kf8a100ftn芯片的iic中断模式读取stcn75芯片代码

以下是基于 kf8a100ftn 芯片的 IIC 中断模式读取 STCN75 芯片的代码示例：

#include <stdio.h>
#include "kf8a100ftn.h"

#define STCN75_ADDRESS 0x90

volatile int iic_flag = 0;
volatile int iic_data = 0;

void IIC_ISR() {
    int status;

    status = KF8A100FTN->IIC.IICSR;
    if (status & 0x08) { // IIC complete
        iic_data = KF8A100FTN->IIC.IICDR;
        iic_flag = 1;
    }
}

void STCN75_Read(int address, int *data) {
    int iic_data_low, iic_data_high;

    iic_flag = 0;

    // Send start bit
    KF8A100FTN->IIC.IICCR = 0x90;
    KF8A100FTN->IIC.IICDR = STCN75_ADDRESS | 0x01;

    // Wait for IIC to complete
    while (!iic_flag);

    iic_data_low = iic_data;

    iic_flag = 0;

    // Send register address
    KF8A100FTN->IIC.IICDR = address;

    // Wait for IIC to complete
    while (!iic_flag);

    iic_flag = 0;

    // Send repeated start bit
    KF8A100FTN->IIC.IICCR = 0x98;
    KF8A100FTN->IIC.IICDR = STCN75_ADDRESS;

    // Wait for IIC to complete
    while (!iic_flag);

    iic_data_high = iic_data;

    iic_flag = 0;

    // Receive data
    KF8A100FTN->IIC.IICCR = 0x88;

    // Wait for IIC to complete
    while (!iic_flag);

    *data = (iic_data_high << 8) | iic_data_low;

    // Send stop bit
    KF8A100FTN->IIC.IICCR = 0x80;
}

int main() {
    int temperature;

    KF8A100FTN->IIC.IICSR = 0x00; // Disable IIC
    KF8A100FTN->IIC.IICCR = 0x80; // Enable IIC, master mode, no interrupt
    KF8A100FTN->IIC.IICMR = 0x0A; // IIC clock divider = 10
    KF8A100FTN->IIC.IICIER = 0x01; // Enable IIC interrupt

    KF8A100FTN->SYS.PINTEN = 0x08; // Enable external interrupt 3
    KF8A100FTN->SYS.PINTMD = 0x08; // External interrupt 3 is falling edge triggered
    KF8A100FTN->SYS.IPRST = 0x08; // Clear external interrupt 3 flag
    KF8A100FTN->SYS.IPRMD = 0x00; // Enable external interrupt 3

    __asm__("sei"); // Enable interrupts globally

    // Read temperature from STCN75
    STCN75_Read(0x00, &temperature);

    printf("Temperature: %d\n", temperature);

    return 0;
}

这段代码使用了 kf8a100ftn 芯片的 IIC 接口模拟了一个 IIC 主机，通过 IIC 总线与 STCN75 芯片进行通信，读取了 STCN75 芯片的温度数据。在代码中使用了外部中断来触发 IIC 中断，使用了全局变量 iic_flag 和 iic_data 来实现 IIC 中断数据的传递。