topic Re: how to send 9-bit data to SCI in Microcontrollers_Debugger in CodeWarrior for MCU

how to send 9-bit data to SCI in Microcontrollers_Debugger

phantomgz — Mon, 07 Nov 2011 15:40:44 GMT

I just test my project in codewarrior software simulator, I want to simulate SCI transmission.

the help said module including: 8- or 9-bit length data codes,

I send data with "scdi 1aa", but I never read SCIxC3.R8 being set.

Cai.

Re: how to send 9-bit data to SCI in Microcontrollers_Debugger

bigmac — Mon, 07 Nov 2011 23:56:05 GMT

Hello Cai,

The ninth data bit (bit-8) for sending is determined by the bit setting for SCIxC3_T8. The register SCIxD contains only 8 bits. To send the 9-bit value 0x01AA from the MCU, you would use the following code.

SCIxC3_T8 = 1;

SCIxD = 0xAA;

For both 9-bit send and receive, 9-bit mode is enabled by setting the control bit SCIxC1_M.

Regards,

Mac

Re: how to send 9-bit data to SCI in Microcontrollers_Debugger

AirDragon — Tue, 08 Nov 2011 08:33:08 GMT

Please note that if you have parity enabled, your 9th bit is used for parity (and the rest are data bits).

Took me a while to figure that out when trying to interface with HyperTerminal...

Re: how to send 9-bit data to SCI in Microcontrollers_Debugger

phantomgz — Tue, 15 Nov 2011 21:38:16 GMT

thanks for reply.

and again I don't have a real hardware board, just run in full chip software simulation.

9-bit wasn't use for parity check, it's use for address mark,

I want to send some data in "Real-Time Debugger" at "Command" window to test my program.

I can send a data with "SCDI $aa" now , but I want to something like "SCDI $1aa" to active 9-bit I can read in SCIxC3_T8 in my

program.

and my PE component setting:

Parity = none;

Width = 9bits;

Stop bit =1;

Wakeup condition = Address mark wakeup

...

Cai.