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53 | // + #### END OF LICENSING TERMS #### |
53 | // + #### END OF LICENSING TERMS #### |
54 | // + Note: For information on license extensions (e.g. commercial use), please contact us at info(@)hisystems.de. |
54 | // + Note: For information on license extensions (e.g. commercial use), please contact us at info(@)hisystems.de. |
55 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
55 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
56 | #include <string.h> |
56 | #include <string.h> |
57 | #include "91x_lib.h" |
57 | #include "91x_lib.h" |
58 | #include "i2c.h" |
58 | #include "i2c1.h" |
59 | #include "uart1.h" |
59 | #include "uart1.h" |
60 | #include "timer1.h" |
60 | #include "timer1.h" |
61 | #include "config.h" |
61 | #include "config.h" |
62 | #include "led.h" |
62 | #include "led.h" |
Line 63... | Line 63... | ||
63 | 63 | ||
64 | 64 | ||
Line 65... | Line 65... | ||
65 | volatile u8 I2C_State = I2C_STATE_OFF; // only one byte, because of sync by nesting irqs |
65 | volatile u8 I2C1_State = I2C_STATE_OFF; // only one byte, because of sync by nesting irqs |
66 | volatile u8 I2C_Error = I2C_ERROR_NOACK; // only one byte! |
66 | volatile u8 I2C1_Error = I2C_ERROR_NOACK; // only one byte! |
67 | 67 | ||
68 | // number of bytes to send |
68 | // number of bytes to send |
69 | volatile u8 I2C_TxBufferSize; |
69 | volatile u8 I2C1_TxBufferSize; |
70 | // number of bytes to receive |
70 | // number of bytes to receive |
71 | volatile u8 I2C_RxBufferSize; |
71 | volatile u8 I2C1_RxBufferSize; |
72 | // the transfer buffer |
72 | // the transfer buffer |
73 | volatile u8 I2C_Buffer[I2C_BUFFER_LEN]; |
73 | volatile u8 I2C1_Buffer[I2C1_BUFFER_LEN]; |
74 | // the transfer direction |
74 | // the transfer direction |
75 | volatile u8 I2C_Direction; |
75 | volatile u8 I2C1_Direction; |
76 | // the slave address |
76 | // the slave address |
77 | volatile u8 I2C_SlaveAddress = 0x00; |
77 | volatile u8 I2C1_SlaveAddress = 0x00; |
78 | // function pointer to process the received bytes |
78 | // function pointer to process the received bytes |
Line 79... | Line 79... | ||
79 | I2C_pRxHandler_t I2C_pRxHandler = NULL; |
79 | I2C_pRxHandler_t I2C1_pRxHandler = NULL; |
80 | // goblal timeout |
80 | // goblal timeout |
81 | volatile u32 I2C1_Timeout = 0; |
81 | volatile u32 I2C1_Timeout = 0; |
82 | 82 | ||
83 | //-------------------------------------------------------------- |
83 | //-------------------------------------------------------------- |
Line 84... | Line 84... | ||
84 | void I2C1_Init(void) |
84 | void I2C1_Init(void) |
Line 85... | Line 85... | ||
85 | { |
85 | { |
86 | I2C_InitTypeDef I2C_Struct; |
86 | I2C_InitTypeDef I2C_Struct; |
87 | GPIO_InitTypeDef GPIO_InitStructure; |
87 | GPIO_InitTypeDef GPIO_InitStructure; |
88 | 88 | ||
Line 158... | Line 158... | ||
158 | I2C_Struct.I2C_CLKSpeed = I2C1_CLOCK; |
