CQ_I2C_book / Mbed 2 deprecated PCA9955A

16-channel Fm+ I2C-bus 57 mA/20 V constant current LED driver

Dependencies:   mbed

PCA9955A.cpp@0:a872e4dd8ec3, 2015-02-04 (annotated)

Committer:
wataaki
Date:
Wed Feb 04 06:09:08 2015 +0000
Revision:
0:a872e4dd8ec3
Initial version

Who changed what in which revision?

UserRevisionLine numberNew contents of line
wataaki 0:a872e4dd8ec3 1 #include "mbed.h"
wataaki 0:a872e4dd8ec3 2 #include "PCA9955A.h"
wataaki 0:a872e4dd8ec3 3
wataaki 0:a872e4dd8ec3 4 I2C i2c(p28,p27); // sda, scl
wataaki 0:a872e4dd8ec3 5 Serial pc(USBTX, USBRX); // tx, rx
wataaki 0:a872e4dd8ec3 6 char cmd[32];
wataaki 0:a872e4dd8ec3 7 int i, j, k;
wataaki 0:a872e4dd8ec3 8 int sw;
wataaki 0:a872e4dd8ec3 9
wataaki 0:a872e4dd8ec3 10 void set_ch(char sel)
wataaki 0:a872e4dd8ec3 11 { // PCA9541のサンプル
wataaki 0:a872e4dd8ec3 12 // MST_0側の自分にスレーブ側の制御権を得る場合
wataaki 0:a872e4dd8ec3 13 cmd[0] = 1; // PCA9541 コマンドコード Cont Reg
wataaki 0:a872e4dd8ec3 14 i2c.write( 0xe2, cmd, 1); // Cont Regを指定
wataaki 0:a872e4dd8ec3 15 i2c.read( 0xe2, cmd, 1); // Cont Regを読込み
wataaki 0:a872e4dd8ec3 16 wait(0.1); // 0.1s待つ
wataaki 0:a872e4dd8ec3 17 switch(cmd[0] & 0xf)
wataaki 0:a872e4dd8ec3 18 {
wataaki 0:a872e4dd8ec3 19 case 0: // bus off, has control
wataaki 0:a872e4dd8ec3 20 case 1: // bus off, no control
wataaki 0:a872e4dd8ec3 21 case 5: // bus on, no control
wataaki 0:a872e4dd8ec3 22 cmd[0] = 1; // PCA9541 コマンドコード Cont Reg
wataaki 0:a872e4dd8ec3 23 cmd[1] = 4; // bus on, has control
wataaki 0:a872e4dd8ec3 24 i2c.write( 0xe2, cmd, 2); // Cont Regにcmd[1]を書込み
wataaki 0:a872e4dd8ec3 25 i2c.read( 0xe2, cmd, 1); // Cont Regを読込み
wataaki 0:a872e4dd8ec3 26 break;
wataaki 0:a872e4dd8ec3 27 case 2: // bus off, no control
wataaki 0:a872e4dd8ec3 28 case 3: // bus off, has control
wataaki 0:a872e4dd8ec3 29 case 6: // bus on, no control
wataaki 0:a872e4dd8ec3 30 cmd[0] = 1; // PCA9541 コマンドコード Cont Reg
wataaki 0:a872e4dd8ec3 31 cmd[1] = 5; // bus on, has control
wataaki 0:a872e4dd8ec3 32 i2c.write( 0xe2, cmd, 2); // Cont Regにcmd[1]を書込み
wataaki 0:a872e4dd8ec3 33 i2c.read( 0xe2, cmd, 1); // Cont Regを読込み
wataaki 0:a872e4dd8ec3 34 break;
wataaki 0:a872e4dd8ec3 35 case 9: // bus on, no control
wataaki 0:a872e4dd8ec3 36 case 0xc: // bus on, no control
wataaki 0:a872e4dd8ec3 37 case 0xd: // bus off, no control
wataaki 0:a872e4dd8ec3 38 cmd[0] = 1; // PCA9541 コマンドコード Cont Reg
wataaki 0:a872e4dd8ec3 39 cmd[1] = 0; // bus on, has control
wataaki 0:a872e4dd8ec3 40 i2c.write( 0xe2, cmd, 2); // Cont Regにcmd[1]を書込み
