| wdenk | 012771d | 2002-03-08 21:31:05 +0000 | [diff] [blame^] | 1 | /* By Thomas.Lange@Corelatus.com 001025 |
| 2 | $Revision: 1.6 $ |
| 3 | |
| 4 | Definitions for EEPROM/VOLT METER DS2438 |
| 5 | Copyright (C) 2000-2001 Corelatus AB */ |
| 6 | |
| 7 | #ifndef INCeedevh |
| 8 | #define INCeedevh |
| 9 | |
| 10 | #define E_DEBUG(fmt,args...) if( Debug ) printk(KERN_DEBUG"EE: " fmt, ##args) |
| 11 | |
| 12 | #define PORT_B_PAR ((volatile immap_t *)CFG_IMMR)->im_cpm.cp_pbpar |
| 13 | #define PORT_B_ODR ((volatile immap_t *)CFG_IMMR)->im_cpm.cp_pbodr |
| 14 | #define PORT_B_DIR ((volatile immap_t *)CFG_IMMR)->im_cpm.cp_pbdir |
| 15 | #define PORT_B_DAT ((volatile immap_t *)CFG_IMMR)->im_cpm.cp_pbdat |
| 16 | |
| 17 | #define SET_PORT_B_INPUT(Mask) PORT_B_DIR &= ~(Mask) |
| 18 | #define SET_PORT_B_OUTPUT(Mask) PORT_B_DIR |= Mask |
| 19 | |
| 20 | #define WRITE_PORT_B(Mask,Value) { \ |
| 21 | if (Value) PORT_B_DAT |= Mask; \ |
| 22 | else PORT_B_DAT &= ~(Mask); \ |
| 23 | } |
| 24 | #define WRITE_PORT(Value) WRITE_PORT_B(PB_EEPROM,Value) |
| 25 | |
| 26 | #define READ_PORT (PORT_B_DAT&PB_EEPROM) |
| 27 | |
| 28 | /* 64 bytes chip */ |
| 29 | #define EE_CHIP_SIZE 64 |
| 30 | |
| 31 | /* We use this resistor for measuring the current drain on 3.3V */ |
| 32 | #define CURRENT_RESISTOR 0.022 |
| 33 | |
| 34 | /* microsecs |
| 35 | Pull line down at least this long for reset pulse */ |
| 36 | #define RESET_LOW_TIME 490 |
| 37 | |
| 38 | /* Read presence pulse after we release reset pulse */ |
| 39 | #define PRESENCE_TIMEOUT 100 |
| 40 | #define PRESENCE_LOW_TIME 200 |
| 41 | |
| 42 | #define WRITE_0_LOW 80 |
| 43 | #define WRITE_1_LOW 2 |
| 44 | #define TOTAL_WRITE_LOW 80 |
| 45 | |
| 46 | #define READ_LOW 2 |
| 47 | #define READ_TIMEOUT 10 |
| 48 | #define TOTAL_READ_LOW 80 |
| 49 | |
| 50 | /*** Rom function commands ***/ |
| 51 | #define READ_ROM 0x33 |
| 52 | #define MATCH_ROM 0x55 |
| 53 | #define SKIP_ROM 0xCC |
| 54 | #define SEARCH_ROM 0xF0 |
| 55 | |
| 56 | |
| 57 | /*** Memory_command_function ***/ |
| 58 | #define WRITE_SCRATCHPAD 0x4E |
| 59 | #define READ_SCRATCHPAD 0xBE |
| 60 | #define COPY_SCRATCHPAD 0x48 |
| 61 | #define RECALL_MEMORY 0xB8 |
| 62 | #define CONVERT_TEMP 0x44 |
| 63 | #define CONVERT_VOLTAGE 0xB4 |
| 64 | |
| 65 | /* Chip is divided in 8 pages, 8 bytes each */ |
| 66 | |
| 67 | #define EE_PAGE_SIZE 8 |
| 68 | |
| 69 | /* All chip data we want are in page 0 */ |
| 70 | |
| 71 | /* Bytes in page 0 */ |
| 72 | #define EE_P0_STATUS 0 |
| 73 | #define EE_P0_TEMP_LSB 1 |
| 74 | #define EE_P0_TEMP_MSB 2 |
| 75 | #define EE_P0_VOLT_LSB 3 |
| 76 | #define EE_P0_VOLT_MSB 4 |
| 77 | #define EE_P0_CURRENT_LSB 5 |
| 78 | #define EE_P0_CURRENT_MSB 6 |
| 79 | |
| 80 | |
| 81 | /* 40 byte user data is located at page 3-7 */ |
| 82 | #define EE_USER_PAGE_0 3 |
| 83 | #define USER_PAGES 5 |
| 84 | |
| 85 | #endif /* INCeedevh */ |