【搬运】使用M5Stack做一个移动的串口监视器
项目地址：https://github.com/tomorrow56/M5Stack_USB_Host_FTDI_Serial_Monitor大部分设备在调试时都使用串口进行数据查看，TFT_eSPI的示例中也有一个关于串口打印的示例，调用这个示例可以直接将RX、TX到M5Core的黑色base，但是对于一些非裸板设备或者端口有线的设备，往往在连接时有些麻烦。为此，使用USB Module可以方便的接入USB来查看数据。作者修改了库，增加FTDI的支持，代码如下#include <M5Stack.h>
#include "M5StackUpdater.h"
#include "cdcftdimod.h"
#include <usbhub.h>
#include "pgmstrings.h"
// Satisfy the IDE, which needs to see the include statment in the ino too.
#ifdef dobogusinclude
#include <spi4teensy3.h>
#endif
#include <SPI.h>
class FTDIMODAsync : public FTDIMODAsyncOper
{
public:
uint8_t OnInit(FTDIMOD *pftdi);
};
uint8_t FTDIMODAsync::OnInit(FTDIMOD *pftdi)
{
uint8_t rcode = 0;
rcode = pftdi->SetBaudRate(115200);
if (rcode)
{
ErrorMessage<uint8_t>(PSTR("SetBaudRate"), rcode);
return rcode;
}
rcode = pftdi->SetFlowControl(FTDI_SIO_DISABLE_FLOW_CTRL);
if (rcode)
ErrorMessage<uint8_t>(PSTR("SetFlowControl"), rcode);
return rcode;
}
USB Usb;
//USBHub Hub(&Usb);
FTDIMODAsync FtdiAsync;
FTDIMOD Ftdi(&Usb, &FtdiAsync);
// The scrolling area must be a integral multiple of TEXT_HEIGHT
//#define TEXT_HEIGHT 16 // Height of text to be printed and scrolled
#define TEXT_HEIGHT 10 // Height of text to be printed and scrolled
#define TOP_FIXED_AREA 14 // Number of lines in top fixed area (lines counted from top of screen)
#define BOT_FIXED_AREA 0 // Number of lines in bottom fixed area (lines counted from bottom of screen)
#define YMAX 240 // Bottom of screen area
#define LOGO_HEIGHT 16 // Height of text to be printed and scrolled
// The initial y coordinate of the top of the scrolling area
uint16_t yStart = 0;
// yArea must be a integral multiple of TEXT_HEIGHT
uint16_t yArea = YMAX-TOP_FIXED_AREA-BOT_FIXED_AREA;
// The initial y coordinate of the top of the bottom text line
// uint16_t yDraw = YMAX - BOT_FIXED_AREA - TEXT_HEIGHT;
uint16_t yDraw = 0;
// Keep track of the drawing x coordinate
uint16_t xPos = 0;
// For the byte we read from the serial port
byte data = 0;
// A few test variables used during debugging
boolean change_colour = 1;
boolean selected = 1;
// We have to blank the top line each time the display is scrolled, but this takes up to 13 milliseconds
// for a full width line, meanwhile the serial buffer may be filling... and overflowing
// We can speed up scrolling of short text lines by just blanking the character we drew
int blank; // We keep all the strings pixel lengths to optimise the speed of the top line blanking
// Use M5Stack Logo
extern const unsigned char gImage_logoM5[];
boolean InitFlag = false;
void setup()
{
// Setup the TFT display
M5.begin();
if(digitalRead(BUTTON_A_PIN) == 0) {
Serial.println("Will Load menu binary");
updateFromFS(SD);
ESP.restart();
}
// Use M5Stack Logo
M5.Lcd.pushImage(0, 0, 320, 240, (uint16_t *)gImage_logoM5);
//Serial.begin( 115200 );
#if !defined(__MIPSEL__)
while (!Serial); // Wait for serial port to connect - used on Leonardo, Teensy and other boards with built-in USB CDC serial connection
#endif
Serial.println("Start");
/*
drawString(const char *string, int poX, int poY, int font),
drawCentreString(const char *string, int dX, int poY, int font), // Deprecated, use setTextDatum() and drawString()
drawRightString(const char *string, int dX, int poY, int font),// Deprecated, use setTextDatum() and drawString()
*/
M5.Lcd.setTextColor(TFT_RED);
M5.Lcd.drawCentreString("Start", 320/2, 0, 2);
if (Usb.Init() == -1){
Serial.println("OSC did not start.");
}
//M5.Lcd.fillScreen(TFT_BLACK);
M5.Lcd.setTextColor(TFT_WHITE, TFT_BLUE);
//M5.Lcd.fillRect(0,0,320,TEXT_HEIGHT, TFT_BLUE);
M5.Lcd.fillRect(0,0,320,LOGO_HEIGHT, TFT_BLUE);
M5.Lcd.drawCentreString(" FTDI Terminal ", 320/2, 0, 2);
//delay(1000);
//M5.Lcd.fillScreen(TFT_BLACK);
