35 lines
967 B
C
35 lines
967 B
C
/* system.h -- system services */
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/* Copyright (c) 2020 Renaud Fivet */
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extern volatile unsigned uptime ; /* seconds elapsed since boot */
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int init( void) ; /* System initialization, called once at startup */
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void kputc( unsigned char c) ; /* character output */
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int kputs( const char s[]) ; /* string output */
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void yield( void) ; /* give way */
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/* GPIOA low level API ********************************************************/
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typedef enum {
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LOW = 0,
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HIGH
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} iolvl_t ;
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void gpioa_input( int pin) ; /* Configure GPIOA pin as input */
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void gpioa_output( int pin) ; /* Configure GPIOA pin as output */
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iolvl_t gpioa_read( int pin) ; /* Read level of GPIOA pin */
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void usleep( unsigned usecs) ; /* wait at least usecs us */
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typedef enum {
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VNT_INIT,
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VNT_CAL,
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VNT_RAW,
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VNT_VNC
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} vnt_cmd_t ;
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void adc_vnt( vnt_cmd_t cmd, short *ptrV, short *ptrC) ;
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/* end of system.h */
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