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nRF52笔记（26）QSPI接口液晶显示屏
1 平台条件
硬件：nrf52840
软件：sdk17.02 QSPI概述
QSPI 外设支持使用 SPI 与外部闪存设备进行通信
此处列出了 QSPI 外设的主要特性：
• 单/双/四通道 SPI 输入/输出
• 2–32 MHz 可配置时钟频率
• 从/到外部闪存的单字读/写访问
• 用于块读写传输的 EasyDMA
• 高达 16 MB/秒的 EasyDMA 读取速率
• 就地执行 (XIP)，用于直接从外部闪存执行程序
在 Nordic nRF52/nRF53 系列上，QSPI 可以支持两种不同的模式。Flash / XIP操作（需要遵循flash协议）
发送自定义指令（限制使用QSPI上的1-wire发送数据）。在指令集上，它支持与外部闪存设备的操作码。
1.1 用于 LCD 的 QSPI 接口
基本上，QSPI 接口有 6 个 GPIO 引脚。
使用屏幕： hannstar 360×360 with GalaxyCore Controller resolution for testing.2 代码设置
2.1 初始化
初始化 QSPI 模块
将所有 6 个 GPIO 引脚配置为高驱动输出。#define LCD_QSPI_RESET_PIN NRF_GPIO_PIN_MAP(0,27) #define LCD_QSPI_CSN_PIN NRF_GPIO_PIN_MAP(0,26) #define LCD_QSPI_SCK_PIN NRF_GPIO_PIN_MAP(0,02) #define LCD_QSPI_IO0_PIN NRF_GPIO_PIN_MAP(1,15) #define LCD_QSPI_IO1_PIN NRF_GPIO_PIN_MAP(1,14) #define LCD_QSPI_IO2_PIN NRF_GPIO_PIN_MAP(1,13) #define LCD_QSPI_IO3_PIN NRF_GPIO_PIN_MAP(1,12) static void config_qspi_pin_high_drive(void) { nrf_gpio_cfg( LCD_QSPI_SCK_PIN, NRF_GPIO_PIN_DIR_INPUT, NRF_GPIO_PIN_INPUT_CONNECT, NRF_GPIO_PIN_PULLDOWN, NRF_GPIO_PIN_H0H1, NRF_GPIO_PIN_SENSE_HIGH); nrf_gpio_cfg( LCD_QSPI_CSN_PIN, NRF_GPIO_PIN_DIR_INPUT, NRF_GPIO_PIN_INPUT_DISCONNECT, NRF_GPIO_PIN_NOPULL, NRF_GPIO_PIN_H0H1, NRF_GPIO_PIN_NOSENSE); nrf_gpio_cfg( LCD_QSPI_IO0_PIN, NRF_GPIO_PIN_DIR_INPUT, NRF_GPIO_PIN_INPUT_DISCONNECT, NRF_GPIO_PIN_PULLDOWN, NRF_GPIO_PIN_H0H1, NRF_GPIO_PIN_NOSENSE); nrf_gpio_cfg( LCD_QSPI_IO1_PIN, NRF_GPIO_PIN_DIR_INPUT, NRF_GPIO_PIN_INPUT_DISCONNECT, NRF_GPIO_PIN_PULLDOWN, NRF_GPIO_PIN_H0H1, NRF_GPIO_PIN_NOSENSE); nrf_gpio_cfg( LCD_QSPI_IO2_PIN, NRF_GPIO_PIN_DIR_INPUT, NRF_GPIO_PIN_INPUT_DISCONNECT, NRF_GPIO_PIN_PULLDOWN, NRF_GPIO_PIN_H0H1, NRF_GPIO_PIN_NOSENSE); nrf_gpio_cfg( LCD_QSPI_IO3_PIN, NRF_GPIO_PIN_DIR_INPUT, NRF_GPIO_PIN_INPUT_DISCONNECT, NRF_GPIO_PIN_PULLDOWN, NRF_GPIO_PIN_H0H1, NRF_GPIO_PIN_NOSENSE); }- 1
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LCD demo 320×240 @ nRF52840 之后，我想描述如何使用 QSPI 接口驱动更大的 LCD 显示器，例如 360 x 360 分辨率 @ nRF52840。
QSPI 四路串行外设接口
QSPI 外设支持使用 SPI 与外部闪存设备进行通信。此处列出了 QSPI 外设的主要特性：
• 单/双/四通道 SPI 输入/输出
• 2–32 MHz 可配置时钟频率
• 从/到外部闪存的单字读/写访问
• 用于块读写传输的 EasyDMA
• 高达 16 MB/秒的 EasyDMA 读取速率
• 就地执行 (XIP)，用于直接从外部闪存执行程序在 Nordic nRF52/nRF53 系列上，QSPI 可以支持两种不同的模式。
Flash / XIP操作（需要遵循flash协议）
发送自定义指令（限制使用QSPI上的1-wire发送数据）。
