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Fix KL25Z clock definitions in board.h

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This commit is contained in:
Gregory Nutt
2013-04-24 18:29:26 -06:00
parent 7fe5a2b78d
commit 2e04ad2608
7 changed files with 69 additions and 59 deletions
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ChangeLog
+4
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@@ -4611,3 +4611,7 @@
conditional compilation. From Ken Pettit (2014-4-24). conditional compilation. From Ken Pettit (2014-4-24).
* arch/*/src/common/up_initialize.c: Same change required to other * arch/*/src/common/up_initialize.c: Same change required to other
architectures (2014-4-24). architectures (2014-4-24).
* arch/arm/src/kl/kl_clockconfig.c and configs/freedom-kl25z/include/board.h:
Modify out PLL configuration so that it uses the values in
board.h; Fix PLL settings in board.h so that the correct core
and bus clock frequencies are generated. (2014-4-24).
arch/arm/src/kl/chip/kl_mcg.h
+1 -1
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@@ -134,7 +134,7 @@
#define MCG_C5_PRDIV_SHIFT (0) /* Bits 0-4: PLL External Reference Divider */ #define MCG_C5_PRDIV_SHIFT (0) /* Bits 0-4: PLL External Reference Divider */
#define MCG_C5_PRDIV_MASK (31 << MCG_C5_PRDIV_SHIFT) #define MCG_C5_PRDIV_MASK (31 << MCG_C5_PRDIV_SHIFT)
# define MCG_C5_PRDIV(n) (n << MCG_C5_PRDIV_SHIFT) /* Divide factor n=1..25 */ # define MCG_C5_PRDIV(n) (((n)-1) << MCG_C5_PRDIV_SHIFT) /* Divide factor n=1..25 */
#define MCG_C5_PLLSTEN (1 << 5) /* Bit 5: PLL Stop Enable */ #define MCG_C5_PLLSTEN (1 << 5) /* Bit 5: PLL Stop Enable */
#define MCG_C5_PLLCLKEN (1 << 6) /* Bit 6: PLL Clock Enable */ #define MCG_C5_PLLCLKEN (1 << 6) /* Bit 6: PLL Clock Enable */
/* Bit 7: Reserved */ /* Bit 7: Reserved */
arch/arm/src/kl/chip/kl_sim.h
+2 -2
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@@ -383,7 +383,7 @@
/* Bits 0-15: Reserved */ /* Bits 0-15: Reserved */
#define SIM_CLKDIV1_OUTDIV4_SHIFT (16) /* Bits 16-19: Clock 4 output divider value */ #define SIM_CLKDIV1_OUTDIV4_SHIFT (16) /* Bits 16-19: Clock 4 output divider value */
#define SIM_CLKDIV1_OUTDIV4_MASK (15 << SIM_CLKDIV1_OUTDIV4_SHIFT) #define SIM_CLKDIV1_OUTDIV4_MASK (15 << SIM_CLKDIV1_OUTDIV4_SHIFT)
# define SIM_CLKDIV1_OUTDIV4(n) ((n) << SIM_CLKDIV1_OUTDIV4_SHIFT) /* Divide by n, n=1..16 */ # define SIM_CLKDIV1_OUTDIV4(n) (((n)-1) << SIM_CLKDIV1_OUTDIV4_SHIFT) /* Divide by n, n=1..16 */
# define SIM_CLKDIV1_OUTDIV4_1 (0 << SIM_CLKDIV1_OUTDIV4_SHIFT) /* Divide by 1 */ # define SIM_CLKDIV1_OUTDIV4_1 (0 << SIM_CLKDIV1_OUTDIV4_SHIFT) /* Divide by 1 */
# define SIM_CLKDIV1_OUTDIV4_2 (1 << SIM_CLKDIV1_OUTDIV4_SHIFT) /* Divide by 2 */ # define SIM_CLKDIV1_OUTDIV4_2 (1 << SIM_CLKDIV1_OUTDIV4_SHIFT) /* Divide by 2 */
# define SIM_CLKDIV1_OUTDIV4_3 (2 << SIM_CLKDIV1_OUTDIV4_SHIFT) /* Divide by 3 */ # define SIM_CLKDIV1_OUTDIV4_3 (2 << SIM_CLKDIV1_OUTDIV4_SHIFT) /* Divide by 3 */
@@ -440,7 +440,7 @@
