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WLED_MM_Infinity/wled00/pin_manager.cpp
Frank a320068bbe I2C: allow any GPIO on 8266 (experimental) 
as it turns out, also on 8266 any pin can be assigned to I2C. Only SPI pins are fixed, and GPIO16 should not be used as it does not support interrupts.
2023-01-15 22:13:46 +01:00

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#include "pin_manager.h"
#include "wled.h"
#ifdef ARDUINO_ARCH_ESP32
#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(4, 2, 0)
#include <soc/soc_caps.h> // WLEDMM
#endif
#endif
#ifdef WLED_DEBUG
static void DebugPrintOwnerTag(PinOwner tag)
{
uint32_t q = static_cast<uint8_t>(tag);
if (q) {
DEBUG_PRINT(pinManager.getOwnerText(tag)); DEBUG_PRINT(F(" = ")); // WLEDMM
DEBUG_PRINTF("0x%02x (%d)", q, q);
} else {
DEBUG_PRINT(F("(no owner)"));
}
}
#endif
// WLEDMM begin
String PinManagerClass::getPinOwnerText(int gpio) {
if ((gpio < 0) || (gpio == 0xFF)) return(F(""));
//if (gpio >= GPIO_PIN_COUNT) return(F("n/a"));
if (!isPinOk(gpio, false)) return(F("n/a"));
if (!isPinAllocated(gpio)) return(F("./."));
return(getOwnerText(getPinOwner(gpio)));
}
String PinManagerClass::getOwnerText(PinOwner tag) {
switch(tag) {
case PinOwner::None : return(F("no owner")); break; // unknown - no owner
case PinOwner::DebugOut : return(F("debug output")); break; // 'Dbg' == debug output always IO1
case PinOwner::Ethernet : return(F("Ethernet")); break; // Ethernet
case PinOwner::BusDigital : return(F("LEDs (digital)")); break; // Digital LEDs
case PinOwner::BusPwm : return(F("LEDs (PWM)")); break; // PWM output using BusPwm
case PinOwner::BusOnOff : return(F("LEDs (on-off)")); break; //
case PinOwner::Button : return(F("Button")); break; // 'Butn' == button from configuration
case PinOwner::IR : return(F("IR Receiver")); break; // 'IR' == IR receiver pin from configuration
case PinOwner::Relay : return(F("Relay")); break; // 'Rly' == Relay pin from configuration
case PinOwner::SPI_RAM : return(F("PSRAM")); break; // 'SpiR' == SPI RAM (aka PSRAM)
case PinOwner::DMX : return(F("DMX out")); break; // 'DMX' == hard-coded to IO2
case PinOwner::HW_I2C : return(F("I2C (hw)")); break; // 'I2C' == hardware I2C pins (4&5 on ESP8266, 21&22 on ESP32)
case PinOwner::HW_SPI : return(F("SPI (hw)")); break; // 'SPI' == hardware (V)SPI pins (13,14&15 on ESP8266, 5,18&23 on ESP32)
case PinOwner::UM_Audioreactive : return(F("AudioReactive (UM)")); break; // audioreative usermod - analog or digital audio input
case PinOwner::UM_Temperature : return(F("Temperature (UM)")); break; // "usermod_temperature.h"
case PinOwner::UM_PIR : return(F("PIR (UM)")); break; // "usermod_PIR_sensor_switch.h"
case PinOwner::UM_FourLineDisplay : return(F("4Line Display (UM)")); break; // "usermod_v2_four_line_display.h -- May use "standard" HW_I2C pins
case PinOwner::UM_RotaryEncoderUI : return(F("Rotary Enc. (UM)")); break; // "usermod_v2_rotary_encoder_ui.h"
case PinOwner::UM_MultiRelay : return(F("Multi Relay (UM)")); break; // "usermod_multi_relay.h"
case PinOwner::UM_AnimatedStaircase : return(F("Anim.Staircase (UM)")); break; // "Animated_Staircase.h"
case PinOwner::UM_RGBRotaryEncoder : return(F("RGB Rotary Enc. (UM)")); break; // "rgb-rotary-encoder.h"
