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SPIRAM_NP8P128A13TSM60E
SPI PRAM NP8P128A13 (Micron) 128Mbit see: http://mbed.org/users/okini3939/notebook/extend-memory/
main.cpp@0:4d4598bd9119, 2012-11-09 (annotated)
- Committer:
- okini3939
- Date:
- Fri Nov 09 01:57:47 2012 +0000
- Revision:
- 0:4d4598bd9119
- Child:
- 1:3a2094fa7c4c
1st build
;
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
okini3939 | 0:4d4598bd9119 | 1 | /* |
okini3939 | 0:4d4598bd9119 | 2 | * SPI RAM NP8P128A13TSM60E (Micron) |
okini3939 | 0:4d4598bd9119 | 3 | * 128Mbit |
okini3939 | 0:4d4598bd9119 | 4 | */ |
okini3939 | 0:4d4598bd9119 | 5 | #include "mbed.h" |
okini3939 | 0:4d4598bd9119 | 6 | |
okini3939 | 0:4d4598bd9119 | 7 | #define CMD_WREN 0x06 // Write enable |
okini3939 | 0:4d4598bd9119 | 8 | #define CMD_WRDI 0x04 // Write disable |
okini3939 | 0:4d4598bd9119 | 9 | #define CMD_RDID 0x9f // Read identification |
okini3939 | 0:4d4598bd9119 | 10 | #define CMD_RDSR 0x05 // Read status register |
okini3939 | 0:4d4598bd9119 | 11 | #define CMD_WRSR 0x01 // Write status registe |
okini3939 | 0:4d4598bd9119 | 12 | #define CMD_READ 0x03 // Read data bytes |
okini3939 | 0:4d4598bd9119 | 13 | #define CMD_FREAD 0x0b // Read data bytes at higher speed |
okini3939 | 0:4d4598bd9119 | 14 | #define CMD_PP 0x02 // Page program (legacy program) |
okini3939 | 0:4d4598bd9119 | 15 | #define CMD_PP_BA 0x22 // Page program (bit-alterable write) |
okini3939 | 0:4d4598bd9119 | 16 | #define CMD_PP_1S 0xd1 // Page program (On all 1s) |
okini3939 | 0:4d4598bd9119 | 17 | #define CMD_SE 0xd8 // Sector erase |
okini3939 | 0:4d4598bd9119 | 18 | |
okini3939 | 0:4d4598bd9119 | 19 | DigitalOut myled(LED1); |
okini3939 | 0:4d4598bd9119 | 20 | Serial pc(USBTX, USBRX); |
okini3939 | 0:4d4598bd9119 | 21 | |
okini3939 | 0:4d4598bd9119 | 22 | SPI spi(p11, p12, p13); // mosi, miso, sclk |
okini3939 | 0:4d4598bd9119 | 23 | DigitalOut cs(p14), hold(p15), reset(p16); |
okini3939 | 0:4d4598bd9119 | 24 | |
okini3939 | 0:4d4598bd9119 | 25 | int ram_status () { |
okini3939 | 0:4d4598bd9119 | 26 | int r; |
okini3939 | 0:4d4598bd9119 | 27 | |
okini3939 | 0:4d4598bd9119 | 28 | cs = 0; |
okini3939 | 0:4d4598bd9119 | 29 | spi.write(CMD_RDSR); |
okini3939 | 0:4d4598bd9119 | 30 | r = spi.write(0); |
okini3939 | 0:4d4598bd9119 | 31 | cs = 1; |
okini3939 | 0:4d4598bd9119 | 32 | return r; |
okini3939 | 0:4d4598bd9119 | 33 | } |
okini3939 | 0:4d4598bd9119 | 34 | |
okini3939 | 0:4d4598bd9119 | 35 | int ram_write (int addr, char *buf, int len) { |
okini3939 | 0:4d4598bd9119 | 36 | int i; |
okini3939 | 0:4d4598bd9119 | 37 | |
okini3939 | 0:4d4598bd9119 | 38 | while (ram_status() & 1) { |
okini3939 | 0:4d4598bd9119 | 39 | // write in progress |
okini3939 | 0:4d4598bd9119 | 40 | wait_us(10); |
okini3939 | 0:4d4598bd9119 | 41 | } |
okini3939 | 0:4d4598bd9119 | 42 | |
okini3939 | 0:4d4598bd9119 | 43 | cs = 0; |
okini3939 | 0:4d4598bd9119 | 44 | spi.write(CMD_WREN); |
okini3939 | 0:4d4598bd9119 | 45 | cs = 1; |
okini3939 | 0:4d4598bd9119 | 46 | wait_us(10); |
okini3939 | 0:4d4598bd9119 | 47 | |
okini3939 | 0:4d4598bd9119 | 48 | cs = 0; |
okini3939 | 0:4d4598bd9119 | 49 | spi.write(CMD_PP_BA); |
okini3939 | 0:4d4598bd9119 | 50 | spi.write((addr >> 16) & 0xff); |
okini3939 | 0:4d4598bd9119 | 51 | spi.write((addr >> 8) & 0xff); |
okini3939 | 0:4d4598bd9119 | 52 | spi.write(addr & 0xff); |
okini3939 | 0:4d4598bd9119 | 53 | |
okini3939 | 0:4d4598bd9119 | 54 | len = len - (addr & 0x1f); |
okini3939 | 0:4d4598bd9119 | 55 | for (i = 0; i < len; i ++) { |
