we found a bug in: "lpcopen_2_10_keil_iar_nxp_lpcxpresso_1769.zip\lpcopen\software\lpc_core\lpc_board\boards_17xx\nxp_lpcxpresso_1769\board.c" where the pin mode is not set correct for the SPI pins.
e.g. line 193:
Chip_IOCON_PinMux(LPC_IOCON, 0, 7, IOCON_MODE_INACT>>2, IOCON_FUNC2);
has to be used. In the original call the mode is not is downshifted but required for Chip_IOCON_PinMux() API call.
Attached corrected board.c file.
-Best regards, Götz-