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jnk0le / AVR-UART-lib

extremly light uart library for AVR 8 bit microcontrollers
MIT License
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error: expected ‘;’, ‘,’ or ‘)’ before ‘char’ #6

Closed PaulMaxAvalosAguilar closed 5 years ago

PaulMaxAvalosAguilar commented 6 years ago

make[1]: Entering directory '/home/paul/Cprojects/Production/Encoder2/MicrocontrollerCode/AVR/Src_Modules/MicroC_Application'

avr-gcc -Wall -Os -DF_CPU=8000000 -mmcu=atmega328p -std=c11 -Wall -D RELEASE -c src/example.c -o ../../Objects/ReleaseAvrStatic/example.o
In file included from src/example.c:8:0: src/usart.h:1593:27: warning: type defaults to ‘int’ in declaration of ‘flash’ void uart0_puts_p(const flash char string); // send string from flash memory ^ src/usart.h:1593:35: error: expected ‘;’, ‘,’ or ‘)’ before ‘char’ void uart0_puts_p(const __flash char string); // send string from flash memory ^ src/example.c:12:6: warning: return type of ‘main’ is not ‘int’ [-Wmain] void main(void) ^ src/example.c: In function ‘main’: src/example.c:24:2: warning: implicit declaration of function ‘uart0_puts_p’ [-Wimplicit-function-declaration] uart_puts_P("hello from flashed, usart\r\n"); // write string to usart buffer from flash memory // string is parsed by PSTR() macro ^ Makefile:25: recipe for target '../../Objects/ReleaseAvrStatic/example.o' failed make[1]: [../../Objects/ReleaseAvrStatic/example.o] Error 1 make[1]: Leaving directory '/home/paul/Cprojects/Production/Encoder2/MicrocontrollerCode/AVR/Src_Modules/MicroC_Application' Makefile:28: recipe for target 'Application' failed make: [Application] Error 2

I think it is self explicative

jnk0le commented 6 years ago

void main() is now fixed and the rest of the errors are related to __flash specifier that is supported by avr-gcc since 4.7 version.

jnk0le commented 6 years ago

the problem with __flash specifier might also be the lack of suport in g++. https://www.avrfreaks.net/forum/avr-g-lacks-flash

hdelatorre21 commented 5 years ago

Hi, I am trying to use this library in Atmel Studio 7 but it seems that the attribute __flash is not compatible with it, I was using the test program that comes whit the library and this two errors below was the only thing that prevent the program to compile, I am quite new to programming in C, so maybe it's an easy problem to solve, any help or advice you can give me so I can use this library in Atmel Studio 7 would be very well received.

The two erros occur in each of the next functions void uart1_puts_p(const flash char *string); // send string from flash memory
void uart2_puts_p(const flash char string); // send string from flash memory void uart3_puts_p(const __flash char string); // send string from flash memory

Errors:

Severity Code Description Project File Line Error '__flash' does not name a type UART_lib_TEST C:\Users\De la Torre\Documents\Atmel Studio\C Programming\Programas AVR\UART_lib_TEST\UART_lib_TEST\usart.h 1675

Severity Code Description Project File Line Error expected ',' or '...' before 'char' UART_lib_TEST C:\Users\De la Torre\Documents\Atmel Studio\C Programming\Programas AVR\UART_lib_TEST\UART_lib_TEST\usart.h 1675

jnk0le commented 5 years ago

Looks like the fix only addressed uart0

hdelatorre21 commented 5 years ago

I think it's because the IDE (Atmel Studio 7) I'm using, maybe it's the same thing that used to happen with g++ until the 4.7 version as you metioned, I thought maybe there could be a easy fix to make it work in Atmel but if there's not, well I guess I'll just have to keep working.

Thankyou very much for your response.