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1 | /*#######################################################################################*/ |
1 | /*#######################################################################################*/ |
2 | /* !!! THIS IS NOT FREE SOFTWARE !!! */ |
2 | /* !!! THIS IS NOT FREE SOFTWARE !!! */ |
3 | /*#######################################################################################*/ |
3 | /*#######################################################################################*/ |
4 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
4 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
5 | // + www.MikroKopter.com |
5 | // + www.MikroKopter.com |
6 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
6 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
7 | // + Software Nutzungsbedingungen (english version: see below) |
7 | // + Software Nutzungsbedingungen (english version: see below) |
8 | // + der Fa. HiSystems GmbH, Flachsmeerstrasse 2, 26802 Moormerland - nachfolgend Lizenzgeber genannt - |
8 | // + der Fa. HiSystems GmbH, Flachsmeerstrasse 2, 26802 Moormerland - nachfolgend Lizenzgeber genannt - |
9 | // + Der Lizenzgeber räumt dem Kunden ein nicht-ausschließliches, zeitlich und räumlich* unbeschränktes Recht ein, die im den |
9 | // + Der Lizenzgeber räumt dem Kunden ein nicht-ausschließliches, zeitlich und räumlich* unbeschränktes Recht ein, die im den |
10 | // + Mikrocontroller verwendete Firmware für die Hardware Flight-Ctrl, Navi-Ctrl, BL-Ctrl, MK3Mag & PC-Programm MikroKopter-Tool |
10 | // + Mikrocontroller verwendete Firmware für die Hardware Flight-Ctrl, Navi-Ctrl, BL-Ctrl, MK3Mag & PC-Programm MikroKopter-Tool |
11 | // + - nachfolgend Software genannt - nur für private Zwecke zu nutzen. |
11 | // + - nachfolgend Software genannt - nur für private Zwecke zu nutzen. |
12 | // + Der Einsatz dieser Software ist nur auf oder mit Produkten des Lizenzgebers zulässig. |
12 | // + Der Einsatz dieser Software ist nur auf oder mit Produkten des Lizenzgebers zulässig. |
13 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
13 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
14 | // + Die vom Lizenzgeber gelieferte Software ist urheberrechtlich geschützt. Alle Rechte an der Software sowie an sonstigen im |
14 | // + Die vom Lizenzgeber gelieferte Software ist urheberrechtlich geschützt. Alle Rechte an der Software sowie an sonstigen im |
15 | // + Rahmen der Vertragsanbahnung und Vertragsdurchführung überlassenen Unterlagen stehen im Verhältnis der Vertragspartner ausschließlich dem Lizenzgeber zu. |
15 | // + Rahmen der Vertragsanbahnung und Vertragsdurchführung überlassenen Unterlagen stehen im Verhältnis der Vertragspartner ausschließlich dem Lizenzgeber zu. |
16 | // + Die in der Software enthaltenen Copyright-Vermerke, Markenzeichen, andere Rechtsvorbehalte, Seriennummern sowie |
16 | // + Die in der Software enthaltenen Copyright-Vermerke, Markenzeichen, andere Rechtsvorbehalte, Seriennummern sowie |
17 | // + sonstige der Programmidentifikation dienenden Merkmale dürfen vom Kunden nicht verändert oder unkenntlich gemacht werden. |
17 | // + sonstige der Programmidentifikation dienenden Merkmale dürfen vom Kunden nicht verändert oder unkenntlich gemacht werden. |
18 | // + Der Kunde trifft angemessene Vorkehrungen für den sicheren Einsatz der Software. Er wird die Software gründlich auf deren |
18 | // + Der Kunde trifft angemessene Vorkehrungen für den sicheren Einsatz der Software. Er wird die Software gründlich auf deren |
19 | // + Verwendbarkeit zu dem von ihm beabsichtigten Zweck testen, bevor er diese operativ einsetzt. |
19 | // + Verwendbarkeit zu dem von ihm beabsichtigten Zweck testen, bevor er diese operativ einsetzt. |
