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HAL_LInux: RCInput for Navio 

Cleaned the code a bit

Signed-off-by: Daniel Frenzel <dgdanielf@gmail.com>
This commit is contained in:
Daniel Frenzel 2015-07-01 14:04:57 +02:00 committed by Andrew Tridgell
parent 20a04bad77
commit c49e44d02c
2 changed files with 69 additions and 98 deletions
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126
libraries/AP_HAL_Linux/RCInput_Navio.cpp
View File

@ -136,74 +136,54 @@ Memory_table::~Memory_table()
free(_phys_pages);
}
//Get physical address from the corresponding virtual adress from memory_table.
void* Memory_table::get_phys_addr(void* virt_addr)
{
uint32_t i;
for (i = 0; i < _page_count; i++) {
if ((uint32_t) _virt_pages[i] == (((uint32_t) virt_addr) & 0xFFFFF000)) {
return (void*) (((uint32_t) _phys_pages[i] + ((uint32_t) virt_addr & 0xFFF)));
}
}
return NULL;
}
//Get virtual address from the corresponding physical adress from memory_table.
void* Memory_table::get_virt_addr(void* phys_addr)
{
uint32_t i;
// phys_addr = (void*)((uint32_t) phys_addr);
for (i = 0; i < _page_count; i++) {
if ((uint32_t) _phys_pages[i] == (((uint32_t) phys_addr) & 0xFFFFF000)) {
return (void*) ((uint32_t) _virt_pages[i] + ((uint32_t) phys_addr & 0xFFF));
}
}
return NULL;
}
// This function returns virtual address with help of pointer, which is offset from the beginning of the buffer.
void* Memory_table::get_virt_from_pointer(uint32_t pointer)
{
if (pointer >= PAGE_SIZE * _page_count) {
return NULL;
}
return (uint8_t*)_virt_pages[(uint32_t) pointer / 4096] + pointer % 4096;
}
// This function returns physical address with help of pointer, which is offset from the beginning of the buffer.
void* Memory_table::get_phys_from_pointer(uint32_t pointer)
void* Memory_table::get_page(void** const pages, uint32_t addr) const
{
if (pointer >= PAGE_SIZE * _page_count) {
if (addr >= PAGE_SIZE * _page_count) {
return NULL;
}
return (uint8_t*)_phys_pages[(uint32_t) pointer / 4096] + pointer % 4096;
return (uint8_t*)pages[(uint32_t) addr / 4096] + addr % 4096;
}
// This function returns offset from the beginning of the buffer using virtual address and memory_table.
uint32_t Memory_table::get_pointer_from_virt(void* virt_addr)
//Get virtual address from the corresponding physical address from memory_table.
void* Memory_table::get_virt_addr(const uint32_t phys_addr) const
{
uint32_t i;
for (i = 0; i < _page_count; i++) {
if ((uint32_t) _virt_pages[i] == (((uint32_t) virt_addr) & 0xFFFFF000)) {
return (i*PAGE_SIZE + ((uint32_t) virt_addr & 0xFFF));
// FIXME: Can't the address be calculated directly?
// FIXME: if the address room in _phys_pages is not fragmented one may avoid a complete loop ..
uint32_t i = 0;
for (; i < _page_count; i++) {
if ((uint32_t) _phys_pages[i] == (((uint32_t) phys_addr) & 0xFFFFF000)) {
return (void*) ((uint32_t) _virt_pages[i] + (phys_addr & 0xFFF));
}
}
return NULL;
}
// FIXME: in-congruent function style see above
// This function returns offset from the beginning of the buffer using virtual address and memory_table.
uint32_t Memory_table::get_offset(void ** const pages, const uint32_t addr) const
{
uint32_t i = 0;
for (; i < _page_count; i++) {
if ((uint32_t) pages[i] == (addr & 0xFFFFF000) ) {
return (i*PAGE_SIZE + (addr & 0xFFF));
}
}
return -1;
}
//How many bytes are available for reading in circle buffer?
uint32_t Memory_table::bytes_available(void* read_addr, void* write_addr)
uint32_t Memory_table::bytes_available(const uint32_t read_addr, const uint32_t write_addr) const
{
if (write_addr > read_addr) {
return ((uint32_t) write_addr - (uint32_t) read_addr);
return (write_addr - read_addr);
}
else {
return _page_count * PAGE_SIZE - ((uint32_t) read_addr - (uint32_t) write_addr);
return _page_count * PAGE_SIZE - (read_addr - write_addr);
}
}
uint32_t Memory_table::get_page_count()
uint32_t Memory_table::get_page_count() const
{
return _page_count;
}
@ -240,7 +220,6 @@ int get_raspberry_pi_version()
}
//Physical addresses of peripheral depends on Raspberry Pi's version
void LinuxRCInput_Navio::set_physical_addresses(int version)
{
if (version == 1) {
@ -297,7 +276,6 @@ void LinuxRCInput_Navio::stop_dma_and_exit(int param)
void LinuxRCInput_Navio::init_ctrl_data()
{
uint32_t phys_fifo_addr;
uint64_t i;
uint32_t dest = 0;
uint32_t cbp = 0;
dma_cb_t* cbp_curr;
@ -320,20 +298,21 @@ void LinuxRCInput_Navio::init_ctrl_data()
*/
// fprintf(stderr, "ERROR SEARCH1\n");
for (i = 0; i < 56 * 128 * RCIN_NAVIO_BUFFER_LENGTH; i++)
uint32_t i = 0;
for (i = 0; i < 56 * 128 * RCIN_NAVIO_BUFFER_LENGTH; i++) // 8 * 56 * 128 == 57344
{
//Transfer timer every 56th sample
if(i % 56 == 0){
cbp_curr = (dma_cb_t*)con_blocks->get_virt_from_pointer(cbp);
//Transfer timer every 56th sample
if(i % 56 == 0) {
cbp_curr = (dma_cb_t*)con_blocks->get_page(con_blocks->_virt_pages, cbp);
init_dma_cb(&cbp_curr, RCIN_NAVIO_DMA_NO_WIDE_BURSTS | RCIN_NAVIO_DMA_WAIT_RESP | RCIN_NAVIO_DMA_DEST_INC | RCIN_NAVIO_DMA_SRC_INC, RCIN_NAVIO_TIMER_BASE, (uint32_t) circle_buffer->get_phys_from_pointer(dest), 8, 0, (uint32_t) con_blocks->get_phys_from_pointer(cbp + sizeof(dma_cb_t)));
dest += 8;
cbp += sizeof(dma_cb_t);
}
init_dma_cb(&cbp_curr, RCIN_NAVIO_DMA_NO_WIDE_BURSTS | RCIN_NAVIO_DMA_WAIT_RESP | RCIN_NAVIO_DMA_DEST_INC | RCIN_NAVIO_DMA_SRC_INC, RCIN_NAVIO_TIMER_BASE, (uint32_t) circle_buffer->get_page(circle_buffer->_phys_pages, dest), 8, 0, (uint32_t) con_blocks->get_page(con_blocks->_phys_pages, cbp + sizeof(dma_cb_t)));
dest += 8;
cbp += sizeof(dma_cb_t);
}
// Transfer GPIO (1 byte)
cbp_curr = (dma_cb_t*)con_blocks->get_virt_from_pointer(cbp);
init_dma_cb(&cbp_curr, RCIN_NAVIO_DMA_NO_WIDE_BURSTS | RCIN_NAVIO_DMA_WAIT_RESP, RCIN_NAVIO_GPIO_LEV0_ADDR, (uint32_t) circle_buffer->get_phys_from_pointer(dest), 1, 0, (uint32_t) con_blocks->get_phys_from_pointer(cbp + sizeof(dma_cb_t)));
cbp_curr = (dma_cb_t*)con_blocks->get_page(con_blocks->_virt_pages, cbp);
init_dma_cb(&cbp_curr, RCIN_NAVIO_DMA_NO_WIDE_BURSTS | RCIN_NAVIO_DMA_WAIT_RESP, RCIN_NAVIO_GPIO_LEV0_ADDR, (uint32_t) circle_buffer->get_page(circle_buffer->_phys_pages, dest), 1, 0, (uint32_t) con_blocks->get_page(con_blocks->_phys_pages, cbp + sizeof(dma_cb_t)));
dest += 1;
cbp += sizeof(dma_cb_t);
@ -341,13 +320,13 @@ void LinuxRCInput_Navio::init_ctrl_data()
/* DMA is waiting data request signal (DREQ) from PCM. PCM is set for 1 MhZ freqency, so,
each sample of GPIO is limited by writing to PCA queue.
