Hi, I was wondering if anyone can help me. I'm writing a simple USART application, and would like to switch between periodic timeout(RETTO) and idle...
I would think you would have to run that through an RS485 level tranciever just like a TX or RX signal depending on which direction it is going. I think what...
The SAM7 UARTs have an RS485 mode, see datasheet. A typical RS485 TRX chip has TX, RX and RX enable/TXenable. (8 pin chip) The RX/TX enable are tied together...
To explain this more fully, RS-485 is a bidirectional differential bus, or half-duplex. All parties use a single pair of wires for the differential signal....
In the year since this group was started we have accumulated 500 members and counting! I think this is becoming a very successful group, in no small part...
Hello, I have an interesting problem with the TWI in the at91sam7s64. I am trying to detect the absence of a device on the TWI bus. I had expected to receive a...
I would think the answer to this may be in the data sheet for the external device you are talking to. Does that device data sheet indicate it sends the NACK?...
I test some code by loding it into SRAM under SAM-DA and then run it with the G202000# command. What is the correct assembly code to return to SAM-BA ? I have...
HI, It's very convenient for engineers to use SAM-BA downloading ROM to CPU. However, command-line mode is a better option in manufacture. Is there anyone know...
Hello, I recently designed a board with a AT91SAM7s128 rev c in it and was wondering if anyone could help me. I have had some problems with getting the...
Hi All, I am currently putting together a cct for the SAM7X. Has anybody had any experience with this that they would like to share regarding the choice of PHY...
Hi All, I am currently putting together a cct for the SAM7X. Has anybody had any experience with this that they would like to share regarding the choice of PHY...
... external ... You lost me on that one, Al. I don't know the answer to Peter's question, but he is trying to determine the response from a device-- that is...
Hi Don Probably I was the one mentioning the Micrel device (Micrel KS8721BL). Since you haven't had any other response I will try to get the ball rolling. I...
Lee, I re-read the post and I can see where you were coming from. I presumed he had a device that was not responding with what he epected it to. Al ... ...
Lee, I must have missed something in his original post as I thought he was trying to get an external device to respond. That being what I thought he was doing...
Hello, I have worked out the sloution. Using the status register return values you can detect if an addressed device is absent. Using a Read for 1 byte: In...
Server is Apache/1.3.33 (Debian GNU/Linux). Should have been difficult. How does it appened ? ... De: AT91SAM@yahoogroups.com [mailto:AT91SAM@yahoogroups.com]...
"It doesn't matter how ..." I do not agree. It's important to understand how it happened to avoid the same immediately. May be the Administrator is analysing...
... same immediately. ... A vulnerability in their forum scripts (which are no doubt third party) must have been found. Likely that all sites that use the...
... avoid the same immediately. ... Well, OK... I agree that it's important to understand that (for administrators). Meanwhile administrator could put "under ...
Hi All I wonder whether some one can help because I am having a problem with the EMAC in the SAM7X. After setting up several 128 byte transmit buffers and...
Hello everyone! Looking in the file AT91SAM7S64.h under the heading PERIPHERAL ID DEFINITIONS FOR AT91SAM7S64 I find: #define AT91C_ID_ADC ((unsigned int)...
... Can you use the drivers included in the FreeRTOS.org download? The uIP demo has a very simple driver, the lwIP demo slightly more complex. Regards, ...
Don't know where you found this - but my code (mostly ripped from Atmel's own SAM7S-EK examples for IAR) use the following: AT91F_PMC_EnablePeriphClock (...
Morten, Thanks for the post! Does anyone know how this is working for both cases? It is an entirely different peripheral id! -H ... From: Larsen, Morten...
