/********************************************************************* FileName: Flash.c Dependencies: See #includes Processor: PIC32MZ Hardware: MainBrain MZ Complier: XC32 4.40 Author: Larry Knight 2023 /********************************************************************* Software License Agreement: Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. Description: System Clock = 200 - 250 MHz File Description: Change History: /***********************************************************************/ #include #include #include "MainBrain.h" //Flash Sector Size const uint16_t SECTOR_SIZE = 4095; uint8_t data_flash; unsigned long address_flash; uint8_t Flash_MID; uint8_t Flash_DID; int flash_size; unsigned long Bytes_used; uint32_t dly = 10000; void Flash_Init(void) { //RB2 = A16 TRISBbits.TRISB2 = 0; PORTBbits.RB2 = 0; //RB4 = A17 TRISBbits.TRISB4 = 0; PORTBbits.RB4 = 0; //RB3 = A18 TRISBbits.TRISB3 = 0; PORTBbits.RB3 = 0; //RA10 = /CS2 TRISAbits.TRISA10 = 0; PORTAbits.RA10 = 1; //****************************************************** // Get Manufacturer ID //****************************************************** //CS2 PORTAbits.RA10 = 0; //Enter sequence PMWADDR = 0x5555; PMDOUT = 0xaa; while(PMMODEbits.BUSY == 1); PMWADDR = 0x2aaa; PMDOUT = 0x55; while(PMMODEbits.BUSY == 1); Delay32(0, dly); PMWADDR = 0x5555; PMDOUT = 0x90; while(PMMODEbits.BUSY == 1); //read device ID PMRADDR = 0x0; //dummy read for PMP Flash_MID = PMRDIN; while(PMMODEbits.BUSY == 1); Flash_MID = PMRDIN; while(PMMODEbits.BUSY == 1); //Exit sequence PMWADDR = 0; PMDOUT = 0xf0; while(PMMODEbits.BUSY == 1); PORTAbits.RA10 = 1; //If the manufacturer ID is not 0xC2 then set error bit 0 if(Flash_MID != 0xc2) { lastError = lastError | 1; } //****************************************************** // Get Device ID //****************************************************** //CS2 PORTAbits.RA10 = 0; //Get Chip ID //Enter sequence PMWADDR = 0x5555; PMDOUT = 0xaa; while(PMMODEbits.BUSY == 1); PMWADDR = 0x2aaa; PMDOUT = 0x55; while(PMMODEbits.BUSY == 1); PMWADDR = 0x5555; PMDOUT = 0x90; while(PMMODEbits.BUSY == 1); Delay32(0, dly); //read device ID PMRADDR = 0x1; //dummy read for PMP Flash_DID = PMRDIN; while(PMMODEbits.BUSY == 1); Flash_DID = PMRDIN; while(PMMODEbits.BUSY == 1); //Exit sequence PMWADDR = 1; PMDOUT = 0xf0; while(PMMODEbits.BUSY == 1); Delay32(0, dly); //CS2 PORTAbits.RA10 = 1; //If device code is not 0x4F the set error bit 1 if(Flash_DID != 0x4f) { lastError = lastError | 2; } } void Flash_High_Address(unsigned address_flash) { //Handle the upper address pins (A16-18) //0000-ffff if(address_flash > 0xffff) { //RB2 = A16 PORTBbits.RB2 = 1; //RB4 = A17 PORTBbits.RB4 = 0; //RB3 = A18 PORTBbits.RB3 = 0; } //10000-1ffff if(address_flash > 0x1ffff) { //RB2 = A16 PORTBbits.RB2 = 0; //RB4 = A17 PORTBbits.RB4 = 1; //RB3 = A18 PORTBbits.RB3 = 0; } //20000-2ffff if(address_flash > 0x2ffff) { //RB2 = A16 PORTBbits.RB2 = 1; //RB4 = A17 PORTBbits.RB4 = 1; //RB3 = A18 PORTBbits.RB3 = 0; } //30000-3ffff if(address_flash > 0x3ffff) { //RB2 = A16 PORTBbits.RB2 = 0; //RB4 = A17 PORTBbits.RB4 = 0; //RB3 = A18 PORTBbits.RB3 = 1; } //40000-4ffff if(address_flash > 0x4ffff) { //RB2 = A16 PORTBbits.RB2 = 1; //RB4 = A17 PORTBbits.RB4 = 0; //RB3 = A18 PORTBbits.RB3 = 1; } //50000-5ffff if(address_flash > 0x5ffff) { //RB2 = A16 PORTBbits.RB2 = 0; //RB4 = A17 