PSoC6S4 Vector table of the cm0+ in flash.

Digimorf — Tue, 09 May 2023 17:53:56 GMT

Has anyone tried to leave the vector table of the cm0+ in flash and configure an interrupt?

By default it is copied into SRAM. No doubt about it's faster to fetch the addresses of the IRQ handlers at runtime, but I need to check if the access to SRAM by both cores causes jitter in fetching the IRQ handlers.

I tried to customize the startup file of the cm0+, but something must be inherited by the PDL such as the ram_table_address.

Thanks

CY8C62 DMA from buffer to GPIO P10_0..2

Digimorf — Wed, 15 Mar 2023 23:51:41 GMT

Hello,

I am working on the configuration of a DMAC channel for streaming data bytes from a buffer to the GPIO port 10, using only GPIOs from 0 to 2. I think I am missing something but I really can't make it work.

Since I am learning for now I am triggering the DMA by simply enabling the block, next I will trigger it with a CC0 of a counter. But, let's see what I got so far.

I have started an "Empty Project" from the getting started section. Then in the "Device Configurator" I simply set the DMAC channel 0 for a transfer of 1 byte.

/* NOTE: This is a preview only. It combines elements of the
 * cycfg_dmas.c and cycfg_dmas.h files located in the folder
 * C:/Users/Francesco/mtw/Empty_App_1/bsps/TARGET_APP_CY8CKIT-062S4/config/GeneratedSource.
 */

#include "cy_dmac.h"
#if defined (CY_USING_HAL)
    #include "cyhal_hwmgr.h"
#endif //defined (CY_USING_HAL)

#define cpuss_0_dmac_0_chan_0_HW DMAC
#define cpuss_0_dmac_0_chan_0_CHANNEL 0U
#define cpuss_0_dmac_0_chan_0_IRQ cpuss_interrupts_dmac_0_IRQn

cy_stc_dmac_descriptor_config_t cpuss_0_dmac_0_chan_0_Descriptor_0_config = 
{
    .retrigger = CY_DMAC_RETRIG_IM,
    .interruptType = CY_DMAC_1ELEMENT,
    .triggerOutType = CY_DMAC_1ELEMENT,
    .channelState = CY_DMAC_CHANNEL_ENABLED,
    .triggerInType = CY_DMAC_1ELEMENT,
    .dataPrefetch = false,
    .dataSize = CY_DMAC_WORD,
    .srcTransferSize = CY_DMAC_TRANSFER_SIZE_WORD,
    .dstTransferSize = CY_DMAC_TRANSFER_SIZE_WORD,
    .descriptorType = CY_DMAC_SINGLE_TRANSFER,
    .srcAddress = NULL,
    .dstAddress = NULL,
    .srcXincrement = 0,
    .dstXincrement = 0,
    .xCount = 1,
    .srcYincrement = 1,
    .dstYincrement = 1,
    .yCount = 1,
    .nextDescriptor = NULL,
};
cy_stc_dmac_descriptor_t cpuss_0_dmac_0_chan_0_Descriptor_0 = 
{
    .ctl = 0UL,
    .src = 0UL,
    .dst = 0UL,
    .xSize = 0UL,
    .xIncr = 0UL,
    .ySize = 0UL,
    .yIncr = 0UL,
    .nextPtr = 0UL,
};
cy_stc_dmac_channel_config_t cpuss_0_dmac_0_chan_0_channelConfig = 
{
    .descriptor = &cpuss_0_dmac_0_chan_0_Descriptor_0,
    .priority = 3,
    .enable = false,
    .bufferable = false,
};
#if defined (CY_USING_HAL)
    const cyhal_resource_inst_t cpuss_0_dmac_0_chan_0_obj = 
    {
        .type = CYHAL_RSC_DMA,
        .block_num = 2U,
        .channel_num = cpuss_0_dmac_0_chan_0_CHANNEL,
    };
#endif //defined (CY_USING_HAL)


void reserve_cycfg_dmas(void)
{
#if defined (CY_USING_HAL)
    cyhal_hwmgr_reserve(&cpuss_0_dmac_0_chan_0_obj);
#endif //defined (CY_USING_HAL)
}

