استفاده از چند کانال adc در lpc1768
سلام
من این هدر رو برای خواندن 4 کانال ADC نوشتم
برای استفاده دوستان گزاشتم
کد:/*********************************************************************************************************/ #include "lpc17xx.h" /* LPC17xx definitions */ #include "adc.h" /*---------------------------------------------------------------------------- initialize ADC Pins *----------------------------------------------------------------------------*/ void ADC_Init (void) { LPC_PINCON->PINSEL1 = 0x00154000; LPC_SC->PCONP|=(1<<12); /* Enable power to ADC block */ LPC_ADC->ADCR |= 0x200000; } /*---------------------------------------------------------------------------- get converted ADC0 value *----------------------------------------------------------------------------*/ uint32_t ADC_GetCnv0 (void) { uint32_t adGdr; LPC_ADC->ADCR = 0x200F01; /* enable ADC */ /* ADC clock is 25MHz/5 */ /* select AD0.0 To 4 pin */ do { adGdr = LPC_ADC->ADDR0; // Read A/D Data Register }while ((LPC_ADC->ADGDR & 0x80000000)==0); // Wait for end of A/D Conversion return (adGdr >> 4) & ADC_VALUE_MAX; // bit 4:15 is 12 bit AD value } /*---------------------------------------------------------------------------- get converted ADC1 value *----------------------------------------------------------------------------*/ uint32_t ADC_GetCnv1 (void) { uint32_t adGdr; LPC_ADC->ADCR = 0x200F02; /* enable ADC */ /* ADC clock is 25MHz/5 */ /* select AD0.0 To 4 pin */ do { adGdr = LPC_ADC->ADDR1; // Read A/D Data Register }while ((LPC_ADC->ADGDR & 0x80000000)==0); // Wait for end of A/D Conversion return (adGdr >> 4) & ADC_VALUE_MAX; // bit 4:15 is 12 bit AD value } /*---------------------------------------------------------------------------- get converted ADC2 value *----------------------------------------------------------------------------*/ uint32_t ADC_GetCnv2 (void) { uint32_t adGdr; LPC_ADC->ADCR = 0x200F04; /* enable ADC */ /* ADC clock is 25MHz/5 */ /* select AD0.0 To 4 pin */ do { adGdr = LPC_ADC->ADDR2; // Read A/D Data Register }while ((LPC_ADC->ADGDR & 0x80000000)==0); // Wait for end of A/D Conversion return (adGdr >> 4) & ADC_VALUE_MAX; // bit 4:15 is 12 bit AD value } /*---------------------------------------------------------------------------- get converted ADC3 value *----------------------------------------------------------------------------*/ uint32_t ADC_GetCnv3 (void) { uint32_t adGdr; LPC_ADC->ADCR = 0x200F08; /* enable ADC */ /* ADC clock is 25MHz/5 */ /* select AD0.0 To 4 pin */ do { adGdr = LPC_ADC->ADDR3; // Read A/D Data Register }while ((LPC_ADC->ADGDR & 0x80000000)==0); // Wait for end of A/D Conversion return (adGdr >> 4) & ADC_VALUE_MAX; // bit 4:15 is 12 bit AD value } /*------------------------------------------------------------------------------ read a converted value from the Analog/Digital0 converter *------------------------------------------------------------------------------*/ uint16_t ADC_Get0 (void) { uint16_t val; /*---------------------------------------------------------------------------- start ADC Conversion *----------------------------------------------------------------------------*/ LPC_ADC->ADCR &= ~(7<<24); /* stop conversion */ LPC_ADC->ADCR |= (1<<24); /* start conversion */ val = ADC_GetCnv0(); /* use upper 8 bits of 12 bit AD conversion */ /*---------------------------------------------------------------------------- stop ADC Conversion *----------------------------------------------------------------------------*/ LPC_ADC->ADCR &= ~(7<<24); /* stop conversion */ return (val); } /*------------------------------------------------------------------------------ read a converted value from the Analog/Digital1 converter *------------------------------------------------------------------------------*/ uint16_t ADC_Get1 (void) { uint16_t val; /*---------------------------------------------------------------------------- start ADC Conversion *----------------------------------------------------------------------------*/ LPC_ADC->ADCR &= ~(7<<24); /* stop conversion */ LPC_ADC->ADCR |= (1<<24); /* start conversion */ val = ADC_GetCnv1(); /* use upper 8 bits of 12 bit AD conversion */ /*---------------------------------------------------------------------------- stop ADC Conversion *----------------------------------------------------------------------------*/ LPC_ADC->ADCR &= ~(7<<24); /* stop conversion */ return (val); } /*------------------------------------------------------------------------------ read a converted value from the Analog/Digital2 converter *------------------------------------------------------------------------------*/ uint16_t ADC_Get2 (void) { uint16_t val; /*---------------------------------------------------------------------------- start ADC Conversion *----------------------------------------------------------------------------*/ LPC_ADC->ADCR &= ~(7<<24); /* stop conversion */ LPC_ADC->ADCR |= (1<<24); /* start conversion */ val = ADC_GetCnv2(); /* use upper 8 bits of 12 bit AD conversion */ /*---------------------------------------------------------------------------- stop ADC Conversion *----------------------------------------------------------------------------*/ LPC_ADC->ADCR &= ~(7<<24); /* stop conversion */ return (val); } /*------------------------------------------------------------------------------ read a converted value from the Analog/Digital3 converter *------------------------------------------------------------------------------*/ uint16_t ADC_Get3 (void) { uint16_t val; /*---------------------------------------------------------------------------- start ADC Conversion *----------------------------------------------------------------------------*/ LPC_ADC->ADCR &= ~(7<<24); /* stop conversion */ LPC_ADC->ADCR |= (1<<24); /* start conversion */ val = ADC_GetCnv3(); /* use upper 8 bits of 12 bit AD conversion */ /*---------------------------------------------------------------------------- stop ADC Conversion *----------------------------------------------------------------------------*/ LPC_ADC->ADCR &= ~(7<<24); /* stop conversion */ return (val); } /********************************************************************************* ** End Of File *********************************************************************************/
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