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https://github.com/eclipse/upm.git
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cb27acbc04
Signed-off-by: Adelin Dobre <adelin.dobre@rinftech.com> Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
337 lines
10 KiB
C++
337 lines
10 KiB
C++
/*
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* Author: Yannick Adam <yannick.adam@gmail.com>
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* Copyright (c) 2016 Yannick Adam
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <cstring>
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#include <iostream>
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#include <stdexcept>
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#include <stdlib.h>
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#include <unistd.h>
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#include "upm_string_parser.hpp"
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#include "apa102.hpp"
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using namespace upm;
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static bool operator!(mraa::MraaIo &mraaIo)
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{
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return mraaIo.getMraaDescriptors() == NULL;
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}
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APA102::APA102(uint16_t ledCount, uint8_t spiBus, bool batchMode, int8_t csn)
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: m_ledCount(ledCount), m_batchMode(batchMode)
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{
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mraa::Result res = mraa::SUCCESS;
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m_leds = NULL;
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// Optional chip select pin
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m_csnPinCtx = NULL;
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if (csn > -1) {
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m_csnPinCtx = new mraa::Gpio(csn);
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res = m_csnPinCtx->dir(mraa::DIR_OUT);
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if (res != mraa::SUCCESS) {
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throw std::invalid_argument(std::string(__FUNCTION__) +
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": GPIO failed to set direction");
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}
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}
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CSOff();
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// Initialize SPI
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m_spi = new mraa::Spi(spiBus);
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// Initialize LED array
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uint16_t endFrameLength = (m_ledCount + 15) / 16; // End frame should be (leds/2) bits
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m_frameLength = endFrameLength + (m_ledCount + 1) * 4;
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if ((m_leds = (uint8_t*) malloc(m_frameLength))) {
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memset(m_leds, 0x00, m_frameLength - 4); // Clear state
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memset(&m_leds[m_frameLength - endFrameLength], 0xFF, endFrameLength); // Frame End
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// Need to set the brightness to "0" for each Led
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for (int i = 1; i <= m_ledCount; i++) {
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m_leds[i * 4] = 224;
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}
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} else {
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throw std::runtime_error(std::string(__FUNCTION__) +
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": Failed to allocate memory for LED Strip");
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}
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}
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APA102::APA102(std::string initStr) : mraaIo(initStr)
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{
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mraa::Result res = mraa::SUCCESS;
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m_leds = NULL;
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m_batchMode = false;
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std::vector<std::string> upmTokens;
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if(!mraaIo.getLeftoverStr().empty()) {
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upmTokens = UpmStringParser::parse(mraaIo.getLeftoverStr());
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}
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std::string::size_type sz, prev_sz;;
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for (std::string tok : upmTokens) {
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if(tok.substr(0, 9) == "ledCount:") {
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m_ledCount = (uint16_t)std::stoi(tok.substr(9), nullptr, 0);
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}
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if(tok.substr(0, 10) == "batchMode:") {
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m_batchMode = std::stoi(tok.substr(10), nullptr, 0);
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}
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}
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// Optional chip select pin
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m_csnPinCtx = NULL;
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if(!mraaIo.gpios.empty()) {
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m_csnPinCtx = &mraaIo.gpios[0];
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res = m_csnPinCtx->dir(mraa::DIR_OUT);
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if (res != mraa::SUCCESS) {
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throw std::invalid_argument(std::string(__FUNCTION__) +
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": GPIO failed to set direction");
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}
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}
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CSOff();
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// Initialize SPI
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if(!mraaIo.spis.empty()) {
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m_spi = &mraaIo.spis[0];
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} else {
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throw std::invalid_argument(std::string(__FUNCTION__) +
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": mraa_spi_init failed");
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}
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// Initialize LED array
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uint16_t endFrameLength = (m_ledCount + 15) / 16; // End frame should be (leds/2) bits
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m_frameLength = endFrameLength + (m_ledCount + 1) * 4;
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if ((m_leds = (uint8_t*) malloc(m_frameLength))) {
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memset(m_leds, 0x00, m_frameLength - 4); // Clear state
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memset(&m_leds[m_frameLength - endFrameLength], 0xFF, endFrameLength); // Frame End
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// Need to set the brightness to "0" for each Led
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for (int i = 1; i <= m_ledCount; i++) {
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m_leds[i * 4] = 224;
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}
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} else {
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throw std::runtime_error(std::string(__FUNCTION__) +
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": Failed to allocate memory for LED Strip");
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}
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for (std::string tok : upmTokens) {
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if(tok.substr(0, 7) == "setLed:") {
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uint16_t ledIdx = std::stoul(tok.substr(7), &sz, 0);
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tok = tok.substr(7);
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prev_sz = sz;
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uint8_t brightness = std::stoul(tok.substr(prev_sz + 1), &sz, 0);
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tok = tok.substr(prev_sz + 1);
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prev_sz = sz;
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uint8_t r = std::stoul(tok.substr(prev_sz + 1), &sz, 0);
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tok = tok.substr(prev_sz + 1);
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prev_sz = sz;
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uint8_t g = std::stoul(tok.substr(prev_sz + 1), &sz, 0);
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tok = tok.substr(prev_sz + 1);
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prev_sz = sz;
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uint8_t b = std::stoul(tok.substr(prev_sz + 1), &sz, 0);
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setLed(ledIdx, brightness, r, g, b);
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}
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if(tok.substr(0, 17) == "setLedBrightness:") {
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uint16_t ledIdx = std::stoul(tok.substr(17), &sz, 0);
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tok = tok.substr(17);
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uint8_t brightness = std::stoul(tok.substr(sz + 1), nullptr, 0);
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setLedBrightness(ledIdx, brightness);
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}
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if(tok.substr(0, 11) == "setAllLeds:") {
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uint16_t brightness = std::stoul(tok.substr(11), &sz, 0);
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tok = tok.substr(11);
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prev_sz = sz;
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uint8_t r = std::stoul(tok.substr(prev_sz + 1), &sz, 0);
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tok = tok.substr(prev_sz + 1);
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prev_sz = sz;
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uint8_t g = std::stoul(tok.substr(prev_sz + 1), &sz, 0);
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tok = tok.substr(prev_sz + 1);
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prev_sz = sz;
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uint8_t b = std::stoul(tok.substr(prev_sz + 1), &sz, 0);
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setAllLeds(brightness, r, g, b);
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}
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if(tok.substr(0, 8) == "setLeds:") {
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uint16_t startIdx = std::stoul(tok.substr(8), &sz, 0);
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tok = tok.substr(8);
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prev_sz = sz;
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uint16_t endIdx = std::stoul(tok.substr(prev_sz + 1), &sz, 0);
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tok = tok.substr(prev_sz + 1);
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prev_sz = sz;
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uint8_t brightness = std::stoul(tok.substr(prev_sz + 1), &sz, 0);
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tok = tok.substr(prev_sz + 1);
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prev_sz = sz;
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uint8_t r = std::stoul(tok.substr(prev_sz + 1), &sz, 0);
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tok = tok.substr(prev_sz + 1);
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prev_sz = sz;
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uint8_t g = std::stoul(tok.substr(prev_sz + 1), &sz, 0);
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tok = tok.substr(prev_sz + 1);
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prev_sz = sz;
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uint8_t b = std::stoul(tok.substr(prev_sz + 1), &sz, 0);
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setLeds(startIdx, endIdx, brightness, r, g, b);
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}
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if(tok.substr(0, 18) == "setLedsBrightness:") {
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uint16_t startIdx = std::stoul(tok.substr(18), &sz, 0);
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tok = tok.substr(18);
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prev_sz = sz;
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uint16_t endIdx = std::stoul(tok.substr(prev_sz + 1), &sz, 0);
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tok = tok.substr(prev_sz + 1);
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prev_sz = sz;
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uint8_t brightness = std::stoul(tok.substr(prev_sz + 1), &sz, 0);
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setLedsBrightness(startIdx, endIdx, brightness);
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}
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if(tok.substr(0, 12) == "setBusSpeed:") {
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int hz = std::stoi(tok.substr(12), nullptr, 0);
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setBusSpeed(hz);
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}
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}
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}
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APA102::~APA102()
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{
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// Clear leds
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if (m_leds) {
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free(m_leds);
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}
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if(!mraaIo) {
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// Clear SPI
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if (m_spi) {
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delete m_spi;
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}
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// Clear GPIO
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if (m_csnPinCtx) {
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delete m_csnPinCtx;
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}
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}
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}
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void
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APA102::setLed(uint16_t ledIdx, uint8_t brightness, uint8_t r, uint8_t g, uint8_t b)
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{
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setLeds(ledIdx, ledIdx, brightness, r, g, b);
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}
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void
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APA102::setLedBrightness(uint16_t ledIdx, uint8_t brightness)
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{
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setLedsBrightness(ledIdx, ledIdx, brightness);
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}
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void
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APA102::setAllLeds(uint8_t brightness, uint8_t r, uint8_t g, uint8_t b)
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{
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setLeds(0, m_ledCount - 1, brightness, r, g, b);
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}
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void
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APA102::setLeds(uint16_t startIdx, uint16_t endIdx, uint8_t brightness, uint8_t r, uint8_t g, uint8_t b)
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{
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uint16_t s_idx = (startIdx + 1) * 4;
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uint16_t e_idx = (endIdx + 1) * 4;
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for (uint16_t i = s_idx; i <= e_idx; i += 4) {
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m_leds[i] = brightness | 224;
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m_leds[i + 1] = b;
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m_leds[i + 2] = g;
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m_leds[i + 3] = r;
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}
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if (!m_batchMode) {
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pushState();
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}
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}
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void
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APA102::setLedsBrightness(uint16_t startIdx, uint16_t endIdx, uint8_t brightness)
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{
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uint16_t s_idx = (startIdx + 1) * 4;
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uint16_t e_idx = (endIdx + 1) * 4;
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for (uint16_t i = s_idx; i <= e_idx; i += 4) {
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m_leds[i] = brightness | 224;
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}
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if (!m_batchMode) {
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pushState();
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}
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}
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void
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APA102::setLeds(uint16_t startIdx, uint16_t endIdx, uint8_t* colors)
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{
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uint16_t s_idx = (startIdx + 1) * 4;
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memcpy(&m_leds[s_idx], colors, (endIdx - startIdx + 1) * 4);
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if (!m_batchMode) {
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pushState();
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}
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}
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void
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APA102::setBusSpeed(int hz)
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{
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if (m_spi->frequency(hz) != mraa::SUCCESS) {
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throw std::runtime_error(std::string(__FUNCTION__) +
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": Failed to change SPI bus speed");
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}
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}
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void
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APA102::pushState(void)
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{
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CSOn();
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uint8_t* recv = m_spi->write(m_leds, m_frameLength);
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if (recv != NULL) free(recv);
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CSOff();
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}
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/*
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* **************
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* private area
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* **************
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*/
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mraa::Result
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APA102::CSOn()
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{
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if (m_csnPinCtx) {
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return m_csnPinCtx->write(HIGH);
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}
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return mraa::ERROR_FEATURE_NOT_SUPPORTED;
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}
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mraa::Result
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APA102::CSOff()
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{
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if (m_csnPinCtx) {
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return m_csnPinCtx->write(LOW);
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}
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return mraa::ERROR_FEATURE_NOT_SUPPORTED;
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}
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