case PinOwner::UM_QuinLEDAnPenta : return(F("QuinLEDAnPenta (UM)")); break; // "quinled-an-penta.h"
case PinOwner::UM_BME280 : return(F("BME280 (UM)")); break; // "usermod_bme280.h" -- Uses "standard" HW_I2C pins
case PinOwner::UM_BH1750 : return(F("BH1750 (UM)")); break; // "usermod_bh1750.h" -- Uses "standard" HW_I2C pins
case PinOwner::UM_SdCard : return(F("SD-Card (UM)")); break; // "usermod_sd_card.h" -- Uses SPI pins
case PinOwner::UM_PWM_OUTPUTS : return(F("PWM Output (UM)")); break; // "usermod_pwm_outputs.h"
case PinOwner::UM_Battery : return(F("Battery (UM)")); break; // "usermod_battery.h"
case PinOwner::UM_Example : return(F("example (UM)")); break; // unspecified usermod
case PinOwner::UM_Unspecified : return(F("usermod (UM)")); break; // unspecified usermod
}
return(F("other")); // should not happen
}
String PinManagerClass::getPinSpecialText(int gpio) { // special purpose PIN info
if ((gpio == 0xFF) || (gpio < 0)) return(F("")); // explicitly allow -1 as a no-op
#ifdef USERMOD_AUDIOREACTIVE
// audioreactive settings - unfortunately, these are hiddden inside usermod now :-(
// if((gpio == audioPin) && (dmType == 0)) return(F("analog audio in"));
// if((gpio == i2ssdPin) && (dmType > 0)) return(F("I2S SD"));
// if((gpio == i2swsPin) && (dmType > 0)) return(F("I2S WS"));
// if((gpio == i2sckPin) && (dmType > 0) && (dmType != 5)) return(F("I2S SCK"));
// if((gpio == mclkPin) && ((dmType == 2) || (dmType == 4))) return(F("I2S MCLK"));
#ifdef I2S_SDPIN
if (gpio == I2S_SDPIN) return(F("(default) I2S SD"));
#endif
#ifdef I2S_WSPIN
if (gpio == I2S_WSPIN) return(F("(default) I2S WS"));
#endif
#ifdef I2S_CKPIN
if (gpio == I2S_CKPIN) return(F("(default) I2S SCK"));
#endif
#ifdef MCLK_PIN
if (gpio == MCLK_PIN) return(F("(default) I2S MCLK"));
#endif
#endif
// hardware special purpose PINS. part1 - assigned pins
if (gpio == hardwareTX) return(F("Serial TX")); // Serial (debug monitor) TX pin (usually GPIO1)
if (gpio == hardwareRX) return(F("Serial RX")); // Serial (debug monitor) RX pin (usually GPIO3)
if (isPinAllocated(gpio)) {
if ((gpio == i2c_sda) && (getPinOwner(gpio) == PinOwner::HW_I2C)) return(F("I2C SDA"));
if ((gpio == i2c_scl) && (getPinOwner(gpio) == PinOwner::HW_I2C)) return(F("I2C SCL"));
if ((gpio == spi_sclk) && (getPinOwner(gpio) == PinOwner::HW_SPI)) return(F("SPI SLK / SCK"));
if ((gpio == spi_mosi) && (getPinOwner(gpio) == PinOwner::HW_SPI)) return(F("SPI PICO / MOSI"));
if ((gpio == spi_miso) && (getPinOwner(gpio) == PinOwner::HW_SPI)) return(F("SPI POCI / MISO"));
}
// MCU special PINS
#ifdef ARDUINO_ARCH_ESP32
#if defined(CONFIG_IDF_TARGET_ESP32S3)
// ESP32-S3
if (gpio > 18 && gpio < 21) return (F("USB (CDC) / JTAG"));
#if !defined(BOARD_HAS_PSRAM)
if (gpio > 32 && gpio < 38) return (F("(optional) Octal Flash or PSRAM"));
#else
if (gpio > 32 && gpio < 38) return (F("(reserved) Octal PSRAM or Octal Flash"));
#endif
//if (gpio == 0 || gpio == 3 || gpio == 45 || gpio == 46) return (F("(strapping pin)"));
#elif defined(CONFIG_IDF_TARGET_ESP32S2)
// ESP32-S2
//if (gpio > 38 && gpio < 43) return (F("USB (CDC) / JTAG")); // note to self: this seems to be wrong. need to fix later.
