rt_err_t rt_spi_configure(struct rt_spi_device *device, struct rt_spi_configuration *cfg){ rt_err_t result; RT_ASSERT(device != RT_NULL); /* set configuration */ device->config.data_width = cfg->data_width; device->config.mode = cfg->mode & RT_SPI_MODE_MASK ; device->config.max_hz = cfg->max_hz ; if (device->bus != RT_NULL) { result = rt_mutex_take(&(device->bus->lock), RT_WAITING_FOREVER); if (result == RT_EOK) { if (device->bus->owner == device) { device->bus->ops->configure(device, &device->config); } /* release lock */ rt_mutex_release(&(device->bus->lock)); } } return RT_EOK;}
以sst25vfxx为例使用到device->bus->owner主要是以下2个函数，并没有对owner进行赋值 ，导致今天调试时发现底层的configure没有执行，请大家指教是我理解出错，还是其他原因。
rt_err_t sst25vfxx_init(const char * flash_device_name, const char * spi_device_name) /* config spi */ { struct rt_spi_configuration cfg; cfg.data_width = 8; cfg.mode = RT_SPI_MODE_0 | RT_SPI_MSB; /* SPI Compatible: Mode 0 and Mode 3 */ cfg.max_hz = 50000000; /* 50M */ rt_spi_configure(spi_flash->rt_spi_device, &cfg); }rt_err_t rt_spi_bus_register(struct rt_spi_bus *bus, const char *name, const struct rt_spi_ops *ops){ rt_err_t result; result = rt_spi_bus_device_init(bus, name); if (result != RT_EOK) return result; /* initialize mutex lock */ rt_mutex_init(&(bus->lock), name, RT_IPC_FLAG_FIFO); /* set ops */ bus->ops = ops; /* initialize owner */ bus->owner = RT_NULL; return RT_EOK;}
