TPS62260LED-338 EVM数字可寻址照明接口(DALI)设计电路原理图+msp430程序

ID:124161 · 发表于 2016-6-18 20:20

实物图：

描述

数字可寻址照明接口 (DALI) 标准定义了用于照明控制应用中的通用通信协议和物理接口标准。该设计采用现有的 TPS62260LED-338 EVM 和电平转换电路板以实施 DALI LED 器件类型控制机构。在 TPS62260LED-338 EVM 上找到的微控制器为 MSP430F2131。MSP430F2131 负责执行与 CPU 间的通信，而计时器资源主要用于控制淡出率和 LED 亮度。DALI 在 IEC 60929 中有具体的定义，并已在 IEC 62386 中进行了更新。包含 LED 器件类型是进行此更新的主要原因之一。

特性

使用板载 MSP430 计时器实施 DALI 协议
提供用于 MSP430 的 DALI 接口的 PHY 设计
与 TPS62260LED-338 EVM 配合使用
还提供 MSP430 G2 Launchpad 支持
该参考设计已经过测试，并包含软件、硬件设计gerber文件和相关的设计资料；

电路原理图：

BOM:
[size=15.7537px]BOM
[size=15.7537px]Digital Addressable Lighting Interface (DALI)
[size=15.7537px]Bill of Materials
[size=15.7537px]X1    851-93-006-20-001000 Mill-Max
[size=15.7537px]IC1    SN74AC14DR             Texas Instruments
[size=15.7537px]R1    10K Ohm resistor +/-5%
[size=15.7537px]R2    10K Ohm resistor +/-5%
[size=15.7537px]R3    200 ohm resistor +/-5%
[size=15.7537px]OK1    SFH6156-1T             Vishay/Semiconductors
[size=15.7537px]K1    ASSR-1410-003E       Avago Technologies
[size=15.7537px]X2    1935226                Phoenix Contact
[size=15.7537px]X3    1935226                Phoenix Contact

