[MYNEWT-390] NRF HAL GPIO was not returning 1 for hal_gpio_read when pin input was high

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: v0_9_0
• Fix Version/s: v1_0_0_beta1
• Security Level: Public (Viewable by anyone)
• Assignee: Will Sanfilippo
• Reporter: Will Sanfilippo
• Created: 21/Sep/16 18:46
• Updated: 10/Nov/16 19:32
• Resolved: 22/Sep/16 04:56

Description

The HAL gpio API to read an input pin should return 0 if the pin is low and 1 if the pin is high. The nrf (both 51 and 52) was returning a non-zero value if the pin was high but not 1 unless pin 0 was being read. It was returning 1 left-shifted by the pin number. This API should return only 0 or 1 (not zero and non-zero).