docs:how can i run with `_embdemo/hello-esp32/main.go`

[luoliwoshang]

how can i run with _embdemo/hello-esp32/main.go i have a esp32 board

[MeteorsLiu]

Can you test this?

package main

import (
       _ "unsafe"
      "github.com/goplus/lib/c"
)
// llgo:link asm llgo.asm
func asm(string) {}

//go:linkname WriteByte C.board_uart_write_char
func WriteByte(b byte)

//go:linkname StoreUint32 llgo.atomicStore
func StoreUint32(addr *uint32, val uint32)

func myprint(s *c.Char) {
	for i := 0; i < int(c.Strlen(s)); i++ {
		WriteByte(byte(c.Index(s, i)))
	}
}

func sleepNop() {
	for i := 0; i < 100000000; i++ {
		asm("nop")
	}
}

func main() {
	// shutdown watch dog
	StoreUint32((*uint32)(unsafe.Pointer(uintptr(0x3ff480A4))), 0x50D83AA1)
	StoreUint32((*uint32)(unsafe.Pointer(uintptr(0x3ff4808C))), 0)
	StoreUint32((*uint32)(unsafe.Pointer(uintptr(0x3ff5f048))), 0)
	for {
		myprint(c.Str("hello world\n"))
		sleepNop()

	}
}

[MeteorsLiu]

Build & Flash if you want to test it.

[luoliwoshang]

build

llgo build -target esp32 -o test.bin .

flash

esptool.py --chip=esp32 write_flash 0x1000 ./test.bin -ff 80m -fm dout

monitor

python /Users/zhangzhiyang/esp/esp-idf/tools/idf_monitor.py -p /dev/tty.usbserial-110 -b 115200 --target esp32 --revision 0

and i got follow at my usbserial output

rst:0x10 (RTCWDT_RTC_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DOUT, clock div:1
load:0x3fff0000,len:16
load:0x3fff0010,len:264
load:0x40078000,len:1476
entry 0x40078514
hello world
ets Jul 29 2019 12:21:46