From e5d4fbb164347b18dc7112341fabd9ffdf3b6f16 Mon Sep 17 00:00:00 2001
From: geeksville <kevinh@geeksville.com>
Date: Mon, 28 Sep 2020 13:03:37 -0700
Subject: [PATCH 01/10] fix pins per email eink

---
 bin/install-bootloader.sh    | 29 +++++++++++++++++++++++++
 src/graphics/EInkDisplay.cpp |  5 +++++
 src/nrf52/main-nrf52.cpp     |  5 -----
 variants/eink/variant.h      | 42 ++++++++++++++++++++----------------
 4 files changed, 57 insertions(+), 24 deletions(-)
 create mode 100755 bin/install-bootloader.sh

diff --git a/bin/install-bootloader.sh b/bin/install-bootloader.sh
new file mode 100755
index 0000000000..3c7db57396
--- /dev/null
+++ b/bin/install-bootloader.sh
@@ -0,0 +1,29 @@
+# You probably don't want to use this script, it programs a custom bootloader build onto a nrf52 board
+
+BOOTDIR=/home/kevinh/development/meshtastic/Adafruit_nRF52_Bootloader
+
+nrfjprog --eraseall -f nrf52
+
+#echo Programming soft device
+#nrfjprog --program $BOOTDIR/lib/softdevice/s140_nrf52_6.1.1/s140_nrf52_6.1.1_softdevice.hex -f nrf52
+
+echo Programming bootloader and soft device
+# the following ling incorrectly enables reset pin, because the running code rewrites it
+nrfjprog --program $BOOTDIR/_build/build-ttgo_eink/ttgo_eink_bootloader-0.3.2-122-gf6bfaac-dirty_s140_6.1.1.hex -f nrf52
+
+# this generates an intel hex file that can be programmed into a NRF52 to tell the adafruit bootloader that the current app image is valid
+# Bootloader settings are at BOOTLOADER_SETTINGS (rw) : ORIGIN = 0xFF000, LENGTH = 0x1000
+# first 4 bytes should be 0x01 to indicate valid app image
+# second 4 bytes should be 0x00 to indicate no CRC required for image
+echo "01 00 00 00 00 00 00 00" | xxd -r -p - >/tmp/bootconf.bin
+srec_cat /tmp/bootconf.bin -binary -offset 0xff000 -output /tmp/bootconf.hex -intel   
+
+echo Programming meshtastic app load
+nrfjprog --program .pio/build/eink/firmware.hex -f nrf52
+
+echo Telling bootloader app region is valid and telling CPU to run
+nrfjprog --program /tmp/bootconf.hex -f nrf52 --reset
+
+# nrfjprog --readuicr /tmp/uicr.hex; objdump -s /tmp/uicr.hex | less
+
+echo FIXME use hexmerge
diff --git a/src/graphics/EInkDisplay.cpp b/src/graphics/EInkDisplay.cpp
index 2156f59190..da468af38b 100644
--- a/src/graphics/EInkDisplay.cpp
+++ b/src/graphics/EInkDisplay.cpp
@@ -95,6 +95,11 @@ bool EInkDisplay::connect()
 {
     DEBUG_MSG("Doing EInk init\n");
 
+#ifdef EINK_PIN_PWR_ON
+    digitalWrite(EINK_PIN_PWR_ON, HIGH); // If we need to assert a pin to power external peripherals
+    pinMode(EINK_PIN_PWR_ON, OUTPUT);
+#endif
+
 #ifdef PIN_EINK_EN
     digitalWrite(PIN_EINK_EN, HIGH);
     pinMode(PIN_EINK_EN, OUTPUT);
diff --git a/src/nrf52/main-nrf52.cpp b/src/nrf52/main-nrf52.cpp
index 4a5c93f75f..867cdeefcc 100644
--- a/src/nrf52/main-nrf52.cpp
+++ b/src/nrf52/main-nrf52.cpp
@@ -93,11 +93,6 @@ void nrf52Setup()
     // This is the recommended setting for Monitor Mode Debugging
     NVIC_SetPriority(DebugMonitor_IRQn, 6UL);
 
-#ifdef PIN_PWR_ON
-    digitalWrite(PIN_PWR_ON, HIGH); // If we need to assert a pin to power external peripherals
-    pinMode(PIN_PWR_ON, OUTPUT);
-#endif
-
     // Not yet on board
     // pmu.init();
 
diff --git a/variants/eink/variant.h b/variants/eink/variant.h
index e0cdda0d25..0c6f4eab36 100644
--- a/variants/eink/variant.h
+++ b/variants/eink/variant.h
@@ -27,25 +27,29 @@
 /*
 @geeksville eink TODO:
 
-confirm that watchdog reset (i.e. all pins now become inputs) won't cause the board to power down when we are not connected to USB
-(I bet it will). If this happens recommended fix is to add an external pullup on PWR_ON GPIO.
-
+soonish:
+hook cdc acm device to debug output
 fix bootloader to use two buttons - remove bootloader hacks
-fix battery voltage sensing
-fix floating point SEGGER printf on nrf52 - see "new NMEA GPS pos"
 get second button working in app load
-if battery falls too low deassert PWR_ON (to force board to shutdown)
 fix display width and height
 clean up eink drawing to not have the nasty timeout hack
+measure current draws
 put eink to sleep when we think the screen is off
-enable flash on spi0, share chip selects on spi1.
-https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.nrf52832.ps.v1.1%2Fspi.html enable reset as a button in
-bootloader fix battery pin usage drive TCXO DIO3 enable high whenever we want the clock use PIN_GPS_WAKE to sleep the GPS use
-tp_ser_io as a button, it goes high when pressed unify eink display classes
-make screen.adjustBrightness() a nop on eink screens
 enable gps sleep mode
-use new flash chip
+https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.nrf52832.ps.v1.1%2Fspi.html enable reset as a button
+make screen.adjustBrightness() a nop on eink screens
+
+later:
+confirm that watchdog reset (i.e. all pins now become inputs) won't cause the board to power down when we are not connected to USB
+(I bet it will). If this happens recommended fix is to add an external pullup on PWR_ON GPIO.
+enable flash on spi0, share chip selects on spi1.
+fix floating point SEGGER printf on nrf52 - see "new NMEA GPS pos"
 add factory/power on self test
+use tp_ser_io as a button, it goes high when pressed unify eink display classes
+
+feedback to give:
+remove ipx connector for nfc, instead use two caps and loop traces on the back of the board as an antenna?
+
 */
 
 /*----------------------------------------------------------------------------
@@ -122,9 +126,6 @@ work.
 
