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:
- 0:5e18eb7da208
- Child:
- 1:ee2692588275
diff -r 000000000000 -r 5e18eb7da208 main.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Fri Dec 09 21:40:36 2011 +0000 @@ -0,0 +1,489 @@ +#include "mbed.h" +#include "i2cmessages.h" +#include "USBHID.h" + +//We declare a USBHID device. By default input and output reports are 64 bytes long. +USBHID hid( 9, 1, 0x1Fc9, 0x0003, 0x0100, 1); + +//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; + +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; + +RB_type Rainbow[] = { + 255, 0, 0, + 255, 23, 0, + 255, 64, 0, + 255, 127, 0, + 255, 193, 0, + 255, 255, 0, + 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, + 127, 0, 255, + 193, 0, 255, + 255, 0, 255, + 255, 0, 193, + 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 ); +} + +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; + } + 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; + } + 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(); + } +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); + } + 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); + } + update_LED(); + b++; + } +set_my_LED(0); +rainbow_LED(); +update_LED(); +} + +void SetOutReport (void) +{ +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 + } 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; + } + } + tflag = 1; + } +} + + + + + + +/*********************************************************************** +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(); + +// 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; + } + } +} \ No newline at end of file