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APA102: Add string based constructor for LED Strip

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Signed-off-by: Adelin Dobre <adelin.dobre@rinftech.com>
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
This commit is contained in:
Adelin Dobre 2018-07-30 16:14:58 +03:00 committed by Mihai Tudor Panu
parent 2975bae075
commit cb27acbc04
2 changed files with 156 additions and 8 deletions
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141
src/apa102/apa102.cxx
View File

@ -28,10 +28,16 @@
#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)
{
@ -71,13 +77,145 @@ APA102::APA102(uint16_t ledCount, uint8_t spiBus, bool batchMode, int8_t csn)
}
}
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;
@ -88,6 +226,7 @@ APA102::~APA102()
delete m_csnPinCtx;
}
}
}
void

9
src/apa102/apa102.hpp
View File

@ -25,6 +25,7 @@
#include <mraa/gpio.hpp>
#include <mraa/spi.hpp>
#include <mraa/initio.hpp>
#include <string>
#define HIGH 1
@ -69,6 +70,13 @@ class APA102
*/
APA102(uint16_t ledCount, uint8_t spiBus, bool batchMode = false, int8_t csn = -1);
/**
* Instantiates APA102 RGB LED Strip based on a given string.
*
* @param initStr string containing specific information for APA102 RGB LED Strip initialization.
*/
APA102(std::string initStr);
/**
* APA102 destructor
*/
@ -160,6 +168,7 @@ class APA102
APA102(const APA102&) = delete;
APA102 &operator=(const APA102&) = delete;
mraa::MraaIo mraaIo;
mraa::Spi* m_spi;
mraa::Gpio* m_csnPinCtx;