basic_example on esp-12e (nodemcu v1.0) doesn't work

[adibacco]

I built the basic_example (https://github.com/esp8266/source-code-examples.git) and simply put the following code at the beginning of user_init

    uart_div_modify(0, UART_CLK_FREQ / 115200);

    while (true) {
        os_printf("Starting\n\r");
        os_delay_us(1000000);
    }

then considering that nodemcu v1.0 uses DIO for SPI flash, I modified the Makefile in two places:

- $(Q) $(ESPTOOL) elf2image -o $(FW_BASE)/ $(TARGET_OUT)
+ $(Q) $(ESPTOOL) elf2image --version=2 -o $(FW_BASE)/fw.bin $(TARGET_OUT)

in order to obtain a single bin and I added some options to esptool for loading:

- $(ESPTOOL) --port $(ESPPORT) write_flash $(FW_FILE_1_ADDR) $(FW_FILE_1) $(FW_FILE_2_ADDR) $(FW_FILE_2)
+ $(ESPTOOL) --port $(ESPPORT) write_flash -fm dio -fs 32m -ff 40m $(FW_FILE_ADDR) $(FW_BASE)/$(FW_FILE)

The program doesn't start up, I expected a periodic printing but I don't get anything.

I tried to load the nodemcu bin with the esptool command and I get a CHECK MEM FAIL even if it does work.

[dfries]

This is the first day I've tried to load anything on the ESP8266 myself. I was getting garbage out of the stock basic_example myself. You do need uart_div_modify, with that infinite loop in there I get a few Starting followed by a watchdog timer reboot, add the uart_div_modify but put your print in the provided loop function (don't have that infinite loop). You must have a different problem though, because you should at least see something.