158 | I2C_Struct.I2C_CLKSpeed = I2C1_CLOCK; |
159 | I2C_Struct.I2C_OwnAddress = 0x00; |
159 | I2C_Struct.I2C_OwnAddress = 0x00; |
160 | I2C_Init(I2C1, &I2C_Struct); |
160 | I2C_Init(I2C1, &I2C_Struct); |
Line 161... | Line 161... | ||
161 | 161 | ||
162 | // empty rx and tx buffer counters |
162 | // empty rx and tx buffer counters |
163 | I2C_TxBufferSize = 0; |
163 | I2C1_TxBufferSize = 0; |
Line 164... | Line 164... | ||
164 | I2C_RxBufferSize = 0; |
164 | I2C1_RxBufferSize = 0; |
165 | 165 | ||
Line 166... | Line 166... | ||
166 | I2C_Cmd(I2C1, ENABLE); |
166 | I2C_Cmd(I2C1, ENABLE); |
Line 167... | Line 167... | ||
167 | I2C_ITConfig(I2C1, ENABLE); |
167 | I2C_ITConfig(I2C1, ENABLE); |
168 | 168 | ||
169 | VIC_Config(I2C1_ITLine, VIC_IRQ , PRIORITY_I2C1); |
169 | VIC_Config(I2C1_ITLine, VIC_IRQ , PRIORITY_I2C1); |
Line 170... | Line 170... | ||
170 | 170 | ||
171 | I2C1_Timeout = SetDelay(10*I2C1_TIMEOUT); |
171 | I2C1_Timeout = SetDelay(10*I2C1_TIMEOUT); |
172 | I2C_GenerateSTOP(I2C1, ENABLE); |
172 | I2C_GenerateSTOP(I2C1, ENABLE); |
173 | I2C_State = I2C_STATE_IDLE; |
173 | I2C1_State = I2C_STATE_IDLE; |
174 | 174 | ||
175 | // start some dummy transmissions cycles |
175 | // start some dummy transmissions cycles |
176 | // to get the irq routine to work |
176 | // to get the irq routine to work |
177 | for(i=0;i<10;i++) |
177 | for(i=0;i<10;i++) |
178 | { |
178 | { |
179 | I2C_State = I2C_STATE_BUFFBUSY; |
179 | I2C1_State = I2C_STATE_BUFFBUSY; |
180 | I2C_Transmission(0,1,0,1); |
180 | I2C1_Transmission(0,1,0,1); |
Line 191... | Line 191... | ||
191 | GPIO_InitTypeDef GPIO_InitStructure; |
191 | GPIO_InitTypeDef GPIO_InitStructure; |
192 | UART1_PutString("\r\n I2C1 deinit..."); |
192 | UART1_PutString("\r\n I2C1 deinit..."); |
193 | I2C_GenerateStart(I2C1, DISABLE); |
193 | I2C_GenerateStart(I2C1, DISABLE); |
194 | I2C_GenerateSTOP(I2C1, ENABLE); |
194 | I2C_GenerateSTOP(I2C1, ENABLE); |
195 | VIC_ITCmd(I2C1_ITLine, DISABLE); |
195 | VIC_ITCmd(I2C1_ITLine, DISABLE); |
196 | I2C_State = I2C_STATE_OFF; |
196 | I2C1_State = I2C_STATE_OFF; |
197 | I2C_ITConfig(I2C1, DISABLE); |
197 | I2C_ITConfig(I2C1, DISABLE); |
198 | I2C_Cmd(I2C1, DISABLE); |
198 | I2C_Cmd(I2C1, DISABLE); |
199 | I2C_DeInit(I2C1); |
199 | I2C_DeInit(I2C1); |
200 | SCU_APBPeriphClockConfig(__I2C1, DISABLE); |
200 | SCU_APBPeriphClockConfig(__I2C1, DISABLE); |
Line 208... | Line 208... | ||
208 | GPIO_InitStructure.GPIO_IPInputConnected = GPIO_IPInputConnected_Disable; |
208 | GPIO_InitStructure.GPIO_IPInputConnected = GPIO_IPInputConnected_Disable; |
209 | GPIO_InitStructure.GPIO_Alternate = GPIO_InputAlt1; |
209 | GPIO_InitStructure.GPIO_Alternate = GPIO_InputAlt1; |
210 | GPIO_Init(GPIO2, &GPIO_InitStructure); |
210 | GPIO_Init(GPIO2, &GPIO_InitStructure); |
Line 211... | Line 211... | ||
211 | 211 | ||
212 | // empty rx and tx buffer |
212 | // empty rx and tx buffer |
213 | I2C_TxBufferSize = 0; |
