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- #include <stdio.h>
- #include <stdbool.h>
- #include <esp_err.h>
- #include <freertos/FreeRTOS.h>
- #include <freertos/task.h>
- #include <driver/spi_master.h>
- #define CS_PIN GPIO_NUM_26
- #define CLK_PIN GPIO_NUM_25
- #define MOSI_PIN GPIO_NUM_22
- #define MISO_PIN GPIO_NUM_21
- void app_main(void)
- {
- spi_bus_config_t buscfg;
- buscfg.miso_io_num = MISO_PIN;
- buscfg.mosi_io_num = MOSI_PIN;
- buscfg.sclk_io_num = CLK_PIN;
- buscfg.quadwp_io_num = -1;
- buscfg.quadhd_io_num = -1;
- buscfg.max_transfer_sz = 0;
- buscfg.flags = 0;
- spi_device_interface_config_t devcfg;
- devcfg.command_bits = 8;
- devcfg.address_bits = 24;
- devcfg.dummy_bits = 0;
- devcfg.mode = 0;
- devcfg.duty_cycle_pos = 0;
- devcfg.cs_ena_pretrans = 0;
- devcfg.cs_ena_posttrans = 0;
- devcfg.clock_speed_hz = 8000000;
- devcfg.spics_io_num = CS_PIN;
- devcfg.flags = 0;
- devcfg.queue_size = 7;
- devcfg.pre_cb = 0;
- devcfg.post_cb = 0;
- devcfg.input_delay_ns = 0;
- ESP_ERROR_CHECK(spi_bus_initialize(HSPI_HOST, &buscfg, 0));
- spi_device_handle_t spi_device_handle;
- ESP_ERROR_CHECK(spi_bus_add_device(HSPI_HOST, &devcfg, &spi_device_handle));
- while (true)
- {
- spi_transaction_t transaction;
- transaction.cmd = 0x8F;
- transaction.addr = 0xABCD;
- transaction.flags = 0;
- transaction.rxlength = 0;
- transaction.length = 0;
- ESP_ERROR_CHECK(spi_device_transmit(spi_device_handle, &transaction));
- vTaskDelay(50);
- }
- }
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