 #define TP_SER_IO (0 + 11)
 
-// Board power is enabled either by VBUS from USB or the CPU asserting PWR_ON
-#define PIN_PWR_ON (0 + 12)
-
 #define PIN_RTC_INT (0 + 16) // Interrupt from the PCF8563 RTC
 
 /*
@@ -175,6 +176,9 @@ FIXME define/FIX flash access
 #define PIN_EINK_SCLK (0 + 31)
 #define PIN_EINK_MOSI (0 + 29) // also called SDI
 
+// Controls power for the eink display - Board power is enabled either by VBUS from USB or the CPU asserting PWR_ON
+#define PIN_EINK_PWR_ON (0 + 12)
+
 #define HAS_EINK
 
 #define PIN_SPI1_MISO                                                                                                            \
@@ -186,10 +190,10 @@ FIXME define/FIX flash access
  * Air530 GPS pins
  */
 
-#define PIN_GPS_WAKE (32 + 2)
-#define PIN_GPS_PPS (32 + 4)
-#define PIN_GPS_TX (32 + 9) // This is for bits going TOWARDS the CPU
-#define PIN_GPS_RX (32 + 8) // This is for bits going TOWARDS the GPS
+#define PIN_GPS_WAKE (32 + 2) // An output to wake GPS, low means allow sleep, high means force wake
+#define PIN_GPS_PPS (32 + 4)  // Pulse per second input from the GPS
+#define PIN_GPS_TX (32 + 9)   // This is for bits going TOWARDS the CPU
+#define PIN_GPS_RX (32 + 8)   // This is for bits going TOWARDS the GPS
 
 #define PIN_SERIAL1_RX PIN_GPS_TX
 #define PIN_SERIAL1_TX PIN_GPS_RX

From a0fd83428f2c0c3945234a2ebc920e8cb70712f4 Mon Sep 17 00:00:00 2001
From: geeksville <kevinh@geeksville.com>
Date: Mon, 28 Sep 2020 13:10:27 -0700
Subject: [PATCH 02/10] eink use RESET button as regular button instead

---
 src/configuration.h     | 4 ++++
 variants/eink/variant.h | 1 +
 2 files changed, 5 insertions(+)

diff --git a/src/configuration.h b/src/configuration.h
index 026bb1880c..ad783d0d5c 100644
--- a/src/configuration.h
+++ b/src/configuration.h
@@ -77,6 +77,10 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define BUTTON_PIN PIN_BUTTON1
 #endif
 
+#ifdef PIN_BUTTON2
+#define BUTTON_PIN_ALT PIN_BUTTON2
+#endif
+
 // FIXME, use variant.h defs for all of this!!! (even on the ESP32 targets)
 #elif defined(CubeCell_BoardPlus)
 
diff --git a/variants/eink/variant.h b/variants/eink/variant.h
index 0c6f4eab36..6ab4e073b3 100644
--- a/variants/eink/variant.h
+++ b/variants/eink/variant.h
@@ -87,6 +87,7 @@ extern "C" {
  * Buttons
  */
 #define PIN_BUTTON1 (32 + 10)
+#define PIN_BUTTON2 (0 + 18) // 0.18 is labeled on the board as RESET but we configure it in the bootloader as a regular GPIO
 
 /*
  * Analog pins

From 6a4ef7e1d12dc209a6aeaacefecedd8047877c37 Mon Sep 17 00:00:00 2001
From: geeksville <kevinh@geeksville.com>
Date: Mon, 28 Sep 2020 14:09:19 -0700
Subject: [PATCH 03/10] eink board serial flash seems to work

---
 bin/qspi-flash-test.sh   |  6 ++++
 nrf52/ttgo_eink_qpsi.ini | 69 ++++++++++++++++++++++++++++++++++++++++
 variants/eink/variant.h  | 37 +++++++++++----------
 3 files changed, 95 insertions(+), 17 deletions(-)
 create mode 100755 bin/qspi-flash-test.sh
 create mode 100644 nrf52/ttgo_eink_qpsi.ini

diff --git a/bin/qspi-flash-test.sh b/bin/qspi-flash-test.sh
new file mode 100755
index 0000000000..7fc186b5d3
--- /dev/null
+++ b/bin/qspi-flash-test.sh
@@ -0,0 +1,6 @@
+# You probably don't need this - it is a basic test of the serial flash on the TTGO eink board
+
+nrfjprog -qspiini nrf52/ttgo_eink_qpsi.ini --qspieraseall
+nrfjprog --qspiini nrf52/ttgo_eink_qpsi.ini --memwr 0x12000000 --val 0xdeadbeef --verify
+nrfjprog --qspiini nrf52/ttgo_eink_qpsi.ini --readqspi spi.hex
+objdump -s spi.hex | less
diff --git a/nrf52/ttgo_eink_qpsi.ini b/nrf52/ttgo_eink_qpsi.ini
new file mode 100644
index 0000000000..d477db8ef7
--- /dev/null
+++ b/nrf52/ttgo_eink_qpsi.ini
@@ -0,0 +1,69 @@
+; nrfjprog.exe configuration file.
+
+; Note: QSPI flash is mapped into memory at address 0x12000000
+
+[DEFAULT_CONFIGURATION]
+; Define the capacity of the flash memory device in bytes. Set to 0 if no external memory device is present in your board.
+; MX25R1635F is 16Mbit/2Mbyte
+MemSize = 0x200000
+
+; Define the desired ReadMode. Valid options are FASTREAD, READ2O, READ2IO, READ4O and READ4IO
+ReadMode = READ2IO
+
+; Define the desired WriteMode. Valid options are PP, PP2O, PP4O and PP4IO
+WriteMode = PP
+
+; Define the desired AddressMode. Valid options are BIT24 and BIT32
+AddressMode = BIT24
+
+; Define the desired Frequency. Valid options are M2, M4, M8, M16 and M32
+Frequency = M16
+
+; Define the desired SPI mode. Valid options are MODE0 and MODE3
+SpiMode = MODE0
+
+; Define the desired SckDelay. Valid options are in the range 0 to 255
+SckDelay = 0x80
+
+; Define the desired IO level for DIO2 and DIO3 during a custom instruction. Valid options are LEVEL_HIGH and LEVEL_LOW
+CustomInstructionIO2Level = LEVEL_LOW
+CustomInstructionIO3Level = LEVEL_HIGH
+
+; Define the assigned pins for the QSPI peripheral. Valid options are those existing in your device
+CSNPin = 15
+CSNPort = 1
+SCKPin = 14
+SCKPort = 1
+DIO0Pin = 12
+DIO0Port = 1
+DIO1Pin = 13
+DIO1Port = 1
+
+;These two pins are not connected, but we must name something
+DIO2Pin = 3
+DIO2Port = 1
+DIO3Pin = 5
+DIO3Port = 1
+
+; Define the Index of the Write In Progress (WIP) bit in the status register. Valid options are in the range of 0 to 7.
+WIPIndex = 0
+
+; Define page size for commands. Valid sizes are PAGE256 and PAGE512.
+PPSize = PAGE256
+
+; Custom instructions to send to the external memory after initialization. Format is instruction code plus data to send in between optional brakets. 
+; These instructions will be executed each time the qspi peripheral is initiated by nrfjprog. 
+; To improve execution speed on consecutive interations with QSPI, you can run nrfjprog once with custom initialization, and then comment out the lines below.
+; Numbers can be given in decimal, hex (starting with either 0x or 0X) and binary (starting with either 0b or 0B) formats. 
+; The custom instructions will be executed in the order found. 
+
+; This example includes two commands, first a WREN (WRite ENable) and then a WRSR (WRite Satus Register) enabling the Quad Operation and the High Performance
+; mode for the MX25R6435F memory present in the nRF52840 DK.
+;InitializationCustomInstruction =  0x06
+;InitializationCustomInstruction =  0x01, [0x40, 0, 0x2]
+
+; For MX25R1635F on TTGO board, only two data lines are connected
+; This example includes two commands, first a WREN (WRite ENable) and then a WRSR (WRite Satus Register) disabling Quad Operation and the High Performance
+; mode.  For normal operation you might want low power mode instead.
+InitializationCustomInstruction =  0x06
+InitializationCustomInstruction =  0x01, [0x00, 0, 0x2]
diff --git a/variants/eink/variant.h b/variants/eink/variant.h
index 6ab4e073b3..c1781c84e4 100644
--- a/variants/eink/variant.h
+++ b/variants/eink/variant.h
@@ -30,7 +30,7 @@
 soonish:
 hook cdc acm device to debug output
 fix bootloader to use two buttons - remove bootloader hacks
-get second button working in app load
+DONE get second button working in app load
 fix display width and height
 clean up eink drawing to not have the nasty timeout hack
 measure current draws
@@ -48,8 +48,14 @@ add factory/power on self test
 use tp_ser_io as a button, it goes high when pressed unify eink display classes
 
