Recent Posts 4 - Input / Output: FTM (PWM output, pulse count) 2014/08/13 3 - Input / Output: ADC (

Gyroscope ENC03 to read for example. Initialization / ************************************** *********************************** * Function Name: ADdevice_init * Function Description: AD device initialization function * Parameter Description: * Function Returns: None * Modified: 2012-2-14 * Note: initialize AD channel ************************* needed ************************************************ / void ADdevice_init () {// ENC 03 initialization PE3 adc_init (ENC_AD, ENC_X_CH);}
Below the voltage value of the gyro read AD30 times the average is stored in a global variable gyro_stand_voltage. / ************************************************* ************************ * Function Name: gyro_init * Function: duty free sydney airport The initial acquisition gyroscope bias value * Parameter Description: * Function Returns: None * Modified: 2014-3-15 * Note: just boot time, AD reading may be unstable, and then reading the first delay 2s. Fat barbecued ************************************************ ************************* / void gyro_init () {delayms (2000); gyro_stand_voltage = ad_ave (ENC_AD, ENC_X_CH, duty free sydney airport ADBITS, 30); / / vertical gyro zero bias 12bits 2000 400} XS128
To read an example gyroscope ENC03 initialization void ADC_Init (void) {ATD0CTL1 = 0b00100000;. // 10-bit precision, before sampling does not discharge, AN0 as trigger source ATD0CTL2 = 0b01000000; // flag is automatically cleared, disable external triggered interrupts disabled ATD0CTL3 = 0b10001000; // right-justified unsigned, each a sequence of conversion, No FIFO ATD0CTL4 = 0b01000100; // sampling time is 8 ATDClock //ATDClock=[BusClock*0.5]/[PRS+1 ] = 80M / 2 / (4 + 1) = 8M ATD0CTL5 = 0b00000000; // special channel disabled, single-channel sampling, single-channel conversion ATD0DIEN = 0b00000000; // disable the digital input}
The following code references duty free sydney airport the big Yang / ****************************************** ******************************* * Freescale smart car program upright walking routines * File name: [ENC03.c ] * Description: * Design gyro settings: snowwolf * Email: snowwolf2012@qq.com * Note: *************************** ********************************************* / #include "Includes .h "#include" ENC03.h "int ReadATD (unsigned char channel) // read the 01-channel AD {ATD0CTL5 duty free sydney airport = channel; while (ATD0STAT0_SCF!); return ATD0DR0;} duty free sydney airport int GetOffset () {char i, j; unsigned long temp = 0; // GYRO1 for (j = 0; j <100; j ++) // collected 100 {for (i = 0; i <31; i ++) // collected 31 times temp + = ReadATD (CHANNEL_GYRO ); Delay_ms (5); // 20ms} temp / = 64; GYRO_Vol = temp / 100.0; // reference voltage 4.96V, 496/1023/31/100 = / 6400 GYRO_Vol_Offset = GYRO_Vol; return 0;}
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