20 | // + Die Haftung des Lizenzgebers wird - soweit gesetzlich zulässig - begrenzt in Höhe des typischen und vorhersehbaren |
20 | // + Die Haftung des Lizenzgebers wird - soweit gesetzlich zulässig - begrenzt in Höhe des typischen und vorhersehbaren |
21 | // + Schadens. Die gesetzliche Haftung bei Personenschäden und nach dem Produkthaftungsgesetz bleibt unberührt. Dem Lizenzgeber steht jedoch der Einwand |
21 | // + Schadens. Die gesetzliche Haftung bei Personenschäden und nach dem Produkthaftungsgesetz bleibt unberührt. Dem Lizenzgeber steht jedoch der Einwand |
22 | // + des Mitverschuldens offen. |
22 | // + des Mitverschuldens offen. |
23 | // + Der Kunde trifft angemessene Vorkehrungen für den Fall, dass die Software ganz oder teilweise nicht ordnungsgemäß arbeitet. |
23 | // + Der Kunde trifft angemessene Vorkehrungen für den Fall, dass die Software ganz oder teilweise nicht ordnungsgemäß arbeitet. |
24 | // + Er wird die Software gründlich auf deren Verwendbarkeit zu dem von ihm beabsichtigten Zweck testen, bevor er diese operativ einsetzt. |
24 | // + Er wird die Software gründlich auf deren Verwendbarkeit zu dem von ihm beabsichtigten Zweck testen, bevor er diese operativ einsetzt. |
25 | // + Der Kunde wird er seine Daten vor Einsatz der Software nach dem Stand der Technik sichern. |
25 | // + Der Kunde wird er seine Daten vor Einsatz der Software nach dem Stand der Technik sichern. |
26 | // + Der Kunde ist darüber unterrichtet, dass der Lizenzgeber seine Daten im zur Vertragsdurchführung erforderlichen Umfang |
26 | // + Der Kunde ist darüber unterrichtet, dass der Lizenzgeber seine Daten im zur Vertragsdurchführung erforderlichen Umfang |
27 | // + und auf Grundlage der Datenschutzvorschriften erhebt, speichert, verarbeitet und, sofern notwendig, an Dritte übermittelt. |
27 | // + und auf Grundlage der Datenschutzvorschriften erhebt, speichert, verarbeitet und, sofern notwendig, an Dritte übermittelt. |
28 | // + *) Die räumliche Nutzung bezieht sich nur auf den Einsatzort, nicht auf die Reichweite der programmierten Software. |
28 | // + *) Die räumliche Nutzung bezieht sich nur auf den Einsatzort, nicht auf die Reichweite der programmierten Software. |
29 | // + #### ENDE DER NUTZUNGSBEDINGUNGEN ####' |
29 | // + #### ENDE DER NUTZUNGSBEDINGUNGEN ####' |
30 | // + Hinweis: Informationen über erweiterte Nutzungsrechte (wie z.B. Nutzung für nicht-private Zwecke) sind auf Anfrage per Email an info(@)hisystems.de verfügbar. |
30 | // + Hinweis: Informationen über erweiterte Nutzungsrechte (wie z.B. Nutzung für nicht-private Zwecke) sind auf Anfrage per Email an info(@)hisystems.de verfügbar. |
31 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
31 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
32 | // + Software LICENSING TERMS |
32 | // + Software LICENSING TERMS |
33 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
33 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
34 | // + of HiSystems GmbH, Flachsmeerstrasse 2, 26802 Moormerland, Germany - the Licensor - |
34 | // + of HiSystems GmbH, Flachsmeerstrasse 2, 26802 Moormerland, Germany - the Licensor - |
35 | // + The Licensor grants the customer a non-exclusive license to use the microcontroller firmware of the Flight-Ctrl, Navi-Ctrl, BL-Ctrl, and MK3Mag hardware |
35 | // + The Licensor grants the customer a non-exclusive license to use the microcontroller firmware of the Flight-Ctrl, Navi-Ctrl, BL-Ctrl, and MK3Mag hardware |
36 | // + (the Software) exclusively for private purposes. The License is unrestricted with respect to time and territory*. |
36 | // + (the Software) exclusively for private purposes. The License is unrestricted with respect to time and territory*. |
37 | // + The Software may only be used with the Licensor's products. |
37 | // + The Software may only be used with the Licensor's products. |
