前言

嵌入式系统里面，人机界面显示屏这块，不管CPU还是RAM，基本都是很耗资源的，所以在驱动这块，尽量选择DMA去驱动。

这次板子用的性价比很高的SPI接口TFT屏，320*240分辨率，565（16BIT）色深

显示屏下指令使用SPI POLLING模式，因为数据量少，用DMA反而不划算，显示屏送图形使用DMA，图片数据长度3202402 = 153600字节

一、驱动代码

#include "board.h"#define LCDCODE_REGFLAG_DELAY       0xFFFE
#define LCDCODE_REGFLAG_END         0xFFFF
#define LCDCODE_DATA_LEN            32typedef struct
{uint16_t reg;uint16_t len;uint8_t  dat[LCDCODE_DATA_LEN];
}lcd_code_t;static struct rt_semaphore spi3_tx_wait = {0x00};static void spi3_tx_dma_tc0_irq_cb(void)
{DMA_ClearIrqFlag(SPI3_DMA_UNIT, SPI3_DMA_TX_CHANNEL, TrnCpltIrq);rt_sem_release(&spi3_tx_wait);
}static void spi3_dma_config(void)
{stc_dma_config_t stcDmaCfg;stc_irq_regi_conf_t stcIrqRegiConf;/* configuration structure initialization */MEM_ZERO_STRUCT(stcDmaCfg);/* Configuration peripheral clock */PWC_Fcg0PeriphClockCmd(SPI3_DMA_CLOCK_UNIT, Enable);PWC_Fcg0PeriphClockCmd(PWC_FCG0_PERIPH_AOS, Enable);/* Configure TX DMA */stcDmaCfg.u16BlockSize           = 1;stcDmaCfg.u16TransferCnt         = 1;stcDmaCfg.u32SrcAddr             = (uint32_t)(0);stcDmaCfg.u32DesAddr             = (uint32_t)(&SPI3_UNIT->DR);stcDmaCfg.stcDmaChCfg.enSrcInc   = AddressIncrease;stcDmaCfg.stcDmaChCfg.enDesInc   = AddressFix;stcDmaCfg.stcDmaChCfg.enTrnWidth = Dma8Bit;stcDmaCfg.stcDmaChCfg.enIntEn    = Enable;DMA_InitChannel(SPI3_DMA_UNIT, SPI3_DMA_TX_CHANNEL, &stcDmaCfg);DMA_SetTriggerSrc(SPI3_DMA_UNIT, SPI3_DMA_TX_CHANNEL, SPI3_DMA_TX_TRIG_SOURCE);/* Enable DMA. */DMA_Cmd(SPI3_DMA_UNIT, Enable);/* Set DMA block transfer complete IRQ */stcIrqRegiConf.enIRQn      = IRQ_SPI3_DMA_TX;stcIrqRegiConf.pfnCallback = &spi3_tx_dma_tc0_irq_cb;stcIrqRegiConf.enIntSrc    = INT_DMA1_TC0;enIrqRegistration(&stcIrqRegiConf);NVIC_SetPriority(stcIrqRegiConf.enIRQn, IRQ_PRIORITY_SPI3_DMA_TX);NVIC_ClearPendingIRQ(stcIrqRegiConf.enIRQn);NVIC_EnableIRQ(stcIrqRegiConf.enIRQn);
}static void bsp_spi3_init(void)
{stc_spi_init_t stcSpiInit;/* configuration structure initialization */MEM_ZERO_STRUCT(stcSpiInit);/* Configuration peripheral clock */PWC_Fcg1PeriphClockCmd(SPI3_UNIT_CLOCK, Enable);/* Configuration peripheral clock */PWC_Fcg1PeriphClockCmd(SPI3_UNIT_CLOCK, Enable);/* Configuration SPI structure */stcSpiInit.enClkDiv                 = SpiClkDiv2;stcSpiInit.enFrameNumber            = SpiFrameNumber1;stcSpiInit.enDataLength             = SpiDataLengthBit8;stcSpiInit.enFirstBitPosition       = SpiFirstBitPositionMSB;stcSpiInit.enSckPolarity            = SpiSckIdleLevelLow;stcSpiInit.enSckPhase               = SpiSckOddSampleEvenChange;stcSpiInit.enReadBufferObject       = SpiReadReceiverBuffer;stcSpiInit.enWorkMode               = SpiWorkMode3Line;stcSpiInit.enTransMode              = SpiTransOnlySend;stcSpiInit.enCommAutoSuspendEn      = Disable;stcSpiInit.enModeFaultErrorDetectEn = Disable;stcSpiInit.enParitySelfDetectEn     = Disable;stcSpiInit.enParityEn               = Disable;stcSpiInit.enParity                 = SpiParityEven;stcSpiInit.enMasterSlaveMode = SpiModeMaster;stcSpiInit.stcDelayConfig.enSsSetupDelayOption   = SpiSsSetupDelayCustomValue;stcSpiInit.stcDelayConfig.enSsSetupDelayTime     = SpiSsSetupDelaySck1;stcSpiInit.stcDelayConfig.enSsHoldDelayOption    = SpiSsHoldDelayCustomValue;stcSpiInit.stcDelayConfig.enSsHoldDelayTime      = SpiSsHoldDelaySck1;stcSpiInit.stcDelayConfig.enSsIntervalTimeOption = SpiSsIntervalCustomValue;stcSpiInit.stcDelayConfig.enSsIntervalTime       = SpiSsIntervalSck1PlusPck2;SPI_Init(SPI3_UNIT, &stcSpiInit);spi3_dma_config();rt_sem_init(&spi3_tx_wait, "spi3tx", 0, RT_IPC_FLAG_FIFO);
}static void lcd_spi_send(uint8_t dat)
{ SPI_Cmd(SPI3_UNIT, Enable);  while (Reset == SPI_GetFlag(SPI3_UNIT, SpiFlagSendBufferEmpty)){;}SPI_SendData8(SPI3_UNIT, dat);while (Reset == SPI_GetFlag(SPI3_UNIT, SpiFlagSpiIdle)){;}SPI_Cmd(SPI3_UNIT, Disable);
}static void lcd_spi_trans(uint8_t *dat, uint16_t len)
{DMA_SetSrcAddress (SPI3_DMA_UNIT, SPI3_DMA_TX_CHANNEL, (uint32_t)dat);DMA_SetTransferCnt(SPI3_DMA_UNIT, SPI3_DMA_TX_CHANNEL, len);LCD_A0_H;LCD_CS_L;/* Enable DMA channel */DMA_ChannelCmd(SPI3_DMA_UNIT, SPI3_DMA_TX_CHANNEL, Enable);/* Enable SPI to start DMA */SPI_Cmd(SPI3_UNIT, Enable);   rt_sem_take(&spi3_tx_wait, RT_WAITING_FOREVER);LCD_CS_H;/* Disable SPI */SPI_Cmd(SPI3_UNIT, Disable);DMA_ChannelCmd(SPI3_DMA_UNIT, SPI3_DMA_TX_CHANNEL, Disable);
}static void delayms(uint16_t ms)
{rt_thread_delay(ms);
}static void write_codetable(lcd_code_t *code, uint32_t count)
{lcd_code_t *pcode = code;//传输指令和参数for (uint32_t i = 0; i < count; i++){   if (pcode->reg == LCDCODE_REGFLAG_END){                                   //结束跳出break;}else if (pcode->reg == LCDCODE_REGFLAG_DELAY){                                   //延时MSdelayms(pcode->len);}else{                                   //常规发送指令LCD_A0_L;LCD_CS_L;lcd_spi_send(pcode->reg);for (uint32_t j = 0; j < pcode->len; j++){LCD_A0_H;lcd_spi_send(pcode->dat[j]);}LCD_CS_H;}pcode++;                            //下一个寄存器}
}//初始化指令表
static lcd_code_t st7789v_initcode[] = {
{0x11,  0, {0x00} },
{LCDCODE_REGFLAG_DELAY, 120, {0x00}},
{0xb2,  5, {0x0c, 0x0c, 0x00, 0x33, 0x33} },
{0xb7,  1, {0x35} },
{0xbb,  1, {0x35} },
{0xc0,  1, {0x2c} },
{0xc2,  1, {0x01} },
{0xc3,  1, {0x0b} },
{0xc4,  1, {0x20} },
{0xc6,  1, {0x0f} },
{0xd0,  2, {0xa4, 0xa1} },
{0xe0, 14, {0xd0, 0x00, 0x02, 0x07, 0x0b, 0x1a, 0x32, 0x54, 0x40, 0x29, 0x12, 0x12, 0x12, 0x17} },
{0xe1, 14, {0xd0, 0x00, 0x02, 0x07, 0x05, 0x25, 0x2d, 0x44, 0x45, 0x1c, 0x18, 0x16, 0x1c, 0x1d} },
{0x36,  1, {0x00} },
{0x3a,  1, {0x05} },
{0x21,  0, {0x00} },
{0x29,  0, {0x00} },
{LCDCODE_REGFLAG_END, 0x00, {0x00} }
};/*显示区域设置*/
static lcd_code_t st7789v_blockcode[] = {
{0x2a,  4, {0x00, 0x00, 0x00, 0x00} },
{0x2b,  4, {0x00, 0x00, 0x00, 0x00} },
{0x2c,  0, {0x00} },
{LCDCODE_REGFLAG_END, 0x00, {0x00} }
};static void write_block(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1)
{st7789v_blockcode[0].dat[0] = 0x00;st7789v_blockcode[0].dat[1] = x0;st7789v_blockcode[0].dat[2] = 0x00;st7789v_blockcode[0].dat[3] = x1;st7789v_blockcode[1].dat[0] = y0 >> 8;st7789v_blockcode[1].dat[1] = y0 & 0xff;st7789v_blockcode[1].dat[2] = y1 >> 8;st7789v_blockcode[1].dat[3] = y1 & 0xff;write_codetable(st7789v_blockcode, 3);
}void st7789v_init(void)
{stc_port_init_t stcPortInit;MEM_ZERO_STRUCT(stcPortInit);PWC_Fcg1PeriphClockCmd(SPI3_UNIT_CLOCK, Enable);/* Configuration SPI pin */PORT_SetFunc(SPI3_NSS_PORT, SPI3_NSS_PIN, Func_Gpio,     Disable);    PORT_SetFunc(SPI3_SCK_PORT, SPI3_SCK_PIN, SPI3_SCK_FUNC, Disable);PORT_SetFunc(SPI3_SDI_PORT, SPI3_SDI_PIN, SPI3_SDI_FUNC, Disable);PORT_SetFunc(LCD_RST_PORT,  LCD_RST_PIN,  Func_Gpio,     Disable);PORT_SetFunc(LCD_A0_PORT,   LCD_A0_PIN,   Func_Gpio,     Disable);stcPortInit.enPinMode = Pin_Mode_Out;stcPortInit.enPinDrv  = Pin_Drv_H;PORT_Init(LCD_RST_PORT, LCD_RST_PIN, &stcPortInit);PORT_Init(LCD_A0_PORT,  LCD_A0_PIN,  &stcPortInit);PORT_Init(LCD_CS_PORT,  LCD_CS_PIN,  &stcPortInit);bsp_spi3_init();LCD_RST_H;LCD_A0_H;LCD_CS_H;delayms(10);LCD_RST_L;delayms(10);LCD_RST_H;delayms(120);write_codetable(st7789v_initcode, sizeof(st7789v_initcode)/sizeof(lcd_code_t));
}void st7789v_test(void)
{LCD_RST_H;LCD_A0_H;LCD_CS_H;delayms(10);LCD_RST_L;delayms(10);LCD_RST_H;delayms(120);// write_codetable(st7789v_initcode, sizeof(st7789v_initcode)/sizeof(lcd_code_t));delayms(10);//write_block(1, 1, 128, 300);
}void st7789v_disp_pic(uint8_t *dat, uint16_t x, uint16_t y, uint16_t width, uint16_t height)
{uint32_t len, n;uint8_t *ptr = dat;len = width * 2 * height;write_block(x, y, x + width - 1, y + height - 1);while (len > 0){n = (len >= 60000)?(60000):(len);lcd_spi_trans(ptr, n);ptr += n;len -= n;}
}

