Aliexpressなどで販売されている64x32のフルカラードットマトリクスLED2枚とNucleo F401REを利用して、 E233系の駅停車時、路線名表示ありのLED側面行先表示を再現するプログラムです。 3秒間隔、3段階切替で、路線名、種別、行先、次停車駅を個別に指定することが可能です。
Dependencies: SDFileSystem mbed
main.cpp
- Committer:
- chirashi
- Date:
- 2014-10-19
- Revision:
- 3:6dbbc0130e96
- Parent:
- 2:c1a9a2a0885d
- Child:
- 4:245f17936b1a
File content as of revision 3:6dbbc0130e96:
/* The goal of this program is to show the basic connections and workings of Adafruits 32x16 RGB LED matrix board (http://www.adafruit.com/products/420), also sold on other places, for instance http://www.ebay.com/itm/PH6-RGB-Full-Color-LED-16-32-Dot-Matrix-Display-Module-/310303408628?pt=LH_DefaultDomain_0&hash=item483f8641f4 (no affiliation with either of them). This program is not intended to be highly optimized or a guideline in C programming in any way (more of the opposite actually). To have more than 7 colors on this thing, you need to implement software PWM of some sort. I have obviously not done that, but if YOU do, please let me know! Adafruit have a wicked demo program for an arduino - www.youtube.com/watch?v=lY-flFEfsHo There are probably lots of ways to make this perform better, perhaps by using Neal Hormans port of the Adafruit_GFX library (http://mbed.org/users/nkhorman/code/Adafruit_GFX/). No error checking or out-of-bounds checking is done. Use at your own peril. For more detailed information on the driver chip, see http://www.bjtopspace.com/ziliao/CYT62726.pdf Although the chips on my board says jx15020, I've been informed that they are equvivalent to the CYT62726, and so far it's a match. Feel free to use all or parts of this work. If you choose to do so, I would appreciate a small mentioning in the scrolling opening credits ;) Best regards, Hugo Harming upgraded@hotmail.com */ #include "mbed.h" #define LOW 0 #define HIGH 1 BusOut ABC(D8,D9,D10); // Row address. DigitalOut CLK(D11); // Data clock - rising edge DigitalOut LAT(D12); // Data latch - active low (pulse up after data load) DigitalOut OE(D13); // Output enable - active low (hold high during data load, bring low after LAT pulse) DigitalOut R1(D2); // RED Serial in for upper half DigitalOut R2(D3); // RED Serial in for lower half DigitalOut G1(D4); // GREEN Serial in for upper half DigitalOut G2(D5); // GREEN Serial in for lower half DigitalOut B1(D6); // BLUE Serial in for upper half DigitalOut B2(D7); // BLUE Serial in for lower half unsigned char gm[32][6]; // Buffer with 32x6 bytes. Graphics memory if you like. unsigned long CT; // Counter for demo code void MkPattern() // Fill graphics buffer with colorful test pattern. { unsigned int col,r,g,b; r=0x0f0f0f0f; g=0x33333333; b=0x55555555; for(col=0; col<32; col++) { gm[col][0]=(r>>(col % 8)) & 0xff; // Shift red value and mask out LSB. gm[col][1]=(g>>(col % 8)) & 0xff; // Shift green value and mask out LSB. gm[col][2]=(b>>(col % 8)) & 0xff; // Shift blue value and mask out LSB. gm[col][3]=gm[col][0]; // Copy top red byte to bottom red byte. gm[col][4]=gm[col][1]; // Copy top green byte to bottom green byte. gm[col][5]=gm[col][2]; // Copy top blue byte to bottom blue byte. } } void Init() { // Set up things to a known state CLK = LOW; LAT = LOW; OE = HIGH; //display off ABC = 0; CT=0; MkPattern(); } void ShiftRight() { unsigned char i,r,g,b; r=gm[31][0]; // Save value of last column (top half) g=gm[31][1]; b=gm[31][2]; for(i=31; i>0; i--) { // Copy value of column n to column n-1 gm[i][0]=gm[i-1][0]; gm[i][1]=gm[i-1][1]; gm[i][2]=gm[i-1][2]; } gm[0][0]=r; // Paste