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HI! I'm working on 56309 prototype, but I need ADM56301 for testing... I cannot move port B HI32 as GPIO.. On 56309 only these settings are needed to have all port B pins as GPIO movep #$00ffff,x:M_HCR ; PORT B control reg movep #$00ffbf,x:M_HDDR ; PORT B DATA direction movep #$000001,x:M_HPCR ; PORT B all GPIO on 56301 only these registers should be set movep #$00ffbf,x:M_DIRH ; Host Port GPIO direct. movep #$4FFFFF,x:M_DCTR ; 56301 Host control reg When I attempt to move GPIO with usual : bchg #1,x:M_DATH ; Bport 56301 ! Dsp runs fine, but never happens over GPIO pins.. Do you know if another settings are required to move GPIO over 56301 ? Thank you in advance! Filippo ===== -- F.Tigli SCPOP author --- Visit our Web site www.scpop.de --------------------------- __________________________________ |
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Enabling HI32 56301 port as GPIO ...
Started by ●January 23, 2004
Reply by ●January 26, 20042004-01-26
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--- In , Tigli Filippo <f_tigli@y...> wrote: > HI! > I'm working on 56309 prototype, but I need ADM56301 > for testing... > I cannot move port B HI32 as GPIO.. > On 56309 only these settings are needed to have all > port B pins as GPIO > > movep #$00ffff,x:M_HCR ; PORT B control reg > movep #$00ffbf,x:M_HDDR ; PORT B DATA direction > movep #$000001,x:M_HPCR ; PORT B all GPIO > > on 56301 only these registers should be set > > movep #$00ffbf,x:M_DIRH ; Host Port GPIO direct. > movep #$4FFFFF,x:M_DCTR ; 56301 Host control reg > > When I attempt to move GPIO with usual : > > bchg #1,x:M_DATH ; Bport 56301 ! > > Dsp runs fine, but never happens over GPIO pins.. > > Do you know if another settings are required to move > GPIO over 56301 ? > > Thank you in advance! > > Filippo > > ===== > -- F.Tigli SCPOP author --- > > Visit our Web site > www.scpop.de > > --------------------------- Per the user manual: "The HDSM, HRWP, HTAP, HDRP, HRSP, HIRH, and HIRD bits affect the host port pins directly. To assure proper operation, these pins can be changed only when DSR[HACT] = 0. The HM[20] bits must not be changed together with these bits (that is, in the same core write). " Since these bits are 0 at reset, either leave them zero: movep #$400000,x:M_DCTR ; 56301 Host control reg Or set them to 1 then set the HM[2-0] bits: movep #$0FFFFF,x:M_DCTR ; leave HM[2-0] at zero movep #$4FFFFF,x:M_DCTR ; now change HM[2-0] to GPIO mode. The DSR[HACT] test would only be needed if you were using the HI32 in some other mode then wanted to switch to GPIO mode. Since you're probably going to GPIO mode directly from reset, it's not needed. Good luck. Robert Snyder email disconnected due to spam overload |
