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fpr
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Update I2C files to work properly with IT
Signed-off-by: fpr <fabien.perroquin@wi6labs.com>
1 parent c78f4fa commit acc2e60

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3 files changed

+123
-50
lines changed

3 files changed

+123
-50
lines changed

‎cores/arduino/stm32/stm32_def.h‎

Lines changed: 1 addition & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -52,7 +52,6 @@
5252

5353
// Here define some compatibility
5454
#ifdef STM32F0xx
55-
#define I2C1_EV_IRQn I2C1_IRQn
5655

5756
#elif defined(STM32F1xx)
5857

@@ -65,8 +64,7 @@
6564
#elif defined(STM32F7xx)
6665

6766
#elif defined(STM32L0xx)
68-
#define I2C1_EV_IRQn I2C1_IRQn
69-
#define I2C2_EV_IRQn I2C2_IRQn
67+
7068
#elif defined(STM32L1xx)
7169

7270
#elif defined(STM32L4xx)

‎cores/arduino/stm32/twi.c‎

Lines changed: 98 additions & 45 deletions
Original file line numberDiff line numberDiff line change
@@ -101,7 +101,16 @@
101101
*/
102102

103103
/* Family specific description for I2C */
104-
#define I2C_NUM (5)
104+
#if defined(STM32F7xx) || defined(STM32L4xx)
105+
#define I2C_NUM (4)
106+
#elif defined(STM32F2xx) || defined(STM32F3xx) || defined(STM32F4xx) || defined(STM32L0xx)
107+
#define I2C_NUM (3)
108+
#elif defined(STM32F0xx) || defined(STM32F1xx) || defined(STM32L1xx)
109+
#define I2C_NUM (2)
110+
#else
111+
#error "Unknown Family - unknown I2C_NUM"
112+
#endif
113+
105114
static I2C_HandleTypeDef* i2c_handles[I2C_NUM];
106115

107116
/**
@@ -142,7 +151,6 @@ void i2c_init(i2c_t *obj)
142151
*/
143152
void i2c_custom_init(i2c_t *obj, i2c_timing_e timing, uint32_t addressingMode, uint32_t ownAddress, uint8_t master)
144153
{
145-
UNUSED(master);
146154
if(obj == NULL)
147155
return;
148156

@@ -170,53 +178,56 @@ void i2c_custom_init(i2c_t *obj, i2c_timing_e timing, uint32_t addressingMode, u
170178
#if defined I2C1_BASE
171179
// Enable I2C1 clock if not done
172180
if (obj->i2c == I2C1) {
173-
__HAL_RCC_I2C1_CLK_ENABLE();
174-
__HAL_RCC_I2C1_FORCE_RESET();
175-
__HAL_RCC_I2C1_RELEASE_RESET();
176-
obj->irq = I2C1_EV_IRQn;
177-
#ifdef STM32F1xx
178-
obj->irqER = I2C1_ER_IRQn;
179-
#endif
180-
i2c_handles[0] = handle;
181+
__HAL_RCC_I2C1_CLK_ENABLE();
182+
__HAL_RCC_I2C1_FORCE_RESET();
183+
__HAL_RCC_I2C1_RELEASE_RESET();
184+
185+
obj->irq = I2C1_EV_IRQn;
186+
#if !defined(STM32F0xx) && !defined(STM32L0xx)
187+
obj->irqER = I2C1_ER_IRQn;
188+
#endif // !defined(STM32F0xx) && !defined(STM32L0xx)
189+
i2c_handles[0] = handle;
181190
}
182-
#endif
191+
#endif // I2C1_BASE
183192
#if defined I2C2_BASE
184193
// Enable I2C2 clock if not done
185194
if (obj->i2c == I2C2) {
186-
__HAL_RCC_I2C2_CLK_ENABLE();
187-
__HAL_RCC_I2C2_FORCE_RESET();
188-
__HAL_RCC_I2C2_RELEASE_RESET();
189-
#ifdef STM32F0xx
190-
obj->irq = I2C2_IRQn;
191-
#else
192-
obj->irq = I2C2_EV_IRQn;
193-
#ifdef STM32F1xx
194-
obj->irqER = I2C2_ER_IRQn;
195-
#endif
196-
#endif
197-
i2c_handles[1] = handle;
195+
__HAL_RCC_I2C2_CLK_ENABLE();
196+
__HAL_RCC_I2C2_FORCE_RESET();
197+
__HAL_RCC_I2C2_RELEASE_RESET();
198+
obj->irq = I2C2_EV_IRQn;
199+
#if !defined(STM32F0xx) && !defined(STM32L0xx)
200+
obj->irqER = I2C2_ER_IRQn;
201+
#endif // !defined(STM32F0xx) && !defined(STM32L0xx)
202+
i2c_handles[1] = handle;
198203
}
199-
#endif
204+
#endif // I2C2_BASE
200205
#if defined I2C3_BASE
201206
// Enable I2C3 clock if not done
202207
if (obj->i2c == I2C3) {
203-
__HAL_RCC_I2C3_CLK_ENABLE();
204-
__HAL_RCC_I2C3_FORCE_RESET();
205-
__HAL_RCC_I2C3_RELEASE_RESET();
206-
obj->irq = I2C3_EV_IRQn;
207-
i2c_handles[2] = handle;
208+
__HAL_RCC_I2C3_CLK_ENABLE();
209+
__HAL_RCC_I2C3_FORCE_RESET();
210+
__HAL_RCC_I2C3_RELEASE_RESET();
211+
obj->irq = I2C3_EV_IRQn;
212+
#if !defined(STM32F0xx) && !defined(STM32L0xx)
213+
obj->irqER = I2C3_ER_IRQn;
214+
#endif // !defined(STM32F0xx) && !defined(STM32L0xx)
215+
i2c_handles[2] = handle;
208216
}
209-
#endif
217+
#endif // I2C3_BASE
210218
#if defined I2C4_BASE
211-
// Enable I2C3 clock if not done
219+
// Enable I2C4 clock if not done
212220
if (obj->i2c == I2C4) {
213-
__HAL_RCC_I2C4_CLK_ENABLE();
214-
__HAL_RCC_I2C4_FORCE_RESET();
215-
__HAL_RCC_I2C4_RELEASE_RESET();
216-
obj->irq = I2C4_EV_IRQn;
217-
i2c_handles[3] = handle;
221+
__HAL_RCC_I2C4_CLK_ENABLE();
222+
__HAL_RCC_I2C4_FORCE_RESET();
223+
__HAL_RCC_I2C4_RELEASE_RESET();
224+
obj->irq = I2C4_EV_IRQn;
225+
#if !defined(STM32F0xx) && !defined(STM32L0xx)
226+
obj->irqER = I2C4_ER_IRQn;
227+
#endif // !defined(STM32F0xx) && !defined(STM32L0xx)
228+
i2c_handles[3] = handle;
218229
}
219-
#endif
230+
#endif // I2C4_BASE
220231

