в Header AT91SAM7S256.h файле написано:
Код
typedef struct _AT91S_PMC {
AT91_REG PMC_SCER; // System Clock Enable Register
AT91_REG PMC_SCDR; // System Clock Disable Register
AT91_REG PMC_SCSR; // System Clock Status Register
AT91_REG Reserved0[1]; //
AT91_REG PMC_PCER; // Peripheral Clock Enable Register
AT91_REG PMC_PCDR; // Peripheral Clock Disable Register
AT91_REG PMC_PCSR; // Peripheral Clock Status Register
AT91_REG Reserved1[1]; //
AT91_REG PMC_MOR; // Main Oscillator Register
AT91_REG PMC_MCFR; // Main Clock Frequency Register
AT91_REG Reserved2[1]; //
AT91_REG PMC_PLLR; // PLL Register
AT91_REG PMC_MCKR; // Master Clock Register
AT91_REG Reserved3[3]; //
AT91_REG PMC_PCKR[3]; // Programmable Clock Register
AT91_REG Reserved4[5]; //
AT91_REG PMC_IER; // Interrupt Enable Register
AT91_REG PMC_IDR; // Interrupt Disable Register
AT91_REG PMC_SR; // Status Register
AT91_REG PMC_IMR; // Interrupt Mask Register
} AT91S_PMC, *AT91PS_PMC;
AT91_REG PMC_SCER; // System Clock Enable Register
AT91_REG PMC_SCDR; // System Clock Disable Register
AT91_REG PMC_SCSR; // System Clock Status Register
AT91_REG Reserved0[1]; //
AT91_REG PMC_PCER; // Peripheral Clock Enable Register
AT91_REG PMC_PCDR; // Peripheral Clock Disable Register
AT91_REG PMC_PCSR; // Peripheral Clock Status Register
AT91_REG Reserved1[1]; //
AT91_REG PMC_MOR; // Main Oscillator Register
AT91_REG PMC_MCFR; // Main Clock Frequency Register
AT91_REG Reserved2[1]; //
AT91_REG PMC_PLLR; // PLL Register
AT91_REG PMC_MCKR; // Master Clock Register
AT91_REG Reserved3[3]; //
AT91_REG PMC_PCKR[3]; // Programmable Clock Register
AT91_REG Reserved4[5]; //
AT91_REG PMC_IER; // Interrupt Enable Register
AT91_REG PMC_IDR; // Interrupt Disable Register
AT91_REG PMC_SR; // Status Register
AT91_REG PMC_IMR; // Interrupt Mask Register
} AT91S_PMC, *AT91PS_PMC;
далее ниже
Код
#define AT91C_BASE_PMC ((AT91PS_PMC) 0xFFFFFC00) // (PMC) Base Address
в программе:
Код
AT91C_BASE_PMC->PMC_SCER = AT91C_PMC_UDP;
правильно ли я понял, что AT91PS_PMC - указатель на структуру_AT91S_PMC.
AT91C_BASE_PMC - ее начальный адресс,
строчка в программе означает, в регистр PMC_SCER (по адресу AT91C_BASE_PMC + 5*AT91_REG) записать значение AT91C_PMC_UDP?
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теперь файл: lib_AT91SAM7S256.h
Код
__inline unsigned int AT91F_AIC_ConfigureIt (
AT91PS_AIC pAic, // \arg pointer to the AIC registers
unsigned int irq_id, // \arg interrupt number to initialize
unsigned int priority, // \arg priority to give to the interrupt
unsigned int src_type, // \arg activation and sense of activation
void (*newHandler) () ) // \arg address of the interrupt handler
{
unsigned int oldHandler;
unsigned int mask;
oldHandler = pAic->AIC_SVR[irq_id];
mask = 0x1 << irq_id;
//* Disable the interrupt on the interrupt controller
pAic->AIC_IDCR = mask;
//* Save the interrupt handler routine pointer and the interrupt priority
pAic->AIC_SVR[irq_id] = (unsigned int) newHandler;
//* Store the Source Mode Register
pAic->AIC_SMR[irq_id] = src_type | priority;
//* Clear the interrupt on the interrupt controller
pAic->AIC_ICCR = mask;
return oldHandler;
}
AT91PS_AIC pAic, // \arg pointer to the AIC registers
unsigned int irq_id, // \arg interrupt number to initialize
unsigned int priority, // \arg priority to give to the interrupt
unsigned int src_type, // \arg activation and sense of activation
void (*newHandler) () ) // \arg address of the interrupt handler
{
unsigned int oldHandler;
unsigned int mask;
oldHandler = pAic->AIC_SVR[irq_id];
mask = 0x1 << irq_id;
//* Disable the interrupt on the interrupt controller
pAic->AIC_IDCR = mask;
//* Save the interrupt handler routine pointer and the interrupt priority
pAic->AIC_SVR[irq_id] = (unsigned int) newHandler;
//* Store the Source Mode Register
pAic->AIC_SMR[irq_id] = src_type | priority;
//* Clear the interrupt on the interrupt controller
pAic->AIC_ICCR = mask;
return oldHandler;
}
как компилятор узнает адрес регистра AIC_IDCR?