// Change colour for scrolling zone text
M5.Lcd.setTextColor(TFT_WHITE, TFT_BLACK);
// Setup scroll area
// setupScrollArea(TOP_FIXED_AREA, BOT_FIXED_AREA);
setupScrollArea(0, 0);
// Zero the array
for (byte i = 0; i<18; i++){
blank=0;
}
}
void loop()
{
Usb.Task();
if( Usb.getUsbTaskState() == USB_STATE_RUNNING ){
uint8_trcode;
/* char strbuf[] = "DEADBEEF";
//char strbuf[] = "The quick brown fox jumps over the lazy dog";
//char strbuf[] = "This string contains 61 character to demonstrate FTDI buffers"; //add one symbol to it to see some garbage
// Serial.print(".");
rcode = Ftdi.SndData(strlen(strbuf), (uint8_t*)strbuf);
if (rcode){
ErrorMessage<uint8_t>(PSTR("SndData"), rcode);
}
delay(50);
*/
uint8_tbuf;
for (uint8_t i=0; i<64; i++){
buf = 0;
}
uint16_t rcvd = 64;
rcode = Ftdi.RcvData(&rcvd, buf);
if (rcode && rcode != hrNAK){
ErrorMessage<uint8_t>(PSTR("Ret"), rcode);
}
if( rcvd > 2 ) { //more than 2 bytes received
for(uint16_t i = 2; i < rcvd; i++ ) {
// Countermeasures against the loss of display of the first data
if(InitFlag == false){
xPos = 0;
yDraw = scroll_line();
scrollAddress(0);
InitFlag = true;
}
Serial.print((char)buf);
// data = (char)buf;
data = buf;
if (data > 31 && data < 128) {
xPos += M5.Lcd.drawChar(data, xPos, yDraw, 1);
// blank[(18+(yStart-TOP_FIXED_AREA)/TEXT_HEIGHT)%19]=xPos; // Keep a record of line lengths
}
if (data == '\t') {
xPos += M5.Lcd.drawChar('', xPos, yDraw, 1);
}
if (data == '\r' || xPos>311) {
xPos = 0;
yDraw = scroll_line(); // It can take 13ms to scroll and blank 16 pixel lines
}
//change_colour = 1; // Line to indicate buffer is being emptied
}
}
}
}
// ##############################################################################################
// Call this function to scroll the display one text line
// ##############################################################################################
int scroll_line() {
int yTemp = yStart; // Store the old yStart, this is where we draw the next line
// Use the record of line lengths to optimise the rectangle size we need to erase the top line
// M5.Lcd.fillRect(0,yStart,blank[(yStart-TOP_FIXED_AREA)/TEXT_HEIGHT],TEXT_HEIGHT, TFT_BLACK);
M5.Lcd.fillRect(0,yStart,320,TEXT_HEIGHT, TFT_BLACK);
// Change the top of the scroll area
yStart+=TEXT_HEIGHT;
// The value must wrap around as the screen memory is a circular buffer
// if (yStart >= YMAX - BOT_FIXED_AREA) yStart = TOP_FIXED_AREA + (yStart - YMAX + BOT_FIXED_AREA);
if (yStart >= YMAX){
yStart = 0;
}
// Now we can scroll the display
scrollAddress(yStart);
returnyTemp;
}
// ##############################################################################################
// Setup a portion of the screen for vertical scrolling
// ##############################################################################################
// We are using a hardware feature of the display, so we can only scroll in portrait orientation
void setupScrollArea(uint16_t tfa, uint16_t bfa) {
M5.Lcd.writecommand(ILI9341_VSCRDEF); // Vertical scroll definition
M5.Lcd.writedata(tfa >> 8); // Top Fixed Area line count
M5.Lcd.writedata(tfa);
M5.Lcd.writedata((YMAX-tfa-bfa)>>8);// Vertical Scrolling Area line count
M5.Lcd.writedata(YMAX-tfa-bfa);
M5.Lcd.writedata(bfa >> 8); // Bottom Fixed Area line count
M5.Lcd.writedata(bfa);
}
// ##############################################################################################
// Setup the vertical scrolling start address pointer
// ##############################################################################################
void scrollAddress(uint16_t vsp) {
M5.Lcd.writecommand(ILI9341_VSCRSADD); // Vertical scrolling pointer
M5.Lcd.writedata(vsp>>8);
M5.Lcd.writedata(vsp);
}
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