Kinetis MicrocontrollersのトピックRe: using problem with SPI on Kinetis K50 Tower

using problem with SPI on Kinetis K50 Tower

khris — Fri, 01 Jun 2012 17:27:03 GMT

Hello,

I am testing SPI on Kinetis K50 Tower, my problem is that when I init SPI register as :

SPI0_MCR = SPI_MCR_MSTR_MASK |

                          SPI_MCR_DIS_RXF_MASK |
               SPI_MCR_DIS_TXF_MASK | SPI_MCR_ROOE_MASK |
           SPI_MCR_HALT_MASK |
          SPI_MCR_PCSIS(1);

the cpu go in "hard fault" isr vector 3

If i write SPI0_MCR = 0 there is the same problem.

For information, with debugger it is not possible to write a value in this register.

I verify init MUX pin select and cpu version without result, all seem ok.

if someone have an idea ?

Thanks for your help

Re: using problem with SPI on Kinetis K50 Tower

konrada — Fri, 01 Jun 2012 18:37:02 GMT

Have you set the SIM_SCGC bits for the SPI component?
In a hard fault, look at SCB_CFSR, it tells you what kind of hard fault you're in.

Re: using problem with SPI on Kinetis K50 Tower

khris — Fri, 01 Jun 2012 20:16:23 GMT

very good, it 's bit 12 of SIM_SCG6

now there is acces to register and no "hard fault"

Thank you very much