Posted on May 01, 2016 at 17:49Hello ST team,
I like to see a critical section implementation similar to atmel avrlib ATOMIC_BLOCK implementation.
example:
ATOMIC_BLOCK(5) {
uint8_t status get_spi_device_info();
if(status == 0) return;
do_some_more_spi_communication();
}
pls refer
http://www.nongnu.org/avr-libc/user-manual/group__util__atomic.html and
http://www.mikrocontroller.net/topic/312246#new basically:
- the code should avoid blocking all interrupts
- the code must allow to use break and return
- the MCU status after the code must be the same as before the code squence
- the code should higher the baseprio based on given argument
- the code must not lower the baseprio if current cpuprio is higher than given baseprio
use cases:
- SPI device with notification signal
main thead avoids to be interrupted by pin event handler
- I2C devices
communication from main thread and ISR
- semaphore like operations
ST there is obviously a need for this and many people are implementing self brewed implementation.
Pls provide some proven code.
Regards, Adib.
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