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boards/common/esp8266: Set RTS and DTR to 0 on pyterm.

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When flashing the ESP8266 with the flash tool it is possible to connect
RTS to the reset line and DTR to GPIO0 to automatically reboot the
device into flash mode and then reboot the device again into normal
mode.

pyterm leaves these two signals unset unless we specify a --set-rts=0 or
1, and the value of these lines would depend on the UART driver.

This patch explicitly sets RTS and DTR to 0 (high level) in the
Makefile.include config so `make term` releases the reset line,
otherwise the device may be left in reset mode after pyterm starts.
This commit is contained in:
iosabi 2021-04-10 22:47:05 +02:00
parent 0397cab91c
commit 73fab03e31
1 changed files with 4 additions and 0 deletions
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4
boards/common/esp8266/Makefile.include
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@ -1,3 +1,7 @@
# configure the serial interface
PORT_LINUX ?= /dev/ttyUSB0
PORT_DARWIN ?= $(firstword $(sort $(wildcard /dev/tty.SLAB_USBtoUART*)))
# Set RTS and DTR to 0 to release reset when RTS is connected to the reset pin
# and DTR to GPIO0.
PYTERMFLAGS += --set-rts 0 --set-dtr 0