Hi, Grygorii Strashko <grygorii.strashko@xxxxxx> writes: > On 11/12/2015 07:50 PM, Felipe Balbi wrote: >> According to TRM, debounce is measured in periods of >> the functional clock of the GPIO IP. This means that > > > What TRM? link pls. > > http://www.ti.com/lit/ug/spruhl7d/spruhl7d.pdf > > 28.4.1.24 GPIO_DEBOUNCINGTIME Register (offset = 154h) [reset = 0h] > > The GPIO_DEBOUNCINGTIME register controls debouncing time (the value is > global for all ports). The debouncing cell is running with the > debouncing clock (32 kHz), this register represents the number of the > clock cycle(s) (31 s long) to be used. > > Debouncing Value in 31 microsecond steps. > Debouncing Value = (DEBOUNCETIME + 1) * 31 microseconds. DRA7xx: " 8-bit values specifying the debouncing time. It is n- periods of the muxed clock, which can come from either a true 32k oscillator/pad of from the system clock. It depends on which boot mode is selected. For more information see Chapter 32, Initialization. " -- balbi
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