221232
//SCL
222233
port = set_GPIO_Port_Clock(STM_PORT(obj->scl));
@@ -250,7 +261,7 @@ void i2c_custom_init(i2c_t *obj, i2c_timing_e timing, uint32_t addressingMode, u
250261
handle->Init.Timing = timing;
251262
#else
252263
handle->Init.ClockSpeed = timing;
253-
handle->Init.DutyCycle = I2C_DUTYCYCLE_2;//16_9;
264+
handle->Init.DutyCycle = I2C_DUTYCYCLE_2;
254265
#endif
255266
handle->Init.OwnAddress1 = ownAddress;
256267
handle->Init.OwnAddress2 = 0xFF;
@@ -263,13 +274,15 @@ void i2c_custom_init(i2c_t *obj, i2c_timing_e timing, uint32_t addressingMode, u
263274

264275
HAL_NVIC_SetPriority(obj->irq, 0, 1);
265276
HAL_NVIC_EnableIRQ(obj->irq);
266-
#ifdef STM32F1xx
277+
#if !defined(STM32F0xx) && !defined(STM32L0xx)
267278
HAL_NVIC_SetPriority(obj->irqER, 0, 1);
268279
HAL_NVIC_EnableIRQ(obj->irqER);
269-
#endif
280+
#endif // !defined(STM32F0xx) && !defined(STM32L0xx)
270281

271282
// Init the I2C
272283
HAL_I2C_Init(handle);
284+
285+
obj->isMaster = master;
273286
}
274287

275288
/**
@@ -280,9 +293,9 @@ void i2c_custom_init(i2c_t *obj, i2c_timing_e timing, uint32_t addressingMode, u
280293
void i2c_deinit(i2c_t *obj)
281294
{
282295
HAL_NVIC_DisableIRQ(obj->irq);
283-
#ifdef STM32F1xx
296+
#if !defined(STM32F0xx) && !defined(STM32L0xx)
284297
HAL_NVIC_DisableIRQ(obj->irqER);
285-
#endif
298+
#endif // !defined(STM32F0xx) && !defined(STM32L0xx)
286299
HAL_I2C_DeInit(&(obj->handle));
287300
}
288301

