unsigned int ADC_Read(unsigned char channel) { unsigned int result = 0; unsigned char i; unsigned char j; unsigned int out = 0; unsigned char nres = 0; switch(channel) // 选择ADC0832 { case 1: ADC0832_CS1 = 0; ADC0832_CS2 = 1; ADC0832_CS3 = 1; ADC0832_CS4 = 1; break; case 2: ADC0832_CS1 = 1; ADC0832_CS2 = 0; ADC0832_CS3 = 1; ADC0832_CS4 = 1; break; case 3: ADC0832_CS1 = 1; ADC0832_CS2 = 1; ADC0832_CS3 = 0; ADC0832_CS4 = 1; break; case 4: ADC0832_CS1 = 1; ADC0832_CS2 = 1; ADC0832_CS3 = 1; ADC0832_CS4 = 0; break; default: return 0; } ADC0832_CLK = 0; ADC0832_DO = 1; ADC0832_CLK = 1; ADC0832_CLK = 0; ADC0832_DO = 1; ADC0832_CLK = 1; ADC0832_CLK = 0; result=0; 修改这段代码，使得4个ADC0832分别接收4个MPX4115的压力信号

首先，需要将MPX4115的压力信号接到ADC0832的输入端口上。假设分别将MPX4115的压力信号接到了ADC0832的CH0、CH1、CH2、CH3输入端口上。

然后，需要修改ADC_Read函数的switch语句部分，使得不同的通道对应不同的ADC0832输入通道。修改后的代码如下：

switch(channel)     
{         
    case 1:             
        ADC0832_CS1 = 0;
        ADC0832_CS2 = 1;
        ADC0832_CS3 = 1;
        ADC0832_CS4 = 1;
        break;         
    case 2:             
        ADC0832_CS1 = 1;
        ADC0832_CS2 = 0;
        ADC0832_CS3 = 1;
        ADC0832_CS4 = 1;
        break;         
    case 3:             
        ADC0832_CS1 = 1;
        ADC0832_CS2 = 1;
        ADC0832_CS3 = 0;
        ADC0832_CS4 = 1;
        break;         
    case 4:             
        ADC0832_CS1 = 1;
        ADC0832_CS2 = 1;
        ADC0832_CS3 = 1;
        ADC0832_CS4 = 0;
        break;         
    default:             
        return 0;     
} 

// 将ADC0832的CH0、CH1、CH2、CH3输入通道对应到MPX4115的压力信号
switch(channel)     
{         
    case 1:             
        ADC0832_CLK = 0;
        ADC0832_DO = (MPX4115_CH0 > 0) ? 1 : 0;
        ADC0832_CLK = 1;
        ADC0832_CLK = 0;
        ADC0832_DO = (MPX4115_CH0 > 1) ? 1 : 0;
        ADC0832_CLK = 1;
        ADC0832_CLK = 0;
        ADC0832_DO = (MPX4115_CH0 > 2) ? 1 : 0;
        ADC0832_CLK = 1;
        ADC0832_CLK = 0;
        ADC0832_DO = (MPX4115_CH0 > 3) ? 1 : 0;
        ADC0832_CLK = 1;
        break;         
    case 2:             
        ADC0832_CLK = 0;
        ADC0832_DO = (MPX4115_CH1 > 0) ? 1 : 0;
        ADC0832_CLK = 1;
        ADC0832_CLK = 0;
        ADC0832_DO = (MPX4115_CH1 > 1) ? 1 : 0;
        ADC0832_CLK = 1;
        ADC0832_CLK = 0;
        ADC0832_DO = (MPX4115_CH1 > 2) ? 1 : 0;
        ADC0832_CLK = 1;
        ADC0832_CLK = 0;
        ADC0832_DO = (MPX4115_CH1 > 3) ? 1 : 0;
        ADC0832_CLK = 1;
        break;         
    case 3:             
        ADC0832_CLK = 0;
        ADC0832_DO = (MPX4115_CH2 > 0) ? 1 : 0;
        ADC0832_CLK = 1;
        ADC0832_CLK = 0;
        ADC0832_DO = (MPX4115_CH2 > 1) ? 1 : 0;
        ADC0832_CLK = 1;
        ADC0832_CLK = 0;
        ADC0832_DO = (MPX4115_CH2 > 2) ? 1 : 0;
        ADC0832_CLK = 1;
        ADC0832_CLK = 0;
        ADC0832_DO = (MPX4115_CH2 > 3) ? 1 : 0;
        ADC0832_CLK = 1;
        break;         
    case 4:             
        ADC0832_CLK = 0;
        ADC0832_DO = (MPX4115_CH3 > 0) ? 1 : 0;
        ADC0832_CLK = 1;
        ADC0832_CLK = 0;
        ADC0832_DO = (MPX4115_CH3 > 1) ? 1 : 0;
        ADC0832_CLK = 1;
        ADC0832_CLK = 0;
        ADC0832_DO = (MPX4115_CH3 > 2) ? 1 : 0;
        ADC0832_CLK = 1;
        ADC0832_CLK = 0;
        ADC0832_DO = (MPX4115_CH3 > 3) ? 1 : 0;
        ADC0832_CLK = 1;
        break;         
    default:             
        return 0;     
} 

其中，MPX4115_CH0、MPX4115_CH1、MPX4115_CH2、MPX4115_CH3分别表示四个MPX4115的压力信号，假设其取值范围为0~15，表示0~5V的输入电压分别经过了ADC的0~15个刻度，需要将其转换为二进制信号输入到ADC0832中。

具体实现方式是：首先将ADC0832的CLK置为0，然后判断MPX4115的压力信号是否大于当前输入刻度，如果大于，则将DO置为1，否则置为0；然后将CLK置为1，再将CLK置为0，依次输入四个信号位，最后将CLK置为1，完成一次输入。