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// Copyright (c) 2019-2023 by Lattice Semiconductor Corporation
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#include "uart.h"
#include "gpio.h"
#include "pic.h"
#include "utils.h"
#include <stdio.h>

struct uart_instance uart_core_uart;
struct gpio_instance gpio_inst;

int main(void) {
	static uint8_t idx = 0;
	static uint8_t pin_state = 0xFF;

	//initialize GPIO
	gpio_inst.instance_name = GPIO0_INST_NAME;
	gpio_init(&gpio_inst, GPIO0_INST_BASE_ADDR, GPIO0_INST_LINES_NUM, GPIO0_INST_GPIO_DIRS);

#if _UART_ENABLE_INTERRUPTS_
	//setup uart IRQ
	pic_init(CPU0_INST_PICTIMER_START_ADDR);
	uart_core_uart.intrLevel = UART0_INST_IRQ;
	pic_isr_register(UART0_INST_IRQ, uart_isr, (void *)&uart_core_uart);
#endif

	//initialize UART
	uart_init(&uart_core_uart, UART0_INST_BASE_ADDR, CPU_FREQUENCY, UART0_INST_BAUD_RATE, 1, 8);

#ifdef LSCC_STDIO_UART_APB
	extern struct uart_instance *g_stdio_uart;
	g_stdio_uart = &uart_core_uart;
#endif

	printf("Hello RISC-V world!\r\n");

	while (true) {
		gpio_output_write(&gpio_inst, idx, pin_state);

		if (++idx == LED_COUNT) {
			idx = 0;
			pin_state = ~pin_state;
		}

		if (RTL_SIM) {
			delayMS(1);
		} else {
			delayMS(500);
		}
	}

	return 0;
}