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31 ******************************************************************************/
32 /*****************************************************************************/
37 * This is the driver for one 16-bit timer counter in the Triple Timer Counter
38 * (TTC) module in the Ps block.
40 * The TTC module provides three independent timer/counter modules that can each
41 * be clocked using either the system clock (pclk) or an externally driven
42 * clock (ext_clk). In addition, each counter can independently prescale its
43 * selected clock input (divided by 2 to 65536). Counters can be set to
44 * decrement or increment.
46 * Each of the counters can be programmed to generate interrupt pulses:
47 * . At a regular, predefined period, that is on a timed interval
48 * . When the counter registers overflow
49 * . When the count matches any one of the three 'match' registers
51 * Therefore, up to six different events can trigger a timer interrupt: three
52 * match interrupts, an overflow interrupt, an interval interrupt and an event
53 * timer interrupt. Note that the overflow interrupt and the interval interrupt
54 * are mutually exclusive.
56 * <b>Initialization & Configuration</b>
58 * An XTtcPs_Config structure is used to configure a driver instance.
59 * Information in the XTtcPs_Config structure is the hardware properties
62 * A driver instance is initialized through
63 * XTtcPs_CfgInitialize(InstancePtr, CfgPtr, EffectiveAddr). Where CfgPtr
64 * is a pointer to the XTtcPs_Config structure, it can be looked up statically
65 * through XTtcPs_LookupConfig(DeviceID), or passed in by the caller. The
66 * EffectiveAddr can be the static base address of the device or virtual
67 * mapped address if address translation is supported.
71 * Interrupt handler is not provided by the driver, as handling of interrupt
72 * is application specific.
75 * The default setting for a timer/counter is:
77 * - Internal clock (pclk) selected
79 * - All Interrupts disabled
80 * - Output waveforms disabled
83 * MODIFICATION HISTORY:
85 * Ver Who Date Changes
86 * ----- ------ -------- -----------------------------------------------------
87 * 1.00a drg/jz 01/20/10 First release..
88 * 2.0 adk 12/10/13 Updated as per the New Tcl API's
89 * 3.0 pkp 12/09/14 Added support for Zynq Ultrascale Mp.Also code
90 * modified for MISRA-C:2012 compliance.
93 ******************************************************************************/
95 #ifndef XTTCPS_H /* prevent circular inclusions */
96 #define XTTCPS_H /* by using protection macros */
102 /***************************** Include Files *********************************/
104 #include "xttcps_hw.h"
107 /************************** Constant Definitions *****************************/
109 /** @name Configuration options
111 * Options for the device. Each of the options is bit field, so more than one
112 * options can be specified.
116 #define XTTCPS_OPTION_EXTERNAL_CLK 0x00000001U /**< External clock source */
117 #define XTTCPS_OPTION_CLK_EDGE_NEG 0x00000002U /**< Clock on trailing edge for
119 #define XTTCPS_OPTION_INTERVAL_MODE 0x00000004U /**< Interval mode */
120 #define XTTCPS_OPTION_DECREMENT 0x00000008U /**< Decrement the counter */
121 #define XTTCPS_OPTION_MATCH_MODE 0x00000010U /**< Match mode */
122 #define XTTCPS_OPTION_WAVE_DISABLE 0x00000020U /**< No waveform output */
123 #define XTTCPS_OPTION_WAVE_POLARITY 0x00000040U /**< Waveform polarity */
126 /**************************** Type Definitions *******************************/
129 * This typedef contains configuration information for the device.
132 u16 DeviceId; /**< Unique ID for device */
133 u32 BaseAddress; /**< Base address for device */
134 u32 InputClockHz; /**< Input clock frequency */
138 * The XTtcPs driver instance data. The user is required to allocate a
139 * variable of this type for each PS timer/counter device in the system. A
140 * pointer to a variable of this type is then passed to various driver API
144 XTtcPs_Config Config; /**< Configuration structure */
145 u32 IsReady; /**< Device is initialized and ready */
149 /***************** Macros (Inline Functions) Definitions *********************/
152 * Internal helper macros
154 #define InstReadReg(InstancePtr, RegOffset) \
155 (Xil_In32(((InstancePtr)->Config.BaseAddress) + (u32)(RegOffset)))
157 #define InstWriteReg(InstancePtr, RegOffset, Data) \
158 (Xil_Out32(((InstancePtr)->Config.BaseAddress) + (u32)(RegOffset), (u32)(Data)))
160 /*****************************************************************************/
163 * This function starts the counter/timer without resetting the counter value.
