Hi,
Actually I have an embedded system without keyboard in my PCB. The program is write in C and use polling for checking 8 externals periphericals but now I need to use polling only for 6 of them and so I must use external interrupt for the 2 others which are connected to ports P1.0 and P1.1 but these ports are for Keyboard Interrupt.
Can you help me please to find my way for using 2 simple externals interrupts on ports P1.0 and P1.1 instead of external Keyboard Interrupts.
My looping code is:
void micro (void) { if (!Detect_P2 && !Detect_P3 && !Detect_P4 && !Detect_P5 && !Detect_P6 && !Detect_P7 && !Detect_P8) {Mic_Mute_PA = 0x01;} else {Mic_Mute_PA = 0x00;} if (P1_0 == 0) //using it with external INTERRUPT { Unmute_PA(); //291107 pour un bon gong le faire avant d'entrer dans MicDriver_ON() mic_driver_2 ();} //Driver on else { mic_driver_off_2 (); } //Driver off if (P1_1 == 0) //using it with external INTERRUPT { Unmute_PA(); radio_on_2 ();} //RAD on else { rad_off_2 (); } //RAD off if (P3_3 == 0) {in1_on_2 ();} //IN1 on else { in1_off_2 (); } //IN1 off if (P3_4 == 0) { in2_on_2 ();} //IN2 on else { in2_off_2 (); } //IN2 off if (P3_5 == 0) {in3_on_2 ();} //IN3 on else { in3_off_2 (); } //IN3 off if (P1_2 == 0) { aux_on_2 ();} //AUX on else { aux_off_2 (); } //AUX off if (P1_3 == 0) { mic_guide_2 (); } else { mic_guide_off_2 (); } }
Thank you
my practice: NEVER check anything that can bounce in a regular interrupt, use a timer interrupt. If a regular interrupt is needed for "wake up" let that interrupt wake the chip up and do NOTHING ELSE.
re using the KBI for other purposes there are multiple potential sources of interrupt and concurrency can happen. 1) just change the match SFR only for those processed in the ISR. 2) use if .. if .. if in the ISR 3) using a switch ISR will get you to 1) 4) never use an if .. else if .. else if .. ISR.
Erik