Question about using interrupt to receive data on tms570ls1224

Hi,

 1)  I'm not too clear on your question how do you know if the interrupt has arrived on channel 9. When the GIO detects a low, it will generate an interrupt to the VIM module on its channel 9. Think of the VIM as a funnel that will eventually generate an IRQ to the CPU. When the CPU is interrupted it will fetch the interrupt vector for GIO provided by the VIM module. You can place a breakpoint in gioHighLevelInterrupt() in gio.c. If CPU is interrupted, the CPU wlll branch to gioHighLevelInterrupt(). I'm assuming that you have configured for GIO High Level interrupt in HalCoGen since you said you wanted the GIO interrupt at channel 9. Note that there is also the GIO Low Level interrupt mapped to channel 23. By default, the HalCoGen map the GIO interrupts to the low priority.

 Here is one example project for your reference to generate GIO interrupt. 1563.Push_Button_Low.zip

2) For ADS1271 you will need to consult with the Precision Data Converter Forum.

3) dataconfig1_t is just a structure that contains the control information pertaining to the SPI transfer. 

1) so... I if understand correctly, I could place if(gioHighLevelInterrupt()==1), then start receiving the data?

2) The question is not precisely about the ADS. Is more on how can I make that the SPI gets two packages of 12 bits each and then place them into a bus of 24 bits

3) ok ok... that structure is defined from halcogen? of is defined by me?

thanks!!

Hi Charles

I hope you are doing great. I was checking the codes generated by halcogen and some post and was wondering on something...

If I have an interrupt from the ADS on GIOB[2] pin, I could then use the polling method, which is more complete than the other (In terms of information)

so watching a post, I made this:

while((spi->FLG & 0x00000100U) != 0x00000100U)

       {

       } /* Wait */

       /*SAFETYMCUSW 45 D MR:21.1 <APPROVED> "Valid non NULL input parameters are only allowed in this driver" */

       *destbuff = (uint16)spi->BUF;

       data1=spi->BUF;

       data2=spi->BUF;

       data3=spi->BUF;

       data4=data1<<16U|data2<<8U|data3;

       //llenar arreglo 1

       /*SAFETYMCUSW 567 S MR:17.1,17.4 <APPROVED> "Pointer increment needed" */

       destbuff++;

       blocksize--;

I did this so the buffer empty the information on the data1, then the second word on data 2 and the third on data 3....

I havent been able to test it but was wondering if ir would work...

Also, I was thinking on calling the "spiReceiveData" function (polling one) from the

if (offset >= 8U)
		{
			gioNotification(gioPORTB, offset - 8U);
                        spiReceiveData(............);

		}
does it make any sense??
and last question: what is the difference from polling method and interrupt method?? on this module


thanks!!!

Im trying to receive 8 bits, transfer them to a variable and receive the other 8 bits and so on and then concatenate them on data4

I cannot use that function. The SIMO pin is not connected.

Charles Tsai said:

Perhaps you can configure the SPI for 12-bit mode and receive two 12-bit data. The CPU can concatenate them after two 12-bit data are received.

how could I accomplish that???

Charles Tsai said:

In any case, you need to use the spiTransmitAndReceiveData() for this, not simply reading spi->BUF multiple times.

ok ok. but I need to use spiGetData or spiReceiveData

best regards

Mmmmm okok

Ok. If i get ir right,  could i just use like

(pin interrupt)

Spigetdata(...)

Spigetdata2(....)??? Something like that?

I already checked with the ADS forum and they told me that as long as the full trasfer occurs on less time than the conversion time, I should not have any problem. 

So I can do 2 12bits transfers. 

ammmm How could I pass 2 for the block size??

spiTransmitAndReceiveData(spiREG1, &dataconfig1_t, 24, TX_Data_Master, RX_Data_Master); ?

and havingRX_Data_Master be uint16 RX_Data_Master[24] = { 0 }; ??

thanks!!

Hi Charles

Sorry for the late response

So... after checking what you said, is this:

unint32 RX_Data_Master[2]={0};

if(pin_interrupt)

spiTransmitAndReceiveData(spiREG1, &dataconfig1_t, 2, TX_Data_Master, RX_Data_Master);

having a charlen of 12. 

Just to clarify something... the charlen is the size of the package to be received right?? so if Im receiving 24 bits, then is 3 bytes right??

I think I might get confused with the example because there they have the blocksize on 16 and the destbuff is an arrangement of 16...

so I guess I was thinking the code was talking on bits and not bytes or packages

Am I right??

thanks!!

I checked the variable, the spiDAT1 and this is what the debugger showed me...

souldnt I see some numbers on it?

Hi Charles

Somehow the clock started to work. But.... ammm Im not sure I can call it a clock...

shouldnt it be a perfectly square signal?? why it looks like a sawtooth???

This is what I have. Each frame is 12 bits. 

Hi Charles

I was reading something on the data sheet and found this:

does this means that when Im using the debugger (XDS100v2) Im not reaching the external interrupt?

thanks

Hi Charles

The thing is that I used a break point on gio notification and went there everythime when usin gioa pin for a test... so this confuse me a little. Why was I entering to gio notification and to gio low level interrupt??