1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
33
34
35
44
45
46
47
48
49
50
51
52
53
54
55
56
62
63
64
69
70
71
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
102
103
104
105
106
107
108
111
112
113
116
117
118
119
120
121
122
123
124
125
126
127
128
129
134
135
141
144
145
147
148
149
150
151
152
153
158
159
165
168
169
171
172
173
174
175
176
177
182
183
189
192
193
195
196
197
198
199
200
201
202
203
204
209
210
216
219
220
222
223
224
225
226
227
228
233
234
240
243
244
246
247
248
249
250
251
252
257
258
264
267
268
270
271
272
273
274
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
300
301
307
310
311
312
313
314
315
316
317
323
326
327
328
329
330
336
339
340
341
346
347
348
349
350
351
352
353
354
355
356
357
358
359
365
368
369
370
371
372
378
381
382
383
384
385
386
391
392
393
394
395
396
397
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
433
434
435
436
437
438
439
440
441
442
443
444
445
449
450
452
453
454
455
456
457
461
462
469
480
481
488
502
503
509
518
519
520
521
522
523
524
525
526
527
537
538
539
542
543
/* ... */
#include "main.h"
/* ... */
/* ... */
Includes
#define MASTER_BOARD
#define I2C_ADDRESS 0x3E
/* ... */
#define MASTER_REQ_READ 0x12
#define MASTER_REQ_WRITE 0x34
Private macro
I2C_HandleTypeDef I2CxHandle;
uint8_t aTxBuffer[] = " ****I2C_TwoBoards advanced communication based on IT**** ****I2C_TwoBoards advanced communication based on IT**** ****I2C_TwoBoards advanced communication based on IT**** ";
uint8_t aRxBuffer[RXBUFFERSIZE];
uint16_t hTxNumData = 0, hRxNumData = 0;
uint8_t bTransferRequest = 0;
Private variables
static void SystemClock_Config(void);
static uint16_t Buffercmp(uint8_t *pBuffer1, uint8_t *pBuffer2, uint16_t BufferLength);
static void Flush_Buffer(uint8_t* pBuffer, uint16_t BufferLength);
static void Error_Handler(void);
Private function prototypes
/* ... */
int main(void)
{
/* ... */
HAL_Init();
BSP_LED_Init(LED4);
BSP_LED_Init(LED5);
SystemClock_Config();
I2CxHandle.Instance = I2Cx;
I2CxHandle.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
I2CxHandle.Init.ClockSpeed = 400000;
I2CxHandle.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
I2CxHandle.Init.DutyCycle = I2C_DUTYCYCLE_16_9;
I2CxHandle.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
I2CxHandle.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
I2CxHandle.Init.OwnAddress1 = I2C_ADDRESS;
I2CxHandle.Init.OwnAddress2 = 0;
if(HAL_I2C_Init(&I2CxHandle) != HAL_OK)
{
Error_Handler();
}if (HAL_I2C_Init(&I2CxHandle) != HAL_OK) { ... }
#ifdef MASTER_BOARD
BSP_PB_Init(BUTTON_KEY, BUTTON_MODE_GPIO);
while (BSP_PB_GetState(BUTTON_KEY) != 1)
{
}while (BSP_PB_GetState(BUTTON_KEY) != 1) { ... }
while (BSP_PB_GetState(BUTTON_KEY) != 0)
{
}while (BSP_PB_GetState(BUTTON_KEY) != 0) { ... }
while(1)
{
hTxNumData = TXBUFFERSIZE;
hRxNumData = RXBUFFERSIZE;
bTransferRequest = MASTER_REQ_WRITE;
do
{
if(HAL_I2C_Master_Transmit_IT(&I2CxHandle, (uint16_t)I2C_ADDRESS, (uint8_t*)&bTransferRequest, 1)!= HAL_OK)
{
Error_Handler();
}if (HAL_I2C_Master_Transmit_IT(&I2CxHandle, (uint16_t)I2C_ADDRESS, (uint8_t*)&bTransferRequest, 1)!= HAL_OK) { ... }
/* ... */
