remove duplicate from merge

Added OsX arm install, updated FIDO2 test site links

docs/solo/building.md

@@ -32,7 +32,7 @@ Source code can be downloaded from:
 -   from python programs [repository](https://pypi.org/project/solo-python/) `pip install solo-python`
 -   from installing prerequisites `pip3 install -r tools/requirements.txt`
 -   github repository: [repository](https://github.com/solokeys/solo-python)
--   installation python enviroment witn command `make venv` from root directory of source code
+-   installation python enviroment with command `make venv` from root directory of source code
 
 ## Compilation
 

docs/solo/nucleo32-board.md

@@ -66,7 +66,7 @@ Environment: Fedora 29 x64, Linux 4.19.9
 
 See <https://docs.solokeys.io/solo/building/> for the original guide. Here details not included there will be covered.
 
-### Install ARM tools
+### Install ARM tools Linux
 
 1.  Download current [ARM tools] package: [gcc-arm-none-eabi-8-2018-q4-major-linux.tar.bz2].
 
@@ -75,6 +75,13 @@ See <https://docs.solokeys.io/solo/building/> for the original guide. Here detai
 3.  Add full path to the `./bin` directory as first entry to the `$PATH` variable,
     as in `~/gcc-arm/gcc-arm-none-eabi-8-2018-q4-major/bin/:$PATH`.
 
+### Install ARM tools OsX using brew package manager
+
+```bash
+brew tap ArmMbed/homebrew-formulae
+brew install arm-none-eabi-gcc
+```
+
 ### Install flashing software
 
 ST provides a CLI flashing tool - `STM32_Programmer_CLI`. It can be downloaded directly from the vendor's site:
@@ -114,8 +121,8 @@ Do not use it, if you do not plan to do so.
 ```bash
 # while in the main project directory
 # create Python virtual environment with required packages, and activate
-make env3
-. env3/bin/activate
+make venv
+. venv/bin/activate
 # Run flashing
 cd ./targets/stm32l432
 make flash
@@ -178,8 +185,8 @@ make fido2-test
 
 #### FIDO2 test sites
 
-1.  <https://webauthn.bin.coffee/>
-2.  <https://github.com/apowers313/fido2-server-demo/>
+1.  <https://www.passwordless.dev/overview>
+2.  <https://webauthn.bin.coffee/>
 3.  <https://webauthn.org/>
 
 #### U2F test sites

targets/stm32l432/build/common.mk

@@ -6,7 +6,7 @@ AR=$(PREFIX)arm-none-eabi-ar
 DRIVER_LIBS := lib/stm32l4xx_hal_pcd.c lib/stm32l4xx_hal_pcd_ex.c lib/stm32l4xx_ll_gpio.c  \
        lib/stm32l4xx_ll_rcc.c lib/stm32l4xx_ll_rng.c lib/stm32l4xx_ll_tim.c  \
 	   lib/stm32l4xx_ll_usb.c lib/stm32l4xx_ll_utils.c lib/stm32l4xx_ll_pwr.c \
-	   lib/stm32l4xx_ll_usart.c lib/stm32l4xx_ll_spi.c
+	   lib/stm32l4xx_ll_usart.c lib/stm32l4xx_ll_spi.c lib/stm32l4xx_ll_exti.c
 
 USB_LIB := lib/usbd/usbd_cdc.c lib/usbd/usbd_cdc_if.c lib/usbd/usbd_composite.c \
 	   lib/usbd/usbd_conf.c lib/usbd/usbd_core.c lib/usbd/usbd_ioreq.c \

targets/stm32l432/lib/stm32l4xx_ll_exti.c

@@ -0,0 +1,290 @@
+/**
+  ******************************************************************************
+  * @file    stm32l4xx_ll_exti.c
+  * @author  MCD Application Team
+  * @brief   EXTI LL module driver.
+  ******************************************************************************
+  * @attention
+  *
+  * <h2><center>&copy; Copyright (c) 2017 STMicroelectronics.
+  * All rights reserved.</center></h2>
+  *
+  * This software component is licensed by ST under BSD 3-Clause license,
+  * the "License"; You may not use this file except in compliance with the
+  * License. You may obtain a copy of the License at:
+  *                        opensource.org/licenses/BSD-3-Clause
+  *
+  ******************************************************************************
+  */
+#if defined(USE_FULL_LL_DRIVER)
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32l4xx_ll_exti.h"
+#ifdef  USE_FULL_ASSERT
+#include "stm32_assert.h"
+#else
+#define assert_param(expr) ((void)0U)
+#endif
+
+/** @addtogroup STM32L4xx_LL_Driver
+  * @{
+  */
+
+#if defined (EXTI)
+
+/** @defgroup EXTI_LL EXTI
+  * @{
+  */
+
+/* Private types -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+/* Private constants ---------------------------------------------------------*/
+/* Private macros ------------------------------------------------------------*/
+/** @addtogroup EXTI_LL_Private_Macros
+  * @{
+  */
+
+#define IS_LL_EXTI_LINE_0_31(__VALUE__)              (((__VALUE__) & ~LL_EXTI_LINE_ALL_0_31) == 0x00000000U)
+#define IS_LL_EXTI_LINE_32_63(__VALUE__)             (((__VALUE__) & ~LL_EXTI_LINE_ALL_32_63) == 0x00000000U)
+
+#define IS_LL_EXTI_MODE(__VALUE__)                   (((__VALUE__) == LL_EXTI_MODE_IT)            \
+                                                   || ((__VALUE__) == LL_EXTI_MODE_EVENT)         \
+                                                   || ((__VALUE__) == LL_EXTI_MODE_IT_EVENT))
+
+
+#define IS_LL_EXTI_TRIGGER(__VALUE__)                (((__VALUE__) == LL_EXTI_TRIGGER_NONE)       \
+                                                   || ((__VALUE__) == LL_EXTI_TRIGGER_RISING)     \
+                                                   || ((__VALUE__) == LL_EXTI_TRIGGER_FALLING)    \
+                                                   || ((__VALUE__) == LL_EXTI_TRIGGER_RISING_FALLING))
+
+/**
+  * @}
+  */
+
+/* Private function prototypes -----------------------------------------------*/
+
+/* Exported functions --------------------------------------------------------*/
+/** @addtogroup EXTI_LL_Exported_Functions
+  * @{
+  */
+
+/** @addtogroup EXTI_LL_EF_Init
+  * @{
+  */
+
+/**
+  * @brief  De-initialize the EXTI registers to their default reset values.
+  * @retval An ErrorStatus enumeration value:
+  *          - 0x00: EXTI registers are de-initialized
+  */
+uint32_t LL_EXTI_DeInit(void)
+{
+  /* Interrupt mask register set to default reset values */
+  LL_EXTI_WriteReg(IMR1,   0xFF820000U);
+  /* Event mask register set to default reset values */
+  LL_EXTI_WriteReg(EMR1,   0x00000000U);
+  /* Rising Trigger selection register set to default reset values */
+  LL_EXTI_WriteReg(RTSR1,  0x00000000U);
+  /* Falling Trigger selection register set to default reset values */
+  LL_EXTI_WriteReg(FTSR1,  0x00000000U);
+  /* Software interrupt event register set to default reset values */
+  LL_EXTI_WriteReg(SWIER1, 0x00000000U);
+  /* Pending register clear */
+  LL_EXTI_WriteReg(PR1,    0x007DFFFFU);
+
+  /* Interrupt mask register 2 set to default reset values */
+#if defined(LL_EXTI_LINE_40)
+  LL_EXTI_WriteReg(IMR2,        0x00000187U);
+#else
+  LL_EXTI_WriteReg(IMR2,        0x00000087U);
+#endif
+  /* Event mask register 2 set to default reset values */
+  LL_EXTI_WriteReg(EMR2,        0x00000000U);
+  /* Rising Trigger selection register 2 set to default reset values */
+  LL_EXTI_WriteReg(RTSR2,       0x00000000U);
+  /* Falling Trigger selection register 2 set to default reset values */
+  LL_EXTI_WriteReg(FTSR2,       0x00000000U);
+  /* Software interrupt event register 2 set to default reset values */
+  LL_EXTI_WriteReg(SWIER2,      0x00000000U);
+  /* Pending register 2 clear */
+  LL_EXTI_WriteReg(PR2,         0x00000078U);
+
+  return 0x00u;
+}
+
+/**
+  * @brief  Initialize the EXTI registers according to the specified parameters in EXTI_InitStruct.
+  * @param  EXTI_InitStruct pointer to a @ref LL_EXTI_InitTypeDef structure.
+  * @retval An ErrorStatus enumeration value:
+  *          - 0x00: EXTI registers are initialized
+  *          - any other calue : wrong configuration
+  */
+uint32_t LL_EXTI_Init(LL_EXTI_InitTypeDef *EXTI_InitStruct)
+{
+  uint32_t status = 0x00u;
+
+  /* Check the parameters */
+  assert_param(IS_LL_EXTI_LINE_0_31(EXTI_InitStruct->Line_0_31));
+  assert_param(IS_LL_EXTI_LINE_32_63(EXTI_InitStruct->Line_32_63));
+  assert_param(IS_FUNCTIONAL_STATE(EXTI_InitStruct->LineCommand));
+  assert_param(IS_LL_EXTI_MODE(EXTI_InitStruct->Mode));
+
+  /* ENABLE LineCommand */
+  if (EXTI_InitStruct->LineCommand != DISABLE)
+  {
+    assert_param(IS_LL_EXTI_TRIGGER(EXTI_InitStruct->Trigger));
+
+    /* Configure EXTI Lines in range from 0 to 31 */
+    if (EXTI_InitStruct->Line_0_31 != LL_EXTI_LINE_NONE)
+    {
+      switch (EXTI_InitStruct->Mode)
+      {
+        case LL_EXTI_MODE_IT:
+          /* First Disable Event on provided Lines */
+          LL_EXTI_DisableEvent_0_31(EXTI_InitStruct->Line_0_31);
+          /* Then Enable IT on provided Lines */
+          LL_EXTI_EnableIT_0_31(EXTI_InitStruct->Line_0_31);
+          break;
+        case LL_EXTI_MODE_EVENT:
+          /* First Disable IT on provided Lines */
+          LL_EXTI_DisableIT_0_31(EXTI_InitStruct->Line_0_31);
+          /* Then Enable Event on provided Lines */
+          LL_EXTI_EnableEvent_0_31(EXTI_InitStruct->Line_0_31);
+          break;
+        case LL_EXTI_MODE_IT_EVENT:
+          /* Directly Enable IT & Event on provided Lines */
+          LL_EXTI_EnableIT_0_31(EXTI_InitStruct->Line_0_31);
+          LL_EXTI_EnableEvent_0_31(EXTI_InitStruct->Line_0_31);
+          break;
+        default:
+          status = 0x01u;
+          break;
+      }
+      if (EXTI_InitStruct->Trigger != LL_EXTI_TRIGGER_NONE)
+      {
+        switch (EXTI_InitStruct->Trigger)
+        {
+          case LL_EXTI_TRIGGER_RISING:
+            /* First Disable Falling Trigger on provided Lines */
+            LL_EXTI_DisableFallingTrig_0_31(EXTI_InitStruct->Line_0_31);
+            /* Then Enable Rising Trigger on provided Lines */
+            LL_EXTI_EnableRisingTrig_0_31(EXTI_InitStruct->Line_0_31);
+            break;
+          case LL_EXTI_TRIGGER_FALLING:
+            /* First Disable Rising Trigger on provided Lines */
+            LL_EXTI_DisableRisingTrig_0_31(EXTI_InitStruct->Line_0_31);
+            /* Then Enable Falling Trigger on provided Lines */
+            LL_EXTI_EnableFallingTrig_0_31(EXTI_InitStruct->Line_0_31);
+            break;
+          case LL_EXTI_TRIGGER_RISING_FALLING:
+            LL_EXTI_EnableRisingTrig_0_31(EXTI_InitStruct->Line_0_31);
+            LL_EXTI_EnableFallingTrig_0_31(EXTI_InitStruct->Line_0_31);
+            break;
+          default:
+            status |= 0x02u;
+            break;
+        }
+      }
+    }
+    /* Configure EXTI Lines in range from 32 to 63 */
+    if (EXTI_InitStruct->Line_32_63 != LL_EXTI_LINE_NONE)
+    {
+      switch (EXTI_InitStruct->Mode)
+      {
+        case LL_EXTI_MODE_IT:
+          /* First Disable Event on provided Lines */
+          LL_EXTI_DisableEvent_32_63(EXTI_InitStruct->Line_32_63);
+          /* Then Enable IT on provided Lines */
+          LL_EXTI_EnableIT_32_63(EXTI_InitStruct->Line_32_63);
+          break;
+        case LL_EXTI_MODE_EVENT:
+          /* First Disable IT on provided Lines */
+          LL_EXTI_DisableIT_32_63(EXTI_InitStruct->Line_32_63);
+          /* Then Enable Event on provided Lines */