部分程序：

/******************************************************************************/
// DALI RGB-LED Demo using MSP430F2131 and TPS62260 from Texas Instruments
// The MSP430F2131 IO does not support the DALI logic levels and a level
// translation circuit is required.
//
// LED PWM Description:
// 8Mhz clock with a period of 5000 counts results in a frequency of 1.6Khz.
// Minimum Physical Level setting for the TPS62260 EVM is 90
//
// DALI:
// TI_DALI_Init()
// This function restores the previous DALI settings stored in information
// memory and intializes the WDT+, RAM varaibles, and GPIO. The WDT+ is used
// to update the actual_level based upon the DALI fade_rate or fade_time.
//
// TI_DALI_Transaction_Loop()
// This function continually receives, decodes, and then acts upon DALI
// commands.
//
// TI_DALI_Update_Callback()
// The LED source continues without CPU intervention until the source needs
// to be updated. In this case the source is the TIMER_A3, outputs A1 and A2.
//
// TI_DALI_Idle_Callback()
// The time between two transactions (forward-forward or forward-backward)
// is limited in the standard to 9.17ms. After the CPU has processed the
// recevied information this leaves only about 7ms to do other processes
// before the CPU must receive or transmit the next DALI transaction.
//
// TI_DALI_Flash_Update(FWKEY)
// This takes all of the non-voltaile variables defined in the standard and
// writes them into a free portion of one of the info memory segments.
// This function is intended to be called only once before or during a power
// loss event. The write cycles takes approximately 2.5ms and Vcc must be
// greater than 2.2V during the write.
//
// Chris Sterzik
// Texas Instruments
// Built with CCS Version: 5.20
//
// Revision 1.1 09/17/2012
/******************************************************************************/
// THIS PROGRAM IS PROVIDED "AS IS". TI MAKES NO WARRANTIES OR
// REPRESENTATIONS, EITHER EXPRESS, IMPLIED OR STATUTORY,
// INCLUDING ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
// FOR A PARTICULAR PURPOSE, LACK OF VIRUSES, ACCURACY OR
// COMPLETENESS OF RESPONSES, RESULTS AND LACK OF NEGLIGENCE.
// TI DISCLAIMS ANY WARRANTY OF TITLE, QUIET ENJOYMENT, QUIET
// POSSESSION, AND NON-INFRINGEMENT OF ANY THIRD PARTY
// INTELLECTUAL PROPERTY RIGHTS WITH REGARD TO THE PROGRAM OR
// YOUR USE OF THE PROGRAM.
//
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// CONSEQUENTIAL OR INDIRECT DAMAGES, HOWEVER CAUSED, ON ANY
// THEORY OF LIABILITY AND WHETHER OR NOT TI HAS BEEN ADVISED
// OF THE POSSIBILITY OF SUCH DAMAGES, ARISING IN ANY WAY OUT
// OF THIS AGREEMENT, THE PROGRAM, OR YOUR USE OF THE PROGRAM.
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// OF GOODWILL, LOSS OF PROFITS, LOSS OF SAVINGS, OR LOSS OF
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// AGGREGATE LIABILITY UNDER THIS AGREEMENT OR ARISING OUT OF
// YOUR USE OF THE PROGRAM EXCEED FIVE HUNDRED DOLLARS
// (U.S.$500).
//
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// only under TI's copyright in the Program, use and modify the
// Program without any charge or restriction. You may
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// copyrighted material, trade secrets and other TI proprietary
// information and is protected by copyright laws,
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// well as other intellectual property laws. To protect TI's
// rights in the Program, you agree not to decompile, reverse
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// as specifically provided herein, nothing in this agreement
// shall be construed as conferring by implication, estoppel,
// or otherwise, upon you, any license or other right under any
// TI patents, copyrights or trade secrets.
/******************************************************************************/
#include "dali_demo_hw.h"
#include "dali.h"
void Update_Callback(void);
void DALI_Idle_Callback(void);
/*********************LED Pointer Table ***************************************/
const unsigned int LED[255]={0,5,5,5,5,6,6,6,6,6,6,7,7,7,7,7,7,8,8,8,8,9,9,9,9,
10,10,10,10,11,11,11,12,12,12,13,13,13,14,14,14,15,15,16,16,17,17,17,18,18,19,
20,20,21,21,22,22,23,24,24,25,26,26,27,28,29,29,30,31,32,33,34,35,36,37,38,39,
40,41,42,43,44,46,47,48,49,51,52,54,55,57,58,60,61,63,65,67,69,70,72,74,76,79,
81,83,85,88,90,93,95,98,100,103,106,109,112,115,118,122,125,128,132,136,139,
143,147,151,156,160,164,169,173,178,183,188,193,199,204,210,216,222,228,234,
241,247,254,261,269,276,284,291,300,308,316,325,334,343,353,363,373,383,394,
404,416,427,439,451,464,476,490,503,517,531,546,561,577,593,609,626,643,661,
679,698,718,737,758,779,800,823,845,869,893,917,943,969,996,1023,1052,1081,
1111,1141,1173,1205,1239,1273,1308,1345,1382,1420,1459,1500,1541,1584,1628,
1673,1719,1767,1816,1866,1918,1971,2025,2081,2139,2198,2259,2321,2386,2452,
2519,2589,2661,2735,2810,2888,2968,3050,3135,3221,3311,3402,3496,3593,3693,
3795,3900,4008,4119,4233,4350,4470,4594,4721,4852,4986
}; //LED
/******************************************************************************/
static void Timer_Init(void);
static void Clock_Init(void);
// Main Program
void main(void)
{
unsigned int temp_flash_key;
WDTCTL=WDTPW+WDTHOLD; // disable Watchdog
Clock_Init();
GPIO_INIT(); // GPIO Initialization
Timer_Init(); // Timer Initialization
temp_flash_key = FWKEY; //
TI_DALI_Init(temp_flash_key); // Initialize WDT for DALI fade implementation
temp_flash_key = 0;
TAxCTL |= MC_1; // start Timer_A (up mode)
__enable_interrupt(); // enable maskable interrupts
TI_DALI_Transaction_Loop();
/* should never return */
while(1);
} //End Main
static void Clock_Init(void)
{
DCOCTL = 0;
BCSCTL1= CALBC1_8MHZ; // System Clock Settings
DCOCTL = CALDCO_8MHZ; // use calibrated 8MHz settings
// This should be coordinated with the dali.h file
}
static void Timer_Init(void)
{
/*** PWM Timer Initialization ***********************************************/
TPS62260_ENABLE_PxOUT &= ~TPS62260_ENABLE_BIT; // Turn off LEDs
TAxCTL = TASSEL_2+ID_0+MC_0+TACLR; // Timer clock = SMCLK = 8MHz
TAxCCR0=5000; // Define 1.6Khz frequency
TAxCCR1=LED[power_on_level]; // This power level will be overwritten
TAxCCR2=LED[power_on_level]; // by the reception of a power command
// within 0.6 seconds. After this time
// the device will automatically go to
// the power on level if no command is
// received.
TAxCCTL1 = CM_0+CCIS_2+OUTMOD_3; // ReSet on TACCRx, set on TACCR0
TAxCCTL2 = CM_0+CCIS_2+OUTMOD_3;
/****************************************************************************/
}
void TI_DALI_Update_Callback()
{
TAxCCTL1 |= CCIE;
}
void TI_DALI_Idle_Callback(void)
{
__no_operation();
}
/******************************************************************************/
// Timer_A Interrupt Service Routine:
/******************************************************************************/
#pragma vector=TIMER_VECTOR
__interrupt void ISR_TimerA(void)
{
if(actual_level==OFF)
{
/* turn off LEDs */
TPS62260_ENABLE_PxOUT &= ~TPS62260_ENABLE_BIT;
TAxCCR1 = 0x00;
TAxCCR2 = 0x00;
}
else
{
//--- PWM signal generation
TPS62260_ENABLE_PxOUT|= TPS62260_ENABLE_BIT;
TAxCCR1=LED[actual_level]; //
TAxCCR2=LED[actual_level]; //
}
TAxCCTL1 &= ~CCIE;
}
/******************************************************************************/
// Power loss event, save settings
/******************************************************************************/
// if(flash_update_request)
// {
// TI_DALI_Flash_Update(FWKEY);
// WDTCTL = 0x05; // illegal write to watch dog causes reset
// }
#pragma vector=DUMMY_VECTORS
__interrupt void ISR_Dummy(void)
{
while(1)
{
}
}