 feedback to give:
-remove ipx connector for nfc, instead use two caps and loop traces on the back of the board as an antenna?
 
+* remove ipx connector for nfc, instead use two caps and loop traces on the back of the board as an antenna?
+
+* I've made the serial flash chip work, but if you do a new spin of the board I recommend:
+connect pin 3 and pin 7 of U4 to spare GPIOs on the processor (instead of their current connections), 
+This would allow using 4 bit wide interface mode to the serial flash.
+doubling the transfer speed! see example here:
+https://infocenter.nordicsemi.com/topic/ug_nrf52840_dk/UG/nrf52840_DK/hw_external_memory.html?cp=4_0_4_7_4
 */
 
 /*----------------------------------------------------------------------------
@@ -108,11 +114,10 @@ static const uint8_t A0 = PIN_A0;
  */
 
 /*
-This serial port is _also_ connected to the incoming D+/D- pins from the USB header.  FIXME, figure out how that is supposed to
-work.
+No longer populated on PCB
 */
-#define PIN_SERIAL2_RX (0 + 6)
-#define PIN_SERIAL2_TX (0 + 8)
+//#define PIN_SERIAL2_RX (0 + 6)
+//#define PIN_SERIAL2_TX (0 + 8)
 // #define PIN_SERIAL2_EN (0 + 17)
 
 /**
@@ -130,23 +135,21 @@ work.
 #define PIN_RTC_INT (0 + 16) // Interrupt from the PCF8563 RTC
 
 /*
-
-FIXME define/FIX flash access
+External serial flash WP25R1635FZUIL0
+*/
 
 // QSPI Pins
-#define PIN_QSPI_SCK 19
-#define PIN_QSPI_CS 17
-#define PIN_QSPI_IO0 20
-#define PIN_QSPI_IO1 21
-#define PIN_QSPI_IO2 22
-#define PIN_QSPI_IO3 23
+#define PIN_QSPI_SCK (32 + 14)
+#define PIN_QSPI_CS (32 + 15)
+#define PIN_QSPI_IO0 (32 + 12) // MOSI if using two bit interface
+#define PIN_QSPI_IO1 (32 + 13) // MISO if using two bit interface
+//#define PIN_QSPI_IO2 22 // WP if using two bit interface (i.e. not used)
+//#define PIN_QSPI_IO3 23 // HOLD if using two bit interface (i.e. not used)
 
 // On-board QSPI Flash
-#define EXTERNAL_FLASH_DEVICES MX25R6435F
+#define EXTERNAL_FLASH_DEVICES MX25R1635F
 #define EXTERNAL_FLASH_USE_QSPI
 
-*/
-
 /*
  * Lora radio
  */

From 116fe6d109b828800199f3cc452c05ddc16bc384 Mon Sep 17 00:00:00 2001
From: geeksville <kevinh@geeksville.com>
Date: Mon, 28 Sep 2020 15:18:32 -0700
Subject: [PATCH 04/10] eink bootloader finished

---
 bin/install-bootloader.sh | 4 +++-
 variants/eink/variant.h   | 7 +++++--
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/bin/install-bootloader.sh b/bin/install-bootloader.sh
index 3c7db57396..4d99af45b6 100755
--- a/bin/install-bootloader.sh
+++ b/bin/install-bootloader.sh
@@ -1,5 +1,7 @@
 # You probably don't want to use this script, it programs a custom bootloader build onto a nrf52 board
 
+set -e 
+
 BOOTDIR=/home/kevinh/development/meshtastic/Adafruit_nRF52_Bootloader
 
 nrfjprog --eraseall -f nrf52
@@ -9,7 +11,7 @@ nrfjprog --eraseall -f nrf52
 
 echo Programming bootloader and soft device
 # the following ling incorrectly enables reset pin, because the running code rewrites it
-nrfjprog --program $BOOTDIR/_build/build-ttgo_eink/ttgo_eink_bootloader-0.3.2-122-gf6bfaac-dirty_s140_6.1.1.hex -f nrf52
+nrfjprog --program $BOOTDIR/_build/build-ttgo_eink/ttgo_eink_bootloader-0.3.2-123-g4f9022d-dirty_s140_6.1.1.hex -f nrf52
 
 # this generates an intel hex file that can be programmed into a NRF52 to tell the adafruit bootloader that the current app image is valid
 # Bootloader settings are at BOOTLOADER_SETTINGS (rw) : ORIGIN = 0xFF000, LENGTH = 0x1000
diff --git a/variants/eink/variant.h b/variants/eink/variant.h
index c1781c84e4..c4e1a77955 100644
--- a/variants/eink/variant.h
+++ b/variants/eink/variant.h
@@ -51,11 +51,14 @@ feedback to give:
 
 * remove ipx connector for nfc, instead use two caps and loop traces on the back of the board as an antenna?
 
