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fixed strange bug with last led and pwm needs one more int

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Former-commit-id: c5e20fed3d84c19032afb64e66a5934fc3db701c
This commit is contained in:
David Brodski 2014-09-19 03:16:15 +02:00
parent 961bef22f5
commit 0e55169f42
1 changed files with 51 additions and 10 deletions
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61
libsrc/leddevice/LedDeviceWS2812b.cpp
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@ -270,6 +270,16 @@ uint32_t arm_ror_imm(uint32_t v, uint32_t sh) {
return d;
}
// rotate register, used to move the 1 around, add 1 to int counter on carry
static inline __attribute__((always_inline))
uint32_t arm_ror_imm_add_on_carry(uint32_t v, uint32_t sh, uint32_t inc) {
uint32_t d;
asm ("RORS %[Rd], %[Rm], %[Is]\n\t"
"ADDCS %[Rd1], %[Rd1], #1"
: [Rd] "=r" (d), [Rd1] "+r" (inc): [Rm] "r" (v), [Is] "i" (sh));
return d;
}
static inline __attribute__((always_inline))
uint32_t arm_ror(uint32_t v, uint32_t sh) {
uint32_t d;
@ -312,12 +322,12 @@ int LedDeviceWS2812b::write(const std::vector<ColorRgb> &ledValues)
// 72 bits per pixel / 32 bits per word = 2.25 words per pixel
// Add 1 to make sure the PWM FIFO gets the message: "we're sending zeroes"
// Times 4 because DMA works in bytes, not words
cbp->length = (mLedCount * 2.25) * 4;
//cbp->length = ((mLedCount * 2.25) + 1) * 4;
// cbp->length = (mLedCount * 2.25) * 4;
cbp->length = ((mLedCount * 2.25) + 1) * 4;
if(cbp->length > NUM_DATA_WORDS * 4) {
cbp->length = NUM_DATA_WORDS * 4;
mLedCount = NUM_DATA_WORDS / 2.25;
//mLedCount = (NUM_DATA_WORDS - 1) / 2.25;
// mLedCount = NUM_DATA_WORDS / 2.25;
mLedCount = (NUM_DATA_WORDS - 1) / 2.25;
}
#ifdef WS2812_ASM_OPTI
@ -380,19 +390,39 @@ int LedDeviceWS2812b::write(const std::vector<ColorRgb> &ledValues)
//remove one to undo optimization
wireBit --;
// fill up the bytes
int rest = 32 - wireBit % 32;
unsigned int oldwireBitValue = wireBit;
// printBinary(PWMWaveform[(int)(oldwireBitValue / 32)], 32);
// printBinary(PWMWaveform[(int)(wireBit / 32)], 32);
// printf(" pre\n");
#ifdef WS2812_ASM_OPTI
int rest = 32 - wireBit % 32; // 64: 32 - used Bits
startbitPattern = (1 << (rest-1)); // set new bitpattern to start at the benigining of one bit (3 bit in wave form)
rest += 32; // add one int extra for pwm
// printBinary(startbitPattern, 32);
// printf(" startbit\n");
unsigned int oldwireBitValue = wireBit;
unsigned int oldbitPattern = startbitPattern;
// zero rest of the 4 bytes / int so that output is 0 (no data is send)
for (int i = 0; i < rest; i += 3){
unsigned int wordOffset = (int)(wireBit / 32);
wireBit += 3;
PWMWaveform[wordOffset] = arm_Bit_Clear_imm(PWMWaveform[wordOffset], startbitPattern);
startbitPattern = arm_ror_imm(startbitPattern, 3);
}
#else
// fill up the bytes
int rest = 32 - wireBit % 32 + 32; // 64: 32 - used Bits + 32 (one int extra for pwm)
unsigned int oldwireBitValue = wireBit;
// zero rest of the 4 bytes / int so that output is 0 (no data is send)
for (int i = 0; i < rest; i += 3){
setPWMBit(wireBit, 0);
wireBit += 3;
}
#endif
// printBinary(PWMWaveform[(int)(oldwireBitValue / 32) -1 ], 32);
// printf(" post\n");
// printBinary(PWMWaveform[(int)(oldwireBitValue / 32)], 32);
@ -410,10 +440,21 @@ int LedDeviceWS2812b::write(const std::vector<ColorRgb> &ledValues)
// restore bit pattern
wireBit = oldwireBitValue;
#ifdef WS2812_ASM_OPTI
startbitPattern = oldbitPattern;
for (int i = 0; i < rest; i += 3){
unsigned int wordOffset = (int)(wireBit / 32);
wireBit += 3;
PWMWaveform[wordOffset] |= startbitPattern;
startbitPattern = arm_ror_imm(startbitPattern, 3);
}
#else
for (int i = 0; i < rest; i += 3){
setPWMBit(wireBit, 1);
wireBit += 3;
}
#endif
// printBinary(PWMWaveform[(int)(oldwireBitValue / 32)], 32);
// printf(" restored\n");