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[cpu/cc430]

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* added adc driver for cc430
dev/timer
Oliver Hahm 13 years ago
parent 9e58c8bcb7
commit be71c14f04
3 changed files with 194 additions and 0 deletions
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1
cpu/cc430/Jamfile
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@ -30,5 +30,6 @@ SubDir TOP cpu cc430 ;
Module hwtimer_cpu : hwtimer_cc430.c : hwtimer_msp430 ;
Module rtc : cc430-rtc.c ;
Module gpioint : cc430-gpioint.c ;
Module adc : cc430-adc.c : hwtimer ;
SubInclude TOP cpu msp430-common ;

149
cpu/cc430/cc430-adc.c
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/* *************************************************************************************************
*
* Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com/
*
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the
* distribution.
*
* Neither the name of Texas Instruments Incorporated nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* *************************************************************************************************
* ADC12 functions.
* ************************************************************************************************/
#include <signal.h>
#include <cpu.h>
#include <cc430-adc.h>
#include <hwtimer.h>
uint16_t adc12_result;
uint8_t adc12_data_ready;
/* *************************************************************************************************
* @fn adc12_single_conversion
* @brief Init ADC12. Do single conversion. Turn off ADC12.
* @param none
* @return none
* ************************************************************************************************/
uint16_t adc12_single_conversion(uint16_t ref, uint16_t sht, uint16_t channel) {
/* Initialize the shared reference module */
REFCTL0 |= REFMSTR + ref + REFON; /* Enable internal reference (1.5V or 2.5V) */
/* Initialize ADC12_A */
ADC12CTL0 = sht + ADC12ON; /* Set sample time */
ADC12CTL1 = ADC12SHP; /* Enable sample timer */
ADC12MCTL0 = ADC12SREF_1 + channel; /* ADC input channel */
ADC12IE = 0x001; /* ADC_IFG upon conv result-ADCMEMO */
eINT();
/* Wait 2 ticks (66us) to allow internal reference to settle */
hwtimer_wait(2);
/* Start ADC12 */
ADC12CTL0 |= ADC12ENC;
/* Clear data ready flag */
adc12_data_ready = 0;
/* Sampling and conversion start */
ADC12CTL0 |= ADC12SC;
/* Wait until ADC12 has finished */
hwtimer_wait(5);
while (!adc12_data_ready);
/* Shut down ADC12 */
ADC12CTL0 &= ~(ADC12ENC | ADC12SC | sht);
ADC12CTL0 &= ~ADC12ON;
/* Shut down reference voltage */
REFCTL0 &= ~(REFMSTR + ref + REFON);
ADC12IE = 0;
/* Return ADC result */
dINT();
return adc12_result;
}
/* *************************************************************************************************
* @fn ADC12ISR
* @brief Store ADC12 conversion result. Set flag to indicate data ready.
* @param none
* @return none
* ************************************************************************************************/
interrupt (ADC12_VECTOR) __attribute__ ((naked)) adc_isr (void) {
__enter_isr();
switch(ADC12IV) {
case 0:
break; /* Vector 0: No interrupt */
case 2:
break; /* Vector 2: ADC overflow */
case 4:
break; /* Vector 4: ADC timing overflow */
case 6:
/* Vector 6: ADC12IFG0 */
adc12_result = ADC12MEM0; /* Move results, IFG is cleared */
adc12_data_ready = 1;
break;
case 8:
break; /* Vector 8: ADC12IFG1 */
case 10:
break; /* Vector 10: ADC12IFG2 */
case 12:
break; /* Vector 12: ADC12IFG3 */
case 14:
break; /* Vector 14: ADC12IFG4 */
case 16:
break; /* Vector 16: ADC12IFG5 */
case 18:
break; /* Vector 18: ADC12IFG6 */
case 20:
break; /* Vector 20: ADC12IFG7 */
case 22:
break; /* Vector 22: ADC12IFG8 */
case 24:
break; /* Vector 24: ADC12IFG9 */
case 26:
break; /* Vector 26: ADC12IFG10 */
case 28:
break; /* Vector 28: ADC12IFG11 */
case 30:
break; /* Vector 30: ADC12IFG12 */
case 32:
break; /* Vector 32: ADC12IFG13 */
case 34:
break; /* Vector 34: ADC12IFG14 */
default:
break;
}
__exit_isr();
}

44
cpu/cc430/include/cc430-adc.h
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/* *************************************************************************************************
*
* Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com/
*
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the
* distribution.
*
* Neither the name of Texas Instruments Incorporated nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* ************************************************************************************************/
#ifndef CC430_ADC_H
#define CC430_ADC_H
extern uint16_t adc12_single_conversion(uint16_t ref, uint16_t sht, uint16_t channel);
extern uint16_t adc12_result;
extern uint8_t adc12_data_ready;
#endif
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