Merge commit '60b30c036397cb5627fa374bb930794b225daa29' as 'lib/lufa'

1 files changed, 209 insertions, 0 deletions

diff --git a/lib/lufa/Projects/AVRISP-MKII/Lib/XPROG/XPROGTarget.c b/lib/lufa/Projects/AVRISP-MKII/Lib/XPROG/XPROGTarget.c
new file mode 100644
index 000000000..0455329c3
--- /dev/null
+++ b/lib/lufa/Projects/AVRISP-MKII/Lib/XPROG/XPROGTarget.c
@@ -0,0 +1,209 @@
+/*
+             LUFA Library
+     Copyright (C) Dean Camera, 2017.
+
+  dean [at] fourwalledcubicle [dot] com
+           www.lufa-lib.org
+*/
+
+/*
+  Copyright 2017  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
+  without fee, provided that the above copyright notice appear in
+  all copies and that both that the copyright notice and this
+  permission notice and warranty disclaimer appear in supporting
+  documentation, and that the name of the author not be used in
+  advertising or publicity pertaining to distribution of the
+  software without specific, written prior permission.
+
+  The author disclaims all warranties with regard to this
+  software, including all implied warranties of merchantability
+  and fitness.  In no event shall the author be liable for any
+  special, indirect or consequential damages or any damages
+  whatsoever resulting from loss of use, data or profits, whether
+  in an action of contract, negligence or other tortious action,
+  arising out of or in connection with the use or performance of
+  this software.
+*/
+
+/** \file
+ *
+ *  Target-related functions for the PDI Protocol decoder.
+ */
+
+#define  INCLUDE_FROM_XPROGTARGET_C
+#include "XPROGTarget.h"
+
+#if defined(ENABLE_XPROG_PROTOCOL) || defined(__DOXYGEN__)
+
+/** Flag to indicate if the USART is currently in Tx or Rx mode. */
+bool IsSending;
+
+/** Enables the target's PDI interface, holding the target in reset until PDI mode is exited. */
+void XPROGTarget_EnableTargetPDI(void)
+{
+	IsSending = false;
+
+	/* Set Tx and XCK as outputs, Rx as input */
+	DDRD |=  (1 << 5) | (1 << 3);
+	DDRD &= ~(1 << 2);
+
+	/* Set DATA line high for at least 90ns to disable /RESET functionality */
+	PORTD |= (1 << 3);
+	_delay_us(100);
+
+	/* 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);
+	UCSR1C = (1 << UMSEL10) | (1 << UPM11) | (1 << USBS1) | (1 << UCSZ11) | (1 << UCSZ10) | (1 << UCPOL1);
+
+	/* Send two IDLEs of 12 bits each to enable PDI interface (need at least 16 idle bits) */
+	XPROGTarget_SendIdle();
+	XPROGTarget_SendIdle();
+}
+
+/** Enables the target's TPI interface, holding the target in reset until TPI mode is exited. */
+void XPROGTarget_EnableTargetTPI(void)
+{
+	IsSending = false;
+
+	/* Set /RESET line low for at least 400ns to enable TPI functionality */
+	AUX_LINE_DDR  |=  AUX_LINE_MASK;
+	AUX_LINE_PORT &= ~AUX_LINE_MASK;
+	_delay_us(100);
+
+	/* Set Tx and XCK as outputs, Rx as input */
+	DDRD |=  (1 << 5) | (1 << 3);
+	DDRD &= ~(1 << 2);
+
+	/* Set up the synchronous USART for TPI communications - 8 data bits, even parity, 2 stop bits */
+	UBRR1  = ((F_CPU / 2 / XPROG_HARDWARE_SPEED) - 1);
+	UCSR1B = (1 << TXEN1);
+	UCSR1C = (1 << UMSEL10) | (1 << UPM11) | (1 << USBS1) | (1 << UCSZ11) | (1 << UCSZ10) | (1 << UCPOL1);
+
+	/* Send two IDLEs of 12 bits each to enable TPI interface (need at least 16 idle bits) */
+	XPROGTarget_SendIdle();
+	XPROGTarget_SendIdle();
+}
+
+/** Disables the target's PDI interface, exits programming mode and starts the target's application. */
+void XPROGTarget_DisableTargetPDI(void)
+{
+	/* Switch to Rx mode to ensure that all pending transmissions are complete */
+	if (IsSending)
+	  XPROGTarget_SetRxMode();
+
+	/* Turn off receiver and transmitter of the USART, clear settings */
+	UCSR1A  = ((1 << TXC1) | (1 << RXC1));
+	UCSR1B  = 0;
+	UCSR1C  = 0;
+
+	/* Tristate all pins */
+	DDRD  &= ~((1 << 5) | (1 << 3));
+	PORTD &= ~((1 << 5) | (1 << 3) | (1 << 2));
+}
+
+/** Disables the target's TPI interface, exits programming mode and starts the target's application. */
+void XPROGTarget_DisableTargetTPI(void)
+{
+	/* Switch to Rx mode to ensure that all pending transmissions are complete */
+	if (IsSending)
+	  XPROGTarget_SetRxMode();
+
+	/* Turn off receiver and transmitter of the USART, clear settings */
+	UCSR1A |= (1 << TXC1) | (1 << RXC1);
+	UCSR1B  = 0;
+	UCSR1C  = 0;
+
+	/* Set all USART lines as inputs, tristate */
+	DDRD  &= ~((1 << 5) | (1 << 3));
+	PORTD &= ~((1 << 5) | (1 << 3) | (1 << 2));
+
+	/* Tristate target /RESET line */
+	AUX_LINE_DDR  &= ~AUX_LINE_MASK;
+	AUX_LINE_PORT &= ~AUX_LINE_MASK;
+}
+
+/** Sends a byte via the USART.
+ *
+ *  \param[in] Byte  Byte to send through the USART
+ */
+void XPROGTarget_SendByte(const uint8_t Byte)
+{
+	/* Switch to Tx mode if currently in Rx mode */
+	if (!(IsSending))
+	  XPROGTarget_SetTxMode();
+
+	/* Wait until there is space in the hardware Tx buffer before writing */
+	while (!(UCSR1A & (1 << UDRE1)));
+	UCSR1A |= (1 << TXC1);
+	UDR1    = Byte;
+}
+
+/** Receives a byte via the hardware USART, blocking until data is received or timeout expired.
+ *
+ *  \return Received byte from the USART
+ */
+uint8_t XPROGTarget_ReceiveByte(void)
+{
+	/* Switch to Rx mode if currently in Tx mode */
+	if (IsSending)
+	  XPROGTarget_SetRxMode();
+
+	/* Wait until a byte has been received before reading */
+	while (!(UCSR1A & (1 << RXC1)) && TimeoutTicksRemaining);
+
+	return UDR1;
+}
+
+/** Sends an IDLE via the USART to the attached target, consisting of a full frame of idle bits. */
+void XPROGTarget_SendIdle(void)
+{
+	/* Switch to Tx mode if currently in Rx mode */
+	if (!(IsSending))
+	  XPROGTarget_SetTxMode();
+
+	/* Need to do nothing for a full frame to send an IDLE */
+	for (uint8_t i = 0; i < BITS_IN_USART_FRAME; i++)
+	{
+		/* Wait for a full cycle of the clock */
+		while (PIND & (1 << 5));
+		while (!(PIND & (1 << 5)));
+		while (PIND & (1 << 5));
+	}
+}
+
+static void XPROGTarget_SetTxMode(void)
+{
+	/* Wait for a full cycle of the clock */
+	while (PIND & (1 << 5));
+	while (!(PIND & (1 << 5)));
+	while (PIND & (1 << 5));
+
+	PORTD  |=  (1 << 3);
+	DDRD   |=  (1 << 3);
+
+	UCSR1B &= ~(1 << RXEN1);
+	UCSR1B |=  (1 << TXEN1);
+
+	IsSending = true;
+}
+
+static void XPROGTarget_SetRxMode(void)
+{
+	while (!(UCSR1A & (1 << TXC1)));
+	UCSR1A |=  (1 << TXC1);
+
+	UCSR1B &= ~(1 << TXEN1);
+	UCSR1B |=  (1 << RXEN1);
+
+	DDRD   &= ~(1 << 3);
+	PORTD  &= ~(1 << 3);
+
+	IsSending = false;
+}
+
+#endif
+