tinygo-org/tinygo
1
0
Fork 0
mirror of https://github.com/tinygo-org/tinygo.git synced 2026-08-14 16:03:41 +00:00
Code Issues Packages Projects Releases 6 Wiki Activity

machine: make USBCDC global a pointer

Browse Source 
Make the USBCDC use a pointer receiver everywhere. This makes it easier
to pass around the object in the future.

This commit sometimes changes code size, but not significantly (a few
bytes) and usually in a positive way.

My eventual goal is the following:

  - Declare `machine.USB` (or similar, name TBD) as a pointer receiver
    for the USB-CDC interface.
  - Let `machine.UART0` always point to an UART, never actually to a
    USBCDC object.
  - Define `machine.Serial`, which is either a real UART or an USB-CDC,
    depending on the board.

This way, if you want a real UART you can use machine.UARTx and if you
just want to print to the default serial port, you can use
machine.Serial.

This change does have an effect on code size and memory consumption.
There is often a small reduction (-8 bytes) in RAM consumption and an
increase in flash consumption.
This commit is contained in:
Ayke van Laethem
2021-05-11 13:39:14 +02:00
committed by Ron Evans
parent 1646326164
commit 7c949ad386
11 changed files with 64 additions and 63 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/machine/machine_atsamd51.go
+16 -16
View File
@@ -952,7 +952,7 @@ type UART struct {
var (
// UART0 is actually a USB CDC interface.
UART0 = USBCDC{Buffer: NewRingBuffer()}
UART0 = &USBCDC{Buffer: NewRingBuffer()}
)
const (
@@ -1994,7 +1994,7 @@ func (usbcdc *USBCDC) Flush() error {
// send data by setting bank ready
setEPSTATUSSET(usb_CDC_ENDPOINT_IN, sam.USB_DEVICE_ENDPOINT_EPSTATUSSET_BK1RDY)
UART0.sent = true
usbcdc.sent = true
}
}
return nil
@@ -2008,10 +2008,10 @@ func (usbcdc *USBCDC) WriteByte(c byte) error {
for {
mask := interrupt.Disable()
idx := UART0.TxIdx.Get()
idx := usbcdc.TxIdx.Get()
if (idx & usbcdcTxSizeMask) < usbcdcTxSizeMask {
udd_ep_in_cache_buffer[usb_CDC_ENDPOINT_IN][idx] = c
UART0.TxIdx.Set(idx + 1)
usbcdc.TxIdx.Set(idx + 1)
ok = true
}
@@ -2019,26 +2019,26 @@ func (usbcdc *USBCDC) WriteByte(c byte) error {
if ok {
break
} else if usbcdcTxMaxRetriesAllowed < UART0.waitTxcRetryCount {
} else if usbcdcTxMaxRetriesAllowed < usbcdc.waitTxcRetryCount {
mask := interrupt.Disable()
UART0.waitTxc = false
UART0.waitTxcRetryCount = 0
UART0.TxIdx.Set(0)
usbcdc.waitTxc = false
usbcdc.waitTxcRetryCount = 0
usbcdc.TxIdx.Set(0)
usbLineInfo.lineState = 0
interrupt.Restore(mask)
break
} else {
mask := interrupt.Disable()
if UART0.sent {
if UART0.waitTxc {
if usbcdc.sent {
if usbcdc.waitTxc {
if (getEPINTFLAG(usb_CDC_ENDPOINT_IN) & sam.USB_DEVICE_ENDPOINT_EPINTFLAG_TRCPT1) != 0 {
setEPSTATUSCLR(usb_CDC_ENDPOINT_IN, sam.USB_DEVICE_ENDPOINT_EPSTATUSCLR_BK1RDY)
setEPINTFLAG(usb_CDC_ENDPOINT_IN, sam.USB_DEVICE_ENDPOINT_EPINTFLAG_TRCPT1)
UART0.waitTxc = false
UART0.Flush()
usbcdc.waitTxc = false
usbcdc.Flush()
}
} else {
UART0.Flush()
usbcdc.Flush()
}
}
interrupt.Restore(mask)
@@ -2049,11 +2049,11 @@ func (usbcdc *USBCDC) WriteByte(c byte) error {
return nil
}
func (usbcdc USBCDC) DTR() bool {
func (usbcdc *USBCDC) DTR() bool {
return (usbLineInfo.lineState & usb_CDC_LINESTATE_DTR) > 0
}
func (usbcdc USBCDC) RTS() bool {
func (usbcdc *USBCDC) RTS() bool {
return (usbLineInfo.lineState & usb_CDC_LINESTATE_RTS) > 0
}
@@ -2088,7 +2088,7 @@ var (
)
// Configure the USB CDC interface. The config is here for compatibility with the UART interface.
func (usbcdc USBCDC) Configure(config UARTConfig) {
func (usbcdc *USBCDC) Configure(config UARTConfig) {
// reset USB interface
sam.USB_DEVICE.CTRLA.SetBits(sam.USB_DEVICE_CTRLA_SWRST)
for sam.USB_DEVICE.SYNCBUSY.HasBits(sam.USB_DEVICE_SYNCBUSY_SWRST) ||