#include "SWM320.h"

#include "ugui.h"


#define LCD_HDOT	480		// 水平点数
#define LCD_VDOT	272		// 垂直点数
#define LCD_DIRH	1		// 水平显示？


/* 注意：
	存储器的带宽需要大于LCD刷新所需带宽，否则显示会出现虚影
	最好使得SDRAM带宽达到LCD带宽的2倍，这样可保证SDRAM在被CPU写入的同时，依然能够满足LCD读取的带宽
*/


UG_GUI gui;


uint32_t *LCD_Buffer = (uint32_t *)SDRAMM_BASE;

void _HW_DrawPoint(UG_S16 x, UG_S16 y, UG_COLOR c)
{	
		uint32_t temp;
	
#if LCD_DIRH
	temp  = LCD_Buffer[y * (LCD_HDOT/2) + x/2];
	temp &= ~(0xFFFF << ((x%2) == 0 ? 0 : 16));
	temp |=  (c      << ((x%2) == 0 ? 0 : 16));
	LCD_Buffer[y * (LCD_HDOT/2) + x/2]  = temp;
#else
	temp  = LCD_Buffer[(LCD_VDOT - x) * (LCD_HDOT/2) + y/2];
	temp &= ~(0xFFFF << ((y%2) == 0 ? 0 : 16));
	temp |=  (c      << ((y%2) == 0 ? 0 : 16));
	LCD_Buffer[(LCD_VDOT - x) * (LCD_HDOT/2) + y/2]  = temp;
#endif
	
	LCD_Buffer[y*240 + x/2] &= ~(0xFFFF << ((x%2) == 0 ? 0 : 16));
	LCD_Buffer[y*240 + x/2] |=  (c      << ((x%2) == 0 ? 0 : 16));
}


void SerialInit(void);
void MemoryInit(void);
void RGBLCDInit(void);
void DrawImage(uint32_t x, uint32_t y, uint32_t w, uint32_t h, uint32_t addr);
void NORFlash2SDRAM(uint32_t nor_addr, uint32_t sdr_addr, uint32_t word_count);

int main(void)
{	
	uint32_t i;
	
	SystemInit();
		
	SerialInit();
	
	MemoryInit();
	
	RGBLCDInit();
	
	LCD->SRCADDR = (uint32_t)LCD_Buffer;
	
	LCD_Start(LCD);
	
#if LCD_DIRH
	UG_Init(&gui,(void(*)(UG_S16,UG_S16,UG_COLOR))_HW_DrawPoint, LCD_HDOT, LCD_VDOT);
#else
	UG_Init(&gui,(void(*)(UG_S16,UG_S16,UG_COLOR))_HW_DrawPoint, LCD_VDOT, LCD_HDOT);
#endif
	
	NORFlash2SDRAM(0x000000, 0x100000, 480*272*2/4);	// 从NOR Flash读取图片数据，存储到SDRAM的高位地址处
	NORFlash2SDRAM(0x100000, 0x200000, 480*272*2/4);

	while(1==1)
	{
		DrawImage(0, 0, 480, 272, 0x100000);			// 显示第一张图片
		for(i = 0; i < SystemCoreClock; i++) __NOP();
		
		DrawImage(0, 0, 480, 272, 0x200000);			//显示第二张图片
		for(i = 0; i < SystemCoreClock; i++) __NOP();
	}
}


void RGBLCDInit(void)
{
	LCD_InitStructure LCD_initStruct;
	
	GPIO_Init(GPIOC, PIN1, 1, 0, 0);//背光控制
	GPIO_SetBit(GPIOC, PIN1);		//点亮背光
	
	PORT->PORTN_SEL0 = 0xAAAAAAAA;	//GPION.0～15  LCD_DATA0～15
	PORT->PORTN_SEL1 = 0xAA;
	
	LCD_initStruct.HnPixel = LCD_HDOT;	//水平480像素
	LCD_initStruct.VnPixel = LCD_VDOT;	//垂直272像素
	LCD_initStruct.Hfp = 5;
	LCD_initStruct.Hbp = 40;
	LCD_initStruct.Vfp = 8;
	LCD_initStruct.Vbp = 8;
	LCD_initStruct.ClkDiv = LCD_CLKDIV_16;	// 注意手册上屏幕的时钟要求
	LCD_initStruct.ClkAlways = 0;
	LCD_initStruct.SamplEdge = LCD_SAMPLEDGE_FALL;
	LCD_initStruct.HsyncWidth = LCD_HSYNC_3DOTCLK;
	LCD_initStruct.IntEOTEn = 1;
	LCD_Init(LCD, &LCD_initStruct);
}

void LCD_Handler(void)
{
	LCD_INTClr(LCD);
	
	LCD_Start(LCD);
}


void MemoryInit(void)
{
	NORFL_InitStructure NORFL_InitStruct;
	SDRAM_InitStructure SDRAM_InitStruct;
	
	PORT->PORTP_SEL0 = 0xAAAAAAAA;		//PP0-23 => ADDR0-23
	PORT->PORTP_SEL1 = 0x0000AAAA;
	
	PORT->PORTM_SEL0 = 0xAAAAAAAA;		//PM0-15 => DATA15-0
	PORT->PORTM_INEN = 0xFFFF;
	
