Post Created date
Wireless Voting System by RFM12 Module
I agree with joemorin's post (11). I've long used RadioHead. It's reliable datagram protocol option will deal with collisions and lost packets via retransmissions and random...
Wednesday, 14 October 2015 - 00:36
malloc from interrupts
Some but very few implementations of malloc() and free() are coded to be reentrant. This means that if one of these functions was running and interrupted to an ISR that called one...
Saturday, 19 September 2015 - 20:44
SAMD20 delay_us() issue
cycle count loops are really not prudent.   Often, the systick timer's count is used for making microsecond delays and computing number of microseconds since x. Interpolate a...
Sunday, 13 September 2015 - 02:21
help in wireless communication between two atmega328p using nRF24L01+ ( mirf library )
mostly Atmel products discussed here, rather than Nordic.
Sunday, 13 September 2015 - 02:17
malloc from interrupts
malloc() from an ISR is at the least imprudent, and frankly showing naivete' about embedded systems. Most embedded systems shouldn't malloc() or new()  as n C++ at the...
Friday, 11 September 2015 - 04:22
PCB antenna vs chip antenna
antenna gain is important, if you can cope with directional antennas. Remember too, as said above, antenna gain can be had in the vertical plan. Antennas with patterns like...
Monday, 31 August 2015 - 05:32
LWIP on the EVK1105
Infinitely easier to do IP networking on embedded systems using the Wiznet IP stack off-load modules. Like   Your microprocessor can used...
Monday, 31 August 2015 - 05:02
Migration from 8-bit to 32-bit
Atmel has quite some work to equal ST and the repertoire of ST-based small boards.  
Wednesday, 26 August 2015 - 00:19
SAMR21 some doubts about stack size and ASF usage
  Here's what I've done in the past... Assuming there's a 1KHz or so systick interrupt... In that ISR, add a couple lines of code to keep the stack usage depth max.. a...
Sunday, 16 August 2015 - 23:20
SAMR21 some doubts about stack size and ASF usage
there are tools and DIY methods to get a good estimate on stack size needed. Hard part is heap, if used at all.
Saturday, 15 August 2015 - 21:19
SAMD21 SD Card SPI Max Speed
why can't it do 24MHz like competitors' ? w/DMA, SDIO 1 bit or 4 bits.
Saturday, 15 August 2015 - 21:16
Casting double to uint16_t for usart_write
  Never driven a car but I MUST get a race car and drive in the formula one race next week in Munich.    
Wednesday, 12 August 2015 - 04:48