samp Srinivasan / Mbed 2 deprecated CDMS_CODE_samp_22Nov16

publishing to check changes in cdms code

Dependencies:   FreescaleIAP SimpleDMA mbed-rtos mbed

Fork of CDMS_CODE_samp_23SEP_DMA_flag by samp Srinivasan

i2c.h@307:6ed5535ac465, 2016-11-01 (annotated)

Committer:
spacelab
Date:
Tue Nov 01 07:18:59 2016 +0000
Revision:
307:6ed5535ac465
Parent:
303:b49b486a7107 
DMA_issue_verification

Who changed what in which revision?

UserRevisionLine numberNew contents of line
aniruddhv 52:0bd68655c651 1 #define tm_len 134
aniruddhv 52:0bd68655c651 2 #define tc_len 135
aniruddhv 52:0bd68655c651 3 #define tc_test_len 135
aniruddhv 52:0bd68655c651 4
aniruddhv 52:0bd68655c651 5 const int addr = 0x20; //slave address
ee12b079 161:a63672bf4423 6 bool write_ack = false;
ee12b079 161:a63672bf4423 7 bool read_ack = false;
ee12b079 161:a63672bf4423 8 const int addr_pl = 0x20<<1; //PL address
ee12b079 162:48fda0b8d573 9 const int addr_bae = 0x20; ///bae address
ee12b079 209:63e9c8f8b5d2 10 //uint8_t rcv_isr = 0;
aniruddhv 52:0bd68655c651 11
aniruddhv 52:0bd68655c651 12 int count = 0;
aniruddhv 52:0bd68655c651 13
ee12b079 161:a63672bf4423 14 char PL_I2C_DATA[134];//Payload i2c array
ee12b079 161:a63672bf4423 15 uint8_t PL_TM_SIZE;//size of data to bev read from i2c
ee12b079 209:63e9c8f8b5d2 16 uint32_t pdirr1;
ee12b079 209:63e9c8f8b5d2 17 uint32_t pdirw1;
aniruddhv 52:0bd68655c651 18
ee12b079 209:63e9c8f8b5d2 19 void I2C_busreset()
ee12b079 209:63e9c8f8b5d2 20 {
ee12b079 209:63e9c8f8b5d2 21 PORTE->PCR[1] &= 0xfffffffb; //Enabling high slew rates for SDA and SCL lines
ee12b079 209:63e9c8f8b5d2 22 PORTE->PCR[0] &= 0xfffffffb; //Enabling high slew rates for SDA and SCL lines
ee12b079 209:63e9c8f8b5d2 23 I2C0->C1 &= 0x7f; //Disabling I2C module
ee12b079 209:63e9c8f8b5d2 24 SIM->SCGC4 &= 0xffffffbf; //Disabling clock to I2C module
ee12b079 209:63e9c8f8b5d2 25 SIM->SCGC4 |= 0x00000040; //Enabling clock to I2C module
ee12b079 209:63e9c8f8b5d2 26 I2C0->C1 |= 0x80; //Enabling I2C module
ee12b079 209:63e9c8f8b5d2 27 PORTE->PCR[1] |= 0x00000004; //Disabling high slew rates for SDA and SCL lines
ee12b079 209:63e9c8f8b5d2 28 PORTE->PCR[0] |= 0x00000004; //Disabling high slew rates for SDA and SCL lines
ee12b079 209:63e9c8f8b5d2 29 Thread::wait(1); //Wait for all I2C registers to be updates to their their values
ee12b079 209:63e9c8f8b5d2 30 }
ee12b079 209:63e9c8f8b5d2 31 bool FCTN_I2C_READ_PL(char *data,int length) // Returns 0 for success
ee12b079 209:63e9c8f8b5d2 32 {
ee12b079 209:63e9c8f8b5d2 33 PL_I2C_GPIO = 1;
ee12b079 184:d75cea6f5d49 34 read_ack = master.read(addr_pl|1,data,length);
ee12b079 209:63e9c8f8b5d2 35 Thread::wait(1); //as per tests Thread::wait not required on master side. But its safe to give 1ms
ee12b079 209:63e9c8f8b5d2 36 pdirr1=PTE->PDIR;
ee12b079 209:63e9c8f8b5d2 37 uint8_t i2c_count = 0;
ee12b079 209:63e9c8f8b5d2 38 if(read_ack == 0) //if read_ack says success, it may or may not be successful.Hence we check SCL and SDA
ee12b079 209:63e9c8f8b5d2 39 {
ee12b079 209:63e9c8f8b5d2 40 while(((pdirr1 & 0x03000000)!=0x03000000)&& i2c_count<10)//checking SCL and SDA for time=10ms
