From 8b0559c4812d74b6307757135622975523c5a88d Mon Sep 17 00:00:00 2001
From: Christoph Honal <christoph.honal@web.de>
Date: Tue, 10 May 2022 21:46:36 +0200
Subject: Add basic hardware configuration options for P8

This enables the configuration of the LFCLK source,
as well as the target hardware board pin configuration.
---
 src/CMakeLists.txt   | 29 +++++++++++++++++++++++++++++
 src/drivers/PinMap.h |  4 ++--
 src/main.cpp         | 14 ++++++++++++++
 3 files changed, 45 insertions(+), 2 deletions(-)

(limited to 'src')

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index db0612ff..3b7503fd 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -779,6 +779,35 @@ add_definitions(-DFREERTOS)
 add_definitions(-D__STACK_SIZE=1024)
 add_definitions(-D__HEAP_SIZE=4096)
 
+# Note: Only use this for debugging
+# Derive the low frequency clock from the main clock (SYNT)
+# add_definitions(-DCLOCK_CONFIG_LF_SRC=2)
+
+# Target hardware configuration options
+add_definitions(-DTARGET_DEVICE_${TARGET_DEVICE})
+if(TARGET_DEVICE STREQUAL "PINETIME")
+  add_definitions(-DDRIVER_PINMAP_PINETIME)
+  add_definitions(-DCLOCK_CONFIG_LF_SRC=1) # XTAL
+elseif(TARGET_DEVICE STREQUAL "MOY-TFK5") # P8a
+  add_definitions(-DDRIVER_PINMAP_P8)
+  add_definitions(-DCLOCK_CONFIG_LF_SRC=1) # XTAL
+elseif(TARGET_DEVICE STREQUAL "MOY-TIN5") # P8a variant 2
+  add_definitions(-DDRIVER_PINMAP_P8)
+  add_definitions(-DCLOCK_CONFIG_LF_SRC=1) # XTAL
+elseif(TARGET_DEVICE STREQUAL "MOY-TON5") # P8b
+  add_definitions(-DDRIVER_PINMAP_P8)
+  add_definitions(-DCLOCK_CONFIG_LF_SRC=0) # RC
+  add_definitions(-DMYNEWT_VAL_BLE_LL_SCA=500)
+  add_definitions(-DCLOCK_CONFIG_LF_CAL_ENABLED=1)
+elseif(TARGET_DEVICE STREQUAL "MOY-UNK") # P8b mirrored
+  add_definitions(-DDRIVER_PINMAP_P8)
+  add_definitions(-DCLOCK_CONFIG_LF_SRC=0) # RC
+  add_definitions(-DMYNEWT_VAL_BLE_LL_SCA=500)
+  add_definitions(-DCLOCK_CONFIG_LF_CAL_ENABLED=1)
+else()
+  message(FATAL_ERROR "Invalid TARGET_DEVICE")
+endif()
+
 # Debug configuration
 if (${CMAKE_BUILD_TYPE} STREQUAL "Debug")
   add_definitions(-DDEBUG)
diff --git a/src/drivers/PinMap.h b/src/drivers/PinMap.h
index 833c6477..a70cfc41 100644
--- a/src/drivers/PinMap.h
+++ b/src/drivers/PinMap.h
@@ -4,8 +4,8 @@
 namespace Pinetime {
   namespace PinMap {
 
-#ifdef WATCH_P8
-    // COLMI P8
+#if defined(DRIVER_PINMAP_P8)
+    // COLMI P8 and variants
     static constexpr uint8_t Charging = 19;
     static constexpr uint8_t Cst816sReset = 13;
     static constexpr uint8_t Button = 17;
diff --git a/src/main.cpp b/src/main.cpp
index 3d70af49..98d8cafb 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -300,10 +300,24 @@ void nimble_port_ll_task_func(void* args) {
 }
 }
 
+void calibrate_lf_clock_rc(nrf_drv_clock_evt_type_t event) {
+  // 16 * 0.25s = 4s calibration cycle
+  // Not recursive, call is deferred via internal calibration timer
+  nrf_drv_clock_calibration_start(16, calibrate_lf_clock_rc);
+}
+
 int main(void) {
   logger.Init();
 
   nrf_drv_clock_init();
+  nrf_drv_clock_lfclk_request(NULL);
+
+// The RC source for the LF clock has to be calibrated
+#if (CLOCK_CONFIG_LF_SRC == NRF_CLOCK_LFCLK_RC)
+  while (!nrf_clock_lf_is_running()) {
+  }
+  nrf_drv_clock_calibration_start(0, calibrate_lf_clock_rc);
+#endif
 
   // Unblock i2c?
   nrf_gpio_cfg(Pinetime::PinMap::TwiScl,
-- 
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