voidspi_message_init_with_transfers(structspi_message*m,structspi_transfer*xfers,unsignedintnum_xfers) //2、检查是否支持每字位 boolspi_is_bpw_supported(structspi_device*spi,u32bpw) //3、计算一个合适的超时值 unsignedintspi_controller_xfer_timeout(structspi_controller*ctlr,structspi_transfer*xfer...
spi_message_init_with_transfers spi_message_init_with_transfers 可以一次性初始化一个spi_message对象并将一组spi_transfer结构体添加到其中。这样可以更方便地构建包含多个传输操作的SPI消息。源码位于 include\linux\spi\spi.h。 /** * spi_message_init_with_transfers - Initialize spi_message and append ...
//1、初始化spi_message并附加到transfer void spi_message_init_with_transfers(struct spi_message *m, struct spi_transfer *xfers, unsigned int num_xfers) //2、检查是否支持每字位 bool spi_is_bpw_supported(struct spi_device *spi, u32 bpw) //3、计算一个合适的超时值 unsigned int spi_controll...
1 /** 2 * spi_message_init_with_transfers - Initialize spi_message and append transfers 3 * @m: spi_message to be initialized 4 * @xfers: An array of spi transfers 5 * @num_xfers: Number of items in the xfer array 6 * 7 * This function initializes the given spi_message and ad...
以上两个API的组合,初始化一个spi_message并添加数个spi_transfer结构: 1/**2* spi_message_init_with_transfers - Initialize spi_message and append transfers3* @m: spi_message to be initialized4* @xfers: An array of spi transfers5* @num_xfers: Number of items in the xfer array6*7* This...
void spi_message_add_tail(struct spi_transfer *t, struct spi_message *m); void spi_transfer_del(struct spi_transfer *t); 以上两个API的组合,初始化一个spi_message并添加数个spi_transfer结构: void spi_message_init_with_transfers(struct spi_message *m, struct spi_transfer *xfers, unsigned in...
spi_sync：实现同步传输。spi_async：实现异步传输。spi_message_init：初始化SPI消息。spi_message_add_tail：构建SPI消息。spi_message_init_with_transfers：一次性初始化SPI消息，并添加一组传输操作。SPI消息处理：__spi_pump_messages：处理队列中的传输消息。spi_transfer_one_message：传输当前消息。
void spi_message_add_tail(struct spi_transfer *t, struct spi_message *m); void spi_transfer_del(struct spi_transfer *t); 以上两个API的组合,初始化一个spi_message并添加数个spi_transfer结构: void spi_message_init_with_transfers(struct spi_message *m, struct spi_transfer *xfers, unsigned in...
`spi_message_init_with_transfers`可以一次性初始化SPI消息，并添加一组传输操作，定义在`include\linux\spi\spi.h`文件。SPI数据传输可以是同步或异步方式。同步传输通过`spi_sync`函数实现，异步传输则使用`spi_async`函数，两者均在`drivers/spi/spi.c`文件中定义。异步传输中，`__spi_async`函数...
staticinline void spi_message_init(struct spi_message *m){memset(m, 0, sizeof *m);INIT_LIST_HEAD(&m->transfers);} 1. 2. 3. 4. 5. 初始化spi_message:清空message,初始化transfers链表头。 2.4.1.2. spi_message_add_tail 复制 staticinline voidspi_message_add_tail(struct spi_transfer *t...