@@ -345,9 +358,11 @@ i2c_status_e i2c_master_write(i2c_t *obj, uint8_t dev_address,
345358
ret = I2C_OK;
346359
// wait for transfer completion
347360
while((HAL_I2C_GetState(&(obj->handle)) != HAL_I2C_STATE_READY)
348-
&& (ret != I2C_TIMEOUT)){
361+
&& (ret == I2C_OK)){
349362
if((HAL_GetTick() - tickstart) > I2C_TIMEOUT_TICK) {
350363
ret = I2C_TIMEOUT;
364+
} else if(HAL_I2C_GetError(&(obj->handle)) != HAL_I2C_ERROR_NONE) {
365+
ret = I2C_ERROR;
351366
}
352367
}
353368
}
@@ -390,9 +405,11 @@ i2c_status_e i2c_master_read(i2c_t *obj, uint8_t dev_address, uint8_t *data, uin
390405
ret = I2C_OK;
391406
// wait for transfer completion
392407
while((HAL_I2C_GetState(&(obj->handle)) != HAL_I2C_STATE_READY)
393-
&& (ret != I2C_TIMEOUT)){
408+
&& (ret == I2C_OK)){
394409
if((HAL_GetTick() - tickstart) > I2C_TIMEOUT_TICK) {
395410
ret = I2C_TIMEOUT;
411+
} else if(HAL_I2C_GetError(&(obj->handle)) != HAL_I2C_ERROR_NONE) {
412+
ret = I2C_ERROR;
396413
}
397414
}
398415
}
@@ -513,15 +530,24 @@ void HAL_I2C_ListenCpltCallback(I2C_HandleTypeDef *hi2c)
513530

514531
/**
515532
* @brief I2C error callback.
533+
* @note In master mode, the callback is not used because the error is reported
534+
* to the Arduino API from i2c_master_write() and i2c_master_read().
535+
* In slave mode, there is no mechanism in Arduino API to report an error
536+
* so the error callback forces the slave to listen again.
516537
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
517538
* the configuration information for the specified I2C.
518539
* @retval None
519540
*/
520541
void HAL_I2C_ErrorCallback(I2C_HandleTypeDef *hi2c)
521542
{
522-
HAL_I2C_EnableListen_IT(hi2c);
543+
i2c_t *obj = get_i2c_obj(hi2c);
544+
545+
if(obj->isMaster == 0) {
546+
HAL_I2C_EnableListen_IT(hi2c);
547+
}
523548
}
524549

550+
#if defined(I2C1_BASE)
525551
/**
526552
* @brief This function handles I2C1 interrupt.
527553
* @param None
@@ -531,8 +557,12 @@ void I2C1_EV_IRQHandler(void)
531557
{
532558
I2C_HandleTypeDef * handle = i2c_handles[0];
533559
HAL_I2C_EV_IRQHandler(handle);
560+
#if defined(STM32F0xx) || defined(STM32L0xx)
561+
HAL_I2C_ER_IRQHandler(handle);
562+
#endif // defined(STM32F0xx) || defined(STM32L0xx)
534563
}
535564

565+
#if !defined(STM32F0xx) && !defined(STM32L0xx)
536566
/**
537567
* @brief This function handles I2C1 interrupt.
538568
* @param None
@@ -543,7 +573,10 @@ void I2C1_ER_IRQHandler(void)
543573
I2C_HandleTypeDef * handle = i2c_handles[0];
544574
HAL_I2C_ER_IRQHandler(handle);
545575
}
576+
#endif // !defined(STM32F0xx) && !defined(STM32L0xx)
577+
#endif // I2C1_BASE
546578

579+
#if defined(I2C2_BASE)
547580
/**
548581
* @brief This function handles I2C2 interrupt.
549582
* @param None
@@ -553,8 +586,12 @@ void I2C2_EV_IRQHandler(void)
553586
{
554587
I2C_HandleTypeDef * handle = i2c_handles[1];
555588
HAL_I2C_EV_IRQHandler(handle);
589+
#if defined(STM32F0xx) || defined(STM32L0xx)
590+
HAL_I2C_ER_IRQHandler(handle);
591+
#endif // defined(STM32F0xx) || defined(STM32L0xx)
556592
}
557593

594+
#if !defined(STM32F0xx) && !defined(STM32L0xx)
558595
/**
559596
* @brief This function handles I2C2 interrupt.
560597
* @param None
@@ -565,7 +602,10 @@ void I2C2_ER_IRQHandler(void)
565602
I2C_HandleTypeDef * handle = i2c_handles[1];
566603
HAL_I2C_ER_IRQHandler(handle);
567604
}
605+
#endif // !defined(STM32F0xx) && !defined(STM32L0xx)
606+
#endif // I2C2_BASE
568607

