/* * Copyright (c) 2006-2021, RT-Thread Development Team * * SPDX-License-Identifier: Apache-2.0 * * Change Logs: * Date Author Notes * 2010-03-30 Kyle First version */ #include <rtthread.h> #include "compiler.h" #include "pm.h" #include "gpio.h" #include "usart.h" #include "intc.h" #include "serial.h" #define FOSC0 12000000 #define FCPU 60000000 #define FHSB FCPU #define FPBA FCPU #define FPBB FCPU extern void rt_hw_serial_isr(void); extern void rt_hw_usart_init(void); /** * System tick interrupt handler. */ static void rt_hw_timer_handler(void) { // Clears the interrupt request. Set_system_register(AVR32_COMPARE, FCPU / RT_TICK_PER_SECOND); rt_tick_increase(); } /** * Initialize system clock and all peripherals. */ static void peripherals_init(void) { /* * PM initialization: OSC0 = 12MHz XTAL, PLL0 = 60MHz System Clock */ pm_freq_param_t pm_freq_param = { .cpu_f = FCPU, .pba_f = FPBA, .osc0_f = FOSC0, .osc0_startup = AVR32_PM_OSCCTRL0_STARTUP_2048_RCOSC }; pm_configure_clocks(&pm_freq_param); /* * USART1 initialization */ gpio_enable_module_pin(AVR32_USART1_TXD_0_1_PIN, AVR32_USART1_TXD_0_1_FUNCTION); gpio_enable_module_pin(AVR32_USART1_RXD_0_1_PIN, AVR32_USART1_RXD_0_1_FUNCTION); static const usart_options_t usartOptions = { .baudrate = 115200, .charlength = 8, .paritytype = USART_NO_PARITY, .stopbits = USART_1_STOPBIT, .channelmode = USART_NORMAL_CHMODE }; usart_init_rs232(&AVR32_USART1, &usartOptions, FCPU); INTC_init_interrupts(); INTC_register_interrupt(&rt_hw_serial_isr, AVR32_USART1_IRQ, AVR32_INTC_INT0); AVR32_USART1.ier = AVR32_USART_IER_RXRDY_MASK; } /** * Initialize CPU cycle counter for system tick. */ static void cpu_counter_init(void) { INTC_register_interrupt(&rt_hw_timer_handler, AVR32_CORE_COMPARE_IRQ, AVR32_INTC_INT3); Set_system_register(AVR32_COMPARE, FCPU / RT_TICK_PER_SECOND); Set_system_register(AVR32_COUNT, 0); } void rt_hw_board_init(void) { extern struct rt_device _rt_usart_device; extern struct avr32_serial_device uart; Disable_global_interrupt(); peripherals_init(); cpu_counter_init(); rt_hw_serial_register(&_rt_usart_device, "uart1", RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_STREAM, &uart); rt_console_set_device("uart1"); }