Diff: NCP5623B.cpp

Revision:

0:b28a2dfe05fd

Child:

1:f0efe8462d0e

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/NCP5623B.cpp	Mon Jul 06 19:29:08 2015 +0000
@@ -0,0 +1,148 @@
+/**
+ * @file    NCP5623B.cpp
+ * @brief   Device driver - NCP5623B Triple LED Driver IC w/RTOS support
+ * @author  Tim Barr
+ * @version 1.0
+ * @see     http://www.onsemi.com/pub/Collateral/NCP5623B-D.PDF
+ *
+ * Copyright (c) 2015
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+ 
+#include "NCP5623B.h"
+#include "mbed_debug.h"
+#include "rtos.h"
+ 
+NCP5623B::NCP5623B(I2C &i2c)
+{
+    _i2c =  &i2c;
+
+    NCP5623B::init();
+    
+    return;
+}
+
+uint8_t NCP5623B::init(void)
+{
+    uint8_t result = 0;
+    
+    _i2c->frequency(400000);
+    
+    // Turn off all LEDs and initialize all registers
+	result |= NCP5623B::writeRegister(NCP5623B::DIMDWNSET, 0x00);
+    result |= NCP5623B::writeRegister(NCP5623B::DIMTIME, 0x01);
+    osDelay (1000);
+    result |= NCP5623B::writeRegister(NCP5623B::LEDCURR, 0x00);
+	result |= NCP5623B::writeRegister(NCP5623B::PWMLED1, 0x00);
+	result |= NCP5623B::writeRegister(NCP5623B::PWMLED2, 0x00);
+	result |= NCP5623B::writeRegister(NCP5623B::PWMLED3, 0x00);
+
+    if(result != 0)
+    {
+        debug("ILS29011:init failed\n\r");
+    }
+    
+     return result;
+}
+
+	/** Shutdown LEDS
+	 *  @return status of command
+	 */
+uint8_t NCP5623B::shutdown(void) const
+{
+	uint8_t result = 0;
+
+    result |= NCP5623B::writeRegister(NCP5623B::SHUTDWN, 0x00);
+    return result;
+
+}
+
+/** Set static LED Current
+ *  data - value of current draw for all LEDs range 0-31
+ *  @return status of command
+ */
+uint8_t NCP5623B::setLEDCurrent(uint8_t data) const
+{
+	uint8_t result = 0;
+
+    result |= NCP5623B::writeRegister(NCP5623B::LEDCURR, data);
+    return result;
+}
+
+	/** Set PWM mode for specific LED
+	 *  @lednum - selects LED
+	 *  @data - PWM value to set  range 0-31 0-100% Pulse width
+	 *  @return status of command
+	 */
+uint8_t NCP5623B::setPWM(LEDNUM lednum, int8_t data ) const
+{
+	uint8_t result = 0;
+
+	switch (lednum) {
+	case NCP5623B::LED_1:
+		result |= NCP5623B::writeRegister(NCP5623B::PWMLED1, data);
+		break;
+	case NCP5623B::LED_2:
+		result |= NCP5623B::writeRegister(NCP5623B::PWMLED2, data);
+		break;
+	case NCP5623B::LED_3:
+		result |= NCP5623B::writeRegister(NCP5623B::PWMLED3, data);
+		break;
+	}
+    return result;
+}
+
+    /** Set Dimming mode for all LEDs
+     *  @dimdir - direction of dimming
+     *  @endstep - ending step of ramp up or ramp down range 0-31
+     *  @steptime - time per step range 0-31 in 8 msec multiples
+     *  @return status of command
+     */
+    uint8_t NCP5623B::setDimming(DIMDIRECTION dimdir, uint8_t endstep, uint8_t steptime) const
+{
+    	uint8_t result = 0;
+
+    	if (dimdir == NCP5623B::DIMDWN)
+    		result |= NCP5623B::writeRegister(NCP5623B::DIMDWNSET, endstep);
+    	else
+    		result |= NCP5623B::writeRegister(NCP5623B::DIMUPSET, endstep);
+
+        result |= NCP5623B::writeRegister(NCP5623B::DIMTIME, steptime);
+
+        return result;
+}
+    /** Write to a register (exposed for debugging reasons)
+     * @param reg - The register to be written
+     * @param data - The data to be written
+     */
+uint8_t NCP5623B::writeRegister(NCP5623B::REGISTER const reg, uint8_t const data) const
+{
+    char buf[1];
+    uint8_t result = 0;
+
+    buf[0] = reg | (data & NCP5623B::DATAMASK);
+    
+//    __disable_irq();  // // Tickers and other timebase events can jack up the I2C bus for some devices
+    result |= _i2c->write(_i2c_addr, buf, 1);
+//    __enable_irq();  // Just need to block during the transaction
+
+    if(result != 0)
+    {
+        debug("NCP5623B:writeRegister failed\n\r");
+    }
+    
+    return result;
+}
+
+