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add comments to register read/write operations

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Jack 2016-09-06 20:21:47 +08:00 committed by Wu Jian Gang
parent 04b53643ef
commit d0442602c7
1 changed files with 46 additions and 11 deletions
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57
components/esp32/include/soc/soc.h
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@ -58,35 +58,70 @@
#define BIT(nr) (1UL << (nr))
//write value to register
#define REG_WRITE(_r, _v) (*(volatile uint32_t *)(_r)) = (_v)
//read value from register
#define REG_READ(_r) (*(volatile uint32_t *)(_r))
//get bit or get bits
//get bit or get bits from register
#define REG_GET_BIT(_r, _b) (*(volatile uint32_t*)(_r) & (_b))
//set bit or set bits
//set bit or set bits to register
#define REG_SET_BIT(_r, _b) (*(volatile uint32_t*)(_r) |= (_b))
//clear bit or clear bits
//clear bit or clear bits of register
#define REG_CLR_BIT(_r, _b) (*(volatile uint32_t*)(_r) &= ~(_b))
//set bits controll by mask
//set bits of register controlled by mask
#define REG_SET_BITS(_r, _b, _m) (*(volatile uint32_t*)(_r) = (*(volatile uint32_t*)(_r) & ~(_m)) | ((_b) & (_m)))
#define VALUE_GET_FIELD(_r, _f) (((_r) >> (_f##_S)) & (_f))
#define VALUE_GET_FIELD2(_r, _f) (((_r) & (_f))>> (_f##_S))
#define VALUE_SET_FIELD(_r, _f, _v) ((_r)=(((_r) & ~((_f) << (_f##_S)))|((_v)<<(_f##_S))))
#define VALUE_SET_FIELD2(_r, _f, _v) ((_r)=(((_r) & ~(_f))|((_v)<<(_f##_S))))
#define FIELD_TO_VALUE(_f, _v) (((_v)&(_f))<<_f##_S)
#define FIELD_TO_VALUE2(_f, _v) (((_v)<<_f##_S) & (_f))
//get field from register, used when _f is not left shifted by _f##_S
#define REG_GET_FIELD(_r, _f) ((REG_READ(_r) >> (_f##_S)) & (_f))
//set field to register, used when _f is not left shifted by _f##_S
#define REG_SET_FIELD(_r, _f, _v) (REG_WRITE((_r),((REG_READ(_r) & ~((_f) << (_f##_S)))|(((_v) & (_f))<<(_f##_S)))))
//get field value from a variable, used when _f is not left shifted by _f##_S
#define VALUE_GET_FIELD(_r, _f) (((_r) >> (_f##_S)) & (_f))
//get field value from a variable, used when _f is left shifted by _f##_S
#define VALUE_GET_FIELD2(_r, _f) (((_r) & (_f))>> (_f##_S))
//set field value to a variable, used when _f is not left shifted by _f##_S
#define VALUE_SET_FIELD(_r, _f, _v) ((_r)=(((_r) & ~((_f) << (_f##_S)))|((_v)<<(_f##_S))))
//set field value to a variable, used when _f is left shifted by _f##_S
#define VALUE_SET_FIELD2(_r, _f, _v) ((_r)=(((_r) & ~(_f))|((_v)<<(_f##_S))))
//generate a value from a field value, used when _f is not left shifted by _f##_S
#define FIELD_TO_VALUE(_f, _v) (((_v)&(_f))<<_f##_S)
//generate a value from a field value, used when _f is left shifted by _f##_S
#define FIELD_TO_VALUE2(_f, _v) (((_v)<<_f##_S) & (_f))
//read value from register
#define READ_PERI_REG(addr) (*((volatile uint32_t *)ETS_UNCACHED_ADDR(addr)))
//write value to register
#define WRITE_PERI_REG(addr, val) (*((volatile uint32_t *)ETS_UNCACHED_ADDR(addr))) = (uint32_t)(val)
//clear bits of register controlled by mask
#define CLEAR_PERI_REG_MASK(reg, mask) WRITE_PERI_REG((reg), (READ_PERI_REG(reg)&(~(mask))))
//set bits of register controlled by mask
#define SET_PERI_REG_MASK(reg, mask) WRITE_PERI_REG((reg), (READ_PERI_REG(reg)|(mask)))
//get bits of register controlled by mask
#define GET_PERI_REG_MASK(reg, mask) (READ_PERI_REG(reg) & (mask))
#define GET_PERI_REG_BITS(reg, hipos,lowpos) ((READ_PERI_REG(reg)>>(lowpos))&((1<<((hipos)-(lowpos)+1))-1))
//get bits of register controlled by highest bit and lowest bit
#define GET_PERI_REG_BITS(reg, hipos,lowpos) ((READ_PERI_REG(reg)>>(lowpos))&((1<<((hipos)-(lowpos)+1))-1))
//set bits of register controlled by mask and shift
#define SET_PERI_REG_BITS(reg,bit_map,value,shift) (WRITE_PERI_REG((reg),(READ_PERI_REG(reg)&(~((bit_map)<<(shift))))|(((value) & bit_map)<<(shift)) ))
//get field of register
#define GET_PERI_REG_BITS2(reg, mask,shift) ((READ_PERI_REG(reg)>>(shift))&(mask))
//}}