蓝桥杯嵌入式——mcp4017

工程文件链接，不需要积分即可下载

1.在上一篇iic工程文件基础上进行修改

(1).添加mcp4017相关库函数代码，直接添加在iic.c文件内，并在bsp_iic.h文件内对新增加的库函数进行声明

void iic_mcp4017_write(uint8_t value)
{I2CStart();I2CSendByte(0x5e);I2CWaitAck();I2CSendByte(value);I2CWaitAck();I2CStop();}
uint8_t iic_mcp4017_read(void)
{uint8_t value;I2CStart();I2CSendByte(0x5f);I2CWaitAck();value = I2CReceiveByte();I2CSendNotAck();I2CStop();return value;
}

(2).在main.c内编写 mcp4017的功能函数

 main.c

#include "stdio.h"
#include "main.h"
#include "led\bsp_led.h"
#include "key\bsp_key.h"
#include "lcd\bsp_lcd.h"
#include "iic\bsp_iic.h"__IO uint32_t uwTick_key_set_point = 0;
unsigned char uckey_valu,uckey_old,uckey_down,uckey_up;__IO uint32_t uwTick_lcd_set_point = 0;
unsigned int i = 0;
unsigned char Lcd_Dis_String[22];//iic专用变量
uint8_t iic_send_buf[20] = {0,1,2,3,4,5,56};
uint8_t iic_receive_buf[20];uint8_t res_4017;void SystemClock_Config(void);
void KEY_Proc(void);
void LCD_Disp(void);int main(void)
{HAL_Init();SystemClock_Config();LED_Init();KEY_Init();LCD_Init();LCD_Clear(White);I2CInit();iic_24c02_write(iic_send_buf,0,7);iic_24c02_read(iic_receive_buf,0,7);sprintf((char *)Lcd_Dis_String,"iic_send_buf is %d",iic_send_buf[10]);LCD_DisplayStringLine(Line0, Lcd_Dis_String);iic_mcp4017_write(01);res_4017 = iic_mcp4017_read();sprintf((char *)Lcd_Dis_String,"res_4017 is %d",res_4017);LCD_DisplayStringLine(Line1, Lcd_Dis_String);sprintf((char *)Lcd_Dis_String,"res %5.2fK",res_4017*0.7874);LCD_DisplayStringLine(Line2, Lcd_Dis_String);sprintf((char *)Lcd_Dis_String,"resV %5.4fK",3.3*res_4017*0.7874/(res_4017*0.7874 + 10));LCD_DisplayStringLine(Line3, Lcd_Dis_String);while (1){KEY_Proc();//LCD_Disp();}}
void LCD_Disp(void)
{if (uwTick - uwTick_lcd_set_point < 200) return;uwTick_lcd_set_point = uwTick;i++;sprintf((char *)Lcd_Dis_String,"		The time is %d",i);LCD_DisplayStringLine(Line0, Lcd_Dis_String);LCD_DisplayStringLine(Line1, Lcd_Dis_String);}void KEY_Proc(void)
{if (uwTick - uwTick_key_set_point < 200) return;uwTick_key_set_point = uwTick;uckey_valu = KEY_Scan();uckey_down = uckey_valu & (uckey_old^uckey_valu);uckey_up = ~uckey_valu & (uckey_old^uckey_valu);uckey_old = uckey_valu;if (uckey_down == 1){LED_Disp(0x11);}if (uckey_down == 2){LED_Disp(0xff);}if (uckey_down == 3){LED_Disp(0x44);}if (uckey_down == 4){LED_Disp(0x00);}
}void SystemClock_Config(void)
{RCC_OscInitTypeDef RCC_OscInitStruct = {0};RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};HAL_PWREx_ControlVoltageScaling(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.PLLM = RCC_PLLM_DIV3;RCC_OscInitStruct.PLL.PLLN = 20;RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;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_DIV1;RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK){Error_Handler();}
}void Error_Handler(void)
{__disable_irq();while (1){}}#ifdef  USE_FULL_ASSERTvoid 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 */

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