2021年03月01日 | 一个简单的STM32vet6驱动2.4寸240X320的8位并口tft屏

最近在研究用低速、低RAM的单片机来驱动小LCD或TFT彩屏实现动画效果

首先我用一个16MHz晶振的m0内核的8位单片机nRF51822尝试驱动一个1.77寸的4线SPI屏（128X160），

发现，刷一屏大约要0.8s左右的时间，

具体收录在《1、一个简单的nRF51822驱动的天马4线SPI-1.77寸LCD彩屏DEMO》中

觉得，如果用72MHz的STM32也许效果会好很多

于是在stm32上做了个类似的版本，

具体收录在《一个简单的stm32vet6驱动的天马4线SPI-1.77寸LCD彩屏DEMO》中

发现刷一屏0.2s左右，

效果是有的，但是还不能达到支持播放流畅动画的效果！

于是，决定将串行数据改成并行数据传输

本节将带来一个用stm32驱动的2.4寸240X320的8位并口tft屏的刷屏效果

工程结构

main.c

1 /* Includes ------------------------------------------------------------------*/

2 #include "stm32f10x.h"

3 #include "LCD2.h"

4

5

6 void RCC_Configuration(void);

7 /****************************************************************************

8 * 名 称：int main(void)

9 * 功 能：主函数

10 * 入口参数：无

11 * 出口参数：无

12 * 说 明：

13 * 调用方法：无

14 ****************************************************************************/

15 int main(void)

16 {

17 RCC_Configuration(); //系统时钟配置

18 LCD2_GPIO_Init();

19 LCD2_Init();

20 while (1)

21 {

22 Show_RGB(0,240,0,320,0xff0f);

23 DELAY_MS(1000);

24 Show_RGB(0,240,0,320,0x00fe);

25 DELAY_MS(1000);

26 }

27 }

28

29 /****************************************************************************

30 * 名 称：void RCC_Configuration(void)

31 * 功 能：系统时钟配置为72MHZ

32 * 入口参数：无

33 * 出口参数：无

34 * 说 明：

35 * 调用方法：无

36 ****************************************************************************/

37 void RCC_Configuration(void)

38 {

39 SystemInit();

40 }

LCD2.c

1 #include "LCD2.h"

2

3

4

5 void LCD2_GPIO_Init()

6 {

7 GPIO_InitTypeDef GPIO_InitStructure;

8

9 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB " RCC_APB2Periph_GPIOD | RCC_APB2Periph_AFIO, ENABLE);

10

11

12 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9;

13 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;

14 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //口线翻转速度为50MHz

15 GPIO_Init(GPIOB, &GPIO_InitStructure);

16

17 //8位数据输出

18 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3 | GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7;

19 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;

20 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //口线翻转速度为50MHz

21 GPIO_Init(GPIOD, &GPIO_InitStructure);

22 }

23

24 //////////////////////////////////////////////////////////////////

25 //最底层数据传输函数

26 //////////////////////////////////////////////////////////////////

27 //写命令

28 void Write_Cmd(unsigned char DH,unsigned char DL)

29 {

30 LCD2_CS=0;

31 LCD2_RS=0;

32

33 DataPort=DH;

34 LCD2_RW=0;

35 LCD2_RW=1;

36

37 DataPort=DL;

38

39 LCD2_RW=0;

40 LCD2_RW=1;

41 LCD2_CS=1;

42 }

43 //写数据 双8位

44 void Write_Data(unsigned char DH,unsigned char DL)

45 {

46 LCD2_CS=0;

47

48 LCD2_RS=1;

49 DataPort=DH;

50 LCD2_RW=0;

51 LCD2_RW=1;

52

53 DataPort=DL;

54 LCD2_RW=0;

55 LCD2_RW=1;

56 LCD2_CS=1;

57 }

58

59 //写数据 双8位

60 void Write_Data2(unsigned char DH,unsigned char DL)

61 {

62 DataPort=DH;

63 LCD2_RW=0;

64 LCD2_RW=1;

65

66 DataPort=DL;

67 LCD2_RW=0;

68 LCD2_RW=1;

69 }

70

71 //////////////////////////////////////////////////////////////////

72 //调用上面最底层实现稍高层写命令和数据函数

73 //////////////////////////////////////////////////////////////////

74 /*----------------------------------------------------------------

75 写命令、写数据

76 输入参数：x 需要输入的命令 16位

77 y 需要输入的数据 16位

78 ----------------------------------------------------------------*/

79 void Write_Cmd_Data (unsigned char x,unsigned int y)