Код
pAic->AIC_IDCR = mask;
ведь pAic это есть AT91PS_AIC, но на какой начальный адрес он указывает НЕТ в библиотеке
Код
typedef struct _AT91S_AIC {
AT91_REG AIC_SMR[32]; // Source Mode Register
AT91_REG AIC_SVR[32]; // Source Vector Register
AT91_REG AIC_IVR; // IRQ Vector Register
AT91_REG AIC_FVR; // FIQ Vector Register
AT91_REG AIC_ISR; // Interrupt Status Register
AT91_REG AIC_IPR; // Interrupt Pending Register
AT91_REG AIC_IMR; // Interrupt Mask Register
AT91_REG AIC_CISR; // Core Interrupt Status Register
AT91_REG Reserved0[2]; //
AT91_REG AIC_IECR; // Interrupt Enable Command Register
AT91_REG AIC_IDCR; // Interrupt Disable Command Register
AT91_REG AIC_ICCR; // Interrupt Clear Command Register
AT91_REG AIC_ISCR; // Interrupt Set Command Register
AT91_REG AIC_EOICR; // End of Interrupt Command Register
AT91_REG AIC_SPU; // Spurious Vector Register
AT91_REG AIC_DCR; // Debug Control Register (Protect)
AT91_REG Reserved1[1]; //
AT91_REG AIC_FFER; // Fast Forcing Enable Register
AT91_REG AIC_FFDR; // Fast Forcing Disable Register
AT91_REG AIC_FFSR; // Fast Forcing Status Register
} AT91S_AIC, *AT91PS_AIC;
AT91_REG AIC_SMR[32]; // Source Mode Register
AT91_REG AIC_SVR[32]; // Source Vector Register
AT91_REG AIC_IVR; // IRQ Vector Register
AT91_REG AIC_FVR; // FIQ Vector Register
AT91_REG AIC_ISR; // Interrupt Status Register
AT91_REG AIC_IPR; // Interrupt Pending Register
AT91_REG AIC_IMR; // Interrupt Mask Register
AT91_REG AIC_CISR; // Core Interrupt Status Register
AT91_REG Reserved0[2]; //
AT91_REG AIC_IECR; // Interrupt Enable Command Register
AT91_REG AIC_IDCR; // Interrupt Disable Command Register
AT91_REG AIC_ICCR; // Interrupt Clear Command Register
AT91_REG AIC_ISCR; // Interrupt Set Command Register
AT91_REG AIC_EOICR; // End of Interrupt Command Register
AT91_REG AIC_SPU; // Spurious Vector Register
AT91_REG AIC_DCR; // Debug Control Register (Protect)
AT91_REG Reserved1[1]; //
AT91_REG AIC_FFER; // Fast Forcing Enable Register
AT91_REG AIC_FFDR; // Fast Forcing Disable Register
AT91_REG AIC_FFSR; // Fast Forcing Status Register
} AT91S_AIC, *AT91PS_AIC;
спасибо
Запустите мне USB или EMAC за 5 минут, пожалуйста.
Ничего гениального в ней не вижу, хоть убейте.
(как слоников перед сном 
, где используются регистры. Так что как для меня - функции прозрачнее. 