Its been a fair bit of time since I last posted, mostly attributed to the fact that I’m no longer living down south and have moved home for the next two weeks until I return to university! None the less, after re-arranging my room at home to my liking (my family have the obsession of […]
This is only a short post really. With my watch, I’d been trying for AGES to try and get the RTC working with the external crystal. It might seem simple to some but it was certainly not simple to me and ST don’t give an example, unlike most things; in their standard peripheral downloadable pack. I […]
Well! Apart from having a nice little travel into London to see the family and a haircut, what have I been up to today you ask? The answer to that resides in my Colour graphics library! Its not very often that I improve on my libraries unless I need to, or I’m bored as I’m […]
Well! Today, I didn’t feel like doing anything particularly productive so libraries were pretty much not an option. Instead, I decided to make a really simple oscilloscope which merely displays the current sample voltage and a trace of the samples on the screen using my ILI9163 and graphics libraries. The input voltage is specified from […]
Since printing floating points is probably much more important than the speed of this library, I’ve included a new function that allows the printing of floating point numbers! The function explanation is really simple and here it is: int8_t PNumF(float Num, uint8_t X, uint8_t Y, uint8_t Prec)Just like with the standard PNum function, this function […]
A few months back, I bought myself a cheap SR04 ultrasonic rangefinder (Datasheet: http://goo.gl/LBZeDG), as per off the magical eBay (Example – Link will expire: http://goo.gl/h9j79O). As you can imagine, these things are ridiculously cheap at a mere 99p inc. p+p. How that is even profitable, I’ll never know! They’re actually pretty nice devices and allow for […]
Well in light of my recent hardware addition, I’ve decided to convert the basis of my HD44780 code into a standalone library. I’ve also added the ability to print signed integer numbers with padding with my whole code including examples compiling to < 3.5k at O0 optimization! Snazzy or what, with O3 optimization, I’ve managed […]
And voila! As I said in one of the last two posts (Initial post: https://hsel.co.uk/2014/08/14/stm32f0-discovery-board-and-the-hd44780-lcd/ and integrating a charge pump for backlight control: https://hsel.co.uk/2014/08/14/stm32f0-discovery-board-with-hd44780-and-integrated-charge-pump/), I’ve now included a generic LED backlight PWM controller using one of the standard GPIO pins. I’m using GPIOA Pin 6 to drive the LED backlight and I’ve integrated a 4bit (16 step) backlight […]
Well! I’ve had a fair few requests in the past few weeks about how I got the HMC5883L digital compass IC working with my STM32F0 discovery board (as shown in a previous post: https://hsel.co.uk/2014/05/29/hmc5883l-magnetometer/). I’m really not a fan of the I2C implementation on the STM32F0 discovery board as many things don’t seem particularly apparent at […]
So! I decided that I wanted to properly test my servo tester (testing a tester… wuhhh?) so I bought myself some really cheap servo’s on eBay. When I say really cheap, I mean REALLY cheap! I spent a whopping £3.99 on a pair and that was with postage included (eBay Item: http://goo.gl/fACHpo as per usual, link […]
Harris' Electronics 