+* the i2c RTC seems to talk fine on the i2c bus
+
 * I've made the serial flash chip work, but if you do a new spin of the board I recommend:
 connect pin 3 and pin 7 of U4 to spare GPIOs on the processor (instead of their current connections), 
-This would allow using 4 bit wide interface mode to the serial flash.
-doubling the transfer speed! see example here:
+This would allow using 4 bit wide interface mode to the serial flash - doubling the transfer speed! see example here:
 https://infocenter.nordicsemi.com/topic/ug_nrf52840_dk/UG/nrf52840_DK/hw_external_memory.html?cp=4_0_4_7_4
+Once again - I'm glad you added that external flash chip. 
+
 */
 
 /*----------------------------------------------------------------------------

From 158e3edbe74f5de53dfb9c0ebc2db4242aa1d1af Mon Sep 17 00:00:00 2001
From: geeksville <kevinh@geeksville.com>
Date: Mon, 28 Sep 2020 15:21:54 -0700
Subject: [PATCH 05/10] eink generate full image

---
 bin/install-bootloader.sh | 15 +++------------
 1 file changed, 3 insertions(+), 12 deletions(-)

diff --git a/bin/install-bootloader.sh b/bin/install-bootloader.sh
index 4d99af45b6..842a64bc31 100755
--- a/bin/install-bootloader.sh
+++ b/bin/install-bootloader.sh
@@ -6,13 +6,6 @@ BOOTDIR=/home/kevinh/development/meshtastic/Adafruit_nRF52_Bootloader
 
 nrfjprog --eraseall -f nrf52
 
-#echo Programming soft device
-#nrfjprog --program $BOOTDIR/lib/softdevice/s140_nrf52_6.1.1/s140_nrf52_6.1.1_softdevice.hex -f nrf52
-
-echo Programming bootloader and soft device
-# the following ling incorrectly enables reset pin, because the running code rewrites it
-nrfjprog --program $BOOTDIR/_build/build-ttgo_eink/ttgo_eink_bootloader-0.3.2-123-g4f9022d-dirty_s140_6.1.1.hex -f nrf52
-
 # this generates an intel hex file that can be programmed into a NRF52 to tell the adafruit bootloader that the current app image is valid
 # Bootloader settings are at BOOTLOADER_SETTINGS (rw) : ORIGIN = 0xFF000, LENGTH = 0x1000
 # first 4 bytes should be 0x01 to indicate valid app image
@@ -20,12 +13,10 @@ nrfjprog --program $BOOTDIR/_build/build-ttgo_eink/ttgo_eink_bootloader-0.3.2-12
 echo "01 00 00 00 00 00 00 00" | xxd -r -p - >/tmp/bootconf.bin
 srec_cat /tmp/bootconf.bin -binary -offset 0xff000 -output /tmp/bootconf.hex -intel   
 
-echo Programming meshtastic app load
-nrfjprog --program .pio/build/eink/firmware.hex -f nrf52
+echo Generating merged hex file 
+mergehex -m $BOOTDIR/_build/build-ttgo_eink/ttgo_eink_bootloader-0.3.2-123-g4f9022d-dirty_s140_6.1.1.hex .pio/build/eink/firmware.hex /tmp/bootconf.hex -o ttgo_eink_full.hex
 
 echo Telling bootloader app region is valid and telling CPU to run
-nrfjprog --program /tmp/bootconf.hex -f nrf52 --reset
+nrfjprog --program ttgo_eink_full.hex -f nrf52 --reset
 
 # nrfjprog --readuicr /tmp/uicr.hex; objdump -s /tmp/uicr.hex | less
-
-echo FIXME use hexmerge

From bc50b39a3b34370e4a3f2ad2a73eb73460c20afa Mon Sep 17 00:00:00 2001
From: geeksville <kevinh@geeksville.com>
Date: Mon, 28 Sep 2020 16:08:52 -0700
Subject: [PATCH 06/10] put eink screen to sleep to save power

---
 src/graphics/EInkDisplay.cpp | 17 +++++++++++------
 variants/eink/variant.h      | 30 ++++++++++++++++++------------
 2 files changed, 29 insertions(+), 18 deletions(-)

diff --git a/src/graphics/EInkDisplay.cpp b/src/graphics/EInkDisplay.cpp
index da468af38b..56363c1929 100644
--- a/src/graphics/EInkDisplay.cpp
+++ b/src/graphics/EInkDisplay.cpp
@@ -56,7 +56,8 @@ uint32_t lastDrawMsec;
 // Write the buffer to the display memory
 void EInkDisplay::display(void)
 {
-    concurrency::LockGuard g(spiLock);
+    // No need to grab this lock because we are on our own SPI bus
+    // concurrency::LockGuard g(spiLock);
 
     uint32_t now = millis();
     uint32_t sinceLast = now - lastDrawMsec;
@@ -76,10 +77,14 @@ void EInkDisplay::display(void)
             }
         }
 
+        ePaper.Reset(); // wake the screen from sleep
+
+        DEBUG_MSG("Updating eink... ");
         updateDisplay(); // Send image to display and refresh
+        DEBUG_MSG("done\n");
 
-        // Put screen to sleep to save power (if wanted)
-        // ePaper.Sleep();
+        // Put screen to sleep to save power 
+        ePaper.Sleep();
     }
 }
 
@@ -95,9 +100,9 @@ bool EInkDisplay::connect()
 {
     DEBUG_MSG("Doing EInk init\n");
 
-#ifdef EINK_PIN_PWR_ON
-    digitalWrite(EINK_PIN_PWR_ON, HIGH); // If we need to assert a pin to power external peripherals
-    pinMode(EINK_PIN_PWR_ON, OUTPUT);
+#ifdef PIN_EINK_PWR_ON
+    digitalWrite(PIN_EINK_PWR_ON, HIGH); // If we need to assert a pin to power external peripherals
+    pinMode(PIN_EINK_PWR_ON, OUTPUT);
 #endif
 
 #ifdef PIN_EINK_EN
diff --git a/variants/eink/variant.h b/variants/eink/variant.h
index c4e1a77955..c0738746df 100644
--- a/variants/eink/variant.h
+++ b/variants/eink/variant.h
@@ -28,36 +28,42 @@
 @geeksville eink TODO:
 
 soonish:
-hook cdc acm device to debug output
-fix bootloader to use two buttons - remove bootloader hacks
+DONE hook cdc acm device to debug output
+DONE fix bootloader to use two buttons - remove bootloader hacks
 DONE get second button working in app load
+DONE use tp_ser_io as a button, it goes high when pressed unify eink display classes
 fix display width and height
 clean up eink drawing to not have the nasty timeout hack
 measure current draws
-put eink to sleep when we think the screen is off
+DONE put eink to sleep when we think the screen is off
 enable gps sleep mode
-https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.nrf52832.ps.v1.1%2Fspi.html enable reset as a button
+turn off txco on lora?
 make screen.adjustBrightness() a nop on eink screens
 
 later:
-confirm that watchdog reset (i.e. all pins now become inputs) won't cause the board to power down when we are not connected to USB
-(I bet it will). If this happens recommended fix is to add an external pullup on PWR_ON GPIO.
-enable flash on spi0, share chip selects on spi1.
+enable flash on qspi.
 fix floating point SEGGER printf on nrf52 - see "new NMEA GPS pos"
 add factory/power on self test
-use tp_ser_io as a button, it goes high when pressed unify eink display classes
 
 feedback to give:
 
+* bootloader is finished
+
+* the capacitive touch sensor works, though I'm not sure what use you are intending for it
+
 * remove ipx connector for nfc, instead use two caps and loop traces on the back of the board as an antenna?
 
-* the i2c RTC seems to talk fine on the i2c bus
+* the i2c RTC seems to talk fine on the i2c bus.  However, I'm not sure of the utility of that part.  Instead I'd be in favor of the following:
+
+* move BAT1 to power the GPS VBACKUP instead per page 6 of the Air530 datasheet.  And remove the i2c RTC entirely.
+
+* remove the cp2014 chip.
 
 * I've made the serial flash chip work, but if you do a new spin of the board I recommend:
-connect pin 3 and pin 7 of U4 to spare GPIOs on the processor (instead of their current connections), 
+connect pin 3 and pin 7 of U4 to spare GPIOs on the processor (instead of their current connections),
 This would allow using 4 bit wide interface mode to the serial flash - doubling the transfer speed! see example here:
 https://infocenter.nordicsemi.com/topic/ug_nrf52840_dk/UG/nrf52840_DK/hw_external_memory.html?cp=4_0_4_7_4
-Once again - I'm glad you added that external flash chip. 
+Once again - I'm glad you added that external flash chip.
 
 */
 
@@ -210,7 +216,7 @@ External serial flash WP25R1635FZUIL0
  */
 #define SPI_INTERFACES_COUNT 2
 
-// For LORA
+// For LORA, spi 0
 #define PIN_SPI_MISO (0 + 23)
 #define PIN_SPI_MOSI (0 + 22)
 #define PIN_SPI_SCK (0 + 19)

From fec7a6bf173ce6eb4d631a766d10a35438ec3309 Mon Sep 17 00:00:00 2001
From: geeksville <kevinh@geeksville.com>
Date: Mon, 28 Sep 2020 17:04:19 -0700
Subject: [PATCH 07/10] add air530 gps sleep support

---
 src/gps/Air530GPS.cpp        | 87 ++++++++++++++++++++++++++++++++++++
 src/gps/Air530GPS.h          | 22 +++++++++
 src/gps/GPS.cpp              | 17 +++++++
 src/gps/GPS.h                | 16 +++++++
 src/gps/NMEAGPS.cpp          | 74 ++++++++++--------------------
 src/gps/UBloxGPS.cpp         |  4 +-
 src/gps/UBloxGPS.h           |  2 -
 src/graphics/EInkDisplay.cpp |  2 +-
 src/main.cpp                 |  8 +++-
 variants/eink/variant.h      |  2 +
 10 files changed, 176 insertions(+), 58 deletions(-)
 create mode 100644 src/gps/Air530GPS.cpp
 create mode 100644 src/gps/Air530GPS.h