okini3939 | 0:4d4598bd9119 | 56 | spi.write(buf[i]); |
okini3939 | 0:4d4598bd9119 | 57 | } |
okini3939 | 0:4d4598bd9119 | 58 | cs = 1; |
okini3939 | 0:4d4598bd9119 | 59 | return i; |
okini3939 | 0:4d4598bd9119 | 60 | } |
okini3939 | 0:4d4598bd9119 | 61 | |
okini3939 | 0:4d4598bd9119 | 62 | int ram_read (int addr, char *buf, int len) { |
okini3939 | 0:4d4598bd9119 | 63 | int i; |
okini3939 | 0:4d4598bd9119 | 64 | |
okini3939 | 0:4d4598bd9119 | 65 | cs = 0; |
okini3939 | 0:4d4598bd9119 | 66 | spi.write(CMD_READ); |
okini3939 | 0:4d4598bd9119 | 67 | spi.write((addr >> 16) & 0xff); |
okini3939 | 0:4d4598bd9119 | 68 | spi.write((addr >> 8) & 0xff); |
okini3939 | 0:4d4598bd9119 | 69 | spi.write(addr & 0xff); |
okini3939 | 0:4d4598bd9119 | 70 | |
okini3939 | 0:4d4598bd9119 | 71 | for (i = 0; i < len; i ++) { |
okini3939 | 0:4d4598bd9119 | 72 | buf[i] = spi.write(0); |
okini3939 | 0:4d4598bd9119 | 73 | } |
okini3939 | 0:4d4598bd9119 | 74 | cs = 1; |
okini3939 | 0:4d4598bd9119 | 75 | return i; |
okini3939 | 0:4d4598bd9119 | 76 | } |
okini3939 | 0:4d4598bd9119 | 77 | |
okini3939 | 0:4d4598bd9119 | 78 | int main() { |
okini3939 | 0:4d4598bd9119 | 79 | int i; |
okini3939 | 0:4d4598bd9119 | 80 | char buf[64]; |
okini3939 | 0:4d4598bd9119 | 81 | |
okini3939 | 0:4d4598bd9119 | 82 | cs = 1; |
okini3939 | 0:4d4598bd9119 | 83 | hold = 1; |
okini3939 | 0:4d4598bd9119 | 84 | reset = 0; |
okini3939 | 0:4d4598bd9119 | 85 | pc.baud(115200); |
okini3939 | 0:4d4598bd9119 | 86 | wait_ms(10); |
okini3939 | 0:4d4598bd9119 | 87 | reset = 1; |
okini3939 | 0:4d4598bd9119 | 88 | wait_ms(500); |
okini3939 | 0:4d4598bd9119 | 89 | |
okini3939 | 0:4d4598bd9119 | 90 | cs = 0; |
okini3939 | 0:4d4598bd9119 | 91 | spi.write(CMD_RDID); |
okini3939 | 0:4d4598bd9119 | 92 | printf("RAM Manufacturer ID : %02x\r\n", spi.write(0)); |
okini3939 | 0:4d4598bd9119 | 93 | i = (spi.write(0) << 8) | spi.write(0); |
okini3939 | 0:4d4598bd9119 | 94 | printf("RAM Device ID : %04x\r\n", i); |
okini3939 | 0:4d4598bd9119 | 95 | cs = 1; |
okini3939 | 0:4d4598bd9119 | 96 | wait_ms(10); |
okini3939 | 0:4d4598bd9119 | 97 | |
okini3939 | 0:4d4598bd9119 | 98 | printf("Status Register : %02x\r\n", ram_status()); |
okini3939 | 0:4d4598bd9119 | 99 | |
okini3939 | 0:4d4598bd9119 | 100 | printf("RAM write\r\n"); |
okini3939 | 0:4d4598bd9119 | 101 | strcpy(buf, "Hello!"); |
okini3939 | 0:4d4598bd9119 | 102 | ram_write(0, buf, 6); |
okini3939 | 0:4d4598bd9119 | 103 | |
okini3939 | 0:4d4598bd9119 | 104 | for (i = 0; i < 64; i ++) { |
okini3939 | 0:4d4598bd9119 | 105 | buf[i] = i; |
okini3939 | 0:4d4598bd9119 | 106 | } |
okini3939 | 0:4d4598bd9119 | 107 | ram_write(6, buf, 64); |
okini3939 | 0:4d4598bd9119 | 108 | |
okini3939 | 0:4d4598bd9119 | 109 | wait_ms(500); |
okini3939 | 0:4d4598bd9119 | 110 | memset(buf, 0, 64); |
okini3939 | 0:4d4598bd9119 | 111 | |
okini3939 | 0:4d4598bd9119 | 112 | printf("RAM read\r\n"); |
okini3939 | 0:4d4598bd9119 | 113 | ram_read(0, buf, 64); |
okini3939 | 0:4d4598bd9119 | 114 | for (i = 0; i < 64; i ++) { |
okini3939 | 0:4d4598bd9119 | 115 | printf(" %02x", buf[i]); |
okini3939 | 0:4d4598bd9119 | 116 | if ((i & 0x0f) == 0x0f) |
okini3939 | 0:4d4598bd9119 | 117 | printf("\r\n"); |
okini3939 | 0:4d4598bd9119 | 118 | } |
okini3939 | 0:4d4598bd9119 | 119 | |
okini3939 | 0:4d4598bd9119 | 120 | while(1) { |
okini3939 | 0:4d4598bd9119 | 121 | myled = 1; |
okini3939 | 0:4d4598bd9119 | 122 | wait(0.2); |
okini3939 | 0:4d4598bd9119 | 123 | myled = 0; |
okini3939 | 0:4d4598bd9119 | 124 | wait(0.2); |
okini3939 | 0:4d4598bd9119 | 125 | } |
okini3939 | 0:4d4598bd9119 | 126 | } |