By default D0 - D3 pins are used for the bit-banged SPI com channel between mbed target and the FPGA-test-shield.
For some reason, if pins were used as GPIOs and then reconfigured to I2C pins the I2C com does not work on NRF52840.
This commit modifies i2c_configure_twi_instance() function and adds proper initialization of the I2C pins.
i2c_byte_write implementation was broken.
Data sending was inside addressing block
Changed from:
i2c_byte_write
{
if (start) {
if (read_address)
start read;
esle
start write;
write byte;
}
}
to:
i2c_byte_write
{
if (start) {
// if first call after start
// address for reading or writing
if (read_address)
start read;
esle
start write;
} else {
// send data byte
write byte;
}
}
Also addressed:
- removed dependency on legacy config (excluded apply_old_config.h)
- removed legacy pwm and saadc headers
- Arm Compiler 5 linking issue (a band-aid for now... needs to
be properly addressed for peripheral sharing)
- added missing header in SoftDevice file
- top level files ported from TARGET_NORDIC/TARGET_NRF5x/
Also addressed:
- fixed linking issue for gcc
- added support for nRF52-DK builds, but reverted to using nRF52840 sdk_config.h (must be updated)
- introduced "RTC" to targets.json (might need to be removed eventually)
The DEVICE_FOO macros are always defined (either 0 or 1).
This patch replaces any instances of a define check on a DEVICE_FOO
macro with value test instead.
Signed-off-by: Alastair D'Silva <alastair@d-silva.org>
The unified NRF51 target and feature BLE directories have been
reorganized to follow the naming and directory structure of the
NRF52 implementation.
This reorganization does not include TARGET_MCU_NRF51822 and
derived targets.
George Beckstein
Przemyslaw Stekiel
Maciej Bocianski
RFulchiero
Naveen Kaje
Russ Butler
Alastair D'Silva
Marcus Chang