XMC™ Forum Discussions

Hello
The trouble is that on the board KIT_XMC48_RELAX_ECAT_V1 it is impossible to activate any CAN nodes, except Node 1, for which a transceiver is provided on the board.

I use DAVE IDE and MULTICAN_CONFIG application to configure CAN Nodes. Its no issues with Node 1,
it works properly, but i cant see any tx data on the oscilloscope from any other node (0,2,3,4,5) with
identity settings (exept gpio, of course).
In loopback mode, information is received from all nodes, however, in normal operation, data
transmitted only from node 1 while the configuration of the remaining nodes is absolutely identical.
All gpiol pins, assigned to other nodes, are not occupied by any other resources.
The correct configuration of the pins is verified with datasheet values ​​of the RXSEL, and its fully consistent with the
MULTICAN_CONFIG configuration-based generated code.
I dont see any reasons to block data stream from nodes 0,2,3,4,5 in XMC4800 datasheet.

So, is it possible to work with more then one CAN node (and that node is Node 1) on KIT_XMC48_RELAX_ECAT_V1? Pay attention on
that i trying to make CAN rx and CAN tx gpio work, of course i will attach it to the external tranciever after success. Show Less

We are using multiple IN EPs in our design. I configure the endpoints in the USB_Descriptor_Configuration_t configuration_descriptor in Dave/Generated/USBD_WINUSB/winusb/descriptors.c and h file.
The endpoints show up ok in Windows but communication on other EPs than the first does not work (data gets stuck in the EP, USBD_Endpoint_t ep->InInUse is true).
Using the same number of endpoints on a competitor MCU works with no issues using the same test application in Windows.
The reported error in Windows is: ERROR_GEN_FAILUE 31 (ox1F) A device attached to the sustem is not functioning.
Communication on the first endpoint is working well.
Any ideas what could be causing this behaviour?

This is the winusb configuration:
.winusb_interface =
{
.Header = {.Size = sizeof(USB_Descriptor_Interface_t),
.Type = DTYPE_Interface},
.InterfaceNumber = 0,
.AlternateSetting = 0,
.TotalEndpoints = 3,
.Class = USB_CSCP_VendorSpecificClass,
.SubClass = USB_CSCP_NoDeviceSubclass,
.Protocol = USB_CSCP_NoDeviceProtocol,
.InterfaceStrIndex = NO_DESCRIPTOR
},


This is the configurations of the IN EPs
.winusb_data_in_endpoint =
{
.Header = {.Size = sizeof(USB_Descriptor_Endpoint_t),
.Type = DTYPE_Endpoint},
.EndpointAddress = (ENDPOINT_DIR_IN | WINUSB_TX_EPNUM),
.Attributes = (EP_TYPE_BULK | ENDPOINT_ATTR_NO_SYNC | ENDPOINT_USAGE_DATA),
.EndpointSize = WINUSB_TXRX_EPSIZE,
.PollingIntervalMS = 0x00
}
.winusb_data_in2_endpoint =
{
.Header = {.Size = sizeof(USB_Descriptor_Endpoint_t),
.Type = DTYPE_Endpoint},
.EndpointAddress = (ENDPOINT_DIR_IN | WINUSB_TX2_EPNUM),
.Attributes = (EP_TYPE_BULK | ENDPOINT_ATTR_NO_SYNC | ENDPOINT_USAGE_DATA),
.EndpointSize = WINUSB_TXRX_EPSIZE,
.PollingIntervalMS = 0x00
}
WINUSB_TXRX_EPSIZE is 64
WINUSB_TX1_EPNUM is 2
WINUSB_TX2_EPNUM is 3

typedef struct
{
USB_Descriptor_Configuration_Header_t config;
USB_Descriptor_Interface_t winusb_interface;
USB_Descriptor_Endpoint_t winusb_data_out_endpoint;
USB_Descriptor_Endpoint_t winusb_data_in_endpoint;
USB_Descriptor_Endpoint_t winusb_data_in2_endpoint;
} USB_Descriptor_Configuration_t; Show Less

Hello everyone,

I have a simple task -> transmit data
uint16_t srcBuffer[1024] -> UART at 1Mbod speed.

I took example "DMA003_USIC" from this thread
MEMORY->UART
I migrate it to my XMC4500 Relax Kit, create TestArray by srcBuffer=16*i+1 and catch transmitted data by Realterm.

Data transmitted regularly through UART, but their integrity is NOT OK.
Approximately first 30 words transmitted fine, but then some amount of data missed, and so on.

I have impression that something wrong with handshake, so FIFO buffer is overwritten on some reason.

BR
K Show Less

Hello,

I´m trying to receive an extern interrupt.
I used Dave APPs(- EventDedector ; EventGenerator; NVIC; DIGITAL IO)

I never get into the service routine... I used example : XMC4500_RelaxKit_ERU_ISR

Its not working on XMC4300 Board with button 2 but i changed it to a other Pin.

Im using a jumper wire (3,3V - Pin0.6) but without getting in InterruptService Routine....

Someone have experience with that case ????? Show Less

Hi,

I wold like to select an external oscillator for XMC4800 device.

I want to use the DSX321G with the following specification.
https://www.kds.info/product/dsx321g/



My application is ESC controller for robot.

Could you tell me if this oscillator can satisfy this application?

Thanks. Show Less

Hi,
Is it possible to synchronize the conversion between 2 ADC_MEASUREMENT_ADV Dave apps?
I see "Sync. Conversion" tab but not sure how to use it. Is there an app note perhaps?
Using XMC1400 series.

Cheers! Show Less

Hello, everyone.

I have a question about XMC4200 CAN bit timing.
Could you please guide me, how can I switch it at runtime?
Specially, if my hardware is already initialized by DAVE's init functions.
Namely, I need to reinit my CANs from 83333 to 500000.
Here is my code, which does not work:

void CANxUpdateBaudrate( const CAN_NODE_t* handle, uint32_t baudrate )
{
  //Disable CAN node participation in CAN traffic
  XMC_CAN_NODE_SetInitBit(handle->node_ptr);
  //Function to configure the baud rate based on UI configuration
  //Keep sample_point and sjw as they was before, update baudrate.
  CAN_NODE_ConfigBaudrate(handle, baudrate, handle->baudrate_config->sample_point, handle->baudrate_config->sjw);
  //Enable CAN node participation in CAN traffic
  XMC_CAN_NODE_ResetInitBit(handle->node_ptr);
}

This is usage example:

CANxUpdateBaudrate( &CAN1, 500000 );

NOTE: my CANs works fine at 83333, I have to update

  CAN1_BitTimeConfig.baudrate = 83333;
  CAN2_BitTimeConfig.baudrate = 83333;

in main.c before DAVE_Init(), because GUI does not allow to set CAN's baudrate less than 100k.
It also works fine at 500000 baud, if inited by DAVE_Init().

Now the method, which I use to check how it works:
I add 2 MOs on my CANs: CAN1, CAN2, one for receive and transmit respectively.
Then I add Rx and Tx events on needed MOs and link them to corresponding INTERRUPTs.
When I do so, and enable these INTERRUPTs, they start to occur and receive CAN frames as I expect.
I'm sending packets every 10 ms and all of them are received.


This works fine with settings inited by GUI both at 83333 and 500000 bauds.
But do not work when I try to switch baudrate. At least INTERRUPTs do not occurs.

For example, I'm starting to send infinit number of frames at 500000 baud/s, and while CAN initialized at 83333 it obviously does not receive anything. But when CAN switches to 500000 it still does not receive anything. Show Less