September 28, 2022, 10:54:31 pm

Recent posts

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1
MSP430 / Re: MOD EKG Board Uart Communi...
Last post by LubOlimex - Today at 10:25:40 am
No flow control.
2
MSP430 / MOD EKG Board Uart Communicati...
Last post by daekhan - Today at 09:20:13 am
Hi...
I purchased MOD EKG Board.

MSP430FG439 MCU use USART Port and send to ADC data quickly.

Between MCU and Pc(or aduino), need not Flow Control?

Thanks..
3
STMP1 / Re: STMP1 power requirements
Last post by thom_nic - September 26, 2022, 06:04:08 pm
Thanks very much!  I see that both 3.3V pins on the the STMP1-SOM have unpopulated resistors. (R29 and R31)  Appreciate the explanation!
4
MSP430 / Re: USB with T5510-Board
Last post by LubOlimex - September 26, 2022, 03:26:48 pm
We haven't used it to program the board via it. However, for general-purpose programming approach it is just a regular USB. For example, in our testing routines we test the USB connection, but the project is made with IAR EW for MSP430 and downloaded to the board via JTAG.
5
STMP1 / Re: STMP1 power requirements
Last post by LubOlimex - September 26, 2022, 03:22:17 pm
I answered in a hurry and the details weren't correct. My bad. I will also edit the above post.

The A13-SOM requires only 3.3V to operate.

The STMP1-SOM requires only 5V to operate.

However, both SOM boards would ignore the other power supply, so it is fine to have both 3.3V and 5V applied from the bottom board as long as you use the GPIO headers for the connection. This is because in the A13-SOM's design the 5V pin from the connector goes nowhere, and in STMP1-SOM the 3.3V wire is disconnected (resistor not placed on purpose). Check these excerpts from the schematics:




6
UEXT / ModRTC2 availability
Last post by JeanFrancois - September 25, 2022, 08:24:07 pm
Good day,

Apparently the ModRTC2 based on DS3231 is and will likely remain unavailable for long time, since the part seems unavailable and probably needs a replacement such as DS3232.

Can please Olimex inform about the module planned availability and eventual update ?

Thanks

Jean-Fran├žois
7
A20 / Re: A20 Olinuxino Lime UART pi...
Last post by vnv - September 23, 2022, 06:36:11 pm
Big thank you!
8
STMP1 / Re: STMP1 power requirements
Last post by thom_nic - September 23, 2022, 04:41:56 pm
> Both A13-SOM and STMP1x-SOM require only 5V from the bottom (EVB) board.

I'm reading the A13-SOM-um.pdf, revision B, March 2015 which states in 2.3.1:

QuoteYou would need to provide 3.3V DC to one of the two following locations:
1. UART1 pin named "3.3V"; you can use any GND pin available at the board
or
2. Connector GPIO-1's pin 1 (3.3V) and pin 2 (GND)

Also looking at the schematic A13-SOM_sch.pdf for board rev D, I see LCD_TR pin 1 is labelled +5V however I don't see any power supply circuit that takes 5V to generate 3.3V. 

If the A13-SOM actually can take 5V that is great however I don't understand how :)  Thanks in advance!
9
MSP430 / Re: USB with T5510-Board
Last post by FranzPeter - September 23, 2022, 02:54:48 pm
Dear Experts!
Hard to believe, that nobody has used the USB-Interface with the T5510-Board. So the USB-connector on it was never used? So it's pointlessly on the board?
Maybe I am wrong.
Franz Peter
10
A20 / Re: A20 Olinuxino Lime UART pi...
Last post by LubOlimex - September 23, 2022, 10:15:56 am
Go here and at the bottom you can find the definitions in Olimage Linux:  https://github.com/OLIMEX/olinuxino-overlays/tree/master/sun7i-a20

Inside the definitions you can find what pins you can use, for example for UART3 we can see:

Quoteuart3_pg_pins: uart3-pg-pins {
            pins = "PG6", "PG7";
            function = "uart3";

Which means UART it is pins PG6 and PG7. Then you download and inspect the schematic where is PG6 and PG7:

https://github.com/OLIMEX/OLINUXINO/blob/master/HARDWARE/A20-OLinuXino-LIME/1.%20Latest%20hardware%20revision/A20-OLinuXino-Lime_Rev_I3.pdf

It is on GPIO1 pins #17 and #19.

Remember to run olinuxino-overlay script to enable the desired UARTs.
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