44 lines
1.4 KiB
C
44 lines
1.4 KiB
C
#ifndef __MAX2837_H
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#define __MAX2837_H
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/* TODO - make this a private header for max2837.c only, make new max2837.h */
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/* 32 registers, each containing 10 bits of data. */
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#define MAX2837_NUM_REGS 32
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/* TODO - these externs will be local to max2837.c ... don't define here? */
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extern uint16_t max2837_regs[MAX2837_NUM_REGS];
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extern uint32_t max2837_regs_dirty;
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#define MAX2837_REG_SET_CLEAN(r) max2837_regs_dirty &= ~(1UL<<r)
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#define MAX2837_REG_SET_DIRTY(r) max2837_regs_dirty |= (1UL<<r)
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/* Initialize chip. */
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extern void max2837_init(void);
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/* Read a register via SPI. Save a copy to memory and return
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* value. Mark clean. */
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extern uint16_t max2837_reg_read(uint8_t r);
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/* Write value to register via SPI and save a copy to memory. Mark
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* clean. */
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extern void max2837_reg_write(uint8_t r, uint16_t v);
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/* Read all registers from chip and copy to memory. Mark all clean. */
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extern void max2837_regs_read(void);
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/* Write all dirty registers via SPI from memory. Mark all clean. Some
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* operations require registers to be written in a certain order. Use
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* provided routines for those operations. */
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extern void max2837_regs_commit(void);
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/* Turn on/off all chip functions. Does not control oscillator and CLKOUT */
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extern void max2837_start(void);
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extern void max2837_stop(void);
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/* Set frequency in Hz. Frequency setting is a multi-step function
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* where order of register writes matters. */
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extern void max2837_set_frequency(uint32_t freq);
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#endif // __MAX2837_H
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