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 * 2023-12-01 Raman Gopalan Initialize software I2C sub-system
12 */
13
14 #include <rtthread.h>
15 #include "compiler.h"
16 #include "pm.h"
17 #include "gpio.h"
18 #include "usart.h"
19 #include "intc.h"
20 #include "drv_uart.h"
21 #include "drv_gpio.h"
22 #include "drv_soft_i2c.h"
23
24 /**
25 * System tick interrupt handler.
26 */
rt_hw_timer_handler(void)27 static void rt_hw_timer_handler(void)
28 {
29 // Clears the interrupt request.
30 Set_system_register(AVR32_COMPARE, FCPU / RT_TICK_PER_SECOND);
31
32 rt_tick_increase();
33 }
34
35 /**
36 * Initialize system clock and all peripherals.
37 */
peripherals_init(void)38 static void peripherals_init(void)
39 {
40 /*
41 * PM initialization: OSC0 = 12MHz XTAL, PLL0 = 60MHz System Clock
42 */
43 pm_freq_param_t pm_freq_param =
44 {
45 .cpu_f = FCPU,
46 .pba_f = FPBA,
47 .osc0_f = FOSC0,
48 .osc0_startup = AVR32_PM_OSCCTRL0_STARTUP_2048_RCOSC
49 };
50 pm_configure_clocks(&pm_freq_param);
51 INTC_init_interrupts();
52 }
53
54 /**
55 * Initialize CPU cycle counter for system tick.
56 */
cpu_counter_init(void)57 static void cpu_counter_init(void)
58 {
59 INTC_register_interrupt(&rt_hw_timer_handler, AVR32_CORE_COMPARE_IRQ, AVR32_INTC_INT3);
60 Set_system_register(AVR32_COMPARE, FCPU / RT_TICK_PER_SECOND);
61 Set_system_register(AVR32_COUNT, 0);
62 }
63
rt_hw_board_init(void)64 void rt_hw_board_init(void)
65 {
66 Disable_global_interrupt();
67
68 peripherals_init();
69 cpu_counter_init();
70
71 #ifdef RT_USING_COMPONENTS_INIT
72 rt_components_board_init();
73 #endif
74
75 #ifdef RT_USING_SERIAL
76 rt_hw_uart_init();
77 #endif
78
79 #ifdef RT_USING_PIN
80 rt_hw_gpio_init();
81 #endif
82
83 #ifdef BSP_USING_SOFT_I2C
84 rt_sw_i2c_init();
85 #endif
86
87 #ifdef RT_USING_CONSOLE
88 rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
89 #endif
90 }
91