i am using PPC 440 EP. i used mtdcr definitions available in uboot. i understand the UIC dcr registers are directly accessable. I have configured IRQ0 as interrupt by writing to the following registers=> GPIO1_TCR[8]=0 GPIO1_TSRL[16:17]=00 GPIO1_ISR1L[16:17]=01
And when thought it could a hardware issue on my board as the IRQ0 is connected to the CPLD, i tried configuring IRQ1. the state of IRQ1 is low. when i enable UIC0_ER register for IRQ1, there is no interrupt generated.but when i enable UIC0_PR for IRQ1 to be detected in positive polarity, an interrupt is generated with a bogus interrupt message. Did i understand the UIC0_PR register functionality wrong? Thank & Regards, Prathika R Stefan Roese wrote: > On Thursday 09 April 2009, prathika wrote: >> i got the interrupt handler working for SPI Receive in PPC 440 using >> install_hdlr(). >> Now i am trying to enable the External IRQ0 in my stand alone >> application. I am trying to detect the positive of the interrupt pulse, >> so i wrote corresponding bit to the UIC0_PR and UIC0_EN register and >> also calling the install_hdlr(). >> but still it detects the zero state at the IRQ0 pin and always executes >> the interrupt handler. >> when i read back the DCRs UIC0 enable and polarity registers using my >> application, the control word is fine. >> but when i read using uboot commands getdcr in command window, the >> status of both enable and polarity registers are not enabled for IRQ0. >> when i try to set the corresponding bit for IRQ0 using setdcr, it gives >> me message, "Masking bogus interrupt for 0x17" >> where am i going wrong.Some one please help. >> Thanks in advance. > > So which PPC440 variant are you using? And how did you configure the UIC > registers exactly? And is IRQ0 perhaps multiplexed with another multifunction > pin (see GPIO chapter)? > > Best regards, > Stefan > > ===================================================================== > DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel > HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany > Phone: +49-8142-66989-0 Fax: +49-8142-66989-80 Email: off...@denx.de > ===================================================================== _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot