tinygo-org/tinygo
1
0
Fork 0
mirror of https://github.com/tinygo-org/tinygo.git synced 2026-08-08 13:03:39 +00:00
Code Issues Packages Projects Releases 6 Wiki Activity

Working on NXP/Teensy support

Browse Source
This commit is contained in:
Ethan Reesor
2020-02-18 01:09:16 -06:00
committed by Ron Evans
parent 079a789d49
commit 59218cd784
11 changed files with 449 additions and 84 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/runtime/volatile/register_nxpmk66f18.go
+12 -17
View File
@@ -10,14 +10,14 @@ const bitbandBase = 0x42000000
const ptrBytes = unsafe.Sizeof(uintptr(0))
//go:inline
func bitbandAddress(reg uintptr, bit uintptr) uintptr {
if bit > ptrBytes*8 {
func bitbandAddress(reg uintptr, bit uint8) uintptr {
if uintptr(bit) > ptrBytes*8 {
panic("invalid bit position")
}
if reg < registerBase || reg >= registerEnd {
panic("register is out of range")
}
return (reg-registerBase)*ptrBytes*8 + bit*ptrBytes + bitbandBase
return (reg-registerBase)*ptrBytes*8 + uintptr(bit)*ptrBytes + bitbandBase
}
// Special types that causes loads/stores to be volatile (necessary for
@@ -40,17 +40,12 @@ func (r *BitRegister) Get() bool {
// *r.Reg = 1
//
//go:inline
func (r *BitRegister) Set() {
StoreUint32(&r.Reg, 1)
}
// Clear clears the mapped register bit. It is the volatile equivalent of:
//
// *r.Reg = 0
//
//go:inline
func (r *BitRegister) Clear() {
StoreUint32(&r.Reg, 0)
func (r *BitRegister) Set(v bool) {
var i uint32
if v {
i = 1
}
StoreUint32(&r.Reg, i)
}
// Bit maps bit N of register R to the corresponding bitband address. Bit panics
@@ -58,7 +53,7 @@ func (r *BitRegister) Clear() {
// the number of bits in a register minus one).
//
// go:inline
func (r *Register8) Bit(bit uintptr) *BitRegister {
func (r *Register8) Bit(bit uint8) *BitRegister {
ptr := bitbandAddress(uintptr(unsafe.Pointer(&r.Reg)), bit)
return (*BitRegister)(unsafe.Pointer(ptr))
}
@@ -68,7 +63,7 @@ func (r *Register8) Bit(bit uintptr) *BitRegister {
// the number of bits in a register minus one).
//
// go:inline
func (r *Register16) Bit(bit uintptr) *BitRegister {
func (r *Register16) Bit(bit uint8) *BitRegister {
ptr := bitbandAddress(uintptr(unsafe.Pointer(&r.Reg)), bit)
return (*BitRegister)(unsafe.Pointer(ptr))
}
@@ -78,7 +73,7 @@ func (r *Register16) Bit(bit uintptr) *BitRegister {
// the number of bits in a register minus one).
//
// go:inline
func (r *Register32) Bit(bit uintptr) *BitRegister {
func (r *Register32) Bit(bit uint8) *BitRegister {
ptr := bitbandAddress(uintptr(unsafe.Pointer(&r.Reg)), bit)
return (*BitRegister)(unsafe.Pointer(ptr))
}