MibSPI1 is not Working

If you are using the MibSPI with the Mib unit enabled in slave mode, then you can only use the first transfer group and you need to have it triggered from SCS[0].  It looks like you have other SCS's setup which is likely the issue.

Thanks Anthony for the reply. I am using MibSPI in Master mode. I also tried to use HALCOGen code but i was unable to install XDS100V2 driver on 3 PCs. I have installed Code composer studio on those PCs but It didn't worked out as well. Should I enable only slave in Master mode as well?

Naveed

Sorry I missed the part where you said AARDVARK was a slave and assumed it was a master.

You should be able to leave the MibSPI as a master but I don't know the details of the aardvark setup as a slave.  Have you confirmed that AARDVARK is responding by checking the SOMI[0] pin on the MCU?   Also which board are you using and have you confirmed that the signal makes it back to SOMI[0]?

The XDS100v2 has nothing to do with the MibSPI so I would treat the XDS100v2 problems as unrelated.   Can't really comment on what the problem with the XDS100v2 is without knowing more about what the error is.   For starters - there is a 'Test Connection' button that comes up in CCS when you open the target configuration - and this is the first check to make - is it passing or failing and what if any error messages do you get.   If test connection fails but then when you open a debug session you get failures when you try to 'connect' to the device - then we need to know what those errors are.

Anthony,

For now lets leave the part of XDS100V2. The Aardvark setup is simple. I have just set phase, polarity and clock and enabled slave mode of Aardvark. Aardvark is working fine when i use it with SPI2. However, I have not confirmed the signals from MCU yet. 

To me it looks like an issue related to Pin Mux. If the device is working fine in Loopback mode, It ensures that TX, RX path is working fine. Since, I am unable to see data transmitted in wire so It looks like a Pin Muxing issue. Does this make sense?

I have also used Pin Muxing generated from HALCOGen but that appeared to fail as well. I am using ti_tmdxrm46hdk.

Do you have any working sample of MibSPI for this board?

Thanks,
Naveed

Anthony,

The issue was with S2 switch settings. I am using "Texas_Instruments-TMDXRM46HDK-datasheet" and it does not explain MibSPI1 routing. It only explains about Ethernet and USB on / off setting.

Table 2-11. S2 DIP Switch Functions

⁽¹⁾ S2:1 indicates slide 1 on the S2 DIP switch, S2:2 indicates slide 2 on the S2 DIP switch, and so on.

⁽²⁾ S2:2 and S2:3 cannot be enabled at the same time since those two ports have pinmux.

⁽³⁾ To use Ethernet, S2:4 should be enabled and all other have to be disabled.

The good thing is I am now able to transmit data but i am having completely strange behavior on receive side. I am only able to receive one Byte from Aardvark(slave). The rest of the received is same as TX. e.g. 

UINT16 txBuffer[] = {0x00, 0x11, 0x22};
UINT16 rxBuffer[3];

After completion of transaction the content of rxBuffer will be like

rxBuffer[3] = {Byte_From_Aardvark, 0x00, 0x11}

I have loopback mode disabled but don't know why this data is being loopedback on RX side.

I have attached the complete register dump of MibSPI1 4118.MibSPI_Reg_Dump.txt.

Thanks,

Naveed

Hi Naveed,

Great glad the first issue was as simple as the switch settings. 

I'm not sure that the register dump will help with the data receive issue you are having - at least not as a next step - that was something I was thinking of for the pin issue in case S2 didn't work out.

For the rx buffer issue - I am not sure how to help you with the information above.  Just seeing two arrays in RAM (one for txBuffer and one for rxBuffer) doesn't really say much about how the data is transferred from the MibSPI to/from these buffers.
Need a lot more information about that in order to suggest a next step.

Anthony,

I have configure Data format as 

character_length = 8
prescaler = 109
clock_phase and polarity = 0
shift_direction = MSB 
parity_enable = 0

I have configured the transfer group as 

trigger_source = TRIG_DISABLED
trigger_event = TRIG_ALWAYS
transfer_mode = Oneshot
length = 8

The functional pins as follows:

                      (1U << 0U)    /* SCS[0] */
                    | (0U << 1U)    /* SCS[1] */
                    | (0U << 2U)    /* SCS[2] */
                    | (0U << 3U)    /* SCS[3] */
                    | (0U << 4U)    /* SCS[4] */
                    | (0U << 5U)    /* SCS[5] */
                    | (1U << 8U)    /* ENA */
                    | (1U << 9U)    /* CLK */
                    | (1U << 10U)   /* SIMO[0] */
                    | (1U << 11U)   /* SOMI[0] */
                    | (0U << 17U)   /* SIMO[1] */
                    | (0U << 25U)); /* SOMI[1] */

The TX RAM control is initialized as follows:

buffer_mode = CONTINUOUS_MODE
chip_select_hold = 0
data_format = DATA_FORMAT0
chip_select = CS_0
group = 0

In next step i fill the TX RAM data and enable the transfer group. The data is transmitted correctly to Aardvark but the data sent by Aardvark is not received properly. 

Please let me know, If you require any specific information.

Thanks,

Naveed