diff --git a/src/gps/Air530GPS.cpp b/src/gps/Air530GPS.cpp
new file mode 100644
index 0000000000..6223c1fc7e
--- /dev/null
+++ b/src/gps/Air530GPS.cpp
@@ -0,0 +1,87 @@
+#include "Air530GPS.h"
+#include <assert.h>
+
+/*
+Helpful translations from the Air530 GPS datasheet
+
+Sat acquision mode
+捕获电流值@3.3v 42.6 mA
+
+sat tracking mode
+跟踪电流值@3.3v 36.7 mA
+
+Low power mode
+低功耗模式@3.3V 0.85 mA
+(发送指令:$PGKC051,0)
+
+Super low power mode
+超低功耗模式@3.3V 31 uA
+(发送指令:$PGKC105,4)
+
+To exit sleep use WAKE pin
+
+Commands to enter sleep
+6、Command: 105
+进入周期性低功耗模式
+Arguments:
+
+Arg1: “0”,正常运行模式 (normal mode)
+“1”,周期超低功耗跟踪模式,需要拉高 WAKE 来唤醒 (periodic low power tracking mode - keeps sat positions, use wake to wake up)
+“2”,周期低功耗模式 (periodic low power mode)
+“4”,直接进入超低功耗跟踪模式,需要拉高 WAKE 来唤醒 (super low power consumption mode immediately, need WAKE to resume)
+“8”,自动低功耗模式,可以通过串口唤醒 (automatic low power mode, wake by sending characters to serial port)
+“9”, 自动超低功耗跟踪模式,需要拉高 WAKE 来唤醒 (automatic low power tracking when possible, need wake pin to resume)
+
+(Arg 2 & 3 only valid if Arg1 is "1" or "2")
+Arg2:运行时间(毫秒),在 Arg1 为 1、2 的周期模式下,此参数起作用
+ON time in msecs
+
+Arg3:睡眠时间(毫秒),在 Arg1 为 1、2 的周期模式下,此参数起作用
+Sleep time in msecs
+
+Example:
+$PGKC105,8*3F<CR><LF>
+This will set automatic low power mode with waking when we send chars to the serial port.  Possibly do this as soon as we get a
+new location.  When we wake again in a minute we send a character to wake up.
+
+*/
+
+
+void Air530GPS::sendCommand(const char *cmd) {
+    uint8_t sum = 0;
+
+    // Skip the $
+    assert(cmd[0] == '$');
+    const char *p = cmd + 1;
+    while(*p)
+        sum ^= *p++;
+
+    assert(_serial_gps);
+   
+    _serial_gps->write(cmd);
+    _serial_gps->printf("*%02x\r\n", sum);
+
+    // DEBUG_MSG("xsum %02x\n", sum);
+}
+
+void Air530GPS::sleep() {
+#ifdef PIN_GPS_WAKE
+    digitalWrite(PIN_GPS_WAKE, 0);
+    pinMode(PIN_GPS_WAKE, OUTPUT);
+    sendCommand("$PGKC105,4");
+#endif
+}
+
+/// wake the GPS into normal operation mode
+void Air530GPS::wake()
+{
+#if 0
+#ifdef PIN_GPS_WAKE
+    digitalWrite(PIN_GPS_WAKE, 1);
+    pinMode(PIN_GPS_WAKE, OUTPUT);
+#endif
+#else
+    // For power testing
+    sleep();
+#endif
+}
\ No newline at end of file
diff --git a/src/gps/Air530GPS.h b/src/gps/Air530GPS.h
new file mode 100644
index 0000000000..bbb9f80038
--- /dev/null
+++ b/src/gps/Air530GPS.h
@@ -0,0 +1,22 @@
+#pragma once
+
+#include "NMEAGPS.h"
+
+/**
+ * A gps class thatreads from a NMEA GPS stream (and FIXME - eventually keeps the gps powered down except when reading)
+ *
+ * When new data is available it will notify observers.
+ */
+class Air530GPS : public NMEAGPS
+{
+  protected:
+    /// If possible force the GPS into sleep/low power mode
+    virtual void sleep();
+
+    /// wake the GPS into normal operation mode
+    virtual void wake();
+
+  private:
+    /// Send a NMEA cmd with checksum
+    void sendCommand(const char *str);
+};
diff --git a/src/gps/GPS.cpp b/src/gps/GPS.cpp
index b3ab28d290..f8b29de3dc 100644
--- a/src/gps/GPS.cpp
+++ b/src/gps/GPS.cpp
@@ -85,3 +85,20 @@ uint32_t getValidTime()
 {
     return timeSetFromGPS ? getTime() : 0;
 }
+
+/**
+ * Switch the GPS into a mode where we are actively looking for a lock, or alternatively switch GPS into a low power mode
+ *
+ * calls sleep/wake
+ */
+void GPS::setWantLocation(bool on)
+{
+    if (wantNewLocation != on) {
+        wantNewLocation = on;
+        DEBUG_MSG("WANT GPS=%d\n", on);
+        if (on)
+            wake();
+        else
+            sleep();
+        }
+}
\ No newline at end of file
diff --git a/src/gps/GPS.h b/src/gps/GPS.h
index 409c6da9db..3b81b54f7e 100644
--- a/src/gps/GPS.h
+++ b/src/gps/GPS.h
@@ -30,6 +30,8 @@ class GPS
   protected:
     bool hasValidLocation = false; // default to false, until we complete our first read
 
+    bool wantNewLocation = false; // true if we want a location right now
+
   public:
     /** If !NULL we will use this serial port to construct our GPS */
     static HardwareSerial *_serial_gps;
@@ -62,10 +64,24 @@ class GPS
     /// Returns ture if we have acquired GPS lock.
     bool hasLock() const { return hasValidLocation; }
 
+    /**
+     * Switch the GPS into a mode where we are actively looking for a lock, or alternatively switch GPS into a low power mode
+     * 
+     * calls sleep/wake
+     */
+    void setWantLocation(bool on);
+
     /**
      * Restart our lock attempt - try to get and broadcast a GPS reading ASAP
      * called after the CPU wakes from light-sleep state */
     virtual void startLock() {}
+
+protected:
+  /// If possible force the GPS into sleep/low power mode
+  virtual void sleep() {}
+
+  /// wake the GPS into normal operation mode
+  virtual void wake() {}
 };
 
 extern GPS *gps;
diff --git a/src/gps/NMEAGPS.cpp b/src/gps/NMEAGPS.cpp
index 08918d6d85..2d8af6d72a 100644
--- a/src/gps/NMEAGPS.cpp
+++ b/src/gps/NMEAGPS.cpp
@@ -1,50 +1,6 @@
 #include "NMEAGPS.h"
 #include "configuration.h"
 
-/*
-Helpful translations from the Air530 GPS datasheet
-
-Sat acquision mode
-捕获电流值@3.3v 42.6 mA
-
-sat tracking mode
-跟踪电流值@3.3v 36.7 mA
-
-Low power mode
-低功耗模式@3.3V 0.85 mA
-(发送指令:$PGKC051,0)
-
-Super low power mode
-超低功耗模式@3.3V 31 uA
-(发送指令:$PGKC105,4)
-
-To exit sleep use WAKE pin
-
-Commands to enter sleep
-6、Command: 105
-进入周期性低功耗模式
-Arguments:
-
-Arg1: “0”,正常运行模式 (normal mode)
-“1”,周期超低功耗跟踪模式,需要拉高 WAKE 来唤醒 (periodic low power tracking mode - keeps sat positions, use wake to wake up)
-“2”,周期低功耗模式 (periodic low power mode)
-“4”,直接进入超低功耗跟踪模式,需要拉高 WAKE 来唤醒 (super low power consumption mode immediately, need WAKE to resume)
-“8”,自动低功耗模式,可以通过串口唤醒 (automatic low power mode, wake by sending characters to serial port)
-“9”, 自动超低功耗跟踪模式,需要拉高 WAKE 来唤醒 (automatic low power tracking when possible, need wake pin to resume)
-
-(Arg 2 & 3 only valid if Arg1 is "1" or "2")
-Arg2:运行时间(毫秒),在 Arg1 为 1、2 的周期模式下,此参数起作用
-ON time in msecs
-
-Arg3:睡眠时间(毫秒),在 Arg1 为 1、2 的周期模式下,此参数起作用
-Sleep time in msecs
-
-Example:
-$PGKC105,8*3F<CR><LF>
-This will set automatic low power mode with waking when we send chars to the serial port.  Possibly do this as soon as we get a new 
-location.  When we wake again in a minute we send a character to wake up.
-
-*/
 
 static int32_t toDegInt(RawDegrees d)
 {
@@ -68,6 +24,7 @@ bool NMEAGPS::setup()
 
 void NMEAGPS::loop()
 {
+    // First consume any chars that have piled up at the receiver
     while (_serial_gps->available() > 0) {
         int c = _serial_gps->read();
         // DEBUG_MSG("%c", c);
@@ -78,11 +35,18 @@ void NMEAGPS::loop()
             isConnected = true;
     }
 