165 * @param InstancePtr is a pointer to the XTtcPs instance.
169 * @note C-style signature:
170 * void XTtcPs_Start(XTtcPs *InstancePtr)
172 ****************************************************************************/
173 #define XTtcPs_Start(InstancePtr) \
174 InstWriteReg((InstancePtr), XTTCPS_CNT_CNTRL_OFFSET, \
175 (InstReadReg((InstancePtr), XTTCPS_CNT_CNTRL_OFFSET) & \
176 ~XTTCPS_CNT_CNTRL_DIS_MASK))
178 /*****************************************************************************/
181 * This function stops the counter/timer. This macro may be called at any time
182 * to stop the counter. The counter holds the last value until it is reset,
183 * restarted or enabled.
185 * @param InstancePtr is a pointer to the XTtcPs instance.
189 * @note C-style signature:
190 * void XTtcPs_Stop(XTtcPs *InstancePtr)
192 ****************************************************************************/
193 #define XTtcPs_Stop(InstancePtr) \
194 InstWriteReg((InstancePtr), XTTCPS_CNT_CNTRL_OFFSET, \
195 (InstReadReg((InstancePtr), XTTCPS_CNT_CNTRL_OFFSET) | \
196 XTTCPS_CNT_CNTRL_DIS_MASK))
198 /*****************************************************************************/
201 * This function checks whether the timer counter has already started.
203 * @param InstancePtr is a pointer to the XTtcPs instance
205 * @return Non-zero if the device has started, '0' otherwise.
207 * @note C-style signature:
208 * int XTtcPs_IsStarted(XTtcPs *InstancePtr)
210 ****************************************************************************/
211 #define XTtcPs_IsStarted(InstancePtr) \
212 ((InstReadReg((InstancePtr), XTTCPS_CNT_CNTRL_OFFSET) & \
213 XTTCPS_CNT_CNTRL_DIS_MASK) == 0U)
215 /*****************************************************************************/
218 * This function returns the current 16-bit counter value. It may be called at
221 * @param InstancePtr is a pointer to the XTtcPs instance.
223 * @return 16-bit counter value.
225 * @note C-style signature:
226 * u16 XTtcPs_GetCounterValue(XTtcPs *InstancePtr)
228 ****************************************************************************/
229 #define XTtcPs_GetCounterValue(InstancePtr) \
230 (u16)InstReadReg((InstancePtr), XTTCPS_COUNT_VALUE_OFFSET)
232 /*****************************************************************************/
235 * This function sets the interval value to be used in interval mode.
237 * @param InstancePtr is a pointer to the XTtcPs instance.
238 * @param Value is the 16-bit value to be set in the interval register.
242 * @note C-style signature:
243 * void XTtcPs_SetInterval(XTtcPs *InstancePtr, u16 Value)
245 ****************************************************************************/
246 #define XTtcPs_SetInterval(InstancePtr, Value) \
247 InstWriteReg((InstancePtr), XTTCPS_INTERVAL_VAL_OFFSET, (Value))
249 /*****************************************************************************/
252 * This function gets the interval value from the interval register.
254 * @param InstancePtr is a pointer to the XTtcPs instance.
256 * @return 16-bit interval value
258 * @note C-style signature:
259 * u16 XTtcPs_GetInterval(XTtcPs *InstancePtr)
261 ****************************************************************************/
262 #define XTtcPs_GetInterval(InstancePtr) \
263 (u16)InstReadReg((InstancePtr), XTTCPS_INTERVAL_VAL_OFFSET)
265 /*****************************************************************************/
268 * This macro resets the count register. It may be called at any time. The
269 * counter is reset to either 0 or 0xFFFF, or the interval value, depending on
270 * the increment/decrement mode. The state of the counter, as started or
271 * stopped, is not affected by calling reset.
273 * @param InstancePtr is a pointer to the XTtcPs instance.
277 * @note C-style signature:
278 * void XTtcPs_ResetCounterValue(XTtcPs *InstancePtr)
280 ****************************************************************************/
281 #define XTtcPs_ResetCounterValue(InstancePtr) \
282 InstWriteReg((InstancePtr), XTTCPS_CNT_CNTRL_OFFSET, \
283 (InstReadReg((InstancePtr), XTTCPS_CNT_CNTRL_OFFSET) | \
284 (u32)XTTCPS_CNT_CNTRL_RST_MASK))
286 /*****************************************************************************/
289 * This function enables the interrupts.