wataaki 0:a872e4dd8ec3 41 i2c.read( 0xe2, cmd, 1); // Cont Regを読込み
wataaki 0:a872e4dd8ec3 42 break;
wataaki 0:a872e4dd8ec3 43 case 0xa: // bus on, no control
wataaki 0:a872e4dd8ec3 44 case 0xe: // bus off, no control
wataaki 0:a872e4dd8ec3 45 case 0xf: // bus on, has control
wataaki 0:a872e4dd8ec3 46 cmd[0] = 1; // PCA9541 コマンドコード Cont Reg
wataaki 0:a872e4dd8ec3 47 cmd[1] = 1; // bus on, has control
wataaki 0:a872e4dd8ec3 48 i2c.write( 0xe2, cmd, 2); // Cont Regにcmd[1]を書込み
wataaki 0:a872e4dd8ec3 49 i2c.read( 0xe2, cmd, 1); // Cont Regを読込み
wataaki 0:a872e4dd8ec3 50 break;
wataaki 0:a872e4dd8ec3 51 default:
wataaki 0:a872e4dd8ec3 52 break;
wataaki 0:a872e4dd8ec3 53 }
wataaki 0:a872e4dd8ec3 54
wataaki 0:a872e4dd8ec3 55 cmd[0] = sel; // PCA9546 Cont Reg sel channel enabled
wataaki 0:a872e4dd8ec3 56 i2c.write( 0xe8, cmd, 1); // Send command string
wataaki 0:a872e4dd8ec3 57 }
wataaki 0:a872e4dd8ec3 58
wataaki 0:a872e4dd8ec3 59 int main ()
wataaki 0:a872e4dd8ec3 60 {
wataaki 0:a872e4dd8ec3 61 i2c.frequency(100000);
wataaki 0:a872e4dd8ec3 62 pc.printf("PCA9955A Sample Program\r\n");
wataaki 0:a872e4dd8ec3 63
wataaki 0:a872e4dd8ec3 64 set_ch(1); // PCA9955Aはch0に接続
wataaki 0:a872e4dd8ec3 65
wataaki 0:a872e4dd8ec3 66 // PCA9955A
wataaki 0:a872e4dd8ec3 67 while(1)
wataaki 0:a872e4dd8ec3 68 {
wataaki 0:a872e4dd8ec3 69 pc.printf("シーケンシャル … 1, グラデーション … 2 ? \r\n");
wataaki 0:a872e4dd8ec3 70 pc.scanf("%d", &sw);
wataaki 0:a872e4dd8ec3 71 pc.printf("%d\r\n", sw);
wataaki 0:a872e4dd8ec3 72 switch (sw)
wataaki 0:a872e4dd8ec3 73 {
wataaki 0:a872e4dd8ec3 74 case 1:
wataaki 0:a872e4dd8ec3 75 pc.printf("シーケンシャル Sample Start\r\n");
wataaki 0:a872e4dd8ec3 76
wataaki 0:a872e4dd8ec3 77 cmd[0] = MODE1;
wataaki 0:a872e4dd8ec3 78 cmd[1] = 0x0; // SLEEP = 0
wataaki 0:a872e4dd8ec3 79 i2c.write(PCA9955A_ADDR, cmd, 2); // cmd[0]Regにcmd[1]を書込み
wataaki 0:a872e4dd8ec3 80
wataaki 0:a872e4dd8ec3 81 cmd[0] = LEDOUT0 + 0x80; // LEDOUT0, Auto incriment
wataaki 0:a872e4dd8ec3 82 cmd[1] = 0xaa; // LED3,2,1,0 10= PWM
wataaki 0:a872e4dd8ec3 83 cmd[2] = 0xaa; // LED7,6,5,4 10= PWM
wataaki 0:a872e4dd8ec3 84 cmd[3] = 0xaa; // LED11,10,9,8 10= PWM
wataaki 0:a872e4dd8ec3 85 cmd[4] = 0xaa; // LED15,14,13,12 10= PWM
wataaki 0:a872e4dd8ec3 86 i2c.write(PCA9955A_ADDR, cmd, 5); // cmd[0]Regにcmd[1-4]を書込み
wataaki 0:a872e4dd8ec3 87
wataaki 0:a872e4dd8ec3 88 cmd[0] = IREF0 + 0x80; // IREF0, Auto incriment
wataaki 0:a872e4dd8ec3 89 for(i=0; i<16; i++) cmd[i+1] = 0x80; // all IREF = 50%
