On Wed, 15 Jan 2014, Donald E Haselwood wrote:
# the bus to stall until the previous operation (the write to clear the
# flag) has completed.
#
# For example,
# void SPI2_IRQHandler(void)
# {
# volatile unsigned int dummy;
# ... some code...
# SPI2_CR2 &= ~SPI_CR2_RXNEIE; // Turn off RXE interrupt enable
# ...some code...
# dummy = SPI2_SR; // Prevent tail-chaining.
# return;
# }
Excellent tip, thanks!
We should add an ISR prologue option to the library, or even a
#define. A prologue could be auto-added by the compiler, based on some
optional keyword up front, perhaps...
Thank you everyone,
jeff
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