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Fixed physical address calculation.

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The address mask to use is of course dependent on the actual socket memory size.
This commit is contained in:
Oliver Schmidt 2020-04-25 23:11:30 +02:00
parent f9e28e79b9
commit edccf1d1dc
1 changed files with 4 additions and 1 deletions
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5
apps/w5100.c
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@ -44,6 +44,7 @@ static volatile uint8_t* w5100_addr_lo;
static uint16_t addr_basis[2];
static uint16_t addr_limit[2];
static uint16_t addr_mask [2];
static void set_addr(uint16_t addr)
{
@ -148,6 +149,7 @@ void w5100_config(uint8_t eth_init)
addr_basis[do_send] = addr [do_send] + size[sizes & 3];
addr_limit[do_send] = addr_basis[do_send] + size[sizes >> 2 & 3];
addr_mask [do_send] = size[sizes >> 2 & 3] - 1;
}
}
}
@ -255,7 +257,8 @@ uint16_t w5100_data_request(bool do_send)
0x0524}; // Socket 1 TX Write Pointer Register
// Calculate and set physical address
uint16_t addr = get_word(reg[do_send]) & 0x0FFF | addr_basis[do_send];
uint16_t addr = get_word(reg[do_send]) & addr_mask [do_send]
| addr_basis[do_send];
set_addr(addr);
// Access to *w5100_data is limited both by ...