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Creat delay function using count and loop
No matter which method you use, you will need to know what the system clock frequency is. The hardware counter AVR32_COUNT is incremented every clock cycle. You can reset it with...
Wednesday, 8 May 2019 - 17:24
SOLVED:unusual behaviour of if statement
Check if the DOR1 (Data Overrun Flag) in UCSR1A is set. You might be losing characters because your ISR has a a potential time-delay while(((UCSR1A&(1<<UDRE1))==0));
Friday, 19 April 2019 - 06:36
atmega 128 doesn't return from a function even if Extended.M103C fuse bit is disabled
Enabling an interrupt and not providing a handler is a time-proven method to generate frustration. Many modem-like devices will echo what they receive. From an ESP8266 datasheet...
Friday, 19 April 2019 - 06:13
atmega 128 doesn't return from a function even if Extended.M103C fuse bit is disabled
UCSR1B|=(1<<TXEN1)|(1<<RXEN1)|(1<<RXCIE1); enables the USART Rx Complete interrupt. Do you have a handler for that interrupt ?
Friday, 19 April 2019 - 05:16
Rounding ADC values properly, ATmega328p-PU
All the calculations are done with integers, therefore the x10 scaling of Vref is a way to get the tenths-of-volts. eg. with a Vref of 5.08, an input voltage of 3.969 V produces...
Saturday, 13 April 2019 - 23:55
Rounding ADC values properly, ATmega328p-PU
On the AVR8s, if Vin Vref then you need to scale it down (eg via a resistive divider on the input) to avoid damage and also to not saturate the ADC count, therefore 'your Vin' =...
Saturday, 13 April 2019 - 00:14
Atmega128 SPI Communication CPHA Change
In READ_register() you send 32 bits. Quote:7.5.1 Serial Interface ... The data packet (between falling and rising edge of STE) is 24 bits long and is serially shifted into SDIN...
Thursday, 4 April 2019 - 05:56
a proper way of entering library initialization parameters
Method 1 might result in smaller code size. My preference would be for something like ; uart_init( baud_rate, U_8DATABITS, U_NOPARITY, U_1STOPBIT ); because i can see at a...
Thursday, 4 April 2019 - 03:41
Atmega128 SPI Communication CPHA Change
Does IQ_mode_measure(); control the /STE input to the AFE4300 ?
Thursday, 4 April 2019 - 03:29
Idea: Code Review Groups?
A lot will depend on the egos of all the participants, ie. some reviewers might get upset if their inputs are not implemented and/or the target might discover that they have...
Wednesday, 3 April 2019 - 05:21
Nested interrupt
Answer = scenario 2. Scenario 3 will occur if your ISR takes too long to process a character. From the Reset and Interrupt Handling section in the datasheet Quote:When an...
Saturday, 30 March 2019 - 02:12
need help: timer0 intr service on mega328p
There is no interrupt handler for the Timer-Overflow interrupt TIMSK0 |= _BV(TOIE0); /* needed ? */ Yes, you will need to do sei(); /* enable...
Saturday, 16 March 2019 - 22:10

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