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|
//******************************************************************************
// @file InputDrv.cpp
// @author Nicolai Shlapunov
//
// @details DevCore: Input Driver Class, implementation
//
// @copyright Copyright (c) 2016, Devtronic & Nicolai Shlapunov
// All rights reserved.
//
// @section SUPPORT
//
// Devtronic invests time and resources providing this open source code,
// please support Devtronic and open-source hardware/software by
// donations and/or purchasing products from Devtronic.
//
//******************************************************************************
// *****************************************************************************
// *** Includes ************************************************************
// *****************************************************************************
#include "InputDrv.h"
#include "Rtos.h"
// *****************************************************************************
// *** Get Instance ********************************************************
// *****************************************************************************
InputDrv& InputDrv::GetInstance(void)
{
// This class is static and declared here
static InputDrv input_drv;
// Return reference to class
return input_drv;
}
// *****************************************************************************
// *** Init Input Driver Task **********************************************
// *****************************************************************************
void InputDrv::InitTask(TIM_HandleTypeDef* htm, ADC_HandleTypeDef* had)
{
// Save timer handle
htim = htm;
// Save ADC handle
hadc = had;
// Auto detect left input device
devices[EXT_LEFT] = DetectDeviceType(EXT_LEFT);
// Auto detect right input device
devices[EXT_RIGHT] = DetectDeviceType(EXT_RIGHT);
// Configure ADC
ConfigADC(devices[EXT_LEFT], devices[EXT_RIGHT]);
// Create task
CreateTask();
}
// *****************************************************************************
// *** Input Driver Setup **************************************************
// *****************************************************************************
Result InputDrv::Setup()
{
// If has timer handle and at least one device is encoder
if( (htim != nullptr)
&& ((devices[EXT_LEFT] == EXT_DEV_ENC) || (devices[EXT_RIGHT] == EXT_DEV_ENC)))
{
// Start timer for get interrupts. Should be there, because FreeRTOS
// must initialize tasks stacks before runs interrupt.
HAL_TIM_Base_Start_IT(htim);
}
// Init ticks variable
last_wake_ticks = RtosTick::GetTickCount();
// Always Ok
return Result::RESULT_OK;
}
// *****************************************************************************
// *** Input Driver Loop ***************************************************
// *****************************************************************************
Result InputDrv::Loop()
{
// Call interrupt handler
ProcessInput();
// Pause until next tick
RtosTick::DelayUntilMs(last_wake_ticks, 1U);
// Always run
return Result::RESULT_OK;
}
// *****************************************************************************
// *** Process Input function **********************************************
// *****************************************************************************
void InputDrv::ProcessInput(void)
{
// Cycle for process devices
for(uint32_t i = 0U; i < EXT_MAX; i++)
{
// Check device type
switch(devices[i])
{
// Process buttons device
case EXT_DEV_BTN:
// Process all buttons
for(uint32_t j = 0U; j < BTN_MAX; j++)
{
ProcessButtonInput(buttons[i].button[j]);
}
// Use buttons to set state of "virtual" encoder
EmulateEncodersByButtons((PortType)i);
break;
// Process encoder device
case EXT_DEV_ENC:
// If no timer handle
if(htim == nullptr)
{
// Process encoders input in task function
ProcessEncoderInput(encoders[i].enc);
}
// Always process encoder buttons in task function
ProcessButtonInput(encoders[i].btn[ENC_BTN_ENT]);
ProcessButtonInput(encoders[i].btn[ENC_BTN_BACK]);
break;
// Process joysticks device
case EXT_DEV_JOY:
// Process all joysticks
ProcessJoystickInput(joysticks[i].joy, (PortType)i);
// Process joystick button
ProcessButtonInput(joysticks[i].btn);
// Start measurement
HAL_ADCEx_InjectedStart(hadc);
// Use joystick to set state of "virtual" buttons
EmulateButtonsByJoystick((PortType)i);
// Use buttons to set state of "virtual" encoder
EmulateEncodersByButtons((PortType)i);
break;
case EXT_DEV_NONE:
case EXT_DEV_MAX:
default:
break;
}
}
}
// *****************************************************************************
// *** Process Button Input function ***************************************
// *****************************************************************************
void InputDrv::ProcessButtonInput(ButtonProfile& button)
{
// Read Button state
bool new_status = (HAL_GPIO_ReadPin(button.button_port, button.button_pin) == button.pin_state);
// No sense do something if button status already set
if(button.btn_state != new_status)
{
if((button.btn_state_tmp == new_status) && (button.btn_state_cnt == BUTTON_READ_DELAY))