The three GPIOs P10_0..2 are configured as:

const cy_stc_gpio_pin_config_t CYBSP_A0_config = 
{
    .outVal = 0,
    .driveMode = CY_GPIO_DM_STRONG_IN_OFF,
    .hsiom = CYBSP_A0_HSIOM,
    .intEdge = CY_GPIO_INTR_DISABLE,
    .intMask = 0UL,
    .vtrip = CY_GPIO_VTRIP_CMOS,
    .slewRate = CY_GPIO_SLEW_FAST,
    .driveSel = CY_GPIO_DRIVE_1_2,
    .vregEn = 0UL,
    .ibufMode = 0UL,
    .vtripSel = 0UL,
    .vrefSel = 0UL,
    .vohSel = 0UL,
};

Then in the main.c I set the destination and source:

#include "cyhal.h"
#include "cybsp.h"

#define scanline_dma_HW             cpuss_0_dmac_0_chan_0_HW
#define scanline_dma_descriptor     cpuss_0_dmac_0_chan_0_Descriptor_0
#define scanline_dma_descriptor_cfg cpuss_0_dmac_0_chan_0_Descriptor_0_config
#define scanline_dma_CH             cpuss_0_dmac_0_chan_0_CHANNEL
#define scanline_dma_CH_cfg         cpuss_0_dmac_0_chan_0_channelConfig

uint32_t pix = 0x5;
GPIO_PRT_Type* scanline_rgb_port = GPIO_PRT10;


int main(void)
{
    cy_rslt_t result;

#if defined (CY_DEVICE_SECURE)
    cyhal_wdt_t wdt_obj;

    /* Clear watchdog timer so that it doesn't trigger a reset */
    result = cyhal_wdt_init(&wdt_obj, cyhal_wdt_get_max_timeout_ms());
    CY_ASSERT(CY_RSLT_SUCCESS == result);
    cyhal_wdt_free(&wdt_obj);
#endif

    /* Initialize the device and board peripherals */
    result = cybsp_init();

    /* Board init failed. Stop program execution */
    if (result != CY_RSLT_SUCCESS)
    {
        CY_ASSERT(0);
    }

    /* Enable global interrupts */
    __enable_irq();

    Cy_DMAC_Descriptor_Init(&scanline_dma_descriptor,
                            &scanline_dma_descriptor_cfg);

    Cy_DMAC_Descriptor_SetSrcAddress(&scanline_dma_descriptor,
                                     (void*)&pix);

    Cy_DMAC_Descriptor_SetDstAddress(&scanline_dma_descriptor,
                                     (void*)(scanline_rgb_port->OUT));

    Cy_DMAC_Channel_Init(scanline_dma_HW,
                         scanline_dma_CH,
                         &scanline_dma_CH_cfg);

    Cy_DMAC_Channel_SetDescriptor(scanline_dma_HW,
                                  scanline_dma_CH,
                                  &scanline_dma_descriptor);

    Cy_DMAC_Channel_Enable(scanline_dma_HW,
                          scanline_dma_CH);

    Cy_DMAC_Enable(scanline_dma_HW);

    for (;;)
    {

    }
}

My Logic Analyzer should show signals 0 and 2 pulsing from low to high but nothing happens, I can't understand if the transfer doesn't start, or if the GPIO port is not correct for output.

I haven't been lucky in finding an example of the use of DMA on GPIOs, so I am asking here 🙂

Thank you.

how to include 'cy_retarget_io.h' into our project?

Sudeep AJ — Mon, 13 Mar 2023 20:09:07 GMT

So currently I am experimenting with HAL UART APIs and I learnt that there is cy_tetarget_io which helps us to use printf function with UART. I used it with the example project provided and it worked perfectly. But when I tried to include it in my Empty Project I am getting an fatal error. Can anyone please help me with this issue?

Is anyone using PSoC creator to build projects?

Sudeep AJ — Sat, 11 Mar 2023 09:51:43 GMT

If it can be used could anyone please tell me which Device to select in the PSoC creator?

This is the first time exposure for me to work with something like this and I am taking time to learn and get comfortable using the IDEs before jumping into my project. I tried running example codes with Modus Toolbox but I feel I need to understand the code, but I am not able to find any documents explaining the code completely, if anyone could help me with this I would appreciate that.

PSoC creator

Digimorf — Mon, 06 Mar 2023 23:57:00 GMT

Is it possible to use PSoC creator to create an application for the CY8CKIT-062S4? I didn't see this kit in the supported ones

How's the challenge going for you?

cstanton — Fri, 24 Feb 2023 12:46:03 GMT

Any unexpected hiccups so far? Deviating from your plans? Life getting in the way?

Or is it all working out just fine?