38 | // + The Software provided by the Licensor is protected by copyright. With respect to the relationship between the parties to this |
38 | // + The Software provided by the Licensor is protected by copyright. With respect to the relationship between the parties to this |
39 | // + agreement, all rights pertaining to the Software and other documents provided during the preparation and execution of this |
39 | // + agreement, all rights pertaining to the Software and other documents provided during the preparation and execution of this |
40 | // + agreement shall be the property of the Licensor. |
40 | // + agreement shall be the property of the Licensor. |
41 | // + The information contained in the Software copyright notices, trademarks, other legal reservations, serial numbers and other |
41 | // + The information contained in the Software copyright notices, trademarks, other legal reservations, serial numbers and other |
42 | // + features that can be used to identify the program may not be altered or defaced by the customer. |
42 | // + features that can be used to identify the program may not be altered or defaced by the customer. |
43 | // + The customer shall be responsible for taking reasonable precautions |
43 | // + The customer shall be responsible for taking reasonable precautions |
44 | // + for the safe use of the Software. The customer shall test the Software thoroughly regarding its suitability for the |
44 | // + for the safe use of the Software. The customer shall test the Software thoroughly regarding its suitability for the |
45 | // + intended purpose before implementing it for actual operation. The Licensor's liability shall be limited to the extent of typical and |
45 | // + intended purpose before implementing it for actual operation. The Licensor's liability shall be limited to the extent of typical and |
46 | // + foreseeable damage to the extent permitted by law, notwithstanding statutory liability for bodily injury and product |
46 | // + foreseeable damage to the extent permitted by law, notwithstanding statutory liability for bodily injury and product |
47 | // + liability. However, the Licensor shall be entitled to the defense of contributory negligence. |
47 | // + liability. However, the Licensor shall be entitled to the defense of contributory negligence. |
48 | // + The customer will take adequate precautions in the case, that the software is not working properly. The customer will test |
48 | // + The customer will take adequate precautions in the case, that the software is not working properly. The customer will test |
49 | // + the software for his purpose before any operational usage. The customer will backup his data before using the software. |
49 | // + the software for his purpose before any operational usage. The customer will backup his data before using the software. |
50 | // + The customer understands that the Licensor collects, stores and processes, and, where required, forwards, customer data |
50 | // + The customer understands that the Licensor collects, stores and processes, and, where required, forwards, customer data |
51 | // + to third parties to the extent necessary for executing the agreement, subject to applicable data protection and privacy regulations. |
51 | // + to third parties to the extent necessary for executing the agreement, subject to applicable data protection and privacy regulations. |
52 | // + *) The territory aspect only refers to the place where the Software is used, not its programmed range. |
52 | // + *) The territory aspect only refers to the place where the Software is used, not its programmed range. |
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 "i2c.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" |
63 | 63 | ||
64 | 64 | ||