+          LL_EXTI_EnableEvent_32_63(EXTI_InitStruct->Line_32_63);
+          break;
+        case LL_EXTI_MODE_IT_EVENT:
+          /* Directly Enable IT & Event on provided Lines */
+          LL_EXTI_EnableIT_32_63(EXTI_InitStruct->Line_32_63);
+          LL_EXTI_EnableEvent_32_63(EXTI_InitStruct->Line_32_63);
+          break;
+        default:
+          status |= 0x04u;
+          break;
+      }
+      if (EXTI_InitStruct->Trigger != LL_EXTI_TRIGGER_NONE)
+      {
+        switch (EXTI_InitStruct->Trigger)
+        {
+          case LL_EXTI_TRIGGER_RISING:
+            /* First Disable Falling Trigger on provided Lines */
+            LL_EXTI_DisableFallingTrig_32_63(EXTI_InitStruct->Line_32_63);
+            /* Then Enable IT on provided Lines */
+            LL_EXTI_EnableRisingTrig_32_63(EXTI_InitStruct->Line_32_63);
+            break;
+          case LL_EXTI_TRIGGER_FALLING:
+            /* First Disable Rising Trigger on provided Lines */
+            LL_EXTI_DisableRisingTrig_32_63(EXTI_InitStruct->Line_32_63);
+            /* Then Enable Falling Trigger on provided Lines */
+            LL_EXTI_EnableFallingTrig_32_63(EXTI_InitStruct->Line_32_63);
+            break;
+          case LL_EXTI_TRIGGER_RISING_FALLING:
+            LL_EXTI_EnableRisingTrig_32_63(EXTI_InitStruct->Line_32_63);
+            LL_EXTI_EnableFallingTrig_32_63(EXTI_InitStruct->Line_32_63);
+            break;
+          default:
+            status = ERROR;
+            break;
+        }
+      }
+    }
+  }
+  /* DISABLE LineCommand */
+  else
+  {
+    /* De-configure EXTI Lines in range from 0 to 31 */
+    LL_EXTI_DisableIT_0_31(EXTI_InitStruct->Line_0_31);
+    LL_EXTI_DisableEvent_0_31(EXTI_InitStruct->Line_0_31);
+    /* De-configure EXTI Lines in range from 32 to 63 */
+    LL_EXTI_DisableIT_32_63(EXTI_InitStruct->Line_32_63);
+    LL_EXTI_DisableEvent_32_63(EXTI_InitStruct->Line_32_63);
+  }
+
+  return status;
+}
+
+/**
+  * @brief  Set each @ref LL_EXTI_InitTypeDef field to default value.
+  * @param  EXTI_InitStruct Pointer to a @ref LL_EXTI_InitTypeDef structure.
+  * @retval None
+  */
+void LL_EXTI_StructInit(LL_EXTI_InitTypeDef *EXTI_InitStruct)
+{
+  EXTI_InitStruct->Line_0_31      = LL_EXTI_LINE_NONE;
+  EXTI_InitStruct->Line_32_63     = LL_EXTI_LINE_NONE;
+  EXTI_InitStruct->LineCommand    = DISABLE;
+  EXTI_InitStruct->Mode           = LL_EXTI_MODE_IT;
+  EXTI_InitStruct->Trigger        = LL_EXTI_TRIGGER_FALLING;
+}
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+#endif /* defined (EXTI) */
+
+/**
+  * @}
+  */
+
+#endif /* USE_FULL_LL_DRIVER */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

targets/stm32l432/lib/usbd/usbd_composite.c

@@ -26,151 +26,173 @@ static uint8_t *USBD_Composite_GetOtherSpeedCfgDesc (uint16_t *length);
 
 static uint8_t *USBD_Composite_GetDeviceQualifierDescriptor (uint16_t *length);
 
-#define NUM_INTERFACES                      2
+#define NUM_CLASSES                         2
+#define NUM_INTERFACES                      3
 
 #if NUM_INTERFACES>1
-#define COMPOSITE_CDC_HID_DESCRIPTOR_SIZE   (90)
+#define COMPOSITE_CDC_HID_DESCRIPTOR_SIZE   (90 + 8+9 + 4)
 #else
 #define COMPOSITE_CDC_HID_DESCRIPTOR_SIZE   (41)
 #endif
 
-#define HID_INTF_NUM                        0
-#define CDC_INTF_NUM                        1
+#define HID_INTF_NUM                                0
+#define CDC_MASTER_INTF_NUM                         1
+#define CDC_SLAVE_INTF_NUM 2
 __ALIGN_BEGIN uint8_t COMPOSITE_CDC_HID_DESCRIPTOR[COMPOSITE_CDC_HID_DESCRIPTOR_SIZE] __ALIGN_END =
-  {
-  /*Configuration Descriptor*/
-  0x09,   /* bLength: Configuration Descriptor size */
-  USB_DESC_TYPE_CONFIGURATION,      /* bDescriptorType: Configuration */
-  COMPOSITE_CDC_HID_DESCRIPTOR_SIZE,                /* wTotalLength:no of returned bytes */
-  0x00,
-  NUM_INTERFACES,   /* bNumInterfaces: 1 interface */
-  0x01,   /* bConfigurationValue: Configuration value */
-  0x00,   /* iConfiguration: Index of string descriptor describing the configuration */
-  0x80,   /* bmAttributes: self powered */
-  0x32,   /* MaxPower 100 mA */
+    {
+        /*Configuration Descriptor*/
+        0x09,                              /* bLength: Configuration Descriptor size */
+        USB_DESC_TYPE_CONFIGURATION,       /* bDescriptorType: Configuration */
+        COMPOSITE_CDC_HID_DESCRIPTOR_SIZE, /* wTotalLength:no of returned bytes */
+        0x00,
+        NUM_INTERFACES, /* bNumInterfaces */
+        0x01,           /* bConfigurationValue: Configuration value */
+        0x00,           /* iConfiguration: Index of string descriptor describing the configuration */
+        0x80,           /* bmAttributes: self powered */
+        0x32,           /* MaxPower 100 mA */
 
-  /*---------------------------------------------------------------------------*/
+        /*---------------------------------------------------------------------------*/
 
-  /*     */
-  /* HID */
-  /*     */
+        /*     */
+        /* HID */
+        /*     */
 
-  /************** Descriptor of Joystick Mouse interface ****************/
-  0x09,         /*bLength: Interface Descriptor size*/
-  USB_DESC_TYPE_INTERFACE,/*bDescriptorType: Interface descriptor type*/
-  HID_INTF_NUM,         /*bInterfaceNumber: Number of Interface*/
