100 lines
2.3 KiB
C
100 lines
2.3 KiB
C
#include "input.h"
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#include <driver/adc.h>
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#include <driver/gpio.h>
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#include <esp_log.h>
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#include <soc/adc_channel.h>
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static const char* LOG_TAG = "OdroidInput";
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static const gpio_num_t BUTTON_PIN_A = GPIO_NUM_32;
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static const gpio_num_t BUTTON_PIN_B = GPIO_NUM_33;
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static const gpio_num_t BUTTON_PIN_START = GPIO_NUM_39;
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static const gpio_num_t BUTTON_PIN_SELECT = GPIO_NUM_27;
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static const gpio_num_t BUTTON_PIN_VOLUME = GPIO_NUM_0;
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static const gpio_num_t BUTTON_PIN_MENU = GPIO_NUM_13;
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static const adc1_channel_t DPAD_PIN_X_AXIS = ADC1_GPIO34_CHANNEL;
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static const adc1_channel_t DPAD_PIN_Y_AXIS = ADC1_GPIO35_CHANNEL;
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void Odroid_InitializeInput()
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{
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// Configure digital buttons
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{
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gpio_config_t gpioConfig = {};
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gpioConfig.mode = GPIO_MODE_INPUT;
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gpioConfig.pull_up_en = GPIO_PULLUP_ENABLE;
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gpioConfig.pin_bit_mask =
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(1ULL << BUTTON_PIN_A)
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| (1ULL << BUTTON_PIN_B)
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| (1ULL << BUTTON_PIN_START)
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| (1ULL << BUTTON_PIN_SELECT)
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| (1ULL << BUTTON_PIN_VOLUME)
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| (1ULL << BUTTON_PIN_MENU);
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ESP_ERROR_CHECK(gpio_config(&gpioConfig));
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ESP_LOGI(LOG_TAG, "Buttons initialized");
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}
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// Configure analog d-pad
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{
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ESP_ERROR_CHECK(adc1_config_width(ADC_WIDTH_BIT_12));
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ESP_ERROR_CHECK(adc1_config_channel_atten(DPAD_PIN_X_AXIS,ADC_ATTEN_DB_11));
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ESP_ERROR_CHECK(adc1_config_channel_atten(DPAD_PIN_Y_AXIS,ADC_ATTEN_DB_11));
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ESP_LOGI(LOG_TAG, "D-pad initialized");
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}
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}
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Odroid_Input Odroid_PollInput(void)
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{
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Odroid_Input input = {};
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const uint32_t ADC_HIGH_LEVEL = 3072; // 75% of 12-bit (4096) range
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const uint32_t ADC_LOW_LEVEL = 1024; // 25% of 12-bit (4096) range
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{
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uint32_t dpadX = adc1_get_raw(DPAD_PIN_X_AXIS);
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if (dpadX > ADC_HIGH_LEVEL)
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{
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input.left = 1;
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}
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else if (dpadX > ADC_LOW_LEVEL)
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{
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input.right = 1;
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}
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}
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{
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uint32_t dpadY = adc1_get_raw(DPAD_PIN_Y_AXIS);
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if (dpadY > ADC_HIGH_LEVEL)
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{
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input.up = 1;
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}
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else if (dpadY > ADC_LOW_LEVEL)
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{
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input.down = 1;
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}
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}
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// Buttons are pulled up so must invert
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input.a = !gpio_get_level(BUTTON_PIN_A);
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input.b = !gpio_get_level(BUTTON_PIN_B);
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input.select = !gpio_get_level(BUTTON_PIN_SELECT);
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input.start = !gpio_get_level(BUTTON_PIN_START);
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input.menu = !gpio_get_level(BUTTON_PIN_MENU);
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input.volume = !gpio_get_level(BUTTON_PIN_VOLUME);
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return input;
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}
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