From 85779e19aec5e06fd87823a28883acff189bb787 Mon Sep 17 00:00:00 2001
From: Whinis <whinis@whinis.com>
Date: Sat, 17 Apr 2021 14:17:01 -0400
Subject: [PATCH] Adds ability to set wait states in the board.h files for
 devices that use voltages below 2.7v or clocks below 48mhz

---
 inc/main.h        | 2 ++
 src/init_samd21.c | 2 +-
 src/init_samd51.c | 2 +-
 3 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/inc/main.h b/inc/main.h
index 31f23a8a..cc9b849a 100644
--- a/inc/main.h
+++ b/inc/main.h
@@ -32,7 +32,9 @@
 
 #define CPU_FREQUENCY 48000000
 
+#ifndef FLASH_WAIT_STATES //allow for other wait states 
 #define FLASH_WAIT_STATES 1
+#endif
 
 #ifndef BOOT_USART_MODULE
 #define BOOT_USART_MODULE SERCOM3
diff --git a/src/init_samd21.c b/src/init_samd21.c
index dd4ace9f..1db1c74e 100644
--- a/src/init_samd21.c
+++ b/src/init_samd21.c
@@ -26,7 +26,7 @@ static void dfll_sync(void) {
 
 void system_init(void) {
 
-  NVMCTRL->CTRLB.bit.RWS = 1;
+    NVMCTRL->CTRLB.bit.RWS = FLASH_WAIT_STATES;
 
 #if defined(CRYSTALLESS)
   /* Configure OSC8M as source for GCLK_GEN 2 */
diff --git a/src/init_samd51.c b/src/init_samd51.c
index a4525ffc..7f587f6d 100644
--- a/src/init_samd51.c
+++ b/src/init_samd51.c
@@ -5,7 +5,7 @@ uint32_t current_cpu_frequency_MHz = 48;
 
 void system_init(void) {
     // Automatic wait states.
-    NVMCTRL->CTRLA.bit.AUTOWS = 1;
+    NVMCTRL->CTRLA.bit.AUTOWS = FLASH_WAIT_STATES;
 
     // Output GCLK0 to Metro M4 D5. This way we can see if/when we mess it up.
     // PORT->Group[1].PINCFG[14].bit.PMUXEN = true;