29 lines
861 B
Diff
29 lines
861 B
Diff
From e2ff1e8bf05f0f8677e57c91b8cea78551f99413 Mon Sep 17 00:00:00 2001
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From: Piotr Dobrowolski <admin@tastycode.pl>
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Date: Mon, 25 Feb 2019 10:57:44 +0100
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Subject: [PATCH] Disable RS485 transceiver when running the bootloader
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---
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optiboot/bootloaders/optiboot/optiboot.c | 5 +++++
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1 file changed, 5 insertions(+)
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diff --git a/optiboot/bootloaders/optiboot/optiboot.c b/optiboot/bootloaders/optiboot/optiboot.c
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index 9a2c80b..2bae2a8 100644
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--- a/optiboot/bootloaders/optiboot/optiboot.c
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+++ b/optiboot/bootloaders/optiboot/optiboot.c
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@@ -690,6 +690,11 @@ int main(void) {
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#endif
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#endif
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+ /* 2019/02/24 inf - disable rs485 transceiver */
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+ PORTD &= ~_BV(3); // 0b1000;
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+ PORTD |= _BV(2); // 0b0100;
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+ DDRD |= _BV(2) | _BV(3); // 0b1100;
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+
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/* Forever loop: exits by causing WDT reset */
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for (;;) {
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/* get character from UART */
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--
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2.29.2
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