# define SIM_CLKDIV1_OUTDIV2_16 (15 << SIM_CLKDIV1_OUTDIV2_SHIFT) /* Divide by 16 */ # define SIM_CLKDIV1_OUTDIV2_16 (15 << SIM_CLKDIV1_OUTDIV2_SHIFT) /* Divide by 16 */
#define SIM_CLKDIV1_OUTDIV1_SHIFT (28) /* Bits 28-31: Clock 1 output divider value */ #define SIM_CLKDIV1_OUTDIV1_SHIFT (28) /* Bits 28-31: Clock 1 output divider value */
#define SIM_CLKDIV1_OUTDIV1_MASK (15 << SIM_CLKDIV1_OUTDIV1_SHIFT) #define SIM_CLKDIV1_OUTDIV1_MASK (15 << SIM_CLKDIV1_OUTDIV1_SHIFT)
# define SIM_CLKDIV1_OUTDIV1(n) ((n) << SIM_CLKDIV1_OUTDIV1_SHIFT) /* Divide by n, n=1..16 */ # define SIM_CLKDIV1_OUTDIV1(n) (((n)-1) << SIM_CLKDIV1_OUTDIV1_SHIFT) /* Divide by n, n=1..16 */
# define SIM_CLKDIV1_OUTDIV1_1 (0 << SIM_CLKDIV1_OUTDIV1_SHIFT) /* Divide by 1 */ # define SIM_CLKDIV1_OUTDIV1_1 (0 << SIM_CLKDIV1_OUTDIV1_SHIFT) /* Divide by 1 */
# define SIM_CLKDIV1_OUTDIV1_2 (1 << SIM_CLKDIV1_OUTDIV1_SHIFT) /* Divide by 2 */ # define SIM_CLKDIV1_OUTDIV1_2 (1 << SIM_CLKDIV1_OUTDIV1_SHIFT) /* Divide by 2 */
# define SIM_CLKDIV1_OUTDIV1_3 (2 << SIM_CLKDIV1_OUTDIV1_SHIFT) /* Divide by 3 */ # define SIM_CLKDIV1_OUTDIV1_3 (2 << SIM_CLKDIV1_OUTDIV1_SHIFT) /* Divide by 3 */
arch/arm/src/kl/kl_clockconfig.c
+15 -9
View File
@@ -106,9 +106,11 @@ void kl_pllconfig(void)
regval32 |= SIM_SCGC5_PORTA; regval32 |= SIM_SCGC5_PORTA;
putreg32(regval32, KL_SIM_SCGC5); putreg32(regval32, KL_SIM_SCGC5);
/* Divide-by-2 for clock 1 and clock 4 (OUTDIV1=1, OUTDIV4=1) */ /* Divide-by-2 for clock 1 and clock 4. OUTDIV1 and OUTDIV4 determined by
* settings in the board.h header file.
*/
regval32 = (SIM_CLKDIV1_OUTDIV1(1) | SIM_CLKDIV1_OUTDIV4(1)); regval32 = (SIM_CLKDIV1_OUTDIV1(BOARD_OUTDIV1) | SIM_CLKDIV1_OUTDIV4(BOARD_OUTDIV4));
putreg32(regval32, KL_SIM_CLKDIV1); putreg32(regval32, KL_SIM_CLKDIV1);
/* System oscillator drives 32 kHz clock for various peripherals (OSC32KSEL=0) */ /* System oscillator drives 32 kHz clock for various peripherals (OSC32KSEL=0) */
@@ -133,11 +135,11 @@ void kl_pllconfig(void)
regval32 = getreg32(KL_PORTA_PCR18); regval32 = getreg32(KL_PORTA_PCR18);
regval32 &= ~(PORT_PCR_ISF | PORT_PCR_MUX_ALT7); regval32 &= ~(PORT_PCR_ISF | PORT_PCR_MUX_ALT7);
putreg32(regval32, KL_PORTA_PCR18); putreg32(regval32, KL_PORTA_PCR18);
regval32 = getreg32(KL_PORTA_PCR19); regval32 = getreg32(KL_PORTA_PCR19);
regval32 &= ~(PORT_PCR_ISF | PORT_PCR_MUX_ALT7); regval32 &= ~(PORT_PCR_ISF | PORT_PCR_MUX_ALT7);
putreg32(regval32, KL_PORTA_PCR19); putreg32(regval32, KL_PORTA_PCR19);
/* Switch to FBE Mode */ /* Switch to FBE Mode */
/* OSC0_CR: ERCLKEN=0, ??=0, EREFSTEN=0, ??=0, SC2P=0, SC4P=0, SC8P=0, SC16P=0 */ /* OSC0_CR: ERCLKEN=0, ??=0, EREFSTEN=0, ??=0, SC2P=0, SC4P=0, SC8P=0, SC16P=0 */
@@ -160,15 +162,19 @@ void kl_pllconfig(void)
regval8 &= ~(MCG_C4_DMX32 | MCG_C4_DRST_DRS_MASK); regval8 &= ~(MCG_C4_DMX32 | MCG_C4_DRST_DRS_MASK);
putreg8(regval8, KL_MCG_C4); putreg8(regval8, KL_MCG_C4);
/* MCG_C5: ??=0, PLLCLKEN0=0, PLLSTEN0=0, PRDIV0=1 */ /* MCG_C5: ??=0, PLLCLKEN0=0, PLLSTEN0=0, PRDIV0 determined by board
* settings in the board.h header file.
