STM32F103C6 SPI to dataflash(M25p80) sending & receiving problem

[vinay]

Posted on February 11, 2015 at 14:51The original post was too long to process during our migration. Please click on the attachment to read the original post.

[stm322399]

Posted on February 11, 2015 at 15:10

Did you enable SPI1 peripheral clock ?

Can you observe SCK on PA5 with an o-scope ?

[vinay]

Posted on February 12, 2015 at 12:10

Yes ,

 clock was enabled and PA5 clock signal also getting on o-scope,But instead of 72 MHZ am getting only 64MHZ of clock frequency. I think that is not issue for SPI, Because SPI can able to run with maximum 50MHZ not more than that.Problem is data not getting into SPI_DR register .Remaining all SPI registers are working properly. If you have any clarity about the issue please help me out Sir.

[stm322399]

Posted on February 12, 2015 at 14:00

First advice: avoid running at 72 or 64 MHz during troubleshooting session, stay at 10MHz max

Second advice: show use code with all macro define necessary to understand. Example: what is SPI1 ? Is this SPI1 as defined in ST  CMSIS device header file (a pointer to a structure defining SPI registers) ? Or is SPI1 an integer that you use to index the p_stfSPIReg_all device table ? This is not clear, and maybe the source of your bug. Show us all function that you use that are not from SPL or HAL: SPI_Init (same name as SPL but not same argument type), and others. Last, tell us where you are blocked: /* Wait to receive a byte */   while (SPI_GetFlagBitStatus(SPI1, SPI_RXEN_INTERRUPT) == SPI_FLAGBIT_RESET); or // wait until transmit complete while(!(p_stfSPIReg_all[en_lDev]->SPI_SR & SPI_SR_RXNE_MASK ));