wataaki 0:a872e4dd8ec3 90 i2c.write(PCA9955A_ADDR, cmd, 17); // cmd[0]Regにcmd[1-16]を書込み
wataaki 0:a872e4dd8ec3 91
wataaki 0:a872e4dd8ec3 92 for(k=0; k<3; k++) // 3回繰返す
wataaki 0:a872e4dd8ec3 93 {
wataaki 0:a872e4dd8ec3 94 for(i=0; i<16; i++) // チャネル0～15まで一つずつ点灯
wataaki 0:a872e4dd8ec3 95 {
wataaki 0:a872e4dd8ec3 96 cmd[0] = PWM0 + 0x80; // PWM0, Auto incriment
wataaki 0:a872e4dd8ec3 97 for(j=0; j<16; j++) cmd[j+1] = 0x0; // all LED PWM = 0%
wataaki 0:a872e4dd8ec3 98 cmd[i+1] = 0xff; // iチャネルのLED PWM = 99.6%
wataaki 0:a872e4dd8ec3 99 i2c.write(PCA9955A_ADDR, cmd, 17); // cmd[0]Regにcmd[1-16]を書込み
wataaki 0:a872e4dd8ec3 100 wait(0.5);
wataaki 0:a872e4dd8ec3 101 }
wataaki 0:a872e4dd8ec3 102 }
wataaki 0:a872e4dd8ec3 103 pc.printf("シーケンシャル Sample End\r\n");
wataaki 0:a872e4dd8ec3 104 break;
wataaki 0:a872e4dd8ec3 105 case 2:
wataaki 0:a872e4dd8ec3 106 pc.printf("グラデーション Sample Start\r\n");
wataaki 0:a872e4dd8ec3 107
wataaki 0:a872e4dd8ec3 108 cmd[0] = MODE1;
wataaki 0:a872e4dd8ec3 109 cmd[1] = 0x0; // SLEEP = 0
wataaki 0:a872e4dd8ec3 110 i2c.write(PCA9955A_ADDR, cmd, 2); // cmd[0]Regにcmd[1]を書込み
wataaki 0:a872e4dd8ec3 111
wataaki 0:a872e4dd8ec3 112 cmd[0] = LEDOUT0 + 0x80; // LEDOUT0, Auto incriment
wataaki 0:a872e4dd8ec3 113 cmd[1] = 0x55; // LED3,2,1,0 01= ON
wataaki 0:a872e4dd8ec3 114 cmd[2] = 0x05; // LED7,6 00= OFF LED5,4 01= ON
wataaki 0:a872e4dd8ec3 115 cmd[3] = 0x00; // LED11,10,9,8 00= OFF
wataaki 0:a872e4dd8ec3 116 cmd[4] = 0x00; // LED15,14,13,12 00= OFF
wataaki 0:a872e4dd8ec3 117 i2c.write(PCA9955A_ADDR, cmd, 5); // cmd[0]Regにcmd[1-4]を書込み
wataaki 0:a872e4dd8ec3 118
wataaki 0:a872e4dd8ec3 119 /* cmd[0] = PWMALL;
wataaki 0:a872e4dd8ec3 120 cmd[1] = 0xFF; // PWM = 99.6%
wataaki 0:a872e4dd8ec3 121 i2c.write(PCA9955A_ADDR, cmd, 2); // cmd[0]Regにcmd[1]を書込み
wataaki 0:a872e4dd8ec3 122 */
wataaki 0:a872e4dd8ec3 123 cmd[0] = GRAD_GRP_SEL1;
wataaki 0:a872e4dd8ec3 124 cmd[1] = 0x50; // LED3, 4 = GRP0
wataaki 0:a872e4dd8ec3 125 i2c.write(PCA9955A_ADDR, cmd, 2); // cmd[0]Regにcmd[1]を書込み
wataaki 0:a872e4dd8ec3 126
wataaki 0:a872e4dd8ec3 127 cmd[0] = IREFALL; //
wataaki 0:a872e4dd8ec3 128 cmd[1] = 0x1; // あとでIREF_GRP0で設定するので1以上であればよい
wataaki 0:a872e4dd8ec3 129 i2c.write(PCA9955A_ADDR, cmd, 2); // cmd[0]Regにcmd[1]を書込み
wataaki 0:a872e4dd8ec3 130 /* cmd[0] = IREF4; //
wataaki 0:a872e4dd8ec3 131 cmd[1] = 0x1; // Idrv = 240 * 40uA(Rext = 5.6k)=9.6mA
wataaki 0:a872e4dd8ec3 132 i2c.write(PCA9955A_ADDR, cmd, 2); // cmd[0]Regにcmd[1]を書込み
wataaki 0:a872e4dd8ec3 133 */
