Chris
89c875e38f
- Added bunch of screens, fonts and images - Added script to read out frame buffer (function currently disabled in Firmware)
161 lines
4.6 KiB
C
161 lines
4.6 KiB
C
/*
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* Rotary_Encoder.c
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*
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* Created: Mon Nov 29 2021 11:27:29
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* Author Chris
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*/
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// ============================================================================================
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// Includes
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#include "Rotary_Encoder.h"
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#include "pico/time.h"
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#include "pico/types.h"
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#include "pico/stdlib.h"
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#include "hardware/gpio.h"
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// ============================================================================================
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// Defines
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#define ENCODER_PIN_A_GPIO 25
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#define ENCODER_PIN_B_GPIO 24
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#define ENCODER_SWITCH_GPIO 27
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#define GPIO_IRQ_LEVEL_LOW 1
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#define GPIO_IRQ_LEVEL_HIGH 2
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#define GPIO_IRQ_EDGE_FALL 4
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#define GPIO_IRQ_EDGE_RISE 8
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#define SWITCH_IDLE 1
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#define SWITCH_PRESSED 0
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#define DEBOUNCE_TIME_ENCODER_MS 50
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#define DEBOUNCE_TIME_SWITCH_MS 300
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// Separate Switch Define
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#define SWITCH_GPIO 23
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// ============================================================================================
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// Variables
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static volatile uint32_t _Debounce_Time_Encoder_ms = 0;
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static volatile uint32_t _Debounce_Time_Switch_ms = 0;
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static volatile bool _Rotation_CW_Occurred;
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static volatile bool _Rotation_CCW_Occurred;
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static volatile bool _Rotary_Encoder_Switch_Press_Occurred;
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extern volatile uint32_t _Debounce_Time_Switch_ms;
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extern volatile bool _Switch_Press_Occurred; // Other switch - not from the Rotary Encoder
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static volatile uint8_t _Rotary_Encoder_Previous_NextCode = 0;
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static volatile uint16_t _Rotary_Encoder_Store_State = 0;
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static volatile int8_t _Rotary_Encoder_Table[] = { 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0 };
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// ============================================================================================
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// Function Declarations
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/*******************************************************************
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Interrupt Service Routines
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*******************************************************************/
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void ISR_Rotary_Encoder(uint gpio, uint32_t events)
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{
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if(gpio == ENCODER_PIN_A_GPIO || gpio == ENCODER_PIN_B_GPIO)
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{
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_Rotary_Encoder_Previous_NextCode <<= 2;
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if(gpio_get(ENCODER_PIN_A_GPIO)) { _Rotary_Encoder_Previous_NextCode |= 0x02; }
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if(gpio_get(ENCODER_PIN_B_GPIO)) { _Rotary_Encoder_Previous_NextCode |= 0x01; }
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_Rotary_Encoder_Previous_NextCode &= 0x0f;
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// If valid then _Rotary_Encoder_Store_State as 16 bit data.
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if(_Rotary_Encoder_Table[_Rotary_Encoder_Previous_NextCode])
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{
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_Rotary_Encoder_Store_State <<= 4;
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_Rotary_Encoder_Store_State |= _Rotary_Encoder_Previous_NextCode;
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if((_Rotary_Encoder_Store_State & 0xFF)==0x2B) { _Rotation_CCW_Occurred = true; }
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if((_Rotary_Encoder_Store_State & 0xFF)==0x17) { _Rotation_CW_Occurred = true; }
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}
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}
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else if(gpio == ENCODER_SWITCH_GPIO)
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{
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uint32_t Current_Time_ms = to_ms_since_boot(get_absolute_time());
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if(Current_Time_ms < _Debounce_Time_Switch_ms)
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{
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return;
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}
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_Rotary_Encoder_Switch_Press_Occurred = true;
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_Debounce_Time_Switch_ms = Current_Time_ms + DEBOUNCE_TIME_SWITCH_MS;
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}
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else if(gpio == SWITCH_GPIO)
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{
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uint32_t Current_Time_ms = to_ms_since_boot(get_absolute_time());
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if(Current_Time_ms < _Debounce_Time_Switch_ms)
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{
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return;
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}
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_Switch_Press_Occurred = true;
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_Debounce_Time_Switch_ms = Current_Time_ms + DEBOUNCE_TIME_SWITCH_MS;
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}
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}
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/*******************************************************************
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Functions
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*******************************************************************/
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void Rotary_Encoder_Init(void)
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{
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_Rotation_CW_Occurred = false;
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_Rotation_CCW_Occurred = false;
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_Rotary_Encoder_Switch_Press_Occurred = false;
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gpio_init(ENCODER_PIN_A_GPIO); gpio_set_dir(ENCODER_PIN_A_GPIO, false);
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gpio_init(ENCODER_PIN_B_GPIO); gpio_set_dir(ENCODER_PIN_B_GPIO, false);
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gpio_init(ENCODER_SWITCH_GPIO); gpio_set_dir(ENCODER_SWITCH_GPIO, false);
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gpio_set_irq_enabled_with_callback(ENCODER_PIN_A_GPIO, GPIO_IRQ_EDGE_RISE | GPIO_IRQ_EDGE_FALL, true, &ISR_Rotary_Encoder);
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gpio_set_irq_enabled(ENCODER_PIN_B_GPIO, GPIO_IRQ_EDGE_RISE | GPIO_IRQ_EDGE_FALL, true);
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gpio_set_irq_enabled(ENCODER_SWITCH_GPIO, GPIO_IRQ_EDGE_FALL , true);
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}
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bool Rotary_Encoder_Rotation_CW_Occurred(void)
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{
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bool Return_Value = _Rotation_CW_Occurred;
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_Rotation_CW_Occurred = false;
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return Return_Value;
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}
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bool Rotary_Encoder_Rotation_CCW_Occurred(void)
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{
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bool Return_Value = _Rotation_CCW_Occurred;
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_Rotation_CCW_Occurred = false;
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return Return_Value;
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}
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bool Rotary_Encoder_Switch_Press_Occurred(void)
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{
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bool Return_Value = _Rotary_Encoder_Switch_Press_Occurred;
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_Rotary_Encoder_Switch_Press_Occurred = false;
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return Return_Value;
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}
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/*******************************************************************
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Internal Functions
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*******************************************************************/
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