Bo-Jhang Ho / Mbed 2 deprecated mbed_nanosec_timer

skeleton

Dependencies:   MAG3110 MMA8451Q SLCD TSI mbed

TPM_init.cpp@0:ba78bf4f69dc, 2014-03-12 (annotated)

Committer:
TimeString
Date:
Wed Mar 12 20:48:17 2014 +0000
Revision:
0:ba78bf4f69dc
to jaeyoung

Who changed what in which revision?

UserRevisionLine numberNew contents of line
TimeString 0:ba78bf4f69dc 1 #include "TPM_init.h"
TimeString 0:ba78bf4f69dc 2
TimeString 0:ba78bf4f69dc 3 void TPM0_init(unsigned int modulo_val, unsigned int prescale_val){
TimeString 0:ba78bf4f69dc 4 volatile unsigned int *ptrMyReg;
TimeString 0:ba78bf4f69dc 5 unsigned int prev;
TimeString 0:ba78bf4f69dc 6
TimeString 0:ba78bf4f69dc 7 //ptrMyReg = (volatile unsigned int *) MCG_C1_ADDR;
TimeString 0:ba78bf4f69dc 8 //pc.printf("MCG_C1 = 0x%x ", *ptrMyReg);
TimeString 0:ba78bf4f69dc 9
TimeString 0:ba78bf4f69dc 10 ptrMyReg = (volatile unsigned int *) SIM_SOPT2_ADDR;
TimeString 0:ba78bf4f69dc 11 prev = *ptrMyReg;
TimeString 0:ba78bf4f69dc 12
TimeString 0:ba78bf4f69dc 13 SIM->SOPT2 |= SIM_SOPT2_PLLFLLSEL_MASK;
TimeString 0:ba78bf4f69dc 14 SIM->SOPT2 &= ~(SIM_SOPT2_TPMSRC_MASK);
TimeString 0:ba78bf4f69dc 15 SIM->SOPT2 |= SIM_SOPT2_TPMSRC(1);
TimeString 0:ba78bf4f69dc 16
TimeString 0:ba78bf4f69dc 17 /*
TimeString 0:ba78bf4f69dc 18 //pc.printf("Previous value of SIM_SOPT2 = 0x%x ", *ptrMyReg);
TimeString 0:ba78bf4f69dc 19 //prev = prev & 0xFDFEFFFF; //16:PLLFLLSEL, 0:MCFGFLLCLK, 1:MCGPLLCLK/2
TimeString 0:ba78bf4f69dc 20 prev = prev & 0xFDFFFFFF; //16:PLLFLLSEL, 0:MCFGFLLCLK, 1:MCGPLLCLK/2
TimeString 0:ba78bf4f69dc 21 //pc.printf("prev after AND MASK = %x", prev);
TimeString 0:ba78bf4f69dc 22 prev = prev | 0x01000000;
TimeString 0:ba78bf4f69dc 23 //pc.printf("prev after AND MASK = %x", prev);
TimeString 0:ba78bf4f69dc 24 *ptrMyReg = prev;
TimeString 0:ba78bf4f69dc 25 //*ptrMyReg = prev | 0x01000000; //25-24: TPMSRC, 01:MCGFLLCLK or MCFGPLLCLK/2
TimeString 0:ba78bf4f69dc 26 //*ptrMyReg = 0x05010000;
TimeString 0:ba78bf4f69dc 27
TimeString 0:ba78bf4f69dc 28 //pc.printf("SIM_SOPT2 = 0x%x\n", *ptrMyReg);
TimeString 0:ba78bf4f69dc 29 */
TimeString 0:ba78bf4f69dc 30
TimeString 0:ba78bf4f69dc 31 SIM->SCGC6 |= SIM_SCGC6_TPM0_MASK;
TimeString 0:ba78bf4f69dc 32
TimeString 0:ba78bf4f69dc 33 /*
TimeString 0:ba78bf4f69dc 34 ptrMyReg = (volatile unsigned int *) SIM_SCGC6_ADDR; //bit [26-24]
TimeString 0:ba78bf4f69dc 35 prev = *ptrMyReg;
TimeString 0:ba78bf4f69dc 36 prev = prev | 0x07000000;
TimeString 0:ba78bf4f69dc 37 *ptrMyReg = prev;
TimeString 0:ba78bf4f69dc 38 //pc.printf("New value of SIM_SCGC6 = 0x%x ", *ptrMyReg);
TimeString 0:ba78bf4f69dc 39 */
TimeString 0:ba78bf4f69dc 40
TimeString 0:ba78bf4f69dc 41 //Set all bits to zero
TimeString 0:ba78bf4f69dc 42 TPM0->SC = 0x0;
