arno/trezor-firmware
1
0
Fork 0
mirror of https://github.com/trezor/trezor-firmware.git synced 2024-12-21 22:08:08 +00:00
Code Issues Releases Wiki Activity

fix(core): slowdown i2c on u5 to 200kHz

Browse Source 
[no changelog]
This commit is contained in:
tychovrahe 2024-03-20 16:06:54 +01:00 committed by TychoVrahe
parent 1e53a84cfc
commit 69ed626ca0
1 changed files with 6 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
core/embed/trezorhal/stm32u5/i2c.c
View File

@ -60,8 +60,12 @@ i2c_instance_t i2c_defs[I2C_COUNT] = {
* Using calculation from STM32CubeMX * Using calculation from STM32CubeMX
* PCLKx as source, assumed 160MHz * PCLKx as source, assumed 160MHz
* Fast mode, freq = 400kHz, Rise time = 250ns, Fall time = 100ns * Fast mode, freq = 400kHz, Rise time = 250ns, Fall time = 100ns
* Fast mode, freq = 200kHz, Rise time = 250ns, Fall time = 100ns
* SCLH and SCLL are manually modified to achieve more symmetric clock
*/ */
#define I2C_TIMING_400000_Hz 0x30D2153A #define I2C_TIMING_400000_Hz 0x30D22728
#define I2C_TIMING_200000_Hz 0x30D2595A
#define I2C_TIMING I2C_TIMING_200000_Hz
void i2c_init_instance(uint16_t idx, i2c_instance_t *instance) { void i2c_init_instance(uint16_t idx, i2c_instance_t *instance) {
if (i2c_handle[idx].Instance) { if (i2c_handle[idx].Instance) {
@ -86,7 +90,7 @@ void i2c_init_instance(uint16_t idx, i2c_instance_t *instance) {
HAL_GPIO_Init(instance->SdaPort, &GPIO_InitStructure); HAL_GPIO_Init(instance->SdaPort, &GPIO_InitStructure);
i2c_handle[idx].Instance = instance->Instance; i2c_handle[idx].Instance = instance->Instance;
i2c_handle[idx].Init.Timing = I2C_TIMING_400000_Hz; i2c_handle[idx].Init.Timing = I2C_TIMING;
i2c_handle[idx].Init.OwnAddress1 = 0xFE; // master i2c_handle[idx].Init.OwnAddress1 = 0xFE; // master
i2c_handle[idx].Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT; i2c_handle[idx].Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
i2c_handle[idx].Init.DualAddressMode = I2C_DUALADDRESS_DISABLE; i2c_handle[idx].Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;