Jonne Valola / PokittoLib Featured

PokittoLib is the library needed for programming the Pokitto DIY game console (www.pokitto.com)

Dependents:   YATTT sd_map_test cPong SnowDemo ... more

PokittoLib

Library for programming Pokitto hardware

How to Use

  1. Import this library to online compiler (see button "import" on the right hand side
  2. DO NOT import mbed-src anymore, a better version is now included inside PokittoLib
  3. Change My_settings.h according to your project
  4. Start coding!

POKITTO_HW/clock_11u6x.c@30:796f9611d2ac, 2018-01-30 (annotated)

Committer:
Pokitto
Date:
Tue Jan 30 10:41:12 2018 +0000
Revision:
30:796f9611d2ac
Sound enhancements done

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Pokitto 30:796f9611d2ac 1 #include "clock_11u6x.h"
Pokitto 30:796f9611d2ac 2
Pokitto 30:796f9611d2ac 3
Pokitto 30:796f9611d2ac 4 /* Inprecise clock rates for the watchdog oscillator */
Pokitto 30:796f9611d2ac 5 STATIC const uint32_t wdtOSCRate[WDTLFO_OSC_4_60 + 1] = {
Pokitto 30:796f9611d2ac 6 0, /* WDT_OSC_ILLEGAL */
Pokitto 30:796f9611d2ac 7 600000, /* WDT_OSC_0_60 */
Pokitto 30:796f9611d2ac 8 1050000, /* WDT_OSC_1_05 */
Pokitto 30:796f9611d2ac 9 1400000, /* WDT_OSC_1_40 */
Pokitto 30:796f9611d2ac 10 1750000, /* WDT_OSC_1_75 */
Pokitto 30:796f9611d2ac 11 2100000, /* WDT_OSC_2_10 */
Pokitto 30:796f9611d2ac 12 2400000, /* WDT_OSC_2_40 */
Pokitto 30:796f9611d2ac 13 2700000, /* WDT_OSC_2_70 */
Pokitto 30:796f9611d2ac 14 3000000, /* WDT_OSC_3_00 */
Pokitto 30:796f9611d2ac 15 3250000, /* WDT_OSC_3_25 */
Pokitto 30:796f9611d2ac 16 3500000, /* WDT_OSC_3_50 */
Pokitto 30:796f9611d2ac 17 3750000, /* WDT_OSC_3_75 */
Pokitto 30:796f9611d2ac 18 4000000, /* WDT_OSC_4_00 */
Pokitto 30:796f9611d2ac 19 4200000, /* WDT_OSC_4_20 */
Pokitto 30:796f9611d2ac 20 4400000, /* WDT_OSC_4_40 */
Pokitto 30:796f9611d2ac 21 4600000 /* WDT_OSC_4_60 */
Pokitto 30:796f9611d2ac 22 };
Pokitto 30:796f9611d2ac 23
Pokitto 30:796f9611d2ac 24 /* Compute a PLL frequency */
Pokitto 30:796f9611d2ac 25 STATIC uint32_t Chip_Clock_GetPLLFreq(uint32_t PLLReg, uint32_t inputRate)
Pokitto 30:796f9611d2ac 26 {
Pokitto 30:796f9611d2ac 27 uint32_t msel = ((PLLReg & 0x1F) + 1);
Pokitto 30:796f9611d2ac 28
Pokitto 30:796f9611d2ac 29 return inputRate * msel;
Pokitto 30:796f9611d2ac 30 }
Pokitto 30:796f9611d2ac 31
Pokitto 30:796f9611d2ac 32 /* Return System PLL output clock rate */
Pokitto 30:796f9611d2ac 33 uint32_t Chip_Clock_GetSystemPLLOutClockRate(void)
Pokitto 30:796f9611d2ac 34 {
Pokitto 30:796f9611d2ac 35 return Chip_Clock_GetPLLFreq(LPC_SYSCTL->SYSPLLCTRL,
Pokitto 30:796f9611d2ac 36 Chip_Clock_GetSystemPLLInClockRate());
Pokitto 30:796f9611d2ac 37 }
Pokitto 30:796f9611d2ac 38
Pokitto 30:796f9611d2ac 39
Pokitto 30:796f9611d2ac 40 /* Compute a WDT rate */
Pokitto 30:796f9611d2ac 41 STATIC uint32_t Chip_Clock_GetWDTRate(uint32_t reg)
Pokitto 30:796f9611d2ac 42 {
Pokitto 30:796f9611d2ac 43 uint32_t div;
Pokitto 30:796f9611d2ac 44 CHIP_WDTLFO_OSC_T clk;
Pokitto 30:796f9611d2ac 45
Pokitto 30:796f9611d2ac 46 /* Get WDT oscillator settings */
Pokitto 30:796f9611d2ac 47 clk = (CHIP_WDTLFO_OSC_T) ((reg >> 5) & 0xF);
Pokitto 30:796f9611d2ac 48 div = reg & 0x1F;
Pokitto 30:796f9611d2ac 49
Pokitto 30:796f9611d2ac 50 /* Compute clock rate and divided by divde value */