65 | volatile u8 I2C_State = I2C_STATE_OFF; // only one byte, because of sync by nesting irqs |
65 | volatile u8 I2C_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 I2C_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 I2C_TxBufferSize; |
70 | // number of bytes to receive |
70 | // number of bytes to receive |
71 | volatile u8 I2C_RxBufferSize; |
71 | volatile u8 I2C_RxBufferSize; |
72 | // the transfer buffer |
72 | // the transfer buffer |
73 | volatile u8 I2C_Buffer[I2C_BUFFER_LEN]; |
73 | volatile u8 I2C_Buffer[I2C_BUFFER_LEN]; |
74 | // the transfer direction |
74 | // the transfer direction |
75 | volatile u8 I2C_Direction; |
75 | volatile u8 I2C_Direction; |
76 | // the slave address |
76 | // the slave address |
77 | volatile u8 I2C_SlaveAddress = 0x00; |
77 | volatile u8 I2C_SlaveAddress = 0x00; |
78 | // function pointer to process the received bytes |
78 | // function pointer to process the received bytes |
79 | I2C_pRxHandler_t I2C_pRxHandler = NULL; |
79 | I2C_pRxHandler_t I2C_pRxHandler = NULL; |
80 | // goblal timeout |
80 | // goblal timeout |
81 | volatile u32 I2C1_Timeout = 0; |
81 | volatile u32 I2C1_Timeout = 0; |
82 | 82 | ||
83 | //-------------------------------------------------------------- |
83 | //-------------------------------------------------------------- |
84 | void I2C1_Init(void) |
84 | void I2C1_Init(void) |
85 | { |
85 | { |
86 | I2C_InitTypeDef I2C_Struct; |
86 | I2C_InitTypeDef I2C_Struct; |
87 | GPIO_InitTypeDef GPIO_InitStructure; |
87 | GPIO_InitTypeDef GPIO_InitStructure; |
88 | 88 | ||
89 | I2C_State = I2C_STATE_OFF; |
89 | I2C_State = I2C_STATE_OFF; |
90 | 90 | ||
91 | UART1_PutString("\r\n I2C init..."); |
91 | UART1_PutString("\r\n I2C init..."); |
92 | // enable Port 2 peripherie |
92 | // enable Port 2 peripherie |
93 | SCU_APBPeriphClockConfig(__GPIO2, ENABLE); |
93 | SCU_APBPeriphClockConfig(__GPIO2, ENABLE); |
94 | // disable a reset state |
94 | // disable a reset state |
95 | SCU_APBPeriphReset(__GPIO2, DISABLE); |
95 | SCU_APBPeriphReset(__GPIO2, DISABLE); |
96 | 96 | ||
97 | // free a busy bus |
97 | // free a busy bus |
98 | 98 | ||
99 | // At switch on I2C devices can get in a state where they |
99 | // At switch on I2C devices can get in a state where they |
100 | // are still waiting for a command due to all the bus lines bouncing |
100 | // are still waiting for a command due to all the bus lines bouncing |
101 | // around at startup have started clocking data into the device(s). |
101 | // around at startup have started clocking data into the device(s). |
102 | // Enable the ports as open collector port outputs |
102 | // Enable the ports as open collector port outputs |
103 | // and clock out at least 9 SCL pulses, then generate a stop |
103 | // and clock out at least 9 SCL pulses, then generate a stop |
104 | // condition and then leave the clock line high. |
104 | // condition and then leave the clock line high. |
105 | 105 | ||
106 | // configure P2.2->I2C1_CLKOUT and P2.3->I2C1_DOUT to normal port operation |
106 | // configure P2.2->I2C1_CLKOUT and P2.3->I2C1_DOUT to normal port operation |
107 | GPIO_StructInit(&GPIO_InitStructure); |
107 | GPIO_StructInit(&GPIO_InitStructure); |
108 | GPIO_InitStructure.GPIO_Direction = GPIO_PinOutput; |
108 | GPIO_InitStructure.GPIO_Direction = GPIO_PinOutput; |
109 | GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2 | GPIO_Pin_3; |
109 | GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2 | GPIO_Pin_3; |
110 | GPIO_InitStructure.GPIO_Type = GPIO_Type_OpenCollector; |
110 | GPIO_InitStructure.GPIO_Type = GPIO_Type_OpenCollector; |
111 | GPIO_InitStructure.GPIO_IPInputConnected = GPIO_IPInputConnected_Disable; |
111 | GPIO_InitStructure.GPIO_IPInputConnected = GPIO_IPInputConnected_Disable; |
