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86 lines
2.1 KiB
C
86 lines
2.1 KiB
C
/* By Thomas.Lange@Corelatus.com 001025
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$Revision: 1.6 $
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Definitions for EEPROM/VOLT METER DS2438
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Copyright (C) 2000-2001 Corelatus AB */
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#ifndef INCeedevh
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#define INCeedevh
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#define E_DEBUG(fmt,args...) if( Debug ) printk(KERN_DEBUG"EE: " fmt, ##args)
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#define PORT_B_PAR ((volatile immap_t *)CFG_IMMR)->im_cpm.cp_pbpar
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#define PORT_B_ODR ((volatile immap_t *)CFG_IMMR)->im_cpm.cp_pbodr
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#define PORT_B_DIR ((volatile immap_t *)CFG_IMMR)->im_cpm.cp_pbdir
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#define PORT_B_DAT ((volatile immap_t *)CFG_IMMR)->im_cpm.cp_pbdat
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#define SET_PORT_B_INPUT(Mask) PORT_B_DIR &= ~(Mask)
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#define SET_PORT_B_OUTPUT(Mask) PORT_B_DIR |= Mask
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#define WRITE_PORT_B(Mask,Value) { \
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if (Value) PORT_B_DAT |= Mask; \
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else PORT_B_DAT &= ~(Mask); \
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}
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#define WRITE_PORT(Value) WRITE_PORT_B(PB_EEPROM,Value)
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#define READ_PORT (PORT_B_DAT&PB_EEPROM)
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/* 64 bytes chip */
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#define EE_CHIP_SIZE 64
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/* We use this resistor for measuring the current drain on 3.3V */
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#define CURRENT_RESISTOR 0.022
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/* microsecs
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Pull line down at least this long for reset pulse */
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#define RESET_LOW_TIME 490
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/* Read presence pulse after we release reset pulse */
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#define PRESENCE_TIMEOUT 100
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#define PRESENCE_LOW_TIME 200
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#define WRITE_0_LOW 80
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#define WRITE_1_LOW 2
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#define TOTAL_WRITE_LOW 80
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#define READ_LOW 2
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#define READ_TIMEOUT 10
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#define TOTAL_READ_LOW 80
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/*** Rom function commands ***/
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#define READ_ROM 0x33
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#define MATCH_ROM 0x55
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#define SKIP_ROM 0xCC
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#define SEARCH_ROM 0xF0
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/*** Memory_command_function ***/
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#define WRITE_SCRATCHPAD 0x4E
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#define READ_SCRATCHPAD 0xBE
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#define COPY_SCRATCHPAD 0x48
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#define RECALL_MEMORY 0xB8
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#define CONVERT_TEMP 0x44
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#define CONVERT_VOLTAGE 0xB4
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/* Chip is divided in 8 pages, 8 bytes each */
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#define EE_PAGE_SIZE 8
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/* All chip data we want are in page 0 */
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/* Bytes in page 0 */
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#define EE_P0_STATUS 0
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#define EE_P0_TEMP_LSB 1
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#define EE_P0_TEMP_MSB 2
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#define EE_P0_VOLT_LSB 3
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#define EE_P0_VOLT_MSB 4
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#define EE_P0_CURRENT_LSB 5
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#define EE_P0_CURRENT_MSB 6
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/* 40 byte user data is located at page 3-7 */
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#define EE_USER_PAGE_0 3
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#define USER_PAGES 5
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#endif /* INCeedevh */
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