diff options
Diffstat (limited to 'peripheral/libupm/src/lp8860/lp8860.cxx')
| -rw-r--r-- | peripheral/libupm/src/lp8860/lp8860.cxx | 284 |
1 files changed, 0 insertions, 284 deletions
diff --git a/peripheral/libupm/src/lp8860/lp8860.cxx b/peripheral/libupm/src/lp8860/lp8860.cxx deleted file mode 100644 index 97db81b..0000000 --- a/peripheral/libupm/src/lp8860/lp8860.cxx +++ /dev/null @@ -1,284 +0,0 @@ -/* - * Author: Henry Bruce <henry.bruce@intel.com> - * Copyright (c) 2014 Intel Corporation. - * - * Permission is hereby granted, free of charge, to any person obtaining - * a copy of this software and associated documentation files (the - * "Software"), to deal in the Software without restriction, including - * without limitation the rights to use, copy, modify, merge, publish, - * distribute, sublicense, and/or sell copies of the Software, and to - * permit persons to whom the Software is furnished to do so, subject to - * the following conditions: - * - * The above copyright notice and this permission notice shall be - * included in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, - * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF - * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND - * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE - * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION - * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION - * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - -#include <iostream> -#include <unistd.h> -#include <string.h> -#include "lp8860.hpp" -#include "mraa-utils.hpp" - -// Used to prevent silent failure in mraa_i2c_write() -// Value come from I2C_SMBUS_I2C_BLOCK_MAX in i2c driver -#define MAX_I2C_WRITE_SIZE 32 - -#define LP8860_I2C_ADDR 0x2D - -#define LP8860_DISP_CL1_BRT_MSB 0x00 -#define LP8860_DISP_CL1_BRT_LSB 0x01 -#define LP8860_DISP_CL1_CURR_MSB 0x02 -#define LP8860_DISP_CL1_CURR_LSB 0x03 -#define LP8860_CL2_BRT_MSB 0x04 -#define LP8860_CL2_BRT_LSB 0x05 -#define LP8860_CL2_CURRENT 0x06 -#define LP8860_CL3_BRT_MSB 0x07 -#define LP8860_CL3_BRT_LSB 0x08 -#define LP8860_CL3_CURRENT 0x09 -#define LP8860_CL4_BRT_MSB 0x0a -#define LP8860_CL4_BRT_LSB 0x0b -#define LP8860_CL4_CURRENT 0x0c -#define LP8860_CONFIG 0x0d -#define LP8860_STATUS 0x0e -#define LP8860_FAULT 0x0f -#define LP8860_LED_FAULT 0x10 -#define LP8860_FAULT_CLEAR 0x11 -#define LP8860_ID 0x12 -#define LP8860_TEMP_MSB 0x13 -#define LP8860_TEMP_LSB 0x14 -#define LP8860_DISP_LED_CURR_MSB 0x15 -#define LP8860_DISP_LED_CURR_LSB 0x16 -#define LP8860_DISP_LED_PWM_MSB 0x17 -#define LP8860_DISP_LED_PWM_LSB 0x18 -#define LP8860_EEPROM_CNTRL 0x19 -#define LP8860_EEPROM_UNLOCK 0x1a - -#define LP8860_EEPROM_REG_0 0x60 -#define LP8860_EEPROM_REG_1 0x61 -#define