follow up to #261

- fix button pullup
- flash using teensy_loader_cli
- update boards.md

hw/bsp/teensy_40/board.mk

@@ -48,6 +48,7 @@ FREERTOS_PORT = ARM_CM7
 JLINK_DEVICE = MIMXRT1062xxx6A
 JLINK_IF = swd
 
-# flash by copying bin file to DAP Mass Storage
-flash: $(BUILD)/$(BOARD)-firmware.bin
-	cp $< /media/$(USER)/RT1060-EVK/
+# flash by using teensy_loader_cli https://github.com/PaulStoffregen/teensy_loader_cli
+# Make sure it is in your PATH 
+flash: $(BUILD)/$(BOARD)-firmware.hex
+	teensy_loader_cli --mcu=imxrt1062 -v -w $<

hw/bsp/teensy_40/teensy40.c

@@ -78,7 +78,8 @@ void board_init(void)
 
   // Button
   IOMUXC_SetPinMux( BUTTON_PINMUX, 0U);
-  gpio_pin_config_t button_config = { kGPIO_DigitalInput, 0, kGPIO_IntRisingEdge, };
+  IOMUXC_SetPinConfig(BUTTON_PINMUX, 0x01B0A0U);
+  gpio_pin_config_t button_config = { kGPIO_DigitalInput, 0, kGPIO_NoIntmode };
   GPIO_PinInit(BUTTON_PORT, BUTTON_PIN, &button_config);
 
   // UART