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@key(Mitsukuni Sato)

Afero Modulo-1とM5Stackで遊ぶ

Last updated at Posted at 2019-12-31

前提

確認したいこと

  • afLibの使い方の確認
    • Aferoデバイスのデータがどのように送受信できるのか
    • 具体的なイベントの種類

サンプルコード

サンプルコードはafLibの afero-clock を使用した。
そのままではM5Stackで動かないので、UART通信 / SPI通信それぞれ用にパッチを当てて確認。

UART編

結線

  • M5Stackの5V出力をModulo-1のVINへ
  • GNDはてきとうに
  • GPIO16 / GPIO17をソフトウェアシリアルの入出力に使う
    • GPIO16 = TX
    • GPIO17 = RX

image.png

差分

--- examples/afero_clock/afero_clock.ino	2019-12-31 15:20:46.000000000 +0900
+++ ../../aflib_test/afero_clock/afero_clock.ino	2019-12-31 19:30:26.000000000 +0900
@@ -98,12 +98,12 @@
 // as long as the Modulo is flashed with a profile that has MCU support enabled.
 // We have a demo profile here that you can flash to our Modulo if you need one
 //#include "profile/afero_clock_Modulo-1_SPI/device-description.h"           // For Modulo-1 SPI
-//#include "profile/afero_clock_Modulo-1_UART/device-description.h"          // For Modulo-1 UART
+#include "profile/afero_clock_Modulo-1_UART/device-description.h"          // For Modulo-1 UART
 //#include "profile/afero_clock_Modulo-1B_SPI/device-description.h"          // For Modulo-1B SPI
 //#include "profile/afero_clock_Modulo-1B_UART/device-description.h"         // For Modulo-1B UART
 //#include "profile/afero_clock_Modulo-2_SPI/device-description.h"           // For Modulo-2 SPI
 //#include "profile/afero_clock_Modulo-2_UART/device-description.h"          // For Modulo-2 UART
-#include "profile/afero_clock_Plumo-2D_UART/device-description.h"         // For Plumo-2D, UART
+//#include "profile/afero_clock_Plumo-2D_UART/device-description.h"         // For Plumo-2D, UART



@@ -152,7 +152,8 @@
 #define TX_PIN                    8

 #else
-#error "Sorry, afLib can not identify this board, define necessary pins in sketch"
+#define RX_PIN                    17
+#define TX_PIN                    16
 #endif

 // Serial monitor baud rate
@@ -215,13 +216,6 @@
           }
           break;

-        case AF_UTC_TIME:
-          asr_utc_time = *((int32_t *)value);
-          af_logger_print_buffer("ASR UTC Time: ");
-          printTimeString((time_t)asr_utc_time);
-          // TODO: If you have an RTC this would be a good place to set the clock time
-          break;
-
         case AF_SYSTEM_ASR_STATE:
           af_logger_print_buffer("ASR state=");
           switch (value[0]) {
@@ -441,10 +435,6 @@
       printAttrHex("UTC Offset Data", attributeId, valueLen, value);
       break;

-    case AF_UTC_TIME:
-      printAttr32("ASR Timestamp", attributeId, valueLen, value);
-      break;
-
     case AF_APPLICATION_VERSION:
       printAttr16("FW Version", attributeId, valueLen, value);
       break;

SPI編

結線

  • M5Stackの5V出力をModulo-1のVINへ(UARTと同じ)
  • GNDはてきとうに
  • M5StackのSPIインターフェースをそれぞれ接続する
    • Modulo-1 の RESET_B を GPIO2 へ
    • Modulo-1 の SPI_SCS を GPIO16 へ
    • Modulo-1 の HOST_INT_B を GPIO17 へ

image.png

差分

UART版との差分のみ。Modulo-1がリセットループしてしまうので、明示的にリセットをしてからハイに引っ張る（Modulo-1のリセット端子はアクティブロー）。

