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SAM7 vs TMS470 vs IP2K

Started by Tony Ambrosini in AT91SAM ARM19 years ago 28 replies

Has anyone here ever come across the new ARM micros that TI came out with (supposedly)? Does anyone know how real the TI...

Has anyone here ever come across the new ARM micros that TI came out with (supposedly)? Does anyone know how real the TI parts are? If they are, what makes the SAM7 better? I have been having trouble finding comparison data. Also, I have heard of people using


SAM7 Tutorial or Beginers Guide?

Started by bty219622 in AT91SAM ARM18 years ago 1 reply

Hello, Dodes anybody knows of a web tutorial or beginers guide for programming AT91SAM7's? I see there are few for LPC2100 but I'm not sure...

Hello, Dodes anybody knows of a web tutorial or beginers guide for programming AT91SAM7's? I see there are few for LPC2100 but I'm not sure that reading the LPC is appliable to the SAM7. Thanks.


SAM7 TWI/I2C driver read (24xxx EEPROM)

Started by Pierre Laviolette in AT91SAM ARM17 years ago 2 replies

Hi, Does anybody have a driver for SAM7. I have my own and write works fine, but read does not work properly; it only works once....

Hi, Does anybody have a driver for SAM7. I have my own and write works fine, but read does not work properly; it only works once. Anyways, I am investigating, but in the meantime I thought I'd post in case someone has a working example;this could save me some time. Thanks in advance. Pierre.


SD/MMC card on an sam7-ex256

Started by axl_dudu in AT91SAM ARM16 years ago 29 replies

Hello, does anyone has a working example for controlling the SD/MMC card on an at91sam7 (preferably with the olimex's board sam7-ex256)? I have...

Hello, does anyone has a working example for controlling the SD/MMC card on an at91sam7 (preferably with the olimex's board sam7-ex256)? I have been struggling to get working an example that someone gave me but it gets stuck somewhere in the init part. Thanks, Tudor


SSC I2S On the SAM7...Does Anyone Have An Example of Code That Works?

Started by ac7zl in AT91SAM ARM18 years ago 1 reply

AT91SAM7...nifty chip... but I have to admit to considerable frustration trying to get this thing to do what I want. Basically, I have the...

AT91SAM7...nifty chip... but I have to admit to considerable frustration trying to get this thing to do what I want. Basically, I have the AT91SAM7S-EK board attached by ribbon cable to a vectorboard on which I've placed one of TI's TLV320AI23B codecs. The larger goal is to use the SSC controller in the Sam7 to talk to the codec. I intend to sample low freq audio and generate low-freq test


How to create nested interrupts for the SAM7?

Started by ratb...@... in AT91SAM ARM18 years ago 3 replies

In one the posts someone wrote: \

In one the posts someone wrote: \


Atmel SAM7 Tx interrupt

Started by chipburnssc in AT91SAM ARM17 years ago 3 replies

I'm having some trouble with the Tx interrupt on the USART. Periodically (very intermittently) it does not fire which causes my system to...

I'm having some trouble with the Tx interrupt on the USART. Periodically (very intermittently) it does not fire which causes my system to lock up. Anyone seen this problem?


Re: Cooperative FreeRTOS on SAM7-ex256 - Interrupts

Started by "FreeRTOS.org Info" in AT91SAM ARM16 years ago 1 reply

> I'm using the WinARM GCC. I have never used WinARM, but assume it to be the same as GNUARM and YAGART= O as far as functionality and usage...

> I'm using the WinARM GCC. I have never used WinARM, but assume it to be the same as GNUARM and YAGART= O as far as functionality and usage goes... Take a look in port.c, at the function prvSetupTimerInterrupt(). This installs a different handler depending on the pre-emption setting. The tic= k ISR is set to either vNonPreemptiveTick() or vPreemptiveTick(). None of th= e interrupt


AT91SAM7X256 and FreeRTOS

Started by axl_dudu in AT91SAM ARM17 years ago 3 replies

Hi everybody (especially Richard), I am using Programmers Notepad and trying to get the FreeRTOS running on an AT91SAM7X256 (SAM7-EX256 board)....

Hi everybody (especially Richard), I am using Programmers Notepad and trying to get the FreeRTOS running on an AT91SAM7X256 (SAM7-EX256 board). I know I should begin with the demos provided with the FreeRtos but I could compile any of them as they are all made with Rowley or IAR. So I have searched the internet and found a port at this address: http://www.siwawi.arubi.uni- kl.de/avr_pro...


Can't write to flash memory

Started by ffredrik in AT91SAM ARM16 years ago 11 replies

Hi all, I have encountered a problem when storing user data in the program flash memory. I use the normal code: mc-> MC_FCR =...

Hi all, I have encountered a problem when storing user data in the program flash memory. I use the normal code: mc-> MC_FCR = AT91C_MC_WRITE_KEY | AT91C_MC_FCMD_START_PROG | (page < < 8); Writes below 0x100000 work fine, at this address and above, the processor crashes. The problem seems to occur with various SAM7 models I have tried. Any idea? Is it a mapping issue? Thanks


JTAG wiggler

Started by Aravind in AT91SAM ARM17 years ago 2 replies

Hi i recently bought an ARM7 kit from olimex SAM7EX256.i plan to put together my own jtag wiggler. but there seem to be so many schematics on...

