CQ_I2C_book / Mbed 2 deprecated PCA9624

8-bit Fm+ I2C-bus 100 mA 40 V LED driver

Dependencies:   mbed

PCA9624.cpp@0:5b422753a79e, 2015-02-04 (annotated)

Committer:
wataaki
Date:
Wed Feb 04 06:05:59 2015 +0000
Revision:
0:5b422753a79e
Initial version

Who changed what in which revision?

UserRevisionLine numberNew contents of line
wataaki 0:5b422753a79e 1 #include "mbed.h"
wataaki 0:5b422753a79e 2 #include "PCA9624.h"
wataaki 0:5b422753a79e 3
wataaki 0:5b422753a79e 4 I2C i2c(p28,p27); // sda, scl
wataaki 0:5b422753a79e 5 Serial pc(USBTX, USBRX); // tx, rx
wataaki 0:5b422753a79e 6 char cmd[32];
wataaki 0:5b422753a79e 7 int i, j;
wataaki 0:5b422753a79e 8
wataaki 0:5b422753a79e 9 void set_ch(char sel)
wataaki 0:5b422753a79e 10 { // PCA9541のサンプル
wataaki 0:5b422753a79e 11 // MST_0側の自分にスレーブ側の制御権を得る場合
wataaki 0:5b422753a79e 12 cmd[0] = 1; // PCA9541 コマンドコード Cont Reg
wataaki 0:5b422753a79e 13 i2c.write( 0xe2, cmd, 1); // Cont Regを指定
wataaki 0:5b422753a79e 14 i2c.read( 0xe2, cmd, 1); // Cont Regを読込み
wataaki 0:5b422753a79e 15 wait(0.1); // 0.1s待つ
wataaki 0:5b422753a79e 16 switch(cmd[0] & 0xf)
wataaki 0:5b422753a79e 17 {
wataaki 0:5b422753a79e 18 case 0: // bus off, has control
wataaki 0:5b422753a79e 19 case 1: // bus off, no control
wataaki 0:5b422753a79e 20 case 5: // bus on, no control
wataaki 0:5b422753a79e 21 cmd[0] = 1; // PCA9541 コマンドコード Cont Reg
wataaki 0:5b422753a79e 22 cmd[1] = 4; // bus on, has control
wataaki 0:5b422753a79e 23 i2c.write( 0xe2, cmd, 2); // Cont Regにcmd[1]を書込み
wataaki 0:5b422753a79e 24 i2c.read( 0xe2, cmd, 1); // Cont Regを読込み
wataaki 0:5b422753a79e 25 break;
wataaki 0:5b422753a79e 26 case 2: // bus off, no control
wataaki 0:5b422753a79e 27 case 3: // bus off, has control
wataaki 0:5b422753a79e 28 case 6: // bus on, no control
wataaki 0:5b422753a79e 29 cmd[0] = 1; // PCA9541 コマンドコード Cont Reg
wataaki 0:5b422753a79e 30 cmd[1] = 5; // bus on, has control
wataaki 0:5b422753a79e 31 i2c.write( 0xe2, cmd, 2); // Cont Regにcmd[1]を書込み
wataaki 0:5b422753a79e 32 i2c.read( 0xe2, cmd, 1); // Cont Regを読込み
wataaki 0:5b422753a79e 33 break;
wataaki 0:5b422753a79e 34 case 9: // bus on, no control
wataaki 0:5b422753a79e 35 case 0xc: // bus on, no control
wataaki 0:5b422753a79e 36 case 0xd: // bus off, no control
wataaki 0:5b422753a79e 37 cmd[0] = 1; // PCA9541 コマンドコード Cont Reg
wataaki 0:5b422753a79e 38 cmd[1] = 0; // bus on, has control
