trying to configure TImer0 in its interrupt mode C5515?

Kieran Yu

Intellectual 525 points

i'm tring to confgure timer0 in int mode, from the registers i can see the

PCGCR1->TMROCG = active,

IER0->TINT = enable ,

timer0->TCR = 0x8003,

ST1_55->INTM = off,

however, IER0->TINT is always disable

what do i miss in configuring ?

and by the way, i feel CCS software may have a little bug in register address, the IER1 in the rigister may not be in right adress,

thanks

void main(void)
{
    #if DEBUG||(SOURCE != FROM_CODEC)
    Int16 i;
    #endif

#if (SOURCE != FROM_CODEC)
Int16 Sim_Index_L = 0;
Int16 Sim_Index_R = 0;
#endif

Int32 *FilterIn; // Pointer to filter input buffer

InitSystem();

Zero_Pad_Inputs(); // Zero-pad the input buffers in advance (zeros will not be overwritten)
Clear_COLA_Overlaps(); // Zero overlap buffers that hold Constant-Overlap-and-Add samples
FFT_Coeffs(); // Zero-pad and FFT coefficients outside of loop

init_gpt_0(700,0);

    ConfigPort();
    //SYS_GlobalIntEnable();
reset_RTC();

    IER0 = 0x0110;      // enable dma, timer int
    IER1 = 0x0004;      // enable RTC int

    SYS_GlobalIntEnable();

    setDMA_address();
    //set_i2s0_master(); // I2S0_CLK and I2S0_FS pins of DSP configured as outputs
    set_i2s0_slave();  // I2S0_CLK and I2S0_FS pins of DSP configured as inputs
    AIC3204_init();

    PLL_98MHz();

    start_gpt_0();

    while(1)    //waiting for timer0 interrupt
    {
    ;
    }

}

/*****************************************************************
* gpt_routine.c

****************************************************************/
#include <stdio.h>
#include "data_types.h"
#include "register_cpu.h"
#include "register_gpt.h"
#include "register_gpio.h"
#include "gpt_routine.h"

Uint16 flag = 1;

void start_gpt_0(void)
{
Uint16 prescale_divider;
/* 2：100M/2 = 50M */
prescale_divider = 0x0000;
//0x8003: Timer enable,autoload,start
TIMER_TIMER0_TCR |= prescale_divider<<2;
TIMER_TIMER0_TCR |= 0x0001;
}

void init_gpt_0(Uint16 timer_low_16bits,Uint16 timer_high_16bits)
{
    TIMER_TIMER0_TCR =0x0000;
    //80/2=40KHz
  TIMER_TIMER0_TIMPRD1 = timer_low_16bits; //LSW
TIMER_TIMER0_TIMPRD2 = timer_high_16bits; //MSW
TIMER_TIMER0_TIMCNT1 = 0xFFFF;
TIMER_TIMER0_TIMCNT2 = 0xFFFF;
TIMER_TIMER0_TCR = 0x8002;
//clear flag
//TIMER_TIAFR = 0x0007;
}

interrupt void gpt_0_Isr(void)
{
    Uint16 temp;
    temp = IFR0;
//clear timer int flag
    //IFR1 = temp|0x0010;
    IFR0 = temp|0x0010;
    //GPIO13 = ~GPIO13;
    if(flag)
    {
    GPIO_IODATAOUT1 = GPIO_IODATAOUT1&0xDFFF;
    flag = 0;
    }else
    {
    GPIO_IODATAOUT1 = GPIO_IODATAOUT1|0x2000;
    flag = 1;
    }
//clear the flag