[CMSIS] Add new atomic register access services
diff --git a/Include/stm32f2xx.h b/Include/stm32f2xx.h index efd3f25..57c5a08 100644 --- a/Include/stm32f2xx.h +++ b/Include/stm32f2xx.h
@@ -162,6 +162,60 @@ #define POSITION_VAL(VAL) (__CLZ(__RBIT(VAL))) +/* Use of CMSIS compiler intrinsics for register exclusive access */ +/* Atomic 32-bit register access macro to set one or several bits */ +#define ATOMIC_SET_BIT(REG, BIT) \ + do { \ + uint32_t val; \ + do { \ + val = __LDREXW((__IO uint32_t *)&(REG)) | (BIT); \ + } while ((__STREXW(val,(__IO uint32_t *)&(REG))) != 0U); \ + } while(0) + +/* Atomic 32-bit register access macro to clear one or several bits */ +#define ATOMIC_CLEAR_BIT(REG, BIT) \ + do { \ + uint32_t val; \ + do { \ + val = __LDREXW((__IO uint32_t *)&(REG)) & ~(BIT); \ + } while ((__STREXW(val,(__IO uint32_t *)&(REG))) != 0U); \ + } while(0) + +/* Atomic 32-bit register access macro to clear and set one or several bits */ +#define ATOMIC_MODIFY_REG(REG, CLEARMSK, SETMASK) \ + do { \ + uint32_t val; \ + do { \ + val = (__LDREXW((__IO uint32_t *)&(REG)) & ~(CLEARMSK)) | (SETMASK); \ + } while ((__STREXW(val,(__IO uint32_t *)&(REG))) != 0U); \ + } while(0) + +/* Atomic 16-bit register access macro to set one or several bits */ +#define ATOMIC_SETH_BIT(REG, BIT) \ + do { \ + uint16_t val; \ + do { \ + val = __LDREXH((__IO uint16_t *)&(REG)) | (BIT); \ + } while ((__STREXH(val,(__IO uint16_t *)&(REG))) != 0U); \ + } while(0) + +/* Atomic 16-bit register access macro to clear one or several bits */ +#define ATOMIC_CLEARH_BIT(REG, BIT) \ + do { \ + uint16_t val; \ + do { \ + val = __LDREXH((__IO uint16_t *)&(REG)) & ~(BIT); \ + } while ((__STREXH(val,(__IO uint16_t *)&(REG))) != 0U); \ + } while(0) + +/* Atomic 16-bit register access macro to clear and set one or several bits */ +#define ATOMIC_MODIFYH_REG(REG, CLEARMSK, SETMASK) \ + do { \ + uint16_t val; \ + do { \ + val = (__LDREXH((__IO uint16_t *)&(REG)) & ~(CLEARMSK)) | (SETMASK); \ + } while ((__STREXH(val,(__IO uint16_t *)&(REG))) != 0U); \ + } while(0) /** * @}