hello,
I am currently working with pwm using adc program. when I am going through header files, I am finding the below statements which I am not able to interpret. please help.
what is meaning of (3<<0)??
#define PWM_AQCTL_ZRO_BITS (3 << 0)
//! \brief Defines the location of the PRD bits in the AQCTL register
//!
#define PWM_AQCTL_PRD_BITS (3 << 2)
//! \brief Defines the location of the CAU bits in the AQCTL register
//!
#define PWM_AQCTL_CAU_BITS (3 << 4)
Hi Madhuri,
Madhuri Depuru said:I am currently working with pwm using adc program. when I am going through header files, I am finding the below statements which I am not able to interpret. please help.
what is meaning of (3<<0)??
To understand the above bit shifting operation you need to be acquainted with the ACQTLx register. Here's the same:
(3)d = (11)b
So basically we're left shifting these 2 bits to secure the location of ZRO, PRD, CAU and so on.
Hence, ZRO would be (3 << 0) means no shifting required (0011)b
For PRD its (3<<2) means 2bits left shift is required (1100)b and so on for others.... CAU (3<<4) = (110000)b etc.
Simply map this to the above register.
Regards,
Gautam
