I2C and usart together on ATMega8

Gootes · 2006-10-07T13:46:27+00:00

Hi all!I'd like to use my ATmega8 as interface between USART and i2c (and for someother things too, but it's not important for my problem). When i writesupport for I2C in my code (i'm using Procyon AVRLib) everything is OK, butwhen i try to add support for UART, compiler (avr-gcc) says me Error. Here is my code: Code:#include #include #include "i2c.c" // i2c library #include "uart.h" // uart library // headers /* Here is defined some constants like i2c addresses */ void inicializaceI2C() { // setting I2C i2cInit(); i2cSetLocalDeviceAddr(0xA8, TRUE); } void inicializaceUart() { // setting UART uartInit(); uartSetBaudRate(9600); } int main() { inicializaceI2C(); inicializaceUart(); while(1) { } return 0; } When i try to build it, AVRstudio says me, uart.h is in conflict withuart2.h (included by i2c.c). When I try compile this code without Code:#include "uart.h" // uart library avr studio says me: Code:error: too few arguments in function uartSetBaudRate When I try modify my code to using UART0, avr studio says me, uart0nonexists. Have you any idea how to use i2c and uart together on ATMega8 or should Iuse bigger AVR with 2 uarts? thank you for your reaction

Oct 07, 2006 1 Replies

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Gootes 19 years ago

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ppanbura 19 years ago

Hello,

I am not sure this will work for you or not. Remove the "uart.h" in your source file and use the 0 instead of UART0 for the parameter indicating which uart to use. This parameter is needed for uart2.c (which is included as an included file in your source). The uart2.c or uart2.h API supports 2 uarts on the ATmega that has 2 UARTs and therefore the library expects additional parameter for specifying which UART.

Regards,

-Pandit

Gootes wrote:

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