fixed can VDD pullup issue for Babel, updated changelog (#6)

Zubax · Nov 14, 2022 · 0f1e4af · 0f1e4af
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diff --git a/README.md b/README.md
@@ -39,6 +39,10 @@ This algoritm is employed in the SLCAN backend in [PyUAVCAN library](http://uavc
 
 ### Change Log
 
+### V1.4
+
+* Fix a hardware compatibility problem for Babel: disable the built-in pull-up resistor on the CAN power disable line.
+
 #### v1.3
 
 * Fix a hardware compatibility problem for Babel-Babel:

diff --git a/bootloader/src/sys/board.h b/bootloader/src/sys/board.h
@@ -162,7 +162,7 @@
                                      PIN_PUPDR_PULLDOWN(GPIOA_PIN_5) |\
                                      PIN_PUPDR_PULLDOWN(GPIOA_PIN_6) |\
                                      PIN_PUPDR_PULLDOWN(7) |\
-                                     PIN_PUPDR_PULLUP(GPIOA_CAN_POWER_DIS) |\
+                                     PIN_PUPDR_FLOATING(GPIOA_CAN_POWER_DIS) |\
                                      PIN_PUPDR_FLOATING(GPIOA_UART1_TX) |\
                                      PIN_PUPDR_PULLUP(GPIOA_UART1_RX) |\
                                      PIN_PUPDR_FLOATING(GPIOA_USB_DM) |\

diff --git a/firmware/Makefile b/firmware/Makefile
@@ -21,7 +21,7 @@ PROJECT = com.zubax.babel
 
 HW_VERSION_MAJOR = 1
 FW_VERSION_MAJOR = 1
-FW_VERSION_MINOR = 3
+FW_VERSION_MINOR = 4
 
 #
 # Application