Hello,

 

I want to use SmaRTClock Oscillator with a Crystal in my project but the values get to incorrect registers.

In the first picture, I am trying to set XMODE and BIASX2 to 1 in RTC0XCN register how it was said in documentation, when I start my program in debug I can notice that first instruction was successfully written to the correct register.

 

In the second picture, I need to set the desired loading capacitance in RTC0XCF register. But before I got to the RTC_Write function in oder to write it the previous register has been changed.

 

And when I get to condition Poll the SmaRTClock Clock Valid Bit (CLKVLD) until the crystal oscillator stabilizes my program sometimes stack there.

Why it happanes and how can I fix it? Thanks in advace.

I noticed that the webpage for the C8051F911 says that it's not recommended for new designs. What would be an equivalent/improved part that is recommended for new designs? I think the specs that are difficult to match is the fact that it can operate down to 0.9V and has a 10 nA sleep mode with memory retention.

I need to interface MCP3551 ADC (SPI compatible- 3 wire interface) with C8051f410 microcontroller. The connections are shown as below.

-----------------                     -----------------
C8051F410   |                |       ADC MCP3551
               P0.7|-------------|~CS
                       |                |
               P0.1|-------------|SDO/~RDY
                       |                |
               P0.0|-------------|SCK
                       |                |
  Master         |               |     Slave
------------------                 -----------------

The Controller is SPI Master here and ADC is SPI Slave.

The required condition for SPI communication is SDO/~RDY pin should go low after ~CS pin is low. The ADC shows that situation. 

But after that how to start the data reception from the ADC?
How to tell the Controller that you should start clock pulses on SCK signal?
 

Once the communication starts there will be data in SPI0DAT register. But for that we need to start the clock pulses on SCK line.

Hi,

My SiLab Controller is C8051F5410.

I need to read ADC data from 22 bit MCP3551 ADC.

The connections are shown in the image attached.

I got the SDO pin low as ADC Conversion complete; after that I need to read the ADC data using SPI0. 

How to initiate the SPI read operation from the ADC ? Here is the SPI0 initialization code :

  SPI0CFG   = 0x70;                   // Enable the SPI as a Master CKPHA = '1', CKPOL = '1'
   SPI0CN    = 0x03;                   // 3-wire Single Master, SPI enabled
   SPI0CKR   = (SYSCLK/(2*SPI_CLOCK))-1;  // SPI clock frequency equation from the datasheet

   ESPI0 = 1;                          // Enable SPI interrupts

When importing a relatively huge library with many functions that have local variables inside the functions. All the variables count towards the project total ram space? Even if i never use most of the functions.. Is there a way to prevent this?

I get error that address space overflow

 

Si1082

 

 

I declare and initialize a global variable, but when placed as "data" it reads 00 00 00 00, and when placed as xdata it reads like 00 4A 01 01 which i assume is the variable address?

const uint8_t sensoraddress[4] = {0x77, 0x77, 0x77, 0x77};

What is happening? (Si1082)

I copied the directory from another project, and it was working perfect until i changed the filename of where main() resides...

I am dumbfounded

If I am using Simplicity Studio to download a project to a development board AND I do NOT want to debug the project can i use a regular USB cable from my pc to the dev board

Does xdata go out of scope and get released when function ends?

I'm having some memory limitations, currently at 112 bytes of data ram.

Is there any good ways to optimize ram usage?

IDE and Flash Utility tool allows to get memory to file in HEX or DEC format. Its not ASCII format.

How to covert extracted hex or dec code to Intel hex format. So that one can clone mcu.

Hello everyone!

 

I'm having trouble getting my EFM8's programmed using the EFM8 Starter Kit 

I followed the instruction in this howto:

• I have short cable length, maybe 5cm.
• I have a strong pull-up resistor on C2CK (1kOhm to VCC)
• I'm powering the mcu using the starter kits 3.3V rail and shorted that to VTARGET
• I shorted "Cable detect" on the starter kit to GND

I have a QFN32 clamshell holding the part to program, with an added 10uF capacitor across pin 3 (GND) and 6 (VDD). That's where the power cables from the starter kit are soldered to as well. Also pin 9 (C2CK) and 10 (C2D) are conncted to the corresponding pins on the start kit.

Unfortunately Simplicity Studio just won't detect the part in the clamshell (I tried different EFM8s to make sure they're not damaged). The MCU pulls 3.5mA, which is it's typical idle current at 24MHz and the voltage is stable.

 

I recorded the attached images with my scope when clicking refresh hardware. I don't know anything else I could do to get this working, so I would appreciate any help.

 

Thank You!

Hi. 

I try to test a snippet code to see how to call the inline Assembly in C. My code as below:

 

But seem the assembly inside #pragma asm did not work. The error I got: Description    Resource    Path    Location    Type
Symbol 'MOV' could not be resolved .  Could you guy explain for me what should I do. Thank you guys so much. 

Whenever i declare a variable inside loops or somewhere later in a function, i always get an error. The only way to declare it is to do so at the beginning of the function where it's used. Why is this? This should be allowed in C when doing desktop programs?

Chip is Si1082

Hello All,

Can someone share working UART0 bootloader example (AN778) for F580 device?  My custom hardware has also CAN bus interface, but it is second option for me.

Best Regards!