Added new XCK_RESCUE_CLOCK_ENABLE compile time option to the AVRISP-MKII clone progra...

[pub/USBasp.git] / Projects / AVRISP-MKII / Lib / ISP / ISPTarget.c

diff --git a/Projects/AVRISP-MKII/Lib/ISP/ISPTarget.c b/Projects/AVRISP-MKII/Lib/ISP/ISPTarget.c
index 66a1c25..657c2c9 100644 (file)
--- a/Projects/AVRISP-MKII/Lib/ISP/ISPTarget.c
+++ b/Projects/AVRISP-MKII/Lib/ISP/ISPTarget.c
@@ -189,19 +189,29 @@ void ISPTarget_DisableTargetISP(void)
  */
 void ISPTarget_ConfigureRescueClock(void)
 {
-       /* Configure OCR1A as an output for the specified AVR model */
-       #if defined(USB_SERIES_2_AVR)
-       DDRC |= (1 << 6);
+       #if defined(XCK_RESCUE_CLOCK_ENABLE)
+               /* Configure XCK as an output for the specified AVR model */
+               DDRD  |= (1 << 5);
+               
+               /* Start USART to generate a 4MHz clock on the XCK pin */
+               UBRR1  = ((F_CPU / 2 / ISP_RESCUE_CLOCK_SPEED) - 1);
+               UCSR1B = (1 << TXEN1);
+               UCSR1C = (1 << UMSEL10) | (1 << UPM11) | (1 << USBS1) | (1 << UCSZ11) | (1 << UCSZ10) | (1 << UCPOL1);
        #else
-       DDRB |= (1 << 5);
+               /* Configure OCR1A as an output for the specified AVR model */
+               #if defined(USB_SERIES_2_AVR)
+               DDRC |= (1 << 6);
+               #else
+               DDRB |= (1 << 5);
+               #endif
+
+               /* Start Timer 1 to generate a 4MHz clock on the OCR1A pin */
+               TIMSK1 = 0;
+               TCNT1  = 0;
+               OCR1A  = ((F_CPU / 2 / ISP_RESCUE_CLOCK_SPEED) - 1);
+               TCCR1A = (1 << COM1A0);
+               TCCR1B = ((1 << WGM12) | (1 << CS10));
        #endif
-
-       /* Start Timer 1 to generate a 4MHz clock on the OCR1A pin */
-       TIMSK1 = 0;
-       TCNT1  = 0;
-       OCR1A  = ((F_CPU / 2 / ISP_RESCUE_CLOCK_SPEED) - 1);
-       TCCR1A = (1 << COM1A0);
-       TCCR1B = ((1 << WGM12) | (1 << CS10));
 }
 
 /** Configures the AVR's timer ready to produce software ISP for the slower ISP speeds that