if (gpio == 46) return (F("pulled-down, input only"));
//if (gpio == 0 || gpio == 45 || gpio == 46) return (F("(strapping pin)"));
#elif defined(CONFIG_IDF_TARGET_ESP32C3)
// ESP32-C3
if (gpio > 17 && gpio < 20) return (F("USB (CDC) / JTAG"));
//if (gpio == 2 || gpio == 8 || gpio == 9) return (F("(strapping pin)"));
#else
// "classic" ESP32, or ESP32 PICO-D4
//if (gpio == 0 || gpio == 2 || gpio == 5) return (F("(strapping pin)"));
//if (gpio == 12) return (F("(strapping pin - MTDI)"));
//if (gpio == 15) return (F("(strapping pin - MTDO)"));
//if (gpio > 11 && gpio < 16) return (F("(optional) JTAG debug probe"));
#if defined(BOARD_HAS_PSRAM)
if (gpio == 16 || gpio == 17) return (F("(reserved) PSRAM"));
#endif
#if defined(ARDUINO_TTGO_T7_V14_Mini32) || defined(ARDUINO_LOLIN_D32_PRO) || defined(ARDUINO_ADAFRUIT_FEATHER_ESP32_V2)
if (gpio == 35) return (F("(reserved) _VBAT voltage monitoring")); // WLEDMM experimental
#endif
#if (defined(ARDUINO_TTGO_T7_V14_Mini32) || defined(ARDUINO_TTGO_T7_V15_Mini32)) && defined(BOARD_HAS_PSRAM)
if (gpio == 25) return (F("cross-connected to pin 16")); // WLEDMM experimental
if (gpio == 27) return (F("Cross-connected to pin 17")); // WLEDMM experimental
#endif
#endif
#else
// ESP 8266
if ((gpio == 0) || (gpio == 17)) return (F("analog-in (A0)")); // 17 seems to be an alias for "A0" on 8266
#endif
#if defined(STATUSLED)
if (gpio == STATUSLED) return(F("WLED Status LED"));
#endif
// hardware special purpose PINS. part2 - default pins
if (gpio == i2c_sda) return(F("(default) I2C SDA"));
if (gpio == i2c_scl) return(F("(default) I2C SCL"));
if (gpio == spi_sclk) return(F("(default) SPI SLK / SCK"));
if (gpio == spi_mosi) return(F("(default) SPI PICO / MOSI"));
if (gpio == spi_miso) return(F("(default) SPI POCI / MISO"));
//if ((gpio == spi_cs) || ((gpio == HW_PIN_CS) && (spi_cs < 0))) return(F("(default) SPI CS / SS"));
#if defined(WLED_USE_SD_MMC) || defined(WLED_USE_SD_SPI) || defined(SD_ADAPTER)
if ((gpio == HW_PIN_CSSPI)) return(F("(default) SPI CS / SS")); // no part of usermod default settings, currently only needed by SD_CARD usermod
#endif
// Arduino and WLED special PINS
#if !defined(ARDUINO_ARCH_ESP32) // these only make sense on 8266
#if defined(LED_BUILTIN) || defined(BUILTIN_LED)
if (gpio == LED_BUILTIN) return(F("(onboard LED)"));
#endif
#endif
#ifdef LEDPIN
if (gpio == LEDPIN) return(F("(default) LED pin"));
#endif
#if defined(BTNPIN)
if (gpio == BTNPIN) return(F("(default) Button pin"));
#endif
#if defined(RLYPIN)
if (gpio == RLYPIN) return(F("(default) Relay pin"));
#endif
#if !defined(WLED_DISABLE_INFRARED) && defined(IRPIN)
if (gpio == IRPIN) return(F("(default) IR receiver pin"));
#endif
#ifdef WLED_ENABLE_DMX
if (gpio == 2) return(F("hardcoded DMX output pin"));
#endif
//
// usermod PINS
//
#ifdef USERMOD_ROTARY_ENCODER_UI
#ifdef ENCODER_DT_PIN
if (gpio == ENCODER_DT_PIN) return(F("(default) Rotary DT pin"));
#else
if (gpio == 18) return(F("(default) Rotary DT pin"));
#endif
#ifdef ENCODER_CLK_PIN
if (gpio == ENCODER_CLK_PIN) return(F("(default) Rotary CLK pin"));
#else
if (gpio == 5) return(F("(default) Rotary CLK pin"));
#endif
#ifdef ENCODER_SW_PIN
