hankshone
- 11th February 2010, 23:29
I am trying to inteface SPI-FRAM with PIC16F877A for a long time. I am sure the hardware connection is correct. Just got some wired results....See anybody can tell me what's the reason and is there any solution...
I really appreciate any suggestions you might have....
FRAM-FM25V10 datasheet:
http://www.ramtron.com/files/pdfs/FM25V10ds_r1-0.pdf
What I am trying to do is write the first 255 locations with 1~255 respectively. the Code and the result is followed:
'************************************************* ***************
'* Name : SPI_FRAM_TEST.BAS *
'* Author : [select VIEW...EDITOR OPTIONS] *
'* Notice : Copyright (c) 2010 [select VIEW...EDITOR OPTIONS] *
'* : All Rights Reserved *
'* Date : 2/10/2010 *
'* Version : 1.0 *
'* Notes : *
'* : *
'************************************************* ***************
CLEAR
DEFINE OSC 4 ; System speed
DEFINE LOADER_USED 1 ;
; Define LCD registers and bits
DEFINE LCD_DREG PORTD ;
DEFINE LCD_BITS 4 ;width of data path
DEFINE LCD_DBIT 4 ;data starts on bit 4
DEFINE LCD_RSREG PORTE ;
DEFINE LCD_RSBIT 0 ;
DEFINE LCD_EREG PORTE ;
DEFINE LCD_EBIT 1 ;
INCLUDE "MODEDEFS.BAS" ;
'--------------------------Serial Port setting up-------------------------------
DEFINE HSER_RXSTA 90H
DEFINE HSER_TXSTA 20H
DEFINE HSER_BAUD 2400
DEFINE HSER_SPBRG 25
'-------------------------------------------------------------------------------
CS VAR PORTA.5 ; Chip select pin
SCK VAR PORTC.3 ; Clock pin
SI VAR PORTC.4 ; Data in pin
SO VAR PORTC.5 ; Data out pin
ADDR VAR WORD ; Address
BLOCK1 VAR BYTE
BLOCK0 VAR BYTE
B0 VAR WORD ; Data
B0=0
BLOCK0=%00000000;
BLOCK1=%00000001
TRISA.5 = 0 ; Set CS to output
ADCON1 = 7 ; Set PORTA and PORTE to digital
LOW PORTE.2 ; LCD R/W line low (W)
PAUSE 100 ; Wait for LCD to start up
FOR ADDR = 1 TO 1000 ; Loop 16 times
B0 =b0+1; ; B0 is data for SEEPROM
GOSUB EEWRITE ; Write to SEEPROM
'PAUSE 10 ; Delay 10ms after each write
NEXT ADDR
LOOP: FOR ADDR = 0 TO 1000 ; Loop 16 times
GOSUB EEREAD ; Read from SEEPROM
hserout [dec4 addr];
hserout [" "];
hserout [bin8 b0,13]
LCDOUT $FE, 1, #ADDR,": ",#B0 ; Display
PAUSE 100 ;
NEXT ADDR ;
GOTO LOOP ;
; Subroutine to read data from addr in serial EEPROM
EEREAD: CS = 0 ; Enable serial EEPROM
SHIFTOUT SO, SCK, , [$03, BLOCK1,ADDR.byte1,addr.byte0] ; Send read cmd and address
SHIFTIN SI, SCK, MSBPRE, [B0] ; Read data
CS = 1 ; Disable
RETURN ;
; Subroutine to write data at addr in serial EEPROM
EEWRITE: CS = 0 ; Enable serial EEPROM
SHIFTOUT SO, SCK, 5, [$06] ; Send write enable command
CS = 1 ; Disable to execute command
CS = 0 ; enable
SHIFTOUT SO, SCK, MSBFIRST, [$02,BLOCK1,addr.byte1, ADDR.byte0,B0] ; Send address and data
CS = 1 ; Disable
RETURN ;
END ; always end all programs with an END statement
ANd the result:
0000 00000011
0001 00000001
0002 00000011
0003 00000011
0004 00000111
0005 00000111
0006 00000111
0007 00000111
0008 00001111
0009 00001111
0010 00001111
0011 00001111
0012 00001111
0013 00001111
0014 00001111
0015 00001111
0016 00011111
0017 00011111
0018 00011111
0019 00011111
0020 00011111
0021 00011111
0022 00011111
0023 00011111
0024 00011111
0025 00011111
0026 00011111
0027 00011111
0028 00011111
0029 00011111
0030 00011111
0031 00011111
0032 00111111
0033 00111111
0034 00111111
0035 00111111
0036 00111111
0037 00111111
0038 00111111
0039 00111111
0040 00111111
0041 00111111
0042 00111111
0043 00111111
0044 00111111
0045 00111111
0046 00111111
0047 00111111
0048 00111111
0049 00111111
0050 00111111
0051 00111111
0052 00111111
0053 00111111
0054 00111111
0055 00111111
0056 00111111
0057 00111111
0058 00111111
0059 00111111
0060 00111111
0061 00111111
0062 00111111
0063 00111111
0064 01111111
0065 01111111
0066 01111111
0067 01111111
0068 01111111
0069 01111111
0070 01111111
0071 01111111
0072 01111111
0073 01111111
0074 01111111
0075 01111111
0076 01111111
0077 01111111
0078 01111111
0079 01111111
0080 01111111
0081 01111111
0082 01111111
0083 01111111
0084 01111111
0085 01111111
0086 01111111
0087 01111111
0088 01111111
0089 01111111
0090 01111111
0091 01111111
0092 01111111
0093 01111111
0094 01111111
0095 01111111
0096 01111111
0097 01111111
0098 01111111
0099 01111111
0100 01111111
0101 01111111
0102 01111111
0103 01111111
0104 01111111
0105 01111111
0106 01111111
0107 01111111
0108 01111111
0109 01111111
0110 01111111
0111 01111111
0112 01111111
0113 01111111
0114 01111111
0115 01111111
0116 01111111
0117 01111111
0118 01111111
0119 01111111
0120 01111111
0121 01111111
0122 01111111
0123 01111111
0124 01111111
0125 01111111
0126 01111111
0127 01111111
0128 10000000
0129 10000001
0130 10000011
0131 10000011
0132 10000111
0133 10000111
0134 10000111
0135 10000111
0136 10001111
0137 10001111
0138 10001111
0139 10001111
0140 10001111
0141 10001111
0142 10001111
0143 10001111
0144 10011111
0145 10011111
0146 10011111
0147 10011111
0148 10011111
0149 10011111
0150 10011111
0151 10011111
0152 10011111
0153 10011111
0154 10011111
0155 10011111
0156 10011111
0157 10011111
0158 10011111
0159 10011111
0160 10111111
0161 10111111
0162 10111111
0163 10111111
0164 10111111
0165 10111111
0166 10111111
0167 10111111
0168 10111111
0169 10111111
0170 10111111
0171 10111111
0172 10111111
0173 10111111
0174 10111111
0175 10111111
0176 10111111
0177 10111111
0178 10111111
0179 10111111
0180 10111111
0181 10111111
0182 10111111
0183 10111111
0184 10111111
0185 10111111
0186 10111111
0187 10111111
0188 10111111
0189 10111111
0190 10111111
0191 10111111
0192 11000000
0193 11000001
0194 11000011
0195 11000011
0196 11000111
0197 11000111
0198 11000111
0199 11000111
0200 11001111
0201 11001111
0202 11001111
0203 11001111
0204 11001111
0205 11001111
0206 11001111
0207 11001111
0208 11011111
0209 11011111
0210 11011111
0211 11011111
0212 11011111
0213 11011111
0214 11011111
0215 11011111
0216 11011111
0217 11011111
0218 11011111
0219 11011111
0220 11011111
0221 11011111
0222 11011111
0223 11011111
0224 11100000
0225 11100001
0226 11100011
0227 11100011
0228 11100111
0229 11100111
0230 11100111
0231 11100111
0232 11101111
0233 11101111
0234 11101111
0235 11101111
0236 11101111
0237 11101111
0238 11101111
0239 11101111
0240 11110000
0241 11110001
0242 11110011
0243 11110011
0244 11110111
0245 11110111
0246 11110111
0247 11110111
0248 11111000
0249 11111001
0250 11111011
0251 11111011
0252 11111100
0253 11111101
0254 11111110
0255 11111111
I really appreciate any suggestions you might have....
