Class module for NCP5623B I2C LED driver
Dependents: mDotEVBM2X MTDOT-EVB-LinkCheck-AL MTDOT-EVBDemo-DRH MTDOT_BOX_EVB_Blinky ... more
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; +} + +