Posted on February 02, 2016 at 21:32hi
I have problem with this function I2C_GetFlagStatus, when I call it as bellow :
I2C_GetFlagStatus(IOE_I2C, I2C_FLAG_SB)
/**************************************
FlagStatus I2C_GetFlagStatus(I2C_TypeDef* I2Cx, uint32_t I2C_FLAG)
{
FlagStatus bitstatus = RESET;
__IO uint32_t i2creg = 0, i2cxbase = 0;
/* Check the parameters */
assert_param(IS_I2C_ALL_PERIPH(I2Cx));
assert_param(IS_I2C_GET_FLAG(I2C_FLAG));
/* Get the I2Cx peripheral base address */
i2cxbase = (uint32_t)I2Cx;
/* Read flag register index */
i2creg = I2C_FLAG >> 28;
/* Get bit[23:0] of the flag */
I2C_FLAG &= FLAG_MASK;
if(i2creg != 0)
{
/* Get the I2Cx SR1 register address */
i2cxbase += 0x14;
}
else
{
/* Flag in I2Cx SR2 Register */
I2C_FLAG = (uint32_t)(I2C_FLAG >> 16);
/* Get the I2Cx SR2 register address */
i2cxbase += 0x18;
}
if(((*(__IO uint32_t *)i2cxbase) & I2C_FLAG) != (uint32_t)RESET)
{
/* I2C_FLAG is set */
bitstatus = SET;
}
else
{
/* I2C_FLAG is reset */
bitstatus = RESET;
}
/* Return the I2C_FLAG status */
return bitstatus;
}
/**************************************
the function returns set bitstatuse but when I call it as bellow:
I2C_GetFlagStatus(IOE_I2C, I2C_FLAG_ADDR)
the function returns reset bitstatuse!
I'm very confused since value of I2C_FLAG_SB is 0x10000001 and value of I2C_FLAG_ADDR is 0x10000002.
the program should be return set bitstatuse to work, how can I fix it?
#i2c #i2c_getflagstatus