-  0x00,         /*bAlternateSetting: Alternate setting*/
-  0x02,         /*bNumEndpoints*/
-  0x03,         /*bInterfaceClass: HID*/
-  0x00,         /*bInterfaceSubClass : 1=BOOT, 0=no boot*/
-  0x00,         /*nInterfaceProtocol : 0=none, 1=keyboard, 2=mouse*/
-  2,            /*iInterface: Index of string descriptor*/
-  /******************** Descriptor of Joystick Mouse HID ********************/
-  0x09,         /*bLength: HID Descriptor size*/
-  HID_DESCRIPTOR_TYPE, /*bDescriptorType: HID*/
-  0x11,         /*bcdHID: HID Class Spec release number*/
-  0x01,
-  0x00,         /*bCountryCode: Hardware target country*/
-  0x01,         /*bNumDescriptors: Number of HID class descriptors to follow*/
-  0x22,         /*bDescriptorType*/
-  HID_FIDO_REPORT_DESC_SIZE,/*wItemLength: Total length of Report descriptor*/
-  0,
-  /******************** Descriptor of Mouse endpoint ********************/
-  0x07,          /*bLength: Endpoint Descriptor size*/
-  USB_DESC_TYPE_ENDPOINT, /*bDescriptorType:*/
-  HID_EPIN_ADDR,     /*bEndpointAddress: Endpoint Address (IN)*/
-  0x03,          /*bmAttributes: Interrupt endpoint*/
-  HID_EPIN_SIZE, /*wMaxPacketSize: 4 Byte max */
-  0x00,
-  HID_BINTERVAL,          /*bInterval: Polling Interval */
+        /************** Descriptor of Joystick Mouse interface ****************/
+        0x09,                    /*bLength: Interface Descriptor size*/
+        USB_DESC_TYPE_INTERFACE, /*bDescriptorType: Interface descriptor type*/
+        HID_INTF_NUM,            /*bInterfaceNumber: Number of Interface*/
+        0x00,                    /*bAlternateSetting: Alternate setting*/
+        0x02,                    /*bNumEndpoints*/
+        0x03,                    /*bInterfaceClass: HID*/
+        0x00,                    /*bInterfaceSubClass : 1=BOOT, 0=no boot*/
+        0x00,                    /*nInterfaceProtocol : 0=none, 1=keyboard, 2=mouse*/
+        2,                       /*iInterface: Index of string descriptor*/
+        /******************** Descriptor of Joystick Mouse HID ********************/
+        0x09,                /*bLength: HID Descriptor size*/
+        HID_DESCRIPTOR_TYPE, /*bDescriptorType: HID*/
+        0x11,                /*bcdHID: HID Class Spec release number*/
+        0x01,
+        0x00,                      /*bCountryCode: Hardware target country*/
+        0x01,                      /*bNumDescriptors: Number of HID class descriptors to follow*/
+        0x22,                      /*bDescriptorType*/
+        HID_FIDO_REPORT_DESC_SIZE, /*wItemLength: Total length of Report descriptor*/
+        0,
+        /******************** Descriptor of Mouse endpoint ********************/
+        0x07,                   /*bLength: Endpoint Descriptor size*/
+        USB_DESC_TYPE_ENDPOINT, /*bDescriptorType:*/
+        HID_EPIN_ADDR,          /*bEndpointAddress: Endpoint Address (IN)*/
+        0x03,                   /*bmAttributes: Interrupt endpoint*/
+        HID_EPIN_SIZE,          /*wMaxPacketSize: 4 Byte max */
+        0x00,
+        HID_BINTERVAL, /*bInterval: Polling Interval */
 
-  0x07,          /*bLength: Endpoint Descriptor size*/
-  USB_DESC_TYPE_ENDPOINT, /*bDescriptorType:*/
-  HID_EPOUT_ADDR,     /*bEndpointAddress: Endpoint Address (IN)*/
-  0x03,          /*bmAttributes: Interrupt endpoint*/
-  HID_EPOUT_SIZE, /*wMaxPacketSize: 4 Byte max */
-  0x00,
-  HID_BINTERVAL,          /*bInterval: Polling Interval */
+        0x07,                   /*bLength: Endpoint Descriptor size*/
+        USB_DESC_TYPE_ENDPOINT, /*bDescriptorType:*/
+        HID_EPOUT_ADDR,         /*bEndpointAddress: Endpoint Address (IN)*/
+        0x03,                   /*bmAttributes: Interrupt endpoint*/
+        HID_EPOUT_SIZE,         /*wMaxPacketSize: 4 Byte max */
+        0x00,
+        HID_BINTERVAL, /*bInterval: Polling Interval */
 
+#if NUM_INTERFACES > 1
 
+        /*     */
+        /* CDC */
+        /*     */
+        // This "IAD" is needed for Windows since it ignores the standard Union Functional Descriptor
+        0x08,                // bLength
+        0x0B,                // IAD type
+        CDC_MASTER_INTF_NUM, // First interface
+        CDC_SLAVE_INTF_NUM,  // Next interface
+        0x02,                // bInterfaceClass of the first interface
+        0x02,                // bInterfaceSubClass of the first interface
+        0x00,                // bInterfaceProtocol of the first interface
+        0x00,                // Interface string index
 
-#if NUM_INTERFACES>1
+        /*Interface Descriptor */
+        0x09,                      /* bLength: Interface Descriptor size */
+        USB_DESC_TYPE_INTERFACE,   /* bDescriptorType: Interface */
+                                   /* Interface descriptor type */
+        /*!*/ CDC_MASTER_INTF_NUM, /* bInterfaceNumber: Number of Interface */
+        0x00,                      /* bAlternateSetting: Alternate setting */
+        0x01,                      /* bNumEndpoints: 1 endpoint used */
+        0x02,                      /* bInterfaceClass: Communication Interface Class */
+        0x02,                      /* bInterfaceSubClass: Abstract Control Model */