*/
regval8 = MCG_C5_PRDIV(1); regval8 = MCG_C5_PRDIV(BOARD_PRDIV0);
putreg8(regval8, KL_MCG_C5); putreg8(regval8, KL_MCG_C5);
/* MCG_C6: LOLIE0=0, PLLS=0, CME0=0, VDIV0=0 */ /* MCG_C6: LOLIE0=0, PLLS=0, CME0=0, VDIV0 determined by board
* settings in the board.h header file.
*/
putreg8(MCG_C6_VDIV(BOARD_VDIV0), KL_MCG_C6);
putreg8(0, KL_MCG_C6);
/* Check that the source of the FLL reference clock is the external /* Check that the source of the FLL reference clock is the external
* reference clock. * reference clock.
*/ */
arch/arm/src/kl/kl_lowputc.c
+12 -17
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@@ -59,28 +59,23 @@
/************************************************************************** /**************************************************************************
* Private Definitions * Private Definitions
**************************************************************************/ **************************************************************************/
#warning "Revisit"
#undef BOARD_CORECLK_FREQ
#define BOARD_CORECLK_FREQ 48000000
/* Select UART parameters for the selected console */ /* Select UART parameters for the selected console */
#if defined(CONFIG_UART0_SERIAL_CONSOLE) #if defined(CONFIG_UART0_SERIAL_CONSOLE)
# define CONSOLE_BASE KL_UART0_BASE # define CONSOLE_BASE KL_UART0_BASE
# define CONSOLE_FREQ 48000000 # define CONSOLE_FREQ BOARD_CORECLK_FREQ
# define CONSOLE_BAUD CONFIG_UART0_BAUD # define CONSOLE_BAUD CONFIG_UART0_BAUD
# define CONSOLE_BITS CONFIG_UART0_BITS # define CONSOLE_BITS CONFIG_UART0_BITS
# define CONSOLE_PARITY CONFIG_UART0_PARITY # define CONSOLE_PARITY CONFIG_UART0_PARITY
#elif defined(CONFIG_UART1_SERIAL_CONSOLE) #elif defined(CONFIG_UART1_SERIAL_CONSOLE)
# define CONSOLE_BASE KL_UART1_BASE # define CONSOLE_BASE KL_UART1_BASE
# define CONSOLE_FREQ 48000000 # define CONSOLE_FREQ BOARD_BUSCLK_FREQ
# define CONSOLE_BAUD CONFIG_UART1_BAUD # define CONSOLE_BAUD CONFIG_UART1_BAUD
# define CONSOLE_BITS CONFIG_UART1_BITS # define CONSOLE_BITS CONFIG_UART1_BITS
# define CONSOLE_PARITY CONFIG_UART1_PARITY # define CONSOLE_PARITY CONFIG_UART1_PARITY
#elif defined(CONFIG_UART2_SERIAL_CONSOLE) #elif defined(CONFIG_UART2_SERIAL_CONSOLE)
# define CONSOLE_BASE KL_UART2_BASE # define CONSOLE_BASE KL_UART2_BASE
# define CONSOLE_FREQ 48000000 # define CONSOLE_FREQ BOARD_BUSCLK_FREQ
# define CONSOLE_BAUD CONFIG_UART2_BAUD # define CONSOLE_BAUD CONFIG_UART2_BAUD
# define CONSOLE_BITS CONFIG_UART2_BITS # define CONSOLE_BITS CONFIG_UART2_BITS
# define CONSOLE_PARITY CONFIG_UART2_PARITY # define CONSOLE_PARITY CONFIG_UART2_PARITY
@@ -113,7 +108,7 @@ static uint8_t g_sizemap[8] = {1, 4, 8, 16, 32, 64, 128, 0};
/************************************************************************** /**************************************************************************
* Private Functions * Private Functions
**************************************************************************/ **************************************************************************/
/************************************************************************** /**************************************************************************
* Public Functions * Public Functions
**************************************************************************/ **************************************************************************/
@@ -314,7 +309,7 @@ void kl_uartconfigure(uintptr_t uart_base, uint32_t baud, uint32_t clock,
{ {
regval |= UART_C1_M; regval |= UART_C1_M;
} }
/* The only other option is 8-bit operation */ /* The only other option is 8-bit operation */
else else
@@ -328,7 +323,7 @@ void kl_uartconfigure(uintptr_t uart_base, uint32_t baud, uint32_t clock,
sbr = clock / (baud << 4); sbr = clock / (baud << 4);
DEBUGASSERT(sbr < 0x2000); DEBUGASSERT(sbr < 0x2000);
/* Save the new baud divisor, retaining other bits in the UARTx_BDH /* Save the new baud divisor, retaining other bits in the UARTx_BDH
* register. * register.
*/ */
@@ -340,7 +335,7 @@ void kl_uartconfigure(uintptr_t uart_base, uint32_t baud, uint32_t clock,
regval = sbr & 0xff; regval = sbr & 0xff;
putreg8(regval, uart_base+KL_UART_BDL_OFFSET); putreg8(regval, uart_base+KL_UART_BDL_OFFSET);
/* Calculate a fractional divider to get closer to the requested baud. /* Calculate a fractional divider to get closer to the requested baud.
* The fractional divider, BRFA, is a 5 bit fractional value that is * The fractional divider, BRFA, is a 5 bit fractional value that is
* logically added to the SBR: * logically added to the SBR:
@@ -353,7 +348,7 @@ void kl_uartconfigure(uintptr_t uart_base, uint32_t baud, uint32_t clock,
tmp = clock - (sbr * (baud << 4)); tmp = clock - (sbr * (baud << 4));
brfa = (tmp << 5) / (baud << 4); brfa = (tmp << 5) / (baud << 4);
/* Set the BRFA field (retaining other bits in the UARTx_C4 register) */ /* Set the BRFA field (retaining other bits in the UARTx_C4 register) */
regval = getreg8(uart_base+KL_UART_C4_OFFSET) & UART_C4_BRFA_MASK; regval = getreg8(uart_base+KL_UART_C4_OFFSET) & UART_C4_BRFA_MASK;
@@ -379,14 +374,14 @@ void kl_uartconfigure(uintptr_t uart_base, uint32_t baud, uint32_t clock,
depth = (3 * depth) >> 2; depth = (3 * depth) >> 2;
} }
putreg8(depth , uart_base+KL_UART_RWFIFO_OFFSET); putreg8(depth , uart_base+KL_UART_RWFIFO_OFFSET);
depth = g_sizemap[(regval & UART_PFIFO_TXFIFOSIZE_MASK) >> UART_PFIFO_TXFIFOSIZE_SHIFT]; depth = g_sizemap[(regval & UART_PFIFO_TXFIFOSIZE_MASK) >> UART_PFIFO_TXFIFOSIZE_SHIFT];
if (depth > 3) if (depth > 3)
{ {
depth = (depth >> 2); depth = (depth >> 2);
} }
putreg8(depth, uart_base+KL_UART_TWFIFO_OFFSET); putreg8(depth, uart_base+KL_UART_TWFIFO_OFFSET);
/* Enable RX and TX FIFOs */ /* Enable RX and TX FIFOs */
putreg8(UART_PFIFO_RXFE | UART_PFIFO_TXFE, uart_base+KL_UART_PFIFO_OFFSET); putreg8(UART_PFIFO_RXFE | UART_PFIFO_TXFE, uart_base+KL_UART_PFIFO_OFFSET);
@@ -398,8 +393,8 @@ void kl_uartconfigure(uintptr_t uart_base, uint32_t baud, uint32_t clock,
* (1 in this case) is less than or equal to 0. * (1 in this case) is less than or equal to 0.
* RWFIFO[RXWATER] = 1: RDRF will be set when the number of queued bytes * RWFIFO[RXWATER] = 1: RDRF will be set when the number of queued bytes
* (1 in this case) is greater than or equal to 1. * (1 in this case) is greater than or equal to 1.
