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
- Import this library to online compiler (see button "import" on the right hand side
- DO NOT import mbed-src anymore, a better version is now included inside PokittoLib
- Change My_settings.h according to your project
- Start coding!
Diff: POKITTO_HW/clock_11u6x.c
- Revision:
- 30:796f9611d2ac
diff -r 9467921dec10 -r 796f9611d2ac POKITTO_HW/clock_11u6x.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/POKITTO_HW/clock_11u6x.c Tue Jan 30 10:41:12 2018 +0000 @@ -0,0 +1,120 @@ +#include "clock_11u6x.h" + + +/* Inprecise clock rates for the watchdog oscillator */ +STATIC const uint32_t wdtOSCRate[WDTLFO_OSC_4_60 + 1] = { + 0, /* WDT_OSC_ILLEGAL */ + 600000, /* WDT_OSC_0_60 */ + 1050000, /* WDT_OSC_1_05 */ + 1400000, /* WDT_OSC_1_40 */ + 1750000, /* WDT_OSC_1_75 */ + 2100000, /* WDT_OSC_2_10 */ + 2400000, /* WDT_OSC_2_40 */ + 2700000, /* WDT_OSC_2_70 */ + 3000000, /* WDT_OSC_3_00 */ + 3250000, /* WDT_OSC_3_25 */ + 3500000, /* WDT_OSC_3_50 */ + 3750000, /* WDT_OSC_3_75 */ + 4000000, /* WDT_OSC_4_00 */ + 4200000, /* WDT_OSC_4_20 */ + 4400000, /* WDT_OSC_4_40 */ + 4600000 /* WDT_OSC_4_60 */ +}; + +/* Compute a PLL frequency */ +STATIC uint32_t Chip_Clock_GetPLLFreq(uint32_t PLLReg, uint32_t inputRate) +{ + uint32_t msel = ((PLLReg & 0x1F) + 1); + + return inputRate * msel; +} + +/* Return System PLL output clock rate */ +uint32_t Chip_Clock_GetSystemPLLOutClockRate(void) +{ + return Chip_Clock_GetPLLFreq(LPC_SYSCTL->SYSPLLCTRL, + Chip_Clock_GetSystemPLLInClockRate()); +} + + +/* Compute a WDT rate */ +STATIC uint32_t Chip_Clock_GetWDTRate(uint32_t reg) +{ + uint32_t div; + CHIP_WDTLFO_OSC_T clk; + + /* Get WDT oscillator settings */ + clk = (CHIP_WDTLFO_OSC_T) ((reg >> 5) & 0xF); + div = reg & 0x1F; + + /* Compute clock rate and divided by divde value */ + return wdtOSCRate[clk] / ((div + 1) << 1); +} + +/* Return estimated watchdog oscillator rate */ +uint32_t Chip_Clock_GetWDTOSCRate(void) +{ + return Chip_Clock_GetWDTRate(LPC_SYSCTL->WDTOSCCTRL); +} + + +/* Return System PLL input clock rate */ +uint32_t Chip_Clock_GetSystemPLLInClockRate(void) +{ + uint32_t clkRate; + + switch ((CHIP_SYSCTL_PLLCLKSRC_T) (LPC_SYSCTL->SYSPLLCLKSEL & 0x3)) { + case SYSCTL_PLLCLKSRC_IRC: + clkRate = Chip_Clock_GetIntOscRate(); + break; + + case SYSCTL_PLLCLKSRC_MAINOSC: + clkRate = Chip_Clock_GetMainOscRate(); + break; + + case SYSCTL_PLLCLKSRC_RTC32K: + clkRate = Chip_Clock_GetRTCOscRate(); + break; + + default: + clkRate = 0; + } + + return clkRate; +} + + +/* Return main clock rate */ +uint32_t Chip_Clock_GetMainClockRate(void) +{ + uint32_t clkRate = 0; + + switch ((CHIP_SYSCTL_MAINCLKSRC_T) (LPC_SYSCTL->MAINCLKSEL & 0x3)) { + case SYSCTL_MAINCLKSRC_IRC: + clkRate = Chip_Clock_GetIntOscRate(); + break; + + case SYSCTL_MAINCLKSRC_PLLIN: + clkRate = Chip_Clock_GetSystemPLLInClockRate(); + break; + + case SYSCTL_MAINCLKSRC_WDTOSC: + clkRate = Chip_Clock_GetWDTOSCRate(); + break; + + case SYSCTL_MAINCLKSRC_PLLOUT: + clkRate = Chip_Clock_GetSystemPLLOutClockRate(); + break; + } + + return clkRate; +} + +/* Return system clock rate */ +uint32_t Chip_Clock_GetSystemClockRate(void) +{ + /* No point in checking for divide by 0 */ + return Chip_Clock_GetMainClockRate() / LPC_SYSCTL->SYSAHBCLKDIV; +} + +