From e615baef88315c078baf3007e7cc6bf8ae316509 Mon Sep 17 00:00:00 2001
From: schneider <schneider@blinkenlichts.net>
Date: Mon, 22 Jul 2019 19:07:30 +0200
Subject: [PATCH] fix(display): Reduce SPI frequency to increase stability
---
lib/card10/card10.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/lib/card10/card10.c b/lib/card10/card10.c
index 8f9587d2..eaedb136 100644
--- a/lib/card10/card10.c
+++ b/lib/card10/card10.c
@@ -24,7 +24,11 @@
#include <stdint.h>
#include <string.h>
-#define SPI_SPEED (15 * 1000 * 1000 * 1) // Bit Rate. Display has 15 MHz limit
+/* XXX: The display supports max 15 Mhz, but we have stability issues at that rate.
+ * Current suspicion is that the SDK is buggy.
+ *
+ * At 12 MHz things seem stable*/
+#define SPI_SPEED (12 * 1000 * 1000) // Bit Rate. Display has 15 MHz limit
const gpio_cfg_t bhi_interrupt_pin = {PORT_0, PIN_13, GPIO_FUNC_IN, GPIO_PAD_PULL_UP};
--
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