github.com/transparency-dev/armored-witness-boot@v0.1.0/console_debug.go (about)

     1  // Copyright 2022 The Armored Witness Boot authors. All Rights Reserved.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  //go:build console
    16  // +build console
    17  
    18  package main
    19  
    20  import (
    21  	"fmt"
    22  	"log"
    23  	"runtime"
    24  	"time"
    25  	_ "unsafe"
    26  
    27  	usbarmory "github.com/usbarmory/tamago/board/usbarmory/mk2"
    28  	"github.com/usbarmory/tamago/soc/nxp/imx6ul"
    29  )
    30  
    31  func init() {
    32  	switch model, _ := usbarmory.Model(); model {
    33  	case usbarmory.BETA, usbarmory.GAMMA:
    34  		if debugConsole, err := usbarmory.DetectDebugAccessory(250 * time.Millisecond); err == nil {
    35  			<-debugConsole
    36  		}
    37  	}
    38  
    39  	banner := fmt.Sprintf("armored-witness-boot • %s/%s (%s) • %s • %s",
    40  		runtime.GOOS, runtime.GOARCH, runtime.Version(),
    41  		Revision,
    42  		imx6ul.Model())
    43  
    44  	log.SetFlags(0)
    45  	log.Printf("%s", banner)
    46  }
    47  
    48  //go:linkname printk runtime.printk
    49  func printk(c byte) {
    50  	usbarmory.UART2.Tx(c)
    51  }