--- examples/afero_clock/afero_clock.ino	2019-12-31 15:20:46.000000000 +0900
+++ ../../aflib_test/afero_clock/afero_clock.ino	2019-12-31 20:30:28.000000000 +0900
@@ -97,13 +97,13 @@
 // system attributes exist in all profiles created with Profile Editor > 1.2.1
 // as long as the Modulo is flashed with a profile that has MCU support enabled.
 // We have a demo profile here that you can flash to our Modulo if you need one
-//#include "profile/afero_clock_Modulo-1_SPI/device-description.h"           // For Modulo-1 SPI
+#include "profile/afero_clock_Modulo-1_SPI/device-description.h"           // For Modulo-1 SPI
 //#include "profile/afero_clock_Modulo-1_UART/device-description.h"          // For Modulo-1 UART
 //#include "profile/afero_clock_Modulo-1B_SPI/device-description.h"          // For Modulo-1B SPI
 //#include "profile/afero_clock_Modulo-1B_UART/device-description.h"         // For Modulo-1B UART
 //#include "profile/afero_clock_Modulo-2_SPI/device-description.h"           // For Modulo-2 SPI
 //#include "profile/afero_clock_Modulo-2_UART/device-description.h"          // For Modulo-2 UART
-#include "profile/afero_clock_Plumo-2D_UART/device-description.h"         // For Plumo-2D, UART
+//#include "profile/afero_clock_Plumo-2D_UART/device-description.h"         // For Plumo-2D, UART



@@ -118,8 +118,8 @@
 // the physical hardware pins connecting the MCU and Modulo, and also
 // the MCU Configuration section of the profile loaded on the Modulo
 //     (in the Afero Profile Editor app "Attributes" menu, interface and UART speed)
-//#define ASR_USE_SPI                   1
-#define ASR_USE_UART                  1
+#define ASR_USE_SPI                   1
+//#define ASR_USE_UART                  1

 // For Modulo-1 UART speed is fixed at 9600
 // For Modulo-2 the UART_BAUD_RATE here must match the UART speed set in Profile Editor
@@ -152,7 +152,9 @@
 #define TX_PIN                    8

 #else
-#error "Sorry, afLib can not identify this board, define necessary pins in sketch"
+#define RESET                     2    // This pin is used to reboot the Modulo when needed
+#define INT_PIN                   17    // Modulo sends an interrupt on this pin to initiate communication
+#define CS_PIN                    16    // Standard SPI chip select line
 #endif

 // Serial monitor baud rate
@@ -278,16 +273,11 @@

   af_logger_println_buffer("afLib: Time of Day from Afero Cloud Example");

-  // The Plinto board automatically connects reset on UNO to reset on Modulo
-  // For Teensy, we need to reset manually...
-#if defined(TEENSYDUINO)
   pinMode(RESET, OUTPUT);
   digitalWrite(RESET, 0);
   delay(250);
   digitalWrite(RESET, 1);
-  // This leaves the reset pin pulled high when unused
   pinMode(RESET, INPUT_PULLUP);
-#endif


   // Start the sketch awaiting initialization

動作の流れ

  • arduino_transport_create_uart() でUART入出力を取り扱えるようにする
  • attrEventCallback() をコールバック関数として定義し、受信データを処理する
  • イベント種別が AF_LIB_EVENT_ASR_NOTIFICATION であった場合、ASR-1のイベントとして処理する
    • ユーザ操作などの属性変更もここに含まれる
  • AferoデバイスがAferoクラウドに接続されると AF_SYSTEM_LINKED_TIMESTAMP が発生する
19:44:49.138 -> afLib: Time of Day from Afero Cloud Example
19:44:49.269 -> Using UART
19:45:11.407 -> Attribute Id: 65015
19:45:11.407 -> attr Linked Timestamp=1577789110
19:45:11.444 -> ASR linked at: Tue 2019-12-31 10:45:10 GMT
19:45:11.591 -> Attribute Id: 65013
19:45:11.591 -> ASR state=Linked
19:45:11.810 -> Attribute Id: 65001
19:45:11.810 -> attr UTC Offset Data=1c2b626b5e1c2
19:45:11.810 -> Current TZ: 9h
19:45:11.810 -> Next Offset: 9h at Tue 2019-12-31 10:45:10 GMT

わかったこと

ハードウェアに固有のイベントがある

Modulo-1は AF_UTC_TIME イベントに対応していない。
イベント名が微妙に違うけどたぶん次の箇所。

** Note: ASR_UTC_TIME is not supported on Modulo-1/ASR-1 but is supported on all other Afero modules.

プロフィールによって通信バスが異なる

Modulo-1のプロフィールはSPI / UARTを明示的に選択する必要があり、サンプルも2つのプロフィールに分かれている。SPIプロフィールではUARTにデータは出力されない。

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