I designed a product using the C8051F380 several years ago, for a client. The client recently built a new production run, after a long hiatus, and they can't seem to connect to the product in order to program the MCU, using the legacy IDE (freshly downloaded from the Silabs website) and a newly purchased debug adaptor from DigiKey. The IDE shows the connection to the debug adaptor, as follows:

When they attempt to connect, they get the following error:

On the possibility that the fault lay with the product under test, they attempted to connect to an earlier and fully functional production run version that had already been programmed, two years ago... and got the same results.

They also attempted to connect to a genuine SiLabs C8051F380 development board... with the same results.

They are using a version of the IDE just downloaded from the Silabs website a few days ago. They purchased the debug adaptor from Digikey, using the following:

https://www.digikey.com/product-detail/en/silicon-labs/DEBUGADPTR1-USB/336-1182-ND/807653

I have a great deal of experience using the C8051xxx series of products, and have never run into this problem.

Any ideas?

Thanks in advance, 

Norm Bernstein

 

Hello guys!
In the Simplicity Studio's example UART INTERRUPT code there is an interrupt routin.
I understand that if the chip gets a message on its UART then i get an interrupt, then the SCON0_RI register goes to 1 and i can read the data from the uart.
Okay but how or when the SCON0_TI register goes to 1?

There is no other place in the example where they do SCON0_TI = 1;
So how can i send a message to the uart buffer for transfare?

 
In the example program they say this:

SI_INTERRUPT(UART0_ISR, UART0_IRQn)   // Okay we get an interrupt
{
   if (SCON0_RI == 1)                                     // Okay the register bit goes to 1 because we received a message
   {
      if( UART_Buffer_Size == 0)  {      // If new word is entered
         UART_Input_First = 0;    }

      SCON0_RI = 0;                           // Clear interrupt flag

      Byte = SBUF0;                      // Read a character from UART

      if (UART_Buffer_Size < UART_BUFFERSIZE)
      {
         UART_Buffer[UART_Input_First] = Byte; // Store in array

         UART_Buffer_Size++;             // Update array's size

         UART_Input_First++;             // Update counter
      }
   }

   if (SCON0_TI == 1)                   // Check if transmit flag is set  How is the transmit flag set??
   {
      SCON0_TI = 0;                           // Clear interrupt flag

      if (UART_Buffer_Size != 1)         // If buffer not empty
      {
         // If a new word is being output
         if ( UART_Buffer_Size == UART_Input_First ) {
              UART_Output_First = 0;  }

         // Store a character in the variable byte
         Byte = UART_Buffer[UART_Output_First];

         if ((Byte >= 0x61) && (Byte <= 0x7A)) { // If upper case letter
            Byte -= 32; }

         SBUF0 = Byte;                   // Transmit to Hyperterminal

         UART_Output_First++;            // Update counter

         UART_Buffer_Size--;             // Decrease array size

      }
      else
      {
         UART_Buffer_Size = 0;            // Set the array size to 0
         TX_Ready = 1;                    // Indicate transmission complete
      }
   }
}

Hi,

    I need an information on bus timings, I.E. the exact output timing of a 2-cycle assembler instruction INC P0. Like, when does it really do the increment? End of second cycle or beginning of third? Of course, I need an exact information so the vague "beginning of n-th cycle" is not enough. The same goes for MOVX instruction to/from external RAM. Is there a document describing this? I found in RM muxed/nonmuxed reads/writes, but not compared to actual clock (only to read/write signals).

Regards,

    Sinisa.

Hello,

When I connected a USB debug adapter to target and PC, I received an error message as below:

I used the version of Simplicity Studio is SV4.1.11.7. I paste it below:

The 8 bits MCU i used is C8051F563-A_IM. Can you let me know how to solve it?

Thanks,

Hao

Hello,

If I set SPI0 as a master and 15 sensors SPI as slaves to a daisy chain SPI mode:

1. Does C8051F57x support a daisy chain method for SPI?
2. if so, how can I set up the registers of SPI0CFG and SPI0CN. Also can I still use the equation to calculate the SPI0 Clock Rate for SPI0CKR as on page 255 in reference manual?
3. How can I read the data from the data register, SPI0DAT? If every slave sends 16 bit data, the 3 slaves will send total 48 bit data. 

