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Dear Sir or Madam, I have got to execute the Brint0 interrupt using a routine written in assembly code. My code is the following: void Prueba_Roberto_Mode_2(void) { int i,j,dato,control[5],direccion,mispcr10,mispcr20; int IFR_value; /******* Configuraci de los registros de control para Data Mode *******/ asm(" SSBX INTM"); control[0]=0x8100; /*Palabra de control 1: registro B con DMCLK=MCLK; Serial Clock Divider=DMCLK/8; Decimation/Interpolation Rate=DMCLK/2048*/ control[1]=0x8279; /*Palabra de control 2: registro C con power-un device=On; ADC and DAC power=On; Ref power=On and Refout=On*/ control[2]=0x8300; /*Palabra de control 3: registro D con ganancias de 0 dB de entrada y 6 dB de salida*/ control[3]=0x8520; /*Palabra de control 4: registro F indica Single-Ended enabled*/ control[4]=0x8001; /*Palabra de control 4: registro A indica Data_Mode*/ for (i=0; i<5; i++) /*Escritura de los registros de control*/ { while (!MCBSP_xrdy(mhMcbsp)); MCBSP_write16 (mhMcbsp,control[i]); }; i=2; i=2; *IMR =0x0010;/*b*/ i=2; i=2; i=2; i=2;/*b prueba jorge linares*/ *IFR =0x0010; i=2;/*b*/ i=2;/*b*//*b prueba jorge linares*/ asm(" RSBX INTM");/*b*//*b prueba jorge linares*/ i=2; i=2;/*b*//*despu de aqusalta a bxint0*//*b prueba jorge linares*/ i=2; i=2;/*b*//*b prueba jorge linares*/ i=2; i=2;/*b prueba jorge linares*/ while(1) { } }/*Fin de Prueba_Roberto_Mode_2*/ And my Isr is: interrupt void lee_dato_2(void) /*void lee_dato(void)*/ { int i; DXR10=DRR10; i=2; i=2; i=2; } As you can see, it only copies the value of DXR10 into DRR10. I am using an external codec who is converting a 2 KHz sine wave and I want to read this data with the codec. This has to convert into digital signal which goes into the Dsp and Dsp has to output the same value at the DXR10 pin to go to the codec to be converted into an analog signal. When I push run button, my program is permanently in the while(1) in spite of the fact that the register DRR10 is receiving data and Spcr1007 (Rint is driven by rrdy) so the Brint0 should be executed . When I push halt button, I observe that the value of DXR10 register is 8100, which is the last value that the MCBSP_write16 (mhMcbsp,control[i]) instruction has written so the Brint0 has not be executed!!!. Consecuently, I do not observe any signal in the oscilloscope. If a put a breakpoint in the instructions before asm(" RSBX INTM"); my program stops there. When I push Run my program works properly and it goes to the Isr and I observe the proper signal in the oscilloscope. In conclusion, If I execute my program it does not execute any Brint0 interrupt in spite of the fact the Mcbsp0 port is receiving data. It needs a breakpoint in any instruction before enabling the maskable interrupts. What is the reason of this fact? Sincerely Roberto Espinosa Hernandez |
breakpoints and interrupts
Started by ●September 2, 2003
