topic Re: How to get SCI 7 to send data. in S12 / MagniV Microcontrollers

How to get SCI 7 to send data.

dastek — Tue, 11 May 2021 09:11:02 GMT

Hi,

I am using MC9s12XEQ384 in 112 pin package.

I can send data on SCI0, SCI4 and SCI5. But SCI7 looks like it is not initialised.

This is what my initialisation looks like :

SPI0CR1 = 0; // Disable SPI
SPI1CR1 = 0;
SPI2CR1 = 0;

PTLRR = 0; // Port L route register

SCI7SR2 = 0x00; // AMAP = 0x80;

SCI0BD = Baud115200; // Fast Baud.
SCI4BD = Baud115200; // Load SCIxBDH and SCIxBDL registers
SCI5BD = Baud115200;
SCI6BD = Baud115200;
SCI7BD = Baud115200;

SCI0CR1 = 0; // 1 Start, 8 Data, 1 Stop bits. Parity disabled
SCI4CR1 = 0;
SCI5CR1 = 0;
SCI6CR1 = 0;
SCI7CR1 = 0;

I am sending data as follows :

if ((SCI7SR1 & TDRE) != 0) // Transmit data register empty
SCI7DRL = 0x55;

if ((SCI6SR1 & TDRE) != 0) //
SCI6DRL = 0x55;

if ((SCI4SR1 & TDRE) != 0) //
SCI4DRL = 0xaa;

if ((SCI5SR1 & TDRE) != 0) //
SCI5DRL = 0xaa;

if ((SCI0SR1 & TDRE) != 0) //
SCI0DRL = 0x55;

The TDRE bit in SCI7SR1 is never set.
Which to points to initialisation.

What am I missing?

Re: How to get SCI 7 to send data.

dastek — Fri, 14 May 2021 09:11:22 GMT

Does someone have Processor Expert ?

I would like to see how it initialises SCI0 and SCI7.

I can get SCI0, 4 and 5 to initialise and to send data.

Thanks

Re: How to get SCI 7 to send data.

dastek — Fri, 14 May 2021 09:34:09 GMT

I think I have found it.

My processor does not have SCI 6 and 7

Re: How to get SCI 7 to send data.

StanoA — Fri, 14 May 2021 12:34:21 GMT

Yes, you are right.

As you can see in Table D-2 of Ref Manual: https://www.nxp.com/docs/en/data-sheet/MC9S12XEP100RMV1.pdf

And pinout explanation:

Versions with 6 SCI modules will have SCI0, SCI1, SCI2, SCI3, SCI4 and SCI5.

So you can use only 6 SCI modules.