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Lgt8f328p (#633)

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* 32Mhz 800Kbps
* 32Mhz 400Kbps
* Tuned and Tested
This commit is contained in:
Michael Miller
2023-02-02 13:00:59 -08:00
committed by GitHub
parent d3bc27b9f0
commit e0d7f6e84a
2 changed files with 77 additions and 3 deletions
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9
src/internal/NeoAvrMethod.h
View File

@@ -39,6 +39,7 @@ extern "C"
void send_data_12mhz_400(uint8_t* data, size_t sizeData, volatile uint8_t* port, uint8_t pinMask);
void send_data_16mhz_800(uint8_t* data, size_t sizeData, volatile uint8_t* port, uint8_t pinMask);
void send_data_16mhz_400(uint8_t* data, size_t sizeData, volatile uint8_t* port, uint8_t pinMask);
void send_data_32mhz(uint8_t* data, size_t sizeData, volatile uint8_t* port, uint8_t pinMask, const uint8_t cycleTiming);
}
class NeoAvrSpeed800KbpsBase
@@ -62,8 +63,10 @@ public:
#endif // PORTD
send_data_12mhz_800_PortB(data, sizeData, pinMask);
#elif (F_CPU >= 15400000UL) && (F_CPU <= 19000000L) // 16Mhz CPU
#elif (F_CPU >= 15400000UL) && (F_CPU <= 19000000UL) // 16Mhz CPU
send_data_16mhz_800(data, sizeData, port, pinMask);
#elif (F_CPU >= 31000000UL) && (F_CPU <= 35000000UL) // 32Mhz CPU
send_data_32mhz(data, sizeData, port, pinMask, 3);
#else
#error "CPU SPEED NOT SUPPORTED"
#endif
@@ -112,8 +115,10 @@ public:
#elif (F_CPU >= 11100000UL) && (F_CPU <= 14300000UL) // 12Mhz CPU
send_data_12mhz_400(data, sizeData, port, pinMask);
#elif (F_CPU >= 15400000UL) && (F_CPU <= 19000000L) // 16Mhz CPU
#elif (F_CPU >= 15400000UL) && (F_CPU <= 19000000UL) // 16Mhz CPU
send_data_16mhz_400(data, sizeData, port, pinMask);
#elif (F_CPU >= 31000000UL) && (F_CPU <= 35000000UL) // 32Mhz CPU
send_data_32mhz(data, sizeData, port, pinMask, 7);
#else
#error "CPU SPEED NOT SUPPORTED"
#endif

71
src/internal/NeoPixelAvr.c
View File

@@ -520,7 +520,7 @@ void send_data_12mhz_400(uint8_t* data, size_t sizeData, volatile uint8_t* port,
[ptr] "e" (ptr));
}
#elif (F_CPU >= 15400000UL) && (F_CPU <= 19000000L) // 16Mhz CPU
#elif (F_CPU >= 15400000UL) && (F_CPU <= 19000000UL) // 16Mhz CPU
void send_data_16mhz_800(uint8_t* data, size_t sizeData, volatile uint8_t* port, uint8_t pinMask)
{
@@ -641,6 +641,75 @@ void send_data_16mhz_400(uint8_t* data, size_t sizeData, volatile uint8_t* port,
[lo] "r" (lo));
}
#elif (F_CPU >= 31000000UL) && (F_CPU <= 35000000UL) // 32Mhz CPU
void send_data_32mhz(uint8_t* data,
size_t sizeData,
volatile uint8_t* port,
uint8_t pinMask,
const uint8_t cycleTiming)
{
volatile uint16_t i = (uint16_t)sizeData; // Loop counter
volatile uint8_t* ptr = data; // Pointer to next byte
volatile uint8_t b = *ptr++; // Current byte value
volatile uint8_t hi; // PORT w/output bit set high
volatile uint8_t lo; // PORT w/output bit set low
volatile uint8_t next;
volatile uint8_t bit;
volatile uint8_t cycle;
volatile uint8_t cycleCount;
hi = *port | pinMask;
lo = *port & ~pinMask;
next = lo;
bit = 8;
cycleCount = cycleTiming;
asm volatile(
"head20:" "\n\t" // Clk Pseudocode
"st %a[port], %[hi]" "\n\t" // 2 PORT = hi
"sbrc %[byte], 7" "\n\t" // 1-2 if(b & 128)
"mov %[next], %[hi]" "\n\t" // 0-1 next = hi
"mov %[cycle], %[cycleCount]" "\n\t" // 0-1 cycle = shortCycle
"cycleLoop1:" "\n\t"
"dec %[cycle]" "\n\t" // 1 cycle--
"brne cycleLoop1" "\n\t" // 2 if(cycle != 0) -> (cycleLoop1)
"st %a[port], %[next]" "\n\t" // 2 PORT = next
"mov %[cycle], %[cycleCount]" "\n\t" // 0-1 cycle = shortCycle
"cycleLoop2:" "\n\t"
"dec %[cycle]" "\n\t" // 1 cycle--
"brne cycleLoop2" "\n\t" // 2 if(cycle != 0) -> (cycleLoop2)
"rjmp .+0" "\n\t" // 2 nop nop (timing tuning)
"st %a[port], %[lo]" "\n\t" // 2 PORT = lo
"mov %[next] , %[lo]" "\n\t" // 1 next = lo
"mov %[cycle], %[cycleCount]" "\n\t" // 0-1 cycle = shortCycle
"cycleLoop3:" "\n\t"
"dec %[cycle]" "\n\t" // 1 cycle--
"brne cycleLoop3" "\n\t" // 2 if(cycle != 0) -> (cycleLoop3)
"dec %[bit]" "\n\t" // 1 bit--
"breq nextbyte20" "\n\t" // 1-2 if(bit == 0) (from dec above)
"rol %[byte]" "\n\t" // 1 b <<= 1 (T = 15)
"rjmp head20" "\n\t" // 2 -> head20 (next bit out)
"nextbyte20:" "\n\t" // (T = 15)
"ldi %[bit] , 8" "\n\t" // 1 bit = 8 (T = 16)
"ld %[byte] , %a[ptr]+" "\n\t" // 2 b = *ptr++ (T = 18)
"sbiw %[count], 1" "\n\t" // 2 i-- (T = 38)
"brne head20" "\n" // 2 if(i != 0) -> (next byte)
// outputs
: [port] "+e" (port),
[byte] "+r" (b),
[bit] "+r" (bit),
[next] "+r" (next),
[cycle] "+r" (cycle),
[count] "+w" (i)
// inputs
: [ptr] "e" (ptr),
[hi] "r" (hi),
[lo] "r" (lo),
[cycleCount] "r" (cycleCount));
}
#else
#error "CPU SPEED NOT SUPPORTED"
#endif