*/
cbp_curr = (dma_cb_t*)con_blocks->get_virt_from_pointer(cbp);
init_dma_cb(&cbp_curr, RCIN_NAVIO_DMA_NO_WIDE_BURSTS | RCIN_NAVIO_DMA_WAIT_RESP | RCIN_NAVIO_DMA_D_DREQ | RCIN_NAVIO_DMA_PER_MAP(2), RCIN_NAVIO_TIMER_BASE, phys_fifo_addr, 4, 0, (uint32_t) con_blocks->get_phys_from_pointer(cbp + sizeof(dma_cb_t)));
cbp_curr = (dma_cb_t*)con_blocks->get_page(con_blocks->_virt_pages, cbp);
init_dma_cb(&cbp_curr, RCIN_NAVIO_DMA_NO_WIDE_BURSTS | RCIN_NAVIO_DMA_WAIT_RESP | RCIN_NAVIO_DMA_D_DREQ | RCIN_NAVIO_DMA_PER_MAP(2), RCIN_NAVIO_TIMER_BASE, phys_fifo_addr, 4, 0, (uint32_t) con_blocks->get_page(con_blocks->_phys_pages, cbp + sizeof(dma_cb_t)));
cbp += sizeof(dma_cb_t);
}
//Make last control block point to the first (to make circle)
cbp -= sizeof(dma_cb_t);
((dma_cb_t*)con_blocks->get_virt_from_pointer(cbp))->next = (uint32_t) con_blocks->get_phys_from_pointer(0);
((dma_cb_t*)con_blocks->get_page(con_blocks->_virt_pages, cbp))->next = (uint32_t) con_blocks->get_page(con_blocks->_phys_pages, 0);
}
@ -388,7 +367,7 @@ void LinuxRCInput_Navio::init_DMA()
dma_reg[RCIN_NAVIO_DMA_CS | RCIN_NAVIO_DMA_CHANNEL << 8] = RCIN_NAVIO_DMA_RESET; //Reset DMA
hal.scheduler->delay_microseconds(100);
dma_reg[RCIN_NAVIO_DMA_CS | RCIN_NAVIO_DMA_CHANNEL << 8] = RCIN_NAVIO_DMA_INT | RCIN_NAVIO_DMA_END;
dma_reg[RCIN_NAVIO_DMA_CONBLK_AD | RCIN_NAVIO_DMA_CHANNEL << 8] = reinterpret_cast<uint32_t>(con_blocks->get_phys_from_pointer(0));//Set first control block address
dma_reg[RCIN_NAVIO_DMA_CONBLK_AD | RCIN_NAVIO_DMA_CHANNEL << 8] = reinterpret_cast<uint32_t>(con_blocks->get_page(con_blocks->_phys_pages, 0));//Set first control block address
dma_reg[RCIN_NAVIO_DMA_DEBUG | RCIN_NAVIO_DMA_CHANNEL << 8] = 7; // clear debug error flags
dma_reg[RCIN_NAVIO_DMA_CS | RCIN_NAVIO_DMA_CHANNEL << 8] = 0x10880001; // go, mid priority, wait for outstanding writes
}
@ -424,7 +403,6 @@ LinuxRCInput_Navio::LinuxRCInput_Navio():
//Init memory for buffer and for DMA control blocks. See comments in "init_ctrl_data()" to understand values "2" and "113"
circle_buffer = new Memory_table(RCIN_NAVIO_BUFFER_LENGTH * 2, version);
con_blocks = new Memory_table(RCIN_NAVIO_BUFFER_LENGTH * 113, version);
}
LinuxRCInput_Navio::~LinuxRCInput_Navio()
@ -460,10 +438,10 @@ void LinuxRCInput_Navio::init(void*)
hal.scheduler->delay(300);
//Reading first sample
curr_tick = *((uint64_t*) circle_buffer->get_virt_from_pointer(curr_pointer));
curr_tick = *((uint64_t*) circle_buffer->get_page(circle_buffer->_virt_pages, curr_pointer));
prev_tick = curr_tick;
curr_pointer += 8;
curr_signal = *((uint8_t*) circle_buffer->get_virt_from_pointer(curr_pointer)) & 0x10 ? 1 : 0;
curr_signal = *((uint8_t*) circle_buffer->get_page(circle_buffer->_virt_pages, curr_pointer)) & 0x10 ? 1 : 0;
last_signal = curr_signal;
curr_pointer++;
}
@ -476,15 +454,15 @@ void LinuxRCInput_Navio::_timer_tick()
void* x;
//Now we are getting address in which DMAC is writing at current moment
dma_cb_t* ad = (dma_cb_t*) con_blocks->get_virt_addr((void*)dma_reg[RCIN_NAVIO_DMA_CONBLK_AD | RCIN_NAVIO_DMA_CHANNEL << 8]);
dma_cb_t* ad = (dma_cb_t*) con_blocks->get_virt_addr(dma_reg[RCIN_NAVIO_DMA_CONBLK_AD | RCIN_NAVIO_DMA_CHANNEL << 8]);
for(j = 1; j >= -1; j--){
x = circle_buffer->get_virt_addr((void*)(ad + j)->dst);
if(x != NULL) {
break;}
x = circle_buffer->get_virt_addr((ad + j)->dst);
if(x != NULL) {
break;}
}
//How many bytes have DMA transfered (and we can process)?
