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split shared memroy access into tx and rx section

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This commit is contained in:
optixx
2009-08-06 10:52:44 +02:00
parent cf95b95723
commit 97962b8e89
3 changed files with 46 additions and 37 deletions
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30
avr/usbload/shared_memory.c
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@@ -38,18 +38,18 @@ uint8_t scratchpad_state;
uint8_t scratchpad_cmd;
uint8_t scratchpad_payload;
void shared_memory_scratchpad_save()
void shared_memory_scratchpad_tx_save()
{
scratchpad_state = sram_read(SHARED_MEM_LOC_STATE);
scratchpad_cmd = sram_read(SHARED_MEM_LOC_CMD);
scratchpad_payload = sram_read(SHARED_MEM_LOC_PAYLOAD);
scratchpad_state = sram_read(SHARED_MEM_TX_LOC_STATE);
scratchpad_cmd = sram_read(SHARED_MEM_TX_LOC_CMD);
scratchpad_payload = sram_read(SHARED_MEM_TX_LOC_PAYLOAD);
}
void shared_memory_scratchpad_restore()
void shared_memory_scratchpad_tx_restore()
{
sram_write(SHARED_MEM_LOC_STATE, scratchpad_state);
sram_write(SHARED_MEM_LOC_CMD, scratchpad_cmd);
sram_write(SHARED_MEM_LOC_PAYLOAD, scratchpad_payload);
sram_write(SHARED_MEM_TX_LOC_STATE, scratchpad_state);
sram_write(SHARED_MEM_TX_LOC_CMD, scratchpad_cmd);
sram_write(SHARED_MEM_TX_LOC_PAYLOAD, scratchpad_payload);
}
void shared_memory_irq_hook()
@@ -66,18 +66,18 @@ void shared_memory_irq_restore()
sram_write(SHARED_IRQ_LOC_HI, irq_addr_hi);
}
void shared_memory_put(uint8_t cmd, uint8_t value)
void shared_memory_write(uint8_t cmd, uint8_t value)
{
info("Write shared memory 0x%04x=0x%02x 0x%04x=0x%02x \n",
SHARED_MEM_LOC_CMD, cmd, SHARED_MEM_LOC_PAYLOAD, value);
SHARED_MEM_TX_LOC_CMD, cmd, SHARED_MEM_TX_LOC_PAYLOAD, value);
shared_memory_scratchpad_save();
shared_memory_scratchpad_tx_save();
shared_memory_irq_hook();
sram_write(SHARED_MEM_LOC_STATE, SHARED_MEM_SNES_ACK);
sram_write(SHARED_MEM_LOC_CMD, cmd);
sram_write(SHARED_MEM_LOC_PAYLOAD, value);
sram_write(SHARED_MEM_TX_LOC_STATE, SHARED_MEM_TX_SNES_ACK);
sram_write(SHARED_MEM_TX_LOC_CMD, cmd);
sram_write(SHARED_MEM_TX_LOC_PAYLOAD, value);
snes_hirom();
snes_wr_disable();
@@ -91,7 +91,7 @@ void shared_memory_put(uint8_t cmd, uint8_t value)
snes_lorom();
snes_wr_disable();
shared_memory_scratchpad_restore();
shared_memory_scratchpad_tx_restore();
shared_memory_irq_restore();
}