{
// If temporary button state true and delay done - update state
button.btn_state = new_status;
}
else if(button.btn_state_tmp == new_status)
{
// If temporary button state true and delay not done - increase counter
button.btn_state_cnt++;
}
else
{
// If temporary button state true and delay not done - increase counter
button.btn_state_tmp = new_status;
button.btn_state_cnt = 0;
}
}
}
// *****************************************************************************
// *** Process Encoders Input function *************************************
// *****************************************************************************
void InputDrv::ProcessEncodersInput(void)
{
// Cycle for process devices
for(uint32_t i = 0U; i < EXT_MAX; i++)
{
// Check device type
if(devices[i] == EXT_DEV_ENC)
{
// Process encoder device
ProcessEncoderInput(encoders[i].enc);
}
}
}
// *****************************************************************************
// *** Process Encoder Input function **************************************
// *****************************************************************************
void InputDrv::ProcessEncoderInput(EncoderProfile& encoder)
{
// Read Button state
uint8_t en_new_status = (HAL_GPIO_ReadPin(encoder.enc_clk_port, encoder.enc_clk_pin) << 1) |
HAL_GPIO_ReadPin(encoder.enc_data_port, encoder.enc_data_pin);
// States must be different
if(en_new_status != encoder.enc_state)
{
// We check only rise front on CLK pulse
if( ((en_new_status >> 1) == 1) && ((encoder.enc_state >> 1) == 0) )
{
// State of DATA input must be same during CLK pulse rise
if( (en_new_status & 1) == (encoder.enc_state & 1) )
{
// If DATA 1 - rotate in one side, if 0 - in another
if((en_new_status & 1) == 0)
{
// Increment encoder counter
encoder.enc_cnt++;
}
else
{
// Decrement encoder counter
encoder.enc_cnt--;
}
}
}
// Save new encoder state
encoder.enc_state = en_new_status;
}
}
// *****************************************************************************
// *** Process Joystick Input function *************************************
// *****************************************************************************
void InputDrv::ProcessJoystickInput(JoystickProfile& joystick, PortType port)
{
// Get value for X channel, add it to previous value
joystick.x_ch_val += HAL_ADCEx_InjectedGetValue(hadc, ((uint32_t)port << 1U) + 1U);
joystick.x_ch_val /= 2; // Find average of two values
// Get value for X channel, add it to previous value
joystick.y_ch_val += HAL_ADCEx_InjectedGetValue(hadc, ((uint32_t)port << 1U) + 2U);
joystick.y_ch_val /= 2; // Find average of two values
}
// *****************************************************************************
// *** Emulate buttons using joystick function *****************************
// *****************************************************************************
void InputDrv::EmulateButtonsByJoystick(PortType port)
{
// Center values
int32_t x_val;
int32_t y_val;
// If X channel is inverted
if(joysticks[port].joy.x_inverted == true)
{
// Return inverted X state
x_val = ADC_MAX_VAL - joysticks[port].joy.x_ch_val - ADC_MAX_VAL/2;
}
else
{
// Return inverted X state
x_val = joysticks[port].joy.x_ch_val - ADC_MAX_VAL/2;
}
// If Y channel is inverted
if(joysticks[port].joy.y_inverted == true)
{
// Return inverted Y state
y_val = ADC_MAX_VAL - joysticks[port].joy.y_ch_val - ADC_MAX_VAL/2;
}
else
{
// Return Y state
y_val = joysticks[port].joy.y_ch_val - ADC_MAX_VAL/2;
}
// Button left
if(x_val < -JOY_THRESHOLD)
{
buttons[port].button[BTN_LEFT].btn_state = true;
}
else
{
buttons[port].button[BTN_LEFT].btn_state = false;
}
// Button right
if(x_val > JOY_THRESHOLD)
{
buttons[port].button[BTN_RIGHT].btn_state = true;
}
else
{
buttons[port].button[BTN_RIGHT].btn_state = false;
}
// Button up
if(y_val < -JOY_THRESHOLD)
{
buttons[port].button[BTN_UP].btn_state = true;
}
else
{
buttons[port].button[BTN_UP].btn_state = false;
}
// Button down
if(y_val > JOY_THRESHOLD)
{
buttons[port].button[BTN_DOWN].btn_state = true;
}
else
{
buttons[port].button[BTN_DOWN].btn_state = false;
}
}
// *****************************************************************************
// *** Emulate encoders using buttons function *****************************
// *****************************************************************************
void InputDrv::EmulateEncodersByButtons(PortType port)
{
// Buttons previous states
static bool btn_left[EXT_MAX];
static bool btn_right[EXT_MAX];
// If left button changed
if(buttons[port].button[BTN_LEFT].btn_state != btn_left[port])
{
// Save button state
btn_left[port] = buttons[port].button[BTN_LEFT].btn_state;
// If button pressed
if(btn_left[port])
{
// Decrease encoder counter
encoders[port].enc.enc_cnt--;
}
}
// If right button changed
if(buttons[port].button[BTN_RIGHT].btn_state != btn_right[port])
{
// Save button state
btn_right[port] = buttons[port].button[BTN_RIGHT].btn_state;
// If button pressed
if(btn_right[port])
{
// Decrease encoder counter
encoders[port].enc.enc_cnt++;
}
}
// Copy state of down button to encoder button
encoders[port].btn[ENC_BTN_ENT] = buttons[port].button[BTN_DOWN];