213 | I2C1_TxBufferSize = 0; |
Line 214... | Line 214... | ||
214 | I2C_RxBufferSize = 0; |
214 | I2C1_RxBufferSize = 0; |
Line 215... | Line 215... | ||
215 | 215 | ||
216 | I2C1_Timeout = SetDelay(10*I2C1_TIMEOUT); |
216 | I2C1_Timeout = SetDelay(10*I2C1_TIMEOUT); |
Line 233... | Line 233... | ||
233 | while(I2C_GetFlagStatus (I2C1, I2C_FLAG_BTF) != RESET) |
233 | while(I2C_GetFlagStatus (I2C1, I2C_FLAG_BTF) != RESET) |
234 | { |
234 | { |
235 | I2C_GenerateSTOP (I2C1, ENABLE); // free the bus |
235 | I2C_GenerateSTOP (I2C1, ENABLE); // free the bus |
236 | I2C_GenerateSTOP (I2C1, DISABLE); // free the bus |
236 | I2C_GenerateSTOP (I2C1, DISABLE); // free the bus |
237 | } |
237 | } |
238 | I2C_State = I2C_STATE_IDLE; |
238 | I2C1_State = I2C_STATE_IDLE; |
239 | I2C_Error = I2C_ERROR_NOACK; |
239 | I2C1_Error = I2C_ERROR_NOACK; |
240 | VIC_ITCmd(I2C1_ITLine, DISABLE); |
240 | VIC_ITCmd(I2C1_ITLine, DISABLE); |
241 | return; |
241 | return; |
242 | } |
242 | } |
243 | else |
243 | else |
244 | { // depending on current i2c state |
244 | { // depending on current i2c state |
Line 246... | Line 246... | ||
246 | { |
246 | { |
247 | // the start condition was initiated on the bus |
247 | // the start condition was initiated on the bus |
248 | case I2C_EVENT_MASTER_MODE_SELECT: |
248 | case I2C_EVENT_MASTER_MODE_SELECT: |
249 | // update current bus state variable |
249 | // update current bus state variable |
250 | // jump to rx state if there is nothing to send |
250 | // jump to rx state if there is nothing to send |
251 | switch(I2C_Direction) |
251 | switch(I2C1_Direction) |
252 | { |
252 | { |
253 | case I2C_MODE_TRANSMITTER: |
253 | case I2C_MODE_TRANSMITTER: |
254 | I2C_State = I2C_STATE_TX_PROGRESS; |
254 | I2C1_State = I2C_STATE_TX_PROGRESS; |
255 | break; |
255 | break; |
Line 256... | Line 256... | ||
256 | 256 | ||
257 | case I2C_MODE_RECEIVER: |
257 | case I2C_MODE_RECEIVER: |
258 | if (I2C_RxBufferSize == 0) // nothing to send? |
258 | if (I2C1_RxBufferSize == 0) // nothing to send? |
259 | { |
259 | { |
260 | I2C_GenerateSTOP (I2C1, ENABLE); |
260 | I2C_GenerateSTOP (I2C1, ENABLE); |
261 | VIC_ITCmd(I2C1_ITLine, DISABLE); |
261 | VIC_ITCmd(I2C1_ITLine, DISABLE); |
262 | I2C_State = I2C_STATE_IDLE; |
262 | I2C1_State = I2C_STATE_IDLE; |
263 | I2C_Error = I2C_ERROR_NONE; |
263 | I2C1_Error = I2C_ERROR_NONE; |
264 | return; |
264 | return; |
265 | } |
265 | } |
266 | else |
266 | else |
267 | { |
267 | { |
268 | I2C_State = I2C_STATE_RX_PROGRESS; |
268 | I2C1_State = I2C_STATE_RX_PROGRESS; |
269 | } |
269 | } |
Line 270... | Line 270... | ||
270 | break; |
270 | break; |
271 | 271 | ||
272 | default: // invalid direction |
272 | default: // invalid direction |
273 | I2C_GenerateSTOP (I2C1, ENABLE); |
273 | I2C_GenerateSTOP (I2C1, ENABLE); |
274 | VIC_ITCmd(I2C1_ITLine, DISABLE); |
274 | VIC_ITCmd(I2C1_ITLine, DISABLE); |
275 | I2C_State = I2C_STATE_IDLE; |
