Revision 324
corrected some more things
| timer.c | ||
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#include "timer.h" |
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//#define TIMER_FREQ 1193182 /**< @brief clock frequency for timer in PC and AT */
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//#define TIMER_MIN_FREQ (TIMER_FREQ/UINT16_MAX) + ((TIMER_FREQ % UINT16_MAX) ? 1 : 0) /**< @brief mininum frequency for timer */
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#define TIMER_FREQ 1193182 /**< @brief clock frequency for timer in PC and AT */ |
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#define TIMER_MIN_FREQ (TIMER_FREQ/UINT16_MAX) + ((TIMER_FREQ % UINT16_MAX) ? 1 : 0) /**< @brief mininum frequency for timer */ |
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/* I/O port addresses */ |
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//#define TIMER_0 0x40 /**< @brief Timer 0 count register */
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//#define TIMER_1 0x41 /**< @brief Timer 1 count register */
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//#define TIMER_2 0x42 /**< @brief Timer 2 count register */
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//#define TIMER_CTRL 0x43 /**< @brief Control register */
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#define TIMER_0 0x40 /**< @brief Timer 0 count register */ |
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#define TIMER_1 0x41 /**< @brief Timer 1 count register */ |
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#define TIMER_2 0x42 /**< @brief Timer 2 count register */ |
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#define TIMER_CTRL 0x43 /**< @brief Control register */ |
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//#define SPEAKER_CTRL 0x61 /**< @brief Register for speaker control */
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#define SPEAKER_CTRL 0x61 /**< @brief Register for speaker control */ |
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/* Timer control */ |
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/* Timer selection: bits 7 and 6 */ |
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//#define TIMER_SEL0 0x00 /**< @brief Control Word for Timer 0 */
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//#define TIMER_SEL1 BIT(6) /**< @brief Control Word for Timer 1 */
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//#define TIMER_SEL2 BIT(7) /**< @brief Control Word for Timer 2 */
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//#define TIMER_RB_CMD (BIT(7) | BIT(6)) /**< @brief Read Back Command */
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#define TIMER_SEL0 0x00 /**< @brief Control Word for Timer 0 */ |
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#define TIMER_SEL1 BIT(6) /**< @brief Control Word for Timer 1 */ |
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#define TIMER_SEL2 BIT(7) /**< @brief Control Word for Timer 2 */ |
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#define TIMER_RB_CMD (BIT(7) | BIT(6)) /**< @brief Read Back Command */ |
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/* Register selection: bits 5 and 4 */ |
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//#define TIMER_LSB BIT(4) /**< @brief Initialize Counter LSB only */
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//#define TIMER_MSB BIT(5) /**< @brief Initialize Counter MSB only */
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//#define TIMER_LSB_MSB (TIMER_LSB | TIMER_MSB) /**< @brief Initialize LSB first and MSB afterwards */
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//#define TIMER_INMODE_MASK 0x30 /**< @brief Mask for Timer Counter Mode */
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//#define TIMER_INMODE_POS 4 /**< @brief Bit position of Timer Counter Mode */
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#define TIMER_LSB BIT(4) /**< @brief Initialize Counter LSB only */ |
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#define TIMER_MSB BIT(5) /**< @brief Initialize Counter MSB only */ |
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#define TIMER_LSB_MSB (TIMER_LSB | TIMER_MSB) /**< @brief Initialize LSB first and MSB afterwards */ |
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#define TIMER_INMODE_MASK 0x30 /**< @brief Mask for Timer Counter Mode */ |
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#define TIMER_INMODE_POS 4 /**< @brief Bit position of Timer Counter Mode */ |
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/* Operating mode: bits 3, 2 and 1 */ |
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//#define TIMER_SQR_WAVE (BIT(2) | BIT(1)) /**< @brief Mode 3: square wave generator */
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//#define TIMER_RATE_GEN BIT(2) /**< @brief Mode 2: rate generator */
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//#define TIMER_MODE_MASK 0x0E /**< @brief Mask for mode */
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//#define TIMER_MODE_POS 1 /**< @brief Position of smallest bit from mode */
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//#define TIMER_MODE_2ALT 0x6 /**< @brief Alternative notation for mode 2 */
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//#define TIMER_MODE_3ALT 0x7 /**< @brief Alternative notation for mode 3 */
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//#define TIMER_MODE_RED2 0x03 /**< @brief Reduce 3-bit mode to 2-bit mode */
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#define TIMER_SQR_WAVE (BIT(2) | BIT(1)) /**< @brief Mode 3: square wave generator */ |
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#define TIMER_RATE_GEN BIT(2) /**< @brief Mode 2: rate generator */ |
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#define TIMER_MODE_MASK 0x0E /**< @brief Mask for mode */ |
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#define TIMER_MODE_POS 1 /**< @brief Position of smallest bit from mode */ |
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#define TIMER_MODE_2ALT 0x6 /**< @brief Alternative notation for mode 2 */ |
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#define TIMER_MODE_3ALT 0x7 /**< @brief Alternative notation for mode 3 */ |
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#define TIMER_MODE_RED2 0x03 /**< @brief Reduce 3-bit mode to 2-bit mode */ |
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/* Counting mode: bit 0 */ |
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//#define TIMER_BCD 0x01 /**< @brief Count in BCD */
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//#define TIMER_BIN 0x00 /**< @brief Count in binary */
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#define TIMER_BCD 0x01 /**< @brief Count in BCD */ |
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#define TIMER_BIN 0x00 /**< @brief Count in binary */ |
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/* READ-BACK COMMAND FORMAT */ |
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//#define TIMER_RB_COUNT_ BIT(5) /**< @brief Read counter value on read-back (0 to activate) */
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//#define TIMER_RB_STATUS_ BIT(4) /**< @brief Read status value on read-back (0 to activate) */
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//#define TIMER_RB_SEL(n) BIT((n) + 1) /**< @brief Select timer to read information from */
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#define TIMER_RB_COUNT_ BIT(5) /**< @brief Read counter value on read-back (0 to activate) */ |
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#define TIMER_RB_STATUS_ BIT(4) /**< @brief Read status value on read-back (0 to activate) */ |
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#define TIMER_RB_SEL(n) BIT((n) + 1) /**< @brief Select timer to read information from */ |
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int (subscribe_timer_interrupt)(uint8_t interrupt_bit, int *interrupt_id) {
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if (interrupt_id == NULL) return 1; |
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