Hello,
> Am 18.07.2017 um 16:59 schrieb Daniel Drotos:
>>
>> Hi,
>>
>> I'm using sdcc-stm8 with following code:
>>
>> struct FLASH_t { ... ; volatile uint8_t iapsr; ...};
>> #define FLASH ((struct FLASH_t *)BASE_ADDRESS_OF_FLASH_CONTROLLER)
>>
>> Program waits end of flash operation in a busy loop:
>>
>> while ((FLASH->iapsr & 5) == 0) ...;
>>
>> it works well rereading value of iapsr in every check. But in following
>> structure:
>>
>> uint8_t r= FLASH->iapsr;
>> while ((r & 5) == 0)
>> r= FLASH->iapsr;
>>
>> iapsr is read just once and the cycle uses that value without rereading
>> the register.
>
> As it should. FLASH->iapsr is read one, the result assinged to r. The
> while only depends on r, not FLASH->iapsr
I don't think so. It should read FLASH->iapsr into r on every loop and
reevaluate r.
Maarten
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