SAM7 vs TMS470 vs IP2K

Started by Tony Ambrosini in AT91SAM ARM18 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 ARM17 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 ARM16 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 ARM15 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


sam7-h64 blinking_led makefile

Started by Maurizio Viterbini in AT91SAM ARM14 years ago 3 replies

dear all, I'm at beginning to work with a dev board olimex sam7-h64. I'm working with WinARM+AT91_ISP. I've uploaded the suggested...

dear all, I'm at beginning to work with a dev board olimex sam7-h64. I'm working with WinARM+AT91_ISP. I've uploaded the suggested example bliniking_led.bin (no makefile is given) with succes but I'm not able to produce it correctly, in fact, my .bin are larger and does'nt work. Somebody has the just makefile for the example or suggestions? Maurizio ------------------------------------


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

Started by ac7zl in AT91SAM ARM17 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 ARM17 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 ARM15 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?


Image Compressor

Started by Marcio Campos de Lima in AT91SAM ARM15 years ago 2 replies

I need to compress an image in bitmap format (500x500 DPI and 256 gray scale) so that I can transmit over the SAM7 serial line. Does anybody have...

I need to compress an image in bitmap format (500x500 DPI and 256 gray scale) so that I can transmit over the SAM7 serial line. Does anybody have a very light image compress that I can use in the AT91SAM7 ? Thanks Marcio


Re: USB Descriptors

Started by Jonathan Dumaresq in AT91SAM ARM14 years ago

Hi, I'm not sure about the maximum data transfer rate that you can acheive with SAM7 part, but I know that the 64 bytes EP is the biggest...

Hi, I'm not sure about the maximum data transfer rate that you can acheive with SAM7 part, but I know that the 64 bytes EP is the biggest problem to resolve.=20 I have done some test, but I could not remember what was the spec I get. I have not used the CDC Class, but the HID one. Jonathan -----Message d'origine----- De=A0: A...@yahoogroups.com [mailto:A...@yahoogroups.com] De la par...


Who is working with the SAM9263?

Started by Rick Collins in AT91SAM ARM15 years ago 5 replies

I am looking at using the SAM9263 and noticed that they use a 16.36766 MHz crystal rather than the 18.432 they use on the SAM7 eval boards....

I am looking at using the SAM9263 and noticed that they use a 16.36766 MHz crystal rather than the 18.432 they use on the SAM7 eval boards. Anyone know why they picked this value? Do they use this value on the other SAM92xx eval boards? In general, what are your experiences with these parts?


Re: Cooperative FreeRTOS on SAM7-ex256 - Interrupts

Started by "FreeRTOS.org Info" in AT91SAM ARM15 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 ARM15 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...


lwIP SAM7-EX256 problem

Started by axl_dudu in AT91SAM ARM15 years ago

Hello, I've been trying to run the webserver demo (the lwIP) that comes with the FreeRTOS. I have downloaded the specific port (exactly for...

Hello, I've been trying to run the webserver demo (the lwIP) that comes with the FreeRTOS. I have downloaded the specific port (exactly for this board) from the Olimex site but it doesn't work. I think I have a problem with the IP address or something, because I am using the exactly same board as other have done and for me it is not working. I have a router (192.168.1.1), a computer (192...


Can't write to flash memory

Started by ffredrik in AT91SAM ARM15 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


Re: Image Compressor

Started by 42Bastian in AT91SAM ARM15 years ago

Marcio Campos de Lima schrieb: > I need to compress an image in bitmap format (500x500 DPI and 256 > gray scale) so that I can transmit over...

Marcio Campos de Lima schrieb: > I need to compress an image in bitmap format (500x500 DPI and 256 > gray scale) so that I can transmit over the SAM7 serial line. Does > anybody have a very light image compress that I can use in the > AT91SAM7 ? Light in which regard ? Fast or low ram/rom usage ? What about LZW ? -- 42Bastian


Re: Cooperative FreeRTOS on SAM7-ex256 - Interrupts

Started by axl_dudu in AT91SAM ARM15 years ago

I'm using the WinARM GCC. --- In A...@yahoogroups.com, "FreeRTOS.org Info" =20 wrote: > > > Hi Richard. I have tried the flash demo in...

I'm using the WinARM GCC. --- In A...@yahoogroups.com, "FreeRTOS.org Info" =20 wrote: > > > Hi Richard. I have tried the flash demo in cooperative mode but=20 it=20 > > doesn't work. I have also tried to see if there is a problem with=20 the=20 > > interrupts, and they are NOT working in cooperative mode. I don't=20 > > know why.=20 > > I haven't made any changes to the ker


JTAG wiggler

Started by Aravind in AT91SAM ARM15 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?


SAM7 USB reset issue

Started by Foltos in AT91SAM ARM13 years ago

Hi, I encountered the following strange behavior with early SAM7S64 and SAM7S256 chips. It seems hardware keeps resetting USB registers as...

Hi, I encountered the following strange behavior with early SAM7S64 and SAM7S256 chips. It seems hardware keeps resetting USB registers as long as the BUS is in reset state. During this period UDP_IMR and UDP_CSR registers can not be changed. This can be painful if the firmware tries to configure endpoint0 before enabling the USB pull-up resistor if the USB cable is connected. I tested...


UDP pull-up control

Started by Scott Miller in AT91SAM ARM17 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