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USART in SPI mode
I see I have this new feature with the ATmega88. In trying to understand what that benefit of using the USART in SPI mode all I can see in the datasheet is: - double buffered -...
Monday, 15 September 2008 - 12:14
[Solved] FatFS and rtc.c
Has anyone got Chan's rtc.c working? I can not get the ports that he uses for his I2C implementation, to work properly. #define SCL_LOW() DDRC |= 0x01 // SCL = LOW #...
Tuesday, 12 August 2008 - 06:16
FatFS, a few basic questions
I have gone through the tutorial "Getting SD/MMC card workin painlessly with FatFS" and managed to get to the point where I could get the file listing. So, I decided to try the...
Saturday, 9 August 2008 - 14:28
Project - MrData SD, no response to CSD
Has anyone got MrData up and running? I am not getting a response to the CSD command, which seems necessary to proceed with the rest of the program. As I have been having...
Friday, 1 August 2008 - 10:54
redefinition of variables in macros
WinAVR 20071221 and I have the using the following #defines for a few years: #define CRITICAL_SECTION_START uint8_t _sreg = SREG; cli() #define CRITICAL_SECTION_END SREG = _sreg...
Sunday, 13 July 2008 - 12:14
ATmega 88, SPI and PortB0 problem
ATmega88. CKOUT fuse unprogrammed, no portB interrupts enabled (PCINT0) or generated and no timers enabled (ICP1). I have read page 85 in the datasheet. If I pull PORTB0 high my...
Sunday, 13 July 2008 - 11:44
BLIPS and programming EEPROM
When I try to load an .eep file I get the following error in the PC application window: Quote: Run Time Error '6' Overflow Have other people managed to successful load a few...
Thursday, 19 June 2008 - 11:16
TWI (I2C) problem
Using Peter Fleury's I2C library, as a basis, I have this working code: void download_EEPROM1_command(void) { uint8_t data; int16_t index = 0; // read previously...
Wednesday, 5 September 2007 - 11:10
ADC - discard first conversion query
I have seen snippets of ADC code where the first conversion is discarded. Carefully reading the ATmega32 datasheet there are references to discarding the first conversion when...
Friday, 17 August 2007 - 09:34
csRTOS a multi-tasking scheduler for the AVR
There has been quite a bit of discussion around issues associated with this scheduler, so I thought a separate thread was warranted. See previous thread: [url]https://www....
Thursday, 14 June 2007 - 21:39
OPEX - want to update to current WinAVR
OPEX (downloaded off this site) looks attractive as a co-operative scheduler. I am having a few problems updating it and was hoping someone would know the following: -...
Wednesday, 16 May 2007 - 01:36
System clock frequency Atmega series
Where in the datasheets for any of the ATmega series do you find the relationship between the CPU frequency (say 3.6864MHz) and the system clock frequency? By measurement I have...
Tuesday, 17 April 2007 - 12:47

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