公司网站管理图片,电商详情页模板,什么叫网站后台,深圳全网营销型网站STM32存储左右互搏 I2C总线读写EEPROM ZD24C1MA
在较低容量存储领域#xff0c;EEPROM是常用的存储介质#xff0c;不同容量的EEPROM的地址对应位数不同#xff0c;在发送字节的格式上有所区别。EEPROM是非快速访问存储#xff0c;因为EEPROM按页进行组织#xff0c;在连…STM32存储左右互搏 I2C总线读写EEPROM ZD24C1MA
在较低容量存储领域EEPROM是常用的存储介质不同容量的EEPROM的地址对应位数不同在发送字节的格式上有所区别。EEPROM是非快速访问存储因为EEPROM按页进行组织在连续操作模式当跨页时访问地址不是跳到下一页到开始而是跳到当前页的首地址因此跨页时要重新指定起始地址。而在控制端发送写操作I2C数据后还需要有等待EEPROM内部操作完成的时间才能进行下一次操作。ZD24C1MA是1M bit / 128K Byte容量的EEPROM,ZD24C1MA的管脚定义为 这里介绍STM32访问1Mbit EEPROM ZD24C1MA的例程。采用STM32CUBEIDE开发平台以STM32F401CCU6芯片为例通过STM32 I2C硬件电路实现读写操作通过UART串口进行控制。
STM32工程配置
首先建立基本工程并设置时钟 配置硬件I2C接口 配置UART1作为通讯串口 保存并生成初始工程代码
STM32工程代码
这里的测试逻辑比较简单 当串口收到指令0x01时向EEPROM 地址0写入预设的256个字节0x00~0xFF不跨页然后读出并通过串口打印出 当串口收到指令0x02时向EEPROM 地址600写入预设的256个字节0xFF~0x00跨页然后读出并通过串口打印出
ZD24C1MA的设备默认访问地址为0xA0 ZD24C1MA的存储单元地址访问略为特殊17位地址分为两部分最高位的1位放置于I2C设备默认访问地址的第1位I2C设备默认访问地址第0位仍然为读写控制位由于采用硬件I2C控制库函数自行通过识别调用的是发送还是接收函数对第0位进行发送前设置因此不管是调用库函数的I2C写操作还是读操作提供的地址相同。17位地址的低16位通过在发送设备地址后的作为跟随的第一二个字节发送。
建立ZD24C1MA.h库头文件
#ifndef INC_ZD24C1MA_H_
#define INC_ZD24C1MA_H_#include main.hvoid PY_Delay_us_t(uint32_t Delay);
void ZD24C1MA_Read(uint32_t addr, uint8_t * data, uint32_t len);
void ZD24C1MA_Write(uint32_t addr, uint8_t * data, uint32_t len);#endif
建立ZD24C1MA.c库源文件 #include string.h
#include ZD24C1MA.h#define Page_Size 256
#define Delay_Param 5
extern I2C_HandleTypeDef hi2c1;
extern uint8_t ZD24C1MA_Default_I2C_Addr ;void ZD24C1MA_Read(uint32_t addr, uint8_t * data, uint32_t len)
{uint8_t ZD24C1MA_I2C_Addr;ZD24C1MA_I2C_Addr ZD24C1MA_Default_I2C_Addr | ((addr16)1); //highest 1-bit access address placed into I2C addressuint8_t RA[2];RA[0] (addr 0xFF00)8; //high 8-bit access address placed into I2C first dataRA[1] addr 0x00FF; //low 8-bit access address placed into I2C first dataHAL_I2C_Master_Transmit(hi2c1, ZD24C1MA_I2C_Addr, RA[0], 2, 2700); //Write address for readHAL_I2C_Master_Receive(hi2c1, ZD24C1MA_I2C_Addr, data, len, 2700); //Read data}void ZD24C1MA_Write(uint32_t addr, uint8_t * data, uint32_t len)
{uint8_t ZD24C1MA_I2C_Addr;uint32_t addr_page addr/Page_Size;uint32_t addr_index addr%Page_Size;uint32_t TLEN;uint8_t TAD[Page_Size2];uint32_t i0;if(len(Page_Size-addr_index)){TAD[0] (addr 0xFF00) 8;TAD[1] addr 0x00FF ;memcpy(TAD2, data, len);ZD24C1MA_I2C_Addr ZD24C1MA_Default_I2C_Addr | ((addr16)1); //highest 1-bit access address placed into I2C addressHAL_I2C_Master_Transmit(hi2c1, ZD24C1MA_I2C_Addr, TAD, len2, 2700); //Write dataPY_Delay_us_t(Delay_Param*1000);}else{TAD[0] (addr 0xFF00) 8;TAD[1] addr 0x00FF ;memcpy(TAD2, data, (Page_Size-addr_index));ZD24C1MA_I2C_Addr ZD24C1MA_Default_I2C_Addr | ((addr16)1); //highest 1-bit access address placed into I2C addressHAL_I2C_Master_Transmit(hi2c1, ZD24C1MA_I2C_Addr, TAD, (Page_Size-addr_index)2, 2700); //Write dataPY_Delay_us_t(Delay_Param*1000);TLEN (len-(Page_Size-addr_index));while( TLEN Page_Size ){addr_page 1;TAD[0] ((addr_page*Page_Size) 0xFF00 ) 8;TAD[1] (addr_page*Page_Size) 0x00FF ;memcpy(TAD2, data (Page_Size-addr_index) i*Page_Size, Page_Size);ZD24C1MA_I2C_Addr ZD24C1MA_Default_I2C_Addr | (((addr_page*Page_Size)16)1); //highest 1-bit access address placed into I2C addressHAL_I2C_Master_Transmit(hi2c1, ZD24C1MA_I2C_Addr, TAD, Page_Size2, 