while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY)
{
}while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY) { ... }
/* ... */
...}
while(HAL_I2C_GetError(&I2CxHandle) == HAL_I2C_ERROR_AF);
do
{
if(HAL_I2C_Master_Transmit_IT(&I2CxHandle, (uint16_t)I2C_ADDRESS, (uint8_t*)&hTxNumData, 2)!= HAL_OK)
{
Error_Handler();
}if (HAL_I2C_Master_Transmit_IT(&I2CxHandle, (uint16_t)I2C_ADDRESS, (uint8_t*)&hTxNumData, 2)!= HAL_OK) { ... }
/* ... */
while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY)
{
}while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY) { ... }
/* ... */
...}
while(HAL_I2C_GetError(&I2CxHandle) == HAL_I2C_ERROR_AF);
do
{
if(HAL_I2C_Master_Transmit_IT(&I2CxHandle, (uint16_t)I2C_ADDRESS, (uint8_t*)aTxBuffer, TXBUFFERSIZE)!= HAL_OK)
{
Error_Handler();
}if (HAL_I2C_Master_Transmit_IT(&I2CxHandle, (uint16_t)I2C_ADDRESS, (uint8_t*)aTxBuffer, TXBUFFERSIZE)!= HAL_OK) { ... }
/* ... */
while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY)
{
}while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY) { ... }
/* ... */
...}
while(HAL_I2C_GetError(&I2CxHandle) == HAL_I2C_ERROR_AF);
bTransferRequest = MASTER_REQ_READ;
do
{
if(HAL_I2C_Master_Transmit_IT(&I2CxHandle, (uint16_t)I2C_ADDRESS, (uint8_t*)&bTransferRequest, 1)!= HAL_OK)
{
Error_Handler();
}if (HAL_I2C_Master_Transmit_IT(&I2CxHandle, (uint16_t)I2C_ADDRESS, (uint8_t*)&bTransferRequest, 1)!= HAL_OK) { ... }
/* ... */
while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY)
{
}while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY) { ... }
/* ... */
...}
while(HAL_I2C_GetError(&I2CxHandle) == HAL_I2C_ERROR_AF);
do
{
if(HAL_I2C_Master_Transmit_IT(&I2CxHandle, (uint16_t)I2C_ADDRESS, (uint8_t*)&hRxNumData, 2)!= HAL_OK)
{
Error_Handler();
}if (HAL_I2C_Master_Transmit_IT(&I2CxHandle, (uint16_t)I2C_ADDRESS, (uint8_t*)&hRxNumData, 2)!= HAL_OK) { ... }
/* ... */
while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY)
{
}while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY) { ... }
/* ... */
...}
while(HAL_I2C_GetError(&I2CxHandle) == HAL_I2C_ERROR_AF);
do
{
if(HAL_I2C_Master_Receive_IT(&I2CxHandle, (uint16_t)I2C_ADDRESS, (uint8_t*)aRxBuffer, RXBUFFERSIZE)!= HAL_OK)
{
Error_Handler();
}if (HAL_I2C_Master_Receive_IT(&I2CxHandle, (uint16_t)I2C_ADDRESS, (uint8_t*)aRxBuffer, RXBUFFERSIZE)!= HAL_OK) { ... }
/* ... */
while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY)
{
}while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY) { ... }
/* ... */
...}
while(HAL_I2C_GetError(&I2CxHandle) == HAL_I2C_ERROR_AF);
if(Buffercmp((uint8_t*)aTxBuffer,(uint8_t*)aRxBuffer,hRxNumData))
{
Error_Handler();
}if (Buffercmp((uint8_t*)aTxBuffer,(uint8_t*)aRxBuffer,hRxNumData)) { ... }
Flush_Buffer((uint8_t*)aRxBuffer,RXBUFFERSIZE);
BSP_LED_Toggle(LED4);
HAL_Delay(25);
}while (1) { ... }
/* ... */#else
while(1)
{
hTxNumData = 0;
hRxNumData = 0;
while(HAL_I2C_Slave_Receive_IT(&I2CxHandle, (uint8_t*)&bTransferRequest, 1)!= HAL_OK)
{
}while (HAL_I2C_Slave_Receive_IT(&I2CxHandle, (uint8_t*)&bTransferRequest, 1)!= HAL_OK) { ... }
/* ... */
while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY)
{