FRAM-FM25V10 datasheet:
http://www.ramtron.com/files/pdfs/FM25V10ds_r1-0.pdf
What I am trying to do is write the first 255 locations with 1~255 respectively. the Code and the result is followed:
'************************************************* ***************
'* Name : SPI_FRAM_TEST.BAS *
'* Author : [select VIEW...EDITOR OPTIONS] *
'* Notice : Copyright (c) 2010 [select VIEW...EDITOR OPTIONS] *
'* : All Rights Reserved *
'* Date : 2/10/2010 *
'* Version : 1.0 *
'* Notes : *
'* : *
'************************************************* ***************
CLEAR
DEFINE OSC 4 ; System speed
DEFINE LOADER_USED 1 ;
; Define LCD registers and bits
DEFINE LCD_DREG PORTD ;
DEFINE LCD_BITS 4 ;width of data path
DEFINE LCD_DBIT 4 ;data starts on bit 4
DEFINE LCD_RSREG PORTE ;
DEFINE LCD_RSBIT 0 ;
DEFINE LCD_EREG PORTE ;
DEFINE LCD_EBIT 1 ;
INCLUDE "MODEDEFS.BAS" ;
'--------------------------Serial Port setting up-------------------------------
DEFINE HSER_RXSTA 90H
DEFINE HSER_TXSTA 20H
DEFINE HSER_BAUD 2400
DEFINE HSER_SPBRG 25
'-------------------------------------------------------------------------------
CS VAR PORTA.5 ; Chip select pin
SCK VAR PORTC.3 ; Clock pin
SI VAR PORTC.4 ; Data in pin
SO VAR PORTC.5 ; Data out pin
ADDR VAR WORD ; Address
BLOCK1 VAR BYTE
BLOCK0 VAR BYTE
B0 VAR WORD ; Data
B0=0
BLOCK0=%00000000;
BLOCK1=%00000001
TRISA.5 = 0 ; Set CS to output
ADCON1 = 7 ; Set PORTA and PORTE to digital
LOW PORTE.2 ; LCD R/W line low (W)
PAUSE 100 ; Wait for LCD to start up
FOR ADDR = 1 TO 1000 ; Loop 16 times
B0 =b0+1; ; B0 is data for SEEPROM
GOSUB EEWRITE ; Write to SEEPROM
'PAUSE 10 ; Delay 10ms after each write
NEXT ADDR
LOOP: FOR ADDR = 0 TO 1000 ; Loop 16 times
GOSUB EEREAD ; Read from SEEPROM
hserout [dec4 addr];
hserout [" "];
hserout [bin8 b0,13]
LCDOUT $FE, 1, #ADDR,": ",#B0 ; Display
PAUSE 100 ;
NEXT ADDR ;
GOTO LOOP ;
; Subroutine to read data from addr in serial EEPROM
EEREAD: CS = 0 ; Enable serial EEPROM
SHIFTOUT SO, SCK, , [$03, BLOCK1,ADDR.byte1,addr.byte0] ; Send read cmd and address
SHIFTIN SI, SCK, MSBPRE, [B0] ; Read data
CS = 1 ; Disable
RETURN ;
; Subroutine to write data at addr in serial EEPROM
EEWRITE: CS = 0 ; Enable serial EEPROM
SHIFTOUT SO, SCK, 5, [$06] ; Send write enable command
CS = 1 ; Disable to execute command
CS = 0 ; enable
SHIFTOUT SO, SCK, MSBFIRST, [$02,BLOCK1,addr.byte1, ADDR.byte0,B0] ; Send address and data
CS = 1 ; Disable
RETURN ;
END ; always end all programs with an END statement
ANd the result:
0000 00000011
0001 00000001
0002 00000011
0003 00000011
0004 00000111
0005 00000111
0006 00000111
0007 00000111
0008 00001111
0009 00001111
0010 00001111
0011 00001111
0012 00001111
0013 00001111
0014 00001111
0015 00001111
0016 00011111
0017 00011111
0018 00011111
0019 00011111
0020 00011111
0021 00011111
0022 00011111
0023 00011111
0024 00011111
0025 00011111
0026 00011111
0027 00011111
0028 00011111
0029 00011111
0030 00011111
0031 00011111
0032 00111111
0033 00111111
0034 00111111
0035 00111111
0036 00111111
0037 00111111
0038 00111111