	PORT->PORTM_SEL1 = 0xAAA;			//PM16 => OEN、PM17 => WEN、PM18 => NORFL_CSN、PM19 => SDRAM_CSN、PM20 => SRAM_CSN、PM21 => SDRAM_CKE
	
	NORFL_InitStruct.DataWidth = 16;
	NORFL_InitStruct.WELowPulseTime = 5;
	NORFL_InitStruct.OEPreValidTime = 12;
	NORFL_InitStruct.OperFinishIEn  = 0;
	NORFL_InitStruct.OperTimeoutIEn = 0;
	NORFL_Init(&NORFL_InitStruct);
	
	SDRAM_InitStruct.CellSize = SDRAM_CELLSIZE_256Mb;
	SDRAM_InitStruct.CellWidth = SDRAM_CELLWIDTH_16;
	SDRAM_InitStruct.CASLatency = SDRAM_CASLATENCY_2;
	SDRAM_InitStruct.RefreshTime = 64;
	SDRAM_InitStruct.TimeTMRD = SDRAM_TMRD_3;
	SDRAM_InitStruct.TimeTRRD = SDRAM_TRRD_2;
	SDRAM_InitStruct.TimeTRAS = SDRAM_TRAS_6;
	SDRAM_InitStruct.TimeTRC  = SDRAM_TRC_8;
	SDRAM_InitStruct.TimeTRCD = SDRAM_TRCD_3;
	SDRAM_InitStruct.TimeTRP  = SDRAM_TRP_3;
	SDRAM_Init(&SDRAM_InitStruct);
}

void NORFlash2SDRAM(uint32_t nor_addr, uint32_t sdr_addr, uint32_t word_count)
{
	uint32_t n, i;
	uint32_t buffer[256];
	
	for(n = 0; n < word_count/256; n++)
	{
		SDRAM_Disable();	//读写SRAM、NOR Flash时需要关闭SDRAM
		for(i = 0; i < 256; i++)  buffer[i] = *((volatile uint32_t *)(NORFLM_BASE + nor_addr) + 256*n + i);
		
		SDRAM_Enable();		//读写SDRAM时需要开启SDRAM
		for(i = 0; i < 256; i++)  *((volatile uint32_t *)(SDRAMM_BASE + sdr_addr) + 256*n + i) = buffer[i];
	}
	
	if(word_count%256)
	{
		SDRAM_Disable();	//读写SRAM、NOR Flash时需要关闭SDRAM
		for(i = 0; i < word_count%256; i++)  buffer[i] = *((volatile uint32_t *)(NORFLM_BASE + nor_addr) + 256*n + i);
		
		SDRAM_Enable();		//读写SDRAM时需要开启SDRAM
		for(i = 0; i < word_count%256; i++)  *((volatile uint32_t *)(SDRAMM_BASE + sdr_addr) + 256*n + i) = buffer[i];
	}
}


/****************************************************************************************************************************************** 
* 函数名称:	DrawImage()
* 功能说明:	在指定位置显示指定大小的图片
* 输    入: uint32_t x, y	图片要显示在屏幕的哪个位置，x必须是偶数
*			uint32_t w, h	图片的大小
*			uint32_t addr   图片数据在SDRAM中的存储地址
* 输    出: 无
* 注意事项: 适用于分辨率480*272的屏幕，在其他分辨率的屏幕上使用请修改代码中的480
******************************************************************************************************************************************/
void DrawImage(uint32_t x, uint32_t y, uint32_t w, uint32_t h, uint32_t addr)
{
	uint32_t i, j;
	
	for(i = 0; i < h; i++)
	{
		for(j = 0; j < w; j+=2)
		{
			LCD_Buffer[((y+i)*480 + (x+j))/2] = *((volatile uint32_t *)(SDRAMM_BASE + addr) + (i*w + j)/2);
		}
	}
}


void SerialInit(void)
{
	UART_InitStructure UART_initStruct;
	
	PORT_Init(PORTA, PIN2, FUNMUX0_UART0_RXD, 1);	//GPIOA.2配置为UART0输入引脚
	PORT_Init(PORTA, PIN3, FUNMUX1_UART0_TXD, 0);	//GPIOA.3配置为UART0输出引脚
 	
 	UART_initStruct.Baudrate = 57600;
	UART_initStruct.DataBits = UART_DATA_8BIT;
	UART_initStruct.Parity = UART_PARITY_NONE;
	UART_initStruct.StopBits = UART_STOP_1BIT;
	UART_initStruct.RXThresholdIEn = 0;
	UART_initStruct.TXThresholdIEn = 0;
	UART_initStruct.TimeoutIEn = 0;
 	UART_Init(UART0, &UART_initStruct);
	UART_Open(UART0);
}

/****************************************************************************************************************************************** 
* 函数名称: fputc()
* 功能说明: printf()使用此函数完成实际的串口打印动作
* 输    入: int ch		要打印的字符
*			FILE *f		文件句柄
* 输    出: 无
* 注意事项: 无
******************************************************************************************************************************************/
int fputc(int ch, FILE *f)
{
	UART_WriteByte(UART0, ch);
	
	while(UART_IsTXBusy(UART0));
 	
	return ch;
}