帮我写一个STM32L431 I2C主机通讯程序，要求设备地址位0x53，数据长度2048

好的，我可以回答这个问题。以下是一个简单的STM32L431 I2C主机通讯程序，设备地址为0x53，数据长度为2048：

#include "stm32l431xx.h"

#define I2C_ADDRESS 0x53
#define DATA_LENGTH 2048

uint8_t data[DATA_LENGTH];

void I2C_Init(void)
{
// Enable I2C clock
RCC->APB1ENR1 |= RCC_APB1ENR1_I2C1EN;

// Configure I2C pins
GPIOB->MODER &= ~(GPIO_MODER_MODE6 | GPIO_MODER_MODE7);
GPIOB->MODER |= (GPIO_MODER_MODE6_1 | GPIO_MODER_MODE7_1);
GPIOB->AFR[0] |= (4 << GPIO_AFRL_AFSEL6_Pos) | (4 << GPIO_AFRL_AFSEL7_Pos);

// Configure I2C peripheral
I2C1->CR1 &= ~I2C_CR1_PE;
I2C1->TIMINGR = 0x00707CBB; // Standard mode timing
I2C1->CR2 |= I2C_CR2_AUTOEND | (I2C_ADDRESS << 1);
I2C1->CR1 |= I2C_CR1_PE;
}

void I2C_Write(uint8_t* data, uint16_t length)
{
uint16_t i = 0;

while (length > 0)
{
// Wait for TXE flag to be set
while (!(I2C1->ISR & I2C_ISR_TXE));

// Write data to DR register
I2C1->TXDR = data[i++];

// Decrement length
length--;
}

// Wait for TC flag to be set
while (!(I2C1->ISR & I2C_ISR_TC));
}

void I2C_Read(uint8_t* data, uint16_t length)
{
uint16_t i = 0;

while (length > 0)
{
// Wait for RXNE flag to be set
while (!(I2C1->ISR & I2C_ISR_RXNE));

// Read data from DR register
data[i++] = I2C1->RXDR;

// Decrement length
length--;
}

// Wait for TC flag to be set
while (!(I2C1->ISR & I2C_ISR_TC));
}

int main(void)
{
// Initialize I2C peripheral
I2C_Init();

// Write data to device
I2C_Write(data, DATA_LENGTH);

// Read data from device
I2C_Read(data, DATA_LENGTH);

while (1);

return 0;
}