这两个引脚是什么高可能是错误的？

你把RB4转换成数字模式了吗？



      以下为原文

    Did you switch RB4 to digital mode?
 

注意，您的两个注释是错误的，应该是：并且还要注意，如果您的时钟是16MHz，那么SSP1ADD应该是39，也就是0x27，以获得100kHz。



      以下为原文

    Note, two of your comments are wrong.
SSP1CON1    = 0x28;        // MSSP Enable as IIC Master at FOSC/4
SSP1CON2    = 0x00;
SSP1ADD         = 0x28;      // Set I2C address, Set IIC Bus for 100 kHz
should be:
SSP1CON1    = 0x28;        // MSSP Enable as IIC Master at FOSC/(4 * (SSPxADD+1))
SSP1CON2    = 0x00;
SSP1ADD         = 0x28;      // Set IIC Bus for 100 kHz
 
and also note, if your clock is 16MHz, then SSP1ADD should have been 39, which is 0x27, to get 100kHz.

谢谢大家回复我的信息。谢谢QBH。问题被你的消息解决了。我真傻…不要将RB4配置为数字输入……只要我配置这个管脚作为输入，MSSP:IIC主机就开始工作。再次感谢您！！！！我必须使用ANSELB＝0；指令将PUTB配置为数字输入引脚。对于其他芯片，相应地配置引脚。这将有助于许多陷入类似问题的人。我提到过许多具有相同问题的帖子，但是没有人能解决这个问题，您帮助我解决了它，谢谢。谢谢DarioG，我本来可以张贴整个代码，但是它太大了。我会发送整个帖子，但它包含许多与产品设计相关的内容，这会使正在寻找这个问题解决方案的其他人感到困惑。如果你仍然想要它，我会张贴它，没问题。但是谢谢你的答复。由于MSSP正在处理SDA和SCL引脚，我不必使用PORTx和LATx指令，但是谢谢你的答复。问题解决了！！！！感谢QBH，以纠正评论中的错误。



      以下为原文

    Thanks to all of you for replying to me message.
 
Thanks QBH. The problem was solved by your message. How silly of me ... NOT configuring the RB4 as Digital Input....as soon as I configured this pin as input, the MSSP:IIC Master started working. Thanks to you again !!!
 
I had to use the ANSELB = 0; instruction to configure the PORTB as Digital Input Pin. For other chips, configure the pins accordingly.
 
This will help many people who were stuck up similar problem. I have referred to many posts with the same problem, but nobody had a solution for this problem, you helped me to solve it, thank you.
 
Thanks DarioG, I would have posted the whole code, but it was too huge. I would send the whole post, but it contains a lot many things related to the design of the product, which will confuse the others who are looking for a solution to this problem. If you still want it, I will post it, no problem. But thanks for your reply.
Since MSSP is taking care of SDA and SCL pins, I don't have to use the PORTx and LATx instructions, but thanks for your replies.
 
PROBLEM IS SOLVED !!!
 
Thanks QBH, for correcting the mistakes in the comments.