/*
LUFA Library
- Copyright (C) Dean Camera, 2013.
+ Copyright (C) Dean Camera, 2018.
dean [at] fourwalledcubicle [dot] com
www.lufa-lib.org
*/
/*
- Copyright 2013 Dean Camera (dean [at] fourwalledcubicle [dot] com)
+ Copyright 2018 Dean Camera (dean [at] fourwalledcubicle [dot] com)
Permission to use, copy, modify, distribute, and sell this
software and its documentation for any purpose is hereby granted
#if defined(ENABLE_XPROG_PROTOCOL) || defined(__DOXYGEN__)
/** Flag to indicate if the USART is currently in Tx or Rx mode. */
-bool IsSending;
+static bool IsSending;
/** Enables the target's PDI interface, holding the target in reset until PDI mode is exited. */
void XPROGTarget_EnableTargetPDI(void)
DDRD |= (1 << 5) | (1 << 3);
DDRD &= ~(1 << 2);
- /* Set DATA line high for at least 90ns to disable /RESET functionality */
- PORTD |= (1 << 3);
+ /* Set Tx (PDI CLOCK) high, DATA line low for at least 90ns to disable /RESET functionality */
+ PORTD |= (1 << 5);
+ PORTD &= ~(1 << 3);
_delay_us(100);
+ /* Set DATA line high (enables PDI interface after 16 PDI CLK cycles) */
+ PORTD |= (1 << 3);
+ _delay_us(20);
+
/* Set up the synchronous USART for XMEGA communications - 8 data bits, even parity, 2 stop bits */
UBRR1 = ((F_CPU / 2 / XPROG_HARDWARE_SPEED) - 1);
UCSR1B = (1 << TXEN1);