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add scratchpad region save and restore

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This commit is contained in:
optixx
2009-08-24 20:53:14 +02:00
parent 98ac61c91d
commit ee9b377698
4 changed files with 63 additions and 7 deletions
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52
avr/usbload/shared_memory.c
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@@ -38,6 +38,52 @@ uint8_t scratchpad_state;
uint8_t scratchpad_cmd;
uint8_t scratchpad_payload;
uint8_t scratchpad_region_rx[SHARED_MEM_RX_LOC_SIZE];
uint8_t scratchpad_region_tx[SHARED_MEM_TX_LOC_SIZE];
uint8_t scratchpad_locked_rx = 1;
uint8_t scratchpad_locked_tx = 1;
void shared_memory_scratchpad_region_saye_helper(uint32_t addr){
if(addr > (SHARED_MEM_TX_LOC_STATE + SHARED_MEM_TX_LOC_SIZE ))
shared_memory_scratchpad_region_tx_save();
if(addr > (SHARED_MEM_RX_LOC_STATE + SHARED_MEM_RX_LOC_SIZE ))
shared_memory_scratchpad_region_rx_save();
}
void shared_memory_scratchpad_region_tx_save()
{
debug(DEBUG_SHM,"shared_memory_scratchpad_region_tx_save: unlock\n");
sram_bulk_read_buffer(SHARED_MEM_TX_LOC_STATE,scratchpad_region_tx,SHARED_MEM_TX_LOC_SIZE);
scratchpad_locked_tx = 0;
}
void shared_memory_scratchpad_region_tx_restore()
{
debug(DEBUG_SHM,"shared_memory_scratchpad_region_tx_restore: lock\n");
sram_bulk_copy(SHARED_MEM_TX_LOC_STATE,scratchpad_region_tx,SHARED_MEM_TX_LOC_SIZE);
scratchpad_locked_tx = 1;
}
void shared_memory_scratchpad_region_rx_save()
{
debug(DEBUG_SHM,"shared_memory_scratchpad_region_rx_save: unlock\n");
sram_bulk_read_buffer(SHARED_MEM_RX_LOC_STATE,scratchpad_region_rx,SHARED_MEM_RX_LOC_SIZE);
scratchpad_locked_rx = 0;
}
void shared_memory_scratchpad_region_rx_restore()
{
debug(DEBUG_SHM,"shared_memory_scratchpad_region_tx_save: lock\n");
sram_bulk_copy(SHARED_MEM_RX_LOC_STATE,scratchpad_region_rx,SHARED_MEM_RX_LOC_SIZE);
scratchpad_locked_rx = 1;
}
void shared_memory_scratchpad_tx_save()
{
scratchpad_state = sram_read(SHARED_MEM_TX_LOC_STATE);
@@ -70,6 +116,9 @@ void shared_memory_irq_restore()
void shared_memory_write(uint8_t cmd, uint8_t value)
{
if (scratchpad_locked_tx)
debug(DEBUG_SHM,"shared_memory_write: locked_tx\n");
debug(DEBUG_SHM,"shared_memory_write: 0x%04x=0x%02x 0x%04x=0x%02x \n",
SHARED_MEM_TX_LOC_CMD, cmd, SHARED_MEM_TX_LOC_PAYLOAD, value);
@@ -124,6 +173,9 @@ void shared_memory_yield()
int shared_memory_read(uint8_t *cmd, uint8_t *len,uint8_t *buffer)
{
uint8_t state;
if (scratchpad_locked_rx)
debug(DEBUG_SHM,"shared_memory_write: locked_tx\n");
state = sram_read(SHARED_MEM_RX_LOC_STATE);