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Exposing the LED

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This commit is contained in:
Rodrigo Alfonso 2025-02-10 02:56:07 -03:00
parent acd414f017
commit 5aa625bf7c
3 changed files with 35 additions and 18 deletions
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10
examples/LinkIR_demo/src/main.cpp
View File

@ -30,6 +30,16 @@ int main() {
bool a = true, b = true;
// linkIR->startCount();
// for (u32 i = 0; i < 60; i++) {
// VBlankIntrWait();
// }
// u32 elapsedUs = linkIR->stopCount();
// linkIR->stopCount();
// Common::log(std::to_string(elapsedUs));
// while (true)
// ;
while (true) {
std::string output = "LinkIR_demo (v8.0.0)\n\n";

2
lib/LinkIR.cpp
View File

@ -1,6 +1,6 @@
#include "LinkIR.hpp"
// To modulate a signal to 38kHz, we need to stay 13.15µs LOW and 13.15µs HIGH.
// To modulate a signal at 38kHz, we need to stay 13.15µs LOW and 13.15µs HIGH.
// 38kHz signal => 38000/second =>
// period = 1000000µs / 38000 = 26.31µs
// halfPeriod = 13.15µs

41
lib/LinkIR.hpp
View File

@ -37,6 +37,7 @@
LINK_VERSION_TAG LINK_IR_VERSION = "vLinkIR/v8.0.0";
#define LINK_IR_SIGNAL_END 0
#define LINK_IR_NEC_TOTAL_PULSES 68
#define LINK_IR_NEC_LEADER_MARK 9000
#define LINK_IR_NEC_LEADER_SPACE 4500
#define LINK_IR_NEC_PULSE 560
@ -109,9 +110,9 @@ class LinkIR {
linkGPIO.writePin(Pin::SO, false);
linkGPIO.setSIInterrupts(true);
linkGPIO.writePin(Pin::SO, true);
turnLightOn();
waitMicroseconds(TIMEOUT_MICROSECONDS);
linkGPIO.writePin(Pin::SO, false);
turnLightOff();
linkGPIO.setSIInterrupts(false);
bool success = irq;
@ -121,7 +122,7 @@ class LinkIR {
}
void sendNEC(u8 address, u8 command) {
u16 pulses[68];
u16 pulses[LINK_IR_NEC_TOTAL_PULSES];
u32 i = 0;
pulses[i++] = LINK_IR_NEC_LEADER_MARK;
@ -133,37 +134,31 @@ class LinkIR {
pulses[i++] = LINK_IR_NEC_PULSE;
pulses[i++] = LINK_IR_SIGNAL_END;
send<true>(pulses);
send(pulses);
}
/**
* Sends a generic IR signal.
* Sends a generic IR signal, modulating at standard 38kHz.
* @param pulses An array of u16 numbers describing the signal. Even indices
* are *marks* (IR on), odd indices are *spaces* (IR off), and `0` ends the
* signal.
* @tparam modulate38kHz Whether the *marks* should be modulated to 38kHz or
* not. Most common protocols require this (for example, the NEC Protocol).
* \warning The carrier frequency is tied to the ASM code. To transmit in
* other frequencies, you'll have to bitbang the `SO` pin yourself.
*/
template <bool modulate38kHz>
void send(u16* pulses) {
linkGPIO.writePin(Pin::SO, false);
turnLightOff();
for (u32 i = 0; pulses[i] != 0; i++) {
u32 microseconds = pulses[i];
bool isMark = i % 2 == 0;
if (isMark) {
if constexpr (modulate38kHz) {
generate38kHzSignal(microseconds);
} else {
linkGPIO.writePin(Pin::SO, true);
waitMicroseconds(microseconds);
}
generate38kHzSignal(microseconds);
} else {
linkGPIO.writePin(Pin::SO, false);
turnLightOff();
waitMicroseconds(microseconds);
}
}
linkGPIO.writePin(Pin::SO, false);
}
bool receiveNEC(u8& address, u8& command) {
@ -176,6 +171,18 @@ class LinkIR {
return false;
}
/**
* Turns the IR LED on.
* \warning The adapter won't keep it on for more than 10µs. Add some pauses
* after every 10µs.
*/
void turnLightOn() { linkGPIO.writePin(Pin::SO, true); }
/**
* Turns the IR LED off.
*/
void turnLightOff() { linkGPIO.writePin(Pin::SO, false); }
/**
* @brief Deactivates the library.
*/