Mirror/inav
1
0
Fork 0
mirror of https://github.com/iNavFlight/inav.git synced 2025-07-23 08:15:26 +03:00
Code Issues Wiki Activity

[BUS] Lazy allocate device scratchpad memory. Will only allocate it if driver accesses it.

Browse source
This commit is contained in:
Konstantin Sharlaimov (DigitalEntity) 2019-03-20 19:45:43 +01:00
parent 4d3bb32b7f
commit ddcca7b1a8
2 changed files with 16 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

15
src/main/drivers/bus.c
View file

@ -27,6 +27,8 @@
#include "platform.h"
#include "build/debug.h"
#include "common/memory.h"
#include "drivers/bus.h"
#include "drivers/io.h"
@ -199,16 +201,25 @@ void busSetSpeed(const busDevice_t * dev, busSpeed_e speed)
uint32_t busDeviceReadScratchpad(const busDevice_t * dev)
{
return dev->scratchpad[0];
uint32_t * mem = busDeviceGetScratchpadMemory(dev);
return (mem != NULL) ? mem[0] : 0;
}
void busDeviceWriteScratchpad(busDevice_t * dev, uint32_t value)
{
dev->scratchpad[0] = value;
uint32_t * mem = busDeviceGetScratchpadMemory(dev);
if (mem != NULL) {
mem[0] = value;
}
}
void * busDeviceGetScratchpadMemory(const busDevice_t * dev)
{
if (dev->scratchpad == NULL) {
((busDevice_t *)dev)->scratchpad = memAllocate(BUS_SCRATCHPAD_MEMORY_SIZE, OWNER_SYSTEM);
}
return (void *)dev->scratchpad;
}

6
src/main/drivers/bus.h
View file

@ -192,9 +192,9 @@ typedef struct busDevice_s {
#endif
} busdev;
IO_t irqPin; // Device IRQ pin. Bus system will only assign IO_t object to this var. Initialization is up to device driver
uint32_t scratchpad[BUS_SCRATCHPAD_MEMORY_SIZE / sizeof(uint32_t)]; // Memory where device driver can store persistent data. Zeroed out when initializing the device
// for the first time. Useful when once device is shared between several sensors
// (like MPU/ICM acc-gyro sensors)
uint32_t * scratchpad; // Memory where device driver can store persistent data. Zeroed out when initializing the device
// for the first time. Useful when once device is shared between several sensors
// (like MPU/ICM acc-gyro sensors)
} busDevice_t;
#ifdef __APPLE__