Diff: PCA9634.cpp

Revision:

1:40bdbe1a93b7

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PCA9634.cpp	Fri Jun 22 02:09:50 2018 +0000
@@ -0,0 +1,64 @@
+
+#include "PCA9634.h"
+
+PCA9634::PCA9634(I2C *i2c, DigitalOut *inv_out_en, int addr)
+: i2c_(i2c), inv_out_en_(inv_out_en), addr_(addr) {
+    *inv_out_en_ = 0;
+    
+    // Set Mode 1: Auto-increment on, oscillator on, do not respond to all-call
+    writeReg(PCA9634_REG_MODE1, 0x80);
+    // Set Mode 2: Don't invert logic, outputs change on ACK, LED outputs configured
+    // in open-drain structure
+    writeReg(PCA9634_REG_MODE2, 0x09);
+    dimLEDs();
+    // Set all LED driver output states to PWM
+    led_out_state_[0] = PCA9634_ALL_LED_TO_PWM;
+    led_out_state_[1] = PCA9634_ALL_LED_TO_PWM;
+    
+    commandLEDOutState();
+}
+
+void PCA9634::dimLEDs() {
+    for (char reg = PCA_LED0; reg <= PCA_LED7; reg++)
+        writeReg(reg, 0);
+}
+
+void PCA9634::disableLED(ledID led) {
+    // Set correct registers to 00
+    if (led < LED4) {
+        led_out_state_[0] &= ~(1UL << (2*(led-2)));
+        led_out_state_[0] &= ~(1UL << (2*(led-2)+1));
+    } else {
+        led_out_state_[1] &= ~(1UL << (2*(led-6)));
+        led_out_state_[1] &= ~(1UL << (2*(led-6)+1));
+    }
+    commandLEDOutState();
+}
+
+void PCA9634::enableLED(ledID led) {
+    // Set correct registers to 01
+    if (led < LED4) {
+        led_out_state_[0] |= (1UL << (2*(led-2)));
+        led_out_state_[0] &= ~(1UL << (2*(led-2)+1));
+    } else {
+        led_out_state_[1] |= (1UL << (2*(led-6)));
+        led_out_state_[1] &= ~(1UL << (2*(led-6)+1));
+    }
+    commandLEDOutState();
+}
+
+void PCA9634::commandLEDOutState() {
+    writeReg(PCA9634_REG_LEDOUT0, led_out_state_[0]);
+    writeReg(PCA9634_REG_LEDOUT1, led_out_state_[1]);   
+}
+
+void PCA9634::commandLEDBrightness(ledID led, int brightness) {
+    writeReg(led, (char) brightness);
+}
+
+int PCA9634::writeReg(char reg, char value) {
+    char cmd[2];
+    cmd[0] = reg;
+    cmd[1] = value;
+    return i2c_->write(addr_, cmd, 2);
+}
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