TimeString 0:ba78bf4f69dc 43
TimeString 0:ba78bf4f69dc 44 /*
TimeString 0:ba78bf4f69dc 45 ptrMyReg = (volatile unsigned int *) TPM0_SC_ADDR; //all bits set to 0
TimeString 0:ba78bf4f69dc 46 *ptrMyReg = 0x0;
TimeString 0:ba78bf4f69dc 47 //pc.printf("TPM0_SC = 0x%x\n", *ptrMyReg);
TimeString 0:ba78bf4f69dc 48 */
TimeString 0:ba78bf4f69dc 49
TimeString 0:ba78bf4f69dc 50 //No channels for now
TimeString 0:ba78bf4f69dc 51 /*
TimeString 0:ba78bf4f69dc 52 ptrMyReg = (volatile unsigned int *) TPM0_C0SC_ADDR;
TimeString 0:ba78bf4f69dc 53 prev = *ptrMyReg;
TimeString 0:ba78bf4f69dc 54 prev = prev | 0x00000040;
TimeString 0:ba78bf4f69dc 55 *ptrMyReg = prev;
TimeString 0:ba78bf4f69dc 56 //pc.printf("TPM0_C0SC = 0x%x\n", *ptrMyReg);
TimeString 0:ba78bf4f69dc 57 */
TimeString 0:ba78bf4f69dc 58
TimeString 0:ba78bf4f69dc 59 //Reset COUNT value to zero
TimeString 0:ba78bf4f69dc 60 TPM0->CNT = 0x0;
TimeString 0:ba78bf4f69dc 61 /*
TimeString 0:ba78bf4f69dc 62 ptrMyReg = (volatile unsigned int *) TPM0_CNT_ADDR; //all bits set to 0
TimeString 0:ba78bf4f69dc 63 *ptrMyReg = 0x0;
TimeString 0:ba78bf4f69dc 64 //pc.printf("TPM0_CNT = 0x%x\n", *ptrMyReg);
TimeString 0:ba78bf4f69dc 65 */
TimeString 0:ba78bf4f69dc 66
TimeString 0:ba78bf4f69dc 67 //Set modulo value
TimeString 0:ba78bf4f69dc 68 TPM0->MOD = modulo_val;
TimeString 0:ba78bf4f69dc 69 /*
TimeString 0:ba78bf4f69dc 70 ptrMyReg = (volatile unsigned int *) TPM0_MOD_ADDR;
TimeString 0:ba78bf4f69dc 71 *ptrMyReg = modulo_val;
TimeString 0:ba78bf4f69dc 72 //*ptrMyReg = 0xFFFF;
TimeString 0:ba78bf4f69dc 73 //pc.printf("TPM0_MOD = 0x%x\n", *ptrMyReg);
TimeString 0:ba78bf4f69dc 74 */
TimeString 0:ba78bf4f69dc 75
TimeString 0:ba78bf4f69dc 76 //Set prescale value
TimeString 0:ba78bf4f69dc 77 TPM0->SC |= prescale_val;
TimeString 0:ba78bf4f69dc 78
TimeString 0:ba78bf4f69dc 79 //Enable overflow interrupt
TimeString 0:ba78bf4f69dc 80 TPM0->SC |= TPM_SC_TOIE_MASK;
TimeString 0:ba78bf4f69dc 81
TimeString 0:ba78bf4f69dc 82 /*
TimeString 0:ba78bf4f69dc 83 ptrMyReg = (volatile unsigned int *) TPM0_SC_ADDR;
TimeString 0:ba78bf4f69dc 84 *ptrMyReg = 0x00000040; //bit [6]:1, Enable Overflow Interrupts
TimeString 0:ba78bf4f69dc 85 //pc.printf("TPM0_SC = 0x%x\n", *ptrMyReg);
TimeString 0:ba78bf4f69dc 86 */
TimeString 0:ba78bf4f69dc 87
TimeString 0:ba78bf4f69dc 88
TimeString 0:ba78bf4f69dc 89
TimeString 0:ba78bf4f69dc 90
TimeString 0:ba78bf4f69dc 91 //Enable reset after overflow [27:24} Trigger, 1000: TPM0 overflow, [18]:counter reload on trigger
TimeString 0:ba78bf4f69dc 92 /* ptrMyReg = (volatile unsigned int *) TPM0_CONF_ADDR;
TimeString 0:ba78bf4f69dc 93 //prev = *ptrMyReg;
TimeString 0:ba78bf4f69dc 94 //prev = prev | 0x08000000;
