PIC18F2620 I2C主总线电压不能驱动

有很多关于这个的帖子在网上，我已经Google几天了。ASM I2C主控器（硬件外设），SLDA/SCL的线路低电压大约为1V。有人建议我曾在同一个线上与另一个驱动程序战斗，但是这个配置只是连接到上拉。我想看到一个开始条件，就这样。没有其他设备。TrISC＆LT；3:4& GT；都是输入，我已经与LATC/PORTC混淆，尝试了在勘误表中的方法，但仍然不能驱动这些低。似乎是一个明显的分压器（在当前配置中的端口电阻与端口电阻）。我可以发布代码，但有人有一个简单的例子，它只是将设备配置到一个点，我可以检查总线空闲和设置SPEN，并看到一个开始？这是固定的。



      以下为原文

    There are a lot of posts about this on the internet, I've Googled for days now.

ASM I2C master (hardware peripheral), line low voltage for both SDA/SCL is about 1V. It's been suggested that I was at one time fighting with another driver on the line, but this configuration is just connected to pullups. I wanted to see a start condition, that's all. There are no other devices. TRISC<3:4> are both inputs, I've messed with LATC/PORTC, tried the method in the Errata but still can't drive these low. Seems like an obvious voltage divider (pull-ups vs port resistance in current config). I can post code, but does someone have a simple, example that will just configure the device to a point where I can check for bus idle and set SPEN and see a start?


This is fixed.