CQ_I2C_book
8-bit Fm+ I2C-bus 100 mA 40 V LED driver
Dependencies: mbed
Revision 0:5b422753a79e, committed 2015-02-04
- Comitter:
- wataaki
- Date:
- Wed Feb 04 06:05:59 2015 +0000
- Commit message:
- Initial version
Changed in this revision
diff -r 000000000000 -r 5b422753a79e PCA9624.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/PCA9624.cpp Wed Feb 04 06:05:59 2015 +0000
@@ -0,0 +1,87 @@
+#include "mbed.h"
+#include "PCA9624.h"
+
+I2C i2c(p28,p27); // sda, scl
+Serial pc(USBTX, USBRX); // tx, rx
+char cmd[32];
+int i, j;
+
+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("PCA9624 Sample Program\r\n");
+
+ set_ch(2); // PCA9624はch1に接続
+
+ // PCA9624
+ cmd[0] = MODE1;
+ cmd[1] = 0x0; // SLEEP = 0
+ i2c.write(PCA9624_ADDR, cmd, 2); // cmd[0]Regにcmd[1]を書込み
+
+ cmd[0] = LEDOUT0 + 0x80; // LEDOUT0, Auto incriment
+ cmd[1] = 0xaa; // LED3,2,1,0 10= PWM
+ cmd[2] = 0xaa; // LED7,6,5,4 10= PWM
+ i2c.write(PCA9624_ADDR, cmd, 3); // cmd[0]Regにcmd[1-2]を書込み
+
+ while(1)
+ {
+ if (i>7) i = 0; // 0-7を循環
+ cmd[0] = PWM0 + 0x80; // PWM0, Auto incriment
+ for(j=0; j<8; j++) cmd[j+1] = 0x0; // PWM = 0%
+ cmd[i+1] = 0xff; // PWM = 99.6%
+ i2c.write(PCA9624_ADDR, cmd, 9); // cmd[0]Regにcmd[1-16]を書込み
+ wait(1.0);
+ i++;
+ }
+}
+
+
diff -r 000000000000 -r 5b422753a79e PCA9624.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/PCA9624.h Wed Feb 04 06:05:59 2015 +0000 @@ -0,0 +1,20 @@ +#define PCA9624_ADDR 0x80 + +#define MODE1 0x00 +#define MODE2 0x01 +#define PWM0 0x02 +#define PWM1 0x03 +#define PWM2 0x04 +#define PWM3 0x05 +#define PWM4 0x06 +#define PWM5 0x07 +#define PWM6 0x08 +#define PWM7 0x09 +#define GRPPWM 0x0a +#define GRPFREQ 0x0b +#define LEDOUT0 0x0c +#define LEDOUT1 0x0d +#define SUBADR1 0x0e +#define SUBADR2 0x0f +#define SUBADR3 0x10 +#define ALLCALLADR 0x11
diff -r 000000000000 -r 5b422753a79e mbed.bld --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Wed Feb 04 06:05:59 2015 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/552587b429a1 \ No newline at end of file