TimeString 0:ba78bf4f69dc 95 //pc.printf("TPM0_CONF = 0x%x\n", *ptrMyReg);
TimeString 0:ba78bf4f69dc 96 *ptrMyReg = 0x08040000;
TimeString 0:ba78bf4f69dc 97 */
TimeString 0:ba78bf4f69dc 98
TimeString 0:ba78bf4f69dc 99 }
TimeString 0:ba78bf4f69dc 100
TimeString 0:ba78bf4f69dc 101 unsigned int TPM0_SC_read() {
TimeString 0:ba78bf4f69dc 102 unsigned int SC_value = TPM0->SC;
TimeString 0:ba78bf4f69dc 103 return SC_value;
TimeString 0:ba78bf4f69dc 104 /*
TimeString 0:ba78bf4f69dc 105 volatile unsigned int *ptrMyReg;
TimeString 0:ba78bf4f69dc 106 unsigned int value;
TimeString 0:ba78bf4f69dc 107 ptrMyReg = (volatile unsigned int *) TPM0_SC_ADDR; //all bits set to 0
TimeString 0:ba78bf4f69dc 108 value = *ptrMyReg;
TimeString 0:ba78bf4f69dc 109 return value;
TimeString 0:ba78bf4f69dc 110 */
TimeString 0:ba78bf4f69dc 111 }
TimeString 0:ba78bf4f69dc 112 unsigned int TPM0_CNT_read() {
TimeString 0:ba78bf4f69dc 113 unsigned int CNT_value = TPM0->CNT;
TimeString 0:ba78bf4f69dc 114 return CNT_value;
TimeString 0:ba78bf4f69dc 115 /*
TimeString 0:ba78bf4f69dc 116 volatile unsigned int *ptrMyReg;
TimeString 0:ba78bf4f69dc 117 unsigned int value;
TimeString 0:ba78bf4f69dc 118 ptrMyReg = (volatile unsigned int *) TPM0_CNT_ADDR; //all bits set to 0
TimeString 0:ba78bf4f69dc 119 value = *ptrMyReg;
TimeString 0:ba78bf4f69dc 120 return value;
TimeString 0:ba78bf4f69dc 121 */
TimeString 0:ba78bf4f69dc 122 }
TimeString 0:ba78bf4f69dc 123
TimeString 0:ba78bf4f69dc 124 void TPM0_clear_overflow() {
TimeString 0:ba78bf4f69dc 125 TPM0->SC |= TPM_SC_TOF_MASK;
TimeString 0:ba78bf4f69dc 126 /*
TimeString 0:ba78bf4f69dc 127 volatile unsigned int *ptrMyReg;
TimeString 0:ba78bf4f69dc 128
TimeString 0:ba78bf4f69dc 129 ptrMyReg = (volatile unsigned int *) TPM0_SC_ADDR; //all bits set to 0
TimeString 0:ba78bf4f69dc 130 *ptrMyReg = 0x000000C8; //bit[4:3]: 0x01, on every TPM counter clk
TimeString 0:ba78bf4f69dc 131 //*ptrMyReg = 0x00000088; //Debugging handler. Try disabling overflow interrupts
TimeString 0:ba78bf4f69dc 132 //*ptrMyReg = 0x00000050; //bit[4:3]: 0x10, on every rising edge of external ....
TimeString 0:ba78bf4f69dc 133 */
TimeString 0:ba78bf4f69dc 134 }
TimeString 0:ba78bf4f69dc 135
TimeString 0:ba78bf4f69dc 136 void TPM0_start() {
TimeString 0:ba78bf4f69dc 137
TimeString 0:ba78bf4f69dc 138 TPM0->SC |= TPM_SC_CMOD(1); //Count on every TPM counter clk
TimeString 0:ba78bf4f69dc 139 /*
TimeString 0:ba78bf4f69dc 140 volatile unsigned int *ptrMyReg;
TimeString 0:ba78bf4f69dc 141
TimeString 0:ba78bf4f69dc 142 ptrMyReg = (volatile unsigned int *) TPM0_SC_ADDR; //all bits set to 0
TimeString 0:ba78bf4f69dc 143 *ptrMyReg = 0x00000048; //bit[4:3]: 0x01, on every TPM counter clk
TimeString 0:ba78bf4f69dc 144 */
TimeString 0:ba78bf4f69dc 145 }