マクロ定義 | |
| #define | TIMER_FREQ(n) (-0x2000000/(n)) |
| A macro that calculates TIMER_DATA(n) settings for a given frequency of n. | |
| #define | TIMER_FREQ_64(n) (-(0x2000000>>6)/(n)) |
| A macro that calculates TIMER_DATA(n) settings for a given frequency of n. | |
| #define | TIMER_FREQ_256(n) (-(0x2000000>>8)/(n)) |
| A macro that calculates TIMER_DATA(n) settings for a given frequency of n. | |
| #define | TIMER_FREQ_1024(n) (-(0x2000000>>10)/(n)) |
| A macro that calculates TIMER_DATA(n) settings for a given frequency of n. | |
| #define | TIMER0_DATA (*(vuint16*)0x04000100) |
| Same as TIMER_DATA(0). | |
| #define | TIMER1_DATA (*(vuint16*)0x04000104) |
| Same as TIMER_DATA(1). | |
| #define | TIMER2_DATA (*(vuint16*)0x04000108) |
| Same as TIMER_DATA(2). | |
| #define | TIMER3_DATA (*(vuint16*)0x0400010C) |
| Same as TIMER_DATA(3). | |
| #define | TIMER_DATA(n) (*(vuint16*)(0x04000100+((n)<<2))) |
| Returns a dereferenced pointer to the data register for timer number "n". | |
| #define | TIMER0_CR (*(vuint16*)0x04000102) |
| Same as TIMER_CR(0). | |
| #define | TIMER1_CR (*(vuint16*)0x04000106) |
| Same as TIMER_CR(1). | |
| #define | TIMER2_CR (*(vuint16*)0x0400010A) |
| Same as TIMER_CR(2). | |
| #define | TIMER3_CR (*(vuint16*)0x0400010E) |
| Same as TIMER_CR(3). | |
| #define | TIMER_CR(n) (*(vuint16*)(0x04000102+((n)<<2))) |
| Returns a dereferenced pointer to the data register for timer control Register. | |
| #define | TIMER_ENABLE (1<<7) |
| Enables the timer. | |
| #define | TIMER_IRQ_REQ (1<<6) |
| Causes the timer to request an Interupt on overflow. | |
| #define | TIMER_CASCADE (1<<2) |
| When set will cause the timer to count when the timer below overflows (unavailable for timer 0). | |
| #define | TIMER_DIV_1 (0) |
| Causes the timer to count at 33.514Mhz. | |
| #define | TIMER_DIV_64 (1) |
| Causes the timer to count at (33.514 / 64) Mhz. | |
| #define | TIMER_DIV_256 (2) |
| Causes the timer to count at (33.514 / 256) Mhz. | |
| #define | TIMER_DIV_1024 (3) |
| Causes the timer to count at (33.514 / 1024)Mhz. | |
| #define TIMER_CR | ( | n | ) | (*(vuint16*)(0x04000102+((n)<<2))) |
Returns a dereferenced pointer to the data register for timer control Register.
Example Usage: TIMER_CR(x) = TIMER_ENABLE | TIMER_DIV_64;
Possible bit defines:
| #define TIMER_DATA | ( | n | ) | (*(vuint16*)(0x04000100+((n)<<2))) |
Returns a dereferenced pointer to the data register for timer number "n".
TIMER_DATA(n) when set will latch that value into the counter. Everytime the counter rolls over TIMER_DATA(0) will return to the latched value. This allows you to control the frequency of the timer using the following formula:
TIMER_DATA(x) = -(0x2000000/(freq * divider));
Example Usage: TIMER_DATA(0) = value; were 0 can be 0 through 3 and value is 16 bits.
| #define TIMER_FREQ | ( | n | ) | (-0x2000000/(n)) |
A macro that calculates TIMER_DATA(n) settings for a given frequency of n.
Use the appropriate macro depending on clock divider:
Clock divider is controlled by TIMER_CR(n)
Example Usage:
TIMER_DATA(0) = TIMER_FREQ(freq_in_hz);
TIMER_CR(0) = TIMER_DIV1 | TIMER_ENABLE;
Max frequency is: 33554432Hz
Min frequency is: 512Hz
| #define TIMER_FREQ_1024 | ( | n | ) | (-(0x2000000>>10)/(n)) |
A macro that calculates TIMER_DATA(n) settings for a given frequency of n.
Use the appropriate macro depending on clock divider:
Clock divider is controlled by TIMER_CR(n)
Example Usage: TIMER_DATA(x) = TIMER_FREQ_1024(freq_in_hz)
Max frequency is: 32768Hz
Min frequency is: 0.5Hz
| #define TIMER_FREQ_256 | ( | n | ) | (-(0x2000000>>8)/(n)) |
A macro that calculates TIMER_DATA(n) settings for a given frequency of n.
Use the appropriate macro depending on clock divider:
Clock divider is controlled by TIMER_CR(n)
Example Usage: TIMER_DATA(x) = TIMER_FREQ_256(freq_in_hz)
Max frequency is: 131072Hz
Min frequency is: 2Hz
| #define TIMER_FREQ_64 | ( | n | ) | (-(0x2000000>>6)/(n)) |
A macro that calculates TIMER_DATA(n) settings for a given frequency of n.
Use the appropriate macro depending on clock divider:
Clock divider is controlled by TIMER_CR(n)
Example Usage: TIMER_DATA(x) = TIMER_FREQ_64(freq_in_hz)
Max frequency is: 524288Hz
Min frequency is: 8Hz
1.6.3
