Posted by Yash --Previous Message--
on April 22, 2003, 9:27:12, in reply to "Re: Using interrupts on EVB2623"
203.129.230.93
Hi GA,
Thanks. That solves my problem.
-Yash
: Yash,
: I would suspect that you are not
: enabling the TPU in the module
: stop register. By default this
: peripheral is disabled and must be
: enabled BEFORE any of its
: registers are accessed. You won't
: see this problem with HDI-M as
: part of HDI-M's initialisation
: enables all of the peripherals.
: The TPU can be enabled by clearing
: bit 5 in the MSTPCRA register.
: See the power down modes section
: of the hardware manual for more
: details.
: GA
: --Previous Message--
: Hi,
: I am using GNUH8 (h8300-coff-gcc) to
: build an application for EVB2623.
: Following is a simple interrupt
: program which works very well
: thro' HDI but when flashed does
: not work.
: The program simply toogles the LED on
: EVB ( port 1.5 ) when interrupt
: (Channel 3 overflow) is generated.
: I have made sure that program comes
: till while(1); loop using LED'
: (before interrupt is enabled)
: Am I missing something ?
: Could some help to solve the problem
: ?
: -----------------Program Start
: ---------------
: #include "ioh82623.h"
: typedef void (*fp) (void);
: void start (void);
: void timer3_OV_isr(void)
: __attribute__((interrupt_handler));
: __inline__ void set_interrupt_mask
: (unsigned char mask) __attribute__
: ((always_inline));
: extern __inline__ void
: set_interrupt_mask (unsigned char
: mask)
: {
: asm ("mov %0l,
: r0l"::"r"(mask));
: asm ("and.b #01,r0l"
;
: asm ("rotr.b r0l";
: asm ("ldc r0l,ccr";
: }
: const fp HardwareVectors[]
: __attribute__ ((section
: (".vects")) = {
: #ifndef ROMSTART // HDI-M / GDB-Stub
: - Shadow Vector
: 0x5a000000 + start, /* 0 - Reset
: vector */
: #else
: start, /* 0 - Reset vector */
: #endif
: (fp)(0), /* 1 - Manual reset */
: (fp)(0), (fp)(0), (fp)(0), /*
: 2,3,4 - Reserved */
: (fp)(0), /* 5 - Trace */
: (fp)(0), /* 6 - Direct Transitions
: */
: (fp)(0), /* 7 - NMI */
: (fp)(0), (fp)(0), (fp)(0), (fp)(0),
: /* 8,9,10,11 - Trap */
: (fp)(0), (fp)(0), (fp)(0), (fp)(0),
: /* 12,13,14,15 - Reserved */
: (fp)(0), /* 16 - IRQ0 */
: (fp)(0), /* 17 - IRQ1 */
: (fp)(0), /* 18 - IRQ2 */
: (fp)(0), /* 19 - IRQ3 */
: (fp)(0), /* 20 - IRQ4 */
: (fp)(0), /* 21 - IRQ5 */
: (fp)(0), (fp)(0), /* 22,23 -
: Reserved */
: (fp)(0), /* 24 - DTC*/
: (fp)(0), /* 25 - Watchdog timer 0
: */
: (fp)(0), /* 26 - Reserved */
: (fp)(0), /* 27 - PC Break */
: (fp)(0), /* 28 - AD */
: (fp)(0), /* 29 - Watchdog Timer 1
: */
: (fp)(0), (fp)(0), /* 30,31 -
: Reserved */
: /* 32 to 36 TPU Channel 0 */
: (fp)(0), /* 32 - TGI0A */
: (fp)(0), /* 33 - TGI0B */
: (fp)(0), /* 34 - TGI0C */
: (fp)(0), /* 35 - TGI0D */
: (fp)(0), /* 36 - TGI0V */
: (fp)(0), (fp)(0), (fp)(0),/* 37,38,
: 39 - Reserved */
: /* 40 to 43 TPU Channel 1 */
: (fp)(0), /* 40 - TGI1A */
: (fp)(0), /* 41 - TGI1B */
: (fp)(0), /* 42 - TGI1V */
: (fp)(0), /* 43 - TGI1U */
: /* 44 to 47 TPU Channel 2 */
: (fp)(0), /* 44 - TGI2A */
: (fp)(0), /* 45 - TGI2B */
: (fp)(0), /* 46 - TGI2V */
: (fp)(0), /* 47 - TGI2U */
: /* 48 to 52 TPU Channel 3 */
: (fp)(0), /* 48 - TGI3A */
: (fp)(0), /* 49 - TGI3B */
: (fp)(0), /* 50 - TGI3C */
: (fp)(0), /* 51 - TGI3D */
: #ifndef ROMSTART // HDI-M / GDB-Stub
: - Shadow Vector
: 0x5a000000 + timer3_OV_isr, /* 52 -
: TGI3V */
: #else
: timer3_OV_isr, /* 52 - TGI3V */
: #endif
: (fp)(0), (fp)(0), (fp)(0), /*
: 53,54, 55 - Reserved */
: };
:
: void timer3_OV_isr(void)
: {
: unsigned char c;
: /* Timer Status Register 3
: Bit 4 = Overflow clear */
: c = TPU_TSR3;
: P1DR ^= 0x20; /* Toggle LED */
: TPU_TCNT3 = 0x0000;
: TPU_TSR3 = c & 0xEF; /* Clear
: Overflow */
: }
: void timer3_init(void)
: {
: /* Channel 3 TCR - Timer Control
: Regiter
: Bit 7,6,5 - 0 ; TCNT Clearing
: Disabled
: Bit 4,3 - 0 ; Rising edge
: Bit 2,1,0 - 3 , Internal Clock /64
: */
: TPU_TCR3 = 0x3;
: /*
: Timer Mode Register TMDR3
: Bit 7,6 - 3 ; Reserved
: Bit 5 - 0 ; TGRB Operates normally
: Bit 4 - 0 ; TGRA Operates normally
: Bit 3,2,1,0 - 0 ; Normal operation
: */
: TPU_TMDR3 = 0xc0;
: /* Timer interrupt Enable register
: Bit 7 - 0 ; A/D conversion start
: request generation disabled
: Bit 6 = 0 ,5 = 1 ; Reserved
: Bit 4 = 1 ; Interrupt requests
: (TCIV) by TCFV enabled
: Bit 3,2,1,0 = 0 ; D,C,B and A
: disabled.
: */
: TPU_TIER3 = 0x30;
: /* Load Counter value */
: TPU_TCNT3 = 0x0000;
: ITU_TSTR = 0x08; /* Start Channel 3
: */
: set_interrupt_mask(0);
: }
: void hw_initialise (void)
: {
: ABWCR = 0xFC ; /* */
: ASTCR = 0xFF ; /* */
: WCRL = 0xFC ; /* */
: BCRH = 0xD0 ; /* */
: PFCR = 0x0F ; /* */
: PCDDR = 0xFF ; /* */
: }
: int main(void)
: {
: P1DDR |= 0x20; /* set port1/bit 5
: for output */
: timer3_init();
: while(1);
: }
: -----------------Program
: End---------------
: I can send the complete project if
: required.
: Thank you in advance.
: Yash
:
: :
:
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