112 | GPIO_InitStructure.GPIO_Alternate = GPIO_OutputAlt1; |
112 | GPIO_InitStructure.GPIO_Alternate = GPIO_OutputAlt1; |
113 | GPIO_Init(GPIO2, &GPIO_InitStructure); |
113 | GPIO_Init(GPIO2, &GPIO_InitStructure); |
114 | 114 | ||
115 | u8 i; |
115 | u8 i; |
116 | u32 delay; |
116 | u32 delay; |
117 | // set SCL high and then SDA to low (start condition) |
117 | // set SCL high and then SDA to low (start condition) |
118 | GPIO_WriteBit(GPIO2, GPIO_Pin_2, Bit_SET); |
118 | GPIO_WriteBit(GPIO2, GPIO_Pin_2, Bit_SET); |
119 | delay = SetDelay(1); |
119 | delay = SetDelay(1); |
120 | while (!CheckDelay(delay)); |
120 | while (!CheckDelay(delay)); |
121 | GPIO_WriteBit(GPIO2, GPIO_Pin_3, Bit_RESET); |
121 | GPIO_WriteBit(GPIO2, GPIO_Pin_3, Bit_RESET); |
122 | // toggle SCL at least 10 times from high to low to high |
122 | // toggle SCL at least 10 times from high to low to high |
123 | for(i = 0; i < 10; i++) |
123 | for(i = 0; i < 10; i++) |
124 | { |
124 | { |
125 | delay = SetDelay(1); |
125 | delay = SetDelay(1); |
126 | while (!CheckDelay(delay)); |
126 | while (!CheckDelay(delay)); |
127 | 127 | ||
128 | GPIO_WriteBit(GPIO2, GPIO_Pin_2, Bit_RESET); |
128 | GPIO_WriteBit(GPIO2, GPIO_Pin_2, Bit_RESET); |
129 | delay = SetDelay(1); |
129 | delay = SetDelay(1); |
130 | while (!CheckDelay(delay)); |
130 | while (!CheckDelay(delay)); |
131 | GPIO_WriteBit(GPIO2, GPIO_Pin_2, Bit_SET); |
131 | GPIO_WriteBit(GPIO2, GPIO_Pin_2, Bit_SET); |
132 | } |
132 | } |
133 | delay = SetDelay(1); |
133 | delay = SetDelay(1); |
134 | while (!CheckDelay(delay)); |
134 | while (!CheckDelay(delay)); |
135 | // create stop condition setting SDA HIGH when SCL is HIGH |
135 | // create stop condition setting SDA HIGH when SCL is HIGH |
136 | GPIO_WriteBit(GPIO2, GPIO_Pin_3, Bit_SET); |
136 | GPIO_WriteBit(GPIO2, GPIO_Pin_3, Bit_SET); |
137 | 137 | ||
138 | 138 | ||
139 | // reconfigure P2.2->I2C1_CLKOUT and P2.3->I2C1_DOUT |
139 | // reconfigure P2.2->I2C1_CLKOUT and P2.3->I2C1_DOUT |
140 | GPIO_StructInit(&GPIO_InitStructure); |
140 | GPIO_StructInit(&GPIO_InitStructure); |
141 | GPIO_InitStructure.GPIO_Direction = GPIO_PinOutput; |
141 | GPIO_InitStructure.GPIO_Direction = GPIO_PinOutput; |
142 | GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2 | GPIO_Pin_3; |
142 | GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2 | GPIO_Pin_3; |
143 | GPIO_InitStructure.GPIO_Type = GPIO_Type_OpenCollector; |
143 | GPIO_InitStructure.GPIO_Type = GPIO_Type_OpenCollector; |
144 | GPIO_InitStructure.GPIO_IPInputConnected = GPIO_IPInputConnected_Enable; |
144 | GPIO_InitStructure.GPIO_IPInputConnected = GPIO_IPInputConnected_Enable; |
145 | GPIO_InitStructure.GPIO_Alternate = GPIO_OutputAlt2; //I2C1_CLKOUT, I2C1_DOUT |
145 | GPIO_InitStructure.GPIO_Alternate = GPIO_OutputAlt2; //I2C1_CLKOUT, I2C1_DOUT |
146 | GPIO_Init(GPIO2, &GPIO_InitStructure); |
146 | GPIO_Init(GPIO2, &GPIO_InitStructure); |
147 | 147 | ||
148 | // enable I2C peripherie |
148 | // enable I2C peripherie |
149 | SCU_APBPeriphClockConfig(__I2C1,ENABLE); |
149 | SCU_APBPeriphClockConfig(__I2C1,ENABLE); |
150 | // reset I2C peripherie |
150 | // reset I2C peripherie |
151 | SCU_APBPeriphReset(__I2C1,ENABLE); |
151 | SCU_APBPeriphReset(__I2C1,ENABLE); |
152 | SCU_APBPeriphReset(__I2C1,DISABLE); |
152 | SCU_APBPeriphReset(__I2C1,DISABLE); |
153 | 153 | ||
154 | I2C_DeInit(I2C1); |
154 | I2C_DeInit(I2C1); |
155 | I2C_StructInit(&I2C_Struct); |
155 | I2C_StructInit(&I2C_Struct); |
156 | I2C_Struct.I2C_GeneralCall = I2C_GeneralCall_Disable; |
156 | I2C_Struct.I2C_GeneralCall = I2C_GeneralCall_Disable; |
157 | I2C_Struct.I2C_Ack = I2C_Ack_Enable; |
157 | I2C_Struct.I2C_Ack = I2C_Ack_Enable; |
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); |
161 | 161 | ||
162 | // empty rx and tx buffer counters |
162 | // empty rx and tx buffer counters |
