upm/src/apa102/apa102.cxx
Adelin Dobre cb27acbc04 APA102: Add string based constructor for LED Strip
Signed-off-by: Adelin Dobre <adelin.dobre@rinftech.com>
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
2019-04-04 22:21:23 -07:00

337 lines
10 KiB
C++

/*
* Author: Yannick Adam <yannick.adam@gmail.com>
* Copyright (c) 2016 Yannick Adam
*
* 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 <cstring>
#include <iostream>
#include <stdexcept>
#include <stdlib.h>
#include <unistd.h>
#include "upm_string_parser.hpp"
#include "apa102.hpp"
using namespace upm;
static bool operator!(mraa::MraaIo &mraaIo)
{
return mraaIo.getMraaDescriptors() == NULL;
}
APA102::APA102(uint16_t ledCount, uint8_t spiBus, bool batchMode, int8_t csn)
: m_ledCount(ledCount), m_batchMode(batchMode)
{
mraa::Result res = mraa::SUCCESS;
m_leds = NULL;
// Optional chip select pin
m_csnPinCtx = NULL;
if (csn > -1) {
m_csnPinCtx = new mraa::Gpio(csn);
res = m_csnPinCtx->dir(mraa::DIR_OUT);
if (res != mraa::SUCCESS) {
throw std::invalid_argument(std::string(__FUNCTION__) +
": GPIO failed to set direction");
}
}
CSOff();
// Initialize SPI
m_spi = new mraa::Spi(spiBus);
// Initialize LED array
uint16_t endFrameLength = (m_ledCount + 15) / 16; // End frame should be (leds/2) bits
m_frameLength = endFrameLength + (m_ledCount + 1) * 4;
if ((m_leds = (uint8_t*) malloc(m_frameLength))) {
memset(m_leds, 0x00, m_frameLength - 4); // Clear state
memset(&m_leds[m_frameLength - endFrameLength], 0xFF, endFrameLength); // Frame End
// Need to set the brightness to "0" for each Led
for (int i = 1; i <= m_ledCount; i++) {
m_leds[i * 4] = 224;
}
} else {
throw std::runtime_error(std::string(__FUNCTION__) +
": Failed to allocate memory for LED Strip");
}
}
APA102::APA102(std::string initStr) : mraaIo(initStr)
{
mraa::Result res = mraa::SUCCESS;
m_leds = NULL;
m_batchMode = false;
std::vector<std::string> upmTokens;
if(!mraaIo.getLeftoverStr().empty()) {
upmTokens = UpmStringParser::parse(mraaIo.getLeftoverStr());
}
std::string::size_type sz, prev_sz;;
for (std::string tok : upmTokens) {
if(tok.substr(0, 9) == "ledCount:") {
m_ledCount = (uint16_t)std::stoi(tok.substr(9), nullptr, 0);
}
if(tok.substr(0, 10) == "batchMode:") {
m_batchMode = std::stoi(tok.substr(10), nullptr, 0);
}
}
// Optional chip select pin
m_csnPinCtx = NULL;
if(!mraaIo.gpios.empty()) {
m_csnPinCtx = &mraaIo.gpios[0];
res = m_csnPinCtx->dir(mraa::DIR_OUT);
if (res != mraa::SUCCESS) {
throw std::invalid_argument(std::string(__FUNCTION__) +
": GPIO failed to set direction");
}
}
CSOff();
// Initialize SPI
if(!mraaIo.spis.empty()) {
m_spi = &mraaIo.spis[0];
} else {
throw std::invalid_argument(std::string(__FUNCTION__) +
": mraa_spi_init failed");
}
// Initialize LED array
uint16_t endFrameLength = (m_ledCount + 15) / 16; // End frame should be (leds/2) bits
m_frameLength = endFrameLength + (m_ledCount + 1) * 4;
if ((m_leds = (uint8_t*) malloc(m_frameLength))) {
memset(m_leds, 0x00, m_frameLength - 4); // Clear state
memset(&m_leds[m_frameLength - endFrameLength], 0xFF, endFrameLength); // Frame End
// Need to set the brightness to "0" for each Led
for (int i = 1; i <= m_ledCount; i++) {
m_leds[i * 4] = 224;
}
} else {
throw std::runtime_error(std::string(__FUNCTION__) +
": Failed to allocate memory for LED Strip");
}
for (std::string tok : upmTokens) {
if(tok.substr(0, 7) == "setLed:") {
uint16_t ledIdx = std::stoul(tok.substr(7), &sz, 0);
tok = tok.substr(7);
prev_sz = sz;
uint8_t brightness = std::stoul(tok.substr(prev_sz + 1), &sz, 0);
tok = tok.substr(prev_sz + 1);
prev_sz = sz;
uint8_t r = std::stoul(tok.substr(prev_sz + 1), &sz, 0);
tok = tok.substr(prev_sz + 1);
prev_sz = sz;
uint8_t g = std::stoul(tok.substr(prev_sz + 1), &sz, 0);
tok = tok.substr(prev_sz + 1);
prev_sz = sz;
uint8_t b = std::stoul(tok.substr(prev_sz + 1), &sz, 0);
