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Add functionallity to find a mark in the flash buffer for dynamic HTML pages

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logicog
2025-08-05 09:29:46 +02:00
parent 5533676e52
commit 2e6cf7b7d0
2 changed files with 86 additions and 0 deletions
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rtl837x_flash.c
+85
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@@ -8,6 +8,8 @@
#include "rtl837x_sfr.h"
__xdata uint8_t dio_enabled;
__xdata uint8_t markbuf[16];
extern __xdata uint16_t mpos;
#pragma codeseg BANK1
@@ -66,6 +68,7 @@ void flash_init(uint8_t enable_dio) __banked
flash_configure_mmio();
}
uint8_t flash_read_status(void)
{
// Test Controller Busy (we might call this directly after executing a command)
@@ -263,6 +266,88 @@ void flash_read_bulk(register __xdata uint8_t *dst, __xdata uint32_t src, regist
}
void flash_find_mark(__xdata uint32_t src, register uint16_t len, __code uint8_t *mark) __banked
{
uint16_t status;
do {
status = flash_read_status();
} while (status & 0x1);
// Set fast read mode
if (dio_enabled) {
SFR_FLASH_MODEB = 0x18;
SFR_FLASH_CMD_R = 0xbb;
SFR_FLASH_DUMMYCICLES = 4;
} else {
SFR_FLASH_MODEB = 0x0;
SFR_FLASH_CMD_R = 0xb; // Fast read
SFR_FLASH_DUMMYCICLES = 8; // Add 8 dummy clocks after read?
}
uint8_t i = 0;
uint8_t l = 0;
uint8_t k;
// Calculate the length
while (mark[i++])
l++;
if (l >= 12) {
mpos = 0xffff;
return;
}
i = 0;
SFR_FLASH_TCONF = 4;
while (len) {
SFR_FLASH_ADDR16 = src >> 16;
SFR_FLASH_ADDR8 = src >> 8;
SFR_FLASH_ADDR0 = src;
src += 4;
SFR_FLASH_EXEC_GO = 1;
while(SFR_FLASH_EXEC_BUSY);
markbuf[i++] = SFR_FLASH_DATA0;
if (len != 1) {
markbuf[i++] = SFR_FLASH_DATA8;
if (len != 2) {
markbuf[i++] = SFR_FLASH_DATA16;
if (len != 3) {
markbuf[i++] = SFR_FLASH_DATA24;
} else {
markbuf[i++] = 0;
}
} else {
markbuf[i++] = 0;
}
} else {
markbuf[i++] = 0;
}
len -= 4;
uint8_t j = 0;
k = (i + 13 - l) & 0xf;
i &= 0xf;
while (mark[j] && (k != ((i) & 0xf))) {
if (mark[j] != markbuf[k]) {
k = k - j + 17;
j = 0;
} else {
k++;
j++;
}
k &= 0xf;
}
if (!mark[j]) {
mpos = len + l + ((4 - ( k & 0x3)) & 0x3);
return;
}
}
mpos = 0xffff;
return;
}
void flash_read_security(uint32_t addr, uint8_t len) __banked
{
while (flash_read_status() & 0x1);