+        0x00,                      /* bInterfaceProtocol: Common AT commands */
+        0x00,                      /* iInterface: */
 
-    /*     */
-    /* CDC */
-    /*     */
+        /*Header Functional Descriptor*/
+        0x05, /* bLength: Endpoint Descriptor size */
+        0x24, /* bDescriptorType: CS_INTERFACE */
+        0x00, /* bDescriptorSubtype: Header Func Desc */
+        0x10, /* bcdCDC: spec release number */
+        0x01,
 
+        /*Call Management Functional Descriptor*/
+        0x05,                     /* bFunctionLength */
+        0x24,                     /* bDescriptorType: CS_INTERFACE */
+        0x01,                     /* bDescriptorSubtype: Call Management Func Desc */
+        0x00,                     /* bmCapabilities: D0+D1 */
+        /*!*/ CDC_SLAVE_INTF_NUM, /* bDataInterface: 0 */
 
-  /*Interface Descriptor */
-  0x09,   /* bLength: Interface Descriptor size */
-  USB_DESC_TYPE_INTERFACE,  /* bDescriptorType: Interface */
-  /* Interface descriptor type */
-/*!*/  CDC_INTF_NUM,   /* bInterfaceNumber: Number of Interface */
-  0x00,   /* bAlternateSetting: Alternate setting */
-  0x03,   /* bNumEndpoints: 3 endpoints used */
-  0x02,   /* bInterfaceClass: Communication Interface Class */
-  0x02,   /* bInterfaceSubClass: Abstract Control Model */
-  0x00,   /* bInterfaceProtocol: Common AT commands */
-  0x00,   /* iInterface: */
+        /*ACM Functional Descriptor*/
+        0x04, /* bFunctionLength */
+        0x24, /* bDescriptorType: CS_INTERFACE */
+        0x02, /* bDescriptorSubtype: Abstract Control Management desc */
+        0x02, /* bmCapabilities */
 
-  /*Header Functional Descriptor*/
-  0x05,   /* bLength: Endpoint Descriptor size */
-  0x24,   /* bDescriptorType: CS_INTERFACE */
-  0x00,   /* bDescriptorSubtype: Header Func Desc */
-  0x10,   /* bcdCDC: spec release number */
-  0x01,
+        /*Union Functional Descriptor*/
+        0x05,                      /* bFunctionLength */
+        0x24,                      /* bDescriptorType: CS_INTERFACE */
+        0x06,                      /* bDescriptorSubtype: Union func desc */
+        /*!*/ CDC_MASTER_INTF_NUM, /* bMasterInterface: Communication class interface */
+        /*!*/ CDC_SLAVE_INTF_NUM,  /* bSlaveInterface0: Data Class Interface */
 
-  /*Call Management Functional Descriptor*/
-  0x05,   /* bFunctionLength */
-  0x24,   /* bDescriptorType: CS_INTERFACE */
-  0x01,   /* bDescriptorSubtype: Call Management Func Desc */
-  0x00,   /* bmCapabilities: D0+D1 */
-/*!*/  CDC_INTF_NUM,   /* bDataInterface: 0 */
+        /* Control Endpoint Descriptor*/
+        0x07,                        /* bLength: Endpoint Descriptor size */
+        USB_DESC_TYPE_ENDPOINT,      /* bDescriptorType: Endpoint */
+        CDC_CMD_EP,                  /* bEndpointAddress */
+        0x03,                        /* bmAttributes: Interrupt */
+        LOBYTE(CDC_CMD_PACKET_SIZE), /* wMaxPacketSize: */
+        HIBYTE(CDC_CMD_PACKET_SIZE),
+        0x10, /* bInterval: */
 
-  /*ACM Functional Descriptor*/
-  0x04,   /* bFunctionLength */
-  0x24,   /* bDescriptorType: CS_INTERFACE */
-  0x02,   /* bDescriptorSubtype: Abstract Control Management desc */
-  0x02,   /* bmCapabilities */
+        /* Interface descriptor */
+        0x09,                    /* bLength */
+        USB_DESC_TYPE_INTERFACE, /* bDescriptorType */
+        CDC_SLAVE_INTF_NUM,      /* bInterfaceNumber */
+        0x00,                    /* bAlternateSetting */
+        0x02,                    /* bNumEndpoints */
+        0x0A,                    /* bInterfaceClass: Communication class data */
+        0x00,                    /* bInterfaceSubClass */
+        0x00,                    /* bInterfaceProtocol */
+        0x00,
 
-  /*Union Functional Descriptor*/
-  0x05,   /* bFunctionLength */
-  0x24,   /* bDescriptorType: CS_INTERFACE */
-  0x06,   /* bDescriptorSubtype: Union func desc */
-/*!*/  CDC_INTF_NUM,   /* bMasterInterface: Communication class interface */
-/*!*/  CDC_INTF_NUM,   /* bSlaveInterface0: Data Class Interface */
+        /*Endpoint OUT Descriptor*/
+        0x07,                                /* bLength: Endpoint Descriptor size */
+        USB_DESC_TYPE_ENDPOINT,              /* bDescriptorType: Endpoint */
+        CDC_OUT_EP,                          /* bEndpointAddress */
+        0x02,                                /* bmAttributes: Bulk */
+        LOBYTE(CDC_DATA_FS_MAX_PACKET_SIZE), /* wMaxPacketSize: */
+        HIBYTE(CDC_DATA_FS_MAX_PACKET_SIZE),
+        0x00, /* bInterval: ignore for Bulk transfer */
 
-  /*Endpoint 2 Descriptor*/
-  0x07,                           /* bLength: Endpoint Descriptor size */
-  USB_DESC_TYPE_ENDPOINT,   /* bDescriptorType: Endpoint */
-  CDC_CMD_EP,                     /* bEndpointAddress */
-  0x03,                           /* bmAttributes: Interrupt */
-  LOBYTE(CDC_CMD_PACKET_SIZE),     /* wMaxPacketSize: */
-  HIBYTE(CDC_CMD_PACKET_SIZE),
-  0x10,                           /* bInterval: */
-
-  /*Endpoint OUT Descriptor*/
-  0x07,   /* bLength: Endpoint Descriptor size */
-  USB_DESC_TYPE_ENDPOINT,      /* bDescriptorType: Endpoint */
-  CDC_OUT_EP,                        /* bEndpointAddress */
-  0x02,                              /* bmAttributes: Bulk */