291 * @param InstancePtr is a pointer to the XTtcPs instance.
292 * @param InterruptMask defines which interrupt should be enabled.
293 * Constants are defined in xttcps_hw.h as XTTCPS_IXR_*.
294 * This is a bit mask, all set bits will be enabled, cleared bits
295 * will not be disabled.
301 * void XTtcPs_EnableInterrupts(XTtcPs *InstancePtr, u32 InterruptMask)
303 ******************************************************************************/
304 #define XTtcPs_EnableInterrupts(InstancePtr, InterruptMask) \
305 InstWriteReg((InstancePtr), XTTCPS_IER_OFFSET, \
306 (InstReadReg((InstancePtr), XTTCPS_IER_OFFSET) | \
309 /*****************************************************************************/
312 * This function disables the interrupts.
314 * @param InstancePtr is a pointer to the XTtcPs instance.
315 * @param InterruptMask defines which interrupt should be disabled.
316 * Constants are defined in xttcps_hw.h as XTTCPS_IXR_*.
317 * This is a bit mask, all set bits will be disabled, cleared bits
318 * will not be disabled.
324 * void XTtcPs_DisableInterrupts(XTtcPs *InstancePtr, u32 InterruptMask)
326 ******************************************************************************/
327 #define XTtcPs_DisableInterrupts(InstancePtr, InterruptMask) \
328 InstWriteReg((InstancePtr), XTTCPS_IER_OFFSET, \
329 (InstReadReg((InstancePtr), XTTCPS_IER_OFFSET) & \
332 /*****************************************************************************/
335 * This function reads the interrupt status.
337 * @param InstancePtr is a pointer to the XTtcPs instance.
341 * @note C-style signature:
342 * u32 XTtcPs_GetInterruptStatus(XTtcPs *InstancePtr)
344 ******************************************************************************/
345 #define XTtcPs_GetInterruptStatus(InstancePtr) \
346 InstReadReg((InstancePtr), XTTCPS_ISR_OFFSET)
348 /*****************************************************************************/
351 * This function clears the interrupt status.
353 * @param InstancePtr is a pointer to the XTtcPs instance.
354 * @param InterruptMask defines which interrupt should be cleared.
355 * Constants are defined in xttcps_hw.h as XTTCPS_IXR_*.
356 * This is a bit mask, all set bits will be cleared, cleared bits
357 * will not be cleared.
363 * void XTtcPs_ClearInterruptStatus(XTtcPs *InstancePtr, u32 InterruptMask)
365 ******************************************************************************/
366 #define XTtcPs_ClearInterruptStatus(InstancePtr, InterruptMask) \
367 InstWriteReg((InstancePtr), XTTCPS_ISR_OFFSET, \
371 /************************** Function Prototypes ******************************/
374 * Initialization functions in xttcps_sinit.c
376 XTtcPs_Config *XTtcPs_LookupConfig(u16 DeviceId);
379 * Required functions, in xttcps.c
381 s32 XTtcPs_CfgInitialize(XTtcPs *InstancePtr,
382 XTtcPs_Config * ConfigPtr, u32 EffectiveAddr);
384 void XTtcPs_SetMatchValue(XTtcPs *InstancePtr, u8 MatchIndex, u16 Value);
385 u16 XTtcPs_GetMatchValue(XTtcPs *InstancePtr, u8 MatchIndex);
387 void XTtcPs_SetPrescaler(XTtcPs *InstancePtr, u8 PrescalerValue);
388 u8 XTtcPs_GetPrescaler(XTtcPs *InstancePtr);
390 void XTtcPs_CalcIntervalFromFreq(XTtcPs *InstancePtr, u32 Freq,
391 u16 *Interval, u8 *Prescaler);
394 * Functions for options, in file xttcps_options.c
396 s32 XTtcPs_SetOptions(XTtcPs *InstancePtr, u32 Options);
397 u32 XTtcPs_GetOptions(XTtcPs *InstancePtr);
400 * Function for self-test, in file xttcps_selftest.c
402 s32 XTtcPs_SelfTest(XTtcPs *InstancePtr);
408 #endif /* end of protection macro */