topic Re: Can anyone explain MPC8306's uart in PowerQUICC Processors

Can anyone explain MPC8306's uart

leimao — Mon, 06 Jan 2014 11:20:12 GMT

In one address 0x4500, It have 3 register. receiver buffer register. transmitter holding registers and Divisor least significant byte register. The 3 register in one address. How could I deal with that? I don't know what register I read or write

Re: Can anyone explain MPC8306's uart

addiyi — Mon, 06 Jan 2014 15:52:40 GMT

Before reading from that address you should look at UIIR register. Please take a look in 8306 RM at chapter 18.3.1.5. Also, you can take a look in 8306SOM_serial project included in CW ( serial driver is already implemented in CodeWarrior as an example).

Adrian

Re: Can anyone explain MPC8306's uart

scottwood — Thu, 09 Jan 2014 23:08:27 GMT

That register is normally the transmitter holding register when you write to it, and the receiver buffer register when you read from it. When you put the UART into a special mode it becomes the divisor least significant byte register.

Note that this UART is almost identical to a standard 16550 (e.g. as found on PCs), so any examples or tutorials you find for programming a standard UART would be applicable.