CMake: Add acceleration sensor configuration

The DRIVER_ACC configuration variable can be used to select the
acceleration sensor driver to be used.

doc/buildAndProgram.md

@@ -35,7 +35,7 @@ CMake configures the project according to variables you specify the command line
 **GDB_CLIENT_BIN_PATH**|Path to arm-none-eabi-gdb executable. Used only if `USE_GDB_CLIENT` is 1.|`-DGDB_CLIENT_BIN_PATH=/home/jf/nrf52/gcc-arm-none-eabi-9-2019-q4-major/bin/arm-none-eabi-gdb`
 **GDB_CLIENT_TARGET_REMOTE**|Target remote connection string. Used only if `USE_GDB_CLIENT` is 1.|`-DGDB_CLIENT_TARGET_REMOTE=/dev/ttyACM0`
 **BUILD_DFU (\*\*)**|Build DFU files while building (needs [adafruit-nrfutil](https://github.com/adafruit/Adafruit_nRF52_nrfutil)).|`-DBUILD_DFU=1`
-**TARGET_DEVICE**|Target device, used for the pin map and the low frequency clock source. Allowed: `PINETIME, P8A, P8B`|`-DTARGET_DEVICE=PINETIME` (Default)
+**TARGET_DEVICE**|Target device, used for the pin map, the low frequency clock source, and the acceleration driver selection. Allowed: `PINETIME, P8A, P8B`|`-DTARGET_DEVICE=PINETIME` (Default)
 
 ####(**) Note about **CMAKE_BUILD_TYPE**:
 By default, this variable is set to *Release*. It compiles the code with size and speed optimizations. We use this value for all the binaries we publish when we [release](https://github.com/InfiniTimeOrg/InfiniTime/releases) new versions of InfiniTime.

src/CMakeLists.txt

@@ -810,12 +810,15 @@ add_definitions(-D__HEAP_SIZE=4096)
 add_definitions(-DTARGET_DEVICE_${TARGET_DEVICE})
 if(TARGET_DEVICE STREQUAL "PINETIME")
   add_definitions(-DCLOCK_CONFIG_LF_SRC=1) # XTAL
+  add_definitions(-DDRIVER_ACC_BMA421)
 elseif(TARGET_DEVICE STREQUAL "P8A")
   add_definitions(-DCLOCK_CONFIG_LF_SRC=1) # XTAL
+  add_definitions(-DDRIVER_ACC_BMA421)
 elseif(TARGET_DEVICE STREQUAL "P8B")
   add_definitions(-DCLOCK_CONFIG_LF_SRC=0) # RC
   add_definitions(-DMYNEWT_VAL_BLE_LL_SCA=500)
   add_definitions(-DCLOCK_CONFIG_LF_CAL_ENABLED=1)
+  add_definitions(-DDRIVER_ACC_SC7A20)
 else()
   message(FATAL_ERROR "Invalid TARGET_DEVICE")
 endif()

src/main.cpp

@@ -90,13 +90,11 @@ Pinetime::Drivers::Cst816S touchPanel {twiMaster, touchPanelTwiAddress};
 Pinetime::Components::LittleVgl lvgl {lcd, touchPanel};
 
 #if (defined DRIVER_ACC_SC7A20)
-#include <drivers/SC7A20.h>
-  static constexpr uint8_t motionSensorTwiAddress = 0x18;
+  #include <drivers/SC7A20.h>
+static constexpr uint8_t motionSensorTwiAddress = 0x18;
 Pinetime::Drivers::SC7A20 motionSensor {twiMaster, motionSensorTwiAddress};
 #else
-// Assume DRIVER_ACC_BMA421,
-// this is needed for the LVGL simulator,
-// which does not set any target hardware configuration variables
+// Assume PineTime (DRIVER_ACC_BMA421)
   #include <drivers/Bma421.h>
 static constexpr uint8_t motionSensorTwiAddress = 0x18;
 Pinetime::Drivers::Bma421 motionSensor {twiMaster, motionSensorTwiAddress};