#include <stdio.h>
#include <string.h>
#include "wm_hal.h"
#include "fifo.h"

UART_HandleTypeDef huart1;

static void UART1_Init(void);
void Error_Handler(void);

#define IT_LEN 0 	// 大于等于0，0：接收不定长数据即可触发中断回调；大于0：接收N个长度数据才触发中断回调
static uint8_t buf[32] = {0}; // 必须大于等于32字节
#define LEN 2048
static uint8_t pdata[LEN] = {0};
int main(void)
{
	volatile int tx_len = 0;
	uint8_t tx_buf[100] = {0};
	
	SystemClock_Config(CPU_CLK_160M);
	printf("enter main\r\n");
	
	UART1_Init();
	FifoInit(pdata, LEN);
	HAL_UART_Receive_IT(&huart1, buf, IT_LEN);		// 只需调用一次，接收够设定的长度，进入中断回调，用户需要在中断回调中取走数据，此处设置了
												// 0个字节，即不定长
	while(1)
	{	
		tx_len = FifoDataLen();
		if (tx_len > 0)
		{
			tx_len = (tx_len > 100) ? 100 : tx_len;
			FifoRead(tx_buf, tx_len);
			HAL_UART_Transmit(&huart1, tx_buf, tx_len, 1000);
		}
	}
	
    return 0;
}

static void UART1_Init(void)
{
	huart1.Instance = UART1;
	huart1.Init.BaudRate = 115200;
	huart1.Init.WordLength = UART_WORDLENGTH_8B;
	huart1.Init.StopBits = UART_STOPBITS_1;
	huart1.Init.Parity = UART_PARITY_NONE;
	huart1.Init.Mode = UART_MODE_TX | UART_MODE_RX;
	huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
	if (HAL_UART_Init(&huart1) != HAL_OK)
	{
		Error_Handler();
	}
}

void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
	if (FifoSpaceLen() >= huart->RxXferCount)
	{
		FifoWrite(huart->pRxBuffPtr, huart->RxXferCount);
	}
}

void Error_Handler(void)
{
	while (1)
	{
	}
}

void assert_failed(uint8_t *file, uint32_t line)
{
	printf("Wrong parameters value: file %s on line %d\r\n", file, line);
}