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added optimized spread/pack utils + "high-speed" variants of DOut UU

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MightyPork
2018-02-15 00:40:21 +01:00
parent 658b1befee
commit 7622cf0aaf
4 changed files with 86 additions and 30 deletions
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platform/hw_utils.c
+16 -5
View File
@@ -240,34 +240,45 @@ char * pinmask2str_up(uint32_t pins, char *buffer)
return buffer;
}
/** Spread packed port pins using a mask */
uint32_t pinmask_spread(uint32_t packed, uint32_t mask)
/** spread a packed pinfield using a mask */
uint32_t pinmask_spread_32(uint32_t packed, uint32_t mask)
{
uint32_t result = 0;
uint32_t poke = 1;
if(packed == 0) return 0;
for (int i = 0; i<32; i++) {
if (mask & (1<<i)) {
if (mask & 1) {
if (packed & poke) {
result |= 1<<i;
packed ^= poke;
if (packed == 0) break;
}
poke <<= 1;
}
mask >>= 1;
// if (mask == 0) break;
}
return result;
}
/** Pack spread port pins using a mask */
uint32_t pinmask_pack(uint32_t spread, uint32_t mask)
uint32_t pinmask_pack_32(uint32_t spread, uint32_t mask)
{
uint32_t result = 0;
uint32_t poke = 1;
for (int i = 0; i<32; i++) {
if (mask & (1<<i)) {
if (mask & 1) {
if (spread & (1<<i)) {
result |= poke;
spread ^= (1<<i);
if (spread == 0) break;
}
poke <<= 1;
}
mask >>= 1;
// if (mask == 0) break;
}
return result;
}
platform/hw_utils.h
+12 -2
View File
@@ -98,7 +98,12 @@ char * pinmask2str_up(uint32_t pins, char *buffer);
* @param mask - positions of the bits (eg. 0x8803)
* @return - bits spread to their positions (always counting from right)
*/
uint32_t pinmask_spread(uint32_t packed, uint32_t mask);
uint32_t pinmask_spread_32(uint32_t packed, uint32_t mask);
static inline uint16_t pinmask_spread(uint16_t packed, uint16_t mask)
{
return (uint16_t) pinmask_spread_32(packed, mask);
}
/**
* Pack spread port pins using a mask
@@ -107,7 +112,12 @@ uint32_t pinmask_spread(uint32_t packed, uint32_t mask);
* @param mask - mask of the bits we want to pack (eg. 0x8803)
* @return - packed bits, right aligned (eg. 0b1110)
*/
uint32_t pinmask_pack(uint32_t spread, uint32_t mask);
uint32_t pinmask_pack_32(uint32_t spread, uint32_t mask);
static inline uint16_t pinmask_pack(uint32_t spread, uint32_t mask)
{
return (uint16_t) pinmask_pack_32(spread, mask);
}
/**
* Convert spread port pin number to a packed index using a mask