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Check for sifficient flashsize before applying an update

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This commit is contained in:
feelfree69
2026-02-25 18:51:00 +01:00
parent e26a9e3db9
commit ffbd2c512d
4 changed files with 53 additions and 108 deletions
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rtl837x_flash.c
+16 -57
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@@ -9,7 +9,7 @@
__xdata uint8_t dio_enabled;
__xdata struct flash_region_t flash_region;
__xdata uint32_t flash_size;
// For the flash commands, see e.g. Windbond W25Q32JV datasheet
#define CMD_WRITE_STATUS 0x01
@@ -17,8 +17,9 @@ __xdata struct flash_region_t flash_region;
// Don't use command `READ 0x03`, because on many device this command can't run at maximum SPI-clock speed.
// Use `Fast READ 0x0b` instead!
//#define CMD_READ 0x03
#define CMD_READ_STATUS 0x05
#define CMD_WRITE_ENABLE 0x06
#define CMD_FREAD 0x0b
#define CMD_FREAD 0x0b
#define CMD_SECTOR_ERASE 0x20
#define CMD_READ_SECURITY_REGS 0x48
#define CMD_READ_UNIQUE_ID 0x4b
@@ -87,7 +88,7 @@ uint8_t flash_read_status(void)
// setup status read command
SFR_FLASH_TCONF = 0x11;
SFR_FLASH_CMD_R = 5;
SFR_FLASH_CMD_R = CMD_READ_STATUS;
// execute and wait for controller done
SFR_FLASH_EXEC_GO = 1;
@@ -119,9 +120,10 @@ void flash_read_uid(void)
print_byte(SFR_FLASH_DATA8);
print_byte(SFR_FLASH_DATA16);
print_byte(SFR_FLASH_DATA24);
write_char(' ');
SFR_FLASH_DUMMYCYCLES = 24; // Doesn't seem to work; we get the same data as for the first transfer
SFR_FLASH_EXEC_GO = 1;
SFR_FLASH_DUMMYCYCLES = 24;
while(SFR_FLASH_EXEC_BUSY);
print_byte(SFR_FLASH_DATA0);
@@ -148,15 +150,17 @@ void flash_read_jedecid(void)
SFR_FLASH_EXEC_GO = 1;
while(SFR_FLASH_EXEC_BUSY);
print_string("Maufacturer ID: 0x");
print_byte(SFR_FLASH_DATA0);
print_string("\nMemory Type: 0x");
print_byte(SFR_FLASH_DATA8);
print_byte(SFR_FLASH_DATA16);
print_byte(SFR_FLASH_DATA24);
// Reset slow read mode
SFR_FLASH_MODEB = 0x0;
SFR_FLASH_CMD_R = CMD_FREAD;
SFR_FLASH_DUMMYCYCLES = 8;
print_string("\nCapacity: 0x");
uint8_t cap = SFR_FLASH_DATA16;
flash_size = 1UL << cap;
print_byte(cap);
print_string(" = ");
print_long(flash_size);
print_string(" Bytes\n");
flash_configure_mmio();
}
@@ -188,51 +192,6 @@ void flash_write_enable(void)
} while (!(status & 0x2));
}
void flash_dump(uint8_t len)
{
short status;
do {
status = flash_read_status();
print_short(status);
} while (status & 0x1);
// Set fast read mode
if (dio_enabled) {
SFR_FLASH_MODEB = 0x18;
SFR_FLASH_CMD_R = CMD_FREAD_DIO;
SFR_FLASH_DUMMYCYCLES = 4;
} else {
SFR_FLASH_MODEB = 0x0;
SFR_FLASH_CMD_R = CMD_FREAD; // Fast read
SFR_FLASH_DUMMYCYCLES = 8; // Add 8 dummy clocks after read?
}
// Read 4 bytes
SFR_FLASH_TCONF = 4;
while (len) {
SFR_FLASH_ADDR16 = flash_region.addr >> 16;
SFR_FLASH_ADDR8 = flash_region.addr >> 8;
SFR_FLASH_ADDR0 = flash_region.addr;
flash_region.addr += 4;
SFR_FLASH_EXEC_GO = 1;
while(SFR_FLASH_EXEC_BUSY);
print_short(SFR_FLASH_DATA0);
if (len == 1)
return;
print_short(SFR_FLASH_DATA8);
if (len == 2)
return;
print_short(SFR_FLASH_DATA16);
if (len == 3)
return;
print_short(SFR_FLASH_DATA24);
len -= 4;
}
}
/*
* Reads bulk data of length len from the flash memory starging at address src
* and writes the data into a buffer pointed to by dst in XMEM
@@ -315,7 +274,7 @@ void flash_read_security(void)
if (flash_region.len == 3)
break;
print_byte(SFR_FLASH_DATA24);
write_char(' ');
flash_region.len -= 4;
} while(flash_region.len);