2700); //Write dataHAL_Delay(Delay_Param);i;TLEN - Page_Size;PY_Delay_us_t(Delay_Param*1000);}if(TLEN0){addr_page 1;TAD[0] ((addr_page*Page_Size) 0xFF00 ) 8;TAD[1] (addr_page*Page_Size) 0x00FF ;memcpy(TAD2, data (Page_Size-addr_index) i*Page_Size, TLEN);ZD24C1MA_I2C_Addr ZD24C1MA_Default_I2C_Addr | (((addr_page*Page_Size)16)1); //highest 1-bit access address placed into I2C addressHAL_I2C_Master_Transmit(hi2c1, ZD24C1MA_I2C_Addr, TAD, TLEN2, 2700); //Write dataPY_Delay_us_t(Delay_Param*1000);}}}
完成的main.c文件代码如下
/* USER CODE BEGIN Header */
/********************************************************************************* file : main.c* brief : Main program body******************************************************************************* attention** Copyright (c) 2023 STMicroelectronics.* All rights reserved.** This software is licensed under terms that can be found in the LICENSE file* in the root directory of this software component.* If no LICENSE file comes with this software, it is provided AS-IS.********************************************************************************/
//Written by Pegasus Yu in 2023
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include main.h/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include string.h
#include ZD24C1MA.h
/* USER CODE END Includes *//* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD *//* USER CODE END PTD *//* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
__IO float usDelayBase;
void PY_usDelayTest(void)
{__IO uint32_t firstms, secondms;__IO uint32_t counter 0;firstms HAL_GetTick()1;secondms firstms1;while(uwTick!firstms) ;while(uwTick!secondms) counter;usDelayBase ((float)counter)/1000;
}void PY_Delay_us_t(uint32_t Delay)
{__IO uint32_t delayReg;__IO uint32_t usNum (uint32_t)(Delay*usDelayBase);delayReg 0;while(delayReg!usNum) delayReg;
}void PY_usDelayOptimize(void)
{__IO uint32_t firstms, secondms;__IO float coe 1.0;firstms HAL_GetTick();PY_Delay_us_t(1000000) ;secondms HAL_GetTick();coe ((float)1000)/(secondms-firstms);usDelayBase coe*usDelayBase;
}void PY_Delay_us(uint32_t Delay)
{__IO uint32_t delayReg;__IO uint32_t msNum Delay/1000;__IO uint32_t usNum (uint32_t)((Delay%1000)*usDelayBase);if(msNum0) HAL_Delay(msNum);delayReg 0;while(delayReg!usNum) delayReg;
}
/* USER CODE END PD *//* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM *//* USER CODE END PM *//* Private variables ---------------------------------------------------------*/
I2C_HandleTypeDef hi2c1;UART_HandleTypeDef huart1;/* USER CODE BEGIN PV *//* USER CODE END PV *//* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_I2C1_Init(void);
static void MX_USART1_UART_Init(void);
/* USER CODE BEGIN PFP *//* USER CODE END PFP *//* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
uint8_t cmd0; //for status control
uint8_t * RData; //USB rx data pointer
uint32_t RDataLen; //USB rx data length
uint8_t * TData; //USB tx data pointer
uint32_t TDataLen; //USB tx data lengthuint8_t ZD24C1MA_Default_I2C_Addr 0xA0; //Pin A2A10uint32_t ZD24C1MA_Access_Addr 0; //ZD24C1MA access address (17-bit)uint8_t testdata[256];uint8_t URX;
/* USER CODE END 0 *//*** brief The application entry point.* retval int*/