二、测试代码


#include "rtthread.h"
#include "board.h"void st7789v_disp_pic(uint8_t *dat, uint16_t x, uint16_t y, uint16_t width, uint16_t height);extern const unsigned char gImage_pic1[];
extern const unsigned char gImage_pic2[];static void test_entry(void* parameter)
{ st7789v_init();while (1){st7789v_disp_pic((uint8_t *)gImage_pic1, 0, 0, 240, 320);rt_thread_delay(1000);st7789v_disp_pic((uint8_t *)gImage_pic2, 0, 0, 240, 320);rt_thread_delay(1000);}
}static int test_init(void)
{rt_thread_t th = rt_thread_create("test", test_entry, RT_NULL, 1024, 10, 50);if (th != RT_NULL)rt_thread_startup(th);return 0;
}INIT_APP_EXPORT(test_init);

三、实测效果

一次刷图耗时35ms，刷图时候丝毫不会影响跑马灯的显示，说明DMA还是蛮好用的

HC32F460 SPI DMA TFT

HC32F460 SPI DMA 驱动 TFT显示屏相关推荐

小熊派 FreeRTOS+SPI+DMA 驱动 TFT-LCD
文章目录小熊派 FreeRTOS+SPI+DMA 驱动 TFT-LCD 一.文章前言二.SPI+DMA 配置三.FreeRTOS 配置四.代码编写五.实验现象小熊派 FreeRTOS+SP ...
[SPI+DMA] 驱动WS2812B显示时钟
[SPI+DMA] 驱动WS2812B显示时钟实现原理本人一个大学萌新,偶然间发现RGB时钟这神奇的玩意,就想试试.目前初步实现时钟显示,第一次写博客,只是为了记录自己的学习成果方便以后查看,大家 ...
【STM32】基于STM32CubeIDE SPI+DMA驱动WS2812
[STM32]基于STM32CubeIDE SPI+DMA驱动WS2812 ✨申明:本文章仅发表在CSDN网站,任何其他网见此内容均为盗链和爬取,请多多尊重和支持原创!
STM32 SPI+DMA 驱动 SRAM LY68L6400SLIT 应用笔记
关键词:库函数,STM32F407,SPI+DMA ,SPI-DMA,SRAM , LY68L6400SLIT,STM32CubeMX 编辑:大黄蜂说明:本笔记记录基于 STM32F407 + ...
STM32 SPI+DMA驱动WS2812
[举报再看养成习惯,噢不对,点赞再看养成习惯.感谢支持] 开头不多叨叨,直接进入主题: WS2812的驱动原理: 首先明白高低电平的表示方法: 低电平(0 code): 0.35us的高电平+0.8 ...
基于MT7688 原厂SDK 使用SPI控制器驱动TFT屏幕ILI9225驱动器(spi接口)
以下是我的一个利用SPI控制器操作屏的一个操作实例包含一个bpeer_tft.c 和一个bpeer_tft.h 这是我基于flash驱动剥离出来的spi控制器驱动好的话,顶起来~~~~~~~~~~ ...
基于STM32F411使用SPI+DMA驱动LCD
先看效果 F411CE 硬件SPI+DMA驱动LCD 基于HAL库其实HAL库我用不太习惯,一直也是用的标准库但HAL库确实是好上手一些,就迅速创建一个新的template 这次就当尝试一下吧,因 ...
[HAL]STM32 SPI+DMA驱动WS2812
该程序是纯手敲,非Cube生成!所有代码均注释. 源码在文章后面获取 WS2818 简介 Keyword: 单线通讯.归零码.Reset.RGB顺序 RGB一共有24bit位 ->相当于驱动一个 ...
嵌入式开发-STM32硬件SPI驱动TFT屏
嵌入式开发-STM32硬件SPI驱动TFT屏这次用到的TFT屏 CubeMX设置代码编写增加的内容需要注意问题代码下载这次用到的TFT屏现在的TFT屏幕已经很便宜了,65536色屏幕,2 ...
Arduino与Proteus仿真实例-TFT显示屏(ILI9341驱动器)SPI驱动仿真
TFT显示屏(ILI9341驱动器)SPI驱动仿真薄膜晶体管液晶显示器 (TFT LCD) 是一种利用薄膜晶体管技术来提高对比度和可寻址性等品质的液晶显示器 (LCD). TFT 技术意味着使用单独 ...

HC32F460 SPI DMA 驱动 TFT显示屏

HC32F460 SPI DMA 驱动 TFT显示屏

前言

一、驱动代码

二、测试代码

三、实测效果

HC32F460 SPI DMA 驱动 TFT显示屏相关推荐

最新文章

热门文章