Hello,

My code is as below:

SBIT (CS0, SFR_P2, 0);                 // CS0 == 1 means OFF
SBIT (CS1, SFR_P2, 1);                 // CS1 == 1 means OFF
SBIT (CS2, SFR_P2, 2);                 // CS2 == 1 means OFF
SBIT (CS3, SFR_P2, 3);                 // CS3 == 1 means OFF
SBIT (CS4, SFR_P2, 4);                 // CS4 == 1 means OFF

//-----------------------------------------------------------------------------
// Global Variables
//-----------------------------------------------------------------------------

U8 Find_start_error = 0;

When I build it, the error message shows as below:

*** ERROR C141 IN LINE 19 OF C:\main.c: syntax error near '0xA0'
*** ERROR C141 IN LINE 20 OF C:\main.c: syntax error near '0xA0'
*** ERROR C141 IN LINE 21 OF C:\main.c: syntax error near '0xA0'
*** ERROR C141 IN LINE 22 OF C:\main.c: syntax error near '0xA0'
*** ERROR C141 IN LINE 23 OF C:\main.c: syntax error near '0xA0'
*** ERROR C129 IN LINE 29 OF C:\main.c: missing ';' before 'Find_start_error'

Can you let me know why the error messages happen? Thanks.

Hao

Hi

I am trying to interface Uart1 in c8051f020. I am able to transmit data but not able to receive data. My configuration is as follows:

void PORT_Init (void)
{
   XBR0     = 0x06;
   //XBR1     = 0x00;
   XBR2     = 0x44;                    // Enable crossbar and weak pull-up
                                       // Enable UART1

   P0MDOUT = 0x40;                    // Set TX pin to push-pull
}

void UART1_Init (void)
{
   SCON1   = 0x50;                     // SCON1: mode 1, 8-bit UART, enable RX

   TMOD   &= ~0xF0;
   TMOD   |=  0x20;                    // TMOD: timer 1, mode 2, 8-bit reload


   if ( (((SYSTEMCLOCK/BAUDRATE)/256)/16) < 1 )
   {
      PCON |= 0x10;                    // SMOD1 (PCON.4) = 1 --> UART1 baudrate
                                       // divide-by-two disabled
      CKCON |= 0x10;                   // Timer1 uses the SYSTEMCLOCK
      TH1 = - ((SYSTEMCLOCK/BAUDRATE)/16);
   }
   else if ( (((SYSTEMCLOCK/BAUDRATE)/256)/32) < 1 )
   {
      PCON &= ~0x10;                   // SMOD1 (PCON.4) = 0 --> UART1 baudrate
                                       // divide-by-two enabled
      CKCON |= 0x10;                   // Timer1 uses the SYSTEMCLOCK
      TH1 = - ((SYSTEMCLOCK/BAUDRATE)/32);
   }
   else if ( ((((SYSTEMCLOCK/BAUDRATE)/256)/16)/12) < 1 )
   {
      PCON |= 0x10;                    // SMOD1 (PCON.4) = 1 --> UART1 baudrate
                                       // divide-by-two disabled
      CKCON &= ~0x10;                  // Timer1 uses the SYSTEMCLOCK/12
      TH1 = - (((SYSTEMCLOCK/BAUDRATE)/16)/12);
   }
   else if ( ((((SYSTEMCLOCK/BAUDRATE)/256)/32)/12) < 1 )
   {
      PCON &= ~0x10;                   // SMOD1 (PCON.4) = 0 --> UART1 baudrate
                                       // divide-by-two enabled
      CKCON &= ~0x10;                  // Timer1 uses the SYSTEMCLOCK/12
      TH1 = - (((SYSTEMCLOCK/BAUDRATE)/32)/12);
   }

   TL1 = TH1;                          // init Timer1
   TR1 = 1;                            // START Timer1
   TX_Ready = 1;                       // Flag showing that UART can transmit
   EIE2     = 0x40;                    // Enable UART1 interrupts

   EIP2    = 0x40;                     // Make UART high priority

}

I am using external crystal of 22.1184 MHz for system clock. 

Hello,

how to configure I2C by Polling Method in C8051F350

thanks

iosman

Hi, I am using PCA1 channel 6 for a 16 bit PWM output. This works fine, but I also need to control the port state when the PWM is not running. Before the PWM mode is invoked I can toggle the port directly from code. After the PWM sequence is complete I am unable to regain control of the port. I have tried turning off the PCA clock and tried a number of other methods but nothing seems to work . The closest I can get is to set the PWM count registers to 0000 yto leave the port in a safe state (output high). This usually works but I sometimes get odd behaviour like the PWM retriggeringor the port getting stuck low, which is a not good as it leaves a voice coil hard on. 

