ARMmbed
/
mbed-os
mirror of https://github.com/ARMmbed/mbed-os.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

STM32WL : I2C full support

pull/14245/head
jeromecoutant 2021-02-03 18:08:00 +01:00
parent 96e6d8bb7b
commit 4550f92565
2 changed files with 35 additions and 34 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

44
targets/TARGET_STM/TARGET_STM32WL/i2c_device.h
View File

@ -37,36 +37,20 @@ extern "C" {
static inline uint32_t get_i2c_timing(int hz)
{
uint32_t tim = 0;
if (SystemCoreClock == 64000000) {
// Common settings: I2C clock = 64 MHz, Analog filter = ON, Digital filter coefficient = 0
switch (hz) {
case 100000:
tim = 0x10707DBC; // Standard mode with Rise Time = 400ns and Fall Time = 100ns
break;
case 400000:
tim = 0x00602173; // Fast mode with Rise Time = 250ns and Fall Time = 100ns
break;
case 1000000:
tim = 0x00300B29; // Fast mode Plus with Rise Time = 60ns and Fall Time = 100ns
break;
default:
break;
}
} else if (SystemCoreClock == 32000000) {
// Common settings: I2C clock = 32 MHz, Analog filter = ON, Digital filter coefficient = 0
switch (hz) {
case 100000:
tim = 0x00707CBB; // Standard mode with Rise Time = 400ns and Fall Time = 100ns
break;
case 400000:
tim = 0x00300F38; // Fast mode with Rise Time = 250ns and Fall Time = 100ns
break;
case 1000000:
tim = 0x00100413; // Fast mode Plus with Rise Time = 60ns and Fall Time = 100ns
break;
default:
break;
}
// Common settings: I2C clock = 48 MHz, Analog filter = ON, Digital filter coefficient = 0
switch (hz) {
case 100000:
tim = 0x20E03F53; // Standard mode with Rise Time = 640ns and Fall Time = 20ns
break;
case 400000:
tim = 0x20500817; // Fast mode with Rise Time = 250ns and Fall Time = 100ns
break;
case 1000000:
tim = 0x00500A18; // Fast mode Plus with Rise Time = 60ns and Fall Time = 100ns
break;
default:
break;
}
return tim;
}

25
targets/TARGET_STM/i2c_api.c
View File

@ -41,6 +41,7 @@
#include "PeripheralPins.h"
#include "i2c_device.h" // family specific defines
#include "mbed_error.h"
#include "platform/mbed_power_mgmt.h"
#ifndef DEBUG_STDIO
# define DEBUG_STDIO 0
@ -294,6 +295,11 @@ void i2c_init_internal(i2c_t *obj, const i2c_pinmap_t *pinmap)
// Configure I2C pins
obj_s->event_i2cIRQ = I2C1_EV_IRQn;
obj_s->error_i2cIRQ = I2C1_ER_IRQn;
#if defined(TARGET_STM32WL)
/* In Stop2 mode, I2C1 and I2C2 instances are powered down (only I2C3 register content is kept) */
sleep_manager_lock_deep_sleep();
#endif
}
#endif
#if defined I2C2_BASE
@ -303,6 +309,11 @@ void i2c_init_internal(i2c_t *obj, const i2c_pinmap_t *pinmap)
__HAL_RCC_I2C2_CLK_ENABLE();
obj_s->event_i2cIRQ = I2C2_EV_IRQn;
obj_s->error_i2cIRQ = I2C2_ER_IRQn;
#if defined(TARGET_STM32WL)
/* In Stop2 mode, I2C1 and I2C2 instances are powered down (only I2C3 register content is kept) */
sleep_manager_lock_deep_sleep();
#endif
}
#endif
#if defined I2C3_BASE
@ -380,11 +391,17 @@ void i2c_deinit_internal(i2c_t *obj)
#if defined I2C1_BASE
if (obj_s->i2c == I2C_1) {
__HAL_RCC_I2C1_CLK_DISABLE();
#if defined(TARGET_STM32WL)
sleep_manager_unlock_deep_sleep();
#endif
}
#endif
#if defined I2C2_BASE
if (obj_s->i2c == I2C_2) {
__HAL_RCC_I2C2_CLK_DISABLE();
#if defined(TARGET_STM32WL)
sleep_manager_unlock_deep_sleep();
#endif
}
#endif
#if defined I2C3_BASE
@ -758,7 +775,7 @@ int i2c_byte_read(i2c_t *obj, int last)
if ((tmpreg & I2C_CR2_RELOAD) != 0) {
while (!__HAL_I2C_GET_FLAG(handle, I2C_FLAG_TCR)) {
if ((timeout--) == 0) {
DEBUG_PRINTF("timeout in byte_read\r\n");
DEBUG_PRINTF("timeout in i2c_byte_read\r\n");
return -1;
}
}
@ -827,7 +844,7 @@ int i2c_byte_write(i2c_t *obj, int data)
if ((tmpreg & I2C_CR2_RELOAD) != 0) {
while (!__HAL_I2C_GET_FLAG(handle, I2C_FLAG_TCR)) {
if ((timeout--) == 0) {
DEBUG_PRINTF("timeout in byte_write\r\n");
DEBUG_PRINTF("timeout in i2c_byte_write\r\n");
return 2;
}
}
@ -912,7 +929,7 @@ int i2c_read(i2c_t *obj, int address, char *data, int length, int stop)
i2c_ev_err_disable(obj);
if ((timeout == 0) || (obj_s->event != I2C_EVENT_TRANSFER_COMPLETE)) {
DEBUG_PRINTF(" TIMEOUT or error in i2c_read\r\n");
DEBUG_PRINTF("TIMEOUT or error in i2c_read\r\n");
/* re-init IP to try and get back in a working state */
i2c_init_internal(obj, NULL);
} else {
@ -986,7 +1003,7 @@ int i2c_write(i2c_t *obj, int address, const char *data, int length, int stop)
count = length;
}
} else {
DEBUG_PRINTF("ERROR in i2c_read\r\n");
DEBUG_PRINTF("ERROR in i2c_write\r\n");
}
return count;