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Merge pull request #13173 from jeromecoutant/PR_I2C_L4R 

STM32L4: I2C init parameters for L4+ MCU
pull/13223/head
Martin Kojtal 2020-07-01 11:30:38 +02:00 committed by GitHub
parent 9ad4aa5334 0d277eefe4
commit 0e225f9298
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 18 additions and 0 deletions
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18
targets/TARGET_STM/TARGET_STM32L4/i2c_device.h
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@ -31,6 +31,7 @@
#define MBED_I2C_DEVICE_H
#include "cmsis.h"
#include "mbed_error.h"
#ifdef __cplusplus
extern "C" {
@ -82,6 +83,23 @@ static inline uint32_t get_i2c_timing(int hz)
default:
break;
}
} else if (SystemCoreClock == 120000000) {
// Common settings: I2C clock = 120 MHz, Analog filter = ON, Digital filter coefficient = 0
switch (hz) {
case 100000:
tim = 0x107075B0; // Standard mode with Rise Time = 400ns and Fall Time = 100ns
break;
case 400000:
tim = 0x00501E6C; // Fast mode with Rise Time = 250ns and Fall Time = 100ns
break;
case 1000000:
tim = 0x00200A26; // Fast mode Plus with Rise Time = 60ns and Fall Time = 100ns
break;
default:
break;
}
} else {
error("get_i2c_timing error\n");
}
return tim;
}