Hi,
I'm still working with the latest version of RTEMS in a BBB. I was testing
gpio interrupts and I found that "rtems_gpio_bsp_disable_interrupt" is not
working fine. When this function is called, disables not just the specific
pin interrupt but all the pins interrupts. The problem is that this
function uses mmio_set which does something like:
AM335X_GPIO_IRQSTATUS_CLR_0 = AM335X_GPIO_IRQSTATUS | BIT(pin)
so that it is clearing all the enalbed bank interrupts.
I've changed mmio_set for mmio_write and it's working fine. Here's the
patch:
diff --git a/c/src/lib/libbsp/arm/beagle/gpio/bbb-gpio.c
b/c/src/lib/libbsp/arm/beagle/gpio/bbb-gpio.c
index bd26051..5990211 100644
--- a/c/src/lib/libbsp/arm/beagle/gpio/bbb-gpio.c
+++ b/c/src/lib/libbsp/arm/beagle/gpio/bbb-gpio.c
@@ -360,7 +369,7 @@ rtems_status_code rtems_gpio_bsp_disable_interrupt(
rtems_gpio_interrupt interrupt
) {
/* Clear IRQ generation for the specific pin */
- mmio_set(bbb_reg(bank, AM335X_GPIO_IRQSTATUS_CLR_0), BIT(pin));
+ mmio_write(bbb_reg(bank, AM335X_GPIO_IRQSTATUS_CLR_0), BIT(pin));
switch ( interrupt ) {
case FALLING_EDGE:
--
<http://www.tallertechnologies.com>
Federico Garcia Cruz
Software Engineer
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Córdoba, Argentina
Phone: +54 351 4217888 / +54 351 4218211
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