+    // If we are overdue for an update, turn on the GPS and at least publish the current status
     uint32_t now = millis();
-    if ((now - lastUpdateMsec) > 20 * 1000) { // Ugly hack for now - limit update checks to once every 20 secs (but still consume
-                                              // serial chars at whatever rate)
-        lastUpdateMsec = now;
+    bool mustPublishUpdate = false;
+    if ((now - lastUpdateMsec) > 30 * 1000 && !wantNewLocation) {
+        // Ugly hack for now - limit update checks to once every 30 secs
+        setWantLocation(true);
+        mustPublishUpdate =
+            true; // Even if we don't have an update this time, we at least want to occasionally publish the current state
+    }
 
+    // Only bother looking at GPS state if we are interested in what it has to say
+    if (wantNewLocation) {
         auto ti = reader.time;
         auto d = reader.date;
         if (ti.isUpdated() && ti.isValid() && d.isValid()) {
@@ -105,6 +69,8 @@ void NMEAGPS::loop()
         hasValidLocation = ((fixtype >= 1) && (fixtype <= 5));
 
         if (reader.location.isUpdated()) {
+            lastUpdateMsec = now;
+
             if (reader.altitude.isValid())
                 altitude = reader.altitude.meters();
 
@@ -112,6 +78,9 @@ void NMEAGPS::loop()
                 auto loc = reader.location.value();
                 latitude = toDegInt(loc.lat);
                 longitude = toDegInt(loc.lng);
+
+                // Once we get a location we no longer desperately want an update
+                setWantLocation(false);
             }
             // Diminution of precision (an accuracy metric) is reported in 10^2 units, so we need to scale down when we use it
             if (reader.hdop.isValid()) {
@@ -128,11 +97,14 @@ void NMEAGPS::loop()
             // expect gps pos lat=37.520825, lon=-122.309162, alt=158
             DEBUG_MSG("new NMEA GPS pos lat=%f, lon=%f, alt=%d, hdop=%g, heading=%f\n", latitude * 1e-7, longitude * 1e-7,
                       altitude, dop * 1e-2, heading * 1e-5);
+            mustPublishUpdate = true;
         }
 
-        // Notify any status instances that are observing us
-        const meshtastic::GPSStatus status =
-            meshtastic::GPSStatus(hasLock(), isConnected, latitude, longitude, altitude, dop, heading, numSatellites);
-        newStatus.notifyObservers(&status);
+        if (mustPublishUpdate) {
+            // Notify any status instances that are observing us
+            const meshtastic::GPSStatus status =
+                meshtastic::GPSStatus(hasLock(), isConnected, latitude, longitude, altitude, dop, heading, numSatellites);
+            newStatus.notifyObservers(&status);
+        }
     }
 }
\ No newline at end of file
diff --git a/src/gps/UBloxGPS.cpp b/src/gps/UBloxGPS.cpp
index 93e8a01cfe..0d133891e2 100644
--- a/src/gps/UBloxGPS.cpp
+++ b/src/gps/UBloxGPS.cpp
@@ -183,11 +183,11 @@ void UBloxGPS::doTask()
         if ((fixtype >= 3 && fixtype <= 4) && ublox.getP(maxWait)) // rd fixes only
         {
             if (hasValidLocation) {
-                wantNewLocation = false;
+                setWantLocation(false);
                 // ublox.powerOff();
             }
         } else // we didn't get a location update, go back to sleep and hope the characters show up
-            wantNewLocation = true;
+            setWantLocation(true);
 
         // Notify any status instances that are observing us
         const meshtastic::GPSStatus status =
diff --git a/src/gps/UBloxGPS.h b/src/gps/UBloxGPS.h
index 7a2d3cdba3..03f2d2a1c0 100644
--- a/src/gps/UBloxGPS.h
+++ b/src/gps/UBloxGPS.h
@@ -14,8 +14,6 @@ class UBloxGPS : public GPS, public concurrency::PeriodicTask
 {
     SFE_UBLOX_GPS ublox;
 
-    bool wantNewLocation = true;
-
     CallbackObserver<UBloxGPS, void *> notifySleepObserver = CallbackObserver<UBloxGPS, void *>(this, &UBloxGPS::prepareSleep);
 
   public:
diff --git a/src/graphics/EInkDisplay.cpp b/src/graphics/EInkDisplay.cpp
index 56363c1929..7a6e02df0d 100644
--- a/src/graphics/EInkDisplay.cpp
+++ b/src/graphics/EInkDisplay.cpp
@@ -62,7 +62,7 @@ void EInkDisplay::display(void)
     uint32_t now = millis();
     uint32_t sinceLast = now - lastDrawMsec;
 
-    if (framePtr && (sinceLast > 30 * 1000 || lastDrawMsec == 0)) {
+    if (framePtr && (sinceLast > 60 * 1000 || lastDrawMsec == 0)) {
         lastDrawMsec = now;
 
         // FIXME - only draw bits have changed (use backbuf similar to the other displays)
diff --git a/src/main.cpp b/src/main.cpp
index c53fdfeffe..37e9077df5 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -23,7 +23,7 @@
 
 #include "MeshRadio.h"
 #include "MeshService.h"
-#include "NMEAGPS.h"
+#include "Air530GPS.h"
 #include "NodeDB.h"
 #include "PowerFSM.h"
 #include "UBloxGPS.h"
@@ -259,10 +259,14 @@ void setup()
         if (GPS::_serial_gps) {
             // Some boards might have only the TX line from the GPS connected, in that case, we can't configure it at all.  Just
             // assume NMEA at 9600 baud.
+            // dumb NMEA access only work for serial GPSes)
             DEBUG_MSG("Hoping that NMEA might work\n");
 
-            // dumb NMEA access only work for serial GPSes)
+#ifdef HAS_AIR530_GPS
+            gps = new Air530GPS();
+#else
             gps = new NMEAGPS();
+#endif
             gps->setup();
         }
     }
diff --git a/variants/eink/variant.h b/variants/eink/variant.h
index c0738746df..a399d51a7b 100644
--- a/variants/eink/variant.h
+++ b/variants/eink/variant.h
@@ -208,6 +208,8 @@ External serial flash WP25R1635FZUIL0
 #define PIN_GPS_TX (32 + 9)   // This is for bits going TOWARDS the CPU
 #define PIN_GPS_RX (32 + 8)   // This is for bits going TOWARDS the GPS
 