if (gpio == ENCODER_SW_PIN) return(F("(default) Rotary SW pin"));
#else
if (gpio == 19) return(F("(default) Rotary SW pin"));
#endif
#endif
#if defined(USERMOD_FOUR_LINE_DISPLAY)
#if defined(FLD_PIN_SDA) && defined(FLD_PIN_SDA)
if (gpio == FLD_PIN_SDA) return(F("(default) 4lines disp. I2C SDA"));
if (gpio == FLD_PIN_SCL) return(F("(default) 4lines disp. I2C SCL"));
#endif
#if defined(FLD_PIN_CLOCKSPI) && defined(FLD_PIN_MOSISPI) //WLEDMM renamed from HW_PIN_DATASPI
if (gpio == FLD_PIN_CLOCKSPI) return(F("(default) 4lines disp. SPI SCLK"));
if (gpio == FLD_PIN_MOSISPI) return(F("(default) 4lines disp. SPI DATA"));
#endif
#if defined(FLD_PIN_CS)
if (gpio == FLD_PIN_CS) return(F("(default) 4lines disp. SPI CS"));
#endif
#if defined(FLD_PIN_DC) && defined(FLD_PIN_RESET)
if (gpio == FLD_PIN_DC) return(F("(default) 4lines disp. DC"));
if (gpio == FLD_PIN_RESET) return(F("(default) 4lines disp. RESET"));
#endif
#endif
#ifdef USERMOD_DALLASTEMPERATURE
#ifdef USERMOD_DHT_PIN
if (gpio == USERMOD_DHT_PIN) return(F("(default) DHT temperature pin"));
#else
#ifdef ARDUINO_ARCH_ESP32
if (gpio == 21) return(F("(default) DHT temperature pin"));
#else
if (gpio == 4) return(F("(default) DHT temperature pin"));
#endif
#endif
#endif
#if defined(USERMOD_MPU6050_IMU)
#ifdef MPU6050_INT_GPIO
if (gpio == MPU6050_INT_GPIO) return(F("(default) mpu6050 INT pin"));
#else
if (gpio == 15) return(F("(default) mpu6050 INT pin"));
#endif
#endif
// Not-OK PINS
if (!isPinOk(gpio, false)) return(F(""));
#if 0
// analog pin infos - experimental !
#ifdef ARDUINO_ARCH_ESP32
// ADC PINs - not for 8266
if (digitalPinToAnalogChannel(gpio) >= 0) { // ADC pin
#ifdef SOC_ADC_CHANNEL_NUM
if (digitalPinToAnalogChannel(gpio) < SOC_ADC_CHANNEL_NUM(0)) return(F("ADC-1")); // for ESP32-S3, ESP32-S2, ESP32-C3
#else
if (digitalPinToAnalogChannel(gpio) < 8) return(F("ADC-1")); // for classic ESP32
#endif
else return(F("ADC-2"));
}
#endif
#endif
return(F("")); // default - nothing special to say
}
String PinManagerClass::getPinConflicts(int gpio) {
if ((gpio == 0xFF) || (gpio < 0)) return(F("")); // explicitly allow -1 as a no-op
if (!isPinOk(gpio, false)) return(F("")); // invalid GPIO
if (ownerConflict[gpio] == PinOwner::None) {
return(F("")); // no conflict fot this GPIO
} else { // found previous conflic!
return String("!! Conflict with ") + getOwnerText(ownerConflict[gpio]) + String(" !!");
}
}
// WLEDMM end
/// Actual allocation/deallocation routines
bool PinManagerClass::deallocatePin(byte gpio, PinOwner tag)
{
if (gpio == 0xFF) return true; // explicitly allow clients to free -1 as a no-op
if (!isPinOk(gpio, false)) return false; // but return false for any other invalid pin
// if a non-zero ownerTag, only allow de-allocation if the owner's tag is provided
if ((ownerTag[gpio] != PinOwner::None) && (ownerTag[gpio] != tag)) {
#ifdef WLED_DEBUG
DEBUG_PRINT(F("PIN DEALLOC: IO "));
DEBUG_PRINT(gpio);
DEBUG_PRINT(F(" allocated by "));
DebugPrintOwnerTag(ownerTag[gpio]);
DEBUG_PRINT(F(", but attempted de-allocation by "));
DebugPrintOwnerTag(tag);
#endif
return false;
}
byte by = gpio >> 3;
byte bi = gpio - 8*by;
bitWrite(pinAlloc[by], bi, false);
ownerTag[gpio] = PinOwner::None;