在指令集上，它支持与外部闪存设备的操作码。用于 LCD 的 QSPI 接口
基本上，QSPI 接口有 6 个 GPIO 引脚。在这篇博客中，我将使用显示器制造商的瀚宇360×360 和GalaxyCore Controller 分辨率进行测试。
初始化 QSPI 模块
将所有 6 个 GPIO 引脚配置为高驱动输出。#define LCD_QSPI_RESET_PIN NRF_GPIO_PIN_MAP(0,27) #define LCD_QSPI_CSN_PIN NRF_GPIO_PIN_MAP(0,26) #define LCD_QSPI_SCK_PIN NRF_GPIO_PIN_MAP(0,02) #define LCD_QSPI_IO0_PIN NRF_GPIO_PIN_MAP(1,15) #define LCD_QSPI_IO1_PIN NRF_GPIO_PIN_MAP(1,14) #define LCD_QSPI_IO2_PIN NRF_GPIO_PIN_MAP(1,13) #define LCD_QSPI_IO3_PIN NRF_GPIO_PIN_MAP(1,12) static void config_qspi_pin_high_drive(void) { nrf_gpio_cfg( LCD_QSPI_SCK_PIN, NRF_GPIO_PIN_DIR_INPUT, NRF_GPIO_PIN_INPUT_CONNECT, NRF_GPIO_PIN_PULLDOWN, NRF_GPIO_PIN_H0H1, NRF_GPIO_PIN_SENSE_HIGH); nrf_gpio_cfg( LCD_QSPI_CSN_PIN, NRF_GPIO_PIN_DIR_INPUT, NRF_GPIO_PIN_INPUT_DISCONNECT, NRF_GPIO_PIN_NOPULL, NRF_GPIO_PIN_H0H1, NRF_GPIO_PIN_NOSENSE); nrf_gpio_cfg( LCD_QSPI_IO0_PIN, NRF_GPIO_PIN_DIR_INPUT, NRF_GPIO_PIN_INPUT_DISCONNECT, NRF_GPIO_PIN_PULLDOWN, NRF_GPIO_PIN_H0H1, NRF_GPIO_PIN_NOSENSE); nrf_gpio_cfg( LCD_QSPI_IO1_PIN, NRF_GPIO_PIN_DIR_INPUT, NRF_GPIO_PIN_INPUT_DISCONNECT, NRF_GPIO_PIN_PULLDOWN, NRF_GPIO_PIN_H0H1, NRF_GPIO_PIN_NOSENSE); nrf_gpio_cfg( LCD_QSPI_IO2_PIN, NRF_GPIO_PIN_DIR_INPUT, NRF_GPIO_PIN_INPUT_DISCONNECT, NRF_GPIO_PIN_PULLDOWN, NRF_GPIO_PIN_H0H1, NRF_GPIO_PIN_NOSENSE); nrf_gpio_cfg( LCD_QSPI_IO3_PIN, NRF_GPIO_PIN_DIR_INPUT, NRF_GPIO_PIN_INPUT_DISCONNECT, NRF_GPIO_PIN_PULLDOWN, NRF_GPIO_PIN_H0H1, NRF_GPIO_PIN_NOSENSE); }- 1
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初始化 QSPI 模块并将其配置为 24 位地址/32MHz 时钟。
void qspi_lcd_GC9c01_init(void) { if (!m_is_qspi_init) { uint32_t err_code; nrf_drv_qspi_config_t qspi_lcd_config = NRF_DRV_QSPI_DEFAULT_CONFIG; //config.phy_if.sck_freq = NRF_QSPI_FREQ_32MDIV1; //NRF_QSPI_FREQ_32MDIV8; //32MHz qspi_lcd_config.phy_if.sck_freq = NRF_QSPI_FREQ_32MDIV1; //NRF_QSPI_FREQ_32MDIV8; //32MHz //qspi_lcd_config.phy_if.sck_freq = NRF_QSPI_FREQ_32MDIV8;//NRF_QSPI_FREQ_32MDIV8; //8MHz qspi_lcd_config.pins.csn_pin = LCD_QSPI_CSN_PIN; qspi_lcd_config.pins.sck_pin = LCD_QSPI_SCK_PIN; qspi_lcd_config.pins.io0_pin = LCD_QSPI_IO0_PIN; qspi_lcd_config.pins.io1_pin = LCD_QSPI_IO1_PIN; qspi_lcd_config.pins.io2_pin = LCD_QSPI_IO2_PIN; qspi_lcd_config.pins.io3_pin = LCD_QSPI_IO3_PIN; err_code = nrf_drv_qspi_init(&qspi_lcd_config, qspi_lcd_handler, NULL); APP_ERROR_CHECK(err_code); NRF_LOG_INFO("QSPI LCD Init"); NRF_QSPI->IFCONFIG0 |= (QSPI_IFCONFIG0_PPSIZE_512Bytes << QSPI_IFCONFIG0_PPSIZE_Pos); m_is_qspi_init = true; } else { NRF_LOG_ERROR("QSPI LCD has already initialized!"); APP_ERROR_CHECK(-1); } }- 1
