Revision 0:62f897b8acfa, committed 2015-02-04

Comitter:

wataaki

Date:

Wed Feb 04 06:01:04 2015 +0000

Commit message:

initial version

Changed in this revision

diff -r 000000000000 -r 62f897b8acfa PCA9541A.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PCA9541A.cpp	Wed Feb 04 06:01:04 2015 +0000
@@ -0,0 +1,68 @@
+#include "mbed.h"
+ 
+I2C i2c(p28,p27);        // sda, scl
+Serial pc(USBTX, USBRX); // tx, rx
+char cmd[32];
+int i, j, k;
+int sw;
+ 
+void set_ch(char sel)
+{    // PCA9541のサンプル
+        // MST_0側の自分にスレーブ側の制御権を得る場合
+    cmd[0] = 1;                     // PCA9541 コマンドコード Cont Reg
+    i2c.write( 0xe2, cmd, 1);       // Cont Regを指定
+    i2c.read( 0xe2, cmd, 1);        // Cont Regを読込み
+    wait(0.1);                      // 0.1s待つ
+    switch(cmd[0] & 0xf)
+    {
+    case 0:                         // bus off, has control
+    case 1:                         // bus off, no control
+    case 5:                         // bus on, no control
+        cmd[0] = 1;                 // PCA9541 コマンドコード Cont Reg
+        cmd[1] = 4;                 // bus on, has control
+        i2c.write( 0xe2, cmd, 2);   // Cont Regにcmd[1]を書込み
+        i2c.read( 0xe2, cmd, 1);    // Cont Regを読込み
+        break;
+    case 2:                         // bus off, no control
+    case 3:                         // bus off, has control
+    case 6:                         // bus on, no control
+        cmd[0] = 1;                 // PCA9541 コマンドコード Cont Reg
+        cmd[1] = 5;                 // bus on, has control
+        i2c.write( 0xe2, cmd, 2);   // Cont Regにcmd[1]を書込み
+        i2c.read( 0xe2, cmd, 1);    // Cont Regを読込み
+        break;
+    case 9:                         // bus on, no control
+    case 0xc:                       // bus on, no control
+    case 0xd:                       // bus off, no control
+        cmd[0] = 1;                 // PCA9541 コマンドコード Cont Reg
+        cmd[1] = 0;                 // bus on, has control
+        i2c.write( 0xe2, cmd, 2);   // Cont Regにcmd[1]を書込み
+        i2c.read( 0xe2, cmd, 1);    // Cont Regを読込み
+        break;
+    case 0xa:                       // bus on, no control
+    case 0xe:                       // bus off, no control
+    case 0xf:                       // bus on, has control
+        cmd[0] = 1;                 // PCA9541 コマンドコード Cont Reg
+        cmd[1] = 1;                 // bus on, has control
+        i2c.write( 0xe2, cmd, 2);   // Cont Regにcmd[1]を書込み
+        i2c.read( 0xe2, cmd, 1);    // Cont Regを読込み
+        break;
+    default:
+        break;
+    }
+
+    cmd[0] = sel;                   // PCA9546 Cont Reg sel channel enabled
+    i2c.write( 0xe8, cmd, 1);       // Send command string
+}
+
+int main ()
+{
+    i2c.frequency(100000);
+    pc.printf("PCA9541A Sample Program\r\n");
+
+    set_ch(1);              // PCA9541Aによりマスターを選択後
+                            // PCA9546によりchｎに接続
+    
+  // PCA9541A
+    while(1);
+}

diff -r 000000000000 -r 62f897b8acfa mbed.bld
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Wed Feb 04 06:01:04 2015 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/4fc01daae5a5
\ No newline at end of file