examples: Makefile for older versions (<1.0) of Espressif "AT" firmware.

examples/Makefile.esp8266_at

@@ -0,0 +1,23 @@
+# Makefile for older versions (<1.0) of Espressif "AT" firmware
+CC = xtensa-lx106-elf-gcc
+CFLAGS = -Os -Iinclude -mlongcalls
+LDLIBS = -nostdlib -Wl,--start-group -lmain -lupgrade -lnet80211 -lwpa -llwip -lpp -lphy -Wl,--end-group -lcirom -lgcc
+LDFLAGS = -Teagle.app.v6.ld
+
+at-0x00000.bin: at
+    esptool.py elf2image $^
+
+at: driver/uart.o \
+    user/at_baseCmd.o \
+    user/at_cmd.o \
+    user/at_ipCmd.o \
+    user/at_wifiCmd.o \
+    user/at_port.o \
+    user/user_main.o
+    $(CC) $(LDFLAGS) $^ -o $@ $(LDLIBS)
+
+flash: at-0x00000.bin
+    esptool.py write_flash 0 at-0x00000.bin 0x40000 at-0x40000.bin
+
+connect:
+    picocom -b 115200 --omap crcrlf /dev/ttyUSB0