greetings,
write character device driver i2s/pcm port on pi3. running 4.4.35-v7+ kernel i've cross-compiled using x86 lubuntu vmware vm on laptop.
aware there device driver i2s port, however, think there work alsa sub-system. cannot find device major , minor numbers access plain character device. not interested in using i2s port in conjunction alsa.
have written user-mode polled programme control i2s port, cannot keep data rate wish use. need write interrupt driven character driver - should able keep up.
having difficulty working out need allocate correct interrupt , assign interrupt handler it.
looking @ blog described interrupt driven character device driver gpio, however, 3.6 version of kernel running on pi1, , gave method allocating gpio interrupt. kernel header files seem lot different now.
can out there point me in right direction?
andrew.
write character device driver i2s/pcm port on pi3. running 4.4.35-v7+ kernel i've cross-compiled using x86 lubuntu vmware vm on laptop.
aware there device driver i2s port, however, think there work alsa sub-system. cannot find device major , minor numbers access plain character device. not interested in using i2s port in conjunction alsa.
have written user-mode polled programme control i2s port, cannot keep data rate wish use. need write interrupt driven character driver - should able keep up.
having difficulty working out need allocate correct interrupt , assign interrupt handler it.
looking @ blog described interrupt driven character device driver gpio, however, 3.6 version of kernel running on pi1, , gave method allocating gpio interrupt. kernel header files seem lot different now.
can out there point me in right direction?
andrew.
raspberrypi
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