127 lines
5.1 KiB
C
127 lines
5.1 KiB
C
#include "hardware.h"
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#include <driver/spi_master.h>
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#include <esp_log.h>
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#include <driver/gpio.h>
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#include "managed_i2c.h"
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static const char *TAG = "hardware";
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PCA9555 pca9555;
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void button_handler(uint8_t pin, bool value) {
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switch(pin) {
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case PCA9555_PIN_BTN_START:
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printf("Start button %s\n", value ? "pressed" : "released");
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break;
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case PCA9555_PIN_BTN_SELECT:
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printf("Select button %s\n", value ? "pressed" : "released");
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break;
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case PCA9555_PIN_BTN_MENU:
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printf("Menu button %s\n", value ? "pressed" : "released");
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break;
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case PCA9555_PIN_BTN_HOME:
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printf("Home button %s\n", value ? "pressed" : "released");
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break;
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case PCA9555_PIN_BTN_JOY_LEFT:
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printf("Joystick horizontal %s\n", value ? "left" : "center");
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break;
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case PCA9555_PIN_BTN_JOY_PRESS:
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printf("Joystick %s\n", value ? "pressed" : "released");
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break;
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case PCA9555_PIN_BTN_JOY_DOWN:
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printf("Joystick vertical %s\n", value ? "down" : "center");
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break;
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case PCA9555_PIN_BTN_JOY_UP:
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printf("Joy vertical %s\n", value ? "up" : "center");
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break;
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case PCA9555_PIN_BTN_JOY_RIGHT:
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printf("Joy horizontal %s\n", value ? "right" : "center");
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break;
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case PCA9555_PIN_BTN_BACK:
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printf("Back button %s\n", value ? "pressed" : "released");
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break;
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case PCA9555_PIN_BTN_ACCEPT:
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printf("Accept button %s\n", value ? "pressed" : "released");
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break;
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default:
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printf("Unknown button %d %s\n", pin, value ? "pressed" : "released");
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}
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}
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esp_err_t hardware_init() {
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esp_err_t res;
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// Interrupts
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res = gpio_install_isr_service(0);
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if (res != ESP_OK) {
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ESP_LOGE(TAG, "Initializing ISR service failed");
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return res;
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}
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// SPI bus
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spi_bus_config_t busConfiguration = {0};
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busConfiguration.mosi_io_num = GPIO_SPI_MOSI;
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busConfiguration.miso_io_num = GPIO_SPI_MISO;
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busConfiguration.sclk_io_num = GPIO_SPI_CLK;
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busConfiguration.quadwp_io_num = -1;
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busConfiguration.quadhd_io_num = -1;
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busConfiguration.max_transfer_sz = SPI_MAX_TRANSFER_SIZE;
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res = spi_bus_initialize(SPI_BUS, &busConfiguration, SPI_DMA_CHANNEL);
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if (res != ESP_OK) {
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ESP_LOGE(TAG, "Initializing SPI bus failed");
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return res;
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}
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// System I2C bus
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res = i2c_init(I2C_BUS_SYS, GPIO_I2C_SYS_SDA, GPIO_I2C_SYS_SCL, I2C_SPEED_SYS, false, false);
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if (res != ESP_OK) {
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ESP_LOGE(TAG, "Initializing system I2C bus failed");
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return res;
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}
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// PCA9555 IO expander on system I2C bus
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res = pca9555_init(&pca9555, I2C_BUS_SYS, PCA9555_ADDR, GPIO_INT_PCA9555);
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if (res != ESP_OK) {
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ESP_LOGE(TAG, "Initializing PCA9555 failed");
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return res;
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}
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pca9555_set_gpio_polarity(&pca9555, PCA9555_PIN_BTN_START, true);
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pca9555_set_gpio_polarity(&pca9555, PCA9555_PIN_BTN_SELECT, true);
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pca9555_set_gpio_polarity(&pca9555, PCA9555_PIN_BTN_MENU, true);
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pca9555_set_gpio_polarity(&pca9555, PCA9555_PIN_BTN_HOME, true);
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pca9555_set_gpio_polarity(&pca9555, PCA9555_PIN_BTN_JOY_LEFT, true);
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pca9555_set_gpio_polarity(&pca9555, PCA9555_PIN_BTN_JOY_PRESS, true);
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pca9555_set_gpio_polarity(&pca9555, PCA9555_PIN_BTN_JOY_DOWN, true);
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pca9555_set_gpio_polarity(&pca9555, PCA9555_PIN_BTN_JOY_UP, true);
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pca9555_set_gpio_polarity(&pca9555, PCA9555_PIN_BTN_JOY_RIGHT, true);
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pca9555_set_gpio_polarity(&pca9555, PCA9555_PIN_BTN_BACK, true);
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pca9555_set_gpio_polarity(&pca9555, PCA9555_PIN_BTN_ACCEPT, true);
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pca9555.pin_state = 0; // Reset all pin states so that the interrupt function doesn't trigger all the handlers because we inverted the polarity :D
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pca9555_set_interrupt_handler(&pca9555, PCA9555_PIN_BTN_START, button_handler);
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pca9555_set_interrupt_handler(&pca9555, PCA9555_PIN_BTN_SELECT, button_handler);
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pca9555_set_interrupt_handler(&pca9555, PCA9555_PIN_BTN_MENU, button_handler);
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pca9555_set_interrupt_handler(&pca9555, PCA9555_PIN_BTN_HOME, button_handler);
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pca9555_set_interrupt_handler(&pca9555, PCA9555_PIN_BTN_JOY_LEFT, button_handler);
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pca9555_set_interrupt_handler(&pca9555, PCA9555_PIN_BTN_JOY_PRESS, button_handler);
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pca9555_set_interrupt_handler(&pca9555, PCA9555_PIN_BTN_JOY_DOWN, button_handler);
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pca9555_set_interrupt_handler(&pca9555, PCA9555_PIN_BTN_JOY_UP, button_handler);
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pca9555_set_interrupt_handler(&pca9555, PCA9555_PIN_BTN_JOY_RIGHT, button_handler);
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pca9555_set_interrupt_handler(&pca9555, PCA9555_PIN_BTN_BACK, button_handler);
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pca9555_set_interrupt_handler(&pca9555, PCA9555_PIN_BTN_ACCEPT, button_handler);
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// User I2C bus
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res = i2c_init(I2C_BUS_EXT, GPIO_I2C_EXT_SDA, GPIO_I2C_EXT_SCL, I2C_SPEED_EXT, false, false);
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if (res != ESP_OK) {
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ESP_LOGE(TAG, "Initializing user I2C bus failed");
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return res;
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}
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return res;
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}
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PCA9555* get_pca9555() {
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return &pca9555;
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}
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