+#define HAS_AIR530_GPS
+
 #define PIN_SERIAL1_RX PIN_GPS_TX
 #define PIN_SERIAL1_TX PIN_GPS_RX
 

From 124a82888dbc62a3e4114b776dab5a3849a400a5 Mon Sep 17 00:00:00 2001
From: geeksville <kevinh@geeksville.com>
Date: Mon, 28 Sep 2020 17:38:36 -0700
Subject: [PATCH 08/10] add power testing notes for eink

---
 src/gps/Air530GPS.cpp   |  4 ++--
 variants/eink/variant.h | 17 ++++++++++++++++-
 2 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/src/gps/Air530GPS.cpp b/src/gps/Air530GPS.cpp
index 6223c1fc7e..db0ddd445c 100644
--- a/src/gps/Air530GPS.cpp
+++ b/src/gps/Air530GPS.cpp
@@ -75,13 +75,13 @@ void Air530GPS::sleep() {
 /// wake the GPS into normal operation mode
 void Air530GPS::wake()
 {
-#if 0
+#if 1
 #ifdef PIN_GPS_WAKE
     digitalWrite(PIN_GPS_WAKE, 1);
     pinMode(PIN_GPS_WAKE, OUTPUT);
 #endif
 #else
-    // For power testing
+    // For power testing - keep GPS sleeping forever
     sleep();
 #endif
 }
\ No newline at end of file
diff --git a/variants/eink/variant.h b/variants/eink/variant.h
index a399d51a7b..1dd2e9dc2a 100644
--- a/variants/eink/variant.h
+++ b/variants/eink/variant.h
@@ -53,7 +53,8 @@ feedback to give:
 
 * remove ipx connector for nfc, instead use two caps and loop traces on the back of the board as an antenna?
 
-* the i2c RTC seems to talk fine on the i2c bus.  However, I'm not sure of the utility of that part.  Instead I'd be in favor of the following:
+* the i2c RTC seems to talk fine on the i2c bus.  However, I'm not sure of the utility of that part.  Instead I'd be in favor of
+the following:
 
 * move BAT1 to power the GPS VBACKUP instead per page 6 of the Air530 datasheet.  And remove the i2c RTC entirely.
 
@@ -65,6 +66,20 @@ This would allow using 4 bit wide interface mode to the serial flash - doubling
 https://infocenter.nordicsemi.com/topic/ug_nrf52840_dk/UG/nrf52840_DK/hw_external_memory.html?cp=4_0_4_7_4
 Once again - I'm glad you added that external flash chip.
 
+* Power measurements
+When powered by 4V battery
+
+CPU on, lora radio RX mode, bluetooth enabled, GPS trying to lock.  total draw 43mA
+CPU on, lora radio RX mode, bluetooth enabled, GPS super low power sleep mode.  Total draw 20mA
+CPU on, lora radio TX mode, bluetooth enabled, GPS super low power sleep mode.  Total draw 132mA
+
+Note: power consumption while connected via BLE to a phone almost identical.
+
+Note: eink display for all tests was in sleep mode most of the time.  Current draw during the brief periods while the eink was being drawn was not
+measured (but it was low).
+
+Note: Turning off EINK PWR_ON produces no noticeable power savings over just putting the eink display into sleep mode.
+
 */
 
 /*----------------------------------------------------------------------------

From 7f3217d69e0939e15ad36d486439c027a98af280 Mon Sep 17 00:00:00 2001
From: geeksville <kevinh@geeksville.com>
Date: Tue, 29 Sep 2020 14:12:26 -0700
Subject: [PATCH 09/10] update image build script

---
 bin/install-bootloader.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/bin/install-bootloader.sh b/bin/install-bootloader.sh
index 842a64bc31..5dde70505b 100755
--- a/bin/install-bootloader.sh
+++ b/bin/install-bootloader.sh
@@ -14,7 +14,7 @@ echo "01 00 00 00 00 00 00 00" | xxd -r -p - >/tmp/bootconf.bin
 srec_cat /tmp/bootconf.bin -binary -offset 0xff000 -output /tmp/bootconf.hex -intel   
 
 echo Generating merged hex file 
-mergehex -m $BOOTDIR/_build/build-ttgo_eink/ttgo_eink_bootloader-0.3.2-123-g4f9022d-dirty_s140_6.1.1.hex .pio/build/eink/firmware.hex /tmp/bootconf.hex -o ttgo_eink_full.hex
+mergehex -m $BOOTDIR/_build/build-ttgo_eink/ttgo_eink_bootloader-0.3.2-124-g69bd8eb-dirty_s140_6.1.1.hex .pio/build/eink/firmware.hex /tmp/bootconf.hex -o ttgo_eink_full.hex
 
 echo Telling bootloader app region is valid and telling CPU to run
 nrfjprog --program ttgo_eink_full.hex -f nrf52 --reset

From f7ffd196e338752d27865505d576f3034ebb16f5 Mon Sep 17 00:00:00 2001
From: Stefan Venz <stefan.venz@protonmail.com>
Date: Thu, 1 Oct 2020 11:22:41 +0200
Subject: [PATCH 10/10] Fix update/install instructions

---
 README.md | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/README.md b/README.md
index 6017774620..6663c4d27b 100644
--- a/README.md
+++ b/README.md
@@ -103,10 +103,10 @@ Hard resetting via RTS pin...
 ```
 
 5. cd into the directory where the release zip file was expanded.
-6. Install the correct firmware for your board with `device-install.sh firmware-_board_-_country_.bin`.
-   - Example: `./device-install.sh firmware-HELTEC-US-0.0.3.bin`.
-7. To update run `device-update.sh firmware-_board_-_country_.bin`
-   - Example: `./device-update.sh firmware-HELTEC-US-0.0.3.bin`.
+6. Install the correct firmware for your board with `device-install.sh -f firmware-_board_-_country_.bin`.
+   - Example: `./device-install.sh -f firmware-HELTEC-US-0.0.3.bin`.
+7. To update run `device-update.sh -f firmware-_board_-_country_.bin`
+   - Example: `./device-update.sh -f firmware-HELTEC-US-0.0.3.bin`.
 
 Note: If you have previously installed meshtastic, you don't need to run this full script instead just run `esptool.py --baud 921600 write_flash 0x10000 firmware-_board_-_country_-_version_.bin`. This will be faster, also all of your current preferences will be preserved.