Does Bob have an Embedded page?
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Well in all fairness I need to ask a question on C programming to make sure I am not missing something. I was in the middle of writing a document (not related) and thought :bob: might know. So in all fairness I deserved the trolling.
I do IoT stuff, which is related and similar, and am diving into more embedded here. For my part, I just ask C questions in the C section, whether it's embedded or not. What's harder is asking about the things where the hardware and firmware meet, but typically I'll just consider that a programming question, tag it as best I can, and then make sure I'm clear about what I'm doing in the description. There are enough embedded devs here I think you'll be able to cast a net and get something that way.
To err is human. Fortune favors the monsters.
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Hi All, Do we have an Embedded page or shall I ask in C/C++ forum..? Glenn.
Anyway, MS is coming out with a G5 ARM Surface Go; and VS can generate ARM code ...
"Before entering on an understanding, I have meditated for a long time, and have foreseen what might happen. It is not genius which reveals to me suddenly, secretly, what I have to say or to do in a circumstance unexpected by other people; it is reflection, it is meditation." - Napoleon I
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Anyway, MS is coming out with a G5 ARM Surface Go; and VS can generate ARM code ...
"Before entering on an understanding, I have meditated for a long time, and have foreseen what might happen. It is not genius which reveals to me suddenly, secretly, what I have to say or to do in a circumstance unexpected by other people; it is reflection, it is meditation." - Napoleon I
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I do IoT stuff, which is related and similar, and am diving into more embedded here. For my part, I just ask C questions in the C section, whether it's embedded or not. What's harder is asking about the things where the hardware and firmware meet, but typically I'll just consider that a programming question, tag it as best I can, and then make sure I'm clear about what I'm doing in the description. There are enough embedded devs here I think you'll be able to cast a net and get something that way.
To err is human. Fortune favors the monsters.
Not to worry I solved the original problem and as is the case meant something else broke, bodged that. Now being left over night to see what breaks next... The LCD driver is a pain yes, you can send it an integer or float but will display a decimal point? Some times yes some times no, and will it return I2C address? (so I can hook up a real time clock that use I2C) No is the answer. Shall I try to get the data sheet, oh company went bust and some genius bought a load of LCD's on Ebay... :rolleyes: Circuit diagrams, who needs those! Glenn (I need :beer:)
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Not to worry I solved the original problem and as is the case meant something else broke, bodged that. Now being left over night to see what breaks next... The LCD driver is a pain yes, you can send it an integer or float but will display a decimal point? Some times yes some times no, and will it return I2C address? (so I can hook up a real time clock that use I2C) No is the answer. Shall I try to get the data sheet, oh company went bust and some genius bought a load of LCD's on Ebay... :rolleyes: Circuit diagrams, who needs those! Glenn (I need :beer:)
You're probably using a crappy graphics driver. I have one that may work better for you depending on the type of MCU you're using, but your best bet is to actually use sprintf(tmp,"formatspecifier",value); and then display tmp so you have total control over the formatting of it.
To err is human. Fortune favors the monsters.
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You're probably using a crappy graphics driver. I have one that may work better for you depending on the type of MCU you're using, but your best bet is to actually use sprintf(tmp,"formatspecifier",value); and then display tmp so you have total control over the formatting of it.
To err is human. Fortune favors the monsters.
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You're probably using a crappy graphics driver.
Graphics Driver I wish, No RTOS a while(1) or a for(;;)...
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sprintf(tmp,"formatspecifier",value);
I would have to load stdio for sprintf()... no room. Think it's the I2C having a bit of noise. Will play more tomorrow. Thanks Glenn
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You're probably using a crappy graphics driver.
Graphics Driver I wish, No RTOS a while(1) or a for(;;)...
Quote:
sprintf(tmp,"formatspecifier",value);
I would have to load stdio for sprintf()... no room. Think it's the I2C having a bit of noise. Will play more tomorrow. Thanks Glenn
I meant the library you're using to communicate to your I2C or SPI display. Clearly, I don't know enough about your platform. It might be simpler to just roll your own ftoa type function
To err is human. Fortune favors the monsters.
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I meant the library you're using to communicate to your I2C or SPI display. Clearly, I don't know enough about your platform. It might be simpler to just roll your own ftoa type function
To err is human. Fortune favors the monsters.
Interesting...get the scope on the pins lots of noise I think the fault is with the board, I'm gonna start probing... Also know of a good I2C reference... ;)
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Richard, Richard. I don't think I've seen you troll anyone before. :-D
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The fox knows many things, but the hedgehog knows one big thing.He was just being a dick. [rim-shot]
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Interesting...get the scope on the pins lots of noise I think the fault is with the board, I'm gonna start probing... Also know of a good I2C reference... ;)
Check the values of the pullup resistors. Too low and the drivers can't sink the current. Too high and they can't deal with the capacitance of the wires (sounds like you must have wires to an off-board display). You might try twisting wires, too, thought that's more to keep radiated noise out of other circuits.
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Check the values of the pullup resistors. Too low and the drivers can't sink the current. Too high and they can't deal with the capacitance of the wires (sounds like you must have wires to an off-board display). You might try twisting wires, too, thought that's more to keep radiated noise out of other circuits.
Yup I know, wires all over the place, but I did look into that. I think I may be on to the issue the board, I am using was 'claimed' from a pile of write offs and given to me (with out telling me!) so a day spent looking for the circuit diagram and hunting with a Toneohm leads me to think the I2C chip is not properly grounded took it off had a look, missing Gnd pad! start to do some surgry to the board and get caught with a meeting...more on Monday coming, I hope thanks though:thumbsup:
