dac.rar_28335 DAC_DA 28335_DAC_DAC7715 28335

// TI File $Revision: /main/3 $ // Checkin $Date: July 2, 2007 11:33:46 $ //########################################################################### // // FILE: Example_281xAdc.c // // TITLE: DSP281x ADC Example Program. // // ASSUMPTIONS: // // This program requires the DSP281x V1.00 header files. // As supplied, this project is configured for "boot to H0" operation. // // Make sure the CPU clock speed is properly defined in // DSP281x_Examples.h before compiling this example. // // Connect signals to be converted to A2 and A3. // // // DESCRIPTION: // // This example sets up the PLL in x10/2 mode, divides SYSCLKOUT // by six to reach a 25Mhz HSPCLK (assuming a 30Mhz XCLKIN). The // clock divider in the ADC is not used so that the ADC will see // the 25Mhz on the HSPCLK. Interrupts are enabled and the EVA // is setup to generate a periodic ADC SOC on SEQ1. Two channels // are converted, ADCINA3 and ADCINA2. // // Watch Variables: // // Voltage1[10] Last 10 ADCRESULT0 values // Voltage2[10] Last 10 ADCRESULT1 values // ConversionCount Current result number 0-9 // LoopCount Idle loop counter // // //########################################################################### // $TI Release: DSP281x Header Files V1.11 $ // $Release Date: September 26, 2007 $ //########################################################################### #include "DSP2833x_Device.h" // DSP281x Headerfile Include File #include "DSP2833x_Examples.h" // DSP281x Examples Include File //#include "device.h" // DSP2812EVM Device Include File #include "math.h" #define DAC1_OUT *( volatile unsigned int * )( 0x00240004 ) #define DAC2_OUT *( volatile unsigned int * )( 0x00240005 ) #define DAC3_OUT *( volatile unsigned int * )( 0x00240006 ) #define DAC4_OUT *( volatile unsigned int * )( 0x00240007 ) #define DAC_LDC *( volatile unsigned int * )( 0x00260000 ) void dac_ldc_ctl(unsigned int ldcdata); void dac_transparent(unsigned int DA_num ,unsigned int trans_dat); float sindat; main() { float i; // Step 1. Initialize System Control: // PLL, WatchDog, enable Peripheral Clocks // This example function is found in the DSP281x_SysCtrl.c file. InitSysCtrl(); InitXintf(); // For this example, set HSPCLK to SYSCLKOUT / 6 (25Mhz assuming 150Mhz SYSCLKOUT) EALLOW; SysCtrlRegs.HISPCP.all = 0x3; // HSPCLK = SYSCLKOUT/6 EDIS; // Step 2. Initialize GPIO: // This example function is found in the DSP281x_Gpio.c file and // illustrates how to set the GPIO to it's default state. // InitGpio(); // Skipped for this example // Step 3. Clear all interrupts and initialize PIE vector table: // Disable CPU interrupts DINT; // Initialize the PIE control registers to their default state. // The default state is all PIE interrupts disabled and flags // are cleared. // This function is found in the DSP281x_PieCtrl.c file. InitPieCtrl(); // Disable CPU interrupts and clear all CPU interrupt flags: IER = 0x0000; IFR = 0x0000; // Initialize the PIE vector table with pointers to the shell Interrupt // Service Routines (ISR). // This will populate the entire table, even if the interrupt // is not used in this example. This is useful for debug purposes. // The shell ISR routines are found in DSP281x_DefaultIsr.c. // This function is found in DSP281x_PieVect.c. InitPieVectTable(); // Wait for ADC interrupt while(1) { for(i=0;i<256.0;i++) { sindat = sin((i/255.0)*6.28)+1.000; sindat = sindat * 2047.000 ; dac_transparent(1 ,(unsigned int )sindat); sindat = cos((i/255.0)*6.2830)+1.000; sindat = sindat * 2047.000 ; dac_transparent(2 ,(unsigned int )sindat); if(i<128){ dac_transparent(3 ,0); }else { dac_transparent(3 ,4095);} sindat = i*16 ; dac_transparent(4 ,(unsigned int )sindat); } } } void dac_ldc_ctl(unsigned int ldcdata) { DAC_LDC = ldcdata; } void dac_transparent(unsigned int DA_num ,unsigned int trans_dat) { unsigned int dactrans_flag = 0; switch (DA_num) { case 1 : DAC1_OUT = trans_dat ; dactrans_flag = 1; break; case 2 : DAC2_OUT = trans_dat ; dactrans_flag = 1; break; case 3 : DAC3_OUT = trans_dat ; dactrans_flag = 1; break; case 4 : DAC4_OUT = trans_dat ; dactrans_flag = 1; break; default : break; } if (dactrans_flag == 1){ dac_ldc_ctl(0x00); DELAY_US(0xf); dac_ldc_ctl(0xff); dactrans_flag = 0; } }