Pokitto 30:796f9611d2ac 51 return wdtOSCRate[clk] / ((div + 1) << 1);
Pokitto 30:796f9611d2ac 52 }
Pokitto 30:796f9611d2ac 53
Pokitto 30:796f9611d2ac 54 /* Return estimated watchdog oscillator rate */
Pokitto 30:796f9611d2ac 55 uint32_t Chip_Clock_GetWDTOSCRate(void)
Pokitto 30:796f9611d2ac 56 {
Pokitto 30:796f9611d2ac 57 return Chip_Clock_GetWDTRate(LPC_SYSCTL->WDTOSCCTRL);
Pokitto 30:796f9611d2ac 58 }
Pokitto 30:796f9611d2ac 59
Pokitto 30:796f9611d2ac 60
Pokitto 30:796f9611d2ac 61 /* Return System PLL input clock rate */
Pokitto 30:796f9611d2ac 62 uint32_t Chip_Clock_GetSystemPLLInClockRate(void)
Pokitto 30:796f9611d2ac 63 {
Pokitto 30:796f9611d2ac 64 uint32_t clkRate;
Pokitto 30:796f9611d2ac 65
Pokitto 30:796f9611d2ac 66 switch ((CHIP_SYSCTL_PLLCLKSRC_T) (LPC_SYSCTL->SYSPLLCLKSEL & 0x3)) {
Pokitto 30:796f9611d2ac 67 case SYSCTL_PLLCLKSRC_IRC:
Pokitto 30:796f9611d2ac 68 clkRate = Chip_Clock_GetIntOscRate();
Pokitto 30:796f9611d2ac 69 break;
Pokitto 30:796f9611d2ac 70
Pokitto 30:796f9611d2ac 71 case SYSCTL_PLLCLKSRC_MAINOSC:
Pokitto 30:796f9611d2ac 72 clkRate = Chip_Clock_GetMainOscRate();
Pokitto 30:796f9611d2ac 73 break;
Pokitto 30:796f9611d2ac 74
Pokitto 30:796f9611d2ac 75 case SYSCTL_PLLCLKSRC_RTC32K:
Pokitto 30:796f9611d2ac 76 clkRate = Chip_Clock_GetRTCOscRate();
Pokitto 30:796f9611d2ac 77 break;
Pokitto 30:796f9611d2ac 78
Pokitto 30:796f9611d2ac 79 default:
Pokitto 30:796f9611d2ac 80 clkRate = 0;
Pokitto 30:796f9611d2ac 81 }
Pokitto 30:796f9611d2ac 82
Pokitto 30:796f9611d2ac 83 return clkRate;
Pokitto 30:796f9611d2ac 84 }
Pokitto 30:796f9611d2ac 85
Pokitto 30:796f9611d2ac 86
Pokitto 30:796f9611d2ac 87 /* Return main clock rate */
Pokitto 30:796f9611d2ac 88 uint32_t Chip_Clock_GetMainClockRate(void)
Pokitto 30:796f9611d2ac 89 {
Pokitto 30:796f9611d2ac 90 uint32_t clkRate = 0;
Pokitto 30:796f9611d2ac 91
Pokitto 30:796f9611d2ac 92 switch ((CHIP_SYSCTL_MAINCLKSRC_T) (LPC_SYSCTL->MAINCLKSEL & 0x3)) {
Pokitto 30:796f9611d2ac 93 case SYSCTL_MAINCLKSRC_IRC:
Pokitto 30:796f9611d2ac 94 clkRate = Chip_Clock_GetIntOscRate();
Pokitto 30:796f9611d2ac 95 break;
Pokitto 30:796f9611d2ac 96
Pokitto 30:796f9611d2ac 97 case SYSCTL_MAINCLKSRC_PLLIN:
Pokitto 30:796f9611d2ac 98 clkRate = Chip_Clock_GetSystemPLLInClockRate();
Pokitto 30:796f9611d2ac 99 break;
Pokitto 30:796f9611d2ac 100
Pokitto 30:796f9611d2ac 101 case SYSCTL_MAINCLKSRC_WDTOSC:
Pokitto 30:796f9611d2ac 102 clkRate = Chip_Clock_GetWDTOSCRate();
Pokitto 30:796f9611d2ac 103 break;
Pokitto 30:796f9611d2ac 104
Pokitto 30:796f9611d2ac 105 case SYSCTL_MAINCLKSRC_PLLOUT:
Pokitto 30:796f9611d2ac 106 clkRate = Chip_Clock_GetSystemPLLOutClockRate();
Pokitto 30:796f9611d2ac 107 break;
Pokitto 30:796f9611d2ac 108 }
Pokitto 30:796f9611d2ac 109
Pokitto 30:796f9611d2ac 110 return clkRate;
Pokitto 30:796f9611d2ac 111 }
Pokitto 30:796f9611d2ac 112
Pokitto 30:796f9611d2ac 113 /* Return system clock rate */
Pokitto 30:796f9611d2ac 114 uint32_t Chip_Clock_GetSystemClockRate(void)
Pokitto 30:796f9611d2ac 115 {
Pokitto 30:796f9611d2ac 116 /* No point in checking for divide by 0 */
Pokitto 30:796f9611d2ac 117 return Chip_Clock_GetMainClockRate() / LPC_SYSCTL->SYSAHBCLKDIV;
Pokitto 30:796f9611d2ac 118 }
Pokitto 30:796f9611d2ac 119
Pokitto 30:796f9611d2ac 120