275 | I2C1_State = I2C_STATE_IDLE; |
276 | I2C_Error = I2C_ERROR_UNKNOWN; |
276 | I2C1_Error = I2C_ERROR_UNKNOWN; |
277 | return; |
277 | return; |
278 | } |
278 | } |
279 | // enable acknowledge |
279 | // enable acknowledge |
280 | I2C_AcknowledgeConfig (I2C1, ENABLE); |
280 | I2C_AcknowledgeConfig (I2C1, ENABLE); |
281 | // send address/direction byte on the bus |
281 | // send address/direction byte on the bus |
Line 282... | Line 282... | ||
282 | I2C_Send7bitAddress(I2C1, I2C_SlaveAddress, I2C_Direction); |
282 | I2C_Send7bitAddress(I2C1, I2C1_SlaveAddress, I2C1_Direction); |
283 | break; |
283 | break; |
284 | 284 | ||
285 | // the address byte was send |
285 | // the address byte was send |
286 | case I2C_EVENT_MASTER_MODE_SELECTED: |
286 | case I2C_EVENT_MASTER_MODE_SELECTED: |
287 | // Clear EV6 by set again the PE bit |
287 | // Clear EV6 by set again the PE bit |
288 | I2C_Cmd(I2C1, ENABLE); |
288 | I2C_Cmd(I2C1, ENABLE); |
289 | switch(I2C_State) |
289 | switch(I2C1_State) |
290 | { |
290 | { |
291 | case I2C_STATE_TX_PROGRESS: |
291 | case I2C_STATE_TX_PROGRESS: |
292 | // send 1st data byte |
292 | // send 1st data byte |
293 | Tx_Idx = 0; |
293 | Tx_Idx = 0; |
294 | I2C_SendData(I2C1, I2C_Buffer[Tx_Idx]); |
294 | I2C_SendData(I2C1, I2C1_Buffer[Tx_Idx]); |
295 | Tx_Idx++; |
295 | Tx_Idx++; |
Line 296... | Line 296... | ||
296 | // reset timeout |
296 | // reset timeout |
297 | I2C1_Timeout = SetDelay(I2C1_TIMEOUT); // after inactivity the I2C1 bus will be reset |
297 | I2C1_Timeout = SetDelay(I2C1_TIMEOUT); // after inactivity the I2C1 bus will be reset |
298 | break; |
298 | break; |
299 | 299 | ||
300 | case I2C_STATE_RX_PROGRESS: |
300 | case I2C_STATE_RX_PROGRESS: |
Line 301... | Line 301... | ||
301 | Rx_Idx = 0; |
301 | Rx_Idx = 0; |
302 | // disable acknoledge if only one byte has to be read |
302 | // disable acknoledge if only one byte has to be read |
303 | if(I2C_RxBufferSize == 1) I2C_AcknowledgeConfig (I2C1, DISABLE); |
303 | if(I2C1_RxBufferSize == 1) I2C_AcknowledgeConfig (I2C1, DISABLE); |
304 | break; |
304 | break; |
305 | 305 | ||
306 | default: // unknown I2C state |
306 | default: // unknown I2C state |
307 | // should never happen |
307 | // should never happen |
308 | I2C_GenerateSTOP (I2C1, ENABLE); |
308 | I2C_GenerateSTOP (I2C1, ENABLE); |
309 | VIC_ITCmd(I2C1_ITLine, DISABLE); |
309 | VIC_ITCmd(I2C1_ITLine, DISABLE); |
310 | I2C_State = I2C_STATE_IDLE; |
310 | I2C1_State = I2C_STATE_IDLE; |
Line 311... | Line 311... | ||
311 | I2C_Error = I2C_ERROR_UNKNOWN; |
311 | I2C1_Error = I2C_ERROR_UNKNOWN; |
312 | return; |
312 | return; |
Line 313... | Line 313... | ||
313 | break; |
313 | break; |
314 | } |
314 | } |
315 | break; |
315 | break; |
316 | 316 | ||
317 | // the master has transmitted a byte and slave has been acknowledged |
317 | // the master has transmitted a byte and slave has been acknowledged |