PORTBbits.RB4 = 1; //RB3 = A18 PORTBbits.RB3 = 1; } //60000-6ffff if(address_flash > 0x6ffff) { //RB2 = A16 PORTBbits.RB2 = 1; //RB4 = A17 PORTBbits.RB4 = 1; //RB3 = A18 PORTBbits.RB3 = 1; } } void Flash_RD(unsigned address_flash) { //Handle the upper address pins (A16-18) Flash_High_Address(address_flash); //Clear off upper bits and load in to PMP PMRADDR = address_flash & 0x0ffff; ///CS2 PORTAbits.RA10 = 0; //dummy read data_flash = PMRDIN; while(PMMODEbits.BUSY == 1); data_flash = PMRDIN; while(PMMODEbits.BUSY == 1); ///CS2 PORTAbits.RA10 = 1; //RB2 = A16 PORTBbits.RB2 = 0; //RB4 = A17 PORTBbits.RB4 = 0; //RB3 = A18 PORTBbits.RB3 = 0; } void Flash_WR(unsigned address_flash, uint8_t data_flash) { LED_Port(2); //Handle the upper address pins (A16-18) Flash_High_Address(address_flash); ///CS2 PORTAbits.RA10 = 0; //Enter sequence PMWADDR = 0x5555; PMDOUT = 0xaa; while(PMMODEbits.BUSY == 1); PMWADDR = 0x2aaa; PMDOUT = 0x55; while(PMMODEbits.BUSY == 1); PMWADDR = 0x5555; PMDOUT = 0xa0; while(PMMODEbits.BUSY == 1); //write data //Clear off upper bits and load in to PMP PMWADDR = address_flash & 0x0ffff; PMRADDR = PMWADDR; PMDOUT = data_flash; while(PMMODEbits.BUSY == 1); uint8_t j = 0; uint8_t i = PMRDIN; //Wait for end of program //using D7 - Data# polling while(data_flash != i) { i = PMRDIN; while(PMMODEbits.BUSY == 1); j++; LED_Port(j); } j = 0; //now we must verify at least 2 times //to prevent false rejection while(i != data_flash) { i = PMRDIN; while(PMMODEbits.BUSY == 1); j++; LED_Port(j); } LED_Port(0); ///CS2 PORTAbits.RA10 = 1; //RB2 = A16 PORTBbits.RB2 = 0; //RB4 = A17 PORTBbits.RB4 = 0; //RB3 = A18 PORTBbits.RB3 = 0; } void Flash_Sector_Erase(int erase_sector) { data_flash = 0; erase_sector = erase_sector << 12; ///CS2 PORTAbits.RA10 = 0; //Enter sequence PMWADDR = 0x5555; PMDOUT = 0xaa; while(PMMODEbits.BUSY == 1); PMWADDR = 0x2aaa; PMDOUT = 0x55; while(PMMODEbits.BUSY == 1); PMWADDR = 0x5555; PMDOUT = 0x80; while(PMMODEbits.BUSY == 1); PMWADDR = 0x5555; PMDOUT = 0xaa; while(PMMODEbits.BUSY == 1); PMWADDR = 0x2aaa; PMDOUT = 0x55; while(PMMODEbits.BUSY == 1); //Sector address PMWADDR = erase_sector; PMDOUT = 0x30; while(PMMODEbits.BUSY == 1); int j = 0; while(data_flash != 0xff) { data_flash = PMRDIN; while(PMMODEbits.BUSY == 1); j++; LED_Port(j); } //CS2 PORTAbits.RA10 = 1; } void Flash_Chip_Erase(void) { int i; data_flash = 0; //CS2 PORTAbits.RA10 = 0; //Enter sequence PMWADDR = 0x5555; PMDOUT = 0xaa; while(PMMODEbits.BUSY == 1); PMWADDR = 0x2aaa; PMDOUT = 0x55; while(PMMODEbits.BUSY == 1); PMWADDR = 0x5555; PMDOUT = 0x80; while(PMMODEbits.BUSY == 1); PMWADDR = 0x5555; PMDOUT = 0xaa; while(PMMODEbits.BUSY == 1); PMWADDR = 0x2aaa; PMDOUT = 0x55; while(PMMODEbits.BUSY == 1); PMWADDR = 0x5555; PMDOUT = 0x10; while(PMMODEbits.BUSY == 1); while(data_flash != 0xff) { data_flash = PMRDIN; while(PMMODEbits.BUSY == 1); } //CS2 PORTAbits.RA10 = 1; } void Flash_Get_Bytes_Used(void) { unsigned long i; Bytes_used = 0; if(Flash_DID == 0xd5) { for(i=0; i <= 0x1ffff; i++) { Flash_RD(i); if(data_flash != 0xff) { Bytes_used++; } } } if(Flash_DID == 0xd6) { for(i=0; i <= 0x2ffff; i++) { Flash_RD(i); if(data_flash != 0xff) { Bytes_used++; } } } if(Flash_DID == 0xd7) { for(i=0; i <= 0x7ffff; i++) { Flash_RD(i); if(data_flash != 0xff) { Bytes_used++; } } } PORTBbits.RB8 = 0; PORTAbits.RA5 = 0; PORTAbits.RA3 = 0; return; }