163 | I2C_TxBufferSize = 0; |
163 | I2C_TxBufferSize = 0; |
164 | I2C_RxBufferSize = 0; |
164 | I2C_RxBufferSize = 0; |
165 | 165 | ||
166 | I2C_Cmd(I2C1, ENABLE); |
166 | I2C_Cmd(I2C1, ENABLE); |
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); |
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 | I2C_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 | I2C_State = I2C_STATE_BUFFBUSY; |
180 | I2C_Transmission(0,1,0,1); |
180 | I2C_Transmission(0,1,0,1); |
181 | if(I2C_WaitForEndOfTransmission(10)) break; |
181 | if(I2C_WaitForEndOfTransmission(10)) break; |
182 | UART1_Putchar('.'); |
182 | UART1_Putchar('.'); |
183 | } |
183 | } |
184 | UART1_PutString("ok"); |
184 | UART1_PutString("ok"); |
185 | } |
185 | } |
186 | 186 | ||
187 | 187 | ||
188 | //-------------------------------------------------------------- |
188 | //-------------------------------------------------------------- |
189 | void I2C1_Deinit(void) |
189 | void I2C1_Deinit(void) |
190 | { |
190 | { |
191 | GPIO_InitTypeDef GPIO_InitStructure; |
191 | GPIO_InitTypeDef GPIO_InitStructure; |
192 | UART1_PutString("\r\n I2C deinit..."); |
192 | UART1_PutString("\r\n I2C 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 | I2C_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); |
201 | 201 | ||
202 | // set ports to input |
202 | // set ports to input |
203 | SCU_APBPeriphClockConfig(__GPIO2, ENABLE); |
203 | SCU_APBPeriphClockConfig(__GPIO2, ENABLE); |
204 | GPIO_StructInit(&GPIO_InitStructure); |
204 | GPIO_StructInit(&GPIO_InitStructure); |
205 | GPIO_InitStructure.GPIO_Direction = GPIO_PinInput; |
205 | GPIO_InitStructure.GPIO_Direction = GPIO_PinInput; |
206 | GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2 | GPIO_Pin_3; |
206 | GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2 | GPIO_Pin_3; |
207 | GPIO_InitStructure.GPIO_Type = GPIO_Type_PushPull; |
207 | GPIO_InitStructure.GPIO_Type = GPIO_Type_PushPull; |
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); |
211 | 211 | ||
212 | // empty rx and tx buffer |
212 | // empty rx and tx buffer |
213 | I2C_TxBufferSize = 0; |
213 | I2C_TxBufferSize = 0; |
214 | I2C_RxBufferSize = 0; |
214 | I2C_RxBufferSize = 0; |
215 | 215 | ||
216 | I2C1_Timeout = SetDelay(10*I2C1_TIMEOUT); |
216 | I2C1_Timeout = SetDelay(10*I2C1_TIMEOUT); |
217 | 217 | ||
218 | UART1_PutString("ok"); |
218 | UART1_PutString("ok"); |
219 | } |
219 | } |
220 | 220 | ||
221 | //-------------------------------------------------------------- |
221 | //-------------------------------------------------------------- |
222 | void I2C1_IRQHandler(void) |
222 | void I2C1_IRQHandler(void) |
223 | { |
223 | { |
224 | static u8 Rx_Idx = 0, Tx_Idx = 0; |
224 | static u8 Rx_Idx = 0, Tx_Idx = 0; |
225 | u16 status; |
225 | u16 status; |
226 | 226 | ||
227 | //IENABLE; // do not enable IRQ nesting for I2C!!!! |
227 | //IENABLE; // do not enable IRQ nesting for I2C!!!! |
228 | // detemine I2C State |
228 | // detemine I2C State |
229 | status = I2C_GetLastEvent(I2C1); |
229 | status = I2C_GetLastEvent(I2C1); |
230 | 230 | ||
231 | if(status & (I2C_FLAG_AF|I2C_FLAG_BERR)) // if an acknowledge failure or bus error occured |
231 | if(status & (I2C_FLAG_AF|I2C_FLAG_BERR)) // if an acknowledge failure or bus error occured |
232 | { // Set and subsequently clear the STOP bit while BTF is set. |
232 | { // Set and subsequently clear the STOP bit while BTF is set. |
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 | I2C_State = I2C_STATE_IDLE; |
239 | I2C_Error = I2C_ERROR_NOACK; |
239 | I2C_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 |
245 | switch(status) |
245 | switch(status) |
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(I2C_Direction) |
252 | { |
252 | { |
253 | case I2C_MODE_TRANSMITTER: |
253 | case I2C_MODE_TRANSMITTER: |
