Class module for NCP5623B I2C LED driver
Dependents: mDotEVBM2X MTDOT-EVB-LinkCheck-AL MTDOT-EVBDemo-DRH MTDOT_BOX_EVB_Blinky ... more
NCP5623B.cpp
- Committer:
- mfiore
- Date:
- 2015-10-27
- Revision:
- 1:f0efe8462d0e
- Parent:
- 0:b28a2dfe05fd
- Child:
- 2:9c70b63e3b1e
File content as of revision 1:f0efe8462d0e:
/** * @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; }