Interface and Connectivity ICs
MEMS and Sensors
Analog and Audio
EMI Filtering and Signal Conditioning
Power Management and Motor Control
SPC5 Automotive MCUs
ST25 NFC/RFID Tags and Readers
Switches and Multiplexers
STM32 MCUs Community
MEMS and Sensors Community
Automotive MCUs Community
STM8 MCUs Community
Help the community
Share your activities
Contribute your knowledge
About this community
to create and rate content, and to follow, bookmark, and share content with other members.
Question asked by
on May 21, 2007
on May 17, 2011 by 18752
Show 0 Likes
No one else has this question
Mark as assumed answered
This content has been marked as final.
Show 1 comment
(Required, will not be published)
May 17, 2011 9:43 AM
my external interrupt (EXINT 4) doesn't work. I tried all resolutions dicussed before, but my system won't run.
I wor with a STR912FW44 ,a STR910FW32 and the CrossStudio IDE by Rowley.
My Code looks like this:
void init_external_irq (void)
SCU_PRR1 |= 0x20000; // Disable Reset from Port 3
SCU_PCGR1 |= 0x20000; // Clock enabling from Port 3
SCU_PRR1 |= 0x2000; // Disable Reset from WIU
SCU_PCGR1 |= 0x2000; // Clock enabling to WIU
WIU_PR = 0xfffc; // Clear all external interrupts
SCU_GPIOIN3 |= 0x38; // Configure Ports to alternative Input
WIU_MR |= 0x10; // Enable external IRQ 4
WIU_CTRL |= 0x02; // Global WIU Interrupt Enable (ext irq)
VIC1_VA9R = (unsigned int)&irq_handler_extern; // Set the address
VIC1_VC9R = 0x29; // Use slot 9 for WIU interrupt (ext irq)
VIC1_INTER |= 0x200; // Enable external IRQ (Bit 4)
Show 0 Likes
Retrieving data ...
2018 STM32 Wish List
STM32F769I-DISCO: No audio output from wm8994
STM32CubeMX V4.24.0 code generation failure (bug report)
CubeMX SDIO DMA FatFS configuration
Please provide a way to download older version of the cube.