setLed(ledIdx, brightness, r, g, b);
}
if(tok.substr(0, 17) == "setLedBrightness:") {
uint16_t ledIdx = std::stoul(tok.substr(17), &sz, 0);
tok = tok.substr(17);
uint8_t brightness = std::stoul(tok.substr(sz + 1), nullptr, 0);
setLedBrightness(ledIdx, brightness);
}
if(tok.substr(0, 11) == "setAllLeds:") {
uint16_t brightness = std::stoul(tok.substr(11), &sz, 0);
tok = tok.substr(11);
prev_sz = sz;
uint8_t r = std::stoul(tok.substr(prev_sz + 1), &sz, 0);
tok = tok.substr(prev_sz + 1);
prev_sz = sz;
uint8_t g = std::stoul(tok.substr(prev_sz + 1), &sz, 0);
tok = tok.substr(prev_sz + 1);
prev_sz = sz;
uint8_t b = std::stoul(tok.substr(prev_sz + 1), &sz, 0);
setAllLeds(brightness, r, g, b);
}
if(tok.substr(0, 8) == "setLeds:") {
uint16_t startIdx = std::stoul(tok.substr(8), &sz, 0);
tok = tok.substr(8);
prev_sz = sz;
uint16_t endIdx = std::stoul(tok.substr(prev_sz + 1), &sz, 0);
tok = tok.substr(prev_sz + 1);
prev_sz = sz;
uint8_t brightness = std::stoul(tok.substr(prev_sz + 1), &sz, 0);
tok = tok.substr(prev_sz + 1);
prev_sz = sz;
uint8_t r = std::stoul(tok.substr(prev_sz + 1), &sz, 0);
tok = tok.substr(prev_sz + 1);
prev_sz = sz;
uint8_t g = std::stoul(tok.substr(prev_sz + 1), &sz, 0);
tok = tok.substr(prev_sz + 1);
prev_sz = sz;
uint8_t b = std::stoul(tok.substr(prev_sz + 1), &sz, 0);
setLeds(startIdx, endIdx, brightness, r, g, b);
}
if(tok.substr(0, 18) == "setLedsBrightness:") {
uint16_t startIdx = std::stoul(tok.substr(18), &sz, 0);
tok = tok.substr(18);
prev_sz = sz;
uint16_t endIdx = std::stoul(tok.substr(prev_sz + 1), &sz, 0);
tok = tok.substr(prev_sz + 1);
prev_sz = sz;
uint8_t brightness = std::stoul(tok.substr(prev_sz + 1), &sz, 0);
setLedsBrightness(startIdx, endIdx, brightness);
}
if(tok.substr(0, 12) == "setBusSpeed:") {
int hz = std::stoi(tok.substr(12), nullptr, 0);
setBusSpeed(hz);
}
}
}
APA102::~APA102()
{
// Clear leds
if (m_leds) {
free(m_leds);
}
if(!mraaIo) {
// Clear SPI
if (m_spi) {
delete m_spi;
}
// Clear GPIO
if (m_csnPinCtx) {
delete m_csnPinCtx;
}
}
}
void
APA102::setLed(uint16_t ledIdx, uint8_t brightness, uint8_t r, uint8_t g, uint8_t b)
{
setLeds(ledIdx, ledIdx, brightness, r, g, b);
}
void
APA102::setLedBrightness(uint16_t ledIdx, uint8_t brightness)
{
setLedsBrightness(ledIdx, ledIdx, brightness);
}
void
APA102::setAllLeds(uint8_t brightness, uint8_t r, uint8_t g, uint8_t b)
{
setLeds(0, m_ledCount - 1, brightness, r, g, b);
}
void
APA102::setLeds(uint16_t startIdx, uint16_t endIdx, uint8_t brightness, uint8_t r, uint8_t g, uint8_t b)
{
uint16_t s_idx = (startIdx + 1) * 4;
uint16_t e_idx = (endIdx + 1) * 4;
for (uint16_t i = s_idx; i <= e_idx; i += 4) {
m_leds[i] = brightness | 224;
m_leds[i + 1] = b;
m_leds[i + 2] = g;
m_leds[i + 3] = r;
}
if (!m_batchMode) {
pushState();
}
}
void
APA102::setLedsBrightness(uint16_t startIdx, uint16_t endIdx, uint8_t brightness)
{
uint16_t s_idx = (startIdx + 1) * 4;
uint16_t e_idx = (endIdx + 1) * 4;
for (uint16_t i = s_idx; i <= e_idx; i += 4) {
m_leds[i] = brightness | 224;
}
if (!m_batchMode) {
pushState();
}
}
void
APA102::setLeds(uint16_t startIdx, uint16_t endIdx, uint8_t* colors)
{
uint16_t s_idx = (startIdx + 1) * 4;
memcpy(&m_leds[s_idx], colors, (endIdx - startIdx + 1) * 4);
if (!m_batchMode) {
pushState();
}
}
void
APA102::setBusSpeed(int hz)
{
if (m_spi->frequency(hz) != mraa::SUCCESS) {
throw std::runtime_error(std::string(__FUNCTION__) +
": Failed to change SPI bus speed");
}
}
void
APA102::pushState(void)
{
CSOn();
uint8_t* recv = m_spi->write(m_leds, m_frameLength);
if (recv != NULL) free(recv);
CSOff();
}
/*
* **************
* private area
* **************
*/
mraa::Result
APA102::CSOn()
{
if (m_csnPinCtx) {
return m_csnPinCtx->write(HIGH);
}
return mraa::ERROR_FEATURE_NOT_SUPPORTED;
}
mraa::Result
APA102::CSOff()
{
if (m_csnPinCtx) {
return m_csnPinCtx->write(LOW);
}
return mraa::ERROR_FEATURE_NOT_SUPPORTED;
}