wataaki 0:5b422753a79e 39 i2c.write( 0xe2, cmd, 2); // Cont Regにcmd[1]を書込み
wataaki 0:5b422753a79e 40 i2c.read( 0xe2, cmd, 1); // Cont Regを読込み
wataaki 0:5b422753a79e 41 break;
wataaki 0:5b422753a79e 42 case 0xa: // bus on, no control
wataaki 0:5b422753a79e 43 case 0xe: // bus off, no control
wataaki 0:5b422753a79e 44 case 0xf: // bus on, has control
wataaki 0:5b422753a79e 45 cmd[0] = 1; // PCA9541 コマンドコード Cont Reg
wataaki 0:5b422753a79e 46 cmd[1] = 1; // bus on, has control
wataaki 0:5b422753a79e 47 i2c.write( 0xe2, cmd, 2); // Cont Regにcmd[1]を書込み
wataaki 0:5b422753a79e 48 i2c.read( 0xe2, cmd, 1); // Cont Regを読込み
wataaki 0:5b422753a79e 49 break;
wataaki 0:5b422753a79e 50 default:
wataaki 0:5b422753a79e 51 break;
wataaki 0:5b422753a79e 52 }
wataaki 0:5b422753a79e 53
wataaki 0:5b422753a79e 54 cmd[0] = sel; // PCA9546 Cont Reg sel channel enabled
wataaki 0:5b422753a79e 55 i2c.write( 0xe8, cmd, 1); // Send command string
wataaki 0:5b422753a79e 56 }
wataaki 0:5b422753a79e 57
wataaki 0:5b422753a79e 58 int main ()
wataaki 0:5b422753a79e 59 {
wataaki 0:5b422753a79e 60 i2c.frequency(100000);
wataaki 0:5b422753a79e 61 pc.printf("PCA9624 Sample Program\r\n");
wataaki 0:5b422753a79e 62
wataaki 0:5b422753a79e 63 set_ch(2); // PCA9624はch1に接続
wataaki 0:5b422753a79e 64
wataaki 0:5b422753a79e 65 // PCA9624
wataaki 0:5b422753a79e 66 cmd[0] = MODE1;
wataaki 0:5b422753a79e 67 cmd[1] = 0x0; // SLEEP = 0
wataaki 0:5b422753a79e 68 i2c.write(PCA9624_ADDR, cmd, 2); // cmd[0]Regにcmd[1]を書込み
wataaki 0:5b422753a79e 69
wataaki 0:5b422753a79e 70 cmd[0] = LEDOUT0 + 0x80; // LEDOUT0, Auto incriment
wataaki 0:5b422753a79e 71 cmd[1] = 0xaa; // LED3,2,1,0 10= PWM
wataaki 0:5b422753a79e 72 cmd[2] = 0xaa; // LED7,6,5,4 10= PWM
wataaki 0:5b422753a79e 73 i2c.write(PCA9624_ADDR, cmd, 3); // cmd[0]Regにcmd[1-2]を書込み
wataaki 0:5b422753a79e 74
wataaki 0:5b422753a79e 75 while(1)
wataaki 0:5b422753a79e 76 {
wataaki 0:5b422753a79e 77 if (i>7) i = 0; // 0-7を循環
wataaki 0:5b422753a79e 78 cmd[0] = PWM0 + 0x80; // PWM0, Auto incriment
wataaki 0:5b422753a79e 79 for(j=0; j<8; j++) cmd[j+1] = 0x0; // PWM = 0%
wataaki 0:5b422753a79e 80 cmd[i+1] = 0xff; // PWM = 99.6%
wataaki 0:5b422753a79e 81 i2c.write(PCA9624_ADDR, cmd, 9); // cmd[0]Regにcmd[1-16]を書込み
wataaki 0:5b422753a79e 82 wait(1.0);
wataaki 0:5b422753a79e 83 i++;
wataaki 0:5b422753a79e 84 }
wataaki 0:5b422753a79e 85 }
wataaki 0:5b422753a79e 86
wataaki 0:5b422753a79e 87