topic Re: PE Generate code SPI SM1_ReceiveBlock not work in Processor Expert Software

PE Generate code SPI SM1_ReceiveBlock not work

rabbitz — Thu, 18 Jun 2015 00:50:23 GMT

When master SPI read data from slave SPI, the master will generate SPI CLK/PCS Low, the slave will clock data out from Sout.

I use SM1_ReceiveBlock() to read data from slave, there is no SPI CLK out from master, and it doesn't go the the PE_ISR(SM1_Interrupt).

I check SM1_SendBlock(), it works. There is "SPI_PDD_EnableDmasInterrupts(SPI0_BASE_PTR, SPI_PDD_TX_FIFO_FILL_INT_DMA);" .

In function "SM1_ReceiveBlock()", should add "SPI_PDD_EnableDmasInterrupts(SPI0_BASE_PTR, SPI_PDD_RX_FIFO_DRAIN_INT_DMA); " ?

Also, what is the proper way to generate SPI CLK during read data from slave?

Regards

Sam

Re: PE Generate code SPI SM1_ReceiveBlock not work

Alice_Yang — Thu, 18 Jun 2015 01:54:49 GMT

Hello Sam,

After you add the component "SPIMster_LDD" , you can refer to the Typical Usage .

there have two demo , with interrupt and without , it show how to configure and use the SPI.

IF it still have not meet your demand, please tell me your chip .

Have a great day,
Alice

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Re: PE Generate code SPI SM1_ReceiveBlock not work

adriancano — Thu, 18 Jun 2015 01:59:07 GMT

Hi,

I am not sure if you are using interrupt service or not, anyway please check the attached document in the typical usage section to see how the SPI_Master component is used.

Basically you need to write the following:

SM1_ReceiveBlock(MySPIPtr, InpData, BLOCK_SIZE); /* Request data block reception this is used to tell the driver how many bytes will be received and where they will be stored*/
SM1_SendBlock(MySPIPtr, OutData, BLOCK_SIZE); /*To provide clock for slave, master sends anything that is as long as 
                                                   expected answer from slave. length(msgDummy) = length(msgSlave) Outdata can be 0x00 or 0xFF commonly */
 /* Master waits for data from slave */
  while (SM1_GetBlockReceivedStatus(masterDevData) == FALSE) ;

Hope this information can help you

Best Regards,
Adrian Sanchez Cano
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Re: PE Generate code SPI SM1_ReceiveBlock not work

rabbitz — Thu, 18 Jun 2015 02:15:52 GMT

Hi Adrian,

It still require to enable the SPI Rx interrupt,

Here is my code, it works now.

SPI_PDD_EnableDmasInterrupts(SPI0_BASE_PTR, SPI_PDD_RX_FIFO_DRAIN_INT_DMA); /* Enable RX interrupt */

SM1_ReceiveBlock(spiMasterDevData, &RxData[0], 2);

SM1_SendBlock(spiMasterDevData, &CMDData[0], 2);

Regards

Sam