7827085947
haven't verified against a scope but they "work for me" running at 24MHz at all times now for best energy use per watt before sleeping
93 lines
2.6 KiB
C
93 lines
2.6 KiB
C
/*
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* i2c.h
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*
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* Created on: Oct 13, 2024
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* Author: true
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*/
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#ifndef USER_COMMS_I2C_H_
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#define USER_COMMS_I2C_H_
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#include "ch32x035_conf.h"
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#define SOFT_I2C_MASTER
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#ifdef SOFT_I2C_MASTER
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#include "soft_i2c_master.h"
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/* known bugs / limitations:
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* - there is no ack on address. code always assumes slave is responding.
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*/
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#define i2c_init() i2cm_init()
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#define i2c_start() { /*SetSysClock_HSI(HCLK_24MHZ);*/ i2cm_start(); }
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#define i2c_restart() i2cm_restart()
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#define i2c_stop() { i2cm_stop(); /*SetSysClock_HSI(HCLK_16MHZ);*/ }
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#define i2c_rd(ack) i2cm_rd(ack)
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#define i2c_wr(dat) i2cm_wr(dat)
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#define i2c_addr(a, w) i2c_start(); i2cm_addr(a, w)
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#define i2c_rdbuf(d, s) i2cm_rdbuf(d, s); i2c_stop()
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#define i2c_wrbuf(d, s) i2cm_wrbuf(d, s); i2c_stop()
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#define i2c_read(a, d, s) i2c_start(); \
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i2cm_addr(a, 1); \
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i2cm_rdbuf(d, s); \
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i2c_stop()
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#define i2c_read_reg8(a, r, d, s) i2c_start(); \
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i2cm_addr(a, 0); \
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i2cm_wr(r); \
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i2cm_restart(); \
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i2cm_addr(a, 1); \
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i2cm_rdbuf(d, s); \
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i2c_stop()
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#define i2c_read_reg16(a, r, d, s) i2c_start(); \
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i2cm_addr(a, 0); \
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i2cm_wr(r >> 8); \
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i2cm_wr(r & 0xff); \
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i2cm_restart(); \
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i2cm_addr(a, 1); \
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i2cm_rdbuf(d, s); \
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i2c_stop()
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#define i2c_write(a, d, s) i2c_start(); \
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i2cm_addr(a, 0); \
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i2cm_wrbuf(d, s); \
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i2c_stop()
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#define i2c_write_reg8(a, r, d, s) i2c_start(); \
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i2cm_addr(a, 0); \
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i2cm_wr(r); \
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i2cm_wrbuf(d, s); \
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i2c_stop()
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#define i2c_write_reg16(a, r, d, s) i2c_start(); \
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i2cm_addr(a, 0); \
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i2cm_wr(r >> 8); \
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i2cm_wr(r & 0xff); \
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i2cm_wrbuf(d, s); \
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i2c_stop()
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#else
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#error HW I2C NOT YET IMPLEMENTED!
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#endif
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#endif /* USER_COMMS_I2C_H_ */
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