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_I2C1_Init();MX_USART1_UART_Init();/* USER CODE BEGIN 2 */PY_usDelayTest();PY_usDelayOptimize();HAL_UART_Receive_IT(huart1, URX, 1);/* USER CODE END 2 *//* Infinite loop *//* USER CODE BEGIN WHILE */while (1){if(cmd1){cmd0;for(uint32_t j0; j256; j){testdata[j] j;}ZD24C1MA_Access_Addr 0; //Set access address hereZD24C1MA_Write(ZD24C1MA_Access_Addr, testdata, 256); //Write datamemset(testdata, 0, 256);ZD24C1MA_Read(ZD24C1MA_Access_Addr, testdata, 256); //Read dataHAL_UART_Transmit(huart1, testdata, 256, 2700);}if(cmd2){cmd0;for(uint32_t j0; j256; j){testdata[j] 255-j;}ZD24C1MA_Access_Addr 600; //Set access address hereZD24C1MA_Write(ZD24C1MA_Access_Addr, testdata, 256); //Write datamemset(testdata, 0, 256);ZD24C1MA_Read(ZD24C1MA_Access_Addr, testdata, 256); //Read dataHAL_UART_Transmit(huart1, testdata, 256, 2700);}PY_Delay_us_t(100);/* USER CODE END WHILE *//* 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};/** Configure the main internal regulator output voltage*/__HAL_RCC_PWR_CLK_ENABLE();__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE2);/** 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.PLL.PLLState RCC_PLL_ON;RCC_OscInitStruct.PLL.PLLSource RCC_PLLSOURCE_HSE;RCC_OscInitStruct.PLL.PLLM 25;RCC_OscInitStruct.PLL.PLLN 336;RCC_OscInitStruct.PLL.PLLP RCC_PLLP_DIV4;RCC_OscInitStruct.PLL.PLLQ 7;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();}
}/*** brief I2C1 Initialization Function* param None* retval None*/
static void MX_I2C1_Init(void)
{/* USER CODE BEGIN I2C1_Init 0 *//* USER CODE END I2C1_Init 0 *//* USER CODE BEGIN I2C1_Init 1 *//* USER CODE END I2C1_Init 1 */hi2c1.Instance I2C1;hi2c1.Init.ClockSpeed 400000;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();}/* USER CODE BEGIN I2C1_Init 2 *//* USER CODE END I2C1_Init 2 */}/*** brief USART1 Initialization Function* param None* retval None*/
static void MX_USART1_UART_Init(void)
{/* USER CODE BEGIN USART1_Init 0 *//* USER CODE END USART1_Init 0 *//* USER CODE BEGIN USART1_Init 1 *//* USER CODE END USART1_Init 1 */huart1.Instance USART1;huart1.Init.BaudRate 115200;huart1.Init.WordLength UART_WORDLENGTH_8B;huart1.Init.StopBits UART_STOPBITS_1;huart1.Init.Parity UART_PARITY_NONE;huart1.Init.Mode UART_MODE_TX_RX;huart1.Init.HwFlowCtl UART_HWCONTROL_NONE;huart1.Init.OverSampling UART_OVERSAMPLING_16;if (HAL_UART_Init(huart1) ! HAL_OK){Error_Handler();}/* USER CODE BEGIN USART1_Init 2 *//* USER CODE END USART1_Init 2 */}/*** brief GPIO Initialization Function* param None* retval None*/
static void MX_GPIO_Init(void)
{
/* USER CODE BEGIN MX_GPIO_Init_1 */
/* USER CODE END MX_GPIO_Init_1 *//* GPIO Ports Clock Enable */__HAL_RCC_GPIOH_CLK_ENABLE();__HAL_RCC_GPIOA_CLK_ENABLE();__HAL_RCC_GPIOB_CLK_ENABLE();/* USER CODE BEGIN MX_GPIO_Init_2 */
/* USER CODE END MX_GPIO_Init_2 */
}/* USER CODE BEGIN 4 */
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{if(huarthuart1){cmd URX;HAL_UART_Receive_IT(huart1, URX, 1);}}
/* 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 */
STM32范例测试
上述范例的测试效果如下 指令0x01不跨页写读 指令0x02跨页写读
STM32例程下载
STM32F401CCU6 I2C总线读写EEPROM ZD24C1MA例程
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