254 | I2C_State = I2C_STATE_TX_PROGRESS; |
254 | I2C_State = I2C_STATE_TX_PROGRESS; |
255 | break; |
255 | break; |
256 | 256 | ||
257 | case I2C_MODE_RECEIVER: |
257 | case I2C_MODE_RECEIVER: |
258 | if (I2C_RxBufferSize == 0) // nothing to send? |
258 | if (I2C_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 | I2C_State = I2C_STATE_IDLE; |
263 | I2C_Error = I2C_ERROR_NONE; |
263 | I2C_Error = I2C_ERROR_NONE; |
264 | return; |
264 | return; |
265 | } |
265 | } |
266 | else |
266 | else |
267 | { |
267 | { |
268 | I2C_State = I2C_STATE_RX_PROGRESS; |
268 | I2C_State = I2C_STATE_RX_PROGRESS; |
269 | } |
269 | } |
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 | I2C_State = I2C_STATE_IDLE; |
276 | I2C_Error = I2C_ERROR_UNKNOWN; |
276 | I2C_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 |
282 | I2C_Send7bitAddress(I2C1, I2C_SlaveAddress, I2C_Direction); |
282 | I2C_Send7bitAddress(I2C1, I2C_SlaveAddress, I2C_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(I2C_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, I2C_Buffer[Tx_Idx]); |
295 | Tx_Idx++; |
295 | Tx_Idx++; |
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: |
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(I2C_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 | I2C_State = I2C_STATE_IDLE; |
311 | I2C_Error = I2C_ERROR_UNKNOWN; |
311 | I2C_Error = I2C_ERROR_UNKNOWN; |
312 | return; |
312 | return; |
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 < I2C_TxBufferSize) |
322 | { |
322 | { |
323 | I2C_SendData(I2C1, I2C_Buffer[Tx_Idx]); |
323 | I2C_SendData(I2C1, I2C_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 (I2C_RxBufferSize > 0) // is any answer byte expected? |
330 | { |
330 | { |
331 | I2C_Direction = I2C_MODE_RECEIVER; // switch to master receiver after repeated start condition |
331 | I2C_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 |
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 | I2C_State = I2C_STATE_IDLE; // ready for new actions |
339 | I2C_Error = I2C_ERROR_NONE; |
339 | I2C_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 < I2C_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 | I2C_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 | I2C_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(I2C_pRxHandler != NULL) (*I2C_pRxHandler)((u8*)I2C_Buffer, I2C_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 | I2C_State = I2C_STATE_IDLE; |
362 | I2C_Error = I2C_ERROR_NONE; |
362 | I2C_Error = I2C_ERROR_NONE; |
363 | return; |
363 | return; |
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) == I2C_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); |
376 | VIC_ITCmd(I2C1_ITLine, DISABLE); |
376 | VIC_ITCmd(I2C1_ITLine, DISABLE); |
377 | I2C_State = I2C_STATE_IDLE; |
377 | I2C_State = I2C_STATE_IDLE; |
378 | I2C_Error = I2C_ERROR_UNKNOWN; |
378 | I2C_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 VIC0 Vector address register |
|
383 | } |
384 | } |
384 | 385 | ||
385 | // ---------------------------------------------------------------------------------------- |
386 | // ---------------------------------------------------------------------------------------- |
386 | // wait for end of transmission |
387 | // wait for end of transmission |
387 | u8 I2C_WaitForEndOfTransmission(u32 timeout) |
388 | u8 I2C_WaitForEndOfTransmission(u32 timeout) |
388 | { |
389 | { |
389 | u32 time = SetDelay(timeout); |
390 | u32 time = SetDelay(timeout); |
390 | while(I2C_State != I2C_STATE_IDLE) |
391 | while(I2C_State != I2C_STATE_IDLE) |
391 | { |
392 | { |
392 | if(CheckDelay(time)) return(0); |
393 | if(CheckDelay(time)) return(0); |
393 | } |
394 | } |
394 | return(1); |
395 | return(1); |
395 | } |
396 | } |
396 | 397 | ||
397 | // ---------------------------------------------------------------------------------------- |