// ownerConflict[gpio] = PinOwner::None; // WLEDMM clear conflict (if any)
return true;
}
// support function for deallocating multiple pins
bool PinManagerClass::deallocateMultiplePins(const uint8_t *pinArray, byte arrayElementCount, PinOwner tag)
{
bool shouldFail = false;
DEBUG_PRINTLN(F("MULTIPIN DEALLOC"));
// first verify the pins are OK and allocated by selected owner
for (int i = 0; i < arrayElementCount; i++) {
byte gpio = pinArray[i];
if (gpio == 0xFF) {
// explicit support for io -1 as a no-op (no allocation of pin),
// as this can greatly simplify configuration arrays
continue;
}
if (isPinAllocated(gpio, tag)) {
// if the current pin is allocated by selected owner it is possible to release it
continue;
}
#ifdef WLED_DEBUG
DEBUG_PRINT(F("PIN DEALLOC: IO "));
DEBUG_PRINT(gpio);
DEBUG_PRINT(F(" allocated by "));
DebugPrintOwnerTag(ownerTag[gpio]);
DEBUG_PRINT(F(", but attempted de-allocation by "));
DebugPrintOwnerTag(tag);
#endif
shouldFail = true;
}
if (shouldFail) {
return false; // no pins deallocated
}
if (tag==PinOwner::HW_I2C) {
if (i2cAllocCount && --i2cAllocCount>0) {
// no deallocation done until last owner releases pins
return true;
}
}
if (tag==PinOwner::HW_SPI) {
if (spiAllocCount && --spiAllocCount>0) {
// no deallocation done until last owner releases pins
return true;
}
}
for (int i = 0; i < arrayElementCount; i++) {
deallocatePin(pinArray[i], tag);
}
return true;
}
bool PinManagerClass::deallocateMultiplePins(const managed_pin_type * mptArray, byte arrayElementCount, PinOwner tag)
{
uint8_t pins[arrayElementCount];
for (int i=0; i<arrayElementCount; i++) pins[i] = mptArray[i].pin;
return deallocateMultiplePins(pins, arrayElementCount, tag);
}
bool PinManagerClass::allocateMultiplePins(const managed_pin_type * mptArray, byte arrayElementCount, PinOwner tag)
{
bool shouldFail = false;
// first verify the pins are OK and not already allocated
for (int i = 0; i < arrayElementCount; i++) {
byte gpio = mptArray[i].pin;
if (gpio == 0xFF) {
// explicit support for io -1 as a no-op (no allocation of pin),
// as this can greatly simplify configuration arrays
//if (tag==PinOwner::HW_I2C) USER_PRINTF("I2C alloc attempted for %d\n", gpio);
continue;
}
if (!isPinOk(gpio, mptArray[i].isOutput)) {
#ifdef WLED_DEBUG
DEBUG_PRINT(F("PIN ALLOC: Invalid pin attempted to be allocated: GPIO "));
DEBUG_PRINT(gpio);
DEBUG_PRINT(" as "); DEBUG_PRINT(mptArray[i].isOutput ? "output": "input");
DEBUG_PRINTLN(F(""));
#else // WLEDMM
USER_PRINTF("PIN ALLOC: invalid pin - cannot use GPIO%d for %s.\n", gpio, mptArray[i].isOutput ? "output": "input");
#endif
if ((gpio < WLED_NUM_PINS) && (gpio >= 0) && (tag != PinOwner::None)) {
ownerConflict[gpio] = tag; // WLEDMM record conflict
}
shouldFail = true;
}
if ((tag==PinOwner::HW_I2C || tag==PinOwner::HW_SPI) && isPinAllocated(gpio, tag)) {
// allow multiple "allocations" of HW I2C & SPI bus pins
continue;
} else if (isPinAllocated(gpio)) {
ownerConflict[gpio] = tag; // WLEDMM record conflict
#ifdef WLED_DEBUG
DEBUG_PRINT(F("PIN ALLOC: FAIL: IO "));
DEBUG_PRINT(gpio);
DEBUG_PRINT(F(" already allocated by "));
DebugPrintOwnerTag(ownerTag[gpio]);
DEBUG_PRINTLN(F(""));