-  LOBYTE(CDC_DATA_FS_MAX_PACKET_SIZE),  /* wMaxPacketSize: */
-  HIBYTE(CDC_DATA_FS_MAX_PACKET_SIZE),
-  0x00,                              /* bInterval: ignore for Bulk transfer */
-
-  /*Endpoint IN Descriptor*/
-  0x07,   /* bLength: Endpoint Descriptor size */
-  USB_DESC_TYPE_ENDPOINT,      /* bDescriptorType: Endpoint */
-  CDC_IN_EP,                         /* bEndpointAddress */
-  0x02,                              /* bmAttributes: Bulk */
-  LOBYTE(CDC_DATA_FS_MAX_PACKET_SIZE),  /* wMaxPacketSize: */
-  HIBYTE(CDC_DATA_FS_MAX_PACKET_SIZE),
-  0x00,                               /* bInterval: ignore for Bulk transfer */
+        /*Endpoint IN Descriptor*/
+        0x07,                                /* bLength: Endpoint Descriptor size */
+        USB_DESC_TYPE_ENDPOINT,              /* bDescriptorType: Endpoint */
+        CDC_IN_EP,                           /* bEndpointAddress */
+        0x02,                                /* bmAttributes: Bulk */
+        LOBYTE(CDC_DATA_FS_MAX_PACKET_SIZE), /* wMaxPacketSize: */
+        HIBYTE(CDC_DATA_FS_MAX_PACKET_SIZE),
+        0x00, /* bInterval: ignore for Bulk transfer */
 
+        4, /* Descriptor size */
+        3, /* Descriptor type */
+        0x09,
+        0x04,
 #endif
 };
 
-
 USBD_ClassTypeDef USBD_Composite =
 {
   USBD_Composite_Init,
@@ -195,14 +217,27 @@ int in_endpoint_to_class[MAX_ENDPOINTS];
 
 int out_endpoint_to_class[MAX_ENDPOINTS];
 
-void USBD_Composite_Set_Classes(USBD_ClassTypeDef *class0, USBD_ClassTypeDef *class1) {
-    USBD_Classes[0] = class0;
-    USBD_Classes[1] = class1;
+void USBD_Composite_Set_Classes(USBD_ClassTypeDef *hid_class, USBD_ClassTypeDef *cdc_class) {
+    USBD_Classes[0] = hid_class;
+    USBD_Classes[1] = cdc_class;
+}
+
+static USBD_ClassTypeDef * getClass(uint8_t index)
+{
+    switch(index)
+    {
+    case HID_INTF_NUM:
+        return USBD_Classes[0];
+    case CDC_MASTER_INTF_NUM:
+    case CDC_SLAVE_INTF_NUM:
+        return USBD_Classes[1];
+    }
+    return NULL;
 }
 
 static uint8_t USBD_Composite_Init (USBD_HandleTypeDef *pdev, uint8_t cfgidx) {
     int i;
-    for(i = 0; i < NUM_INTERFACES; i++) {
+    for(i = 0; i < NUM_CLASSES; i++) {
         if (USBD_Classes[i]->Init(pdev, cfgidx) != USBD_OK) {
             return USBD_FAIL;
         }
@@ -213,7 +248,7 @@ static uint8_t USBD_Composite_Init (USBD_HandleTypeDef *pdev, uint8_t cfgidx) {
 
 static uint8_t  USBD_Composite_DeInit (USBD_HandleTypeDef *pdev, uint8_t cfgidx) {
     int i;
-    for(i = 0; i < NUM_INTERFACES; i++) {
+    for(i = 0; i < NUM_CLASSES; i++) {
         if (USBD_Classes[i]->DeInit(pdev, cfgidx) != USBD_OK) {
             return USBD_FAIL;
         }
@@ -224,10 +259,13 @@ static uint8_t  USBD_Composite_DeInit (USBD_HandleTypeDef *pdev, uint8_t cfgidx)
 
 static uint8_t USBD_Composite_Setup (USBD_HandleTypeDef *pdev, USBD_SetupReqTypedef *req) {
     int i;
+    USBD_ClassTypeDef * device_class;
+    device_class = getClass(req->wIndex);
+
     switch (req->bmRequest & USB_REQ_TYPE_MASK) {
         case USB_REQ_TYPE_CLASS :
-            if (req->wIndex < NUM_INTERFACES)
-                return USBD_Classes[req->wIndex]->Setup(pdev, req);
+            if (device_class != NULL)
+                return device_class->Setup(pdev, req);
             else
                 return USBD_FAIL;
 
@@ -236,7 +274,7 @@ static uint8_t USBD_Composite_Setup (USBD_HandleTypeDef *pdev, USBD_SetupReqType
             switch (req->bRequest) {
 
                 case USB_REQ_GET_DESCRIPTOR :
-                    for(i = 0; i < NUM_INTERFACES; i++) {
+                    for(i = 0; i < NUM_CLASSES; i++) {
                         if (USBD_Classes[i]->Setup(pdev, req) != USBD_OK) {
                             return USBD_FAIL;
                         }
@@ -246,8 +284,8 @@ static uint8_t USBD_Composite_Setup (USBD_HandleTypeDef *pdev, USBD_SetupReqType
 
         case USB_REQ_GET_INTERFACE :
         case USB_REQ_SET_INTERFACE :
-            if (req->wIndex < NUM_INTERFACES)
-                return USBD_Classes[req->wIndex]->Setup(pdev, req);
+            if (device_class != NULL)
+                return device_class->Setup(pdev, req);
             else
                 return USBD_FAIL;
         }
@@ -274,7 +312,7 @@ static uint8_t USBD_Composite_DataOut (USBD_HandleTypeDef *pdev, uint8_t epnum)
 
 static uint8_t USBD_Composite_EP0_RxReady (USBD_HandleTypeDef *pdev) {
     int i;
-    for(i = 0; i < NUM_INTERFACES; i++) {
+    for(i = 0; i < NUM_CLASSES; i++) {
         if (USBD_Classes[i]->EP0_RxReady != NULL) {
             if (USBD_Classes[i]->EP0_RxReady(pdev) != USBD_OK) {
                 return USBD_FAIL;

targets/stm32l432/src/device.c

@@ -38,6 +38,8 @@ void wait_for_usb_tether();
 
 
 uint32_t __90_ms = 0;
+uint32_t __last_button_press_time = 0;
+uint32_t __last_button_bounce_time = 0;
 uint32_t __device_status = 0;
 uint32_t __last_update = 0;
 extern PCD_HandleTypeDef hpcd;
@@ -75,6 +77,21 @@ void TIM6_DAC_IRQHandler()
             ctaphid_update_status(__device_status);
         }
     }
+
+
+    if (is_touch_button_pressed == IS_BUTTON_PRESSED)
+    {
+        if (IS_BUTTON_PRESSED())
+        {
+            // Only allow 1 press per 25 ms.
