RE: TWI hanging in while (m_xfer_done == false); communicating with Arduino

LimeItLess — Mon, 24 Aug 2020 10:43:59 GMT

Got it to work, it was a issues with converting pca10056 to pca10056e. This post was extremely helpful. TLDR quoting the solution:

Right Click the project in the Project Explorer. In this case it will be named 'twi_scanner_pca10056' (or other twi pca10056 project)
Select 'Open Solution in Editor' from the menu that appears.
Change arm_fp_abi from "Hard" to "Soft"
Change arm_fpu_type from "FPv4-SP-D16" to "Soft"
Change arm_target_device_name from "nRF52840_xxAA" to "nRF52811_xxAA"
Add in any directories you might want to use to c_user_include_directories
Change in c_preprocessor_definitions:
1. BOARD_PCA10056 to your custom board
2. FLOAT_ABI_HARD to FLOAT_ABI_SOFT
3. NRF52840_XXAA to NRF52811_XXAA
Change debug_register_definition_file from "../../../../../../modules/nrfx/mdk/nrf52840.svd" to "../../../../../../modules/nrfx/mdk/nrf52811.svd"
Change linker_section_placement_macros:
1. FLASH_PH_SIZE=0x100000 to 0x30000
2. RAM_PH_SIZE=0x40000 to 0x6000
3. FLASH_SIZE=0x100000 to 0x30000
4. RAM_SIZE=0x40000 to 0x6000
Under <folder Name="None">
1. <file file_name="../../../../../../modules/nrfx/mdk/ses_startup_nrf52840.s" /> change to <file file_name="../../../../../../modules/nrfx/mdk/ses_startup_nrf52811.s" />
2. <file file_name="../../../../../../modules/nrfx/mdk/system_nrf52840.c" /> change to <file file_name="../../../../../../modules/nrfx/mdk/system_nrf52811.c" />

sdk_config.h modifcations

The reason I have included these is to use them as an example of the things you might have to change in a separate example.

In order to get things printing in the Debug Terminal

main.c modifications