318 | case I2C_EVENT_MASTER_BYTE_TRANSMITTED: |
318 | case I2C_EVENT_MASTER_BYTE_TRANSMITTED: |
319 | 319 | ||
320 | // some bytes have to be transmitted |
320 | // some bytes have to be transmitted |
321 | if(Tx_Idx < I2C_TxBufferSize) |
321 | if(Tx_Idx < I2C1_TxBufferSize) |
322 | { |
322 | { |
323 | I2C_SendData(I2C1, I2C_Buffer[Tx_Idx]); |
323 | I2C_SendData(I2C1, I2C1_Buffer[Tx_Idx]); |
324 | Tx_Idx++; |
324 | Tx_Idx++; |
325 | } |
325 | } |
326 | else // last byte was send |
326 | else // last byte was send |
327 | { |
327 | { |
328 | // generate stop or repeated start condition |
328 | // generate stop or repeated start condition |
329 | if (I2C_RxBufferSize > 0) // is any answer byte expected? |
329 | if (I2C1_RxBufferSize > 0) // is any answer byte expected? |
330 | { |
330 | { |
331 | I2C_Direction = I2C_MODE_RECEIVER; // switch to master receiver after repeated start condition |
331 | I2C1_Direction = I2C_MODE_RECEIVER; // switch to master receiver after repeated start condition |
332 | I2C_GenerateStart(I2C1, ENABLE); // initiate repeated start condition on the bus |
332 | I2C_GenerateStart(I2C1, ENABLE); // initiate repeated start condition on the bus |
333 | } |
333 | } |
334 | else |
334 | else |
335 | { // stop communication |
335 | { // stop communication |
Line 336... | Line 336... | ||
336 | I2C_GenerateSTOP(I2C1, ENABLE); // generate stop condition to free the bus |
336 | I2C_GenerateSTOP(I2C1, ENABLE); // generate stop condition to free the bus |
337 | VIC_ITCmd(I2C1_ITLine, DISABLE); |
337 | VIC_ITCmd(I2C1_ITLine, DISABLE); |
338 | I2C_State = I2C_STATE_IDLE; // ready for new actions |
338 | I2C1_State = I2C_STATE_IDLE; // ready for new actions |
339 | I2C_Error = I2C_ERROR_NONE; |
339 | I2C1_Error = I2C_ERROR_NONE; |
340 | } |
340 | } |
341 | } |
341 | } |
342 | break; |
342 | break; |
343 | 343 | ||
344 | // the master has received a byte from the slave |
344 | // the master has received a byte from the slave |
345 | case I2C_EVENT_MASTER_BYTE_RECEIVED: |
345 | case I2C_EVENT_MASTER_BYTE_RECEIVED: |
346 | // some bytes have to be received |
346 | // some bytes have to be received |
347 | if ( Rx_Idx+1 < I2C_RxBufferSize) |
347 | if ( Rx_Idx+1 < I2C1_RxBufferSize) |
348 | { // copy received byte from the data register to the rx-buffer |
348 | { // copy received byte from the data register to the rx-buffer |
349 | I2C_Buffer[Rx_Idx] = I2C_ReceiveData(I2C1); |
349 | I2C1_Buffer[Rx_Idx] = I2C_ReceiveData(I2C1); |
350 | } |
350 | } |
351 | else // if the last byte was received |
351 | else // if the last byte was received |
352 | { |
352 | { |
353 | // generate a STOP condition on the bus before reading data register |
353 | // generate a STOP condition on the bus before reading data register |
354 | I2C_GenerateSTOP(I2C1, ENABLE); |
354 | I2C_GenerateSTOP(I2C1, ENABLE); |
355 | I2C_Buffer[Rx_Idx] = I2C_ReceiveData(I2C1); |
355 | I2C1_Buffer[Rx_Idx] = I2C_ReceiveData(I2C1); |
