Created
November 18, 2018 23:42
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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 = 8; | |
devcfg.mode = 0; | |
devcfg.duty_cycle_pos = 0; | |
devcfg.cs_ena_pretrans = 0; | |
devcfg.cs_ena_posttrans = 0; | |
devcfg.clock_speed_hz = 1000000; | |
devcfg.spics_io_num = CS_PIN; | |
devcfg.flags = SPI_DEVICE_HALFDUPLEX; | |
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 = SPI_TRANS_USE_RXDATA | SPI_TRANS_USE_TXDATA; | |
transaction.rxlength = 8; | |
transaction.length = 8; | |
ESP_ERROR_CHECK(spi_device_transmit(spi_device_handle, &transaction)); | |
vTaskDelay(50); | |
} | |
} |
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