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Brief PWM start

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peteGSX 2023-01-29 19:26:33 +10:00
parent ffb08523da
commit 28caa9e8d3
1 changed files with 52 additions and 24 deletions
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76
IO_EXIOExpander.h
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@ -1,5 +1,5 @@
/* /*
* © 2021, Peter Cole. All rights reserved. * © 2022, Peter Cole. All rights reserved.
* *
* This file is part of EX-CommandStation * This file is part of EX-CommandStation
* *
@ -26,19 +26,14 @@
* (Note the device driver is included by default) * (Note the device driver is included by default)
* *
* void halSetup() { * void halSetup() {
* // EXIOExpander::create(vpin, num_vpins, i2c_address, digitalPinCount, analoguePinCount); * // EXIOExpander::create(vpin, num_vpins, i2c_address);
* EXIOExpander::create(800, 18, 0x65, 12, 8); * EXIOExpander::create(800, 18, 0x65);
* } * }
* *
* Note when defining the number of digital and analogue pins, there is no way to sanity check * All pins on an EX-IOExpander device are allocated according to the pin map for the specific
* this from the device driver, and it is up to the user to define the correct values here. * device in use. There is no way for the device driver to sanity check pins are used for the
* * correct purpose, however the EX-IOExpander device's pin map will prevent pins being used
* All pins available on the EX-IOExpander device must be accounted for. * incorrectly (eg. A6/7 on Nano cannot be used for digital input/output).
*
* Vpins are allocated to digital pins first, and then analogue pins, so digital pins will
* populate the first part of the specified vpin range, with the analogue pins populating the
* last part of the vpin range.
* Eg. for a default Nano, 800 - 811 are digital (D2 - D13), 812 to 817 are analogue (A0 - A3, A6/A7).
*/ */
#ifndef IO_EX_IOEXPANDER_H #ifndef IO_EX_IOEXPANDER_H
@ -76,12 +71,15 @@ private:
_command2Buffer[0] = EXIOINIT; _command2Buffer[0] = EXIOINIT;
_command2Buffer[1] = _nPins; _command2Buffer[1] = _nPins;
// Send config, if EXIOINITA returned, we're good, setup analogue input buffer, otherwise go offline // Send config, if EXIOINITA returned, we're good, setup analogue input buffer, otherwise go offline
I2CManager.read(_i2cAddress, _receive2Buffer, 2, _command2Buffer, 2); I2CManager.read(_i2cAddress, _receive3Buffer, 3, _command2Buffer, 2);
if (_receive2Buffer[0] == EXIOINITA) { if (_receive3Buffer[0] == EXIOINITA) {
_numAnaloguePins = _receive2Buffer[1]; _numAnaloguePins = _receive3Buffer[1];
_numPWMPins = _receive3Buffer[2];
_analoguePinBytes = _numAnaloguePins * 2; _analoguePinBytes = _numAnaloguePins * 2;
_analogueInputStates = (byte*) calloc(_analoguePinBytes, 1); _analogueInputStates = (byte*) calloc(_analoguePinBytes, 1);
_analoguePinMap = (uint8_t*) calloc(_numAnaloguePins, 1); _analoguePinMap = (uint8_t*) calloc(_numAnaloguePins, 1);
_servoData = (struct ServoData*) calloc(_numPWMPins, 14);
} else { } else {
DIAG(F("ERROR configuring EX-IOExpander device, I2C:x%x"), _i2cAddress); DIAG(F("ERROR configuring EX-IOExpander device, I2C:x%x"), _i2cAddress);
_deviceState = DEVSTATE_FAILED; _deviceState = DEVSTATE_FAILED;
@ -109,15 +107,24 @@ private:
// Digital input pin configuration, used to enable on EX-IOExpander device and set pullups if in use // Digital input pin configuration, used to enable on EX-IOExpander device and set pullups if in use
bool _configure(VPIN vpin, ConfigTypeEnum configType, int paramCount, int params[]) override { bool _configure(VPIN vpin, ConfigTypeEnum configType, int paramCount, int params[]) override {
if (configType != CONFIGURE_INPUT) return false;
if (paramCount != 1) return false; if (paramCount != 1) return false;
bool pullup = params[0];
int pin = vpin - _firstVpin; int pin = vpin - _firstVpin;
_digitalOutBuffer[0] = EXIODPUP; if (configType == CONFIGURE_INPUT) {
_digitalOutBuffer[1] = pin; bool pullup = params[0];
_digitalOutBuffer[2] = pullup; _digitalOutBuffer[0] = EXIODPUP;
I2CManager.write(_i2cAddress, _digitalOutBuffer, 3); _digitalOutBuffer[1] = pin;
return true; _digitalOutBuffer[2] = pullup;
I2CManager.write(_i2cAddress, _digitalOutBuffer, 3);
return true;
} else if (configType == CONFIGURE_SERVO) {
DIAG(F("Configure servo at pin %d"), (int)pin);
for (int i = 0; i < paramCount; i++) {
DIAG(F("Param %d is %x"), (int)i, params[i]);
}
return true;
} else {
return false;
}
} }
// Analogue input pin configuration, used to enable on EX-IOExpander device // Analogue input pin configuration, used to enable on EX-IOExpander device
@ -175,7 +182,7 @@ private:
} }
uint8_t _i2cAddress; uint8_t _i2cAddress;
uint8_t _numAnaloguePins; uint8_t _numAnaloguePins = 0;
byte _digitalOutBuffer[3]; byte _digitalOutBuffer[3];
uint8_t _versionBuffer[3]; uint8_t _versionBuffer[3];
uint8_t _majorVer = 0; uint8_t _majorVer = 0;
@ -187,8 +194,29 @@ private:
uint8_t _analoguePinBytes = 0; uint8_t _analoguePinBytes = 0;
byte _command1Buffer[1]; byte _command1Buffer[1];
byte _command2Buffer[2]; byte _command2Buffer[2];
byte _receive2Buffer[2]; byte _receive3Buffer[3];
uint8_t* _analoguePinMap; uint8_t* _analoguePinMap;
uint8_t _numPWMPins = 0;
struct ServoData {
uint16_t activePosition : 12; // Config parameter
uint16_t inactivePosition : 12; // Config parameter
uint16_t currentPosition : 12;
uint16_t fromPosition : 12;
uint16_t toPosition : 12;
uint8_t profile; // Config parameter
uint16_t stepNumber; // Index of current step (starting from 0)
uint16_t numSteps; // Number of steps in animation, or 0 if none in progress.
uint8_t currentProfile; // profile being used for current animation.
uint16_t duration; // time (tenths of a second) for animation to complete.
} ServoData; // 14 bytes per element, i.e. per pin in use
struct ServoData* _servoData;
static const uint8_t _catchupSteps = 5; // number of steps to wait before switching servo off
static const byte FLASH _bounceProfile[30];
const unsigned int refreshInterval = 50; // refresh every 50ms
enum { enum {
EXIOINIT = 0xE0, // Flag to initialise setup procedure EXIOINIT = 0xE0, // Flag to initialise setup procedure