RaspberrPi project source code
Guo Wenxue
2024-07-07 75843d7e163f97fd42f96661863c1de664b08cc8
modules/w25qflash.c
@@ -1,16 +1,25 @@
/*********************************************************************************
 *      Copyright:  (C) 2023 LingYun IoT System Studio. All Rights Reserved.
 *      Copyright:  (C) 2023 LingYun IoT System Studio
 *                  All rights reserved.
 *
 *       Filename:  at24c.c
 *    Description:  This file is AT24Cxx EEPROM code
 *
 *        Version:  1.0.0(10/08/23)
 *         Author:  Guo Wenxue <guowenxue@gmail.com>
 *      ChangeLog:  1, Release initial version on "10/08/23 17:52:00"
 *
 *    Description:  This file is W25Qxx SPI Norflash driver on RaspberryPi 40Pin.
 * Pin connection:
 *                 W25QXX       Raspberry Pi 40Pin
 *                   VCC   <--->   Pin#1 (3.3V)
 *                   CS    <--->   Pin#24(CS)
 *                   DO    <--->   Pin#21(MISO)
 *                   GND   <--->   Pin#9 (GND)
 *                   CLK   <--->   Pin#23(SCLK)
 *                   DI    <--->   Pin#19(MOSI)
 *
 *                       W25QXX       RaspberryPi 40Pin
 *                        VCC   <--->   3.3V(Pin#1)
 *                        CS    <--->     CS(Pin#24)
 *                        DO    <--->   MISO(Pin#21)
 *                        GND   <--->    GND(Pin#9)
 *                        CLK   <--->   SCLK(Pin#23)
 *                        DI    <--->   MOSI(Pin#19)
 * /boot/config.txt:
 *                  dtparam=spi=on
 *
 ********************************************************************************/
@@ -46,7 +55,7 @@
 *|   Entry Functions     |
 *+-----------------------+*/
void dump_buf(const char *prompt, char *buf, size_t len);
void dump_buf(const char *prompt, char *buffer, size_t length);
int main (int argc, char **argv)
{
@@ -745,9 +754,9 @@
    } while ((buf[1] & 0x01) == 0x01);
}
/*+----------------+
 *|    dump_buf    |
 *+----------------+*/
/*+----------------------+
 *|    Misc functions    |
 *+----------------------+*/
void print_buf(const char *prompt, uint8_t *buf, int size)
{
@@ -772,74 +781,47 @@
    return ;
}
#define LINELEN 81
#define CHARS_PER_LINE 16
static char *print_char =
"                "
"                "
" !\"#$%&'()*+,-./"
"0123456789:;<=>?"
"@ABCDEFGHIJKLMNO"
"PQRSTUVWXYZ[\\]^_"
"`abcdefghijklmno"
"pqrstuvwxyz{|}~ "
"                "
"                "
" ???????????????"
"????????????????"
"????????????????"
"????????????????"
"????????????????"
"????????????????";
void dump_buf(const char *prompt, char *buf, size_t len)
void dump_buf(const char *prompt, char *buffer, size_t length)
{
    int rc;
    int idx;
    char prn[LINELEN];
    char lit[CHARS_PER_LINE + 2];
    char hc[4];
    short line_done = 1;
    size_t i, j;
    if( prompt )
        printf("%s", prompt);
    rc = len;
    idx = 0;
    lit[CHARS_PER_LINE] = '\0';
    while (rc > 0)
    if (prompt)
    {
        if (line_done)
            snprintf(prn, LINELEN, "%08X: ", idx);
        do
        {
            unsigned char c = buf[idx];
            snprintf(hc, 4, "%02X ", c);
            strncat(prn, hc, LINELEN);
            lit[idx % CHARS_PER_LINE] = print_char[c];
        }
        while (--rc > 0 && (++idx % CHARS_PER_LINE != 0));
        line_done = (idx % CHARS_PER_LINE) == 0;
        if (line_done)
        {
            printf("%s  %s\r\n", prn, lit);
        }
        printf("%s\n", prompt);
    }
    if (!line_done)
    for (i = 0; i < length; i += 16)
    {
        int ldx = idx % CHARS_PER_LINE;
        lit[ldx++] = print_char[(int)buf[idx]];
        lit[ldx] = '\0';
        printf("%08zx: ", i);
        while ((++idx % CHARS_PER_LINE) != 0)
            strncat(prn, "   ", sizeof(prn)-strlen(prn));
        for (j = 0; j < 16; j++)
        {
            if (i + j < length)
            {
                printf("%02x ", buffer[i + j]);
            }
            else
            {
                printf("   ");
            }
        }
        printf("%s  %s\r\n", prn, lit);
        printf(" ");
        for (j = 0; j < 16; j++)
        {
            if (i + j < length)
            {
                unsigned char c = buffer[i + j];
                printf("%c", (c >= 32 && c <= 126) ? c : '.');
            }
            else
            {
                printf(" ");
            }
        }
        printf("\n");
    }
}