Uses Timer 0 of the 11U24 to capture input pulsesl
capturet0_11u24.h@0:22c6b94e7da6, 2014-03-13 (annotated)
- Committer:
- hexley
- Date:
- Thu Mar 13 17:52:43 2014 +0000
- Revision:
- 0:22c6b94e7da6
Initial version
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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hexley | 0:22c6b94e7da6 | 1 | /* mbed Library - CaptureT0_11U24 |
hexley | 0:22c6b94e7da6 | 2 | * Copyright (c) 2014 |
hexley | 0:22c6b94e7da6 | 3 | * released under MIT license http://mbed.org/licence/mit |
hexley | 0:22c6b94e7da6 | 4 | */ |
hexley | 0:22c6b94e7da6 | 5 | |
hexley | 0:22c6b94e7da6 | 6 | /***********************************************************************//** |
hexley | 0:22c6b94e7da6 | 7 | * @file capturet1_11u24.h |
hexley | 0:22c6b94e7da6 | 8 | * @brief Header file for the CaptureT0_11U24 library. |
hexley | 0:22c6b94e7da6 | 9 | * @version 0.0 |
hexley | 0:22c6b94e7da6 | 10 | * @date 5 Feb 2014 |
hexley | 0:22c6b94e7da6 | 11 | * @author |
hexley | 0:22c6b94e7da6 | 12 | **************************************************************************/ |
hexley | 0:22c6b94e7da6 | 13 | /*************************************************************************** |
hexley | 0:22c6b94e7da6 | 14 | * Revision Date Comments |
hexley | 0:22c6b94e7da6 | 15 | *---------- -------- ----------------------------------------------- |
hexley | 0:22c6b94e7da6 | 16 | * |
hexley | 0:22c6b94e7da6 | 17 | * 0.0 2/5/14 Initial creation |
hexley | 0:22c6b94e7da6 | 18 | ***************************************************************************/ |
hexley | 0:22c6b94e7da6 | 19 | |
hexley | 0:22c6b94e7da6 | 20 | #ifndef CAPTURET0_H |
hexley | 0:22c6b94e7da6 | 21 | #define CAPTURET0_H |
hexley | 0:22c6b94e7da6 | 22 | |
hexley | 0:22c6b94e7da6 | 23 | /* Includes ------------------------------------------------------------------- */ |
hexley | 0:22c6b94e7da6 | 24 | #include "mbed.h" |
hexley | 0:22c6b94e7da6 | 25 | |
hexley | 0:22c6b94e7da6 | 26 | |
hexley | 0:22c6b94e7da6 | 27 | /* Public Types --------------------------------------------------------------- */ |
hexley | 0:22c6b94e7da6 | 28 | |
hexley | 0:22c6b94e7da6 | 29 | |
hexley | 0:22c6b94e7da6 | 30 | /* Public Functions ----------------------------------------------------------- */ |
hexley | 0:22c6b94e7da6 | 31 | /** @defgroup Capture_Public_Functions Capture Public Functions |
hexley | 0:22c6b94e7da6 | 32 | */ |
hexley | 0:22c6b94e7da6 | 33 | class Capture { |
hexley | 0:22c6b94e7da6 | 34 | public: |
hexley | 0:22c6b94e7da6 | 35 | |
hexley | 0:22c6b94e7da6 | 36 | /** Create a Capture object and configure it |
hexley | 0:22c6b94e7da6 | 37 | * |
hexley | 0:22c6b94e7da6 | 38 | * @param none |
hexley | 0:22c6b94e7da6 | 39 | */ |
hexley | 0:22c6b94e7da6 | 40 | Capture(void); |
hexley | 0:22c6b94e7da6 | 41 | |
hexley | 0:22c6b94e7da6 | 42 | /** Start capturing data. Accumulate the specified number of samples. |
