AT32 — 外部存储控制器 (XMC) on CLing

AT32 XMC — 16 位并口 LCD + 触摸

Tue, 08 Sep 2026 14:52:21 +0800

XMC — 16 位并口 LCD + 触摸

固件库: AT32F403A_407_Firmware_Library V2.2.2
芯片: AT32
源文件: AT32/AT32F403A_407_Firmware_Library_V2.2.2/project/at_start_f403a/examples/xmc/lcd_touch_16bit/src/main.c

功能简介

本示例演示外部存储控制器。XMC/EXMC 可以连接并口 LCD、NAND Flash、SRAM 等外部总线设备，实现高速数据传输。

完整代码

#include "at32f403a_407_board.h"
#include "at32f403a_407_clock.h"
#include "xmc_lcd.h"
#include "touch.h"

int main(void)
{
  touch_struct = &touch_dev_struct;
  lcd_struct = &lcd_dev_struct;
  system_clock_config();

  at32_board_init();

  /* get system clock */
  crm_clocks_freq_get(&crm_clocks_freq_struct);

  /* turn led2/led3/led4 on */
  at32_led_on(LED2);
  at32_led_on(LED3);
  at32_led_on(LED4);

  lcd_struct->lcd_init();
  point_color = GREEN;
  lcd_struct->lcd_clear(point_color);

  touch_struct->init();

  while(1)
  {
    touch_struct->touch_scan();
  }
}

代码讲解

系统时钟初始化：配置 MCU 的主频和时钟树。不同芯片的时钟配置不同，一般由工具生成。

板级初始化：初始化开发板上的 LED、按键等基础外设。

AT32 XMC — 8 位并口 LCD

Tue, 08 Sep 2026 14:52:21 +0800

XMC — 8 位并口 LCD

固件库: AT32F403A_407_Firmware_Library V2.2.2
芯片: AT32
源文件: AT32/AT32F403A_407_Firmware_Library_V2.2.2/project/at_start_f403a/examples/xmc/lcd_8bit/src/main.c

功能简介

本示例演示外部存储控制器。XMC/EXMC 可以连接并口 LCD、NAND Flash、SRAM 等外部总线设备，实现高速数据传输。

完整代码

#include "at32f403a_407_board.h"
#include "at32f403a_407_clock.h"
#include "xmc_lcd.h"

int main(void)
{
  system_clock_config();

  at32_board_init();

  /* get system clock */
  crm_clocks_freq_get(&crm_clocks_freq_struct);

  /* turn led2/led3/led4 on */
  at32_led_on(LED2);
  at32_led_on(LED3);
  at32_led_on(LED4);

  /* configures xmc&lcd */
  lcd_init();

  /* clear the lcd */
  point_color = WHITE;
  lcd_clear(point_color);

  while(1)
  {
    /* display number on lcd */
    lcd_display_number();
  }
}

代码讲解

系统时钟初始化：配置 MCU 的主频和时钟树。不同芯片的时钟配置不同，一般由工具生成。

板级初始化：初始化开发板上的 LED、按键等基础外设。

AT32 XMC — NAND Flash

Tue, 08 Sep 2026 14:52:21 +0800

XMC — NAND Flash

固件库: AT32F403A_407_Firmware_Library V2.2.2
芯片: AT32
源文件: AT32/AT32F403A_407_Firmware_Library_V2.2.2/project/at_start_f403a/examples/xmc/nand/ecc/src/main.c

功能简介

本示例演示外部存储控制器。XMC/EXMC 可以连接并口 LCD、NAND Flash、SRAM 等外部总线设备，实现高速数据传输。

完整代码

#include "xmc_ecc.h"
#include "at32f403a_407_board.h"
#include "at32f403a_407_clock.h"

int main(void)
{
  /* configure the system clock */
  system_clock_config();

  /* led initalization */
  at32_board_init();

  /* usart initalization */
  uart_print_init(115200);

