APM32F411的USB支持主机或从机模式
接下来在OTGH_MSC这个例程的基础上增加LCD显示,U盘文件扫描和TXT文件读取功能
把上个帖子的LCD驱动移植过来,由于USB占用了原来的IO,需要换一下IO才行
YUYY_HS12864G18B_DEV_Type lcd_dev;
void spi_init()
{
GPIO_Config_T GPIO_InitStructure;
SPI_Config_T SPI_InitStructure;
RCM_EnableAHB1PeriphClock (RCM_AHB1_PERIPH_GPIOC);
RCM_EnableAPB1PeriphClock(RCM_APB1_PERIPH_SPI2);
GPIO_ConfigPinAF(GPIOC, GPIO_PIN_SOURCE_3, GPIO_AF_SPI1);
GPIO_ConfigPinAF(GPIOC, GPIO_PIN_SOURCE_7, GPIO_AF_SPI1);
GPIO_ConfigStructInit(&GPIO_InitStructure);
GPIO_InitStructure.pin = GPIO_PIN_3 | GPIO_PIN_7;
GPIO_InitStructure.speed = GPIO_SPEED_100MHz;
GPIO_InitStructure.mode = GPIO_MODE_AF;
GPIO_InitStructure.otype = GPIO_OTYPE_PP;
GPIO_InitStructure.pupd = GPIO_PUPD_NOPULL;
GPIO_Config(GPIOC, &GPIO_InitStructure);
SPI_ConfigStructInit(&SPI_InitStructure);
SPI_InitStructure.direction = SPI_DIRECTION_1LINE_TX;
SPI_InitStructure.mode = SPI_MODE_MASTER;
SPI_InitStructure.length = SPI_DATA_LENGTH_8B;
SPI_InitStructure.polarity = SPI_CLKPOL_HIGH;
SPI_InitStructure.phase = SPI_CLKPHA_2EDGE;
SPI_InitStructure.nss = SPI_NSS_SOFT;
SPI_InitStructure.baudrateDiv = SPI_BAUDRATE_DIV_8;
SPI_InitStructure.firstBit = SPI_FIRSTBIT_MSB;
SPI_InitStructure.crcPolynomial = 7;
SPI_Config(SPI2, &SPI_InitStructure);
SPI_DisableCRC(SPI2);
SPI_DisableSSOutput(SPI2);
SPI_Enable(SPI2);
}
void lcd_spiwritebyte(SPI_T *spix,uint8_t byte)
{
while (SPI_I2S_ReadStatusFlag(spix, SPI_FLAG_TXBE) == RESET);
SPI_I2S_TxData(spix, byte);
}
void lcd_init()
{
GPIO_Config_T gpioConfigStruct;
RCM_EnableAHB1PeriphClock (RCM_AHB1_PERIPH_GPIOC);
GPIO_ConfigStructInit(&gpioConfigStruct);
gpioConfigStruct.mode = GPIO_MODE_OUT;
gpioConfigStruct.speed = GPIO_SPEED_100MHz;
gpioConfigStruct.pin = GPIO_PIN_4 | GPIO_PIN_5 | GPIO_PIN_6;
gpioConfigStruct.otype = GPIO_OTYPE_PP;
gpioConfigStruct.pupd = GPIO_PUPD_NOPULL;
GPIO_Config(GPIOC, &gpioConfigStruct);
lcd_dev.cs.gpio = GPIOC;
lcd_dev.cs.pin = GPIO_PIN_4;
lcd_dev.rst.gpio = GPIOC;
lcd_dev.rst.pin = GPIO_PIN_5;
lcd_dev.a0.gpio = GPIOC;
lcd_dev.a0.pin = GPIO_PIN_6;
lcd_dev.spix = SPI2;
lcd_dev.spi_sendbyte_func = (YUYY_HS12864G18B_SpiWriteByteFunc_Type)lcd_spiwritebyte;
YUYY_HS12864G18B_Init(&lcd_dev);
YUYY_HS12864G18B_ClearScreen(&lcd_dev);
YUYY_HS12864G18B_DisplayString8x16(&lcd_dev,0,0,0," APM32F411 TEST");
YUYY_HS12864G18B_DisplayString8x16(&lcd_dev,0,2,0,"TXT FILE READER");
YUYY_HS12864G18B_DisplayString8x16(&lcd_dev,0,4,0," Wait USB Dev");
YUYY_HS12864G18B_DisplayString8x16(&lcd_dev,0,6,0,"Code by yuyy1989");
YUYY_HS12864G18B_DisplayFinish(&lcd_dev);
}
实现TXT文件扫描和内容显示
#define MAX_TXT_NUM 10
char filenames[MAX_TXT_NUM][14];
uint8_t txt_num = 0;
uint8_t select_index = 0;
uint8_t filed_opened = 0;
uint8_t file_read_end = 0;
uint8_t file_buffer[80];
uint8_t file_buffer_len = 0;
char lcd_buffer[4][17];
void yuyy_show_txt()
{
uint8_t start_index = 0;
uint8_t i = 0;
YUYY_HS12864G18B_ClearScreen(&lcd_dev);
if(txt_num == 0)
{
YUYY_HS12864G18B_DisplayString8x16(&lcd_dev,0,0,0,"NO TXT FILES");
return;
}
if(!filed_opened)
{
if(txt_num > 4)
{
if(select_index == txt_num - 1 )
start_index = select_index - 3;
else if(select_index > 2 )
start_index = select_index - 2;
}
while(start_index < txt_num)
{
YUYY_HS12864G18B_DisplayString8x16(&lcd_dev,select_index == start_index?YUYY_FONT_DATAS_REVERSE:0,i*2,0,filenames[start_index]);
i += 1;
start_index += 1;
}
}
else
{
YUYY_HS12864G18B_DisplayString8x16(&lcd_dev,0,0,0,lcd_buffer[0]);