hexley | 0:22c6b94e7da6 | 43 | * @param numsamples The number of samples to be accumulated |
hexley | 0:22c6b94e7da6 | 44 | * @return None |
hexley | 0:22c6b94e7da6 | 45 | */ |
hexley | 0:22c6b94e7da6 | 46 | void Start(int numsamples); |
hexley | 0:22c6b94e7da6 | 47 | |
hexley | 0:22c6b94e7da6 | 48 | /** Check to see if a new count is ready. |
hexley | 0:22c6b94e7da6 | 49 | * |
hexley | 0:22c6b94e7da6 | 50 | * @return (int) Status value. Negative means overrun. |
hexley | 0:22c6b94e7da6 | 51 | */ |
hexley | 0:22c6b94e7da6 | 52 | int Ready(void); |
hexley | 0:22c6b94e7da6 | 53 | |
hexley | 0:22c6b94e7da6 | 54 | /** Read (accumlated) sample count. |
hexley | 0:22c6b94e7da6 | 55 | * |
hexley | 0:22c6b94e7da6 | 56 | * @return (unsigned int) Accumulated capture value |
hexley | 0:22c6b94e7da6 | 57 | */ |
hexley | 0:22c6b94e7da6 | 58 | unsigned int Read(void); |
hexley | 0:22c6b94e7da6 | 59 | |
hexley | 0:22c6b94e7da6 | 60 | |
hexley | 0:22c6b94e7da6 | 61 | |
hexley | 0:22c6b94e7da6 | 62 | /* Public Macros -------------------------------------------------------------- */ |
hexley | 0:22c6b94e7da6 | 63 | |
hexley | 0:22c6b94e7da6 | 64 | |
hexley | 0:22c6b94e7da6 | 65 | |
hexley | 0:22c6b94e7da6 | 66 | |
hexley | 0:22c6b94e7da6 | 67 | private: |
hexley | 0:22c6b94e7da6 | 68 | static void _Captureisr(void); |
hexley | 0:22c6b94e7da6 | 69 | void Captureisr(void); |
hexley | 0:22c6b94e7da6 | 70 | static Capture *instance; |
hexley | 0:22c6b94e7da6 | 71 | int flag; |
hexley | 0:22c6b94e7da6 | 72 | int channel; |
hexley | 0:22c6b94e7da6 | 73 | //int capturecount; |
hexley | 0:22c6b94e7da6 | 74 | unsigned int capturedata; |
hexley | 0:22c6b94e7da6 | 75 | int Nsamples; |
hexley | 0:22c6b94e7da6 | 76 | //int Nsamplebits; |
hexley | 0:22c6b94e7da6 | 77 | //int *flagaddresspointer; |
hexley | 0:22c6b94e7da6 | 78 | |
hexley | 0:22c6b94e7da6 | 79 | |
hexley | 0:22c6b94e7da6 | 80 | |
hexley | 0:22c6b94e7da6 | 81 | /* Private Macros ------------------------------------------------------------- */ |
hexley | 0:22c6b94e7da6 | 82 | /* --------------------- BIT DEFINITIONS -------------------------------------- */ |
hexley | 0:22c6b94e7da6 | 83 | /* Timer Capture Register Definitions --------------------- */ |
hexley | 0:22c6b94e7da6 | 84 | |
hexley | 0:22c6b94e7da6 | 85 | /*********************************************************************//** |
hexley | 0:22c6b94e7da6 | 86 | * Macro defines for CT32B0->IR Interrupt tegister |
hexley | 0:22c6b94e7da6 | 87 | **********************************************************************/ |
hexley | 0:22c6b94e7da6 | 88 | #define IR_CR1INT ((uint32_t)(1<<6)) /**< Interrupt flag for capture channel 1 */ |
hexley | 0:22c6b94e7da6 | 89 | |
hexley | 0:22c6b94e7da6 | 90 | /*********************************************************************//** |
hexley | 0:22c6b94e7da6 | 91 | * Macro defines for IOCON->PIO1_29 register bits LPC11U24 |
hexley | 0:22c6b94e7da6 | 92 | **********************************************************************/ |
