STM32 HAL API

GPIO

• HAL_GPIO_TogglePin(GPIOA, GPIO_PIN_2);

• HAL_GPIO_WritePin(GPIOA, GPIO_PIN_3, GPIO_PIN_RESET);
• HAL_GPIO_ReadPin(GPIOA, GPIO_PIN_3);

Delay

• HAL_Delay(100);

I2C

• HAL_I2C_Mem_Write
• HAL_I2C_Mem_Read

HAL_I2C_Mem_Write(&hbus_i2c1, DevAddr, Reg, I2C_MEMADD_SIZE_8BIT, pData, Length, BUS_I2C1_POLL_TIMEOUT)

• I2C_MEMADD_SIZE_8BIT 固定方式
• BUS_I2C1_POLL_TIMEOUT = 0x1000U
• uint8_t * const pICRef
• pICRef Pointeron a uint8_t used to return the ST25DV ID.

• HAL_I2C_Mem_Read(&I2C2, 0x0017, Reg, I2C_MEMADD_SIZE_8BIT, pData, Length, 0x1000U)

Example 2

#define ADDR_24LCxx_Read 0xA1
#define BufferSize 0x100

uint8_t ReadBuffer[BufferSize];

HAL_I2C_Mem_Read(&hi2c1, ADDR_24LCxx_Read, 0, I2C_MEMADD_SIZE_8BIT,ReadBuffer,BufferSize, 0x10);

• 第一个参数为I2C操作句柄。
• 第二个参数为E2PROM的写操作设备地址。
• 第三个参数为内存地址，
• 第二个参数为内存地址长度，E2PROM内存长度为8bit
• 第四个参数为数据缓存的起始地址，
• 第五个参数为传输数据的大小，
• 第六个参数为操作超时时间。

HAL_StatusTypeDef HAL_I2C_Mem_Read  ( I2C_HandleTypeDef *  hi2c,  
 uint16_t  DevAddress,  
 uint16_t  MemAddress,  
 uint16_t  MemAddSize,  
 uint8_t *  pData,  
 uint16_t  Size,  
 uint32_t  Timeout  
 )   

Read an amount of data in blocking mode from a specific memory address. Parameters:

• hi2c Pointer to a I2C_HandleTypeDef structure that contains the configuration information for the specified I2C.
• DevAddress Target device address: The device 7 bits address value in datasheet must be shifted to the left before calling the interface
• MemAddress Internal memory address
• MemAddSize Size of internal memory address
• pData Pointer to data buffer
• Size Amount of data to be sent
• Timeout Timeout duration

AT24C02

• HAL_I2C_Mem_Write(&hi2c1, 0XA0,1,I2C_MEMADD_SIZE_8BIT,sbuf,1,0xff);
• HAL_Delay(5);
• HAL_I2C_Mem_Read(&hi2c1, 0xA0, 1, I2C_MEMADD_SIZE_8BIT, rbuf, 1,0xfff);
• HAL_Delay(1000);

HAL_I2C_Mem_Read(

• I2C_HandleTypeDef *hi2c, // 使用的 I2C 模块的 Handle 的指针
• uint16_t DevAddress, // I2C 器件的地址，这里是 24C02 的地址 0xA0
• uint16_t MemAddress, // 存储器内部地址
• uint16_t MemAddSize, // 存储器内部地址位数 8BIT or 16BIT ?
• uint8_t *pData, // 接收数据缓冲区指针
• uint16_t Size, // 接收数据长度=
• uint32_t Timeout // 超时设置

);