68 lines
2.8 KiB
C
68 lines
2.8 KiB
C
/******************** (C) COPYRIGHT 2003 STMicroelectronics ********************
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* File Name : eic.c
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* Author : MCD Application Team
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* Date First Issued : 06/25/2003
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* Description : This file provides all the EIC software functions
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********************************************************************************
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* History:
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* 24/05/2005 : V3.0
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* 30/11/2004 : V2.0
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* 14/07/2004 : V1.3
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* 01/01/2004 : V1.2
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*******************************************************************************
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THE PRESENT SOFTWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS WITH
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CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
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AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT, INDIRECT
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OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE CONTENT
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OF SUCH SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING INFORMATION
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CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
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*******************************************************************************/
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#include "eic.h"
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/*******************************************************************************
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* Function Name : EIC_Init
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* Description : Initialise the EIC using the load PC instruction
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* (PC = PC +offset)
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* Input : None
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* Output : None
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* Return : None
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*******************************************************************************/
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void EIC_Init(void)
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{
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extern u32 T0TIMI_Addr;
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u8 bCounter;
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u32 dOffset=((u32)&T0TIMI_Addr);
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EIC->ICR = 0x00000000; // Disable FIQ and IRQ interrupts
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EIC->IER = 0x00000000; // Disable all channels interrupts
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EIC->IPR = 0xFFFFFFFF; // Clear all pending bits
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EIC->FIR = 0x0000000C; // Disable all FIQ channels interrupts and clear FIQ
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// channels pending bits
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EIC->CIPR = 0x00000000; // Ste the current priority level to zero
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EIC->IVR = 0xE59F0000; // IVR = high half of load PC instruction
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dOffset = (dOffset+0x00007E0)<<16;
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for(bCounter=0; bCounter<32; bCounter++) // Initialize SIRn registers
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{
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EIC->SIR[bCounter] = dOffset|0xF0000000;
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dOffset += 0x00000004 << 16;
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}
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}
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/*******************************************************************************
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* Function Name : EIC_CurrentPriorityLevelConfig
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* Description : Change the current priority level of the srved IRQ routine
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* Input 1 : New priority
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* Output : None
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* Return : None
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*******************************************************************************/
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void EIC_CurrentPriorityLevelConfig(u8 NewPriorityLevel)
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{
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u32 dVal;
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dVal = EIC->ICR; // Save ICR content
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EIC->ICR &= ~0x0001; // Disable IRQ interrupts.
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EIC->CIPR = NewPriorityLevel; // Change the current priority
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EIC->ICR = dVal; // Restore ICR content
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}
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/******************* (C) COPYRIGHT 2003 STMicroelectronics *****END OF FILE****/
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