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Fix I2C byte transfer API to enable Master/Slave test on F411RE 

i2c_byte_write could be used to send byte and address.
In case used for address, ADDR Flag should be reset.
pull/2852/head
Erwan GOURIOU 2016-09-01 17:25:45 +02:00 committed by Anna Bridge
parent ee0f0e5464
commit 9b204f8be2
3 changed files with 25 additions and 3 deletions
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21
hal/targets/hal/TARGET_STM/TARGET_STM32F4/i2c_api.c
View File

@ -213,8 +213,19 @@ inline int i2c_start(i2c_t *obj) {
inline int i2c_stop(i2c_t *obj) {
int timeout;
struct i2c_s *obj_s = I2C_S(obj);
I2C_TypeDef *i2c = (I2C_TypeDef *)obj_s->i2c;
I2C_HandleTypeDef *handle = &(obj_s->handle);
//Wait Byte transfer finished before sending stop
timeout = FLAG_TIMEOUT;
while (__HAL_I2C_GET_FLAG(handle, I2C_FLAG_BTF) == RESET) {
timeout--;
if (timeout == 0) {
return 0;
}
}
// Generate the STOP condition
i2c->CR1 |= I2C_CR1_STOP;
@ -350,15 +361,21 @@ int i2c_byte_write(i2c_t *obj, int data) {
handle->Instance->DR = (uint8_t)data;
// Wait until the byte is transmitted
// Wait until the byte (might be the adress) is transmitted
timeout = FLAG_TIMEOUT;
while ((__HAL_I2C_GET_FLAG(handle, I2C_FLAG_TXE) == RESET) &&
(__HAL_I2C_GET_FLAG(handle, I2C_FLAG_BTF) == RESET)) {
(__HAL_I2C_GET_FLAG(handle, I2C_FLAG_BTF) == RESET) &&
(__HAL_I2C_GET_FLAG(handle, I2C_FLAG_ADDR) == RESET)) {
if ((timeout--) == 0) {
return 0;
}
}
if (__HAL_I2C_GET_FLAG(handle, I2C_FLAG_ADDR) != RESET)
{
__HAL_I2C_CLEAR_ADDRFLAG(handle);
}
return 1;
}

4
libraries/tests/mbed/i2c_master_slave/main.cpp
View File

@ -16,6 +16,10 @@
// pull-up resistors on both lines
// ********************************************************
#if defined(TARGET_NUCLEO_F411RE)
I2C master(PB_9, PB_8); // I2C_1 (Arduino: D14/D15)
I2CSlave slave(PB_3, PB_10); // I2C_2 (Arduino: D3/D6)
#endif
int main()
{

3
tools/tests.py
View File

@ -87,6 +87,7 @@ Wiring:
* i2c_loop:
* LPC1768: (p28 <-> p9), (p27 <-> p10)
* NUCLEO_F411RE: (PB_9 <-> PB_3), (PB_8 <-> PB_10)
* i2c_eeprom:
* LPC1*: (SDA=p28 , SCL=p27)
@ -264,7 +265,7 @@ TESTS = [
"id": "MBED_A20", "description": "I2C master/slave test",
"source_dir": join(TEST_DIR, "mbed", "i2c_master_slave"),
"dependencies": [MBED_LIBRARIES, TEST_MBED_LIB,],
"mcu": ["LPC1768", "RZ_A1H"],
"mcu": ["LPC1768", "RZ_A1H", "NUCLEO_F411RE"],
"peripherals": ["i2c_loop"]
},
{