80 {

81 unsigned char m,n;

82 m=y>>8;

83 n=y;

84 Write_Cmd(0x00,x);

85 Write_Data(m,n);

86 }

87 /*----------------------------------------------------------------

88 写16位数据

89 ----------------------------------------------------------------*/

90 void Write_Data_U16(unsigned int y)

91 {

92 unsigned char m,n;

93 m=y>>8;

94 n=y;

95 Write_Data2(m,n);

96 }

97

98 /*----------------------------------------------------------------

99 液晶初始化

100 ----------------------------------------------------------------*/

101 void LCD2_Init(void)

102 {

103 LCD2_CS=1;

104 DELAY_MS(5);

105 LCD2_RES=0;

106 DELAY_MS(5);

107 LCD2_RES=1;

108 DELAY_MS(50);

109 Write_Cmd_Data(0x0001,0x0100);

110 Write_Cmd_Data(0x0002,0x0700);

111 Write_Cmd_Data(0x0003,0x1030);

112 Write_Cmd_Data(0x0004,0x0000);

113 Write_Cmd_Data(0x0008,0x0207);

114 Write_Cmd_Data(0x0009,0x0000);

115 Write_Cmd_Data(0x000A,0x0000);

116 Write_Cmd_Data(0x000C,0x0000);

117 Write_Cmd_Data(0x000D,0x0000);

118 Write_Cmd_Data(0x000F,0x0000);

119 //power on sequence VGHVGL

120 Write_Cmd_Data(0x0010,0x0000);

121 Write_Cmd_Data(0x0011,0x0007);

122 Write_Cmd_Data(0x0012,0x0000);

123 Write_Cmd_Data(0x0013,0x0000);

124 //vgh

125 Write_Cmd_Data(0x0010,0x1290);

126 Write_Cmd_Data(0x0011,0x0227);

127 //DELAY_MS(100);

128 //vregiout

129 Write_Cmd_Data(0x0012,0x001d); //0x001b

130 //DELAY_MS(100);

131 //vom amplitude

132 Write_Cmd_Data(0x0013,0x1500);

133 //DELAY_MS(100);

134 //vom H

135 Write_Cmd_Data(0x0029,0x0018);

136 Write_Cmd_Data(0x002B,0x000D);

137

138 //gamma

139 Write_Cmd_Data(0x0030,0x0004);

140 Write_Cmd_Data(0x0031,0x0307);

141 Write_Cmd_Data(0x0032,0x0002);// 0006

142 Write_Cmd_Data(0x0035,0x0206);

143 Write_Cmd_Data(0x0036,0x0408);

144 Write_Cmd_Data(0x0037,0x0507);

145 Write_Cmd_Data(0x0038,0x0204);//0200

146 Write_Cmd_Data(0x0039,0x0707);

147 Write_Cmd_Data(0x003C,0x0405);// 0504

148 Write_Cmd_Data(0x003D,0x0F02);

149 //ram

150 Write_Cmd_Data(0x0050,0x0000);

151 Write_Cmd_Data(0x0051,0x00EF);

152 Write_Cmd_Data(0x0052,0x0000);

153 Write_Cmd_Data(0x0053,0x013F);

154 Write_Cmd_Data(0x0060,0xA700);

155 Write_Cmd_Data(0x0061,0x0001);

156 Write_Cmd_Data(0x006A,0x0000);

157 //

158 Write_Cmd_Data(0x0080,0x0000);

159 Write_Cmd_Data(0x0081,0x0000);

160 Write_Cmd_Data(0x0082,0x0000);

161 Write_Cmd_Data(0x0083,0x0000);

162 Write_Cmd_Data(0x0084,0x0000);

163 Write_Cmd_Data(0x0085,0x0000);

164 //

165 Write_Cmd_Data(0x0090,0x0010);

166 Write_Cmd_Data(0x0092,0x0600);

167 Write_Cmd_Data(0x0093,0x0003);

168 Write_Cmd_Data(0x0095,0x0110);

169 Write_Cmd_Data(0x0097,0x0000);

170 Write_Cmd_Data(0x0098,0x0000);