Some progress...
If I turn down the baud rate to 9600, as well as set a line delay of 100 ms,
the loadb transfer works, and I get 0x240 bytes of Hello World at the
address of my choice.
So, it seems to be some kind of baud rate missmatch between my board and the
PC. The console works fine in
Dear Bo,
In message 1416218063825-196499.p...@n7.nabble.com you wrote:
If I turn down the baud rate to 9600, as well as set a line delay of 100 ms,
the loadb transfer works, and I get 0x240 bytes of Hello World at the
address of my choice.
So, it seems to be some kind of baud rate
Wolfgang,
Yes, those settings are all in my .kermrc setup.
I measured the fastest pulse on my scope to 8.691 µs, which gives 1/(8.691 x
1e-6) = 115061.56 baud. Not really 115200 but is it too far from working in
your opinion? The tolerance in RS232 signalling is about 50% of the minimum
pulse
Dear Bo,
In message 1416225420788-196515.p...@n7.nabble.com you wrote:
Yes, those settings are all in my .kermrc setup.
OK. Just checking to make sure we don;t miss anything.
I measured the fastest pulse on my scope to 8.691 µs, which gives 1/(8.691 x
1e-6) = 115061.56 baud. Not really
Dear Bo,
In message 1416225420788-196515.p...@n7.nabble.com you wrote:
I measured the fastest pulse on my scope to 8.691 µs, which gives 1/(8.691 x
...
Re-reading this I stumble over the fastest pulse. Did you also
verify that the bit widths are all the same?
What about the stop bit
Well, I measured TX and RX at the target. They both have the same minimum
pulse width of about 8.7 µs.
I'm reading up on delays in c-kermit. Is there a way to set char- and line
delays somehow?
In Tera Term for Windows you can set them but they seem to have no effect on
Kermit transfers, only on
The fastest pulse = the time that one bit encompasses.
The following picture shows sending the character 'U' (0x01010101):
http://u-boot.10912.n7.nabble.com/file/n196545/tek4.png
Channel 1 shows the 'U' sent from the PC. Channel 2 shows the 'U' sent as
reply from the board, which is also
Dear Bo,
In message 1416227882897-196541.p...@n7.nabble.com you wrote:
Well, I measured TX and RX at the target. They both have the same minimum
pulse width of about 8.7 µs.
I'm reading up on delays in c-kermit. Is there a way to set char- and line
delays somehow?
You should not need any
Dear Bo,
In message 1416230584402-196545.p...@n7.nabble.com you wrote:
The following picture shows sending the character 'U' (0x01010101):
http://u-boot.10912.n7.nabble.com/file/n196545/tek4.png
Channel 1 shows the 'U' sent from the PC. Channel 2 shows the 'U' sent as
reply from
Dear Wolfgang!
Thank you for your efforts to help me out.
I keep coming back to the fact that loads works fine in 115200 baud, but
loadb does not.
If there is indeed a timing issue, it must be some handshaking in the Kermit
protocol, right? The loads command just absorbs data as it is
Dear Bo,
In message 1416231868926-196549.p...@n7.nabble.com you wrote:
I keep coming back to the fact that loads works fine in 115200 baud, but
loadb does not.
This is the funny part of it.
If there is indeed a timing issue, it must be some handshaking in the Kermit
protocol, right? The
Upon further investigation, it seems like the board DOES receive the 0x01
START_CHAR. An RS232 sniffer shows that the 0x01 is being sent, and the
board answers 'S'. It does not show on the console though.
I will need to go deeper into the code to see why it fails. Both CKermit and
TeraTerm makes
Dear bomellberg,
In message 1415622808801-195379.p...@n7.nabble.com you wrote:
Upon further investigation, it seems like the board DOES receive the 0x01
START_CHAR. An RS232 sniffer shows that the 0x01 is being sent, and the
board answers 'S'. It does not show on the console though.
I will
Dear Wolfgang,
Which sort of hardware are you using?
I am using an NXP LPC4337 cpu with external SDRAM and SPIFI flash. No
ethernet.
My config files are based upon code for the Embedded Artists LPC4357 demo
board (ea-lpc4357.h) See my first post.
Thanks,
/Bo
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