This is a project to replace the 8051 on a existing RGB LED board and add USB functionality. The original board relied on 8051 firmware to control the LEDs so any changes required software development. This version provides a USB interface for LED control. The USB interface is implemented as a HID with a 9 byte OutReport. In conjunction with a simple GUI the RGB LED board can now be controlled to set color patterns, intensity and pattern sequencing.
Dependencies: PCA9635-6 mbed USBDevice
RGB GUI - Windows program to control the PCA9635 board.
Diff: main.cpp
- Revision:
- 1:ee2692588275
- Parent:
- 0:5e18eb7da208
--- a/main.cpp Fri Dec 09 21:40:36 2011 +0000 +++ b/main.cpp Sat Apr 05 12:27:10 2014 +0000 @@ -1,69 +1,35 @@ +/************************************************************************************************ +* +* NXP MCU I2C RGB LED DEMO (6 x PCA9635) +* Code ported from http://mbed.org/users/JimCarver/code/RGB2/ +* Changes : Created a library for the LED DEMO board +* LED control GUI : http://mbed.org/users/JimCarver/notebook/rgb-led-control-gui/ +* +************************************************************************************************/ + #include "mbed.h" -#include "i2cmessages.h" #include "USBHID.h" +#include "PCA9635_6.h" -//We declare a USBHID device. By default input and output reports are 64 bytes long. -USBHID hid( 9, 1, 0x1Fc9, 0x0003, 0x0100, 1); +// We declare a USBHID device. By default input and output reports are 64 bytes long. +// Note : HID connection on the KL25Z board is marked with 'USB' +USBHID hid( 9, 1, 0x1Fc9, 0x0003, 0x0100, 1); // output_report_length, input_report_length, vendor_id, product_id, product_release + +//Ledboard with 6 x PCA9635 - NXP MCU I2C RGB LED DEMO +PCA9635_6 ledboard(PTE0, PTE1, PTD7); //SDA, SCL, EN + +DigitalIn SW6(PTD0); // Pull low to run the test pattern at startup. +DigitalIn SW5(PTD5); // Status of this pin is written to send_report.data[0] //This report will contain data to be sent HID_REPORT send_report; HID_REPORT recv_report; -Serial pc(USBTX, USBRX); - -DigitalOut myled1(LED1); -DigitalOut myled2(LED2); -DigitalOut myled3(LED3); -DigitalOut myled4(LED4); -DigitalOut led_en(p8); -DigitalIn SW6(p11); -DigitalIn SW5(p30); - -I2C i2c(p28, p27); - -Timer ms_timer; - -AnalogIn ain(p20); - -/*************************************************************************** -NAME OF MODULE: MAIN.C -DESCRIPTION: Main file for the LED String Demoboard - -(C) Copyright 2008 NXP Semiconductors - -****************************************************************************/ -BYTE dflag, tflag; +uint8_t dflag, tflag; -BYTE Buffer1[18]; -BYTE Buffer2[18]; -BYTE Buffer3[18]; -BYTE Buffer4[18]; -BYTE Buffer5[18]; -BYTE Buffer6[18]; - -I2C_MESSAGE I2C_Message; int dval; typedef struct { - uint32_t LED; - uint8_t RED, GREEN, BLUE, INTENSITY; - } LED_Report_type ; - -volatile LED_Report_type *LED_Report; - - -typedef struct { -// Definition for a LED location, buffer pointer, and index into that buffer - BYTE *buf, n; - } LED_type; - -typedef struct { - LED_type RED; - LED_type GREEN; - LED_type BLUE; - } RGB_type; - -typedef struct { uint8_t r, g, b; } RB_type; @@ -77,22 +43,22 @@ 193, 255, 0, 127, 255, 0, 127, 255, 0, - 63, 255, 0, - 0, 