Hi i recently bought an ARM7 kit from olimex SAM7EX256.i plan to put together my own jtag wiggler. but there seem to be so many schematics on the net. Does anyone have the schematic of the wiggler which is known to work with the olimex board or any olimex board with SAM7?


UDP pull-up control

Started by Scott Miller in AT91SAM ARM19 years ago 5 replies

I'm laying out the USB interface portion of my board right now, and I've got a question on the pull-up control. The SAM7 datasheet shows a...

I'm laying out the USB interface portion of my board right now, and I've got a question on the pull-up control. The SAM7 datasheet shows a simple BJT controlling the pull-up, but the AT91SAM7S-EK board appears to use an n-channel FET driving a p-channel FET. Why the added complexity? I've used that type of circuit before, but only for switching a lot of current. Th


Yet another problem with Rev B AT91SAM7's

Started by techguy2000 in AT91SAM ARM9 years ago 18 replies

We've been using the SAM7 chips for several years with very few problems, but Atmel seems to have introduced problems with the Rev...

We've been using the SAM7 chips for several years with very few problems, but Atmel seems to have introduced problems with the Rev B devices. At least that seems to be where the troubles started. We've already hit the "must reset SPI port twice" unpublished errata. In talking to Atmel support, they were aware of the problem, but hadn't published as an errata. Nice product support. ...


Re: Cooperative FreeRTOS on SAM7-ex256 - Interrupts

Started by "FreeRTOS.org Info" in AT91SAM ARM16 years ago 3 replies

> Ok! I've made the changes. So this might be the problem. The=20 > interrupts are working, but the tasks do not. What should I do next? So...

> Ok! I've made the changes. So this might be the problem. The=20 > interrupts are working, but the tasks do not. What should I do next? So the tick interrupt now runs. Are you still installing other interrupts? If you have just the tick interrupt running, do the flash tasks now execute= ? Can you place a break point in the flash task to be double sure it is not running. Regards, Rich


uClinux port for at91sam7se512

Started by zahiddreamz_2004 in AT91SAM ARM15 years ago 2 replies

Hi All, I have an ATMEL SAM7SE512 EK board. I am trying to port uClinux on it. But still unable to find the success. I have some porting...

Hi All, I have an ATMEL SAM7SE512 EK board. I am trying to port uClinux on it. But still unable to find the success. I have some porting experience with Linux kernel onto AT91SAM9263-EK board. I have read from portal regarding porting uClinux on to SAM7 series. In that portal he asked us to the existing support for ARM7TDMI controller(AT91x40). I found that portal was fine because my ARM core i...


USB - Reconnect process after disconnect/ halt

Started by vt_snapshot in AT91SAM ARM18 years ago 3 replies

Hello SAM7 Group, I got the USB to work via the CDC Serial port emulation. When I connect, it maps in as the next available COM port. ...

Hello SAM7 Group, I got the USB to work via the CDC Serial port emulation. When I connect, it maps in as the next available COM port. In my case, it maps as COM3. If I ever unplug or stop my program for a recompile, I lose the COM3 link and must exit the Terminal program and re-enter the terminal program to have it find COM3 again. This


GnuArm: "Hello World" program including makefile for SAM7S256?

Started by skymab in AT91SAM ARM19 years ago 4 replies

Is there a "Hello World" program which includes the makefile for SAM7S256? I have some problemes getting started with GnuArm and SAM7 ...

Is there a "Hello World" program which includes the makefile for SAM7S256? I have some problemes getting started with GnuArm and SAM7 Thx in advance Thomas Pototschnig


AT91SAM7X256 Eagle library and/or project?

Started by glennskidoo in AT91SAM ARM18 years ago 5 replies

Does anyone have an Eagle library part or project using the AT91SAM7X256? Besides the development board from Atmel and the upcoming board...

Does anyone have an Eagle library part or project using the AT91SAM7X256? Besides the development board from Atmel and the upcoming board from Olimex, are there any other boards that anyone knows of that uses this chip? http://www.olimex.com/dev/sam7-ex256.html Thanks. ------------------------ Yahoo! Groups Sponsor --------------------~--> See what's inside the new Yahoo! Groups emai


USB connection Failing for olimex SAM7EX256 board

Started by skillgames2004 in AT91SAM ARM16 years ago 3 replies

Hi All, I recently bought Olimex SAM7EX256 board. When I connect it to the USB port, it is not getting recognized by the WinXP. If I start...

Hi All, I recently bought Olimex SAM7EX256 board. When I connect it to the USB port, it is not getting recognized by the WinXP. If I start SAM-BA v2.6 and try to connect to \usb\ARM0, it says 'Failed to open Connection'. I tried Erasing Flash by ERASE pin as per this tutorial http://www.sparkfun.com/datasheets/DevTools/SAM7/Your%20Atmel%20Board%20May%20Not%20Be%20Dead.pd f and also TST pi


Re: Cooperative FreeRTOS on SAM7-ex256

Started by Mark Bayern in AT91SAM ARM16 years ago 4 replies

IME biggest difference between preemptive and cooperative is how and when the task switch occurs. Remember that in cooperative mode, "Context...

IME biggest difference between preemptive and cooperative is how and when the task switch occurs. Remember that in cooperative mode, "Context switches only occur if a task blocks, or explicitly calls taskYIELD()". Do your tasks explicitly call taskYIELD()? If a task is just an infinite loop, it will never give up control. Preemptive mode will pre-empt the task anyway. Cooperative mode will n...



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