1 Encountered problems
I wrote a set of BootLoader code myself, Implemented OTA (over-the-air upgrade) function. The problem encountered is that the jump is unsuccessful,
When BootLoader executed the jump function, nothing happened, and the APP.bin program did not start to execute as expected.

bootloader-code

2 Development environment
a. Embedded platform: si1060
b. development tools: silicon laboratories IDE , Vesion 5.50.00

3 Operating procedures Please see the figure 

a. There is a Windows tool on the PC to send the APP.bin file to nordic 52832 through the serial port.
b. nordic 52832 connects with SPI and SI4463.
c. Nordic 52832 sends the data to the SI1060's BootLoader via SI4463 after receiving the serial data.
d. The BootLoader on SI1060 writes the received APP.bin data to the flash space starting at 0x2800.
e. After all the data of APP.bin is written to flash, the BootLoader will implement a jump and try to jump to the address 0x2800 to start execution.

note:APP.bin is the official project provided by silicon (Si446x Standard PacketIX), I have not made any changes. Just use the tool to convert the hex file into a bin file.

Si446x Standard PacketIX linker cmd 

 

Hi all,

I am in the need of routing the SmartClock 32.678KHz external crystal frequency to a Port Pin for measuring and calibration purposes.

In order to avoid any error due to the OS scheduling I would like to do it without firmware to be responsible to toggle a pin, etc. 

I tought about using a timer but I found that:

TIMER0/1: only allows to use System Clock divided by 4/12/48 and External Clock divided by 8

TIMER2: allows to use SYSCLK, SYSCLK/12, Comparator 0, and SmartClock/8.

Using SmartClock/8 will feed the Counter/Timer with a frequency of 32.768/8=4.096KHz

I could load the timer registers to output a 1PPS signal or any other divided frequency instead of the 32.768Khz, although I'd rather to get the original not divided frequency.

TIMER3: allows to use only SYSCLK, SYSCLK/12, Comparator 1....No way.....

 

I also thought about using the PCA, that although it is stated in the datasheet:

the SmartClock source is not shown neither in the PCA diagram

 

nor in the Timebase input options:

So, can the PCA make use of SmaRTC oscillator as a source? If so, How can be done?

 

Someone could suggest to change the system clock to use SmarRTC oscillator but that will complicate the things, because I need to use the serial port to communicate the device with the ATE and store the calibration factor in Flash Memory, but I am afraid that this will be the only way to get the 32.768Khz signal routed to a port pin unless someone has a better idea.

Maybe you?

Best regards.

Fran Dominguez

I'm reading datasheet and it says UART0 has a single byte buffer on transmit/receive, and for UART1 three bytes on receive. Does that mean it only has one buffer on transmit or no buffer at all? In the later case it would mean I can write a byte for sending only after it has finished sending the previous byte?

Hi All,

Is this even possible? There is nothing I can find in the documentation. I haven't tried it yet and I am not sure where to start.

I would like to use the Iref function to measure the resistance of a resistive sensor. It is possible to set up a pin for Iref, say as a source with a known current, and then measure the voltage of the same pin?

It is is not possible, do I need to use a second pin to measure the voltage?

Thanks in advance,

Rob

Hi. I use MCU c8051f120 and have a problem with watchdog timer. My quartz oscillator have frequency 22118400 Hz. Max watchdog timing for that oscillator = 47.4 ms. I need refresh timer 1 time in 47.4 ms but i need time near 200ms, how to do it?  

Hi!

I've been using the EFM8UB20F32G-A-QFP48 and EFM8UB20F32G-B-QFP48 for a couple of years by now...

I'm still getting what it seems to be some silicon failures (about 2/3 per each 250 units tray).

Error is always the same in those "bad" chips: internal pull-ups doesn't seem to be working in pins P1.5 (pin 41) and pin P2.0 (pin 38). Connecting one pin to ground will result in the other pin showing a low state too during runtime (continuity probe shows NO connection between them). PCB tracks aren't close between.

Finally, adding external pull-ups in those pins solves the issue.

Any clues?

Thanks.

I have some uncertainty on how to obtain, install and register the recommended C51/uVision package from Keil as licensed by SILabs. Is there a How-to guide someplace? I'm not even sure what the latest (or best) version from SILabs is, or how to get it. I'm not super interested in installing the whole Simplicity Studio but will if I have to. I do want to use the uV IDE though. Thanks!  Target is mainly C8051F38x family.

Hi All,

I am using SMBUS code based on the EFM8SB2_DataLogger example. It was previously getting stuck on the SMB_Write function.

void SMB_Write (void)
{
        while (SMB_BUSY);                   // Wait for SMBus to be free.
        SMB_BUSY = 1;                       // Claim SMBus (set to busy)
        SMB_RW = 0;                         // Mark this transfer as a WRITE
        SMB0CN0_STA = 1;                     // Start transfer
}

I found that I could get it past this stage by setting SMB_BUSY to 0 before calling that function.

The code gets past that point OK but now gets stuck on SMB_Read:

void SMB_Read (void)
{
        while (SMB_BUSY != 0);              // Wait for bus to be free.
        SMB_BUSY = 1;                       // Claim SMBus (set to busy)
        SMB_RW = 1;                         // Mark this transfer as a READ
        SMB0CN0_STA = 1;                    // Start transfer
        while (SMB_BUSY);                   // Wait for transfer to complete
}

The code won't get past the first line. It seems that the SMB_BUSY flag is not being cleared so the code is stuck in a loop. I am still not entirely clear on what mechanism clears the SMB_BUSY flag after it is set, and what could cause it to fail to be cleared.

Of course this code works in the DataLogger example. In that example the slave address is defined as 0x80, whereas I understand the Si7021 to have a slave address of 0x40. Is that a factor?

Thanks in advance,

Rob

I'm trying to set port pins P0.0 and P0.2 as external interrupts, P0.1 and P0.3 as output pins and P0.4, P0.5 and P0.6 as SPI. When looking at the RM, it says that SPI can be used at any port pin, but it Simplicity Studio automatically assigns SPI to free ports from the beginning (that means port pins P0.0, P0.1 and P0.2). Does that mean that SPI can only be moved to upper pins only if all the previous pins are skipped?

EMF8BB3, with internal 24.5m clock normal, but switch to 49M clock, the chip died, in the code set 24.5m and 49M boot enable,How to switch using 49M clock correctly?

Under what circumstances will 512 bytes of the first Flash page be automatically erased?

The ref manual states that the RI bit in SCON1 is 'reset by hardware' when the rx buffer is empty.  This is not the same as UART0 where formware must rest the interrupt bit.  However, I find that the RI is NOT being reset after servicing the rx interrupt and reading SBUF1.  This is after only 1 chara sent to the UART, so not a case of having extra chars buffered.

Have fixed for now by resetting the flag in the receive service.  But am concerned that this might upset things if I'm tardy on servicing, and two (or more) characters have been received before service. If I force the flag down when there have been more than 1 character received (I know it's 3 maximum), will I lose anything?

hello sir,

in this page, i want to download usb type-c sample code.

https://www.silabs.com/products/development-tools/mcu/8-bit/usb-type-c/alternate-mode-reference-design

Software

Complete Type-C dongle and adaptor solution including, Power Delivery stack library, Billboard device source code, and sample code.

but can't download the software.

how to solve the problem?

thank you.