ee12b079 209:63e9c8f8b5d2 41 {
ee12b079 209:63e9c8f8b5d2 42 Thread::wait(1);
ee12b079 209:63e9c8f8b5d2 43 pdirr1=PTE->PDIR;
ee12b079 209:63e9c8f8b5d2 44 i2c_count++;
ee12b079 209:63e9c8f8b5d2 45 }
ee12b079 209:63e9c8f8b5d2 46 if(((pdirr1 & 0x03000000)==0x03000000))//if SCL and SDA are both high
ee12b079 209:63e9c8f8b5d2 47 {
chaithanyarss 290:3159ff1081a2 48 gPC.printf("\n\rData received from PL");
ee12b079 209:63e9c8f8b5d2 49 }
ee12b079 209:63e9c8f8b5d2 50 else
ee12b079 209:63e9c8f8b5d2 51 {
ee12b079 209:63e9c8f8b5d2 52 I2C_busreset();
ee12b079 209:63e9c8f8b5d2 53 read_ack = 1;
ee12b079 209:63e9c8f8b5d2 54 }
ee12b079 209:63e9c8f8b5d2 55 }
ee12b079 209:63e9c8f8b5d2 56 else if (read_ack == 1)
ee12b079 184:d75cea6f5d49 57 {
chaithanyarss 303:b49b486a7107 58 CDMS_I2C_ERR_SPEED_COUNTER++;
ee12b079 209:63e9c8f8b5d2 59 I2C_busreset();
ee12b079 184:d75cea6f5d49 60 }
ee12b079 209:63e9c8f8b5d2 61 PL_I2C_GPIO = 0;
ee12b079 209:63e9c8f8b5d2 62 i2c_count = 0;
ee12b079 209:63e9c8f8b5d2 63 return read_ack;
ee12b079 209:63e9c8f8b5d2 64
ee12b079 184:d75cea6f5d49 65 }
ee12b079 209:63e9c8f8b5d2 66 bool FCTN_I2C_WRITE_PL(char *data2,uint8_t tc_len2) // Returns 0 for success
ee12b079 209:63e9c8f8b5d2 67 {
ee12b079 209:63e9c8f8b5d2 68 write_ack = master.write(addr_pl|0x00,data2,tc_len2);//address to be defined in payload
ee12b079 209:63e9c8f8b5d2 69 Thread::wait(1); //As per the tests Thread::wait is not required on master side but its safe to give 1ms
ee12b079 209:63e9c8f8b5d2 70 pdirw1=PTE->PDIR;
ee12b079 209:63e9c8f8b5d2 71 uint8_t i2c_count = 0;
ee12b079 209:63e9c8f8b5d2 72 if(write_ack == 0)
ee12b079 209:63e9c8f8b5d2 73 {
ee12b079 209:63e9c8f8b5d2 74 while(((pdirw1 & 0x03000000)!=0x03000000)&& i2c_count<10)
ee12b079 209:63e9c8f8b5d2 75 {
ee12b079 209:63e9c8f8b5d2 76 Thread::wait(1);
ee12b079 209:63e9c8f8b5d2 77 pdirw1=PTE->PDIR;
ee12b079 209:63e9c8f8b5d2 78 i2c_count++;
ee12b079 209:63e9c8f8b5d2 79 }
ee12b079 209:63e9c8f8b5d2 80 if(((pdirw1 & 0x03000000)==0x03000000))
ee12b079 209:63e9c8f8b5d2 81 {
ee12b079 209:63e9c8f8b5d2 82 gPC.printf("\n\r Data sent");
ee12b079 209:63e9c8f8b5d2 83 }
ee12b079 209:63e9c8f8b5d2 84 else
ee12b079 209:63e9c8f8b5d2 85 {
ee12b079 209:63e9c8f8b5d2 86 I2C_busreset();
ee12b079 209:63e9c8f8b5d2 87 write_ack = 1;
ee12b079 209:63e9c8f8b5d2 88 }
ee12b079 209:63e9c8f8b5d2 89 }
ee12b079 209:63e9c8f8b5d2 90 if (write_ack == 1)
ee12b079 209:63e9c8f8b5d2 91 {
ee12b079 209:63e9c8f8b5d2 92 I2C_busreset();
chaithanyarss 303:b49b486a7107 93 CDMS_I2C_ERR_SPEED_COUNTER++;
ee12b079 209:63e9c8f8b5d2 94 }
ee12b079 209:63e9c8f8b5d2 95 i2c_count = 0;
ee12b079 209:63e9c8f8b5d2 96 return write_ack;
ee12b079 209:63e9c8f8b5d2 97 }
ee12b079 209:63e9c8f8b5d2 98 bool FCTN_I2C_READ(char *data,int length) // Returns 0 for success
ee12b079 162:48fda0b8d573 99 {
ee12b079 162:48fda0b8d573 100 CDMS_I2C_GPIO = 1;
ee12b079 162:48fda0b8d573 101 read_ack = master.read(addr_bae|1,data,length);
ee12b079 209:63e9c8f8b5d2 102 Thread::wait(1); //as per tests Thread::wait not required on master side. But its safe to give 1ms
ee12b079 209:63e9c8f8b5d2 103 pdirr1=PTE->PDIR;
ee12b079 209:63e9c8f8b5d2 104 uint8_t i2c_count = 0;