356 | // call the rx handler function to process recieved data |
356 | // call the rx handler function to process recieved data |
357 | if(I2C_pRxHandler != NULL) (*I2C_pRxHandler)((u8*)I2C_Buffer, I2C_RxBufferSize); |
357 | if(I2C1_pRxHandler != NULL) (*I2C1_pRxHandler)((u8*)I2C1_Buffer, I2C1_RxBufferSize); |
358 | I2C1_Timeout = SetDelay(I2C1_TIMEOUT); |
358 | I2C1_Timeout = SetDelay(I2C1_TIMEOUT); |
359 | DebugOut.Analog[15]++; |
359 | DebugOut.Analog[15]++; |
360 | VIC_ITCmd(I2C1_ITLine, DISABLE); |
360 | VIC_ITCmd(I2C1_ITLine, DISABLE); |
361 | I2C_State = I2C_STATE_IDLE; |
361 | I2C1_State = I2C_STATE_IDLE; |
362 | I2C_Error = I2C_ERROR_NONE; |
362 | I2C1_Error = I2C_ERROR_NONE; |
363 | return; |
363 | return; |
Line 364... | Line 364... | ||
364 | } |
364 | } |
365 | Rx_Idx++; |
365 | Rx_Idx++; |
366 | // if the 2nd last byte was received disable acknowledge for the last one |
366 | // if the 2nd last byte was received disable acknowledge for the last one |
367 | if ( (Rx_Idx + 1) == I2C_RxBufferSize ) |
367 | if ( (Rx_Idx + 1) == I2C1_RxBufferSize ) |
368 | { |
368 | { |
369 | I2C_AcknowledgeConfig(I2C1, DISABLE); |
369 | I2C_AcknowledgeConfig(I2C1, DISABLE); |
370 | } |
370 | } |
371 | break; |
371 | break; |
372 | 372 | ||
373 | default:// unknown event |
373 | default:// unknown event |
374 | // should never happen |
374 | // should never happen |
375 | I2C_GenerateSTOP (I2C1, ENABLE); |
375 | I2C_GenerateSTOP (I2C1, ENABLE); |
Line 376... | Line 376... | ||
376 | VIC_ITCmd(I2C1_ITLine, DISABLE); |
376 | VIC_ITCmd(I2C1_ITLine, DISABLE); |
377 | I2C_State = I2C_STATE_IDLE; |
377 | I2C1_State = I2C_STATE_IDLE; |
378 | I2C_Error = I2C_ERROR_UNKNOWN; |
378 | I2C1_Error = I2C_ERROR_UNKNOWN; |
379 | break; |
379 | break; |
380 | } |
380 | } |
381 | } |
381 | } |
382 | //IDISABLE; // do not enable IRQ nesting for I2C!!!! |
382 | //IDISABLE; // do not enable IRQ nesting for I2C!!!! |
383 | VIC1->VAR = 0xFF; // write any value to VIC1 Vector address register |
383 | VIC1->VAR = 0xFF; // write any value to VIC1 Vector address register |
384 | } |
384 | } |
385 | 385 | ||
386 | // ---------------------------------------------------------------------------------------- |
386 | // ---------------------------------------------------------------------------------------- |
Line 387... | Line 387... | ||
387 | // wait for end of transmission |
387 | // wait for end of transmission |
388 | u8 I2C_WaitForEndOfTransmission(u32 timeout) |
388 | u8 I2C1_WaitForEndOfTransmission(u32 timeout) |
389 | { |
389 | { |
390 | u32 time = SetDelay(timeout); |
390 | u32 time = SetDelay(timeout); |
391 | while(I2C_State != I2C_STATE_IDLE) |
391 | while(I2C1_State != I2C_STATE_IDLE) |
392 | { |
392 | { |
393 | if(CheckDelay(time)) return(0); |
393 | if(CheckDelay(time)) return(0); |
394 | } |
394 | } |
395 | return(1); |
395 | return(1); |
396 | } |
396 | } |
397 | 397 | ||
