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comparison romdb.c @ 779:ba38e36559b0

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EEPROM writes now seem to work for NFL Quarterback Club 96
author Michael Pavone <pavone@retrodev.com>
date Mon, 20 Jul 2015 22:22:49 -0700
parents 79b10b421d3c
children fa2c03fcbb88
comparison
equal deleted inserted replaced
778:6e1711d56633 779:ba38e36559b0
97 state->state = I2C_ADDRESS_ACK; 97 state->state = I2C_ADDRESS_ACK;
98 break; 98 break;
99 case I2C_WRITE: 99 case I2C_WRITE:
100 state->buffer[state->address] = state->latch; 100 state->buffer[state->address] = state->latch;
101 state->state = I2C_WRITE_ACK; 101 state->state = I2C_WRITE_ACK;
102 state->address++;
103 //TODO: page mask
104 state->address &= state->size-1;
105 break; 102 break;
106 } 103 }
107 } 104 }
108 break; 105 break;
109 case I2C_DEVICE_ACK: 106 case I2C_DEVICE_ACK:
110 if (state->latch & 1) { 107 if (state->latch & 1) {
111 state->state = I2C_READ; 108 state->state = I2C_READ;
112 state->counter = 8; 109 state->counter = 8;
113 state->latch = state->buffer[state->address]; 110 state->latch = state->buffer[state->address];
114 state->address++;
115 //TODO: page mask
116 state->address &= state->size-1;
117 } else { 111 } else {
118 if (state->size < 256) { 112 if (state->size < 256) {
119 state->address = state->latch >> 1; 113 state->address = state->latch >> 1;
120 state->state = I2C_WRITE; 114 state->state = I2C_WRITE;
121 } else if (state->size < 8192) { 115 } else if (state->size < 4096) {
122 state->address = state->latch << 8; 116 state->address = (state->latch & 0xE) << 7;
123 state->state = I2C_ADDRESS; 117 state->state = I2C_ADDRESS;
124 } else { 118 } else {
125 state->state = I2C_ADDRESS_HI; 119 state->state = I2C_ADDRESS_HI;
126 } 120 }
127 state->counter = 8; 121 state->counter = 8;
131 state->state = I2C_ADDRESS; 125 state->state = I2C_ADDRESS;
132 state->counter = 8; 126 state->counter = 8;
133 break; 127 break;
134 case I2C_ADDRESS_ACK: 128 case I2C_ADDRESS_ACK:
135 state->state = I2C_WRITE; 129 state->state = I2C_WRITE;
130 state->address &= state->size-1;
131 printf("EEPROM address is %X\n", state->address);
136 state->counter = 8; 132 state->counter = 8;
137 break; 133 break;
138 case I2C_READ: 134 case I2C_READ:
139 state->counter--; 135 state->counter--;
140 if (!state->counter) { 136 if (!state->counter) {
142 } 138 }
143 break; 139 break;
144 case I2C_READ_ACK: 140 case I2C_READ_ACK:
145 state->state = I2C_READ; 141 state->state = I2C_READ;
146 state->counter = 8; 142 state->counter = 8;
143 state->address++;
144 //TODO: page mask
145 state->address &= state->size-1;
147 break; 146 break;
148 case I2C_WRITE_ACK: 147 case I2C_WRITE_ACK:
149 state->state = I2C_WRITE; 148 state->state = I2C_WRITE;
150 state->counter = 8; 149 state->counter = 8;
150 state->address++;
151 //TODO: page mask
152 state->address &= state->size-1;
151 break; 153 break;
152 } 154 }
153 } else if (~val & state->scl) { 155 } else if (~val & state->scl) {
154 //high to low transition 156 //high to low transition
155 switch (state->state & 0x7F) 157 switch (state->state & 0x7F)
347 expanded = value << 8; 349 expanded = value << 8;
348 mask = 0xFF00; 350 mask = 0xFF00;
349 } 351 }
350 printf("EEPROM byte write: %X - %X (using mask %X and expanded val %X)\n", address, value, mask, expanded); 352 printf("EEPROM byte write: %X - %X (using mask %X and expanded val %X)\n", address, value, mask, expanded);
351 if (map->scl_mask & mask) { 353 if (map->scl_mask & mask) {
352 printf("scl: %d, state: %s\n", (expanded & map->scl_mask) != 0, i2c_states[gen->eeprom.state]);
353 set_scl(&gen->eeprom, (expanded & map->scl_mask) != 0); 354 set_scl(&gen->eeprom, (expanded & map->scl_mask) != 0);
355 printf("scl: %d, state: %s, counter: %d, latch: %X\n", (expanded & map->scl_mask) != 0, i2c_states[gen->eeprom.state], gen->eeprom.counter, gen->eeprom.latch);
354 } 356 }
355 if (map->sda_write_mask & mask) { 357 if (map->sda_write_mask & mask) {
356 printf("sda: %d\n", (expanded & map->sda_write_mask) != 0); 358 printf("sda: %d\n", (expanded & map->sda_write_mask) != 0);
357 set_host_sda(&gen->eeprom, (expanded & map->sda_write_mask) != 0); 359 set_host_sda(&gen->eeprom, (expanded & map->sda_write_mask) != 0);
358 } 360 }