Legacy microcontrollers Forum Discussions

Variables defined with const volatile type qualifier are linked to the DCONST section in ROM area.

During start-up initialization these variables are copied into INIT section in RAM area from where the SW reads their values.

My intention is to avoid coping the variables into INIT section in order to reduce the RAM memory usage.

How can I make the SW to read variables directly from DCONST section and avoid allocation into RAM memory?

When my new MCU debugged for the first time，the IAR8.4 prompted me that

Who can help me explain why and how to deal with this problem?

hello, the softune workbench it can´t debug the software and sends this message " FR family softune workbench has stopped working" Help please

Hello ,

I am modifying the ethernet example , but doesn't work .

perhaps there is a working example .

while (1)

    {

        if ( 0 != EmacGetFrameLength(&EMAC0) )  // Emac received data?

        {

            LwIPInputHandle();    // Lwip handle the received data

        }

        LwipPeriodHandle();       // Lwip clears ARP table every 5 second

    if ( 0 != EmacGetFrameLength(&EMAC0) )  // Emac received data?

        {

    err = udp_bind(upcb, IP_ADDR_ANY, UDP_SERVER_PORT);

        IP4_ADDR(&ip6,192,168,7,11);

       pb = pbuf_alloc(PBUF_TRANSPORT, 512, PBUF_REF);

        pb->payload = str;

        pb->len = pb->tot_len = 512;

        udp_connect(upcb, &ip6,5000);

        udp_send(upcb,  pb );

        udp_disconnect(upcb);

        pbuf_free( pb);

    }

    }

I would appreciate any comment.

I have several questions related to programming the nonvolatile Flash memory on Cypress S6J32GEKSNEE2000

1) What is the expected/max current draw on the device? Datasheet 002-10689 Rev *J states that VCC12 draw 1250 mA during operation, but could that be less when just programming the device?

2) I have found instructions for Serial Programming in Chapter 14 of S6J3200 Series Hardware Manual Doc. No. 002-04852 Rev. *F. Is this the only method of programming the NVM, and if so is there an example bootloader project for this device?

2a) What frequency crystal should be connected between X0 and X1?

3) Is there an evaluation board for this product?