SPC560D UART

[Patriks]

Posted on October 16, 2014 at 12:24

Hello,

I have some problems understanding and using the UART HAL component.   The test application for the SPC560D sends ''Hello World'' with the chnWriteTimout() function. To send the value 0x55, I wrote

chnWriteTimeout(&SD1, (uint8_t *)

0x55

, 2, TIME_INFINITE);

But this did not work. I doesn´t matter which value I tried to send, I am always receiving a different value. Only when I am sending characters, the received data equals the sended data. What is wrong with my command?

My second question is: is it possible to write my own UART driver? The driver from the library is too complex for my application. I just want to periodically send data triggered by a timer interrupt and to work with the UART interrupt if I receive data. Therefore, I started to write my own driver. So I deactivated SERIAL in the configuration, but I am not able to configure LinFlex. Setting LinFlex to initialization mode by setting  

LINFLEX_0.

LINCR1

.

B

.

INIT

= 1;

did not work. What would be the correct steps to be able to configure the LinFlex component?

Best regards,

Patrik

[Patriks]

Posted on October 23, 2014 at 11:20

Hello,

Finally, I was able to understand how I can adapt the UART component to send the commands I needed. Currently, I am using two interfaces: UART and SPI. The SPI communication runs periodically every 1ms. When I additionally send some commands over UART, the program always jumps to the adress 0x000000E0 after a view milliseconds and hangs there. Looking in the out.map file, i found at this memory entry several _IVOR entries. Does anybody now what the reason for the jump to this adress could be and how I can avoid that? Best regards, Patrik

[Patriks]

Posted on October 23, 2014 at 16:19

Hello,

I just found out, that the controller (SPC560B) shows the same behaviour when I use only UART in software. I sent continously data with hyperterminal to the controller and I got the same error. As software project, I used the discovery board demo for SPC560B and adapted it for UART receive. Is this probably an error in the ST serial driver?

[Erwan YVIN]

Posted on November 14, 2014 at 14:29

Hello Patrik ,

it is important to put the exact size of your local array in this following function :

chnWriteTimeout(&SD1, (uint8_t *) 0x55, 1, TIME_INFINITE);

Do you reproduce the similar issue with the application :

ChibiOS-RT SPC560Dxx Test Application for Discovery or ChibiOS-RT SPC560Bxx Test Application for Discovery ? anyway , we will check this issue. Best Regards Erwan

[Erwan YVIN · Accepted solution]

Posted on November 14, 2014 at 15:50 Hello Patrik, No problem has been noticed chnWriteTimeout is waiting for a pointer on the data to send. if you want to send a Hexadecimal, use a pointer. (cf code below)

const

uint8_t constHexToSend = 0x55;
chnWriteTimeout(&SD1, (uint8_t *)&constHexToSend, 1, TIME_INFINITE);

Best regards Erwan