Here is the essential code that has partially worked:-

// Initialisation from Config Wizard 2
void PCA1_Init()
{
    SFRPAGE   = ACTIVE2_PAGE;
    PCA1CN    = 0x00;
    PCA1MD    = 0x82;
    PCA1CPM6  = 0xC2;
    PCA1CPL6  = 0x33;
    PCA1CPH6  = 0xB3;
    SFRPAGE   = ACTIVE_PAGE;
}

//Ful Power
SFRPAGE   = ACTIVE2_PAGE;	
PCA1CPL6  = 0xFF;
PCA1CPH6  = 0xFF;
CR1 = 1;
SFRPAGE   = ACTIVE_PAGE;
  .
  .
  .
  .
//drop to half power
SFRPAGE   = ACTIVE2_PAGE;			
PCA1CPL6  = 0x00;
PCA1CPH6  = 0x80;
SFRPAGE   = ACTIVE_PAGE;	
  .
  .
  .
  .

//Turn Off
SFRPAGE   = ACTIVE2_PAGE;		
PCA1CPL6  = 0x00;
PCA1CPH6  = 0x00;

fn_Delay(50);	(milliseconds)	

CR1=0;
SFRPAGE   = ACTIVE_PAGE;

Thanks all

I have been using ARM Keil PK51(V9.60a) as an eight-bit microprocessor development tool. 

Recently, C8051F389 was selected because two UART,is used for a certain requirement. But during the development process, Keil told me about, “Complete peripheral simulation is not available and is not planned to be implemented by ARM”... I also found that where there are two UART Silabs chips, Keil does not support the simulation of its peripherals.

Excuse me, 1) for these Silabs chips with two UART to simulate their peripherals, what appropriate development tools should be used? 2) if you use Keil for normal compilation, can you ensure the normal operation of the resulting Hex files?

Greetings

James Xing

Hi,

   I've recently bought Universal Bee starter kit and I'm looking for information that I can't seem to find in any guide/manual. In order to program the MCU I have to set clock dividers, I/O pin direction, up or down input pin trigger, pull-up/pull-down resistor control and so on. How do I do that? I have some Atmel 8051 experience which  have this solved by setting internal memory addresses or by using fuses. I don't see that information in any document whatsoever.

I made custom PCBs for my efm8-project, but I can't seem to program the chips on them. I checked lots of things already:

• the orientation of the chip,  I soldered it on the right way
• the voltage on Vdd (measured at the chip), it was ~3.3
• if the GND of the chip is connected to the programmer and supply GND, it is
• if the RSTb was pulled low by the programmer, it is
• if the C2D line is changing when I click 'debug' (the voltage seems to change, but hard to check without a storage scope).
• if the part I'm using is the part in my schematic, and if the pinout in the datasheet is the pinout in my schematic and the pinout on the board as well. This was all correct as well.

The programmer works fine, tested it yesterday with an EFM8 on breadboard. For the breadboard as here I'm using pins 2,4,7 and not the pinsharing pins. There is a 100nF decoupling right on Vdd/Gnd, and the 1K Ohm pull-up resistor on reset.

Now I'm suspecting a chip that's somehow dead. I'm working very ESD safe so I don't think this is the case actually. But I checked for power usage, and measuring 0.00 mA using my multimeter for the whole PCB.

So my question is, how much power should a fresh EFM8 draw out of the box? I suspect it should be the 'idle' current on the internal 20 Mhz oscillator, so 1.4 mA.

And what should be my debugging approach here?

I am working on EFM8BB3 A02 controller development board. I am checked two different code using serial interrupt. For that in hardware configuration using simplicity studio i did following configuration.

and for using 9600 baudrate i did following configuration.

for both code this configuration was same but when i switch one program to another program for testing it serial do not work. 

Again when i reduce SYSCLK from 12 MHz to 3 MHz by Clock source divider it works. 

I am not getting that how this has been worked?

Do my code can have any impact in this configuration?

or Do i have to see another configuration also for UART0 frequency  setting.

I also pulled down P2.2 pin for enabling UART0.

and in my one code i used P0.2 & P0.3 as external interrupt. For UART0 i used P0.4 & P0.5 in both code.

I use the usb debug adapter and silicon lab flash utilities to flash C8051F126. After successfully program  we removed the IC from the board  and read the checksum using our offline programmer (HILO Programmer). It is different from the original firmware, why is it so ? Is there any setting need to be done, please advise ?

Hi,

I can not program my LCD Base Board with C8051F930 MCU. Is it permanently damaged? Or there is a solution to reprogram the MCU? I have tried all the possibilities I knew.

Please advise.

Thanks.

Hi together,

I got my DK yesterday. But now I'm a little bit confused about the slef-powered configuration.

Manual says J8 has to be VBUS-VREGIN. Ok.

Then it says RS232 at P4 can not be used cause it will not get powered. But when the f380 is powered over VBUS, VDD is an 3V3 output and this is connected via J7 to the +3VD net and to U3 for RS232.

Has J7 to be open?

Greetings

Markus

Hi everybody!

What happen when I hold the reset line in low state for a long period of time? I search in forum and datasheets, but I cant find. The main question is, how much energy consume when device in this state?

Thanks for your answer.

Regards, 

Richard