94 lines
3.3 KiB
C
94 lines
3.3 KiB
C
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/*
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*********************************************************************************************************
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*
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* LCD Driver via EBI
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*
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* IAR Development Kits
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* on the
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*
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* M451
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*
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* Filename : ebi_sram.c
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* Version : V1.00
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* Programmer(s) : Qian Xianghong
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*********************************************************************************************************
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*/
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/*
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*********************************************************************************************************
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* INCLUDE FILES
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*********************************************************************************************************
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*/
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#include "includes.h"
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// <20><>ʼ<EFBFBD><CABC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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void SRAM_Init()
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{
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/* EBI AD0~1 pins on PB.12~13 */
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SYS->PB_H_MFP &= ~(SYS_PB_H_MFP_PB12_MFP_Msk | SYS_PB_H_MFP_PB13_MFP_Msk);
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SYS->PB_H_MFP |= (SYS_PB_H_MFP_PB12_MFP_EBI_AD0 | SYS_PB_H_MFP_PB13_MFP_EBI_AD1);
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/* EBI AD2~3 pins on PC.14~15 */
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SYS->PC_H_MFP &= ~(SYS_PC_H_MFP_PC14_MFP_Msk | SYS_PC_H_MFP_PC15_MFP_Msk);
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SYS->PC_H_MFP |= (SYS_PC_H_MFP_PC14_MFP_EBI_AD2 | SYS_PC_H_MFP_PC15_MFP_EBI_AD3);
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/* EBI AD4~5 pins on PC.6~7 */
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SYS->PC_L_MFP &= ~(SYS_PC_L_MFP_PC6_MFP_Msk | SYS_PC_L_MFP_PC7_MFP_Msk);
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SYS->PC_L_MFP |= (SYS_PC_L_MFP_PC6_MFP_EBI_AD4 | SYS_PC_L_MFP_PC7_MFP_EBI_AD5);
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/* EBI AD6~12 pins on PA.7~1 */
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SYS->PA_L_MFP &= ~(SYS_PA_L_MFP_PA7_MFP_Msk | SYS_PA_L_MFP_PA6_MFP_Msk);
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SYS->PA_L_MFP |= (SYS_PA_L_MFP_PA7_MFP_EBI_AD6 | SYS_PA_L_MFP_PA6_MFP_EBI_AD7);
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SYS->PA_L_MFP &= ~(SYS_PA_L_MFP_PA5_MFP_Msk | SYS_PA_L_MFP_PA4_MFP_Msk);
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SYS->PA_L_MFP |= (SYS_PA_L_MFP_PA5_MFP_EBI_AD8 | SYS_PA_L_MFP_PA4_MFP_EBI_AD9);
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SYS->PA_L_MFP &= ~(SYS_PA_L_MFP_PA3_MFP_Msk | SYS_PA_L_MFP_PA2_MFP_Msk | SYS_PA_L_MFP_PA1_MFP_Msk);
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SYS->PA_L_MFP |= (SYS_PA_L_MFP_PA3_MFP_EBI_AD10 | SYS_PA_L_MFP_PA2_MFP_EBI_AD11 | SYS_PA_L_MFP_PA1_MFP_EBI_AD12);
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/* EBI AD13~15 pins on PA.12~14 */
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SYS->PA_H_MFP &= ~(SYS_PA_H_MFP_PA12_MFP_Msk | SYS_PA_H_MFP_PA13_MFP_Msk | SYS_PA_H_MFP_PA14_MFP_Msk);
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SYS->PA_H_MFP |= (SYS_PA_H_MFP_PA12_MFP_EBI_AD13 | SYS_PA_H_MFP_PA13_MFP_EBI_AD14 | SYS_PA_H_MFP_PA14_MFP_EBI_AD15);
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/* EBI nWR on PA.10, EBI nRD pin on PA.11 */
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SYS->PA_H_MFP &= ~(SYS_PA_H_MFP_PA10_MFP_Msk | SYS_PA_H_MFP_PA11_MFP_Msk);
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SYS->PA_H_MFP |= (SYS_PA_H_MFP_PA10_MFP_EBI_NWE | SYS_PA_H_MFP_PA11_MFP_EBI_NRE);
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/* EBI ALE pin on PB.6, EBI NCS pin on PB.7 */
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SYS->PB_L_MFP &= ~(SYS_PB_L_MFP_PB6_MFP_Msk | SYS_PB_L_MFP_PB7_MFP_Msk);
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SYS->PB_L_MFP |= (SYS_PB_L_MFP_PB6_MFP_EBI_ALE | SYS_PB_L_MFP_PB7_MFP_EBI_NCS);
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// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><CAB1>
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CLK_EnableModuleClock(EBI_MODULE);
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}
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// <20><><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD><E8B1B8><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD>
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void SRAM_Open()
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{
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// <20><><EFBFBD><EFBFBD>EBI
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EBI_Open(0, EBI_BUSWIDTH_8BIT, EBI_TIMING_VERYFAST, 0, 0);
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}
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// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>չ<EFBFBD>ڴ<EFBFBD>
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// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֻ<EFBFBD><D6BB><EFBFBD>ڳ<EFBFBD>ʼ<EFBFBD><CABC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ã<EFBFBD><C3A3><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ÿ<EFBFBD><C3BF>ܻᵼ<DCBB>³<EFBFBD>ͻ<EFBFBD><CDBB>
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void *SRAM_Alloc(uint32_t size)
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{
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static uint32_t SRAM_Base = 0;
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void *p = 0;
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// 4<>ֽڶ<D6BD><DAB6><EFBFBD>
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if(size % 4)
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size += (4 - size % 4);
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// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С
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if(SRAM_Base + size <= SRAM_SIZE)
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{
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// printf("\nAlloced SRAM at 0x%08X size %04X (%d) bytes\n", EBI_BASE_ADDR + SRAM_Base, size, size);
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p = (void *) (EBI_BASE_ADDR + SRAM_Base);
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SRAM_Base += size;
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}
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else
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printf("\n****** Alloc SRAM failed.\n");
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return p;
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}
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