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authorDean Camera <[email protected]>2009-12-11 04:56:52 +0000
committerDean Camera <[email protected]>2009-12-11 04:56:52 +0000
commit33a46b243a0f204f3ade095f7b213d9d2598c450 (patch)
tree9544bc254f3ed99786cccce0ee4ccf9cecd182cf /Projects/AVRISP/Lib/PDITarget.c
parent66201a05e9d5793880b27519affff7132f6630ea (diff)
downloadqmk_firmware-33a46b243a0f204f3ade095f7b213d9d2598c450.tar.gz
qmk_firmware-33a46b243a0f204f3ade095f7b213d9d2598c450.zip
PDI NVM enable is fast enough that bare polling is enough without a fixed delay in between each attempt. Make sure the USART transmitter is enabled explicitly when the USART is configured, so that repeated attempts to re-enter PDI mode don't fail due to TXEN not being set.
Diffstat (limited to 'Projects/AVRISP/Lib/PDITarget.c')
-rw-r--r--Projects/AVRISP/Lib/PDITarget.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/Projects/AVRISP/Lib/PDITarget.c b/Projects/AVRISP/Lib/PDITarget.c
index 22a4d019a4..eb16e0a28c 100644
--- a/Projects/AVRISP/Lib/PDITarget.c
+++ b/Projects/AVRISP/Lib/PDITarget.c
@@ -173,6 +173,7 @@ void PDITarget_EnableTargetPDI(void)
/* Set up the synchronous USART for XMEGA communications -
8 data bits, even parity, 2 stop bits */
UBRR1 = 10;
+ UCSR1B = (1 << TXEN1);
UCSR1C = (1 << UMSEL10) | (1 << UPM11) | (1 << USBS1) | (1 << UCSZ11) | (1 << UCSZ10) | (1 << UCPOL1);
/* Send two BREAKs of 12 bits each to enable PDI interface (need at least 16 idle bits) */
@@ -182,9 +183,10 @@ void PDITarget_EnableTargetPDI(void)
void PDITarget_DisableTargetPDI(void)
{
- /* Turn of receiver and transmitter of the USART, clear settings */
- UCSR1B = 0;
- UCSR1C = 0;
+ /* Turn off receiver and transmitter of the USART, clear settings */
+ UCSR1A |= (1 << TXC1) | (1 << RXC1);
+ UCSR1B = 0;
+ UCSR1C = 0;
/* Set all USART lines as input, tristate */
DDRD &= ~((1 << 5) | (1 << 3));