encoders[port].btn[ENC_BTN_BACK]= buttons[port].button[BTN_UP];
}
// *****************************************************************************
// *** Get device type *****************************************************
// *****************************************************************************
InputDrv::ExtDeviceType InputDrv::GetDeviceType(PortType port)
{
// Return current state of button
return devices[port];
}
// *****************************************************************************
// *** Get button state ****************************************************
// *****************************************************************************
bool InputDrv::GetButtonState(PortType port, ButtonType button)
{
// Return current state of button
return buttons[port].button[button].btn_state;
}
// *****************************************************************************
// *** Get button state ****************************************************
// *****************************************************************************
bool InputDrv::GetButtonState(PortType port, ButtonType button, bool& btn_state)
{
bool ret = false;
// If button state changed
if(buttons[port].button[button].btn_state != btn_state)
{
// Store new state
btn_state = buttons[port].button[button].btn_state;
ret = true;
}
// Return result
return ret;
}
// *****************************************************************************
// *** Get encoder counts from last call - CAN BE CALLED FROM ONE TASK *****
// *****************************************************************************
int32_t InputDrv::GetEncoderState(PortType port)
{
return GetEncoderState(port, last_enc_value[port]);
}
// *****************************************************************************
// *** Get encoder counts from last call ***********************************
// *****************************************************************************
int32_t InputDrv::GetEncoderState(PortType port, int32_t& last_enc_val)
{
// Get current state - atomic operation, prevent multitasking problems
int32_t enc_val = encoders[port].enc.enc_cnt;
// Calculate return value
int32_t retval = enc_val - last_enc_val;
// Save current count to user provided variable
last_enc_val = enc_val;
// return result
return retval;
}
// *****************************************************************************
// *** Get encoder button state ********************************************
// *****************************************************************************
bool InputDrv::GetEncoderButtonCurrentState(PortType port, EncButtonType button)
{
// Return current state of button
return encoders[port].btn[button].btn_state;
}
// *****************************************************************************
// *** Get encoder button state ********************************************
// *****************************************************************************
bool InputDrv::GetEncoderButtonState(PortType port, EncButtonType button)
{
return GetEncoderButtonState(port, button, enc_btn_value[port][button]);
}
// *****************************************************************************
// *** Get encoder button state ********************************************
// *****************************************************************************
bool InputDrv::GetEncoderButtonState(PortType port, EncButtonType button, bool& btn_state)
{
bool ret = false;
// If button state changed
if(encoders[port].btn[button].btn_state != btn_state)
{
// store new state
btn_state = encoders[port].btn[button].btn_state;
ret = true;
}
// Return result
return ret;
}
// *****************************************************************************
// *** Get joystick axis state *********************************************
// *****************************************************************************
void InputDrv::GetJoystickState(PortType port, int32_t& x, int32_t& y)
{
// If X channel is inverted
if(joysticks[port].joy.x_inverted == true)
{
// Return inverted X state
x = ADC_MAX_VAL - joysticks[port].joy.x_ch_val;
}
else
{
// Return inverted X state
x = joysticks[port].joy.x_ch_val;
}
// If Y channel is inverted
if(joysticks[port].joy.y_inverted == true)
{
// Return inverted Y state
y = ADC_MAX_VAL - joysticks[port].joy.y_ch_val;
}
else
{
// Return Y state
y = joysticks[port].joy.y_ch_val;
}
// Calculate X
if(x > joysticks[port].joy.bx)
{
x = ((x - joysticks[port].joy.bx) * joysticks[port].joy.kxmax) / COEF;
}
else
{
x = ((x - joysticks[port].joy.bx) * joysticks[port].joy.kxmin) / COEF;
}
// Calculate Y
if(y > joysticks[port].joy.by)
{
y = ((y - joysticks[port].joy.by) * joysticks[port].joy.kymax) / COEF;
}
else
{
y = ((y - joysticks[port].joy.by) * joysticks[port].joy.kymin) / COEF;
}
}
// *****************************************************************************
// *** SetJoystickCalibrationConsts ****************************************
// *****************************************************************************
// * Set calibration constants. Must be call for calibration joystick.
