Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
spi_software: Use actual rate for software SPI bus for prevent incorrect work of HD44780 display
For old displays based on shift-registered HD44780 user can faced with "empty screen" issue or chaotic chars on display. Root cause is using hardware delay for SPI bus based on actual MCU performance. For new chips like STM32 delay between commands is too short (couple nano-seconds) and display cannot be initialised properly.
Solution: use actual rate from command and setup properly frequency for CLC pin and correct delay for CS.
Signed-off-by: Aleksandr Shaduro a.shaduro@outlook.com