddress1 = 0;
  hi2c1.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
  hi2c1.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
  hi2c1.Init.OwnAddress2 = 0;
  hi2c1.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
  hi2c1.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
  if (HAL_I2C_Init(&hi2c1) != HAL_OK)
  {
    Error_Handler();
  }
}

static void MX_GPIO_Init(void)
{
  __HAL_RCC_GPIOC_CLK_ENABLE();
  __HAL_RCC_GPIOB_CLK_ENABLE();
}

void HAL_Delay(uint32_t Delay)
{
  uint32_t tickstart = HAL_GetTick();
  while ((HAL_GetTick() - tickstart) < Delay)
  {
  }
}

void Error_Handler(void)
{
  __disable_irq();
  while (1)
  {
  }
}

lcd1602.h:

#ifndef __LCD1602_H__
#define __LCD1602_H__

#include "stm32f1xx_hal.h"

#define LCD1602_ADDRESS 0x4E

void lcd1602_init(I2C_HandleTypeDef *hi2c);
void lcd1602_write_string(I2C_HandleTypeDef *hi2c, char *string);

#endif

lcd1602.c:

#include "lcd1602.h"

void lcd1602_init(I2C_HandleTypeDef *hi2c)
{
  uint8_t init_data[] = {0x38, 0x08, 0x01, 0x06, 0x0C};

  HAL_I2C_Master_Transmit(hi2c, LCD1602_ADDRESS, init_data, sizeof(init_data), HAL_MAX_DELAY);
  HAL_Delay(100);
}

void lcd1602_write_string(I2C_HandleTypeDef *hi2c, char *string)
{
  uint8_t data[2];

  while (*string)
  {
    data[0] = 0x40;
    data[1] = *string++;
    HAL_I2C_Master_Transmit(hi2c, LCD1602_ADDRESS, data, sizeof(data), HAL_MAX_DELAY);
  }
}

这个程序使用I2C总线向LCD1602发送数据，通过初始化LCD1602以及写入字符串的函数来实现控制LCD1602。