ee12b079 209:63e9c8f8b5d2 105 if(read_ack == 0) //if read_ack says success, it may or may not be successful.Hence we check SCL and SDA
ee12b079 162:48fda0b8d573 106 {
ee12b079 209:63e9c8f8b5d2 107 while(((pdirr1 & 0x03000000)!=0x03000000)&& i2c_count<10)//checking SCL and SDA for time=10ms
ee12b079 209:63e9c8f8b5d2 108 {
ee12b079 209:63e9c8f8b5d2 109 Thread::wait(1);
ee12b079 209:63e9c8f8b5d2 110 pdirr1=PTE->PDIR;
ee12b079 209:63e9c8f8b5d2 111 i2c_count++;
ee12b079 209:63e9c8f8b5d2 112 }
ee12b079 209:63e9c8f8b5d2 113 if(((pdirr1 & 0x03000000)==0x03000000))//if SCL and SDA are both high
ee12b079 209:63e9c8f8b5d2 114 {
ee12b079 209:63e9c8f8b5d2 115 gPC.printf("\n\rData received from BAE");
ee12b079 209:63e9c8f8b5d2 116 }
ee12b079 209:63e9c8f8b5d2 117 else
ee12b079 209:63e9c8f8b5d2 118 {
ee12b079 209:63e9c8f8b5d2 119 I2C_busreset();
ee12b079 209:63e9c8f8b5d2 120 read_ack = 1;
ee12b079 209:63e9c8f8b5d2 121 }
ee12b079 162:48fda0b8d573 122 }
ee12b079 209:63e9c8f8b5d2 123 else if (read_ack == 1)
ee12b079 209:63e9c8f8b5d2 124 {
ee12b079 209:63e9c8f8b5d2 125 I2C_busreset();
chaithanyarss 303:b49b486a7107 126 CDMS_I2C_ERR_BAE_COUNTER++;
chaithanyarss 303:b49b486a7107 127
ee12b079 209:63e9c8f8b5d2 128 }
ee12b079 162:48fda0b8d573 129 CDMS_I2C_GPIO = 0;
ee12b079 209:63e9c8f8b5d2 130 i2c_count = 0;
ee12b079 198:17200a427e71 131 return read_ack;
ee12b079 162:48fda0b8d573 132 }
ee12b079 162:48fda0b8d573 133
ee12b079 209:63e9c8f8b5d2 134 bool FCTN_I2C_WRITE(char *data,int tc_len2) // Returns 0 for success
ee12b079 209:63e9c8f8b5d2 135 {
ee12b079 162:48fda0b8d573 136 CDMS_I2C_GPIO = 1;
ee12b079 209:63e9c8f8b5d2 137 write_ack = master.write(addr_bae|0x00,data,tc_len2);
ee12b079 209:63e9c8f8b5d2 138 Thread::wait(1); //As per the tests Thread::wait is not required on master side but its safe to give 1ms
ee12b079 209:63e9c8f8b5d2 139 pdirw1=PTE->PDIR;
ee12b079 209:63e9c8f8b5d2 140 uint8_t i2c_count = 0;
ee12b079 209:63e9c8f8b5d2 141 if(write_ack == 0)
ee12b079 162:48fda0b8d573 142 {
ee12b079 209:63e9c8f8b5d2 143 while(((pdirw1 & 0x03000000)!=0x03000000)&& i2c_count<10)
ee12b079 209:63e9c8f8b5d2 144 {
ee12b079 209:63e9c8f8b5d2 145 Thread::wait(1);
ee12b079 209:63e9c8f8b5d2 146 pdirw1=PTE->PDIR;
ee12b079 209:63e9c8f8b5d2 147 i2c_count++;
ee12b079 209:63e9c8f8b5d2 148 }
ee12b079 209:63e9c8f8b5d2 149 if(((pdirw1 & 0x03000000)==0x03000000))
ee12b079 209:63e9c8f8b5d2 150 {
ee12b079 209:63e9c8f8b5d2 151 gPC.printf("\n\r Data sent");
ee12b079 209:63e9c8f8b5d2 152 }
ee12b079 209:63e9c8f8b5d2 153 else
ee12b079 209:63e9c8f8b5d2 154 {
ee12b079 209:63e9c8f8b5d2 155 I2C_busreset();
ee12b079 209:63e9c8f8b5d2 156 write_ack = 1;
ee12b079 209:63e9c8f8b5d2 157 }
ee12b079 209:63e9c8f8b5d2 158 }
ee12b079 209:63e9c8f8b5d2 159 if (write_ack == 1)
ee12b079 209:63e9c8f8b5d2 160 {
ee12b079 209:63e9c8f8b5d2 161 I2C_busreset();
chaithanyarss 303:b49b486a7107 162 CDMS_I2C_ERR_BAE_COUNTER++;
ee12b079 162:48fda0b8d573 163 }
ee12b079 162:48fda0b8d573 164 CDMS_I2C_GPIO = 0;
ee12b079 209:63e9c8f8b5d2 165 i2c_count = 0;
ee12b079 209:63e9c8f8b5d2 166 return write_ack;
aniruddhv 52:0bd68655c651 167 }