85 lines
1.8 KiB
C
85 lines
1.8 KiB
C
/*
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* Copyright (c) 2006-2023, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2010-03-30 Kyle First version
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* 2023-10-13 Raman Gopalan Move UART specific code sections into the drv_uart files
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* 2023-10-20 Raman Gopalan Initialize GPIO sub-system
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*/
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#include <rtthread.h>
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#include "compiler.h"
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#include "pm.h"
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#include "gpio.h"
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#include "usart.h"
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#include "intc.h"
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#include "drv_uart.h"
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#include "drv_gpio.h"
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/**
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* System tick interrupt handler.
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*/
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static void rt_hw_timer_handler(void)
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{
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// Clears the interrupt request.
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Set_system_register(AVR32_COMPARE, FCPU / RT_TICK_PER_SECOND);
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rt_tick_increase();
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}
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/**
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* Initialize system clock and all peripherals.
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*/
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static void peripherals_init(void)
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{
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/*
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* PM initialization: OSC0 = 12MHz XTAL, PLL0 = 60MHz System Clock
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*/
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pm_freq_param_t pm_freq_param =
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{
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.cpu_f = FCPU,
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.pba_f = FPBA,
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.osc0_f = FOSC0,
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.osc0_startup = AVR32_PM_OSCCTRL0_STARTUP_2048_RCOSC
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};
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pm_configure_clocks(&pm_freq_param);
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INTC_init_interrupts();
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}
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/**
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* Initialize CPU cycle counter for system tick.
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*/
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static void cpu_counter_init(void)
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{
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INTC_register_interrupt(&rt_hw_timer_handler, AVR32_CORE_COMPARE_IRQ, AVR32_INTC_INT3);
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Set_system_register(AVR32_COMPARE, FCPU / RT_TICK_PER_SECOND);
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Set_system_register(AVR32_COUNT, 0);
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}
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void rt_hw_board_init(void)
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{
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Disable_global_interrupt();
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peripherals_init();
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cpu_counter_init();
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#ifdef RT_USING_COMPONENTS_INIT
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rt_components_board_init();
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#endif
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#ifdef RT_USING_SERIAL
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rt_hw_uart_init();
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#endif
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#ifdef RT_USING_PIN
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rt_hw_gpio_init();
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#endif
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#ifdef RT_USING_CONSOLE
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rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
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#endif
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}
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