255, 0, - 0, 255, 7, - 0, 255, 15, - 0, 255, 31, - 0, 255, 63, - 0, 255, 91, - 0, 255, 127, - 0, 255, 193, - 0, 255, 255, - 0, 193, 255, - 0, 127, 255, - 0, 63, 255, - 0, 0, 255, - 31, 0, 255, - 63, 0, 255, + 63, 255, 0, + 0, 255, 0, + 0, 255, 7, + 0, 255, 15, + 0, 255, 31, + 0, 255, 63, + 0, 255, 91, + 0, 255, 127, + 0, 255, 193, + 0, 255, 255, + 0, 193, 255, + 0, 127, 255, + 0, 63, 255, + 0, 0, 255, + 31, 0, 255, + 63, 0, 255, 127, 0, 255, 193, 0, 255, 255, 0, 255, @@ -100,390 +66,140 @@ 255, 0, 127, 255, 0, 63, 255, 0, 15 - }; - -// An array of structures that define the buffer and location in the buffer for all of the LEDs -// Due to the design of the RGB LED board this is easier than the convoluted calculation needed -// -RGB_type RGB_LED[32] = { -// RED GREEN BLUE -// LED1-16 - Buffer1, 2, Buffer1, 3, Buffer1, 4, - Buffer1, 5, Buffer1, 6, Buffer1, 7, - Buffer1, 8, Buffer1, 9, Buffer1, 10, - Buffer1, 11, Buffer1, 12, Buffer1, 13, - Buffer1, 14, Buffer1, 15, Buffer1, 16, - Buffer1, 17, Buffer3, 2, Buffer3, 3, - Buffer3, 4, Buffer3, 5, Buffer3, 6, - Buffer3, 7, Buffer3, 8, Buffer3, 9, - Buffer3, 10, Buffer3, 11, Buffer3, 12, - Buffer3, 13, Buffer3, 14, Buffer3, 15, - Buffer3, 16, Buffer3, 17, Buffer5, 2, - Buffer5, 3, Buffer5, 4, Buffer5, 5, - Buffer5, 6, Buffer5, 7, Buffer5, 8, - Buffer5, 9, Buffer5, 10, Buffer5, 11, - Buffer5, 12, Buffer5, 13, Buffer5, 14, - Buffer5, 15, Buffer5, 16, Buffer5, 17, - -// LED17-32 - Buffer2, 2, Buffer2, 3, Buffer2, 4, - Buffer2, 5, Buffer2, 6, Buffer2, 7, - Buffer2, 8, Buffer2, 9, Buffer2, 10, - Buffer2, 11, Buffer2, 12, Buffer2, 13, - Buffer2, 14, Buffer2, 15, Buffer2, 16, - Buffer2, 17, Buffer4, 2, Buffer4, 3, - Buffer4, 4, Buffer4, 5, Buffer4, 6, - Buffer4, 7, Buffer4, 8, Buffer4, 9, - Buffer4, 10, Buffer4, 11, Buffer4, 12, - Buffer4, 13, Buffer4, 14, Buffer4, 15, - Buffer4, 16, Buffer4, 17, Buffer6, 2, - Buffer6, 3, Buffer6, 4, Buffer6, 5, - Buffer6, 6, Buffer6, 7, Buffer6, 8, - Buffer6, 9, Buffer6, 10, Buffer6, 11, - Buffer6, 12, Buffer6, 13, Buffer6, 14, - Buffer6, 15, Buffer6, 16, Buffer6, 17 }; - -// -// Lookup the buffer and index to set the desired values -// in the appropriate locations within the I2C message buffers -// update_LED() actually sends the buffers through I2C to the drivers -// -void set_LED(int LEDn, BYTE R, BYTE G, BYTE B) -{ - RGB_LED[LEDn].RED.buf[RGB_LED[LEDn].RED.n] = R; - RGB_LED[LEDn].GREEN.buf[RGB_LED[LEDn].GREEN.n] = G; - RGB_LED[LEDn].BLUE.buf[RGB_LED[LEDn].BLUE.n] = B; -} - -void set_my_LED(int c) -{ - if(c & 1) { myled4 = 1; } else { myled4 = 0; } - if(c & 2) { myled3 = 1; } else { myled3 = 0; } - if(c & 4) { myled2 = 1; } else { myled2 = 0; } - if(c & 8) { myled1 = 1; } else { myled1 = 0; } -} - -/*********************************************************************** -DESCRIPTION: Initalization of the buffers (Buffer1, buffer2, Buffer3) -INPUT(S): None -RETURNS: Nothing -************************************************************************/ -void Init_Buffers(void) -{ - int i = 0; - for (i = 0; i<18; i++) - { - Buffer1[i] = 0; - Buffer2[i] = 0; - Buffer3[i] = 0; - Buffer4[i] = 0; - Buffer5[i] = 0; - Buffer6[i] = 0; - } - - Buffer1[0] = 17; - Buffer2[0] = 17; - Buffer3[0] = 17; - Buffer4[0] = 17; - Buffer5[0] = 