+            if ((millis() - __last_button_bounce_time) > 25)
+            {
+                __last_button_press_time = millis();
+            }
+            __last_button_bounce_time = millis();
+        }
+    }
+
 #ifndef IS_BOOTLOADER
 	// NFC sending WTX if needs
 	if (device_is_nfc() == NFC_IS_ACTIVE)
@@ -84,6 +101,21 @@ void TIM6_DAC_IRQHandler()
 #endif
 }
 
+// Interrupt on rising edge of button (button released)
+void EXTI0_IRQHandler(void)
+{
+    EXTI->PR1 = EXTI->PR1;
+    if (is_physical_button_pressed == IS_BUTTON_PRESSED)
+    {
+        // Only allow 1 press per 25 ms.
+        if ((millis() - __last_button_bounce_time) > 25)
+        {
+            __last_button_press_time = millis();
+        }
+        __last_button_bounce_time = millis();
+    }
+}
+
 // Global USB interrupt handler
 void USB_IRQHandler(void)
 {
@@ -493,6 +525,41 @@ static int handle_packets()
     return 0;
 }
 
+static int wait_for_button_activate(uint32_t wait)
+{
+    int ret;
+    uint32_t start = millis();
+    do
+    {
+        if ((start + wait) < millis())
+        {
+            return 0;
+        }
+        delay(1);
+        ret = handle_packets();
+        if (ret)
+            return ret;
+    } while (!IS_BUTTON_PRESSED());
+    return 0;
+}
+static int wait_for_button_release(uint32_t wait)
+{
+    int ret;
+    uint32_t start = millis();
+    do
+    {
+        if ((start + wait) < millis())
+        {
+            return 0;
+        }
+        delay(1);
+        ret = handle_packets();
+        if (ret)
+            return ret;
+    } while (IS_BUTTON_PRESSED());
+    return 0;
+}
+
 int ctap_user_presence_test(uint32_t up_delay)
 {
     int ret;
@@ -500,6 +567,7 @@ int ctap_user_presence_test(uint32_t up_delay)
     {
         return 1;
     }
+
 #if SKIP_BUTTON_CHECK_WITH_DELAY
     int i=500;
     while(i--)
@@ -512,53 +580,41 @@ int ctap_user_presence_test(uint32_t up_delay)
 #elif SKIP_BUTTON_CHECK_FAST
     delay(2);
     ret = handle_packets();
-    if (ret) return ret;
+    if (ret)
+        return ret;
     goto done;
 #endif
-    uint32_t t1 = millis();
+
+    // If button was pressed within last [2] seconds, succeed.
+    if (__last_button_press_time && (millis() - __last_button_press_time < 2000))
+    {
+        goto done;
+    }
+
+    // Set LED status and wait.
     led_rgb(0xff3520);
 
-if (IS_BUTTON_PRESSED == is_touch_button_pressed)
-{
-    // Wait for user to release touch button if it's already pressed
-    while (IS_BUTTON_PRESSED())
-    {
-        if (t1 + up_delay < millis())
-        {
-            printf1(TAG_GEN,"Button not pressed\n");
-            goto fail;
-        }
-        ret = handle_packets();
-        if (ret) return ret;
-    }
-}
-
-t1 = millis();
-
-do
-{
-    if (t1 + up_delay < millis())
-    {
-        goto fail;
-    }
-    delay(1);
-    ret = handle_packets();
+    // Block and wait for some time.
+    ret = wait_for_button_activate(up_delay);
+    if (ret) return ret;
+    ret = wait_for_button_release(up_delay);
     if (ret) return ret;
-}
-while (! IS_BUTTON_PRESSED());
 
-led_rgb(0x001040);
-
-delay(50);
+    // If button was pressed within last [2] seconds, succeed.
+    if (__last_button_press_time && (millis() - __last_button_press_time < 2000))
+    {
+        goto done;
+    }
+
+
+    return 0;
 
 
-#if SKIP_BUTTON_CHECK_WITH_DELAY || SKIP_BUTTON_CHECK_FAST
 done:
-#endif
-return 1;
+    ret = wait_for_button_release(up_delay);
+    __last_button_press_time = 0;
+    return 1;
 
-fail:
-return 0;
 }
 
 int ctap_generate_rng(uint8_t * dst, size_t num)

targets/stm32l432/src/init.c

@@ -20,6 +20,7 @@
 #include "stm32l4xx_ll_rng.h"
 #include "stm32l4xx_ll_spi.h"
 #include "stm32l4xx_ll_usb.h"
+#include "stm32l4xx_ll_exti.h"
 #include "stm32l4xx_hal_pcd.h"
 #include "stm32l4xx_hal.h"
 
@@ -849,19 +850,17 @@ void init_gpio(void)
   LL_GPIO_SetPinMode(SOLO_BUTTON_PORT,SOLO_BUTTON_PIN,LL_GPIO_MODE_INPUT);
   LL_GPIO_SetPinPull(SOLO_BUTTON_PORT,SOLO_BUTTON_PIN,LL_GPIO_PULL_UP);
 
-#ifdef SOLO_AMS_IRQ_PORT
-// SAVE POWER
-  // LL_AHB2_GRP1_EnableClock(LL_AHB2_GRP1_PERIPH_GPIOC);
-  // /**/
-  // LL_GPIO_InitTypeDef GPIO_InitStruct;
-  // GPIO_InitStruct.Pin = SOLO_AMS_IRQ_PIN;
-  // GPIO_InitStruct.Mode = LL_GPIO_MODE_INPUT;
-  // GPIO_InitStruct.Pull = LL_GPIO_PULL_NO;
-  // LL_GPIO_Init(SOLO_AMS_IRQ_PORT, &GPIO_InitStruct);
-  //
-  //
-  // LL_GPIO_SetPinMode(SOLO_AMS_IRQ_PORT,SOLO_AMS_IRQ_PIN,LL_GPIO_MODE_INPUT);
-  // LL_GPIO_SetPinPull(SOLO_AMS_IRQ_PORT,SOLO_AMS_IRQ_PIN,LL_GPIO_PULL_UP);
