From d35a54c060700e537d3e39723b7ee9b1d71b36d8 Mon Sep 17 00:00:00 2001
From: Riku Isokoski <riksu9000@gmail.com>
Date: Mon, 9 Aug 2021 21:49:35 +0300
Subject: [PATCH 1/3] Try to fix bootloop

---
 src/main.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/main.cpp b/src/main.cpp
index ffbba5e7..a18c3942 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -5,6 +5,7 @@
 #include <libraries/gpiote/app_gpiote.h>
 #include <libraries/timer/app_timer.h>
 #include <softdevice/common/nrf_sdh.h>
+#include <nrf_delay.h>
 
 // nimble
 #define min // workaround: nimble's min/max macros conflict with libstdc++
@@ -300,6 +301,14 @@ int main(void) {
 
   nrf_drv_clock_init();
 
+  // Unblock i2c?
+  nrf_gpio_cfg_output(pinTwiScl);
+  for (uint8_t i = 0; i < 16; i++) {
+    nrf_gpio_pin_toggle(pinTwiScl);
+    nrf_delay_us(5);
+  }
+  nrf_gpio_cfg_default(pinTwiScl);
+
   debounceTimer = xTimerCreate("debounceTimer", 200, pdFALSE, (void*) 0, DebounceTimerCallback);
   debounceChargeTimer = xTimerCreate("debounceTimerCharge", 200, pdFALSE, (void*) 0, DebounceTimerChargeCallback);
 

From ff81a72533e479388d49334d0ec3e0635b6e7f40 Mon Sep 17 00:00:00 2001
From: Riku Isokoski <riksu9000@gmail.com>
Date: Mon, 9 Aug 2021 22:07:06 +0300
Subject: [PATCH 2/3] Better pin configuration

---
 src/main.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/main.cpp b/src/main.cpp
index a18c3942..39d8906c 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -302,7 +302,12 @@ int main(void) {
   nrf_drv_clock_init();
 
   // Unblock i2c?
-  nrf_gpio_cfg_output(pinTwiScl);
+  nrf_gpio_cfg(pinTwiScl,
+               NRF_GPIO_PIN_DIR_OUTPUT,
+               NRF_GPIO_PIN_INPUT_DISCONNECT,
+               NRF_GPIO_PIN_NOPULL,
+               NRF_GPIO_PIN_S0D1,
+               NRF_GPIO_PIN_NOSENSE);
   for (uint8_t i = 0; i < 16; i++) {
     nrf_gpio_pin_toggle(pinTwiScl);
     nrf_delay_us(5);

From 5eb56d9a06652cb10358ecba051bbfe8ec2957a7 Mon Sep 17 00:00:00 2001
From: Riku Isokoski <riksu9000@gmail.com>
Date: Mon, 9 Aug 2021 22:11:35 +0300
Subject: [PATCH 3/3] Set pin before loop

---
 src/main.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/main.cpp b/src/main.cpp
index 39d8906c..d301be67 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -308,6 +308,7 @@ int main(void) {
                NRF_GPIO_PIN_NOPULL,
                NRF_GPIO_PIN_S0D1,
                NRF_GPIO_PIN_NOSENSE);
+  nrf_gpio_pin_set(pinTwiScl);
   for (uint8_t i = 0; i < 16; i++) {
     nrf_gpio_pin_toggle(pinTwiScl);
     nrf_delay_us(5);