From d6db5f7e04691f1c520554fe5d8c48f73cd88824 Mon Sep 17 00:00:00 2001
From: Eyck Jentzsch <eyck@minres.com>
Date: Fri, 5 Oct 2018 12:23:39 +0200
Subject: [PATCH] Fixed rxwm setting as it defines the maximum number of
 received bytes *before* the interrupt

---
 riscv-bldc-forced-commutation/src/io/spi.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/riscv-bldc-forced-commutation/src/io/spi.h b/riscv-bldc-forced-commutation/src/io/spi.h
index 2fbd23c..0803542 100644
--- a/riscv-bldc-forced-commutation/src/io/spi.h
+++ b/riscv-bldc-forced-commutation/src/io/spi.h
@@ -169,7 +169,7 @@ public:
     template<size_t SIZE>
     static bool transfer(std::array<uint8_t, SIZE>& bytes){
         csmode_reg().mode=2; // HOLD mode
-        rxctrl_reg().rxmark=bytes.size(); // trigger irq if 3 bytes are received;
+        rxctrl_reg().rxmark=bytes.size()-1; // trigger irq if more than 2 bytes are received;
         ie_reg().rxwm=1;
         // write data bytes
         for(size_t i=0; i<bytes.size(); ++i)