1 /*
2 * Copyright (c) 2006-2023, RT-Thread Development Team
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 *
6 * Change Logs:
7 * Date Author Notes
8 * 2010-03-30 Kyle First version
9 * 2023-10-13 Raman Gopalan Move UART specific code sections into the drv_uart files
10 * 2023-10-20 Raman Gopalan Initialize GPIO sub-system
11 */
12
13 #include <rtthread.h>
14 #include "compiler.h"
15 #include "pm.h"
16 #include "gpio.h"
17 #include "usart.h"
18 #include "intc.h"
19 #include "drv_uart.h"
20 #include "drv_gpio.h"
21
22 /**
23 * System tick interrupt handler.
24 */
rt_hw_timer_handler(void)25 static void rt_hw_timer_handler(void)
26 {
27 // Clears the interrupt request.
28 Set_system_register(AVR32_COMPARE, FCPU / RT_TICK_PER_SECOND);
29
30 rt_tick_increase();
31 }
32
33 /**
34 * Initialize system clock and all peripherals.
35 */
peripherals_init(void)36 static void peripherals_init(void)
37 {
38 /*
39 * PM initialization: OSC0 = 12MHz XTAL, PLL0 = 60MHz System Clock
40 */
41 pm_freq_param_t pm_freq_param =
42 {
43 .cpu_f = FCPU,
44 .pba_f = FPBA,
45 .osc0_f = FOSC0,
46 .osc0_startup = AVR32_PM_OSCCTRL0_STARTUP_2048_RCOSC
47 };
48 pm_configure_clocks(&pm_freq_param);
49 INTC_init_interrupts();
50 }
51
52 /**
53 * Initialize CPU cycle counter for system tick.
54 */
cpu_counter_init(void)55 static void cpu_counter_init(void)
56 {
57 INTC_register_interrupt(&rt_hw_timer_handler, AVR32_CORE_COMPARE_IRQ, AVR32_INTC_INT3);
58 Set_system_register(AVR32_COMPARE, FCPU / RT_TICK_PER_SECOND);
59 Set_system_register(AVR32_COUNT, 0);
60 }
61
rt_hw_board_init(void)62 void rt_hw_board_init(void)
63 {
64 Disable_global_interrupt();
65
66 peripherals_init();
67 cpu_counter_init();
68
69 #ifdef RT_USING_COMPONENTS_INIT
70 rt_components_board_init();
71 #endif
72
73 #ifdef RT_USING_SERIAL
74 rt_hw_uart_init();
75 #endif
76
77 #ifdef RT_USING_PIN
78 rt_hw_gpio_init();
79 #endif
80
81 #ifdef RT_USING_CONSOLE
82 rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
83 #endif
84 }
85