Sp31172 exe

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It may not display this or other websites correctly. You should upgrade or use an alternative browser. Status Not open for further replies. Linksys email support told me the problem was obviously with the laptop settings. I suspect the drivers for the laptop's NIC, but I'm having trouble updating them. Followed the instructions - no change to the NIC's driver.

Am I even going in the right direction focusing on the NIC driver? I don't know what to try next - any response would be greatly appreciated. New member. Message 1 of 4. HP Recommended. Operating System: Microsoft Windows 10 bit. Thanks, supporthp. Tags 1. Tags: Microsoft Windows 10 bit. I have the same question. Accepted Solutions. Level Message 2 of 4. Hi: Here are the links When the transaction data size is equal to or less than 32 bits, it will be sub-optimal to allocate a buffer for the data.

The data can be directly stored in the transaction struct instead. An SPI Host reads and writes data into memory byte by byte. If a value less than 8 bits needs to be sent, the bits should be written into memory in the MSB first manner.

To reduce coding complexity, send only one type of transactions interrupt or polling to one Device. However, you still can send both interrupt and polling transactions alternately. The notes below explain how to do this. The polling transactions should be initiated only after all the polling and interrupt transactions are finished.

In-flight polling transactions are disturbed by the ISR operation to accommodate interrupt transactions. To have better control of the calling sequence of functions, send mixed transactions to the same Device only within a single task.

The code and data, required at the meanwhile the driver is operating SPI1 bus, should be in the internal memory. The cache should be disabled during the other drivers are operating the SPI1 bus. Use the noflash placement in the linker. See more in Linker Script Generation. Please do take care that the optimization level may affect the compiler behavior of inline, or transforming some code into lookup table in the const data, etc.

However, the signals can also be routed to any other available pins using the less direct GPIO matrix. If at least one signal is routed through the GPIO matrix, then all signals will be routed through it. For more details about the influence of the MISO input delay on the maximum clock frequency, see Timing Considerations. The main parameter that determines the transfer speed for large transactions is clock frequency. For multiple small transactions, the transfer speed is mostly determined by the length of transaction intervals.

Interrupt transactions allow appending extra overhead to accommodate the cost of FreeRTOS queues and the time needed for switching between tasks and the ISR. For interrupt transactions , the CPU can switch to other tasks when a transaction is in progress.

This saves the CPU time but increases the transaction duration. See Interrupt Transactions. For polling transactions , it does not block the task but allows to do polling when the transaction is in progress.

For more information, see Polling Transactions. If DMA is enabled, setting up the linked list requires about 2 us per transaction. When a master is transferring data, it automatically reads the data from the linked list. Usually, this is faster than 2 us, but the transaction length is limited to 64 bytes for both write and read.

If the clock frequency is too high, the use of some functions might be limited. See Timing Considerations. Other SPI related functions, including the driver itself and the callback, might suffer from cache misses and will need to wait until the code is read from flash. An example of transferring speed at 8 MHz clock speed is given in the following table. When a transaction length is short, the cost of transaction interval is high. If possible, try to squash several short transactions into one transaction to achieve a higher transfer speed.

Please note that the ISR is disabled during flash operation by default. In this case, all the transactions queued before starting flash operations will be handled by the ISR in parallel. Also note that the callback of each Device and their callee functions should be in IRAM, or your callback will crash due to cache miss. Dummy bit workaround : Dummy clocks, during which the Host does not read data, can be inserted before the read phase begins.

The Device still sees the dummy clocks and sends out data, but the Host does not read until the read phase comes. This compensates for the lack of the MISO setup time required by the Host and allows the Host to do reading at a higher frequency. In the ideal case, if the Device is so fast that the input delay is shorter than an APB clock cycle - However, setting an accurate value helps to:.

Please note that the actual PCB layout design and excessive loads may increase the input delay. Some typical delay values are shown in the following table. These data are retrieved when the slave device is on a different physical chip.

This delay determines the frequency limit above which full-duplex transfers will not work as well as the dummy bits used in the half-duplex transactions. The frequency limit is:. The figure below shows the relationship between frequency limit and input delay. Corresponding frequency limits for different Devices with different input delay times are shown in the table below.

Half-duplex transactions are not compatible with DMA when both writing and reading phases are used. This can prohibit you from transmitting and receiving data longer than 64 bytes.

Try using the command and address fields to replace the write phase. Full-duplex transactions are not compatible with the dummy bit workaround , hence the frequency is limited. See dummy bit speed-up workaround. Warning In order for this to succeed, all devices have to be removed first. You can use this structure to specify the GPIO pins of the bus. Normally, the driver will use the GPIO matrix to route the signals.

Maximum transfer size, in bytes.