void InputDrv::SetJoystickCalibrationConsts(PortType port, int32_t x_mid,
int32_t x_kmin, int32_t x_kmax,
int32_t y_mid, int32_t y_kmin,
int32_t y_kmax)
{
// X axis calibration
joysticks[port].joy.bx = x_mid;
joysticks[port].joy.kxmin = x_kmin;
joysticks[port].joy.kxmax = x_kmax;
// Y axis calibration
joysticks[port].joy.by = y_mid;
joysticks[port].joy.kymin = y_kmin;
joysticks[port].joy.kymax = y_kmax;
}
// *****************************************************************************
// *** Get joystick button state *******************************************
// *****************************************************************************
bool InputDrv::GetJoystickButtonState(PortType port)
{
// Return current state of button
return joysticks[port].btn.btn_state;
}
// *****************************************************************************
// *** Get joystick button state *******************************************
// *****************************************************************************
bool InputDrv::GetJoystickButtonState(PortType port, bool& btn_state)
{
bool ret = false;
// If button state changed
if(joysticks[port].btn.btn_state != btn_state)
{
// store new state
btn_state = joysticks[port].btn.btn_state;
ret = true;
}
// Return result
return ret;
}
// *****************************************************************************
// *** Configure inputs devices types **************************************
// *****************************************************************************
InputDrv::ExtDeviceType InputDrv::DetectDeviceType(PortType port)
{
// Return variable
ExtDeviceType ret = EXT_DEV_NONE;
// Variable to store X axis value
int32_t x_val;
// Variable to store Y axis value
int32_t y_val;
if(hadc != nullptr)
{
// Config ADC for measure
if(port == EXT_LEFT) ConfigADC(EXT_DEV_JOY, EXT_DEV_NONE);
if(port == EXT_RIGHT) ConfigADC(EXT_DEV_NONE, EXT_DEV_JOY);
// Start measurement
HAL_ADCEx_InjectedStart(hadc);
// Wait until End of Conversion flag is raised
while(HAL_IS_BIT_CLR(hadc->Instance->SR, ADC_FLAG_JEOC));
x_val = HAL_ADCEx_InjectedGetValue(hadc, (port << 1) + 1);
y_val = HAL_ADCEx_InjectedGetValue(hadc, (port << 1) + 2);
// Center values
x_val -= ADC_MAX_VAL/2;
y_val -= ADC_MAX_VAL/2;
// If at least one value near center
if( ((x_val > -JOY_THRESHOLD) && (x_val < JOY_THRESHOLD))
|| ((y_val > -JOY_THRESHOLD) && (y_val < JOY_THRESHOLD)))
{
// Joystick connected
ret = EXT_DEV_JOY;
}
else
{
// Stop ADC before switch to digital inputs
HAL_ADCEx_InjectedStop(hadc);
// Config input IO to digital
ConfigInputIO(true, port);
}
}
else
{
// Config input IO to digital
ConfigInputIO(true, port);
}
// If Joystick not detected
if(ret == EXT_DEV_NONE)
{
// Configure GPIO pins for detect devices
GPIO_InitTypeDef GPIO_InitStruct;
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_PULLDOWN;
GPIO_InitStruct.Pin = encoders[port].btn[ENC_BTN_BACK].button_pin;
HAL_GPIO_Init(encoders[port].btn[ENC_BTN_BACK].button_port, &GPIO_InitStruct);
// If pin state low - encoder
if(HAL_GPIO_ReadPin(encoders[port].btn[ENC_BTN_BACK].button_port,
encoders[port].btn[ENC_BTN_BACK].button_pin) == GPIO_PIN_RESET)
{
ret = EXT_DEV_ENC;
}
else
{
ret = EXT_DEV_BTN;
}
// Restore GPIO pins configuration
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Pin = buttons[port].button[BTN_LEFT].button_pin;
HAL_GPIO_Init(buttons[port].button[BTN_LEFT].button_port, &GPIO_InitStruct);
}
return ret;
}
// *****************************************************************************
// *** Config ADC **********************************************************
// *****************************************************************************
void InputDrv::ConfigADC(ExtDeviceType dev_left, ExtDeviceType dev_right)
{
// We can configure ADC only if ADC handle is not nullptr and at least one
// joystick present
if( (hadc != nullptr)
&& ((dev_left == EXT_DEV_JOY) || (dev_right == EXT_DEV_JOY)))
{
// Update ADC settings - should be Scan mode
#if defined(STM32F1)
hadc->Init.ScanConvMode = ADC_SCAN_ENABLE;
#elif defined(STM32F4)
hadc->Init.ScanConvMode = ENABLE;
#endif
// Init ADC
if (HAL_ADC_Init(hadc) != HAL_OK)
{
Error_Handler();
}
// Structure for init Injected Channel
ADC_InjectionConfTypeDef sConfigInjected;
// Configure Injected Channel
sConfigInjected.InjectedNbrOfConversion = EXT_MAX*2;
#if defined(STM32F1)
sConfigInjected.InjectedSamplingTime = ADC_SAMPLETIME_239CYCLES_5;
#elif defined(STM32F4)
sConfigInjected.InjectedSamplingTime = ADC_SAMPLETIME_480CYCLES;
#endif
sConfigInjected.ExternalTrigInjecConv = ADC_INJECTED_SOFTWARE_START;
sConfigInjected.AutoInjectedConv = DISABLE;
sConfigInjected.InjectedDiscontinuousConvMode = DISABLE;
sConfigInjected.InjectedOffset = 0;
sConfigInjected.InjectedRank = 1;
// Channels
uint32_t injected_channels[EXT_MAX*2] = {0,0,0,0};
// If both devices - joysticks
if((dev_left == EXT_DEV_JOY) && (dev_right == EXT_DEV_JOY))
{
// Left joystick
injected_channels[0] = joysticks[EXT_LEFT].joy.x_channel;
injected_channels[1] = joysticks[EXT_LEFT].joy.y_channel;
// Right joystick
injected_channels[2] = joysticks[EXT_RIGHT].joy.x_channel;
injected_channels[3] = joysticks[EXT_RIGHT].joy.y_channel;
}
// If only left joystick present
else if(dev_left == EXT_DEV_JOY)
{
// Left joystick for all channels
injected_channels[0] = joysticks[EXT_LEFT].joy.x_channel;
injected_channels[1] = joysticks[EXT_LEFT].joy.y_channel;
injected_channels[2] = joysticks[EXT_LEFT].joy.x_channel;
injected_channels[3] = joysticks[EXT_LEFT].joy.y_channel;
}
// If only right joystick present
else if(dev_right == EXT_DEV_JOY)
{
// Right joystick for all channels
injected_channels[0] = joysticks[EXT_RIGHT].joy.x_channel;
injected_channels[1] = joysticks[EXT_RIGHT].joy.y_channel;
injected_channels[2] = joysticks[EXT_RIGHT].joy.x_channel;
injected_channels[3] = joysticks[EXT_RIGHT].joy.y_channel;
}
else
{
// FIX ME: CATCH ERROR HERE !!!
}
// Cycle for init Injected channels
for(uint32_t i = 0U; i < NumberOf(injected_channels); i++)
{
// Configure Injected Channel - X axis
sConfigInjected.InjectedChannel = injected_channels[i];
if (HAL_ADCEx_InjectedConfigChannel(hadc, &sConfigInjected) != HAL_OK)
{
Error_Handler();
}
// Increase rank counter
sConfigInjected.InjectedRank++;
}
}
}
// *****************************************************************************
// *** Configure inputs for read digital/analog data ***********************
// *****************************************************************************
void InputDrv::ConfigInputIO(bool is_digital, PortType port)
{
// Structure for set IO parameters
GPIO_InitTypeDef GPIO_InitStruct;
// Set no pull - no effect if analog mode selected
GPIO_InitStruct.Pull = GPIO_NOPULL;
// Check requested mode
if(is_digital == true)
{
// Set input mode
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
}
else
{
// Set analog mode
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
}
// Configure GPIO pins : EXT_L1_Pin
GPIO_InitStruct.Pin = joysticks[port].joy.x_pin;
HAL_GPIO_Init(joysticks[port].joy.x_port, &GPIO_InitStruct);
// Configure GPIO pins : EXT_L2_Pin
GPIO_InitStruct.Pin = joysticks[port].joy.y_pin;
HAL_GPIO_Init(joysticks[port].joy.y_port, &GPIO_InitStruct);
}
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