98 lines
2.4 KiB
C
98 lines
2.4 KiB
C
/*
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* Copyright (c) 2006-2021, 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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*/
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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 "serial.h"
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#define FOSC0 12000000
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#define FCPU 60000000
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#define FHSB FCPU
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#define FPBA FCPU
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#define FPBB FCPU
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extern void rt_hw_serial_isr(void);
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extern void rt_hw_usart_init(void);
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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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/*
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* USART1 initialization
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*/
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gpio_enable_module_pin(AVR32_USART1_TXD_0_1_PIN, AVR32_USART1_TXD_0_1_FUNCTION);
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gpio_enable_module_pin(AVR32_USART1_RXD_0_1_PIN, AVR32_USART1_RXD_0_1_FUNCTION);
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static const usart_options_t usartOptions = {
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.baudrate = 115200,
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.charlength = 8,
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.paritytype = USART_NO_PARITY,
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.stopbits = USART_1_STOPBIT,
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.channelmode = USART_NORMAL_CHMODE
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};
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usart_init_rs232(&AVR32_USART1, &usartOptions, FCPU);
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INTC_init_interrupts();
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INTC_register_interrupt(&rt_hw_serial_isr, AVR32_USART1_IRQ, AVR32_INTC_INT0);
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AVR32_USART1.ier = AVR32_USART_IER_RXRDY_MASK;
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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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extern struct rt_device _rt_usart_device;
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extern struct avr32_serial_device uart;
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Disable_global_interrupt();
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peripherals_init();
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cpu_counter_init();
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rt_hw_serial_register(&_rt_usart_device, "uart1", RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_STREAM, &uart);
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rt_console_set_device("uart1");
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}
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