Diff: LEDDriver.cpp

Revision:

0:943820483318

Child:

1:c279bc3af90c

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/LEDDriver.cpp	Tue Jan 13 11:23:01 2015 +0000
@@ -0,0 +1,51 @@
+#include "LEDDriver.h"
+#include "mbed.h"
+#define DEBUG "LEDDriver.cpp"
+#include "Logger.h"
+#include <cassert>
+
+LEDDriver::LEDDriver(I2C &i2c) : I2CPeripheral(i2c, 0x60 /* I2C address of the LED controller */) {
+    // cf. LP5562TME/NOPB datasheet page 14
+    // Supply 3.6V to VDD (hardware - done)
+    // Supply 1.8V to EN (hardware - done)
+    wait_ms(1); // wait 1 ms
+    write_reg(0x00, 0xC0); // chip_en to 1, log_en to 1
+    wait_us(500); // wait 500 usec
+    write_reg(0x08, 0x61); // set PWM freq high, enable power save mode, start internal clock
+    write_reg(0x70, 0x00); // configure all LEDs to be controlled from I2C registers
+    
+    setColor(Colors::black);
+}
+
+void LEDDriver::setColor(const uint8_t r, const uint8_t g, const uint8_t b) {
+    write_reg(0x04, r);
+    write_reg(0x03, g);
+    write_reg(0x02, b);
+}
+
+void LEDDriver::setColor(const float r, const float g, const float b)
+{
+    setColor(r * 255, g * 255, b * 255);
+}
+
+void LEDDriver::setColor(const Color color)
+{
+    const uint8_t r = (color >> 16) & 0xff;
+    const uint8_t g = (color >> 8) & 0xff;
+    const uint8_t b = (color >> 0) & 0xff;
+    setColor(r, g, b);
+}
+
+LEDDriver& LEDDriver::operator=(const Color& c) {
+    setColor(c);
+    return *this;
+}
+
+void LEDDriver::setOutputCurrent(const float mA) {
+    assert(mA <= 25.5);
+    assert(mA >= 0.1);
+    write_reg(0x05, mA * 10);
+    write_reg(0x06, mA * 10);
+    write_reg(0x07, mA * 10);
+    INFO("LED output current => %0.1f mA", mA);
+}