  /* get system clock */
  crm_clocks_freq_get(&crm_clocks_freq_struct);

  /* xmc initialization */
  nand_init();

  /* nand reset command */
  nand_reset();
  delay_us(10);

  /* nand read id command */
  nand_read_id(&nand_id_struct);

  /* verify the nand id */
  /* nand support:spansion:s34ml01g100tfi003  micron:mt29f16g08cbaca  sandisk:sdtnqgama-008g  toshiba:tc58teg6ddkta00   samsung:k9gag08u0e-scb0   hynix:h27u1g8f2ctr
                  id      :0x01f1001d         id    :0x2c48044a       id     :0x45de9493      id     :0x98de9493        id     :0xecd58472        id   :0xadf1801d
  */
  if((nand_id_struct.maker_id == NAND_AT_MakerID) && (nand_id_struct.device_id == NAND_AT_DeviceID))
  {
    /* nand memory address to write to */
    write_read_addr_struct.zone  = 0x00;
    write_read_addr_struct.block = 0x00;
    write_read_addr_struct.page  = 0x00;
    write_read_addr_struct.byte  = 0x00;

    /* erase the nand first block */
    status = nand_erase_block(write_read_addr_struct);

    /* write data to xmc nand memory */
    /* fill the buffer to send */
    fill_buffer(tx_buffer, BUFFER_SIZE , 0x0);

    /* change the regular to make ecc value isn't 0 */
    tx_buffer[10]=0x03;

     /* calculate ecc value while transmiting */
    xmc_nand_ecc_enable(XMC_BANK2_NAND, TRUE);
    status = nand_write_small_page(tx_buffer, write_read_addr_struct, page_number);

    /* save the right ecc_value (in this case ,we suppose it as the true value) */
    ecc_value_write_last = ecc_value_write;

    /* change the 85 data like there is a 1 bit error happened */
    status = nand_erase_block(write_read_addr_struct);
    tx_buffer[10]=0x23;
    status = nand_write_small_page(tx_buffer, write_read_addr_struct, page_number);

    /* calculate ecc value while transmiting */
    xmc_nand_ecc_enable(XMC_BANK2_NAND, TRUE);

    /* read back the written data */
    status = nand_read_small_page (rx_buffer, write_read_addr_struct, page_number);

    /* ecc check and correct 1 bit error */
    nand_ecc_correction(rx_buffer ,ecc_value_write_last ,ecc_value_read);

    if(rx_buffer[10]==0x03)
    {
      printf("ecc is work\r\n");
    }
    else
    {
      printf("ecc is not work\r\n");
    }
  }
  else
  {
    printf("the id is error\r\n");
  }

  while(1)
  {
  }
}

代码讲解

系统时钟初始化：配置 MCU 的主频和时钟树。不同芯片的时钟配置不同，一般由工具生成。

板级初始化：初始化开发板上的 LED、按键等基础外设。

串口初始化：配置串口波特率（这里是 115200），使能 printf 重定向。

printf 输出：通过串口打印调试信息。需要先调用 uart_print_init 完成重定向。

AT32 XMC — PSRAM 扩展

Tue, 08 Sep 2026 14:52:21 +0800

XMC — PSRAM 扩展

固件库: AT32F403A_407_Firmware_Library V2.2.2
芯片: AT32
源文件: AT32/AT32F403A_407_Firmware_Library_V2.2.2/project/at_start_f403a/examples/xmc/psram/src/main.c

功能简介

本示例演示外部存储控制器。XMC/EXMC 可以连接并口 LCD、NAND Flash、SRAM 等外部总线设备，实现高速数据传输。

完整代码

#include "at32f403a_407_board.h"
#include "at32f403a_407_clock.h"
#include "xmc_psram.h"
#define BUFFER_SIZE        0x400
#define WRITE_READ_ADDR    0x8000

代码讲解

代码结构清晰，主要包含外设初始化配置和主循环中的功能逻辑。请结合注释理解每一步的含义。