PSoC™ 6 Forum Discussions

Because routines are dual-core, our engineers in the dual-core to single-core work, compile a lot of errors, short time cannot be resolved;

I'm trying to setup a SPI TX by DMA, but I'm unable to trigger my DMA transaction (see more details here: Unable to properly setup DMA channels for SPI operation ).

I have my SPI TX FIFO level set to 1, which means that it should trigger the DMA as soon as it's empty. However, my DMA never gets triggered. So I'm wondering if the DMA would trigger on a level change (from low to high), or if it's enought that the condition is already true when I enable the DMA channel.

Hi,

I need to setup my DMA transfers, but I'm not used to the X loops/Y loops nomenclature of the PSoC 6.

What I want is:

One SPI_TX_BUF_EMPTY interrupt to trigger one byte transfer by the TX DMA channel, for up to 512 bytes, then deactivate the channel.

One SPI_RX_BUF_NOT_EMPTY interrupt to trigger one byte transfer by the RX DMA channel, for up to 512 bytes, then deactivate the channel.

For this, I have setup:

SPI RX FIFO level = 0, rx output connected to RX_DMA input trigger

SPI TX FIFO level = 1, tx output connected to TX_DMA input trigger

DMA_RX

Trigger input type: One transfer per trigger

Trigger deactivation and triggering: Retrigger immediately (pulse trigger)

Data element size: Byte

Src and Dest width: byte to byte

X loop size = 1          // will be changed dynamically

X loop src inc = 0

X loop dst inc = 1

Y loop size = 1

Y loop src inc = 0

Y lop dst inc = 0

DMA_TX

Trigger input type: One transfer per trigger

Trigger deactivation and triggering: Retrigger immediately (pulse trigger)

Data element size: Byte

Src and Dest width: byte to byte

X loop size = 1          // will be changed dynamically

X loop src inc = 1      // will be changed dynamically

X loop dst inc = 0

Y loop size = 1

Y loop src inc = 0

Y lop dst inc = 0

I need to have a variable transaction size, thus I have the two following functions:

int8_t SpiDma_Write(uint8_t *buf, uint16_t len) {

    if (len == 0) {

        return -1;

    }

    NVIC_EnableIRQ(SPI_TX_DMA_isr_cfg.intrSrc);

    SPI_TX_DMA_SetXloopDataCount(&SPI_TX_DMA_Descriptor, len);

    SPI_TX_DMA_SetXloopSrcIncrement(&SPI_TX_DMA_Descriptor, 1);

    SPI_TX_DMA_Start((const void *) buf, (const void *) SPI_HW->TX_FIFO_WR);

    return 0;

}

int8_t SpiDma_Read(uint8_t *buf, uint16_t len) {

    if (len == 0) {

        return -1;

    }

    NVIC_EnableIRQ(SPI_RX_DMA_isr_cfg.intrSrc);

    SPI_TX_DMA_SetXloopDataCount(&SPI_TX_DMA_Descriptor, len);

    SPI_RX_DMA_SetXloopDataCount(&SPI_RX_DMA_Descriptor, len);

    SPI_TX_DMA_SetXloopSrcIncrement(&SPI_TX_DMA_Descriptor, 0);

    SPI_RX_DMA_Start((const void *) SPI_HW->RX_FIFO_RD, (const void *) buf);

    SPI_TX_DMA_Start((const void *) &_spiReadToken, (const void *) SPI_HW->TX_FIFO_WR);

    return 0;

}

Conceptually, this makes sense to me. I change the X loop length, then start the transaction. For the read, I remove the increment of the tx, as I'm just sending a dummy variable. However, in Cy_DMA_Descriptor_SetXloopSrcIncrement(), I fail the assert:

CY_ASSERT_L1(CY_DMA_SINGLE_TRANSFER != Cy_DMA_Descriptor_GetDescriptorType(descriptor));

I have tried using the Y loop to trigger "len" X loops of 1, but then I fail another assert.

Also, it seems that the max transfer length is of 256 elements. How can I deal with transfers of 512 bytes?

Thank you,

Fred

Hi,

I need to start the SPI at 400 kHz, and then to 24 MHz. However, I can only go to 12MHz.

Clk_Peri = 96 MHz

Clk_Slow = 48 MHz

SPI_oversample = 4

Clock_SPI_divider = 60 // 400 kHz

In my code, I do some transactions at 400kHz, then I change the Clock_SPI_divider to 1, which should give me 24 MHz. However, I only measure 12MHz.

Is there a limitation that any peripheral can only go to Clk_Peri / 2? If so, is the advertised 25MHz only available when oversampling = 2, which is only available when MISO is not used?

Thanks,

Fred

Hello,

i’ve  bought some CY8CPROTO-062-4343W-dev boards.

At first I’ve tried to program them with the ModuleToolBox under Linux. This works fine for me.
But there I do not see the possibility to access both kernels. So I’ve tried the Psorc creator. When I am trying to programm the target the application gets very lagy. SO I tried the programmer manually. 
The Kit-Programmer 3 says that the programming fails with:

Program Finished at 16:37:37 |

| Programming Terminated

| Detected JTAG ID: "6B A0 24 77" is not in database

Program Requested at 16:36:52 |

Successfully Connected to KitProg3 (CMSIS-DAP/BULK/041A048B02237400) at 16:36:48              | KitProg3. CMSIS-DAP Version 2.0.0. Firmware Version 1.01.158. Hardware Id 11.

Opening Port at 16:36:48 |

I’ve already have updated the applications by using the psocCreator  4.2 (4.2.0.641)

About Kit-Programmer:
Installed CyInstaller Products:

Bridge Control Panel  1.20.0.4358

Clock Programmer  1.9.0.4358

Device Database  4358

Example Code  4358

PSoC Programmer  3.28.5.4358

USB Bootloader Application  4358

Thanks for helping

Sebastian

Forgive my gibberish with google translation

I use CY8C62xA IC，But I did not find the relevant demo，

I need a sdk2.0 dfu demo，The transmission mode is serial port.

Thanks

Both of these kits are dead. They will not take a new program and will not run the last program programmed into them.

The Programmer (3.28.5.4358) appears to connect with the device (KitProg).

I am using Creator 4.2.

Leds 2 and 4 are on solid.

Creator can not program the unit and appears to only see the KitProg.

I did program several programs into both devices with no problem and all seemed to work well.

I do not remember using any power other then the USB cable.

Since both devices are doing the same thing I guess I have done something but I don't know what at this point. I have been using PSoC Creator on other devices for years with no problem.

Since I am on Social Security there is no hope of getting either one of these devices again. But it would have been nice to know what I did.

I was going to just trash the devices but Sampath Selvaraj (Applications Engineer Senior Staff) said to post it to see if anybody had an idea as to what happened.

So, here it is...…….

Thanks for any comment

Lost In My Own World

I studied CE220924 to create a PSoC 6 MCU VDAC  sine wave generator using DMA. There is reference to an ECN 5947247 new code example at the end of the document. However, I'm unable to find that document or any code example in searches. Can anyone help?