Coridium News and Updates

When News breaks, ... we fix it

A while back I wrote a couple line example for an IAP (In Application Program) access from BASIC. Tod took this and expanded it to access the EEPROM of the ARMstamp.

This code takes advantage of the inline ASM instructions in ARMbasic. In the LPC11U37 ARMstamp access to the EEPROM is only through IAP calls.

Below is the code for that.

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OSHpark got me boards before UPS got me parts. Both came together yesterday, so I built up 6 PCBs, sending some off to Tod and Olzeke beta testers. Grabbed a 4x20 New Haven display that was sitting here in a bin, and mated the 2 together. It passed the smoke test, and with a 1 line program, I could see the default display come up.(alternate lines on and off)

IO(3)=1     ' turn on Backlight transistor drive

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Tod's been working on a super-duper breadboard system. No doubt it has every bell and whistle imaginable piled on top of a kitchen sink. One feature is a line based LCD. Now these are real cheap these days, but they usually use a PCF8574 I2C I/O expander. Not that I2C is bad, but to write a byte into the LCD takes at least 8 I2C operations, not to mention that for whatever reason I2C takes lots of interrupts and states in the software. Serial UARTs and SPI both potentially faster and the hardware on the micro is such, you write a byte and go away.

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Many DIY's shy away from surface mount resistors and capacitors in boards they design. But I think once you do a couple it is actually quicker to use 1206 components than bending leads for through hole parts and flipping the board over and soldering, then trimming the leads.

So here I am demonstrating some SMT soldering with a 1206 resistor. Using a Hakko E80 iron, tin-lead solder, +2.50 reading glasses and a good light, nothing up my sleve.

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Olzeke took the lockdown and holidays to complete a KiCAD project. He built a breakout board for the LPC54005 and LCD display.

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