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BCD output from RTC - is this really BCD?
HI all. I am reading the seconds register from a DS1307 RTC and using Realterm to display the values as hex. From the data sheet the seconds should be stored as BCD as in the pic...
Saturday, 24 August 2019 - 12:03
Is this mistake at: 6.17.1 AVR Named Address Spaces?
Hi - I was reading the info at https://gcc.gnu.org/onlinedocs/gcc/Named-Address-Spaces.html It is written: char my_read (const __flash char ** p) { /* p is a pointer to...
Tuesday, 6 August 2019 - 09:17
Trying to understand this structure and accessing
Hi all I have some pre-written code from https://github.com/martinmarinov/AATMEGA644PandSi4703 which drives a graphics LCD. I am displaying a startup message with an ASCII...
Friday, 9 November 2018 - 22:56
compiler definitions file incorrect for ATmega164PA ?
Hi -  I am using a ATmega164PA and noticed in the definitions file (iom164pa.h) that the interrupt vectors are defined starting as follows: /* Interrupt vectors */ /* Vector...
Friday, 2 November 2018 - 21:22
what is this array definition format?
Hi all - I am trying to use some code from: https://github.com/martinmarinov/AATMEGA644PandSi4703 In the file bitmaps.h there are some arrays defined for a graphics lcd as follows...
Thursday, 1 November 2018 - 17:42
understanding GPIO open drain functions
Hi -  In the documentation for the UC3, we have gpio_clr_gpio_open_drain_pin //** \brief Drives a GPIO pin to 0 using open drain.and gpio_set_gpio_open_drain_pin //** \...
Friday, 5 October 2018 - 13:03
Sprintf and displaying negative values
Hi all - I have some code happily reading from an MP6050 accelerometer/gyro and displaying values to the serial port with their appropriate signs. The code is 2's complement data...
Thursday, 4 October 2018 - 09:26
Pin mapping duplication on AT32UC3B
Hi all - I just to see if I am interpreting this correctly from the data sheet of the AT32UC3B: (I have a good old EVK1101 kit) According to what I am reading on Table 4-1 (...
Wednesday, 29 August 2018 - 06:45
Multiple definitions happens if I assign value when declared
Hi- I have a main.c file and an included header (my_funcs.h) There is also a my_funcs.c and a ny_funcs.h file in the project.   In the my_funcs.h file I have - (a fragment...
Monday, 27 August 2018 - 12:25
displaying temperature values; interpreting the sign bit...
Hi all- I have this code happily displaying temperature values from an MPU6050 accelerometer / gyro using an AVR. But now I want to use an AVR32 - The present code (in part) is:...
Sunday, 26 August 2018 - 12:56
IS there a more Elegant way of doing this? - (I2C writes)
Hi all I am using a AT32UC3 to do I2C writes to an MPU6050 accelerometer/gyro board. Below is a fragment of my code doing  the writes. I am doing single byte writes...
Sunday, 26 August 2018 - 10:06
Quick check if 5110 LCD is alive?
Hi - I am trying to interface a 5110 LCD but am wondering if the display is dead (bad contacts maybe) - should the display area show some darkening (or anything?) when...
Tuesday, 14 August 2018 - 16:30

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