Skip to content

STM32L4: I2C init parameters for L4+ MCU #13173

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 1 commit into from
Jul 1, 2020
Merged

STM32L4: I2C init parameters for L4+ MCU #13173

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
18 changes: 18 additions & 0 deletions targets/TARGET_STM/TARGET_STM32L4/i2c_device.h
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -31,6 +31,7 @@
#define MBED_I2C_DEVICE_H

#include "cmsis.h"
#include "mbed_error.h"

#ifdef __cplusplus
extern "C" {
Expand Down Expand Up @@ -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;
}
Expand Down