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2.2 读写操作
基本上，LCD 上有 2 个操作。
LCD 命令代码（例如 LCD 初始化代码）。
LCD Data write（将数据写入LCD屏）。（1）LCD命令模式
（2）LCD写命令static uint32_t drv_GC9c01_bus_writeCmd(const uint8_t cmd) { return send_qspi_cinstr_w0d(cmd); } static uint32_t drv_GC9c01_bus_writeCmdByte(const uint8_t cmd, const uint8_t data) { uint32_t err_code = NRF_SUCCESS; err_code = send_qspi_cinstr_w1d(cmd, data); return err_code; }- 1
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（3）LCD初始化代码
static void configure_lcd() { drv_GC9c01_bus_writeCmd(0xfe); drv_GC9c01_bus_writeCmd(0xef); drv_GC9c01_bus_writeCmdByte(0x80, 0x11); drv_GC9c01_bus_writeCmdByte(0x81, 0x70); drv_GC9c01_bus_writeCmdByte(0x82, 0x09); drv_GC9c01_bus_writeCmdByte(0x83, 0x03); drv_GC9c01_bus_writeCmdByte(0x84, 0x20); drv_GC9c01_bus_writeCmdByte(0x85, 0x42); drv_GC9c01_bus_writeCmdByte(0x86, 0xfc); drv_GC9c01_bus_writeCmdByte(0x87, 0x09); drv_GC9c01_bus_writeCmdByte(0x89, 0x10); drv_GC9c01_bus_writeCmdByte(0x8a, 0x4f); drv_GC9c01_bus_writeCmdByte(0x8c, 0x59); drv_GC9c01_bus_writeCmdByte(0x8d, 0x51); drv_GC9c01_bus_writeCmdByte(0x8e, 0xae); drv_GC9c01_bus_writeCmdByte(0x8f, 0xf3); drv_GC9c01_bus_writeCmdByte(0x36, 0x00); drv_GC9c01_bus_writeCmdByte(0x3a, 0x05); drv_GC9c01_bus_writeCmdByte(0xec, 0x77); uint8_t parmater1_buffer[] = {0x01, 0x80, 0x00, 0x00, 0x00, 0x00}; send_qspi_cinstr_long_frame_word(0x74, parmater1_buffer, 6); drv_GC9c01_bus_writeCmdByte(0x98, 0x3e); drv_GC9c01_bus_writeCmdByte(0x99, 0x3e); drv_GC9c01_bus_writeCmdByte(0xc3, 0x2A); drv_GC9c01_bus_writeCmdByte(0xc4, 0x18); send_qspi_cinstr_w1d_2data(0xa1,0x01,0x04); send_qspi_cinstr_w1d_2data(0xa2,0x01,0x04); drv_GC9c01_bus_writeCmdByte(0xa9, 0x1c); send_qspi_cinstr_w1d_2data(0xa5,0x11,0x09); drv_GC9c01_bus_writeCmdByte(0xb9, 0x8a); drv_GC9c01_bus_writeCmdByte(0xa8, 0x5e); drv_GC9c01_bus_writeCmdByte(0xa7, 0x40); drv_GC9c01_bus_writeCmdByte(0xaf, 0x73); drv_GC9c01_bus_writeCmdByte(0xae, 0x44); drv_GC9c01_bus_writeCmdByte(0xad, 0x38); drv_GC9c01_bus_writeCmdByte(0xa3, 0x5d); drv_GC9c01_bus_writeCmdByte(0xc2, 