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thank you for the above, i found the problem, just for anyone who may have the same problem the solution was to change the sound's output. I removed the pc speaker (modprobe -r pcspkr) and to enable the sound pc speaker (modprobe snd-pcsp)
I am trying to trigger the buzzer on the motherboard just for a single beep.
After trying various methods on Linux console and C programming, no one succeed.
a) echo -e '\a'
b) echo -e '\07'
c) ioctl for KDMKTONE access in C
d) printf "^G"
e) linux beep program
For your information the system...
Re: read from gsm modem
i try to use interrupts but nothing new happened. i execute a AT command and read the interrupt buffer to my variable. after that i disable interrupts and send it to my mobile. The problem is that i don't get the answer of gsm modem. i get only the letter a or @
read from gsm modem
hello i have a problem with avr and gsm modem.
i can send AT commands to gsm modem but i can't get the returns. how can i read the return value of AT command???
i have the avr stk500 and i send the at command with printf("AT");
i try to read with this way
char myData[50]...
avr gsm modem
hello i am a student and i am trying to make a project with avr (mega8515) and gsm modem.
i use codevision and enable the usart transmiter. also i connect RS232 spare with portd in pins 0 and 1. then i write this code
#define CR 0x0D
.
.
main()
..
while(1) {
printf("AT+CMGD=6")...
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