examples/peripherals/spi/spi_slave_half_duplex/main/xf_main.c

xf_hal spi 从机半双工示例。

 
/* ==================== [Includes] ========================================== */
 
#include "xf_hal.h"
#include "xf_task.h"
 
/* ==================== [Defines] =========================================== */
 
#define DEFAULT_SPEED               (1 * 1000 * 1000)
 
#define DEFAULT_SPI_ROLE            XF_HAL_SPI_HOSTS_SLAVE
#define DEFAULT_SPI_NUM             (0)
#define DEFAULT_SPI_SAMPLE_MODE     XF_HAL_SPI_MODE_0
 
#define DEFAULT_SPI_MOSI_IO_NUM     (9)
#define DEFAULT_SPI_MISO_IO_NUM     (11)
#define DEFAULT_SPI_SCLK_IO_NUM     (7)
#define DEFAULT_SPI_CS_IO_NUM       (10)
 
#define TASK_PRIORITY               5
#define TASK_DELAY_MS               2000
 
#define TAG "example_spi"
 
/* ==================== [Typedefs] ========================================== */
 
/* ==================== [Static Prototypes] ================================= */
 
static void spi_task(xf_task_t task);
 
/* ==================== [Static Variables] ================================== */
 
static bool is_next = false;
 
/* ==================== [Macros] ============================================ */
 
/* ==================== [Global Functions] ================================== */
 
void xf_main(void)
{
    xf_hal_spi_gpio_t spi_io_cfg = {
        .mosi_num = DEFAULT_SPI_MOSI_IO_NUM,
        .miso_num = DEFAULT_SPI_MISO_IO_NUM,
        .sclk_num = DEFAULT_SPI_SCLK_IO_NUM,
        .cs_num = DEFAULT_SPI_CS_IO_NUM,
        .quadhd_num = XF_HAL_GPIO_NUM_NONE,
        .quadwp_num = XF_HAL_GPIO_NUM_NONE,
    };
 
    xf_hal_spi_init(DEFAULT_SPI_NUM, DEFAULT_SPI_ROLE, DEFAULT_SPEED);
    xf_hal_spi_set_gpio(DEFAULT_SPI_NUM, &spi_io_cfg);
    xf_hal_spi_set_mode(DEFAULT_SPI_NUM, DEFAULT_SPI_SAMPLE_MODE);
    xf_hal_spi_enable(DEFAULT_SPI_NUM);
 
    xf_ttask_create_loop(spi_task, NULL, TASK_PRIORITY, TASK_DELAY_MS);
}
 
/* ==================== [Static Functions] ================================== */
 
static void spi_task(xf_task_t task)
{
    UNUSED(task);
    if (is_next == false) {
        XF_LOGI(TAG, "SPI slave read ... ...");
        uint8_t rbuf[32] = {0};
        int ret = xf_hal_spi_read(DEFAULT_SPI_NUM, rbuf, sizeof(rbuf), 1000);
        if (ret < 0) {
            return;
        }
        is_next = true;
        XF_LOGI(TAG, "READ cmpl:%s", rbuf);
    }
    if (is_next == true) {
        XF_LOGI(TAG, "SPI slave write ... ...");
        uint8_t wbuf[] = "I M SLAVE";
        int ret = xf_hal_spi_write(DEFAULT_SPI_NUM, wbuf, sizeof(wbuf), 1000);
        if (ret < 0) {
            return;
        }
        is_next = false;
        XF_LOGI(TAG, "WRITE CMPL");
    }
    return;
}