From 16c4f1d43c3c013fe2572025db1d789100c97821 Mon Sep 17 00:00:00 2001 From: Dean Camera <dean@fourwalledcubicle.com> Date: Mon, 4 Nov 2013 17:09:21 +0100 Subject: Increase AVRISP-MKII Clone PDI/TPI handshake to 1ms from 1us for targets with high /RESET line capacitance. --- LUFA/DoxygenPages/ChangeLog.txt | 2 ++ Projects/AVRISP-MKII/Lib/XPROG/XPROGTarget.c | 4 ++-- 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/LUFA/DoxygenPages/ChangeLog.txt b/LUFA/DoxygenPages/ChangeLog.txt index 7746be952..70cf6cb66 100644 --- a/LUFA/DoxygenPages/ChangeLog.txt +++ b/LUFA/DoxygenPages/ChangeLog.txt @@ -17,6 +17,8 @@ * - AVRISP-MKII Clone Project PDI/TPI frequency increased from 250KHz to 2MHz as it is now stable * - Fixed incorrect signature bytes returned in the DFU bootloader * - Added new libUSB host Python and NodeJS application examples for the class driver GenericHID demo (thanks to Laszlo Monda) + * - Increased TPI/PDI handshake delay to 1ms from 1us to support targets with high amounts of capacitance on their + * /RESET lines (thanks to Paul Duke) * * \section Sec_ChangeLog130901 Version 130901 * <b>New:</b> diff --git a/Projects/AVRISP-MKII/Lib/XPROG/XPROGTarget.c b/Projects/AVRISP-MKII/Lib/XPROG/XPROGTarget.c index 5f48089e4..165c76903 100644 --- a/Projects/AVRISP-MKII/Lib/XPROG/XPROGTarget.c +++ b/Projects/AVRISP-MKII/Lib/XPROG/XPROGTarget.c @@ -52,7 +52,7 @@ void XPROGTarget_EnableTargetPDI(void) /* Set DATA line high for at least 90ns to disable /RESET functionality */ PORTD |= (1 << 3); - _delay_us(1); + _delay_ms(1); /* Set up the synchronous USART for XMEGA communications - 8 data bits, even parity, 2 stop bits */ UBRR1 = ((F_CPU / 2 / XPROG_HARDWARE_SPEED) - 1); @@ -72,7 +72,7 @@ void XPROGTarget_EnableTargetTPI(void) /* 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(1); + _delay_ms(1); /* Set Tx and XCK as outputs, Rx as input */ DDRD |= (1 << 5) | (1 << 3); -- cgit v1.2.3