saved values from last column to first column gm[0][1]=g; gm[0][2]=b; // Do it again for the lower half r=gm[31][3]; g=gm[31][4]; b=gm[31][5]; for(i=31; i>0; i--) { gm[i][3]=gm[i-1][3]; gm[i][4]=gm[i-1][4]; gm[i][5]=gm[i-1][5]; } gm[0][3]=r; gm[0][4]=g; gm[0][5]=b; } void WrRow(unsigned char Row) { // Write specified row (and row+8) to display. Valid input: 0 to 7. ABC = 7-Row; // Set row address for(int col=0; col<32; col++) { // To daisychain more displays, I guess you would have to increase this counter to n*32 columns. Might mirror though. R1 = gm[col][0] & (1<<Row); // Red bit, upper half G1 = gm[col][1] & (1<<Row); // Green bit, upper half B1 = gm[col][2] & (1<<Row); // Blue bit, upper half R2 = gm[col][3] & (1<<Row); // Red bit, lower half G2 = gm[col][4] & (1<<Row); // Green bit, lower half B2 = gm[col][5] & (1<<Row); // Blue bit, lower half CLK = HIGH; // tick (clock bit in) CLK = LOW; // tock } LAT = HIGH; // Latch entire row LAT = LOW; } void WrRowOFF(unsigned char Row) { // Write specified row (and row+8) to display. Valid input: 0 to 7. ABC = 7-Row; // Set row address for(int col=0; col<32; col++) { // To daisychain more displays, I guess you would have to increase this counter to n*32 columns. Might mirror though. R1 = 0; // Red bit, upper half G1 = 0; // Green bit, upper half B1 = 0; // Blue bit, upper half R2 = 0; // Red bit, lower half G2 = 0; // Green bit, lower half B2 = 0; // Blue bit, lower half CLK = HIGH; // tick (clock bit in) CLK = LOW; // tock } LAT = HIGH; // Latch entire row LAT = LOW; } void Pset(unsigned char x,unsigned char y, unsigned char c) { // Set pixel (x,y) to color c // Manipulates graphics memory, so you won't see any change til you Paint() it. unsigned char ud,l,r0,g0,b0; ud=(y & 8)>>3; // 0 = upper half, 1 = lower half l=y & 7; // Extract row in upper/lower half r0=(c & 4) >>2; // Extract red bit from color g0=(c & 2) >>1; // Extract green bit from color b0=(c & 1); // Extract blue bit from color // *******Removes current bit ******* *Adds bit** gm[x][0+3*ud]=(gm[x][0+3*ud] & (255-(1<<(7-l))))+(r0<<(7-l)); // Red byte gm[x][1+3*ud]=(gm[x][1+3*ud] & (255-(1<<(7-l))))+(g0<<(7-l)); // Green byte gm[x][2+3*ud]=(gm[x][2+3*ud] & (255-(1<<(7-l))))+(b0<<(7-l)); // Blue byte } void Paint() { // Write graphics memory to display for(int Row=0; Row<8; Row++) { OE = HIGH; // Disable output WrRow(Row); OE = LOW; // Enable output wait_us(500); // Wasting some time. Use for whatever else. Probably better with a ticker for the display refresh. } } void PaintOFF() { // Write graphics memory to display for(int Row=0; Row<8; Row++) { OE = HIGH; // Disable output WrRowOFF(Row); OE = LOW; // Enable output wait_us(500); // Wasting some time. Use for whatever else. Probably better with a ticker for the display refresh. } } int main() { Init(); // Set things up while(1) { // Messy demo loop following... CT++; if((CT<=2560)||(CT>=2880 && CT<=4160)) { Paint(); // Refresh display if((CT % 20)==0) ShiftRight(); // After every 20 refresh, do a ShiftRight } if(CT==2560) { for(int c=0; c<8; c++) { for(int x=c; x<(31-c); x++) {// Top side Pset(x,c,c); Paint(); // Display refresh time sets loop duration. } for(int y=c; y<(15-c); y++) {// Right side Pset(31-c,y,c); Paint(); } for(int x=(31-c); x>=c; x--) {// Bottom side Pset(x,(15-c),c); Paint(); } for(int y=(15-c); y>=c; y--) { // Left side Pset(c,y,c); Paint(); } } } if(CT>4160) { MkPattern(); // Restore original priceless artwork CT=0; // Start all over. } PaintOFF(); wait_us(100); } }