PIC24FJ128GC006 AN12/B12作为PADC的输入

我试图将引脚B12配置为PADC1的输入。使用MCC将其配置为输入，使其成为模拟端口。使用MCC我构建了PADC1，以使用由AN12组成的单个列表，该列表是端口B位12。当我运行代码时，PADC1对样本列表进行采样，并且我得到一个非常小的值0x01F在ADRES0in中，TrISB和ANSB比特被设置为它的输出。我在那个端口上有一个温度传感器，它输出大约0.75VDC，所以它应该是一个更大的值（比0x1F大）。我看了看配置位，看看是否有可能影响引脚的方向，也许有人可以提供建议？谢谢！SteveShere是主代码循环。SYSTEM_Initialize调用初始化并启动PADC[/code]的代码



      以下为原文

    I am trying to configure pin B12 as an input for the PADC1.
using MCC I configure it as an input, made it an analog port.
using MCC I built the PADC1 to use a single list consisting of AN12 which is port B bit 12.
When I run the code, it PADC1 samples the sample list and I get a very small value 0x01F in ADRES0
in addition the TRISB and ANSB bits for are set as if its an output.  I have a temperature sensor on that port which is putting out about 0.75 VDC so it should be a larger value (than 0x1F).
Since the TRISB bits show it as an output, i assume that something else is overriding the port pin but I can not figure out what. I looked thur the config bits to see if anything there might influence the pin direction, perhaps someone can offer a suggestion? thanks!

SteveS


here is the main code loop..
SYSTEM_Initialize calls the code that initializes and starts the PADC
int main(void)
{
     // initialize the device
    SYSTEM_Initialize();
    uint16_t sl0ResultBuffer[2];;
    uint8_t tableregindex;
    uint8_t slsize;

    tableregindex = 0;
    slsize = 1;

    while(1)
    {
        if( PADC1_SampleList0ConversionResultBufferGet(sl0ResultBuffer, tableregindex, slsize))
        {
            PADC1_Tasks();
        }
    }
[/code[/code]