398 | // ---------------------------------------------------------------------------------------- |
398 | // 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 |
399 | // returs 1 on success and 0 on error/timeout |
400 | // returs 1 on success and 0 on error/timeout |
400 | u8 I2C_LockBuffer(u32 timeout) |
401 | u8 I2C_LockBuffer(u32 timeout) |
401 | { |
402 | { |
402 | if(I2C_WaitForEndOfTransmission(timeout)) |
403 | if(I2C_WaitForEndOfTransmission(timeout)) |
403 | { |
404 | { |
404 | I2C_State = I2C_STATE_BUFFBUSY; |
405 | I2C_State = I2C_STATE_BUFFBUSY; |
405 | I2C_Error = I2C_ERROR_UNKNOWN; |
406 | I2C_Error = I2C_ERROR_UNKNOWN; |
406 | return(1); |
407 | return(1); |
407 | } |
408 | } |
408 | else return(0); |
409 | else return(0); |
409 | } |
410 | } |
410 | // ---------------------------------------------------------------------------------------- |
411 | // ---------------------------------------------------------------------------------------- |
411 | // initate an i2c transmission |
412 | // initate an i2c transmission |
412 | u8 I2C_Transmission(u8 SlaveAddr, u8 TxBytes, I2C_pRxHandler_t pRxHandler, u8 RxBytes) |
413 | u8 I2C_Transmission(u8 SlaveAddr, u8 TxBytes, I2C_pRxHandler_t pRxHandler, u8 RxBytes) |
413 | { |
414 | { |
414 | u8 retval = 0; |
415 | u8 retval = 0; |
415 | if(I2C_State == I2C_STATE_BUFFBUSY) |
416 | if(I2C_State == I2C_STATE_BUFFBUSY) |
416 | { |
417 | { |
417 | if((RxBytes > I2C_BUFFER_LEN) || (TxBytes > I2C_BUFFER_LEN)) |
418 | if((RxBytes > I2C_BUFFER_LEN) || (TxBytes > I2C_BUFFER_LEN)) |
418 | { |
419 | { |
419 | I2C_State = I2C_STATE_IDLE; |
420 | I2C_State = I2C_STATE_IDLE; |
420 | return(retval); |
421 | return(retval); |
421 | } |
422 | } |
422 | I2C_RxBufferSize = RxBytes; |
423 | I2C_RxBufferSize = RxBytes; |
423 | I2C_TxBufferSize = TxBytes; |
424 | I2C_TxBufferSize = TxBytes; |
424 | // set direction to master transmitter |
425 | // set direction to master transmitter |
425 | if( (I2C_TxBufferSize > 0) && (I2C_TxBufferSize < I2C_BUFFER_LEN) ) I2C_Direction = I2C_MODE_TRANSMITTER; |
426 | if( (I2C_TxBufferSize > 0) && (I2C_TxBufferSize < I2C_BUFFER_LEN) ) I2C_Direction = I2C_MODE_TRANSMITTER; |
426 | else if (( I2C_RxBufferSize > 0 ) && (I2C_RxBufferSize < I2C_BUFFER_LEN) ) I2C_Direction = I2C_MODE_RECEIVER; |
427 | else if (( I2C_RxBufferSize > 0 ) && (I2C_RxBufferSize < I2C_BUFFER_LEN) ) I2C_Direction = I2C_MODE_RECEIVER; |
427 | else // nothing to send or receive |
428 | else // nothing to send or receive |
428 | { |
429 | { |
429 | I2C_State = I2C_STATE_IDLE; |
430 | I2C_State = I2C_STATE_IDLE; |
430 | I2C_Error = I2C_ERROR_NONE; |
431 | I2C_Error = I2C_ERROR_NONE; |
431 | I2C_TxBufferSize = 0; |
432 | I2C_TxBufferSize = 0; |
432 | I2C_RxBufferSize = 0; |
433 | I2C_RxBufferSize = 0; |
433 | return(retval); |
434 | return(retval); |
434 | } |
435 | } |
435 | // update slave address and rx data handler funbction pointer |
436 | // update slave address and rx data handler funbction pointer |
436 | I2C_SlaveAddress = SlaveAddr; |
437 | I2C_SlaveAddress = SlaveAddr; |
437 | I2C_pRxHandler = pRxHandler; |
438 | I2C_pRxHandler = pRxHandler; |
438 | // test on busy flag and clear it |
439 | // test on busy flag and clear it |
439 | I2C_CheckEvent( I2C1, I2C_FLAG_BUSY ); |
440 | I2C_CheckEvent( I2C1, I2C_FLAG_BUSY ); |
440 | // enable I2C IRQ |
441 | // enable I2C IRQ |
441 | VIC_ITCmd(I2C1_ITLine, ENABLE); |
442 | VIC_ITCmd(I2C1_ITLine, ENABLE); |
442 | // initiate start condition on the bus |
443 | // initiate start condition on the bus |
443 | I2C_GenerateStart(I2C1, ENABLE); |
444 | I2C_GenerateStart(I2C1, ENABLE); |
444 | retval = 1; |
445 | retval = 1; |
445 | } |
446 | } |
446 | return(retval); |
447 | return(retval); |
447 | } |
448 | } |
448 | 449 |