LP8860_EEPROM_REG_2 0x62 -#define LP8860_EEPROM_REG_3 0x63 -#define LP8860_EEPROM_REG_4 0x64 -#define LP8860_EEPROM_REG_5 0x65 -#define LP8860_EEPROM_REG_6 0x66 -#define LP8860_EEPROM_REG_7 0x67 -#define LP8860_EEPROM_REG_8 0x68 -#define LP8860_EEPROM_REG_9 0x69 -#define LP8860_EEPROM_REG_10 0x6a -#define LP8860_EEPROM_REG_11 0x6b -#define LP8860_EEPROM_REG_12 0x6c -#define LP8860_EEPROM_REG_13 0x6d -#define LP8860_EEPROM_REG_14 0x6e -#define LP8860_EEPROM_REG_15 0x6f -#define LP8860_EEPROM_REG_16 0x70 -#define LP8860_EEPROM_REG_17 0x71 -#define LP8860_EEPROM_REG_18 0x72 -#define LP8860_EEPROM_REG_19 0x73 -#define LP8860_EEPROM_REG_20 0x74 -#define LP8860_EEPROM_REG_21 0x75 -#define LP8860_EEPROM_REG_22 0x76 -#define LP8860_EEPROM_REG_23 0x77 -#define LP8860_EEPROM_REG_24 0x78 - -#define LP8860_LOCK_EEPROM 0x00 -#define LP8860_UNLOCK_EEPROM 0x01 -#define LP8860_LOAD_EEPROM 0x01 -#define LP8860_PROGRAM_EEPROM 0x02 -#define LP8860_EEPROM_CODE_1 0x08 -#define LP8860_EEPROM_CODE_2 0xba -#define LP8860_EEPROM_CODE_3 0xef - -#define LP8860_CLEAR_FAULTS 0x01 -#define LP8860_INVALID_ID 0x00 - -using namespace upm; - -LP8860::LP8860(int gpioPower, int i2cBus) -{ - status = mraa::ERROR_INVALID_RESOURCE; - mraa_set_log_level(7); - pinPower = gpioPower; - i2c = new mraa::I2c(i2cBus); - i2c->address(LP8860_I2C_ADDR); - if (isAvailable()) - status = mraa::SUCCESS; - if (status != mraa::SUCCESS) - UPM_THROW("i2c config failed."); -} - -LP8860::~LP8860() -{ - delete i2c; -} - - -bool LP8860::isAvailable() -{ - bool wasPowered = true; - - // Check power state - if(!isPowered()) { - wasPowered = false; - MraaUtils::setGpio(pinPower, 1); - } - - // Read ID register - // mraa_i2c_address(i2c, LP8860_I2C_ADDR); - uint8_t id = i2c->readReg(LP8860_ID); - // Turn off to save power if not required - if (!wasPowered) - MraaUtils::setGpio(pinPower, 0); - - return id >= 0x10; -} - - -bool LP8860::isPowered() -{ - return MraaUtils::getGpio(pinPower); -} - - -void LP8860::setPowerOn() -{ - if (!isPowered()) - { - MraaUtils::setGpio(pinPower, 1); - setBrightness(0); - loadEEPROM(); - allowMaxCurrent(); - } -} - - -void LP8860::setPowerOff() -{ - MraaUtils::setGpio(pinPower, 0); -} - - -int LP8860::getBrightness() -{ - uint8_t msb = i2cReadByte(LP8860_DISP_CL1_BRT_MSB); - uint8_t lsb = i2cReadByte(LP8860_DISP_CL1_BRT_LSB); - int percent = (100 * ((int)msb << 8 | lsb)) / 0xFFFF; - return percent; -} - - -void LP8860::setBrightness(int dutyPercent) -{ - int value = (0xFFFF * dutyPercent) / 100; - int msb = value >> 8; - int lsb = value & 0xFF; - i2cWriteByte(LP8860_DISP_CL1_BRT_MSB, msb); - i2cWriteByte(LP8860_DISP_CL1_BRT_LSB, lsb); - value = (0x1FFF * dutyPercent) / 100; - msb = value >> 8; - lsb = value & 0xFF; - i2cWriteByte(LP8860_CL2_BRT_MSB, msb); - i2cWriteByte(LP8860_CL2_BRT_LSB, lsb); - i2cWriteByte(LP8860_CL3_BRT_MSB, msb); - i2cWriteByte(LP8860_CL3_BRT_LSB, lsb); - i2cWriteByte(LP8860_CL4_BRT_MSB, msb); - i2cWriteByte(LP8860_CL4_BRT_LSB, lsb); -} - - -void LP8860::loadEEPROM() -{ - const int eepromTableSize = 0x19; - uint8_t eepromInitTable[] = { - 0xEF, 0xFF, 0xDC, 0xAE, 0x5F, 0xE5, 0xF2, 0x77, - 0x77, 0x71, 0x3F, 0xB7, 0x17, 0xEF, 0xB0, 0x87, - 0xCF, 0x72, 0xC5, 0xDE, 0x35, 0x06, 0xDE, 0xFF, - 0x3E - }; - - uint8_t* buf = new unsigned char[eepromTableSize + 1]; - - // Load EEPROM - // printf("Loading LP8860 EEPROM\n"); - i2cWriteByte(LP8860_EEPROM_CNTRL, LP8860_LOAD_EEPROM); - usleep(100000); - - // Check contents and program if not already done - i2cReadBuffer(LP8860_EEPROM_REG_0, buf, eepromTableSize); - if (memcmp(eepromInitTable, buf, eepromTableSize) != 0) - { - printf("LP8860 EEPROM not initialized - programming...\n"); - // Unlock EEPROM - i2cWriteByte(LP8860_EEPROM_UNLOCK, LP8860_EEPROM_CODE_1); - i2cWriteByte(LP8860_EEPROM_UNLOCK, LP8860_EEPROM_CODE_2); - i2cWriteByte(LP8860_EEPROM_UNLOCK, LP8860_EEPROM_CODE_3); - i2cWriteBuffer(LP8860_EEPROM_REG_0, eepromInitTable, eepromTableSize); - i2cWriteByte(LP8860_EEPROM_CNTRL, LP8860_PROGRAM_EEPROM); - usleep(200000); - i2cWriteByte(LP8860_EEPROM_CNTRL, 0); - i2cWriteByte(LP8860_EEPROM_UNLOCK, LP8860_LOCK_EEPROM); - } -} - - -void LP8860::allowMaxCurrent() -{ - i2cWriteByte(LP8860_DISP_CL1_CURR_MSB, 0x0F); - i2cWriteByte(LP8860_DISP_CL1_CURR_LSB, 0xFF); - i2cWriteByte(LP8860_CL2_CURRENT, 0xFF); - i2cWriteByte(LP8860_CL3_CURRENT, 0xFF); - i2cWriteByte(LP8860_CL4_CURRENT, 0xFF); -} - - -void LP8860::i2cWriteByte(int reg, int value) -{ - i2c->address(LP8860_I2C_ADDR); - status = i2c->writeReg(static_cast<uint8_t>(reg), static_cast<uint8_t>(value)); - if (status != mraa::SUCCESS) - UPM_THROW("i2cWriteByte failed"); -} - - -uint8_t LP8860::i2cReadByte(uint8_t reg) -{ - uint8_t value; - i2c->address(LP8860_I2C_ADDR); - if (i2c->readBytesReg(reg, &value, 1) != 1) - UPM_THROW("i2cReadByte failed"); - return value; -} - - -void LP8860::i2cWriteBuffer(int reg, uint8_t* buf, int length) -{ - if (length <= MAX_I2C_WRITE_SIZE) - { - uint8_t* writeBuf = new unsigned char[length + 1]; - writeBuf[0] = reg; - memcpy(&writeBuf[1], buf, length); - i2c->address(LP8860_I2C_ADDR); - status = i2c->write(writeBuf, length + 1); - delete[] writeBuf; - } - else - status = mraa::ERROR_INVALID_PARAMETER; - if (status != mraa::SUCCESS) - UPM_THROW("i2cWriteBuffer failed"); -} - - -void LP8860::i2cReadBuffer(int reg, uint8_t* buf, int length) -{ - i2c->address(LP8860_I2C_ADDR); - if (i2c->readBytesReg(reg, buf, length) != length) - UPM_THROW("i2cReadBuffer failed"); -} - |