0039 00111111
0040 00111111
0041 00111111
0042 00111111
0043 00111111
0044 00111111
0045 00111111
0046 00111111
0047 00111111
0048 00111111
0049 00111111
0050 00111111
0051 00111111
0052 00111111
0053 00111111
0054 00111111
0055 00111111
0056 00111111
0057 00111111
0058 00111111
0059 00111111
0060 00111111
0061 00111111
0062 00111111
0063 00111111
0064 01111111
0065 01111111
0066 01111111
0067 01111111
0068 01111111
0069 01111111
0070 01111111
0071 01111111
0072 01111111
0073 01111111
0074 01111111
0075 01111111
0076 01111111
0077 01111111
0078 01111111
0079 01111111
0080 01111111
0081 01111111
0082 01111111
0083 01111111
0084 01111111
0085 01111111
0086 01111111
0087 01111111
0088 01111111
0089 01111111
0090 01111111
0091 01111111
0092 01111111
0093 01111111
0094 01111111
0095 01111111
0096 01111111
0097 01111111
0098 01111111
0099 01111111
0100 01111111
0101 01111111
0102 01111111
0103 01111111
0104 01111111
0105 01111111
0106 01111111
0107 01111111
0108 01111111
0109 01111111
0110 01111111
0111 01111111
0112 01111111
0113 01111111
0114 01111111
0115 01111111
0116 01111111
0117 01111111
0118 01111111
0119 01111111
0120 01111111
0121 01111111
0122 01111111
0123 01111111
0124 01111111
0125 01111111
0126 01111111
0127 01111111
0128 10000000
0129 10000001
0130 10000011
0131 10000011
0132 10000111
0133 10000111
0134 10000111
0135 10000111
0136 10001111
0137 10001111
0138 10001111
0139 10001111
0140 10001111
0141 10001111
0142 10001111
0143 10001111
0144 10011111
0145 10011111
0146 10011111
0147 10011111
0148 10011111
0149 10011111
0150 10011111
0151 10011111
0152 10011111
0153 10011111
0154 10011111
0155 10011111
0156 10011111
0157 10011111
0158 10011111
0159 10011111
0160 10111111
0161 10111111
0162 10111111
0163 10111111
0164 10111111
0165 10111111
0166 10111111
0167 10111111
0168 10111111
0169 10111111
0170 10111111
0171 10111111
0172 10111111
0173 10111111
0174 10111111
0175 10111111
0176 10111111
0177 10111111
0178 10111111
0179 10111111
0180 10111111
0181 10111111
0182 10111111
0183 10111111
0184 10111111
0185 10111111
0186 10111111
0187 10111111
0188 10111111
0189 10111111
0190 10111111
0191 10111111
0192 11000000
0193 11000001
0194 11000011
0195 11000011
0196 11000111
0197 11000111
0198 11000111
0199 11000111
0200 11001111
0201 11001111
0202 11001111
0203 11001111
0204 11001111
0205 11001111
0206 11001111
0207 11001111
0208 11011111
0209 11011111
0210 11011111
0211 11011111
0212 11011111
0213 11011111
0214 11011111
0215 11011111
0216 11011111
0217 11011111
0218 11011111
0219 11011111
0220 11011111
0221 11011111
0222 11011111
0223 11011111
0224 11100000
0225 11100001
0226 11100011
0227 11100011
0228 11100111
0229 11100111
0230 11100111
0231 11100111
0232 11101111
0233 11101111
0234 11101111
0235 11101111
0236 11101111
0237 11101111
0238 11101111
0239 11101111
0240 11110000
0241 11110001
0242 11110011
0243 11110011
0244 11110111
0245 11110111
0246 11110111
0247 11110111
0248 11111000
0249 11111001
0250 11111011
0251 11111011
0252 11111100
0253 11111101
0254 11111110
0255 11111111