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SPI master API 参考

SPI Master

struct transceive_t

Public Members

uint8_t *tx_buf: [input]pointer to transmit buffer, or NULL no data to be transmit

uint8_t *rx_buf: [output]pointer to transmit buffer, or NULL no data receive

uint8_t dummy_bits: [input] the dummy lenght in this transeceive, unit is bit

int wm_drv_spim_transceive_sync(wm_device_t *dev, const wm_dt_hw_spim_dev_cfg_t *config, transceive_t *desc, uint32_t ms_to_wait)

transceive data synchronously, the api return until synchronously done or timeout

参数:

dev – [in] SPI device pointer
config – [in] Pointer to a valid wm_hw_spi_device_config_t structure instance.
desc – [in] transceive descrption about tx and rx
ms_to_wait – [in] the max wait time for transeceive done, unit is millisecon

返回:

int wm_drv_spim_transceive_async(wm_device_t *dev, const wm_dt_hw_spim_dev_cfg_t *config, transceive_t *desc, wm_spim_callback_t callback, void *usr_data)

transceive data asynchronously, callback will be trigger after transceive done

参数:

dev – [in] SPI device pointer
config – [in] Pointer to a valid wm_hw_spi_device_config_t structure instance.
desc – [in] transceive descrption about tx and rx
callback – [in] the function will be trigger after transceive done
usr_data – [in] the argument for callback function

返回:

wm_device_t *wm_drv_spim_init(const char *dev_name)

Initialize SPI master driver.

参数:

dev_name – [in] spi master device name

返回:

int wm_drv_spim_deinit(wm_device_t *dev)

deinit SPI master driver

参数:

dev – [in] SPI master device pointer

返回: