Software Forum Discussions

Hello,

today I tried a simple example to read a pin into status register and failed at build time.

*** ERROR L127: UNRESOLVED EXTERNAL SYMBOL

    SYMBOL:  Status_Read

    MODULE:  .\DP8051\DP8051_Keil_951\Debug\main.obj (MAIN)

*** ERROR L128: REFERENCE MADE TO UNRESOLVED EXTERNAL

    SYMBOL:  Status_Read

    MODULE:  .\DP8051\DP8051_Keil_951\Debug\main.obj (MAIN)

    ADDRESS: 100075DH

Program Size: data=14.0 xdata=96 const=40 code=1950

The command 'LX51.exe' failed with exit code '2'.

Well, the Fitter tells

ADD: mpr.M0037: information: Unused pieces of the design have been optimized out. See the Tech mapping section of the report file for details.

where the report file doesn't give any new/more informations to me. In deed, the generated Status.c contains

#if !defined(Status_sts_sts_reg__REMOVED) /* Check for removal by optimization */

...

uint8 Status_Read(void)

{

    return Status_Status;

}

...

where cyfitter.h holds:

/* Status */

#define Status_sts_sts_reg__REMOVED 1u

All this explains the problem faced me but doesn't solve it since is problem is related to code generation stage ...  A documentation search also doesn't brought more clearity.

So, where is a check mark and documentation about those optimization? Optmization on hardware level is a good thing (obvioulsy happened here) but the software is forgotten - how to fix it?

Thanks!

Hi,

I'm trying to configure one of the ACLK pins to provide a clock to an external device. I've tried adding the following lines but it does not appear to have any affect:

            wiced_hal_gpio_configure_pin(WICED_P36, GPIO_OUTPUT_ENABLE, 0);

            wiced_hal_aclk_enable(24000000, ACLK0, ACLK_FREQ_24_MHZ);

I could not find anything that explicitly tells the GPIO driver what function I want on the pin, how does it know I want ACLK0 on P36 (rather than P32).

Similar to this question but a different device: CYW20735 ACLK on pin

Thanks

Nigel

I'm using CYW43907 eval kit with WICED SDK 6.2.1. I am porting a C based networking application to WICED SDK (FreeRTOS + LWIP) and it uses TCP client-server model for inter-thread communication. My issue is, the "wiced_tcp_connect" API always returns error and communication is not established between the threads. The same threads are able to connect to remote server/client respectively but not to each other. Is there any limitation in WICED SDK (FreeRTOS + LWIP) that does not allow socket connections between threads of same application?

Hi,

If the customer would like to connect external memory as instruction ROM with CYW43907,

Q1: which interface can the customer use? e,g SPI or other?

Q2: how much is the maximum memory size to expand memory size of ROM by external memory.

Thank you.

--TAK