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stmhal: Small simplification of code to tickle DMA idle counter.

This commit is contained in:
Damien George 2015-11-24 15:06:14 +00:00
parent 3baf6b5319
commit 522d454e34
1 changed files with 3 additions and 6 deletions
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9
stmhal/dma.c
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@ -33,7 +33,8 @@
#include "py/obj.h" #include "py/obj.h"
#include "irq.h" #include "irq.h"
#define NSTREAMS_PER_CONTROLLER (8) #define NSTREAMS_PER_CONTROLLER_LOG2 (3)
#define NSTREAMS_PER_CONTROLLER (1 << NSTREAMS_PER_CONTROLLER_LOG2)
#define NCONTROLLERS (2) #define NCONTROLLERS (2)
#define NSTREAM (NCONTROLLERS * NSTREAMS_PER_CONTROLLER) #define NSTREAM (NCONTROLLERS * NSTREAMS_PER_CONTROLLER)
@ -117,11 +118,7 @@ static int get_dma_id(DMA_Stream_TypeDef *dma_stream) {
// Resets the idle counter for the DMA controller associated with dma_id. // Resets the idle counter for the DMA controller associated with dma_id.
static void dma_tickle(int dma_id) { static void dma_tickle(int dma_id) {
if (dma_id < NSTREAMS_PER_CONTROLLER) { dma_idle.counter[(dma_id >> NSTREAMS_PER_CONTROLLER_LOG2) & 1] = 1;
dma_idle.counter[0] = 1;
} else {
dma_idle.counter[1] = 1;
}
} }
static void dma_enable_clock(int dma_id) { static void dma_enable_clock(int dma_id) {