counter = circle_buffer->bytes_available((void*)curr_pointer, (void*)circle_buffer->get_pointer_from_virt(x));
counter = circle_buffer->bytes_available(curr_pointer, circle_buffer->get_offset(circle_buffer->_virt_pages, (uint32_t)x));
//We can't stay in method for a long time, because it may lead to delays
if (counter > RCIN_NAVIO_MAX_COUNTER) {
counter = RCIN_NAVIO_MAX_COUNTER;
@ -494,12 +472,12 @@ void LinuxRCInput_Navio::_timer_tick()
for (;counter > 0x40;counter--) {
//Is it timer samle?
if (curr_pointer % (64) == 0) {
curr_tick = *((uint64_t*) circle_buffer->get_virt_from_pointer(curr_pointer));
curr_tick = *((uint64_t*) circle_buffer->get_page(circle_buffer->_virt_pages, curr_pointer));
curr_pointer+=8;
counter-=8;
}
//Reading required bit
curr_signal = *((uint8_t*) circle_buffer->get_virt_from_pointer(curr_pointer)) & 0x10 ? 1 : 0;
curr_signal = *((uint8_t*) circle_buffer->get_page(circle_buffer->_virt_pages, curr_pointer)) & 0x10 ? 1 : 0;
//If the signal changed
if (curr_signal != last_signal) {
delta_time = curr_tick - prev_tick;

39
libraries/AP_HAL_Linux/RCInput_Navio.h
View File

@ -23,7 +23,6 @@
#include <queue>
enum state_t{
RCIN_NAVIO_INITIAL_STATE = -1,
RCIN_NAVIO_ZERO_STATE = 0,
@ -45,51 +44,45 @@ typedef struct {
stride, next, pad[2];
} dma_cb_t;
class Memory_table{
private:
class Memory_table {
// Allow LinuxRCInput_Navio access to private members of Memory_table
friend class Linux::LinuxRCInput_Navio;
private:
void** _virt_pages;
void** _phys_pages;
uint32_t _page_count;
public:
public:
Memory_table();
Memory_table(uint32_t, int);
~Memory_table();
//Get physical address from the corresponding virtual adress from memory_table.
void* get_phys_addr(void* virt_addr);
//Get virtual address from the corresponding physical adress from memory_table.
void* get_virt_addr(void* phys_addr);
// This function returns virtual address with help of pointer, which is offset from the beginning of the buffer.
void* get_virt_from_pointer(uint32_t pointer);
//Get virtual address from the corresponding physical address from memory_table.
void* get_virt_addr(const uint32_t phys_addr) const;
// This function returns physical address with help of pointer, which is offset from the beginning of the buffer.
void* get_phys_from_pointer(uint32_t pointer);
void* get_page(void **pages, const uint32_t addr) const;
// This function returns offset from the beginning of the buffer using virtual address and memory_table.
uint32_t get_pointer_from_virt(void* virt_addr);
// This function returns offset from the beginning of the buffer using (virtual) address in 'pages' and memory_table.
uint32_t get_offset(void **pages, const uint32_t addr) const;
//How many bytes are available for reading in circle buffer?
uint32_t bytes_available(void* read_addr, void* write_addr);
uint32_t bytes_available(const uint32_t read_addr, const uint32_t write_addr) const;
uint32_t get_page_count();
uint32_t get_page_count() const;
};
class Linux::LinuxRCInput_Navio : public Linux::LinuxRCInput
{
public:
public:
void init(void*);
void _timer_tick(void);
LinuxRCInput_Navio();
~LinuxRCInput_Navio();
private:
private:
//Physical adresses of peripherals. Are different on different Raspberries.
uint32_t dma_base;
@ -123,7 +116,7 @@ class Linux::LinuxRCInput_Navio : public Linux::LinuxRCInput
AP_HAL::DigitalSource *enable_pin;
void init_dma_cb(dma_cb_t** cbp, uint32_t mode, uint32_t source, uint32_t dest, uint32_t length, uint32_t stride, uint32_t next_cb);
void init_dma_cb(dma_cb_t** cbp, uint32_t mode, uint32_t source, uint32_t dest, uint32_t length, uint32_t stride, uint32_t next_cb);
void* map_peripheral(uint32_t base, uint32_t len);
void init_registers();
void init_ctrl_data();