From 8170f5944036cc2388ed0fc221afe9378f7541f8 Mon Sep 17 00:00:00 2001
From: sago35 <sago35@gmail.com>
Date: Wed, 16 Sep 2020 18:14:10 +0900
Subject: [PATCH] atsamd5x: fix BAUD value

---
 src/machine/machine_atsamd51.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/machine/machine_atsamd51.go b/src/machine/machine_atsamd51.go
index 049ec61e..34b03132 100644
--- a/src/machine/machine_atsamd51.go
+++ b/src/machine/machine_atsamd51.go
@@ -1417,6 +1417,9 @@ func (spi SPI) Configure(config SPIConfig) error {
 
 	// Set synch speed for SPI
 	baudRate := SERCOM_FREQ_REF / (2 * config.Frequency)
+	if baudRate > 0 {
+		baudRate--
+	}
 	spi.Bus.BAUD.Set(uint8(baudRate))
 
 	// Enable SPI port.