hexley | 0:22c6b94e7da6 | 93 | #define PIN_PULL_UP 2UL |
hexley | 0:22c6b94e7da6 | 94 | #define PIN_REPEATER 3UL |
hexley | 0:22c6b94e7da6 | 95 | #define PIN_NORESISTOR 0UL |
hexley | 0:22c6b94e7da6 | 96 | #define PIN_PULL_DOWN 1UL |
hexley | 0:22c6b94e7da6 | 97 | |
hexley | 0:22c6b94e7da6 | 98 | /* FUNC bits */ |
hexley | 0:22c6b94e7da6 | 99 | #define CT32B0_CAP1 2UL |
hexley | 0:22c6b94e7da6 | 100 | |
hexley | 0:22c6b94e7da6 | 101 | /* MODE bits */ |
hexley | 0:22c6b94e7da6 | 102 | #define CAP_PULLUP ((uint32_t)(PIN_PULL_UP<<3)) // Pull up on the CT32B0_CAP1 input pin |
hexley | 0:22c6b94e7da6 | 103 | |
hexley | 0:22c6b94e7da6 | 104 | /*********************************************************************//** |
hexley | 0:22c6b94e7da6 | 105 | * Macro defines for SYSCON->SYSAHBCLKDIV register bits LPC11U24 |
hexley | 0:22c6b94e7da6 | 106 | **********************************************************************/ |
hexley | 0:22c6b94e7da6 | 107 | #define CT32B0_CLK_ENABLE ((uint32_t)(1<<9)) /**< CT32B0 clock enable */ |
hexley | 0:22c6b94e7da6 | 108 | |
hexley | 0:22c6b94e7da6 | 109 | /*********************************************************************//** |
hexley | 0:22c6b94e7da6 | 110 | * Macro defines for CT32B0->TCR register bits LPC11U24 |
hexley | 0:22c6b94e7da6 | 111 | **********************************************************************/ |
hexley | 0:22c6b94e7da6 | 112 | #define TCR_CEN 1UL |
hexley | 0:22c6b94e7da6 | 113 | |
hexley | 0:22c6b94e7da6 | 114 | |
hexley | 0:22c6b94e7da6 | 115 | /*********************************************************************//** |
hexley | 0:22c6b94e7da6 | 116 | * Macro defines for CT32B0->CCR register bits LPC11U24 |
hexley | 0:22c6b94e7da6 | 117 | **********************************************************************/ |
hexley | 0:22c6b94e7da6 | 118 | #define CCR_CAP1RE ((uint32_t)(1<<6)) |
hexley | 0:22c6b94e7da6 | 119 | #define CCR_CAP1FE ((uint32_t)(1<<7)) |
hexley | 0:22c6b94e7da6 | 120 | #define CCR_CAP1I ((uint32_t)(1<<8)) |
hexley | 0:22c6b94e7da6 | 121 | |
hexley | 0:22c6b94e7da6 | 122 | /*********************************************************************//** |
hexley | 0:22c6b94e7da6 | 123 | * Macro defines for CT32B0->CTCR register bits LPC11U24 |
hexley | 0:22c6b94e7da6 | 124 | **********************************************************************/ |
hexley | 0:22c6b94e7da6 | 125 | #define CTCR_CTM_TIMER 0UL |
hexley | 0:22c6b94e7da6 | 126 | #define CTCR_ENCC ((uint32_t)(1<<4)) |
hexley | 0:22c6b94e7da6 | 127 | #define CTCR_SEICC_CAP1RE ((uint32_t)(4<<5)) |
hexley | 0:22c6b94e7da6 | 128 | |
hexley | 0:22c6b94e7da6 | 129 | |
hexley | 0:22c6b94e7da6 | 130 | |
hexley | 0:22c6b94e7da6 | 131 | }; // End of Capture class information |
hexley | 0:22c6b94e7da6 | 132 | #endif /* CAPTURE_H */ |
hexley | 0:22c6b94e7da6 | 133 | /* --------------------------------- End Of File ------------------------------ */ |