#else // WLEDMM
USER_PRINTF("PIN ALLOC: failed to assign GPIO%d to %s - already in use for %s.\n", gpio, getOwnerText(tag).c_str(), getPinOwnerText(gpio).c_str());
#endif
shouldFail = true;
}
}
if (shouldFail) {
return false;
}
if (tag==PinOwner::HW_I2C) i2cAllocCount++;
//if (tag==PinOwner::HW_I2C) DEBUG_PRINTF("I2C alloc counter %d\n", int(i2cAllocCount));
if (tag==PinOwner::HW_SPI) spiAllocCount++;
// all pins are available .. track each one
for (int i = 0; i < arrayElementCount; i++) {
byte gpio = mptArray[i].pin;
if (gpio == 0xFF) {
// allow callers to include -1 value as non-requested pin
// as this can greatly simplify configuration arrays
continue;
}
if (gpio >= WLED_NUM_PINS)
continue; // other unexpected GPIO => avoid array bounds violation
byte by = gpio >> 3;
byte bi = gpio - 8*by;
bitWrite(pinAlloc[by], bi, true);
ownerTag[gpio] = tag;
// ownerConflict[gpio] = PinOwner::None; // WLEDMM clear conflict (if any)
#ifdef WLED_DEBUG
DEBUG_PRINT(F("PIN ALLOC: Pin "));
DEBUG_PRINT(gpio);
DEBUG_PRINT(F(" allocated by "));
DebugPrintOwnerTag(tag);
DEBUG_PRINTLN(F(""));
#endif
}
return true;
}
bool PinManagerClass::allocatePin(byte gpio, bool output, PinOwner tag)
{
// HW I2C & SPI pins have to be allocated using allocateMultiplePins variant since there is always SCL/SDA pair
if (!isPinOk(gpio, output) || (gpio >= WLED_NUM_PINS) || tag==PinOwner::HW_I2C || tag==PinOwner::HW_SPI) {
#ifdef WLED_DEBUG
if (gpio < 255) { // 255 (-1) is the "not defined GPIO"
if (!isPinOk(gpio, output)) {
if ((gpio < WLED_NUM_PINS) && (gpio >= 0) && (tag != PinOwner::None)) {
ownerConflict[gpio] = tag; // WLEDMM record conflict
}
DEBUG_PRINT(F("PIN ALLOC: FAIL for owner "));
DebugPrintOwnerTag(tag);
DEBUG_PRINT(F(": GPIO ")); DEBUG_PRINT(gpio);
if (output) DEBUG_PRINTLN(F(" cannot be used for i/o on this MCU."));
else DEBUG_PRINTLN(F(" cannot be used as input on this MCU."));
} else {
DEBUG_PRINT(F("PIN ALLOC: FAIL: GPIO ")); DEBUG_PRINT(gpio);
DEBUG_PRINTLN(F(" - HW I2C & SPI pins have to be allocated using allocateMultiplePins()"));
}
}
#else // WLEDMM
if (gpio < 255) {
USER_PRINTF("PIN ALLOC: invalid pin - cannot use GPIO%d for %s.\n", gpio, output ? "output": "input");
}
#endif
return false;
}
if (isPinAllocated(gpio)) {
ownerConflict[gpio] = tag; // WLEDMM record conflict
#ifdef WLED_DEBUG
DEBUG_PRINT(F("PIN ALLOC: Pin "));
DEBUG_PRINT(gpio);
DEBUG_PRINT(F(" already allocated by "));
DebugPrintOwnerTag(ownerTag[gpio]);
DEBUG_PRINTLN(F(""));
#else // WLEDMM
USER_PRINTF("PIN ALLOC: failed to assign GPIO%d to %s - already in use for %s.\n", gpio, getOwnerText(tag).c_str(), getPinOwnerText(gpio).c_str());
#endif
return false;
}
byte by = gpio >> 3;
byte bi = gpio - 8*by;
bitWrite(pinAlloc[by], bi, true);
ownerTag[gpio] = tag;
// ownerConflict[gpio] = PinOwner::None; // WLEDMM clear conflict (if any)
#ifdef WLED_DEBUG
DEBUG_PRINT(F("PIN ALLOC: Pin "));
DEBUG_PRINT(gpio);
DEBUG_PRINT(F(" successfully allocated by "));
DebugPrintOwnerTag(tag);
DEBUG_PRINTLN(F(""));
#endif
return true;
}
// if tag is set to PinOwner::None, checks for ANY owner of the pin.
// if tag is set to any other value, checks if that tag is the current owner of the pin.