17; - Buffer6[0] = 17; - Buffer1[1] = 0x82; - Buffer2[1] = 0x82; - Buffer3[1] = 0x82; - Buffer4[1] = 0x82; - Buffer5[1] = 0x82; - Buffer6[1] = 0x82; -} - - -/*********************************************************************** -DESCRIPTION: Fill all the PWM register of a device with a RGB setting -INPUT(S): A,B,C --> Primary colors -RETURNS: Nothing -************************************************************************/ -void Set_Same_Color_Single_Device(BYTE A, BYTE B, BYTE C) -{ - int i; - Buffer1[0] = 17; - Buffer1[1] = 0x82; - for (i = 0; i < 5; i++) - { - Buffer1[3*i+2] = A; - Buffer1[3*i+3] = B; - Buffer1[3*i+4] = C; - } - Buffer1[17] = A; -} - - -void delay(int dd) -{ -ms_timer.reset(); -ms_timer.start(); -while(ms_timer.read_ms() <= (dd)); -ms_timer.stop(); -} - -void i2cfail(void) -{ -int c = 0; -while(1) { - set_my_LED(c++); - delay(50); - } -} - -void I2C_Write(I2C_MESSAGE *mp) -{ -if(i2c.write(mp->address, (char *) &mp->buf[1], mp->buf[0])) i2cfail(); -} - -/*********************************************************************** -DESCRIPTION: Set the I2C address to the ALL CALL Address and - send the I2C_Write command -INPUT(S): None -RETURNS: Nothing -************************************************************************/ -void Write_All_Devices(void) -{ - I2C_Message.address = ALL_CALL_I2C_ADDRESS; - I2C_Write(&I2C_Message); -} - - -/*********************************************************************** -DESCRIPTION: Set the I2C address to the required address and - send the I2C_Write command -INPUT(S): I2C Address of the targetted device (LSB = 0) -RETURNS: Nothing -************************************************************************/ -void Write_To_Device(BYTE I2C_Address) -{ - I2C_Message.address = I2C_Address; - I2C_Write(&I2C_Message); -} - - -/*********************************************************************** -DESCRIPTION: Set the I2C address to the required address and - send the I2C_Write command - Wait (delay) before moving to the next step -INPUT(S): I2C Address of the targetted device (LSB = 0) - Delay = delay in ms / 10 -RETURNS: Nothing -************************************************************************/ -void Write_To_Device_And_Wait(BYTE I2C_Address, BYTE Delay_Value) -{ - I2C_Message.address = I2C_Address; - I2C_Write(&I2C_Message); - delay(Delay_Value); -} - - -/*********************************************************************** -DESCRIPTION: Swtich of ALL the LEDs using the ALL CALL address -INPUT(S): None -RETURNS: Nothing -************************************************************************/ -void ALL_LED_OFF(void) // Switch off all the LEDs -{ - I2C_Message.buf = LED_ALL_OFF; - Write_All_Devices(); -} - - -void LED_INTENSITY(void) -{ - //GLOBAL_INTENSITY[2] = global_i; - I2C_Message.buf = GLOBAL_INTENSITY; - Write_All_Devices(); -} - - -void update_LED(void) -{ - I2C_Message.buf = Buffer1; - Write_To_Device(0x80); - I2C_Message.buf = Buffer2; - Write_To_Device(0x86); - I2C_Message.buf = Buffer3; - Write_To_Device(0x82); - I2C_Message.buf = Buffer4; - Write_To_Device(0x88); - I2C_Message.buf = Buffer5; - Write_To_Device(0x84); - I2C_Message.buf = Buffer6; - Write_To_Device(0x8A); -} - -void read_LED( int LEDn, BYTE *R, BYTE *G, BYTE *B) -{ - *R = RGB_LED[LEDn].RED.buf[RGB_LED[LEDn].RED.n]; - *G = RGB_LED[LEDn].GREEN.buf[RGB_LED[LEDn].GREEN.n]; - *B = RGB_LED[LEDn].BLUE.buf[RGB_LED[LEDn].BLUE.n]; -} +}; void rainbow_LED( void) { -int i; - for(i=0;i<32;i++) set_LED( i, Rainbow[i].r, Rainbow[i].g, Rainbow[i].b ); + int i; + for(i=0; i<32; i++) ledboard.set_LED( i, Rainbow[i].r, Rainbow[i].g, Rainbow[i].b ); } void ripple_LED( void ) { -uint32_t m; -uint8_t LEDn, R, G, B, tR, tG, tB; -if( dflag) { // Ripple LEDs to the right - read_LED( 0, &tR, &tG, &tB); // Save the first LED value - for(LEDn = 0 , m = 1; LEDn < 31; LEDn++) { - read_LED( LEDn+1, &R, &G, &B); - set_LED( LEDn, R, G, B); - m = m << 1; + uint32_t m; + uint8_t LEDn, R, G, B, tR, tG, tB; + if( dflag) { // Ripple LEDs to the right + ledboard.read_LED( 0, &tR, &tG, &tB); // Save the first LED value + for(LEDn = 0 , m = 1; LEDn < 31; LEDn++) { + ledboard.read_LED( LEDn+1, &R, &G, &B); + ledboard.set_LED( LEDn, R, G, B); + m = m << 1; } - set_LED( 31, tR, tG, tB); + ledboard.set_LED( 31, tR, tG, tB); } else { // Ripple LEDs to the left - read_LED( 31, &tR, &tG, &tB); - for(LEDn = 31, m = 0x80000000 ; LEDn > 0; LEDn--) { - read_LED( LEDn - 1, &R, &G, &B); - set_LED( LEDn, R, G, B); - m = m >> 1; + ledboard.read_LED( 31, &tR, &tG, &tB); + for(LEDn = 31, m = 0x80000000 ; LEDn > 0; LEDn--) { + ledboard.read_LED( LEDn - 1, &R, &G, &B); + ledboard.set_LED( LEDn, R, G, B); + m = m >> 1; } - set_LED( 0, tR, tG, tB); + ledboard.set_LED( 0, tR, tG, tB); } -} - - +} + + void test_pattern(void) { -int l, r, g, b; -// Dim Blue Color (from min to max) -Init_Buffers(); -set_my_LED(1); -for (r = 0, g = 0, b = 0; b < 0xFF; b++) { - for(l = 0; l < 32; l++) { - set_LED( l, r, g, b); - } - update_LED(); + int l, r, g, b; + // Dim Blue Color (from min to max) + ledboard.Init_Buffers(); + for (r = 0, g = 0, b = 0; b < 0xFF; b++) { + for(l = 0; l < 32; l++) { + ledboard.set_LED( l, r, g, b); + } + ledboard.update_LED(); + } + // Mix from Only Blue (Max going to off) to Only Green (off to Max) + for (r = 0, g = 0, b = 0xFF; b >= 0x00; b--) { + for(l = 0; l < 32; l++) { + ledboard.set_LED( l, r, g, b); + } + ledboard.update_LED(); + g++; } -set_my_LED(2); -// Mix from Only Blue (Max going to off) to Only Green (off to Max) -for (r = 0, g = 0, b = 0xFF; b >= 0x00; b--) { - for(l = 0;l < 32; l++) { - set_LED( l, r, g, b); - } - update_LED(); - g++; - } -set_my_LED(4); -// Mix from Only Green (Max going to off) to Only Red (off to Max) -for (r = 0, g = 0xFF, b = 0; g >= 0x00; g--) { - for (l = 0;l < 32; l++) { - set_LED( l, r, g, b); + // Mix from Only Green (Max going to off) to Only Red (off to Max) + for (r = 0, g = 0xFF, b = 0; g >= 0x00; g--) { + for (l = 0; l < 32; l++) { + ledboard.set_LED( l, r, g, b); } - update_LED(); - r++; + ledboard.update_LED(); + r++; } -set_my_LED(8); -// Mix from Only Red (Max going to off) to Only Blue (off to Max) -for (r = 0xFF, g = 0, b = 0; r >= 0x00; r--) { - for (l = 0;l < 32; l++) { - set_LED( l, r, g, b); + // Mix from Only Red (Max going to off) to Only Blue (off to Max) + for (r = 0xFF, g = 0, b = 0; r >= 0x00; r--) { + for (l = 0; l < 32; l++) { + ledboard.set_LED( l, r, g, b); } - update_LED(); - b++; + ledboard.update_LED(); + b++; } -set_my_LED(0); -rainbow_LED(); -update_LED(); + rainbow_LED(); + ledboard.update_LED(); } void SetOutReport (void) { -int LEDn; -uint32_t led, m; -uint8_t R, G, B, seq; + int LEDn; + uint32_t led, m; + uint8_t R, G, B, seq; /* Check the bits of the "OutReport" data from the PC * and set the output port status. */ -seq = recv_report.data[0]; -//LED_Report = (LED_Report_type *) &recv_report.data[1]; -GLOBAL_INTENSITY[2] = recv_report.data[8]; -if(seq) { - tflag = 2; - dflag = seq & 1; - dval = (seq & 0xFC) >> 1; // sets a range from 0x00 to 0x7E + seq = recv_report.data[0]; + //LED_Report = (LED_Report_type *) &recv_report.data[1]; + ledboard.set_global_intensity(recv_report.data[8]); + if(seq) { + tflag = 2; + dflag = seq & 1; + dval = (seq & 0xFC) >> 1; // sets a range from 0x00 to 0x7E } else { - led = recv_report.data[4]; - led <<= 8; - led |= recv_report.data[3]; - led <<= 8; - led |= recv_report.data[2]; - led <<= 8; - led |= recv_report.data[1]; - - set_my_LED(led & 0xf); - R = recv_report.data[5]; - G = recv_report.data[6]; - B = recv_report.data[7]; - for(LEDn=0, m=1;LEDn < 32; LEDn++, m <<= 1) { - if(led & m) { - RGB_LED[LEDn].RED.buf[RGB_LED[LEDn].RED.n] = R; - RGB_LED[LEDn].GREEN.buf[RGB_LED[LEDn].GREEN.n] = G; - RGB_LED[LEDn].BLUE.buf[RGB_LED[LEDn].BLUE.n] = B; + led = recv_report.data[4]; + led <<= 8; + led |= recv_report.data[3]; + led <<= 8; + led |= recv_report.data[2]; + led <<= 8; + led |= recv_report.data[1]; + + R = recv_report.data[5]; + G = recv_report.data[6]; + B = recv_report.data[7]; + for(LEDn=0, m=1; LEDn < 32; LEDn++, m <<= 1) { + if(led & m) { + ledboard.set_LED( LEDn, R, G, B); } } - tflag = 1; + tflag = 1; } } - - - - - /*********************************************************************** -DESCRIPTION: Main function -INPUT(S): None -RETURNS: Nothing +DESCRIPTION: Main function +INPUT(S): None +RETURNS: Nothing ************************************************************************/ int main (void) { -int l = 1; -led_en = 0; -set_my_LED(1); -// Perform Software Reset - Set the PCA9635 in a known state -I2C_Message.buf = SW_RESET; -Write_To_Device(SW_RESET_I2C_ADDRESS); - -// Wake up and Init the PCA9635 using ALL CALL address -I2C_Message.buf = WAKE_UP_AND_INIT; -Write_All_Devices(); -Init_Buffers(); + if(!SW6) test_pattern(); + dflag = 0; + dval = 10; + tflag = 0; + send_report.length = 1; + while (1) { + send_report.data[0] = SW5; + hid.send(&send_report); + if(hid.readNB(&recv_report)) SetOutReport(); + if(tflag == 2) { + ripple_LED(); + ledboard.update_LED(); + ledboard.LED_INTENSITY(); + wait_ms(dval); + } -// Program all LED outputs to Individual PWM + Global PWM using ALL CALL address -I2C_Message.buf = LED_ALL_INDVDL_PLUS_GLOBL_PWM_CTRL; -Write_All_Devices(); -if(!SW6) test_pattern(); -dflag = 0; -dval = 10; -tflag = 0; -set_my_LED(l++); -send_report.length = 1; -while (1) { - send_report.data[0] = SW5; - hid.send(&send_report); - if(hid.readNB(&recv_report)) SetOutReport(); - if(tflag == 2) { - ripple_LED(); - update_LED(); - LED_INTENSITY(); - delay(dval); - } - - if(tflag == 1) { - update_LED(); - LED_INTENSITY(); - tflag = 0; - } + if(tflag == 1) { + ledboard.update_LED(); + ledboard.LED_INTENSITY(); + tflag = 0; + } } } \ No newline at end of file