f85d0239ff
- Implemented Elecrow Crowpanel Basic 5.0" - Implemented Elecrow Crowpanel Advance 5.0" - Implemented CYD 2432S032C - Fix for CYD 4848S040C rendering drift (lower transfer speed) - Fix for SD card locking mechanism for various boards
59 lines
2.3 KiB
C
59 lines
2.3 KiB
C
#include "esp_log.h"
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#include "driver/i2c.h"
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#include "TCA9534.h"
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#define I2C_MASTER_SCL_IO CONFIG_I2C_MASTER_SCL /*!< GPIO number used for I2C master clock */
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#define I2C_MASTER_SDA_IO CONFIG_I2C_MASTER_SDA /*!< GPIO number used for I2C master data */
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#define I2C_MASTER_NUM 0 /*!< I2C master i2c port number, the number of i2c peripheral interfaces available will depend on the chip */
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#define I2C_MASTER_FREQ_HZ 400000 /*!< I2C master clock frequency */
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#define I2C_MASTER_TX_BUF_DISABLE 0 /*!< I2C master doesn't need buffer */
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#define I2C_MASTER_RX_BUF_DISABLE 0 /*!< I2C master doesn't need buffer */
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/**
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* @brief i2c master initialization
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*/
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static esp_err_t i2c_master_init(i2c_config_t *conf) {
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int i2c_master_port = I2C_MASTER_NUM;
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conf->mode = I2C_MODE_MASTER;
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conf->master.clk_speed = I2C_MASTER_FREQ_HZ;
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conf->sda_io_num = I2C_MASTER_SDA_IO;
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conf->scl_io_num = I2C_MASTER_SCL_IO;
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conf->sda_pullup_en = GPIO_PULLUP_ENABLE;
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conf->scl_pullup_en = GPIO_PULLUP_ENABLE;
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i2c_param_config(i2c_master_port, conf);
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return i2c_driver_install(i2c_master_port, conf->mode, I2C_MASTER_RX_BUF_DISABLE, I2C_MASTER_TX_BUF_DISABLE, 0);
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}
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static const char *TAG = "TCA9534-Example";
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void app_main(void) {
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TCA9534_IO_EXP IO_EXP1;
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esp_err_t status = i2c_master_init(&IO_EXP1.i2c_conf);
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if (status == ESP_OK) {
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ESP_LOGI(TAG, "I2C initialized successfully");
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IO_EXP1.I2C_ADDR = 0b0100000;
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IO_EXP1.i2c_master_port = I2C_MASTER_NUM;
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set_tca9534_io_pin_direction(IO_EXP1, TCA9534_IO0, TCA9534_INPUT);
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set_tca9534_io_pin_direction(IO_EXP1, TCA9534_IO1, TCA9534_OUTPUT);
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int pin_state = 0;
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while (1) {
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pin_state = get_io_pin_input_status(IO_EXP1, TCA9534_IO0);
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if (pin_state == -1) {
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ESP_LOGE(TAG, "Cannot get pin status from TCA9534");
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break;
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}
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set_tca9534_io_pin_output_state(IO_EXP1, TCA9534_IO1, pin_state);
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vTaskDelay(100 / portTICK_RATE_MS);
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}
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ESP_ERROR_CHECK(i2c_driver_delete(I2C_MASTER_NUM));
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ESP_LOGI(TAG, "I2C unitialized successfully");
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}
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} |