bool PinManagerClass::isPinAllocated(byte gpio, PinOwner tag)
{
if (!isPinOk(gpio, false)) return true;
if (gpio == 0xFF) {
DEBUG_PRINT(F(" isPinAllocated: -1 is never allocacted! "));
return false; // WLEDMM bugfix - avoid invalid index to array
}
if ((tag != PinOwner::None) && (ownerTag[gpio] != tag)) {
if ((ownerTag[gpio] != PinOwner::None) && (tag != PinOwner::HW_I2C) && (tag != PinOwner::HW_SPI)) ownerConflict[gpio] = tag; // WLEDMM record conflict
return false;
}
byte by = gpio >> 3;
byte bi = gpio - (by<<3);
return bitRead(pinAlloc[by], bi);
}
//
// WLEDMM: central handling of I2C startup (global Wire #0)
//
bool PinManagerClass::joinWire() { // shortcut in case no parameters provided
return joinWire(i2c_sda, i2c_scl);
}
bool PinManagerClass::joinWire(int8_t pinSDA, int8_t pinSCL) {
// reject PIN = -1, reject SDA=SCL, reject "forbidden" pins
if ( (pinSDA < 0) || (pinSCL < 0)
|| (pinSDA == pinSCL)
|| !isPinOk(pinSDA, true)
|| !isPinOk(pinSCL, true)) {
DEBUG_PRINT(F("PIN Manager: invalid GPIO for I2C: SDA="));
DEBUG_PRINTF("%d, SCL=%d !\n",pinSDA, pinSCL);
return(false);
}
if ((wire0PinSDA < 0) || (wire0PinSCL < 0)) wire0isStarted = false; // this should not happen
// if wire already started, reject any other GPIO
if ((wire0isStarted == true) &&
(pinSDA != wire0PinSDA) && (pinSDA != wire0PinSCL) && // allow "swapped pins2, i.e. SDA <->SCL
(pinSCL != wire0PinSCL) && (pinSCL != wire0PinSDA)) {
DEBUG_PRINT(F("PIN Manager: invalid GPIO for I2C: SDA="));
DEBUG_PRINTF("%d, SCL=%d. Wire already started with sda=%d and scl=%d!\n",pinSDA, pinSCL, wire0PinSDA, wire0PinSCL);
return(false);
}
// make sure pins are allocated
PinManagerPinType pins[2] = {{pinSCL, true}, {pinSDA, true}};
if (!allocateMultiplePins(pins, 2, PinOwner::HW_I2C)) { // this will only FAIL when pins are invalid, or used already for other purposes
DEBUG_PRINT(F("PIN Manager: failed to allocate GPIO for I2C: SDA="));
DEBUG_PRINTF("%d, SCL=%d !\n",pinSDA, pinSCL);
return(false);
}
if(wire0isStarted == true) {
DEBUG_PRINTLN(F("PIN Manager: all good, I2C already started, nothing to do :-)"));
return(true);
}
// NOW do it - start Wire !!! fire ;-)
bool wireIsOK = true;
#ifdef ARDUINO_ARCH_ESP32 // ESP32 - i2c pins can be mapped to any GPIO
wireIsOK = Wire.setPins(pinSDA, pinSCL); // this will fail if Wire is initialised already (i.e. Wire.begin() called prior)
#else // 8266 - I2C pins are fixed -> actually they are not.
//if((pinSDA != 4) || (pinSCL != 5)) { // fixed PINS: SDA = 4, SCL = 5
// DEBUG_PRINT(F("PIN Manager: warning ESP8266 I2C pins are fixed. please use SDA="));
// DEBUG_PRINTF("%d, SCL=%d !\n",4, 5);
// return(false);
//}
#endif
if (wireIsOK == false) {
USER_PRINTLN(F("PIN Manager: warning - wire.setPins failed!"));
}
#ifdef ARDUINO_ARCH_ESP32
wireIsOK = Wire.begin(pinSDA, pinSCL); // this will fail if wire is already running
#else
Wire.begin(pinSDA, pinSCL); // returns void on 8266
#endif
if (wireIsOK == false) {
USER_PRINTLN(F("PIN Manager: warning - wire.begin failed!"));
} else {
USER_PRINT(F("PIN Manager: wire.begin successfull! "));
USER_PRINT(F("I2C bus is active. SDA="));
USER_PRINTF("%d SCL=%d.\n", pinSDA, pinSCL);
}
#ifdef ARDUINO_ARCH_ESP32S3
Wire.setTimeOut(50); // workaround for wire timeout bug on -S3
Wire.setClock(400000); // 400kHz I2C clock. Comment this line if having wiring difficulties
#endif
wire0isStarted = true;
wire0PinSDA = pinSDA;
wire0PinSCL = pinSCL;
return(true);
}
/* see https://docs.espressif.com/projects/esp-idf/en/latest/esp32s3/api-reference/peripherals/gpio.html
* The ESP32-S3 chip features 45 physical GPIO pins (GPIO0 ~ GPIO21 and GPIO26 ~ GPIO48). Each pin can be used as a general-purpose I/O
* Strapping pins: GPIO0, GPIO3, GPIO45 and GPIO46 are strapping pins. For more infomation, please refer to ESP32-S3 datasheet.
* Serial TX = GPIO43, RX = GPIO44; LED BUILTIN is usually GPIO39
* USB-JTAG: GPIO 19 and 20 are used by USB-JTAG by default. In order to use them as GPIOs, USB-JTAG will be disabled by the drivers.
* SPI0/1: GPIO26-32 are usually used for SPI flash and PSRAM and not recommended for other uses.
* When using Octal Flash or Octal PSRAM or both, GPIO33~37 are connected to SPIIO4 ~ SPIIO7 and SPIDQS. Therefore, on boards embedded with ESP32-S3R8 / ESP32-S3R8V chip, GPIO33~37 are also not recommended for other uses.