608+
#if defined(I2C3_BASE)
569609
/**
570610
* @brief This function handles I2C3 interrupt.
571611
* @param None
@@ -575,8 +615,12 @@ void I2C3_EV_IRQHandler(void)
575615
{
576616
I2C_HandleTypeDef * handle = i2c_handles[2];
577617
HAL_I2C_EV_IRQHandler(handle);
618+
#if defined(STM32F0xx) || defined(STM32L0xx)
619+
HAL_I2C_ER_IRQHandler(handle);
620+
#endif // defined(STM32F0xx) || defined(STM32L0xx)
578621
}
579622

623+
#if !defined(STM32F0xx) && !defined(STM32L0xx)
580624
/**
581625
* @brief This function handles I2C3 interrupt.
582626
* @param None
@@ -587,7 +631,10 @@ void I2C3_ER_IRQHandler(void)
587631
I2C_HandleTypeDef * handle = i2c_handles[2];
588632
HAL_I2C_ER_IRQHandler(handle);
589633
}
634+
#endif // !defined(STM32F0xx) && !defined(STM32L0xx)
635+
#endif // I2C3_BASE
590636

637+
#if defined(I2C4_BASE)
591638
/**
592639
* @brief This function handles I2C4 interrupt.
593640
* @param None
@@ -597,8 +644,12 @@ void I2C4_EV_IRQHandler(void)
597644
{
598645
I2C_HandleTypeDef * handle = i2c_handles[3];
599646
HAL_I2C_EV_IRQHandler(handle);
647+
#if defined(STM32F0xx) || defined(STM32L0xx)
648+
HAL_I2C_ER_IRQHandler(handle);
649+
#endif // defined(STM32F0xx) || defined(STM32L0xx)
600650
}
601651

652+
#if !defined(STM32F0xx) && !defined(STM32L0xx)
602653
/**
603654
* @brief This function handles I2C4 interrupt.
604655
* @param None
@@ -609,6 +660,8 @@ void I2C4_ER_IRQHandler(void)
609660
I2C_HandleTypeDef * handle = i2c_handles[3];
610661
HAL_I2C_ER_IRQHandler(handle);
611662
}
663+
#endif // !defined(STM32F0xx) && !defined(STM32L0xx)
664+
#endif // I2C4_BASE
612665

613666
/**
614667
* @}

‎cores/arduino/stm32/twi.h‎

Lines changed: 24 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -52,8 +52,29 @@
5252
/* offsetof is a gcc built-in function, this is the manual implementation */
5353
#define OFFSETOF(type, member) ((uint32_t) (&(((type *)(0))->member)))
5454

55+
/* I2C Tx/Rx buffer size */
5556
#define I2C_TXRX_BUFFER_SIZE 32
5657

58+
/* Redefinition of IRQ for F0 & L0 family */
59+
#if defined(STM32F0xx) || defined(STM32L0xx)
60+
#if defined(I2C1_BASE)
61+
#define I2C1_EV_IRQn I2C1_IRQn
62+
#define I2C1_EV_IRQHandler I2C1_IRQHandler
63+
#endif // defined(I2C1_BASE)
64+
#if defined(I2C2_BASE)
65+
#define I2C2_EV_IRQn I2C2_IRQn
66+
#define I2C2_EV_IRQHandler I2C2_IRQHandler
67+
#endif // defined(I2C2_BASE)
68+
#if defined(I2C3_BASE)
69+
#define I2C3_EV_IRQn I2C3_IRQn
70+
#define I2C3_EV_IRQHandler I2C3_IRQHandler
71+
#endif // defined(I2C3_BASE)
72+
#if defined(I2C4_BASE)
73+
#define I2C4_EV_IRQn I2C4_IRQn
74+
#define I2C4_EV_IRQHandler I2C4_IRQHandler
75+
#endif // defined(I2C4_BASE)-
76+
#endif // defined(STM32F0xx) || defined(STM32L0xx)
77+
5778
typedef struct i2c_s i2c_t;
5879

5980
struct i2c_s {
@@ -67,10 +88,11 @@ struct i2c_s {
6788
PinName sda;
6889
PinName scl;
6990
IRQn_Type irq;
70-
#ifdef STM32F1xx
91+
#if !defined(STM32F0xx) && !defined(STM32L0xx)
7192
IRQn_Type irqER;
72-
#endif
93+
#endif //!defined(STM32F0xx) && !defined(STM32L0xx)
7394
uint8_t slaveMode;
95+
uint8_t isMaster;
7496
void (*i2c_onSlaveReceive)(uint8_t *, int);
7597
void (*i2c_onSlaveTransmit)(void);
7698
uint8_t i2cTxRxBuffer[I2C_TXRX_BUFFER_SIZE];

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