hello
i’m trying to add beat indicator led (like for the seq)
but i don’t know how make it.
thank you
Hi,
MIDI Router is a C based application. I guess that you want to indicate the beat based on the received MIDI Clock, right?
So, just do the modifications in router.c: hook the code into the ROUTER_Rx_xxx function of the MIDI In Port which receives the MIDI Clock.
Add a counter which is incremented on each incoming MIDI clock event (evnt0 == 0xf8)
Reset this counter on each incoming MIDI clock start event (evnt0 == 0xfa) or once the counter is >= 24 (-> 24 MIDI clocks = 1 beat)
Assumed, that you connect the LED to PIC Pin RC0, you can turn the LED on with PORTCbits.RC0 = 1, and turn it off with PORTCbits.RC0=0
So, turn it on whenever the counter is 0, and turn it off whenever the counter is != 0
Best Regards, Thorsten
thank you for your answer.(waou tk himself).
after a lot of try i have succeed.
i show you the code in router.c :
void ROUTER_Rx_INT0(unsigned char ptype, unsigned char evnt0, unsigned char evnt1, unsigned char evnt2) __wparam
{
// Core MIDI IN, connected to my PC
// lock/release this routing path on SysEx streams
ROUTER_LockPathOnSysEx(PORT_INT0, ptype);
// forward data to the MIDI OUTs of all IIC slaves
if (evnt0 == 0xf8 && router_flags.EXT_CLOCK_MODE){
++ clock_counter;
}
else if (evnt0 == 0xfa){
clock_counter = 0;
MIOS_DOUT_PinSet1(3);
router_flags.EXT_CLOCK_MODE = 1;
}
else if(evnt0 == 0xfc){
clock_counter = 0;
beat_counter = 0;
router_flags.EXT_CLOCK_MODE = 0;
ROUTER_Tx_IIC0(ptype, evnt0, evnt1, evnt2);
ROUTER_Tx_IIC1(ptype, evnt0, evnt1, evnt2);
}
if (clock_counter >= 24){
clock_counter = 0;
++ beat_counter;
if(beat_counter == 4){
MIOS_DOUT_PinSet1(3);
beat_counter = 0;
}
else{
MIOS_DOUT_PinSet1(4);
}
}
if( router_flags.EXT_CLOCK_MODE ) {
ROUTER_Tx_IIC0(ptype, evnt0, evnt1, evnt2);
ROUTER_Tx_IIC1(ptype, evnt0, evnt1, evnt2);
}
}
and i have to modify midi_rxtx.asm :
#define MIDI_RXTX_LED_DELAY 3
; pin number of Rx LED
#define MIDI_RXTX_RX_LED 0x03
; pin number of Tx LED
#define MIDI_RXTX_RX_LED1 0x04
;
; ==========================================================================
;; export lables
global _MIDI_RXTX_NotifyRx
global _MIDI_RXTX_NotifyTx
global _MIDI_RXTX_Handler
; ==========================================================================
midi_rxtx_data udata
MIDI_RXTX_RX_CTR res 1
; ==========================================================================
MIDI_RXTX code
; ==========================================================================
;; --------------------------------------------------------------------------
;; FUNCTION: MIDI_RXTX_NotifyRx
;; DESCRIPTION: this function has to be called from the USER_MIDI_NotifyRx
;; hook when a MIDI event has been received to reload the RX counter
;; --------------------------------------------------------------------------
_MIDI_RXTX_NotifyRx
;; called from mios_wrapper/mios_wrapper.asm
movlw MIDI_RXTX_LED_DELAY
SET_BSR MIDI_RXTX_RX_CTR
movwf MIDI_RXTX_RX_CTR, BANKED
return
;; --------------------------------------------------------------------------
;; FUNCTION: MIDI_RXTX_NotifyTx
;; DESCRIPTION: this function has to be called from the USER_MIDI_NotifyTx
;; hook when a MIDI event will be transmitted to reload the TX counter
;; --------------------------------------------------------------------------
_MIDI_RXTX_NotifyTx
return
;; --------------------------------------------------------------------------
;; FUNCTION: MIDI_RXTX_Handler
;; DESCRIPTION: this function has to be called from the USER_SR_ServicePrpeare
;; hook, it decrements the Rx/Tx counters and sets the LEDs depending on the
;; counter values
;; --------------------------------------------------------------------------
_MIDI_RXTX_Handler
;; Decrement Rx counter if != 0
SET_BSR MIDI_RXTX_RX_CTR
movf MIDI_RXTX_RX_CTR, W, BANKED
skpz
decf MIDI_RXTX_RX_CTR, F, BANKED
;;
;; remove the code below if you don’t want to use LEDs to
;; indicate the counter state
;;
;; set the Rx LED depending on counter state
SET_BSR MIDI_RXTX_RX_CTR
movf MIDI_RXTX_RX_CTR, W, BANKED
bz _MIDI_RXTX_Handler_RxOff
rgoto _MIDI_RXTX_Handler_Rx_Cont
_MIDI_RXTX_Handler_RxOff
movlw 0x00
movwf MIOS_PARAMETER1
movlw MIDI_RXTX_RX_LED
call MIOS_DOUT_PinSet
movlw 0x00
movwf MIOS_PARAMETER1
movlw MIDI_RXTX_RX_LED1
call MIOS_DOUT_PinSet0
_MIDI_RXTX_Handler_Rx_Cont
return
END
i don’t know if it’s elegant but the led (green and red)flash with the tempo
and i’m happy
fab
Looks fine! 
Best Regards, Thorsten,.