*
* see https://docs.espressif.com/projects/esp-idf/en/v4.4.2/esp32s3/api-reference/peripherals/adc.html
* https://docs.espressif.com/projects/esp-idf/en/latest/esp32s3/api-reference/peripherals/adc_oneshot.html
* ADC1: GPIO1 - GPIO10 (channel 0..9)
* ADC2: GPIO11 - GPIO20 (channel 0..9)
* adc_power_acquire(): Please do not use the interrupt of GPIO36 and GPIO39 when using ADC or Wi-Fi and Bluetooth with sleep mode enabled. As a workaround, call adc_power_acquire() in the APP.
* Since the ADC2 module is also used by the Wi-Fi, reading operation of adc2_get_raw() may fail between esp_wifi_start() and esp_wifi_stop(). Use the return code to see whether the reading is successful.
*/
// Check if supplied GPIO is ok to use
bool PinManagerClass::isPinOk(byte gpio, bool output)
{
#ifdef ESP32
if (digitalPinIsValid(gpio)) {
#if defined(CONFIG_IDF_TARGET_ESP32C3)
// strapping pins: 2, 8, & 9
if (gpio > 11 && gpio < 18) return false; // 11-17 SPI FLASH
if (gpio > 17 && gpio < 20) return false; // 18-19 USB-JTAG
#elif defined(CONFIG_IDF_TARGET_ESP32S3)
// 00 to 18 are for general use. Be careful about straping pins GPIO0 and GPIO3 - these may be pulled-up or pulled-down on your board.
if (gpio > 18 && gpio < 21) return false; // 19 + 20 = USB-JTAG. Not recommended for other uses.
if (gpio > 21 && gpio < 33) return false; // 22 to 32: not connected + SPI FLASH
//if (gpio > 32 && gpio < 38) return false; // 33 to 37: not available if using _octal_ SPI Flash or _octal_ PSRAM
// 38 to 48 are for general use. Be careful about straping pins GPIO45 and GPIO46 - these may be pull-up or pulled-down on your board.
#elif defined(CONFIG_IDF_TARGET_ESP32S2)
// strapping pins: 0, 45 & 46
if (gpio > 18 && gpio < 21) return false; // WLEDMM: 19 + 20 = USB HWCDC. Not recommended for other uses.
if (gpio > 21 && gpio < 33) return false; // 22 to 32: not connected + SPI FLASH
// JTAG: GPIO39-42 are usually used for inline debugging
// GPIO46 is input only and pulled down
#else
if (gpio > 5 && gpio < 12) return false; //SPI flash pins
#endif
if (output) return digitalPinCanOutput(gpio);
else return true;
}
#else
if (gpio < 6) return true;
if (gpio < 12) return false; //SPI flash pins
if (gpio < 17) return true;
#endif
return false;
}
PinOwner PinManagerClass::getPinOwner(byte gpio) {
if (gpio >= WLED_NUM_PINS) return PinOwner::None; // catch error case, to avoid array out-of-bounds access
if (!isPinOk(gpio, false)) return PinOwner::None;
return ownerTag[gpio];
}
#ifdef ARDUINO_ARCH_ESP32
#if defined(CONFIG_IDF_TARGET_ESP32C3)
#define MAX_LED_CHANNELS 6
#else
#if defined(CONFIG_IDF_TARGET_ESP32S2) || defined(CONFIG_IDF_TARGET_ESP32S3)
#define MAX_LED_CHANNELS 8
#else
#define MAX_LED_CHANNELS 16
#endif
#endif
byte PinManagerClass::allocateLedc(byte channels)
{
if (channels > MAX_LED_CHANNELS || channels == 0) return 255;
byte ca = 0;
for (byte i = 0; i < MAX_LED_CHANNELS; i++) {
byte by = i >> 3;
byte bi = i - 8*by;
if (bitRead(ledcAlloc[by], bi)) { //found occupied pin
ca = 0;
} else {
ca++;
}
if (ca >= channels) { //enough free channels
byte in = (i + 1) - ca;
for (byte j = 0; j < ca; j++) {
byte b = in + j;
byte by = b >> 3;
byte bi = b - 8*by;
bitWrite(ledcAlloc[by], bi, true);
}
return in;
}
}
return 255; //not enough consecutive free LEDC channels
}
void PinManagerClass::deallocateLedc(byte pos, byte channels)
{
for (byte j = pos; j < pos + channels; j++) {
if (j > MAX_LED_CHANNELS) return;
byte by = j >> 3;
byte bi = j - 8*by;
bitWrite(ledcAlloc[by], bi, false);
}
}
#endif
PinManagerClass pinManager = PinManagerClass();
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