23 lines
No EOL
710 B
C
23 lines
No EOL
710 B
C
/*
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* Feb 2017, Karl Palsson <karlp@tweak.net.au>
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*/
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#include <libopencm3/stm32/i2c.h>
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#include <libopencm3/stm32/rcc.h>
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#include "hw.h"
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#include "i2c-master.h"
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void i2cm_init(void) {
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rcc_periph_clock_enable(hw_details.periph_rcc);
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rcc_periph_reset_pulse(hw_details.periph_rst);
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i2c_set_standard_mode(hw_details.periph);
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i2c_enable_ack(hw_details.periph);
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//i2c_set_dutycycle(hw_details.periph, I2C_CCR_DUTY_DIV2); /* default, no need to do this really */
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i2c_set_clock_frequency(hw_details.periph, I2C_CR2_FREQ_42MHZ);
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/* 42MHz / (100kHz * 2) */
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i2c_set_ccr(hw_details.periph, 210);
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/* standard mode, freqMhz+1*/
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i2c_set_trise(hw_details.periph, 43);
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i2c_peripheral_enable(hw_details.periph);
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} |