adc_at91.h

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00001 
00041 #ifndef DRV_ADC_AT91_H
00042 #define DRV_ADC_AT91_H
00043 
00044 #include <hw/hw_cpufreq.h>
00045 
00046 #include "cfg/cfg_adc.h"
00047 
00048 #include <cfg/compiler.h>
00049 
00053 #define ADC_MUX_MAXCH          8 //Max number of channel for ADC.
00054 #define ADC_BITS              10 //Bit resolution for ADC converter.
00055 
00060 #define ADC_COMPUTED_PRESCALER    ((CPU_FREQ/(2 * CONFIG_ADC_CLOCK)) - 1)
00061 #define ADC_COMPUTED_STARTUPTIME  (((CONFIG_ADC_STARTUP_TIME * CONFIG_ADC_CLOCK)/ 8000000UL) - 1)
00062 #define ADC_COMPUTED_SHTIME       (((CONFIG_ADC_SHTIME * CONFIG_ADC_CLOCK)/1000000000UL) - 1)
00063 
00072 #if CPU_ARM_SAM7X
00073     #define ADC_PIO_DISABLE           PIOB_PDR
00074     #define ADC_PIO_EN_FUNC           PIOB_ASR
00075 
00076 #elif CPU_ARM_SAM7S_LARGE
00077     #define ADC_PIO_DISABLE           PIOA_PDR
00078     #define ADC_PIO_EN_FUNC           PIOA_BSR
00079 
00080 #else
00081     #error No ADC pins name definitions for selected ARM CPU
00082 #endif
00083 /*\}*/
00084 
00089 #define ADC_INIT_PINS() \
00090     do { \
00091     } while (0)
00092 
00093 void adc_hw_select_ch(uint8_t ch);
00094 uint16_t adc_hw_read(void);
00095 void adc_hw_init(void);
00096 
00097 #endif /* DRV_ADC_AT91_H */