398 | // ---------------------------------------------------------------------------------------- |
398 | // ---------------------------------------------------------------------------------------- |
399 | // try to get access to the transfer buffer within a timeout limit |
399 | // try to get access to the transfer buffer within a timeout limit |
400 | // returs 1 on success and 0 on error/timeout |
400 | // returs 1 on success and 0 on error/timeout |
401 | u8 I2C_LockBuffer(u32 timeout) |
401 | u8 I2C1_LockBuffer(u32 timeout) |
402 | { |
402 | { |
403 | if(I2C_WaitForEndOfTransmission(timeout)) |
403 | if(I2C1_WaitForEndOfTransmission(timeout)) |
404 | { |
404 | { |
405 | I2C_State = I2C_STATE_BUFFBUSY; |
405 | I2C1_State = I2C_STATE_BUFFBUSY; |
406 | I2C_Error = I2C_ERROR_UNKNOWN; |
406 | I2C1_Error = I2C_ERROR_UNKNOWN; |
407 | return(1); |
407 | return(1); |
408 | } |
408 | } |
409 | else return(0); |
409 | else return(0); |
410 | } |
410 | } |
411 | // ---------------------------------------------------------------------------------------- |
411 | // ---------------------------------------------------------------------------------------- |
412 | // initate an i2c transmission |
412 | // initate an i2c transmission |
413 | u8 I2C_Transmission(u8 SlaveAddr, u8 TxBytes, I2C_pRxHandler_t pRxHandler, u8 RxBytes) |
413 | u8 I2C1_Transmission(u8 SlaveAddr, u8 TxBytes, I2C_pRxHandler_t pRxHandler, u8 RxBytes) |
414 | { |
414 | { |
415 | u8 retval = 0; |
415 | u8 retval = 0; |
416 | if(I2C_State == I2C_STATE_BUFFBUSY) |
416 | if(I2C1_State == I2C_STATE_BUFFBUSY) |
417 | { |
417 | { |
418 | if((RxBytes > I2C_BUFFER_LEN) || (TxBytes > I2C_BUFFER_LEN)) |
418 | if((RxBytes > I2C1_BUFFER_LEN) || (TxBytes > I2C1_BUFFER_LEN)) |
419 | { |
419 | { |
420 | I2C_State = I2C_STATE_IDLE; |
420 | I2C1_State = I2C_STATE_IDLE; |
421 | return(retval); |
421 | return(retval); |
422 | } |
422 | } |
423 | I2C_RxBufferSize = RxBytes; |
423 | I2C1_RxBufferSize = RxBytes; |
424 | I2C_TxBufferSize = TxBytes; |
424 | I2C1_TxBufferSize = TxBytes; |
425 | // set direction to master transmitter |
425 | // set direction to master transmitter |
426 | if( (I2C_TxBufferSize > 0) && (I2C_TxBufferSize < I2C_BUFFER_LEN) ) I2C_Direction = I2C_MODE_TRANSMITTER; |
426 | if( (I2C1_TxBufferSize > 0) && (I2C1_TxBufferSize < I2C1_BUFFER_LEN) ) I2C1_Direction = I2C_MODE_TRANSMITTER; |
427 | else if (( I2C_RxBufferSize > 0 ) && (I2C_RxBufferSize < I2C_BUFFER_LEN) ) I2C_Direction = I2C_MODE_RECEIVER; |
427 | else if (( I2C1_RxBufferSize > 0 ) && (I2C1_RxBufferSize < I2C1_BUFFER_LEN) ) I2C1_Direction = I2C_MODE_RECEIVER; |
428 | else // nothing to send or receive |
428 | else // nothing to send or receive |
429 | { |
429 | { |
430 | I2C_State = I2C_STATE_IDLE; |
430 | I2C1_State = I2C_STATE_IDLE; |
431 | I2C_Error = I2C_ERROR_NONE; |
431 | I2C1_Error = I2C_ERROR_NONE; |
432 | I2C_TxBufferSize = 0; |
432 | I2C1_TxBufferSize = 0; |