/**
****************************************************************************************
* @brief Setup the microcontroller system.
*
* Initialize the system clock and pins.
*****************************************************************************************
*/
void SystemInit(void)
{
/*
**************************
* Sub module clock setting
**************************
*/
syscon_SetIvrefX32WithMask(QN_SYSCON, SYSCON_MASK_DVDD12_SW_EN, MASK_ENABLE);
syscon_set_sysclk_src(CLK_XTAL, __XTAL);
#if __XTAL == XTAL_32MHz
calibration_init(XTAL_32M);
#else
calibration_init(XTAL_16M);
#endif
ref_pll_calibration();
clk32k_enable(__32K_TYPE);
#if QN_32K_RCO
rco_calibration();
#endif
// Reset SPI1 module(since the default register value was changed in bootloader)
syscon_SetCRSS(QN_SYSCON, SYSCON_MASK_USART1_RST);
syscon_SetCRSC(QN_SYSCON, SYSCON_MASK_USART1_RST);
/*
Disable all peripheral clock, will be enabled in the driver initilization.
The next function performs the equivalent effect of a collection of these functions.
timer_clock_off(QN_TIMER0);
timer_clock_off(QN_TIMER1);
timer_clock_off(QN_TIMER2);
timer_clock_off(QN_TIMER3);
uart_clock_off(QN_UART0);
uart_clock_off(QN_UART1);
spi_clock_off(QN_SPI0);
spi_clock_off(QN_SPI1);
flash_clock_off();
gpio_clock_off();
adc_clock_off();
dma_clock_off();
pwm_clock_off();
*/
syscon_SetCRSS(QN_SYSCON, SYSCON_MASK_GATING_TIMER0
| SYSCON_MASK_GATING_TIMER1
| SYSCON_MASK_GATING_TIMER2
| SYSCON_MASK_GATING_TIMER3
| SYSCON_MASK_GATING_UART0
| SYSCON_MASK_GATING_UART1
| SYSCON_MASK_GATING_SPI0
| SYSCON_MASK_GATING_SPI1
| SYSCON_MASK_GATING_SPI_AHB
| SYSCON_MASK_GATING_GPIO
| SYSCON_MASK_GATING_ADC
| SYSCON_MASK_GATING_DMA
| SYSCON_MASK_GATING_PWM);
// calibration changed system clock setting
// Configure sytem clock.
syscon_set_sysclk_src(CLK_XTAL, __XTAL);
syscon_set_ahb_clk(__AHB_CLK);
syscon_set_apb_clk(__APB_CLK);
syscon_set_ble_clk(__BLE_CLK);
syscon_set_timer_clk(__TIMER_CLK);
syscon_set_usart_clk((uint32_t)QN_UART0, __USART_CLK);
syscon_set_usart_clk((uint32_t)QN_UART1, __USART_CLK);
/*
**************************
* IO configuration
**************************
*/
SystemIOCfg();
/*
**************************
* Peripheral setting
**************************
*/
}
/**
****************************************************************************************
* @brief Setup the microcontroller system.
*
* Initialize the system clock and pins.
*****************************************************************************************
*/
void SystemInit(void)
{
/*
**************************
* Sub module clock setting
**************************
*/
syscon_SetIvrefX32WithMask(QN_SYSCON, SYSCON_MASK_DVDD12_SW_EN, MASK_ENABLE);
syscon_set_sysclk_src(CLK_XTAL, __XTAL);
#if __XTAL == XTAL_32MHz
calibration_init(XTAL_32M);
#else
calibration_init(XTAL_16M);
#endif
ref_pll_calibration();
clk32k_enable(__32K_TYPE);
#if QN_32K_RCO
rco_calibration();
#endif
// Disable all peripheral clock, will be enabled in the driver initilization.
timer_clock_off(QN_TIMER0);
timer_clock_off(QN_TIMER1);
timer_clock_off(QN_TIMER2);
timer_clock_off(QN_TIMER3);
uart_clock_off(QN_UART0);
uart_clock_off(QN_UART1);
spi_clock_off(QN_SPI0);
usart_reset((uint32_t) QN_SPI1);
spi_clock_off(QN_SPI1);
flash_clock_off();
gpio_clock_off();
adc_clock_off();
dma_clock_off();
pwm_clock_off();
// calibration will change system clock setting
// Configure sytem clock.
syscon_set_sysclk_src(CLK_XTAL, __XTAL);
syscon_set_ahb_clk(__AHB_CLK);
syscon_set_apb_clk(__APB_CLK);
syscon_set_ble_clk(__BLE_CLK);
syscon_set_timer_clk(__TIMER_CLK);
syscon_set_usart_clk((uint32_t)QN_UART0, __USART_CLK);
syscon_set_usart_clk((uint32_t)QN_UART1, __USART_CLK);
/*
**************************
* IO configuration
**************************
*/
SystemIOCfg();
/*
**************************
* Peripheral setting
**************************
*/
}
