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KL82Z: Fix the clock selection for LPUART module 

Signed-off-by: Mahesh Mahadevan <mahesh.mahadevan@nxp.com>
pull/6579/head
Mahesh Mahadevan 2018-03-27 02:23:48 -05:00 committed by adbridge
parent bb59226cd0
commit 957e1ce56e
4 changed files with 22 additions and 15 deletions
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6
targets/TARGET_Freescale/TARGET_MCUXpresso_MCUS/TARGET_KL82Z/TARGET_FRDM/mbed_overrides.c
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@ -39,3 +39,9 @@ void NMI_Handler(void)
gpio_t gpio; gpio_t gpio;
gpio_init_in(&gpio, PTA4); gpio_init_in(&gpio, PTA4);
} }
// Set the UART clock source
void serial_clock_init(void)
{
CLOCK_SetLpuartClock(2U);
}

6
targets/TARGET_Freescale/TARGET_MCUXpresso_MCUS/TARGET_KL82Z/TARGET_USENSE/mbed_overrides.c
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@ -54,3 +54,9 @@ void rtc_setup_oscillator(RTC_Type *base)
RTC->CR |= RTC_CR_OSCE_MASK; RTC->CR |= RTC_CR_OSCE_MASK;
} }
#endif #endif
// Set the UART clock source
void serial_clock_init(void)
{
CLOCK_SetLpuartClock(2U);
}

6
targets/TARGET_Freescale/TARGET_MCUXpresso_MCUS/TARGET_KL82Z/peripheral_clock_defines.h
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@ -33,12 +33,6 @@
#include "fsl_clock.h" #include "fsl_clock.h"
/* Array for LPUART module clocks */
#define LPUART_CLOCK_FREQS \
{ \
kCLOCK_Osc0ErClk, kCLOCK_Osc0ErClk, kCLOCK_Osc0ErClk \
}
/* Array for I2C module clocks */ /* Array for I2C module clocks */
#define I2C_CLOCK_FREQS \ #define I2C_CLOCK_FREQS \
{ \ { \

17
targets/TARGET_Freescale/TARGET_MCUXpresso_MCUS/TARGET_KL82Z/serial_api.c
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@ -34,8 +34,8 @@ static uint32_t serial_irq_ids[FSL_FEATURE_SOC_LPUART_COUNT] = {0};
static uart_irq_handler irq_handler; static uart_irq_handler irq_handler;
/* Array of UART peripheral base address. */ /* Array of UART peripheral base address. */
static LPUART_Type *const uart_addrs[] = LPUART_BASE_PTRS; static LPUART_Type *const uart_addrs[] = LPUART_BASE_PTRS;
/* Array of LPUART bus clock frequencies */ /* LPUART bus clock frequency */
static clock_name_t const uart_clocks[] = LPUART_CLOCK_FREQS; static uint32_t lpuart_src_freq;
int stdio_uart_inited = 0; int stdio_uart_inited = 0;
serial_t stdio_uart; serial_t stdio_uart;
@ -47,10 +47,11 @@ void serial_init(serial_t *obj, PinName tx, PinName rx)
obj->index = pinmap_merge(uart_tx, uart_rx); obj->index = pinmap_merge(uart_tx, uart_rx);
MBED_ASSERT((int)obj->index != NC); MBED_ASSERT((int)obj->index != NC);
/* Set the UART clock source */
serial_clock_init();
// since the LPuart initialization depends very much on the source clock and its // since the LPuart initialization depends very much on the source clock and its
// frequency, we do a check here and retrieve the frequency accordingly // frequency, we do a check here and retrieve the frequency accordingly
// The CLOCK_SetLpuartSrc() is already done during clock init.
uint32_t lpuart_src_freq;
switch (SIM->SOPT2 & SIM_SOPT2_LPUARTSRC_MASK) { switch (SIM->SOPT2 & SIM_SOPT2_LPUARTSRC_MASK) {
case SIM_SOPT2_LPUARTSRC(3U): { case SIM_SOPT2_LPUARTSRC(3U): {
lpuart_src_freq = CLOCK_GetInternalRefClkFreq(); lpuart_src_freq = CLOCK_GetInternalRefClkFreq();
@ -65,9 +66,9 @@ void serial_init(serial_t *obj, PinName tx, PinName rx)
break; break;
} }
default: { default: {
/* Set the LPUART clock source */ /* Set the LPUART clock source */
CLOCK_SetLpuartClock(1U); CLOCK_SetLpuartClock(2U);
lpuart_src_freq = CLOCK_GetFreq(uart_clocks[obj->index]); lpuart_src_freq = CLOCK_GetOsc0ErClkFreq();
break; break;
} }
} }
@ -106,7 +107,7 @@ void serial_free(serial_t *obj)
void serial_baud(serial_t *obj, int baudrate) void serial_baud(serial_t *obj, int baudrate)
{ {
LPUART_SetBaudRate(uart_addrs[obj->index], (uint32_t)baudrate, CLOCK_GetFreq(uart_clocks[obj->index])); LPUART_SetBaudRate(uart_addrs[obj->index], (uint32_t)baudrate, lpuart_src_freq);
} }
void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits) void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits)