From 24ca2d49fef526b95e6efcd3cdcbe38377ae4f02 Mon Sep 17 00:00:00 2001 From: Dean Camera Date: Tue, 29 Nov 2011 11:30:25 +0000 Subject: [PATCH] Bit-bang ISP in the AVRISP-MKII clone project needs to set MOSI pin to the MSB of the data byte on startup, not the LSB. --- Projects/AVRISP-MKII/Lib/ISP/ISPTarget.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/Projects/AVRISP-MKII/Lib/ISP/ISPTarget.c b/Projects/AVRISP-MKII/Lib/ISP/ISPTarget.c index 2158f4de2d..a6ec536008 100644 --- a/Projects/AVRISP-MKII/Lib/ISP/ISPTarget.c +++ b/Projects/AVRISP-MKII/Lib/ISP/ISPTarget.c @@ -243,7 +243,8 @@ uint8_t ISPTarget_TransferSoftSPIByte(const uint8_t Byte) SoftSPI_Data = Byte; SoftSPI_BitsRemaining = 8; - if (SoftSPI_Data & 0x01) + /* Set initial MOSI pin state according to the byte to be transferred */ + if (SoftSPI_Data & (1 << 7)) PORTB |= (1 << 2); else PORTB &= ~(1 << 2);