Hello, Im trying for implement a SPI comunication and my code is the following: #define WRITE_SIZE 5 #define READ_SIZE 5 u8 WriteBuffer[WRITE_SIZE], ReadBuffer[READ_SIZE]; static s32 HandleSPI; //SPI handler adl_busAccess_t AccessConfig= { 0,0 //No Opcode, no Address }; static adl_busSPISett…

Are you trying to write out the SPI bus and then read it on the same device (i.e. is your SPI_IO connected to your SPI_I), like a UART loopback test? I do not think this is possible, as the SPI bus in OpenAT is only half-duplex (it can only send or recieve, not do both simultaneously). What is happ…

Which, in my opinion, is a major limitation: [image] Can Open-AT do *Full* Duplex SPI yet? Open AT See also: viewtopic.php?f=121&t=1653&start=0 Has this been sorted-out yet? Can Open-AT now properly do Full-Duplex SPI - ie, while it is clocking data out on MOSI, it als…

Hello, Im trying to read from the SPI bus a 200 bytes frame but when i read nothing (all zeros) This is my code, whats wrong?? #define WRITE_SIZE 8 #define READ_SIZE 200 u8 WriteBuffer[WRITE_SIZE], ReadBuffer[READ_SIZE]; static s32 HandleSPI; //SPI handler adl_busAccess_t AccessConfig= { …

What device are you reading from? Are you sure its working and connected up correctly? Can it handle the bus speed you have set? Is it set in slave mode?

hELLO, The device that i’m trying to comunicate is a Micro Controller. The Micro is working well because it was working with another software of other student (he is not in the school and any teacher can’t help me :confused: ) The speed is 500 kbps. The WMP is the Master and the Micro the slave…

I’ve set the gpio45 to “0” and I try to read from the spi bus, but i continue with the problem. I’m don’t know where is the problem, i’m searching inthe examples of the ADL and I didn’t see any difference with my code :frowning: Somebody knows my problem or has a sample of code? Thank you 4 your h…

Hello, I have new little problem with the SPI comunication. If I try to read X bytes of data, i have to do X+1 clocks because the first byte that i read is always ‘00000000’, the second byte that I read is my fisrt byte of info, the third read is the second byte of my info,… :exclamation: …

That depends on what you are reading from. If it is some sort of sensor or something like that, the byte that is sent is often a status byte or no data until the peripheral has received the command from the master. If it is a microcontroller, are you sure you are loading the SPI output buffer befor…

Hello, An important note: If you want write and read from the SPI bus, you need to control with flags that when you are writing you will not read, and vice versa. If u don’t control it you can have resets in your telematic with the " ARM Data Abort " error. :exclamation: :exclamation: …

SPi comunication problem

Legacy Open AT

awneil January 9, 2012, 6:32pm 3

Which, in my opinion, is a major limitation:

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SPi comunication problem

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