Cypress Cordio Driver Update

[MukundGitHub]

Description

This change applies to only to the HCI driver for Cypress WiFi+BT (4343W and 43012) combo chipsets.

The Cypress Specific HCI Cordio Driver has been updated to add:

1. MCU and BT device low-power support
2. HCI UART enhanced to work at 3M baud rate for improved BT performance. In order to put the UART interface at 3M baud rate the state machine for initialization has been modified
3. Updated BT device-wake pin drive mode from input to output mode to be able wake up the BT device from low-power state when needed
4. Added delays to BT device wake de-assert function to ensure that UART data is drained

These changes are inter-connected and hence being merged together.
Test: mbed-os-example-ble-LED application and mbed-os-example-ble-Beacon application have been tested with the changes. The applications run as expected.

Pull request type

[ ] Fix
[ ] Refactor
[ x] Target update
[ ] Functionality change
[ ] Docs update
[ ] Test update
[ ] Breaking change

Reviewers

Release Notes

[ciarmcom]

@MukundGitHub, thank you for your changes.
@ARMmbed/mbed-os-pan @ARMmbed/mbed-os-maintainers please review.

[0xc0170]

Cypress Cordio Driver Update - please extend the commit msg

What update is this about. I see Pull output change here, handling sleep, adding delay to deassert and update baudrate

Looks like multiple things changed in one commit.

[MukundGitHub]

Updated the Merge comment as requested. The changes are inter-connected - with enabling of 3M baud and logic for enabling Cypress BT Chip to enter Low Power state. The MCU Device Wake Pin is configured properly and some delays added when de-asserting the Device Wake Pin to BT Chip.

[MukundGitHub]

Added capability to have BT Cordio stack working on Cypress BT chips without BT Device Wake and Host Wake Pins configured.
The changes are inter-related and hence being combined in single MR.

[0xc0170]

@MukundGitHub Can you add this to the first commit:

Updated the Merge comment as requested. The changes are inter-connected - with enabling of 3M baud and logic for enabling Cypress BT Chip to enter Low Power state. The MCU Device Wake Pin is configured properly and some delays added when de-asserting the Device Wake Pin to BT Chip.

It would be nice to have there some background. Otherwise it looks good to me!

[0xc0170]

I don't see the requested change in the commit message, please let us know once done

[MukundGitHub]

Updated the Description with details. Please accept the PR and Merge the changes.

[0xc0170]

CI started

[0xc0170]

Note to myself: include description in the merge commit when integrating

[mbed-ci]

Test run: SUCCESS

Summary: 11 of 11 test jobs passed
Build number : 1
Build artifacts