YUYY_HS12864G18B_DisplayString8x16(&lcd_dev,0,2,0,lcd_buffer[1]);
YUYY_HS12864G18B_DisplayString8x16(&lcd_dev,0,4,0,lcd_buffer[2]);
YUYY_HS12864G18B_DisplayString8x16(&lcd_dev,0,6,0,lcd_buffer[3]);
}
}
void yuyy_readbuffer_to_lcd()
{
uint8_t i = 0,j = 0,k = 0;
uint32_t len = 0;
memset(lcd_buffer,0,68);
if(file_buffer_len == 0)
{
f_lseek(&file,0);
file_read_end = 0;
file_buffer_len = 0;
}
if(!file_read_end && file_buffer_len < 80)
{
if(f_read(&file, &file_buffer[file_buffer_len], 80-file_buffer_len, &len) == FR_OK)
{
if(len == 0 || len < 80-file_buffer_len)
{
file_read_end = 1;
}
file_buffer_len += len;
}
}
while(j < 4)
{
i = 0;
while(i < 16 && k < file_buffer_len)
{
if(file_buffer[k]>0x19 && file_buffer[k] < 0x7F)
{
lcd_buffer[j][i] = file_buffer[k];
i += 1;
}
else if(file_buffer[k] == '\n' && i > 0)
{
i = 16;
}
k += 1;
}
j += 1;
}
i = 0;
j = k;
while(i < k && j < 80)
{
file_buffer[i] = file_buffer[j];
i += 1;
j += 1;
}
file_buffer_len -= k;
}
void yuyy_file_index_change()
{
if(!filed_opened)
{
select_index += 1;
if(txt_num > 0 && select_index > txt_num - 1)
select_index = 0;
yuyy_show_txt();
}
else
{
yuyy_readbuffer_to_lcd();
yuyy_show_txt();
}
}
void yuyy_file_open_back()
{
if(txt_num == 0)
return;
if(!filed_opened)
{
if(f_open(&file, filenames[select_index], FA_READ) == FR_OK)
{
filed_opened = 1;
memset(file_buffer,0,80);
yuyy_readbuffer_to_lcd();
yuyy_show_txt();
}
}
else
{
if(f_close(&file) == FR_OK)
{
filed_opened = 0;
file_read_end = 0;
file_buffer_len = 0;
yuyy_show_txt();
}
}
}
void yuyy_scantxt()
{
uint8_t len,i;
FRESULT res;
FILINFO fileinfo;
DIR dir;
res=f_opendir(&dir,"/");
if(res != FR_OK)
return;
memset(filenames,0,MAX_TXT_NUM*14);
txt_num = 0;
while(1)
{
char* pstr;
res = f_readdir(&dir, &fileinfo);
if (res != FR_OK || fileinfo.fname[0] == 0 || txt_num == MAX_TXT_NUM)
break;
if(fileinfo.fattrib&AM_DIR)
continue;
len = strlen(fileinfo.fname);
if(len > 4 && strncasecmp(&fileinfo.fname[len-4],".TXT",4) == 0)
memcpy(filenames[txt_num++],fileinfo.fname,13);
}
i = 0;
while(i < txt_num)
{
printf("%d: %s",i,filenames[i]);
i++;
}
}
改写USB_HostUserApplication这个方法
void USB_HostUserApplication(void)
{
uint8_t status = gUsbHostAppStatus;
static uint8_t userAppState = USER_APP_INIT;
switch (status)
{
case USBH_APP_CONNECTION:
break;
case USBH_APP_DISCONNECTION:
userAppState = USER_APP_INIT;
YUYY_HS12864G18B_ClearScreen(&lcd_dev);
YUYY_HS12864G18B_DisplayString8x16(&lcd_dev,0,0,0," APM32F411 TEST");
YUYY_HS12864G18B_DisplayString8x16(&lcd_dev,0,2,0,"TXT FILE READER");
YUYY_HS12864G18B_DisplayString8x16(&lcd_dev,0,4,0," Wait USB Dev");
YUYY_HS12864G18B_DisplayString8x16(&lcd_dev,0,6,0,"Code by yuyy1989");
YUYY_HS12864G18B_DisplayFinish(&lcd_dev);
break;
case USBH_APP_READY:
switch (userAppState)
{
case USER_APP_INIT:
if (f_mount(&fatfs, "0:", 0) == FR_OK)
{
yuyy_scantxt();
yuyy_show_txt();
}
userAppState = USER_APP_RUN;
break;
case USER_APP_RUN:
if (!APM_PBGetState(BUTTON_KEY1))
{
YUYY_DelayMs(10);
if (!APM_PBGetState(BUTTON_KEY1))
{
yuyy_file_index_change();
while (!APM_PBGetState(BUTTON_KEY1));
}
}
if (!APM_PBGetState(BUTTON_KEY2))
{
YUYY_DelayMs(10);
if (!APM_PBGetState(BUTTON_KEY2))
{
yuyy_file_open_back();
while (!APM_PBGetState(BUTTON_KEY2));
}
}
break;
}
break;
default:
break;
}
}
作为主机使用时需要短接开发板上的J11,才能通过USB输出5V
没有插入U盘时
选择文件
打开文件查看内容
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