}while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY) { ... }
if (bTransferRequest == MASTER_REQ_WRITE)
{
while(HAL_I2C_Slave_Receive_IT(&I2CxHandle, (uint8_t*)&hRxNumData, 2)!= HAL_OK);
/* ... */
while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY)
{
}while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY) { ... }
while(HAL_I2C_Slave_Receive_IT(&I2CxHandle, (uint8_t*)aRxBuffer, hRxNumData)!= HAL_OK);
/* ... */
while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY)
{
}while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY) { ... }
if(Buffercmp((uint8_t*)aTxBuffer,(uint8_t*)aRxBuffer,hRxNumData))
{
Error_Handler();
}if (Buffercmp((uint8_t*)aTxBuffer,(uint8_t*)aRxBuffer,hRxNumData)) { ... }
Flush_Buffer((uint8_t*)aRxBuffer,RXBUFFERSIZE);
BSP_LED_Toggle(LED4);
}if (bTransferRequest == MASTER_REQ_WRITE) { ... }
else
{
while(HAL_I2C_Slave_Receive_IT(&I2CxHandle, (uint8_t*)&hTxNumData, 2)!= HAL_OK);
/* ... */
while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY)
{
}while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY) { ... }
while(HAL_I2C_Slave_Transmit_IT(&I2CxHandle, (uint8_t*)aTxBuffer, RXBUFFERSIZE)!= HAL_OK);
/* ... */
while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY)
{
}while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY) { ... }
}else { ... }
}while (1) { ... }
/* ... */#endif
}{ ... }
/* ... */
static void Error_Handler(void)
{
BSP_LED_Off(LED4);
BSP_LED_On(LED5);
while(1)
{
}while (1) { ... }
}{ ... }
/* ... */
static void SystemClock_Config(void)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_OscInitTypeDef RCC_OscInitStruct;
__HAL_RCC_PWR_CLK_ENABLE();
/* ... */
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSICalibrationValue = 0x10;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
RCC_OscInitStruct.PLL.PLLM = 16;
RCC_OscInitStruct.PLL.PLLN = 400;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV4;
RCC_OscInitStruct.PLL.PLLQ = 7;
if(HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) { ... }
/* ... */
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if(HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_3) != HAL_OK)
{
Error_Handler();
}if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_3) != HAL_OK) { ... }
}{ ... }
/* ... */
void HAL_I2C_ErrorCallback(I2C_HandleTypeDef *I2cHandle)
{
/* ... */
if (HAL_I2C_GetError(I2cHandle) != HAL_I2C_ERROR_AF)
{
Error_Handler();
}if (HAL_I2C_GetError(I2cHandle) != HAL_I2C_ERROR_AF) { ... }
}{ ... }
/* ... */
static uint16_t Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength)
{
while (BufferLength--)
{
if ((*pBuffer1) != *pBuffer2)
{
return BufferLength;
}if ((*pBuffer1) != *pBuffer2) { ... }
pBuffer1++;
pBuffer2++;
}while (BufferLength--) { ... }
return 0;
}{ ... }
/* ... */
static void Flush_Buffer(uint8_t* pBuffer, uint16_t BufferLength)
{
while (BufferLength--)
{
*pBuffer = 0;
pBuffer++;
}while (BufferLength--) { ... }
}{ ... }
#ifdef USE_FULL_ASSERT
/* ... */
void assert_failed(uint8_t* file, uint32_t line)
{
/* ... */
while (1)
{
}while (1) { ... }
}assert_failed (uint8_t* file, uint32_t line) { ... }
/* ... */#endif
/* ... */
/* ... */