Does Silicon Lab have any document and example about daisy chain SPI design?

Thanks,

Hao

Question: when setting up the Busy Bee part for debug; can the internal LF oscillator (80Khz) clock be used during debugging?

When I tried this the part acted like it got bricked.  Could not use the Dev Kit to reprogram known good code in it.  Had to use a production programmer to go back to a rev of code that had the HF oscillator (24.5MHz).  Now I can run the debugger.

This will be a burn and learn process if I can't use the debugger with the LF oscillator setup.

 

hi..,

i am using C8051F340DK and i want to communicate with PC by USB interface. Plz. let me know how can i do this?

In the EFM8BB2 reference manual it says:

CMP0 may also be used as a reset source or as a trigger to kill a PCA output channel.

In the manual it does not explain further and I cannot find any examples for this or anything else in the forum. Could someone please give a more detailed description of this feature and how to implement this.

Thanks in advance.

Hi. I have EFM8BB1 Busy Bee Starter Kit Board (BRD5200A Rev A01) in OUT mode and my own PCB with EFM8BB10F2G mcu, which is connected through C2 interface (C2CK, C2D, 3V3, GND).

When i set a breakpoint, the program stops and messages "?C_STARTUP: LJMP STARTUP1" and "Fail to read memory..." appear in disassembly window. But in case of using empty while(1) loop the breakpoint works. In case of not using breakpoints, the program correctly stops and starts with pause/stop buttons.

Watchdog is disabled.

Please, help me to solve this problem.

 

I want to change bank in interrupt and I write this:
 

INTERRUPT_USING(TIMER0_ISR, TIMER0_IRQn, 2){
//      some code
}

but when I go into this interrupt my bank always 0. When I write bank1 instead of 2 the bank is switched. Why my bank cannot switch higher than 1? 

Thanks for yours answer!

I'm using STK Board.

 

Slave Device doesn't have pulled-up register.

 

so I use pulled-up register 4.7k.

 

However, the example source (SMBus_Master) fails to initialize the SDA line.

 

Repeated While loop...

while(!SDA)    {       XBR2 = XBR2_XBARE__ENABLED;      // Enable Crossbar       SCL = 0;                         // Drive the clock low       for(i = 0; i < 255; i++);        // Hold the clock low       SCL = 1;                         // Release the clock       while(!SCL);                     // Wait for open-drain                                        // clock output to rise       for(i = 0; i < 10; i++);         // Hold the clock high       XBR2 = XBR2_XBARE__DISABLED;     // Disable Crossbar    }

 

Is this due to pulled-up Register?

 

thank you.

I want to output timer to port pins. Is this possible? I couldn't find anything similar in the reference manual.

Hello guys!
Is there somebody who would check my MODBUS RTU implementation?

The story is that i want to use the EFM8UB2 8bit microcontroller for a MODBUS RTU slave device, for some kind of a I/O expander.
For this iam using the basic UART example provided in the Simplicity Studio.

I can't try my code yet, but i feel like i let a bunch of things out of the code for now.

The device is going to be a slave modbus rtu device, and the master has to reach its i/o ports to be able to read and toggle it trought modbus protocoll.
Thats all i want to implement.

The EFM8UB2 datasheet is here:
https://www.silabs.com/documents/public/data-sheets/efm8ub2-datasheet.pdf

And my code so far:
https://gist.github.com/zekageri/e54f8837cbb5fe887672ba0d79503e39

The basic idea is that if an interrupt occours on the UART i assume that there are messages from the master.
After that i start a timer for 2msec. Every time new data comes i reset the timer, if no new data comes in 2msec the timer interrupt fires and i assume that the data flow is over. In the Interrupt routin of the timer, i get all the data in separate variables. Address, Func code , Data and CrC.
If the address is for that chip i calculate a crc. if it is okay i begin to look into the function code for instructions from the master. Based on the code i do what instructions in the data.
If the function code is the predeclared _READ_SINGLE_REGISTER     0x04 then i assume that the masters wants the register statuses. I get it and create the response message in this case the register statuses.
If the function code contains the predeclared _SET_SINGLE_REGISTER     0x06 then i assume that the master wants the chip to toggle the pins based on the data passed data bits. After i set the bits in the correct order i create an echo message to the master in this case.
 

Thats all for now.

Thanks for your time.