0x02); drv_GC9c01_bus_writeCmdByte(0xc5, 0x11); drv_GC9c01_bus_writeCmdByte(0xc6, 0x0e); drv_GC9c01_bus_writeCmdByte(0xc7, 0x13); drv_GC9c01_bus_writeCmdByte(0xc8, 0x0d); drv_GC9c01_bus_writeCmdByte(0xcb, 0x02); send_qspi_cinstr_w1d_2data(0x7c,0xb6,0x26); drv_GC9c01_bus_writeCmdByte(0xac, 0x24); drv_GC9c01_bus_writeCmdByte(0xf6, 0x80); send_qspi_cinstr_w1d_2data(0xb5,0x09,0x09); send_qspi_cinstr_w1d_4data(0x60, 0x38,0x0b,0x5b,0x56); send_qspi_cinstr_w1d_4data(0x63, 0x3a,0xe0,0x5b,0x56); uint8_t parmater2_buffer[] = {0x38, 0x0d, 0x72, 0xdd, 0x5b, 0x56}; send_qspi_cinstr_long_frame_word(0x64, parmater2_buffer, 6); uint8_t parmater3_buffer[] = {0x38, 0x11, 0x72, 0xe1, 0x5b, 0x56}; send_qspi_cinstr_long_frame_word(0x66, parmater3_buffer, 6); uint8_t parmater4_buffer[] = {0x3b, 0x08, 0x08, 0x00, 0x08, 0x29,0x5b}; send_qspi_cinstr_long_frame_word(0x68, parmater4_buffer, 7); uint8_t parmater5_buffer[] = {0x00,0x00,0x00,0x07,0x01,0x13,0x11,0x0b, \ 0x09,0x16,0x15,0x1d,0x1e,0x00,0x00,0x00, \ 0x00,0x00,0x00,0x1e,0x1d,0x15,0x16,0x0a, \ 0x0c,0x12,0x14,0x02,0x08,0x00,0x00,0x00}; send_qspi_cinstr_long_frame_word(0x6e, parmater5_buffer, 32); drv_GC9c01_bus_writeCmdByte(0xbe, 0x11); uint8_t parmater6_buffer[] = {0xcc, 0x0c, 0xcc, 0x84, 0xcc, 0x04,0x50}; send_qspi_cinstr_long_frame_word(0x6c, parmater6_buffer, 7); drv_GC9c01_bus_writeCmdByte(0x7d, 0x72); drv_GC9c01_bus_writeCmdByte(0x7e, 0x38); uint8_t parmater7_buffer[] = {0x02,0x03,0x09,0x05,0x0c,0x06,0x09,0x05,0x0c,0x06}; send_qspi_cinstr_long_frame_word(0x70, parmater7_buffer, 10); send_qspi_cinstr_w1d_4data(0x90, 0x06,0x06,0x05,0x06); send_qspi_cinstr_w1d_3data(0x93, 0x45,0xff,0x00); uint8_t parmater8_buffer[] = {0x45, 0x09, 0x08, 0x08, 0x26, 0x2a}; send_qspi_cinstr_long_frame_word(0xf0, parmater8_buffer, 6); uint8_t parmater9_buffer[] = {0x43, 0x70, 0x72, 0x36, 0x37, 0x6f}; send_qspi_cinstr_long_frame_word(0xf1, parmater9_buffer, 6); uint8_t parmater10_buffer[] = {0x45, 0x09, 0x08, 0x08, 0x26, 0x2a}; send_qspi_cinstr_long_frame_word(0xf2, parmater10_buffer, 6); uint8_t parmater11_buffer[] = {0x43, 0x70, 0x72, 0x36, 0x37, 0x6f}; send_qspi_cinstr_long_frame_word(0xf3, parmater11_buffer, 6); drv_GC9c01_bus_writeCmd(0xfe); drv_GC9c01_bus_writeCmd(0xee); // User Command Set (UCS = CMD1)------------------------------------------ // drv_GC9c01_bus_writeCmdByte(GC9c01_CMD_WRITE_CMD_MODE_PAGE, 0x00); //tearing effect line on-------------------------------------------------- // drv_GC9c01_bus_writeCmdByte(GC9c01_CMD_TEARING_EFFECT_ON, 0x00); // Interface Pixel Format------------------------------------------------- // drv_GC9c01_bus_writeCmdByte(GC9c01_CMD_INTERFACE_PIXEL_FORMAT, 0x55);// 0x55 -> 565 // Set_DSPI Mode---------------------------------------------------------- // drv_GC9c01_bus_writeCmdByte(GC9c01_CMD_SET_DSPI_MODE, 0x80); // Write display brightness----------------------------------------------- //GC9c01_drv_SetBrightness(0xCC); // Sleep-out and Display on----------------------------------------------- GC9c01_DRV_SLEEP_OUT(); nrf_delay_ms(120); GC9c01_DRV_DISPLAY_ON(); nrf_delay_ms(20); GC9c01_drv_setColRowPosition(0, 0); NRF_LOG_INFO("After %s", __func__); }- 1
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2.3 写入 LCD 数据
它使用 Opcode = 0x32 PP4O 来写入 LCD 数据。
static uint32_t gc9c01_bus_lcd_write_buffer(uint8_t *p_tx_buffer, uint32_t len, uint32_t addr) { uint32_t err_code = 0; m_finished = false; err_code = nrf_drv_qspi_write(p_tx_buffer, len, addr); if(err_code != NRFX_SUCCESS) { // NRF_LOG_INFO("error code= 0x%x",err_code); } WAIT_FOR_PERIPH(); return err_code; } static void BMP_picture_show(uint32_t delay, const uint16_t *p_data) { uint32_t err_code; uint32_t * p_color; uint32_t i,k; uint32_t tran_size,now_size=0; uint32_t remain_size = GC9c01_DRV_ALL_SIZE; //NRF_LOG_INFO("%s block_dx = %d, Color=%04x", __func__, a block_dx, color); //static uint8_t __ALIGN(4) bank_buf[QSPI_PAG_SIZE]; tran_size = QSPI_PAG_SIZE; memcpy(&m_buffer_tx[0], (uint8_t *)&p_data[0]+tran_size, tran_size); err_code = gc9c01_bus_lcd_write_buffer(m_buffer_tx, QSPI_PAG_SIZE, 0x002C00); remain_size -= tran_size; now_size=tran_size; while (remain_size) { if (remain_size > QSPI_PAG_SIZE) { tran_size = QSPI_PAG_SIZE; } else { tran_size = remain_size; } memcpy(m_buffer_tx, (uint8_t *)&p_data[0]+now_size, tran_size); now_size += tran_size; err_code = gc9c01_bus_lcd_write_buffer(&m_buffer_tx[0], tran_size, 0x003C00); remain_size -= tran_size; } nrf_delay_ms(delay); }- 1
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效果展示
参考链接访问地址
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- 原文地址：https://blog.csdn.net/zhi_Alanwu/article/details/128127421