79 lines
2.5 KiB
C
79 lines
2.5 KiB
C
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/*
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* rom_api_.h
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*
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* Created on:
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* By Arthur:
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*/
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#ifndef __ROM_API_H_
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#define __ROM_API_H_
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// FRO API
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typedef struct _PWRD {
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const unsigned int reserved[2];
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void (*set_fro_frequency)(unsigned frequency);
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} PWRD_API_T;
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// Integer divide API routines
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typedef struct {
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int quot; // Quotient
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int rem; // Remainder
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} IDIV_RETURN_T;
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typedef struct {
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unsigned quot; // Quotient
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unsigned rem; // Reminder
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} UIDIV_RETURN_T;
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typedef struct {
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int (*sidiv)(int numerator, int denominator); // Signed integer division
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unsigned (*uidiv)(unsigned numerator, unsigned denominator); // Unsigned integer division
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IDIV_RETURN_T (*sidivmod)(int numerator, int denominator); // Signed integer division with remainder
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UIDIV_RETURN_T (*uidivmod)(unsigned numerator, unsigned denominator); // Unsigned integer division with remainder
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} ROM_DIV_API_T;
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// The master structure that defines the table of all ROM APIs on the device (a.k.a ROM Driver table)
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typedef struct _ROM_API {
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const unsigned int reserved3[3]; // Offsets 0, 4, 8
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const PWRD_API_T *pPWRD; // Offset 0xC. Power APIs function table base address
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const ROM_DIV_API_T *divApiBase; // Offset 0x10. Integer division routines function table base address
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const unsigned int reserved7[7]; // Offsets 0x14 - 0x2C
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} LPC_ROM_API_T;
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#define ROM_DRIVER_BASE (0x0F001FF8UL)
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// Define a pointer to the master table
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#define LPC_ROM_API (*(LPC_ROM_API_T * *)ROM_DRIVER_BASE)
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// Use like this:
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// ROM_DIV_API_T const *pROMDiv = LPC_ROM_API->divApiBase; // Create and initialize a pointer to the DIVIDE functions table
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// int32_t result; // Declare an int variable
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// result = pROMDiv->sidiv(-99, 6); // Call the sidiv routine, result now contains -99/6 = -16
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// ROM_DIV_API_T const *pPwr = LPC_ROM_API->pPWRD; // Create and initialize a pointer to the power API functions table
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// pPwr->set_power((uint32_t *)&cmd_table, (uint32_t *)&result_table); // Call the set_power routine
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// Alternate form
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#define LPC_PWRD_API ((PWRD_API_T * ) ((*(LPC_ROM_API_T * *) (ROM_DRIVER_BASE))->pPWRD))
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#define LPC_DIVD_API ((ROM_DIV_API_T *) ((*(LPC_ROM_API_T * *) (ROM_DRIVER_BASE))->divApiBase))
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// Use like this:
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// LPC_PWRD_API->set_power((uint32_t *)&cmd_table, (uint32_t *)&result_table); // Call the set_power routine
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#endif // rom_api.h
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