* *
* Set the watermarks to one/zero and disable the FIFOs * Set the watermarks to one/zero and disable the FIFOs
*/ */
putreg8(1, uart_base+KL_UART_RWFIFO_OFFSET); putreg8(1, uart_base+KL_UART_RWFIFO_OFFSET);
arch/arm/src/kl/kl_serial.c
+6 -11
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@@ -69,11 +69,6 @@
* Pre-processor Definitions * Pre-processor Definitions
****************************************************************************/ ****************************************************************************/
/* Some sanity checks *******************************************************/ /* Some sanity checks *******************************************************/
#warning "Revisit"
#undef BOARD_CORECLK_FREQ
#define BOARD_CORECLK_FREQ 48000000
/* Is there at least one UART enabled and configured as a RS-232 device? */ /* Is there at least one UART enabled and configured as a RS-232 device? */
#ifndef HAVE_UART_DEVICE #ifndef HAVE_UART_DEVICE
@@ -359,7 +354,7 @@ static uart_dev_t g_uart0port =
static struct up_dev_s g_uart1priv = static struct up_dev_s g_uart1priv =
{ {
.uartbase = KL_UART1_BASE, .uartbase = KL_UART1_BASE,
.clock = BOARD_CORECLK_FREQ, .clock = BOARD_BUSCLK_FREQ,
.baud = CONFIG_UART1_BAUD, .baud = CONFIG_UART1_BAUD,
#ifdef CONFIG_DEBUG #ifdef CONFIG_DEBUG
.irqe = KL_IRQ_UART1E, .irqe = KL_IRQ_UART1E,
@@ -393,7 +388,7 @@ static uart_dev_t g_uart1port =
static struct up_dev_s g_uart2priv = static struct up_dev_s g_uart2priv =
{ {
.uartbase = KL_UART2_BASE, .uartbase = KL_UART2_BASE,
.clock = BOARD_BUS_FREQ, .clock = BOARD_BUSCLK_FREQ,
.baud = CONFIG_UART2_BAUD, .baud = CONFIG_UART2_BAUD,
#ifdef CONFIG_DEBUG #ifdef CONFIG_DEBUG
.irqe = KL_IRQ_UART2E, .irqe = KL_IRQ_UART2E,
@@ -427,7 +422,7 @@ static uart_dev_t g_uart2port =
static struct up_dev_s g_uart3priv = static struct up_dev_s g_uart3priv =
{ {
.uartbase = KL_UART3_BASE, .uartbase = KL_UART3_BASE,
.clock = BOARD_BUS_FREQ, .clock = BOARD_BUSCLK_FREQ,
.baud = CONFIG_UART3_BAUD, .baud = CONFIG_UART3_BAUD,
#ifdef CONFIG_DEBUG #ifdef CONFIG_DEBUG
.irqe = KL_IRQ_UART3E, .irqe = KL_IRQ_UART3E,
@@ -461,7 +456,7 @@ static uart_dev_t g_uart3port =
static struct up_dev_s g_uart4priv = static struct up_dev_s g_uart4priv =
{ {
.uartbase = KL_UART4_BASE, .uartbase = KL_UART4_BASE,
.clock = BOARD_BUS_FREQ, .clock = BOARD_BUSCLK_FREQ,
.baud = CONFIG_UART4_BAUD, .baud = CONFIG_UART4_BAUD,
#ifdef CONFIG_DEBUG #ifdef CONFIG_DEBUG
.irqe = KL_IRQ_UART4E, .irqe = KL_IRQ_UART4E,
@@ -495,7 +490,7 @@ static uart_dev_t g_uart4port =
static struct up_dev_s g_uart5priv = static struct up_dev_s g_uart5priv =
{ {
.uartbase = KL_UART5_BASE, .uartbase = KL_UART5_BASE,
.clock = BOARD_BUS_FREQ, .clock = BOARD_BUSCLK_FREQ,
.baud = CONFIG_UART5_BAUD, .baud = CONFIG_UART5_BAUD,
#ifdef CONFIG_DEBUG #ifdef CONFIG_DEBUG
.irqe = KL_IRQ_UART5E, .irqe = KL_IRQ_UART5E,
@@ -709,7 +704,7 @@ static int up_attach(struct uart_dev_s *dev)
static void up_detach(struct uart_dev_s *dev) static void up_detach(struct uart_dev_s *dev)
{ {
struct up_dev_s *priv = (struct up_dev_s*)dev->priv; struct up_dev_s *priv = (struct up_dev_s*)dev->priv;
/* Disable interrupts */ /* Disable interrupts */
up_restoreuartint(priv, 0); up_restoreuartint(priv, 0);
configs/freedom-kl25z/include/board.h
+29 -19
View File
@@ -57,32 +57,42 @@
#define BOARD_XTAL_FREQ 8000000 /* 8MHz crystal frequency (REFCLK) */ #define BOARD_XTAL_FREQ 8000000 /* 8MHz crystal frequency (REFCLK) */
#define BOARD_XTAL32_FREQ 32768 /* 32KHz RTC Oscillator */ #define BOARD_XTAL32_FREQ 32768 /* 32KHz RTC Oscillator */
/* PLL Configuration. NOTE: Only even frequency crystals are supported that will /* PLL Configuration.
* produce a 2MHz reference clock to the PLL.
* *
* PLL Input frequency: PLLIN = REFCLK/PRDIV = 4MHz/2 = 2MHz * PLL Input frequency: PLLIN = REFCLK / PRDIV0 = 8MHz / 2 = 4MHz
* PLL Output frequency: PLLOUT = PLLIN*VDIV = 2Mhz*48 = 96MHz * PLL Output frequency: PLLOUT = PLLIN * VDIV0 = 4Mhz * 24 = 96MHz
* MCG Frequency: PLLOUT = 96MHz * MCGPLLCLK Frequency: MCGPLLCLK = 96MHz
*/ */
#define BOARD_PRDIV 2 /* PLL External Reference Divider */ #define BOARD_PRDIV0 2 /* PLL External Reference Divider */
#define BOARD_VDIV 48 /* PLL VCO Divider (frequency multiplier) */ #define BOARD_VDIV0 24 /* PLL VCO Divider (frequency multiplier) */
#define BOARD_PLLIN_FREQ (BOARD_XTAL_FREQ / BOARD_PRDIV) #define BOARD_PLLIN_FREQ (BOARD_XTAL_FREQ / BOARD_PRDIV0)
#define BOARD_PLLOUT_FREQ (BOARD_PLLIN_FREQ * BOARD_VDIV) #define BOARD_PLLOUT_FREQ (BOARD_PLLIN_FREQ * BOARD_VDIV0)
#define BOARD_MCG_FREQ BOARD_PLLOUT_FREQ #define BOARD_MCGPLLCLK_FREQ BOARD_PLLOUT_FREQ
/* SIM CLKDIV1 dividers */ /* MCGOUTCLK: MCG output of either IRC, MCGFLLCLK, MCGPLLCLK, or MCG's external
* reference clock that sources the core, system, bus, and flash clock.
*
* MCGOUTCLK = MCGPLLCLK = 96MHz
*/
#define BOARD_OUTDIV1 1 /* Core = MCG, 96MHz */ #define BOARD_MCGOUTCLK_FREQ BOARD_MCGPLLCLK_FREQ
#define BOARD_OUTDIV2 2 /* Bus = MCG/2, 48MHz */
#define BOARD_OUTDIV3 2 /* FlexBus = MCG/2, 48MHz */
#define BOARD_OUTDIV4 4 /* Flash clock = MCG/4, 24MHz */
#define BOARD_CORECLK_FREQ (BOARD_MCG_FREQ / BOARD_OUTDIV1) /* SIM CLKDIV1 dividers.
#define BOARD_BUS_FREQ (BOARD_MCG_FREQ / BOARD_OUTDIV2) *
#define BOARD_FLEXBUS_FREQ (BOARD_MCG_FREQ / BOARD_OUTDIV3) * Core/system clock
#define BOARD_FLASHCLK_FREQ (BOARD_MCG_FREQ / BOARD_OUTDIV4) * MCGOUTCLK divided by OUTDIV1, clocks the ARM Cortex-M0+ core
*
* Bus clock
* System clock divided by OUTDIV4, clocks the bus slaves and peripherals.
*/
#define BOARD_OUTDIV1 2 /* Core/system = MCGOUTCLK / 2, 48MHz */
#define BOARD_OUTDIV4 2 /* Bus clock = System clock / 2, 24MHz */
#define BOARD_CORECLK_FREQ (BOARD_MCGOUTCLK_FREQ / BOARD_OUTDIV1)
#define BOARD_BUSCLK_FREQ (BOARD_CORECLK_FREQ / BOARD_OUTDIV4)
/* SDHC clocking ********************************************************************/ /* SDHC clocking ********************************************************************/