wataaki 0:a872e4dd8ec3 134 cmd[0] = GRAD_MODE_SEL0;
wataaki 0:a872e4dd8ec3 135 cmd[1] = 0x31; // LED0, 4, 5 = Gradation
wataaki 0:a872e4dd8ec3 136 i2c.write(PCA9955A_ADDR, cmd, 2); // cmd[0]Regにcmd[1]を書込み
wataaki 0:a872e4dd8ec3 137
wataaki 0:a872e4dd8ec3 138 cmd[0] = GRAD_GRP_SEL0;
wataaki 0:a872e4dd8ec3 139 cmd[1] = 0x0; // LED0, 1, 2, 3 = GRP0
wataaki 0:a872e4dd8ec3 140 i2c.write(PCA9955A_ADDR, cmd, 2); // cmd[0]Regにcmd[1]を書込み
wataaki 0:a872e4dd8ec3 141
wataaki 0:a872e4dd8ec3 142
wataaki 0:a872e4dd8ec3 143 cmd[0] = IREF_GRP0;
wataaki 0:a872e4dd8ec3 144 cmd[1] = 0xF0; // Idrv = 240 * 40uA(Rext = 5.6k)=9.6mA
wataaki 0:a872e4dd8ec3 145 i2c.write(PCA9955A_ADDR, cmd, 2); // cmd[0]Regにcmd[1]を書込み
wataaki 0:a872e4dd8ec3 146
wataaki 0:a872e4dd8ec3 147 cmd[0] = STEP_TIME_GRP0;
wataaki 0:a872e4dd8ec3 148 cmd[1] = 0x3F; // 0.5ms * 64 = 32ms
wataaki 0:a872e4dd8ec3 149 i2c.write(PCA9955A_ADDR, cmd, 2); // cmd[0]Regにcmd[1]を書込み
wataaki 0:a872e4dd8ec3 150
wataaki 0:a872e4dd8ec3 151 cmd[0] = RAMP_RATE_GRP0;
wataaki 0:a872e4dd8ec3 152 cmd[1] = 0xc0 + 0x31; // Ramp up/down ON, Ramp rate = 50
wataaki 0:a872e4dd8ec3 153 i2c.write(PCA9955A_ADDR, cmd, 2); // cmd[0]Regにcmd[1]を書込み
wataaki 0:a872e4dd8ec3 154
wataaki 0:a872e4dd8ec3 155 cmd[0] = HOLD_CNTL_GRP0;
wataaki 0:a872e4dd8ec3 156 cmd[1] = 0xc0 + (0x1 << 3) + 0x2; // Hold ON/OFF ON, ON = 0.25s, OFF = 0.5s
wataaki 0:a872e4dd8ec3 157 i2c.write(PCA9955A_ADDR, cmd, 2); // cmd[0]Regにcmd[1]を書込み
wataaki 0:a872e4dd8ec3 158
wataaki 0:a872e4dd8ec3 159 cmd[0] = GRAD_CNTL;
wataaki 0:a872e4dd8ec3 160 cmd[1] = 0x3; // Gradation ON, Continuous
wataaki 0:a872e4dd8ec3 161 i2c.write(PCA9955A_ADDR, cmd, 2); // cmd[0]Regにcmd[1]を書込み
wataaki 0:a872e4dd8ec3 162
wataaki 0:a872e4dd8ec3 163 wait(15); // 15s 待つ
wataaki 0:a872e4dd8ec3 164
wataaki 0:a872e4dd8ec3 165 cmd[0] = GRAD_CNTL;
wataaki 0:a872e4dd8ec3 166 cmd[1] = 0x0; // Gradation OFF
wataaki 0:a872e4dd8ec3 167 i2c.write(PCA9955A_ADDR, cmd, 2); // cmd[0]Regにcmd[1]を書込み
wataaki 0:a872e4dd8ec3 168
wataaki 0:a872e4dd8ec3 169 cmd[0] = GRAD_MODE_SEL0;
wataaki 0:a872e4dd8ec3 170 cmd[1] = 0x0; // LED0, 4, 5 = Normal
wataaki 0:a872e4dd8ec3 171 i2c.write(PCA9955A_ADDR, cmd, 2); // cmd[0]Regにcmd[1]を書込み
wataaki 0:a872e4dd8ec3 172
wataaki 0:a872e4dd8ec3 173 pc.printf("グラデーション Sample End\r\n");
wataaki 0:a872e4dd8ec3 174 break;
wataaki 0:a872e4dd8ec3 175 default:
wataaki 0:a872e4dd8ec3 176 break;
wataaki 0:a872e4dd8ec3 177 }
wataaki 0:a872e4dd8ec3 178 }
wataaki 0:a872e4dd8ec3 179 }
wataaki 0:a872e4dd8ec3 180