+#ifndef IS_BOOTLOADER
+  LL_SYSCFG_SetEXTISource(LL_SYSCFG_EXTI_PORTA, LL_SYSCFG_EXTI_LINE0);
+  LL_EXTI_InitTypeDef EXTI_InitStruct;
+  EXTI_InitStruct.Line_0_31 = LL_EXTI_LINE_0;   // GPIOA_0
+  EXTI_InitStruct.Line_32_63 = LL_EXTI_LINE_NONE;
+  EXTI_InitStruct.LineCommand = ENABLE;
+  EXTI_InitStruct.Mode = LL_EXTI_MODE_IT;
+  EXTI_InitStruct.Trigger = LL_EXTI_TRIGGER_RISING;
+  LL_EXTI_Init(&EXTI_InitStruct);
+
+  NVIC_EnableIRQ(EXTI0_IRQn);
 #endif
 
 }

targets/stm32l432/src/nfc.c

@@ -92,19 +92,27 @@ int nfc_init()
     return NFC_IS_NA;
 }
 
+static uint8_t gl_int0 = 0;
 void process_int0(uint8_t int0)
 {
-
+    gl_int0 = int0;
 }
 
 bool ams_wait_for_tx(uint32_t timeout_ms)
 {
+    if (gl_int0 & AMS_INT_TXE) {
+		uint8_t int0 = ams_read_reg(AMS_REG_INT0);
+		process_int0(int0);
+        
+        return true;
+    }
+    
 	uint32_t tstart = millis();
 	while (tstart + timeout_ms > millis())
 	{
 		uint8_t int0 = ams_read_reg(AMS_REG_INT0);
-		if (int0) process_int0(int0);
-		if (int0 & AMS_INT_TXE)
+		process_int0(int0);
+		if (int0 & AMS_INT_TXE || int0 & AMS_INT_RXE)
 			return true;
 
 		delay(1);
@@ -121,8 +129,13 @@ bool ams_receive_with_timeout(uint32_t timeout_ms, uint8_t * data, int maxlen, i
 	uint32_t tstart = millis();
 	while (tstart + timeout_ms > millis())
 	{
-		uint8_t int0 = ams_read_reg(AMS_REG_INT0);
-		if (int0) process_int0(int0);
+        uint8_t int0 = 0;
+        if (gl_int0 & AMS_INT_RXE) {
+            int0 = gl_int0;
+        } else {
+            int0 = ams_read_reg(AMS_REG_INT0);
+            process_int0(int0);
+        }
 		uint8_t buffer_status2 = ams_read_reg(AMS_REG_BUF2);
 
         if (buffer_status2 && (int0 & AMS_INT_RXE))
@@ -196,7 +209,6 @@ bool nfc_write_response(uint8_t req0, uint16_t resp)
 void nfc_write_response_chaining(uint8_t req0, uint8_t * data, int len)
 {
     uint8_t res[32 + 2];
-	int sendlen = 0;
 	uint8_t iBlock = NFC_CMD_IBLOCK | (req0 & 0x0f);
     uint8_t block_offset = p14443_block_offset(req0);
 
@@ -208,6 +220,7 @@ void nfc_write_response_chaining(uint8_t req0, uint8_t * data, int len)
 			memcpy(&res[block_offset], data, len);
 		nfc_write_frame(res, len + block_offset);
 	} else {
+        int sendlen = 0;
 		do {
 			// transmit I block
 			int vlen = MIN(32 - block_offset, len - sendlen);
@@ -227,11 +240,11 @@ void nfc_write_response_chaining(uint8_t req0, uint8_t * data, int len)
 			sendlen += vlen;
 
 			// wait for transmit (32 bytes aprox 2,5ms)
-			// if (!ams_wait_for_tx(10))
-			// {
-			// 	printf1(TAG_NFC, "TX timeout. slen: %d \r\n", sendlen);
-			// 	break;
-			// }
+			 if (!ams_wait_for_tx(5))
+			 {
+			 	printf1(TAG_NFC, "TX timeout. slen: %d \r\n", sendlen);
+			 	break;
+			 }
 
 			// if needs to receive R block (not a last block)
 			if (res[0] & 0x10)
@@ -316,7 +329,7 @@ bool WTX_off()
 void WTX_timer_exec()
 {
 	// condition: (timer on) or (not expired[300ms])
-	if ((WTX_timer <= 0) || WTX_timer + 300 > millis())
+	if ((WTX_timer == 0) || WTX_timer + 300 > millis())
 		return;
 
 	WTX_process(10);
@@ -327,12 +340,12 @@ void WTX_timer_exec()
 // read timeout must be 10 ms to call from interrupt
 bool WTX_process(int read_timeout)
 {
-	uint8_t wtx[] = {0xf2, 0x01};
 	if (WTX_fail)
 		return false;
 
 	if (!WTX_sent)
 	{
+        uint8_t wtx[] = {0xf2, 0x01};
 		nfc_write_frame(wtx, sizeof(wtx));
 		WTX_sent = true;
 		return true;
@@ -618,7 +631,7 @@ void nfc_process_iblock(uint8_t * buf, int len)
 			if (!WTX_off())
 				return;
 
-			printf1(TAG_NFC, "CTAP resp: 0x%02<EFBFBD>  len: %d\r\n", status, ctap_resp.length);
+			printf1(TAG_NFC, "CTAP resp: 0x%02x  len: %d\r\n", status, ctap_resp.length);
 
 			if (status == CTAP1_ERR_SUCCESS)
 			{
@@ -779,6 +792,8 @@ int nfc_loop()
 
 
     read_reg_block(&ams);
+    uint8_t old_int0 = gl_int0;
+    process_int0(ams.regs.int0);
     uint8_t state = AMS_STATE_MASK & ams.regs.rfid_status;
 
     if (state != AMS_STATE_SELECTED && state != AMS_STATE_SELECTEDX)
@@ -792,7 +807,7 @@ int nfc_loop()
         // if (state != AMS_STATE_SENSE)
         //      printf1(TAG_NFC,"    %s  x%02x\r\n", ams_get_state_string(ams.regs.rfid_status), state);
     }
-    if (ams.regs.int0 & AMS_INT_INIT)
+    if (ams.regs.int0 & AMS_INT_INIT || old_int0 & AMS_INT_INIT)
     {
         nfc_state_init();
     }
@@ -801,7 +816,7 @@ int nfc_loop()
         // ams_print_int1(ams.regs.int1);
     }
 
-    if ((ams.regs.int0 & AMS_INT_RXE))
+    if (ams.regs.int0 & AMS_INT_RXE || old_int0 & AMS_INT_RXE)
     {
         if (ams.regs.buffer_status2)
         {